TWI500962B - Lens module - Google Patents
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- TWI500962B TWI500962B TW102144927A TW102144927A TWI500962B TW I500962 B TWI500962 B TW I500962B TW 102144927 A TW102144927 A TW 102144927A TW 102144927 A TW102144927 A TW 102144927A TW I500962 B TWI500962 B TW I500962B
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本發明是有關於一種用於照相機之鏡頭模組，且特別是有關於一種能夠實現高解析度效能及相對明亮的光學系統之鏡頭模組。 The present invention relates to a lens module for a camera, and more particularly to a lens module capable of achieving high resolution performance and a relatively bright optical system.
最新的移動通信終端(mobile communications terminals)具有隨其提供之照相機，允許視訊通信及影像捕捉。此外，隨著移動通信終端中所包括之照相機的功能性已逐漸增加，移動終端之照相機已逐漸被要求具有高解析度及高度功能性。 The latest mobile communications terminals have cameras that are provided to allow video communications and video capture. Furthermore, as the functionality of cameras included in mobile communication terminals has gradually increased, cameras of mobile terminals have been increasingly required to have high resolution and high functionality.
然而，存在製造更小且更輕的移動終端的趨勢，且因此對於實現具有高解析度之高度功能性照相機可能存在限制。 However, there is a tendency to make smaller and lighter mobile terminals, and thus there may be limitations to achieving highly functional cameras with high resolution.
為解決這些問題，近來，照相機之透鏡已由重量比玻璃輕之塑膠形成，且已提供構成鏡頭模組之4個以上的透鏡來實現高解析度。 In order to solve these problems, recently, the lens of the camera has been formed of a plastic which is lighter than glass, and four or more lenses constituting the lens module have been provided to achieve high resolution.
然而，色差(chromatic aberration)方面之改良可能在由塑膠而非玻璃製成之透鏡中更難以實現，且與玻璃透鏡相比，亦難以使用塑膠透鏡實現相對明亮的光學系統。 However, improvements in chromatic aberration may be more difficult to achieve in lenses made of plastic rather than glass, and it is also difficult to achieve relatively bright optical systems using plastic lenses compared to glass lenses.
專利文件1及2揭露相關技術中用於實現高解析度照相機模組之鏡頭模組。 Patent Documents 1 and 2 disclose a lens module for realizing a high-resolution camera module in the related art.
(專利文件1)KR2012-018573 A (Patent Document 1) KR2012-018573 A
(專利文件2)KR2007-097369 A (Patent Document 2) KR2007-097369 A
本發明之一個態樣提供一種能夠實現高解析度效能及相對明亮的光學系統的鏡頭模組。 One aspect of the present invention provides a lens module that is capable of achieving high resolution performance and a relatively bright optical system.
根據本發明之一個態樣，鏡頭模組可包括：具有正折射能力(refractive power)之第一透鏡，其物側表面為凸面；具有負折射能力之第二透鏡，其像側表面為凹面；具有正折射能力之第三透鏡；具有負折射能力之第四透鏡，其像側表面為凸面；以及具有負折射能力之第五透鏡，其像側表面為凹面，其中所述第四透鏡滿足條件表達式1，
其中f為光學系統之總焦距，且f4為第四透鏡之焦距。 Where f is the total focal length of the optical system and f4 is the focal length of the fourth lens.
第一透鏡及第四透鏡可滿足條件表達式2，[條件表達式2]20<ν1-ν4<40 The first lens and the fourth lens can satisfy the conditional expression 2, [Conditional Expression 2] 20 < ν 1 - ν 4 < 40
其中υ1為第一透鏡之阿貝數(abbe number)，且υ4為第四透鏡之阿貝數。 Where υ1 is the Abbe number of the first lens, and υ4 is the Abbe number of the fourth lens.
第一透鏡及第四透鏡可滿足條件表達式3，[條件表達式3]
其中f1為第一透鏡之焦距，且f4為第四透鏡之焦距。 Where f1 is the focal length of the first lens and f4 is the focal length of the fourth lens.
鏡頭模組可滿足條件表達式4，
其中TL為第一透鏡之物側表面至影像感測器之成像表面的距離，且f為光學系統之總焦距。 Where TL is the distance from the object side surface of the first lens to the imaging surface of the image sensor, and f is the total focal length of the optical system.
第三透鏡可具有凸狀像側表面。 The third lens may have a convex image side surface.
第四透鏡可具有彎月形狀。 The fourth lens may have a meniscus shape.
第五透鏡可具有至少一個在其像側表面上形成的反曲點。 The fifth lens may have at least one inflection point formed on the image side surface thereof.
第二透鏡可滿足條件表達式5，
其中f為光學系統之總焦距，且f2為第二透鏡之焦距。 Where f is the total focal length of the optical system and f2 is the focal length of the second lens.
第三透鏡可滿足條件表達式6，
其中f為光學系統之總焦距，且f3為第三透鏡之焦距。 Where f is the total focal length of the optical system and f3 is the focal length of the third lens.
第二透鏡可滿足條件表達式7，
其中r4為第二透鏡之像側表面的曲率半徑，且f為光學系統 之總焦距。 Where r4 is the radius of curvature of the image side surface of the second lens, and f is an optical system The total focal length.
第二透鏡可滿足條件表達式8，[條件表達式8]1.60<n2<2.10 The second lens can satisfy the conditional expression 8, [Conditional Expression 8] 1.60< n 2<2.10
其中n2為第二透鏡之折射率。 Where n2 is the refractive index of the second lens.
第二透鏡及第四透鏡可滿足條件表達式9，
其中d456為第二透鏡之像側表面至第四透鏡之物側表面的距離，且f為光學系統之總焦距。 Where d456 is the distance from the image side surface of the second lens to the object side surface of the fourth lens, and f is the total focal length of the optical system.
第一透鏡可具有凹狀像側表面。 The first lens may have a concave image side surface.
根據本發明之另一態樣，鏡頭模組可包括：具有正折射能力之第一透鏡，其物側表面為凸面；具有負折射能力之第二透鏡，其像側表面為凹面；具有朝向影像的凸面之彎月形之第三透鏡；具有負折射能力之第四透鏡，其像側表面為凸面；以及具有負折射能力之第五透鏡，其像側表面為凹面，其中第四透鏡滿足條件表達式1，
其中f為光學系統之總焦距，且f4為第四透鏡之焦距。 Where f is the total focal length of the optical system and f4 is the focal length of the fourth lens.
第一透鏡及第四透鏡可滿足條件表達式2，[條件表達式2]20<ν1-ν4<40 The first lens and the fourth lens can satisfy the conditional expression 2, [Conditional Expression 2] 20 < ν 1 - ν 4 < 40
其中υ1為第一透鏡之阿貝數，且υ4為第四透鏡之阿貝數。 Where υ1 is the Abbe number of the first lens, and υ4 is the Abbe number of the fourth lens.
第一透鏡及第四透鏡可滿足條件表達式3，
其中f1為第一透鏡之焦距，且f4為第四透鏡之焦距。 Where f1 is the focal length of the first lens and f4 is the focal length of the fourth lens.
鏡頭模組可滿足條件表達式4，
其中TL為第一透鏡之物側表面至影像感測器之成像表面的距離，且f為光學系統之總焦距(overall focal distance)。 Where TL is the distance from the object side surface of the first lens to the imaging surface of the image sensor, and f is the overall focal distance of the optical system.
第三透鏡可具有朝向影像之凸面。 The third lens can have a convex surface that faces the image.
第五透鏡可具有在其物側表面及像側表面中之至少一者上形成之至少一個反曲點(inflection point)。 The fifth lens may have at least one inflection point formed on at least one of an object side surface and an image side surface.
第二透鏡可滿足條件表達式5，
其中f為光學系統之總焦距，且f2為第二透鏡之焦距。 Where f is the total focal length of the optical system and f2 is the focal length of the second lens.
第三透鏡可滿足條件表達式6，
其中f為光學系統之總焦距，且f3為第三透鏡之焦距。 Where f is the total focal length of the optical system and f3 is the focal length of the third lens.
第二透鏡可滿足條件表達式7，
其中r4為第二透鏡之像側表面的曲率半徑，且f為光學系統之總焦距。 Where r4 is the radius of curvature of the image side surface of the second lens, and f is the total focal length of the optical system.
第二透鏡可滿足條件表達式8，[條件表達式8]1.60<n2<2.10 The second lens can satisfy the conditional expression 8, [Conditional Expression 8] 1.60< n 2<2.10
其中n2為第二透鏡之折射率。 Where n2 is the refractive index of the second lens.
第二透鏡及第四透鏡可滿足條件表達式9，
其中d456為第二透鏡之像側表面至第四透鏡之物側表面的距離，且f為光學系統之總焦距。 Where d456 is the distance from the image side surface of the second lens to the object side surface of the fourth lens, and f is the total focal length of the optical system.
第一透鏡可具有凹狀像側表面。 The first lens may have a concave image side surface.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.059<CT2/f<0.073 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.059<CT2/f<0.073
其中CT2為第二透鏡之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Where CT2 is the thickness [mm] of the central portion of the optical axis of the second lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]1.103<|r2/f|<10.611 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 1.103<|r2/f|<10.611
其中r2為第一透鏡之像側表面之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r2 is the radius of curvature [mm] of the image side surface of the first lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式] 0.640<|r9/f|<1.184 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.640<|r9/f|<1.184
其中r9為第五透鏡之物側表面之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r9 is the radius of curvature [mm] of the object side surface of the fifth lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.800<CT3/f<0.116 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.800<CT3/f<0.116
其中CT3為第三透鏡之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Wherein CT3 is the thickness [mm] of the central portion of the optical axis of the third lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.55<|(r5+r6)/(r5-r6)|<2.57 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.55<|(r5+r6)/(r5-r6)|<2.57
其中r5為第三透鏡之物側表面之曲率半徑[mm]，且r6為第三透鏡之像側表面之曲率半徑[mm]。 Wherein r5 is a radius of curvature [mm] of the object side surface of the third lens, and r6 is a radius of curvature [mm] of the image side surface of the third lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.33<CT3<0.49 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.33<CT3<0.49
其中CT3為第三透鏡之光軸之中心部分的厚度[mm]。 Wherein CT3 is the thickness [mm] of the central portion of the optical axis of the third lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]CT5>CT4 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] CT5>CT4
其中CT4為第四透鏡之光軸之中心部分的厚度[mm]，且CT5為第五透鏡之光軸之中心部分的厚度[mm]。 Wherein CT4 is the thickness [mm] of the central portion of the optical axis of the fourth lens, and CT5 is the thickness [mm] of the central portion of the optical axis of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式] 1.38<r1<1.64 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 1.38<r1<1.64
其中r1為第一透鏡之物側表面之曲率半徑[mm]。 Where r1 is the radius of curvature [mm] of the object side surface of the first lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]4.64<|r2|<45.10 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 4.64 <|r2|<45.10
其中r2為第一透鏡之像側表面之曲率半徑[mm]。 Where r2 is the radius of curvature [mm] of the image side surface of the first lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]-1.59<r8<-1.13 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] - 1.59 < r8 < -1.13
其中r8為第四透鏡之像側表面之曲率半徑[mm]。 Where r8 is the radius of curvature [mm] of the image side surface of the fourth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]f>f1 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] f>f1
其中f1為第一透鏡之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f1 is the focal length [mm] of the first lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]f2>f5 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] f2>f5
其中f2為第二透鏡之焦距[mm]，且f5為第五透鏡之焦距[mm]。 Where f2 is the focal length [mm] of the second lens, and f5 is the focal length [mm] of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f4|>f1 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f4|>f1
其中f1為第一透鏡之焦距[mm]，且f4為第四透鏡之焦距 [mm]。 Where f1 is the focal length of the first lens [mm], and f4 is the focal length of the fourth lens [mm].
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f4|>f3 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f4|>f3
其中f3為第三透鏡之焦距[mm]，且f4為第四透鏡之焦距[mm]。 Where f3 is the focal length [mm] of the third lens, and f4 is the focal length [mm] of the fourth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f5|>|f1| In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f5|>|f1|
其中f1為第一透鏡之焦距[mm]，且f5為第五透鏡之焦距[mm]。 Where f1 is the focal length [mm] of the first lens, and f5 is the focal length [mm] of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f5|>|f2| In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f5|>|f2|
其中f2為第二透鏡之焦距[mm]，且f5為第五透鏡之焦距[mm]。 Where f2 is the focal length [mm] of the second lens, and f5 is the focal length [mm] of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f4/f|>f3/f In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f4/f|>f3/f
其中f3為第三透鏡之焦距[mm]，f4為第四透鏡之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f3 is the focal length [mm] of the third lens, f4 is the focal length [mm] of the fourth lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f4/f1|>|f4/f| In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f4/f1|>|f4/f|
其中f1為第一透鏡之焦距[mm]，f4為第四透鏡之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f1 is the focal length [mm] of the first lens, f4 is the focal length [mm] of the fourth lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]25<|f4|<101 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 25<|f4|<101
其中f4為第四透鏡之焦距[mm]。 Where f4 is the focal length [mm] of the fourth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]2.1<|f4/f5|<17.9 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 2.1<|f4/f5|<17.9
其中f4為第四透鏡之焦距[mm]，且f5為第五透鏡之焦距[mm]。 Where f4 is the focal length [mm] of the fourth lens, and f5 is the focal length [mm] of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]3.1<|r5/f|<39.9 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 3.1 <|r5/f|<39.9
其中r5為第三透鏡之像側表面之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r5 is the radius of curvature [mm] of the image side surface of the third lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.07<CT4/f<0.11 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.07<CT4/f<0.11
其中CT4為第四透鏡之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Where CT4 is the thickness [mm] of the central portion of the optical axis of the fourth lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]1.6<r3/r4<2.4 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 1.6 <r3/r4<2.4
其中r3為第二透鏡之物側表面之曲率半徑[mm]，且r4為第二透鏡之像側表面之曲率半徑[mm]。 Wherein r3 is a radius of curvature [mm] of the object side surface of the second lens, and r4 is a radius of curvature [mm] of the image side surface of the second lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]1.58<r9/r10<2.71 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 1.58<r9/r10<2.71
其中r9為第五透鏡之物側表面之曲率半徑[mm]，且r10為第五透鏡之像側表面之曲率半徑[mm]。 Wherein r9 is a radius of curvature [mm] of the object side surface of the fifth lens, and r10 is a radius of curvature [mm] of the image side surface of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]2.1<(r9+r10)/(r9-r10)<4.5 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 2.1 < (r9 + r10) / (r9 - r10) < 4.5
其中r9為第五透鏡之物側表面之曲率半徑[mm]，且r10為第五透鏡之像側表面之曲率半徑[mm]。 Wherein r9 is a radius of curvature [mm] of the object side surface of the fifth lens, and r10 is a radius of curvature [mm] of the image side surface of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]2.4<(r3+r4)/(r3-r4)<3.9 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 2.4 < (r3 + r4) / (r3 - r4) < 3.9
其中r3為第二透鏡之物側表面之曲率半徑[mm]，且r4為第二透鏡之像側表面之曲率半徑[mm]。 Wherein r3 is a radius of curvature [mm] of the object side surface of the second lens, and r4 is a radius of curvature [mm] of the image side surface of the second lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.16<D34<0.44 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.16 < D34 < 0.44
其中D34為第三透鏡之像側表面至第四透鏡之物側表面的距離[mm]。 Wherein D34 is a distance [mm] of the image side surface of the third lens to the object side surface of the fourth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式] 0.33<CT4<0.45 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.33<CT4<0.45
其中CT4為第四透鏡之光軸之中心部分的厚度[mm]。 Where CT4 is the thickness [mm] of the central portion of the optical axis of the fourth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]-1.3<r7<-0.9 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] -1.3 < r7 < -0.9
其中r7為第四透鏡之物側表面之曲率半徑[mm]。 Where r7 is the radius of curvature [mm] of the object side surface of the fourth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]2.6<r9<5.0 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 2.6 < r9 < 5.0
其中r9為第五透鏡之物側表面之曲率半徑[mm]。 Where r9 is the radius of curvature [mm] of the object side surface of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]|f5|>|f3| In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression]|f5|>|f3|
其中f3為第三透鏡之焦距[mm]，且f5為第五透鏡之焦距[mm]。 Where f3 is the focal length [mm] of the third lens, and f5 is the focal length [mm] of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]4.1<f<4.3 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 4.1 < f < 4.3
其中f為光學系統之總焦距[mm]。 Where f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.3<r1/f<0.4 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.3 < r1/f < 0.4
其中r1為第一透鏡之物側表面之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r1 is the radius of curvature [mm] of the object side surface of the first lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.24<CT2<0.32 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.24 < CT2 < 0.32
其中CT2為第二透鏡之光軸之中心部分的厚度[mm]。 Wherein CT2 is the thickness [mm] of the central portion of the optical axis of the second lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.4<f/f3<1.0 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.4 <f/f3<1.0
其中f3為第三透鏡之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f3 is the focal length [mm] of the third lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.4<r4/f<0.5 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.4 < r4 / f < 0.5
其中r4為第二透鏡之像側表面之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r4 is the radius of curvature [mm] of the image side surface of the second lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.15<CT5/f<0.24 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.15<CT5/f<0.24
其中CT5為第五透鏡之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Wherein CT5 is the thickness [mm] of the central portion of the optical axis of the fifth lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.03<|r1/r2|<0.31 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.03<|r1/r2|<0.31
其中r1為第一透鏡之物側表面之曲率半徑[mm]，且r2為第一透鏡之像側表面之曲率半徑[mm]。 Where r1 is the radius of curvature [mm] of the object side surface of the first lens, and r2 is the radius of curvature [mm] of the image side surface of the first lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.3<D23<0.5 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.3 < D23 < 0.5
其中D23為第二透鏡之像側表面至第三透鏡之物側表面的距離[mm]。 Wherein D23 is a distance [mm] of the image side surface of the second lens to the object side surface of the third lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.08<D23/f<0.12 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.08<D23/f<0.12
其中D23為第二透鏡之像側表面至第三透鏡之物側表面的距離[mm]，且f為光學系統之總焦距[mm]。 Wherein D23 is the distance [mm] of the image side surface of the second lens to the object side surface of the third lens, and f is the total focal length [mm] of the optical system.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]0.6<CT5<1.0 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 0.6 < CT5 < 1.0
其中CT5為第五透鏡之光軸之中心部分的厚度[mm]。 Wherein CT5 is the thickness [mm] of the central portion of the optical axis of the fifth lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]1.7<r4<2.0 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] 1.7 < r4 < 2.0
其中r1為第一透鏡之物側表面之曲率半徑[mm]，且r2為第一透鏡之像側表面之曲率半徑[mm]。 Where r1 is the radius of curvature [mm] of the object side surface of the first lens, and r2 is the radius of curvature [mm] of the image side surface of the first lens.
在本發明的一實施例中，鏡頭模組滿足以下條件表達式，[條件表達式]f2/f>f3/f2 其中f2為第二透鏡之焦距[mm]，f3為第三透鏡之焦距[mm]，且f為光學系統之總焦距[mm]。 In an embodiment of the invention, the lens module satisfies the following conditional expression, [conditional expression] f2/f>f3/f2 Where f2 is the focal length [mm] of the second lens, f3 is the focal length [mm] of the third lens, and f is the total focal length [mm] of the optical system.
10‧‧‧第一透鏡 10‧‧‧ first lens
20‧‧‧第二透鏡 20‧‧‧second lens
30‧‧‧第三透鏡 30‧‧‧ third lens
40‧‧‧第四透鏡 40‧‧‧Fourth lens
50‧‧‧第五透鏡 50‧‧‧ fifth lens
60‧‧‧濾光構件 60‧‧‧ Filter components
70‧‧‧影像感測器 70‧‧‧Image sensor
100‧‧‧鏡頭模組 100‧‧‧ lens module
C-C‧‧‧光軸 C-C‧‧‧ optical axis
S1‧‧‧物側表面 S1‧‧‧ object side surface
S2‧‧‧像側表面 S2‧‧‧ image side surface
S3‧‧‧物側表面 S3‧‧‧Side side surface
S4‧‧‧像側表面 S4‧‧‧ image side surface
S5‧‧‧物側表面 S5‧‧‧ object side surface
S6‧‧‧像側表面 S6‧‧‧ image side surface
S7‧‧‧物側表面 S7‧‧‧ object side surface
S8‧‧‧像側表面 S8‧‧‧ image side surface
S9‧‧‧物側表面 S9‧‧‧Side side surface
S10‧‧‧像側表面 S10‧‧‧ image side surface
S11‧‧‧表面 S11‧‧‧ surface
S12‧‧‧表面 S12‧‧‧ surface
本發明之上述及其他態樣、特徵及其他優點將由以下結合隨附圖式之實施方式而更清楚地理解，其中：圖1為根據本發明之第一例示性實施例之鏡頭模組之視圖；圖2為顯示圖1之鏡頭模組之像差特徵之圖形；圖3為根據本發明之第二例示性實施例之鏡頭模組之視圖；圖4為顯示圖3之鏡頭模組之像差特徵之圖形；圖5為根據本發明之第三例示性實施例之鏡頭模組之視圖；圖6為顯示圖5之鏡頭模組之像差特徵之圖形；圖7為根據本發明之第四例示性實施例之鏡頭模組之視圖；圖8為顯示圖7之鏡頭模組之像差特徵之圖形；圖9為根據本發明之第五例示性實施例之鏡頭模組之視圖；以及圖10為顯示圖9之鏡頭模組之像差特徵之圖形。 The above and other aspects, features, and other advantages of the present invention will be more clearly understood from the embodiments of the accompanying drawings in which: FIG. 1 is a view of a lens module in accordance with a first exemplary embodiment of the present invention. 2 is a view showing an aberration characteristic of the lens module of FIG. 1; FIG. 3 is a view of a lens module according to a second exemplary embodiment of the present invention; and FIG. 4 is a view showing an image of the lens module of FIG. Figure 5 is a view of a lens module according to a third exemplary embodiment of the present invention; Figure 6 is a view showing aberration characteristics of the lens module of Figure 5; Figure 7 is a diagram according to the present invention; 4 is a view of a lens module of the exemplary embodiment; FIG. 8 is a view showing aberration characteristics of the lens module of FIG. 7; FIG. 9 is a view of a lens module according to a fifth exemplary embodiment of the present invention; FIG. 10 is a graph showing aberration characteristics of the lens module of FIG. 9.
在下文中將參照隨附圖式詳細描述本發明之實施例。 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
然而，本發明可以許多不同形式加以體現且不應視為侷限於本文所述之實施例。實際上，提供這些實施例使得本發明全面且完整，且將本發明之範疇充分傳達給熟習此項技術者。 However, the invention may be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
在圖式中，元件之形狀及尺寸可放大以便清楚明瞭，且相同標號將通篇用以表示相同或相似元件。 In the drawings, the shapes and dimensions of the elements may be exaggerated for clarity and the same reference numerals will be used throughout.
圖1為根據本發明之第一例示性實施例之鏡頭模組之視 圖；圖2為顯示圖1之鏡頭模組之像差特徵之圖形；圖3為根據本發明之第二例示性實施例之鏡頭模組之視圖；圖4為顯示圖3之鏡頭模組之像差特徵之圖形；圖5為根據本發明之第三例示性實施例之鏡頭模組之視圖；圖6為顯示圖5之鏡頭模組之像差特徵之圖形；圖7為根據本發明之第四例示性實施例之鏡頭模組之視圖；圖8為顯示圖7之鏡頭模組之像差特徵之圖形；圖9為根據本發明之第五例示性實施例之鏡頭模組之視圖；以及圖10為顯示圖9之鏡頭模組之像差特徵之圖形。 1 is a view of a lens module according to a first exemplary embodiment of the present invention. Figure 2 is a view showing the aberration characteristics of the lens module of Figure 1; Figure 3 is a view of the lens module according to the second exemplary embodiment of the present invention; Figure 4 is a view showing the lens module of Figure 3 FIG. 5 is a view showing a lens module according to a third exemplary embodiment of the present invention; FIG. 6 is a view showing aberration characteristics of the lens module of FIG. 5; 4 is a view showing a lens module of the lens module of FIG. 7; FIG. 9 is a view showing a lens module according to a fifth exemplary embodiment of the present invention; And FIG. 10 is a graph showing the aberration characteristics of the lens module of FIG.
本發明之鏡頭模組100可包括第一透鏡10、第二透鏡20、第三透鏡30、第四透鏡40以及第五透鏡50，且可選擇性更包括孔徑光闌(aperture)及濾光構件60以及影像感測器70。可自物件(亦即待照相之對象或物件)朝向影像(亦即影像感測器)依次安置第一透鏡10至第五透鏡50。 The lens module 100 of the present invention may include a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, and a fifth lens 50, and may further include an aperture aperture and a filter member. 60 and image sensor 70. The first lens 10 to the fifth lens 50 may be disposed in order from the object (ie, the object or object to be photographed) toward the image (ie, the image sensor).
第一透鏡10、第二透鏡20、第三透鏡30、第四透鏡40以及第五透鏡50可均由塑膠形成。因此，當透鏡10、透鏡20、透鏡30、透鏡40以及透鏡50均由塑膠形成時，可減少鏡頭模組100之製造成本且可便利地大量生產鏡頭模組100。此外，當透鏡10、透鏡20、透鏡30、透鏡40以及透鏡50由塑膠形成時，容易加工所述透鏡之物側表面S1、S3、S5、S7及S9及像側表面S2、S4、S6、S8及S10，且因此可形成具有球面或非球面形狀之所述透鏡表面。 The first lens 10, the second lens 20, the third lens 30, the fourth lens 40, and the fifth lens 50 may each be formed of plastic. Therefore, when the lens 10, the lens 20, the lens 30, the lens 40, and the lens 50 are both formed of plastic, the manufacturing cost of the lens module 100 can be reduced and the lens module 100 can be mass-produced conveniently. Further, when the lens 10, the lens 20, the lens 30, the lens 40, and the lens 50 are formed of plastic, it is easy to process the object side surfaces S1, S3, S5, S7, and S9 and the image side surfaces S2, S4, and S6 of the lens. S8 and S10, and thus the lens surface having a spherical or aspherical shape can be formed.
在鏡頭模組100中，第一透鏡10可最接近於物件安置。 In the lens module 100, the first lens 10 can be placed closest to the object.
第一透鏡10可總體上具有正折射能力。此外，第一透鏡10之物側表面S1可為朝向物件之凸面，且其像側表面S2可為凹 面。詳言之，物側表面S1可為凸面且像側表面S2可為凹面。 The first lens 10 may have a positive refractive power as a whole. Further, the object side surface S1 of the first lens 10 may be a convex surface facing the object, and the image side surface S2 may be concave surface. In detail, the object side surface S1 may be a convex surface and the image side surface S2 may be a concave surface.
第一透鏡10之物側表面S1及像側表面S2中之至少一者可為非球面。然而，必要時，第一透鏡10之物側表面S1及像側表面S2可均為非球面。 At least one of the object side surface S1 and the image side surface S2 of the first lens 10 may be aspherical. However, if necessary, the object side surface S1 and the image side surface S2 of the first lens 10 may both be aspherical.
第二透鏡20可安置於第一透鏡10後部(亦即在朝著影像的方向上)。第二透鏡20可總體上具有負折射能力，且可以與第一透鏡10相同的方式由塑膠形成。 The second lens 20 can be disposed at the rear of the first lens 10 (i.e., in the direction toward the image). The second lens 20 may have a negative refractive power as a whole and may be formed of plastic in the same manner as the first lens 10.
第二透鏡20之物側表面S3可為朝向物件之凸面，且其像側表面S4可為朝向影像之凹面。此外，第二透鏡20可具有至少一個非球表面。舉例而言，第二透鏡20之物側表面S3及像側表面S4中之至少一者可為非球面。然而，必要時，第二透鏡20之物側表面S3及像側表面S4可均為非球面。 The object side surface S3 of the second lens 20 may be a convex surface facing the object, and the image side surface S4 may be a concave surface toward the image. Further, the second lens 20 may have at least one aspherical surface. For example, at least one of the object side surface S3 and the image side surface S4 of the second lens 20 may be an aspherical surface. However, if necessary, the object side surface S3 and the image side surface S4 of the second lens 20 may both be aspherical.
第二透鏡20可具有滿足以下數學表達式1之阿貝數。 The second lens 20 may have an Abbe number satisfying the following mathematical expression 1.
[數學表達式1]ν2<40 [mathematical expression 1] ν2<40
此處，υ2為第二透鏡20之阿貝數。 Here, υ 2 is the Abbe number of the second lens 20 .
因此，當第二透鏡20之阿貝數低於40時，可有效校正由第一透鏡10所引起之色差。當第二透鏡20之阿貝數超過40時，可減小第一透鏡10之阿貝數與第二透鏡20之阿貝數之間的差值(一般，第一透鏡10之阿貝數介於50與60之間)，使得藉由第二透鏡20之色差校正效果可能劣化。因此，第二透鏡20可用使其阿貝數低於40的方式製造，如同數學表達式1中一樣。第二透鏡20之阿貝數可為20至30。 Therefore, when the Abbe number of the second lens 20 is lower than 40, the chromatic aberration caused by the first lens 10 can be effectively corrected. When the Abbe number of the second lens 20 exceeds 40, the difference between the Abbe number of the first lens 10 and the Abbe number of the second lens 20 can be reduced (generally, the Abbe number of the first lens 10) Between 50 and 60), the chromatic aberration correction effect by the second lens 20 may be deteriorated. Therefore, the second lens 20 can be manufactured in such a manner that its Abbe number is lower than 40 as in Mathematical Expression 1. The Abbe number of the second lens 20 may be 20 to 30.
第三透鏡30可安置於第二透鏡20之後部。第三透鏡30 可總體上具有正折射能力，且可由塑膠形成。然而，必要時，第三透鏡30可具有負折射能力。 The third lens 30 may be disposed at a rear portion of the second lens 20. Third lens 30 It can have a positive refractive power as a whole and can be formed of plastic. However, the third lens 30 may have a negative refractive power as necessary.
第三透鏡30之物側表面S5可為凹面，且其像側表面S6可為朝向影像之凸面。此處，在一些情況下，第三透鏡30之物側表面S5可為朝向物件之凸面(請參閱圖5中所示之本發明之第三例示性實施例)。 The object side surface S5 of the third lens 30 may be a concave surface, and the image side surface S6 thereof may be a convex surface toward the image. Here, in some cases, the object side surface S5 of the third lens 30 may be a convex surface toward the object (refer to the third exemplary embodiment of the present invention shown in FIG. 5).
同時，如上所述之第二透鏡20及第三透鏡30可滿足數學表達式2。 Meanwhile, the second lens 20 and the third lens 30 as described above can satisfy Mathematical Expression 2.
此處，f2為第二透鏡20之焦距，且f3為第三透鏡30之焦距。 Here, f2 is the focal length of the second lens 20, and f3 is the focal length of the third lens 30.
在鏡頭模組中，若f3/f2之值低於根據數學表達式2之下限，則可增加第二透鏡之折射能力，且因此可能難以製造第二透鏡。同樣地，在鏡頭模組中，若f3/f2之值超過根據數學表達式2之上限，則可增加第三透鏡之折射能力，且因此可能難以製造第三透鏡。 In the lens module, if the value of f3/f2 is lower than the lower limit according to Mathematical Expression 2, the refractive power of the second lens can be increased, and thus it may be difficult to manufacture the second lens. Similarly, in the lens module, if the value of f3/f2 exceeds the upper limit according to Mathematical Expression 2, the refractive power of the third lens can be increased, and thus it may be difficult to manufacture the third lens.
因此，需要滿足數學表達式2之條件以允許大量生產鏡頭模組。 Therefore, it is necessary to satisfy the condition of Mathematical Expression 2 to allow mass production of the lens module.
第四透鏡40可安置於第三透鏡30之後部。第四透鏡40可具有負折射能力，且可由塑膠形成。 The fourth lens 40 may be disposed at a rear portion of the third lens 30. The fourth lens 40 may have a negative refractive power and may be formed of plastic.
第四透鏡40之物側表面S7可為凹面，且其像側表面S8可為朝向影像之凸面。此外，第四透鏡40可總體上具有朝向影像的凸面之彎月形。 The object side surface S7 of the fourth lens 40 may be a concave surface, and the image side surface S8 thereof may be a convex surface toward the image. Further, the fourth lens 40 may have a meniscus shape generally convex toward the image.
第四透鏡40可滿足數學表達式3至數學表達式5。 The fourth lens 40 can satisfy Mathematical Expression 3 to Mathematical Expression 5.
[數學表達式3]20<ν1-ν4<40 [mathematical expression 3] 20<ν1-ν4<40
此處，υ1為第一透鏡之阿貝數，且υ4為第四透鏡之阿貝數。 Here, υ1 is the Abbe number of the first lens, and υ4 is the Abbe number of the fourth lens.
數學表達式3可為關於鏡頭模組之色差的限制條件。亦即，當製造滿足數學表達式3之鏡頭模組時，可藉由第一透鏡10及第四透鏡40來改善色差校正效果。然而，若υ1-υ4之值低於根據數學表達式3之下限，需要使用由玻璃形成之透鏡，且因此可能增加製造鏡頭模組100之單位成本。與此不同，若υ1-υ4之值超過根據數學表達式3之上限，可使色差校正效果劣化，且因此可能難以製造能夠實現高解析度之鏡頭模組。 Mathematical expression 3 can be a constraint on the color difference of the lens module. That is, when the lens module satisfying Mathematical Expression 3 is manufactured, the chromatic aberration correction effect can be improved by the first lens 10 and the fourth lens 40. However, if the value of υ1-υ4 is lower than the lower limit according to Mathematical Expression 3, it is necessary to use a lens formed of glass, and thus it is possible to increase the unit cost of manufacturing the lens module 100. On the other hand, if the value of υ1-υ4 exceeds the upper limit according to Mathematical Expression 3, the chromatic aberration correction effect can be deteriorated, and thus it may be difficult to manufacture a lens module capable of achieving high resolution.
此處，f1為第一透鏡之焦距[mm]，且f4為第四透鏡之焦距[mm]。 Here, f1 is the focal length [mm] of the first lens, and f4 is the focal length [mm] of the fourth lens.
數學表達式4可為限制第四透鏡40之折射能力的限制條件。亦即，若f4/f1之值超過根據數學表達式4之上限，可增加鏡頭模組中第四透鏡40之折射能力，且因此可使鏡頭模組100之解析度劣化或可增加鏡頭模組100之全長(overall length)(亦即光學系統之全長)。 The mathematical expression 4 may be a restriction condition that limits the refractive power of the fourth lens 40. That is, if the value of f4/f1 exceeds the upper limit according to the mathematical expression 4, the refractive power of the fourth lens 40 in the lens module can be increased, and thus the resolution of the lens module 100 can be deteriorated or the lens module can be increased. The overall length of 100 (that is, the full length of the optical system).
此處，f為鏡頭模組之總焦距(overall focal distance)， 且f4為第四透鏡之焦距。 Here, f is the total focal distance of the lens module. And f4 is the focal length of the fourth lens.
數學表達式5可為限制第四透鏡40之折射能力之限制條件，如同數學表達式4。亦即，若f4/f之值超過根據數學表達式5之上限，可增加鏡頭模組中第四透鏡40之(負)折射能力，且因此可使鏡頭模組100之解析度劣化或鏡頭模組之總焦距可變得過小，使得畸變校正(distortion correction)可為困難的(或鏡頭模組之視角(viewing angle)可能過寬，且因此可出現畸變現象)。 The mathematical expression 5 may be a constraint that limits the refractive power of the fourth lens 40, as in Mathematical Expression 4. That is, if the value of f4/f exceeds the upper limit according to Mathematical Expression 5, the (negative) refractive power of the fourth lens 40 in the lens module can be increased, and thus the resolution of the lens module 100 can be deteriorated or the lens mode can be deteriorated. The total focal length of the set may become too small, making distortion correction difficult (or the viewing angle of the lens module may be too wide, and thus distortion may occur).
因此，數學表達式4及數學表達式5可能均需要滿足以便減小鏡頭模組100之全長。 Therefore, both the mathematical expression 4 and the mathematical expression 5 may need to be satisfied in order to reduce the overall length of the lens module 100.
第五透鏡50可安置於第四透鏡40之後部。第五透鏡50可具有負折射能力，且可由塑膠形成。 The fifth lens 50 may be disposed at a rear portion of the fourth lens 40. The fifth lens 50 may have a negative refractive power and may be formed of plastic.
第五透鏡50之物側表面S9在其與光軸(C-C)之交叉點處可為朝向物件之凸面，且在其基於光軸(C-C)之外圍部分(peripheral portion)可為凹面。此外，第五透鏡50之像側表面S10在其與光軸(C-C)之交叉點處可為凹面，且在其基於光軸(C-C)之外圍部分可為凸面。亦即，可在第五透鏡50之物側表面S9及像側表面S10上形成至少一個反曲點(inflection point)。 The object side surface S9 of the fifth lens 50 may be a convex surface toward the object at its intersection with the optical axis (C-C), and may be a concave surface at its peripheral portion based on the optical axis (C-C). Further, the image side surface S10 of the fifth lens 50 may be concave at its intersection with the optical axis (C-C), and may be convex at its peripheral portion based on the optical axis (C-C). That is, at least one inflection point may be formed on the object side surface S9 and the image side surface S10 of the fifth lens 50.
濾光構件60可安置於第五透鏡50之後部。濾光構件60之兩個表面可為平面，且濾光構件60可由除塑膠以外之材料形成。舉例而言，濾光構件60可由玻璃形成。 The filter member 60 may be disposed at a rear portion of the fifth lens 50. The two surfaces of the filter member 60 may be planar, and the filter member 60 may be formed of a material other than plastic. For example, the filter member 60 can be formed of glass.
濾光構件60可阻擋紅外光。為達成此舉，可將紅外光阻擋膜(IR blocking film)附著於濾光構件60之至少一個表面或可使紅外光阻擋層(IR blocking layer)覆蓋於濾光構件60之至少一個表面上。同時，視鏡頭模組100之類型而定，可省略濾光構件 60。 The filter member 60 blocks infrared light. To achieve this, an IR blocking film may be attached to at least one surface of the filter member 60 or an IR blocking layer may be coated on at least one surface of the filter member 60. Meanwhile, depending on the type of the lens module 100, the filter member may be omitted. 60.
影像感測器70可安置於濾光構件60之後部。 The image sensor 70 may be disposed at a rear portion of the filter member 60.
影像感測器70可將入射穿過透鏡10、透鏡20、透鏡30、透鏡40以及透鏡50之物件的影像轉化成電信號。電荷耦合裝置(CCD)、互補金屬-氧化物-半導體(CMOS)或其類似物可用於影像感測器70，且影像感測器70可製造成晶片尺度封裝(chip scale package,CSP)形式。 Image sensor 70 can convert an image of an object incident through lens 10, lens 20, lens 30, lens 40, and lens 50 into an electrical signal. A charge coupled device (CCD), a complementary metal-oxide-semiconductor (CMOS) or the like can be used for the image sensor 70, and the image sensor 70 can be fabricated in the form of a chip scale package (CSP).
孔徑光闌(未圖示)可安置在第一透鏡10前方或介於第一透鏡10與第二透鏡20之間。然而，必要時可省略孔徑光闌。 An aperture stop (not shown) may be disposed in front of or between the first lens 10 and the second lens 20. However, the aperture stop can be omitted if necessary.
如上所述之鏡頭模組100可滿足數學表達式6。 The lens module 100 as described above can satisfy Mathematical Expression 6.
此處，TL為光學系統之全長(自第一透鏡之物側表面S1至影像感測器70之成像表面之長度)，且f為光學系統之總焦距。 Here, TL is the total length of the optical system (the length from the object side surface S1 of the first lens to the imaging surface of the image sensor 70), and f is the total focal length of the optical system.
數學表達式6可為限制鏡頭模組之視角及長度之數值。亦即，若TL/f之值低於根據數學表達式6之下限，可能難以獲得鏡頭模組100之視角。相反地，若TL/f之值超過根據數學表達式6之上限，可增加鏡頭模組100之長度(亦即TL)，且因此可能難以製造具有小尺寸之鏡頭模組100。 Mathematical expression 6 can be a value that limits the angle of view and length of the lens module. That is, if the value of TL/f is lower than the lower limit according to Mathematical Expression 6, it may be difficult to obtain the angle of view of the lens module 100. Conversely, if the value of TL/f exceeds the upper limit according to Mathematical Expression 6, the length of the lens module 100 (i.e., TL) may be increased, and thus it may be difficult to manufacture the lens module 100 having a small size.
同時，第一透鏡10至第四透鏡40之至少一個表面可為非球面。透鏡之非球面係數可藉由使用數學表達式7計算。 Meanwhile, at least one surface of the first lens 10 to the fourth lens 40 may be aspherical. The aspheric coefficient of the lens can be calculated by using Mathematical Expression 7.
此處，c為曲率(1/曲率半徑)，h為透鏡中從中心至特定 位置之半徑，K為圓錐係數(conic coefficient)，A為4次項係數，B為6次項係數，C為8次項係數，D為10次項係數，E為12次項係數，F為14次項係數，且Z為特定位置之垂度(sag)。 Here, c is the curvature (1/curvature radius), h is the center from the lens to the specific The radius of the position, K is the conic coefficient, A is the 4th term coefficient, B is the 6th term coefficient, C is the 8th term coefficient, D is the 10th term coefficient, E is the 12th term coefficient, F is the 14th term coefficient, and Z is the sag of a particular location.
僅供參考，相應例示性實施例之K值、A值、B值、C值、D值、E值以及F值顯示於表2、表4、表6、表8以及表10中。 For reference only, the K value, A value, B value, C value, D value, E value, and F value of the corresponding exemplary embodiments are shown in Table 2, Table 4, Table 6, Table 8, and Table 10.
第二透鏡20及第三透鏡30可另外滿足數學表達式8至數學表達式11。僅供參考，在數學表達式8至數學表達式11中，f為光學系統之總焦距[mm]，f2為第二透鏡之焦距[mm]，f3為第三透鏡之焦距[mm]，r4為第二透鏡之像側表面S4之曲率半徑[mm]，且n2為第二透鏡之折射率。 The second lens 20 and the third lens 30 may additionally satisfy Mathematical Expression 8 to Mathematical Expression 11. For reference only, in Mathematical Expression 8 to Mathematical Expression 11, f is the total focal length [mm] of the optical system, f2 is the focal length [mm] of the second lens, and f3 is the focal length of the third lens [mm], r4 The radius of curvature [mm] of the image side surface S4 of the second lens, and n2 is the refractive index of the second lens.
數學表達式8可為決定第二透鏡20之光功率的數值限制。詳言之，若第二透鏡20之焦距f2低於根據數學表達式8之下限，可能無法適當校正第二透鏡20之成像表面的曲率，且若第二透鏡20之焦距f2超過根據數學表達式8之上限，可能無法適當校正畸變及彗差(coma aberration)。 The mathematical expression 8 can be a numerical limit that determines the optical power of the second lens 20. In detail, if the focal length f2 of the second lens 20 is lower than the lower limit according to Mathematical Expression 8, the curvature of the imaging surface of the second lens 20 may not be properly corrected, and if the focal length f2 of the second lens 20 exceeds according to the mathematical expression At the upper limit of 8, it may not be possible to properly correct distortion and coma aberration.
數學表達式9可為決定第三透鏡30之光功率的數值限制。詳言之，若第三透鏡30之焦距f3低於根據數學表達式9之下限，可增加光學系統之總焦距，使得視角可減小，且若第三透鏡30之焦距f3超過根據數學表達式9之上限，可能無法適當校 正第三透鏡30之成像表面的曲率。 The mathematical expression 9 can be a numerical limit that determines the optical power of the third lens 30. In detail, if the focal length f3 of the third lens 30 is lower than the lower limit according to Mathematical Expression 9, the total focal length of the optical system can be increased, so that the viewing angle can be reduced, and if the focal length f3 of the third lens 30 exceeds according to mathematical expressions The upper limit of 9 may not be properly The curvature of the imaging surface of the positive third lens 30.
數學表達式10可為決定第二透鏡20之像側表面S4之形狀的數值限制。詳言之，若第二透鏡20之像側表面S4的曲率半徑r4低於根據數學表達式10之下限，入射光之角度可能會大，且因此可能難以控制彗差(coma aberration)，且若第二透鏡20之像側表面S4的曲率半徑r4超過根據數學表達式10之上限，可增加成像表面之曲率像差(curvature aberration)。 The mathematical expression 10 may be a numerical limit that determines the shape of the image side surface S4 of the second lens 20. In detail, if the radius of curvature r4 of the image side surface S4 of the second lens 20 is lower than the lower limit according to Mathematical Expression 10, the angle of the incident light may be large, and thus it may be difficult to control the coma aberration, and if The curvature radius r4 of the image side surface S4 of the second lens 20 exceeds the upper limit according to Mathematical Expression 10, and the curvature aberration of the imaging surface can be increased.
[數學表達式11]1.60<n2<2.10 [Mathematical Expression 11] 1.60< n 2<2.10
數學表達式11可為決定色差校正範圍之數值限制。詳言之，若第二透鏡20之折射率n2低於根據數學表達式11之下限，可能無法適當校正光學系統之總色差，且若第二透鏡20之折射率n2超過根據數學表達式11之上限，可適當校正光學系統之色差，但可能增加第二透鏡20之製造成本。 Mathematical expression 11 can be a numerical limit that determines the range of chromatic aberration correction. In detail, if the refractive index n2 of the second lens 20 is lower than the lower limit according to the mathematical expression 11, the total color difference of the optical system may not be properly corrected, and if the refractive index n2 of the second lens 20 exceeds the mathematical expression 11 The upper limit can appropriately correct the chromatic aberration of the optical system, but may increase the manufacturing cost of the second lens 20.
另外，第二透鏡20及第四透鏡40可滿足數學表達式12。亦即，可在滿足數學表達式12之範圍內決定第二透鏡20與第四透鏡40之間的距離。僅供參考，在數學表達式12中，d456為第二透鏡之像側表面S4至第四透鏡之物側表面S6之距離，且f為光學系統之總焦距。 In addition, the second lens 20 and the fourth lens 40 may satisfy the mathematical expression 12. That is, the distance between the second lens 20 and the fourth lens 40 can be determined within the range satisfying the mathematical expression 12. For reference only, in Mathematical Expression 12, d456 is the distance from the image side surface S4 of the second lens to the object side surface S6 of the fourth lens, and f is the total focal length of the optical system.
數學表達式12可為優化第二透鏡20與第四透鏡40之距 離的數值限制。詳言之，若第二透鏡20之像側表面S4與第四透鏡40之物側表面S6之間的距離d456低於根據數學表達式12之下限，可能難以顯示第三透鏡30之成像表面校正效果，且若第二透鏡20之像側表面S4與第四透鏡40之物側表面S6之間的距離d456超過根據數學表達式12之上限，可能增加光學系統之全長。 The mathematical expression 12 may be to optimize the distance between the second lens 20 and the fourth lens 40. The numerical limit of departure. In detail, if the distance d456 between the image side surface S4 of the second lens 20 and the object side surface S6 of the fourth lens 40 is lower than the lower limit according to Mathematical Expression 12, it may be difficult to display the imaging surface correction of the third lens 30. The effect, and if the distance d456 between the image side surface S4 of the second lens 20 and the object side surface S6 of the fourth lens 40 exceeds the upper limit according to Mathematical Expression 12, it is possible to increase the total length of the optical system.
如上述所構建之鏡頭模組100可經由藉由數學表達式1至數學表達式5之數值限制實現高解析度，且可小型化。 The lens module 100 constructed as described above can achieve high resolution via numerical limitation by Mathematical Expression 1 to Mathematical Expression 5, and can be miniaturized.
此外，鏡頭模組100可藉由經由數學表達式4及數學表達式5限制第四透鏡40之焦距來改良鏡頭模組100之亮度。 In addition, the lens module 100 can improve the brightness of the lens module 100 by limiting the focal length of the fourth lens 40 via the mathematical expression 4 and the mathematical expression 5.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.059<CT2/f<0.073 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.059<CT2/f<0.073
其中CT2為第二透鏡20之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Wherein CT2 is the thickness [mm] of the central portion of the optical axis of the second lens 20, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]1.103<|r2/f|<10.611 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 1.103<|r2/f|<10.611
其中r2為第一透鏡10之像側表面S2之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r2 is the radius of curvature [mm] of the image side surface S2 of the first lens 10, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.640<|r9/f|<1.184 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.640<|r9/f|<1.184
其中r9為第五透鏡50之像側表面S10之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r9 is the radius of curvature [mm] of the image side surface S10 of the fifth lens 50, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.800<CT3/f<0.116 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.800<CT3/f<0.116
其中CT3為第三透鏡30之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Wherein CT3 is the thickness [mm] of the central portion of the optical axis of the third lens 30, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.55<|(r5+r6)/(r5-r6)|<2.57 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.55<|(r5+r6)/(r5-r6)|<2.57
其中r5為第三透鏡30之物側表面S5之曲率半徑[mm]，且r6為第三透鏡30之像側表面S6之曲率半徑[mm]。 Where r5 is the radius of curvature [mm] of the object side surface S5 of the third lens 30, and r6 is the radius of curvature [mm] of the image side surface S6 of the third lens 30.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.33<CT3<0.49 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.33<CT3<0.49
其中CT3為第三透鏡30之光軸之中心部分的厚度[mm]。 Wherein CT3 is the thickness [mm] of the central portion of the optical axis of the third lens 30.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]CT5>CT4 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] CT5>CT4
其中CT4為第四透鏡40之光軸之中心部分的厚度[mm]，且CT5為第五透鏡50之光軸之中心部分的厚度[mm]。 Wherein CT4 is the thickness [mm] of the central portion of the optical axis of the fourth lens 40, and CT5 is the thickness [mm] of the central portion of the optical axis of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]1.38<r1<1.64 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 1.38 < r1 < 1.64
其中r1為第一透鏡10之物側表面S1之曲率半徑[mm]。 Where r1 is the radius of curvature [mm] of the object side surface S1 of the first lens 10.
在一實施例中，鏡頭模組100滿足以下條件表達式， [條件表達式]4.64<|r2|<45.10 In an embodiment, the lens module 100 satisfies the following conditional expressions. [Conditional expression] 4.64<|r2|<45.10
其中r2為第一透鏡10之像側表面S2之曲率半徑[mm]。 Where r2 is the radius of curvature [mm] of the image side surface S2 of the first lens 10.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]-1.59<r8<-1.13 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] - 1.59 < r8 < -1.13
其中r8為第四透鏡40之像側表面S8之曲率半徑[mm]。 Where r8 is the radius of curvature [mm] of the image side surface S8 of the fourth lens 40.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]f>f1 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] f>f1
其中f1為第一透鏡10之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f1 is the focal length [mm] of the first lens 10, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]f2>f5 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] f2>f5
其中f2為第二透鏡20之焦距[mm]，且f5為第五透鏡50之焦距[mm]。 Where f2 is the focal length [mm] of the second lens 20, and f5 is the focal length [mm] of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]|f4|>f1 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression]|f4|>f1
其中f1為第一透鏡10之焦距[mm]，且f4為第四透鏡40之焦距[mm]。 Where f1 is the focal length [mm] of the first lens 10, and f4 is the focal length [mm] of the fourth lens 40.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式] |f4|>f3 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] |f4|>f3
其中f3為第三透鏡30之焦距[mm]，且f4為第四透鏡40之焦距[mm]。 Where f3 is the focal length [mm] of the third lens 30, and f4 is the focal length [mm] of the fourth lens 40.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]|f5|>|f1| In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression]|f5|>|f1|
其中f1為第一透鏡10之焦距[mm]，且f5為第五透鏡50之焦距[mm]。 Where f1 is the focal length [mm] of the first lens 10, and f5 is the focal length [mm] of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]|f5|>|f2| In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression]|f5|>|f2|
其中f2為第二透鏡20之焦距[mm]，且f5為第五透鏡50之焦距[mm]。 Where f2 is the focal length [mm] of the second lens 20, and f5 is the focal length [mm] of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]|f4/f|>f3/f In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression]|f4/f|>f3/f
其中f3為第三透鏡30之焦距[mm]，f4為第四透鏡40之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f3 is the focal length [mm] of the third lens 30, f4 is the focal length [mm] of the fourth lens 40, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]|f4/f1|>|f4/f| In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression]|f4/f1|>|f4/f|
其中f1為第一透鏡10之焦距[mm]，f4為第四透鏡40之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f1 is the focal length [mm] of the first lens 10, f4 is the focal length [mm] of the fourth lens 40, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式， [條件表達式]25<|f4|<101 In an embodiment, the lens module 100 satisfies the following conditional expressions. [Conditional expression]25<|f4|<101
其中f4為第四透鏡40之焦距[mm]。 Where f4 is the focal length [mm] of the fourth lens 40.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]2.1<|f4/f5|<17.9 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 2.1<|f4/f5|<17.9
其中f4為第四透鏡40之焦距[mm]，且f5為第五透鏡50之焦距[mm]。 Where f4 is the focal length [mm] of the fourth lens 40, and f5 is the focal length [mm] of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]3.1<|r5/f|<39.9 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 3.1 <|r5/f|<39.9
其中r5為第三透鏡30之物側表面S5之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r5 is the radius of curvature [mm] of the object side surface S5 of the third lens 30, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.07<CT4/f<0.11 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.07 < CT4 / f < 0.11
其中CT4為第四透鏡40之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Wherein CT4 is the thickness [mm] of the central portion of the optical axis of the fourth lens 40, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]1.6<r3/r4<2.4 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 1.6 < r3 / r4 < 2.4
其中r3為第二透鏡20之物側表面S3之曲率半徑[mm]，且r4為第二透鏡20之像側表面S4之曲率半徑[mm]。 Wherein r3 is the radius of curvature [mm] of the object side surface S3 of the second lens 20, and r4 is the radius of curvature [mm] of the image side surface S4 of the second lens 20.
在一實施例中，鏡頭模組100滿足以下條件表達式， [條件表達式]1.58<r9/r10<2.71 In an embodiment, the lens module 100 satisfies the following conditional expressions. [Conditional expression] 1.58<r9/r10<2.71
其中r9為第五透鏡50之物側表面S9之曲率半徑[mm]，且r10為第五透鏡50之像側表面S10之曲率半徑[mm]。 Where r9 is the radius of curvature [mm] of the object side surface S9 of the fifth lens 50, and r10 is the radius of curvature [mm] of the image side surface S10 of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]2.1<(r9+r10)/(r9-r10)<4.5 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 2.1 < (r9 + r10) / (r9 - r10) < 4.5
其中r9為第五透鏡50之物側表面S9之曲率半徑[mm]，且r10為第五透鏡50之像側表面S10之曲率半徑[mm]。 Where r9 is the radius of curvature [mm] of the object side surface S9 of the fifth lens 50, and r10 is the radius of curvature [mm] of the image side surface S10 of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]2.4<(r3+r4)/(r3-r4)<3.9 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 2.4 < (r3 + r4) / (r3 - r4) < 3.9
其中r3為第二透鏡20之物側表面S3之曲率半徑[mm]，且r4為第二透鏡20之像側表面S4之曲率半徑[mm]。 Wherein r3 is the radius of curvature [mm] of the object side surface S3 of the second lens 20, and r4 is the radius of curvature [mm] of the image side surface S4 of the second lens 20.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.16<D34<0.44 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.16 < D34 < 0.44
其中D34為第三透鏡30之像側表面S6至第四透鏡40之物側表面S7的距離[mm]。 Wherein D34 is a distance [mm] of the image side surface S6 of the third lens 30 to the object side surface S7 of the fourth lens 40.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.33<CT4<0.45 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.33<CT4<0.45
其中CT4為第四透鏡40之光軸之中心部分的厚度[mm]。在一實施例中，鏡頭模組100滿足以下條件表達式， [條件表達式]-1.3<r7<-0.9 Wherein CT4 is the thickness [mm] of the central portion of the optical axis of the fourth lens 40. In an embodiment, the lens module 100 satisfies the following conditional expressions. [Conditional expression]-1.3<r7<-0.9
其中r7為第四透鏡40之物側表面S7之曲率半徑[mm]。 Where r7 is the radius of curvature [mm] of the object side surface S7 of the fourth lens 40.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]2.6<r9<5.0 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 2.6 < r9 < 5.0
其中r9為第五透鏡50之物側表面S9之曲率半徑[mm]。 Where r9 is the radius of curvature [mm] of the object side surface S9 of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]|f5|>|f3| In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression]|f5|>|f3|
其中f3為第三透鏡30之焦距[mm]，且f5為第五透鏡50之焦距[mm]。 Where f3 is the focal length [mm] of the third lens 30, and f5 is the focal length [mm] of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]4.1<f<4.3 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 4.1 < f < 4.3
其中f為光學系統之總焦距[mm]。 Where f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.3<r1/f<0.4 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.3 < r1/f < 0.4
其中r1為第一透鏡10之物側表面S1之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r1 is the radius of curvature [mm] of the object side surface S1 of the first lens 10, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.24<CT2<0.32 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.24 < CT2 < 0.32
其中CT2為第二透鏡20之光軸之中心部分的厚度[mm]。 Wherein CT2 is the thickness [mm] of the central portion of the optical axis of the second lens 20.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.4<f/f3<1.0 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.4<f/f3<1.0
其中f3為第三透鏡30之焦距[mm]，且f為光學系統之總焦距[mm]。 Where f3 is the focal length [mm] of the third lens 30, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.4<r4/f<0.5 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.4 < r4 / f < 0.5
其中r4為第二透鏡20之像側表面S4之曲率半徑[mm]，且f為光學系統之總焦距[mm]。 Where r4 is the radius of curvature [mm] of the image side surface S4 of the second lens 20, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.15<CT5/f<0.24 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.15<CT5/f<0.24
其中CT5為第五透鏡50之光軸之中心部分的厚度[mm]，且f為光學系統之總焦距[mm]。 Wherein CT5 is the thickness [mm] of the central portion of the optical axis of the fifth lens 50, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.03<|r1/r2|<0.31 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.03<|r1/r2|<0.31
其中r1為第一透鏡10之物側表面S1之曲率半徑[mm]，且r2為第一透鏡10之像側表面S2之曲率半徑[mm]。 Where r1 is the radius of curvature [mm] of the object side surface S1 of the first lens 10, and r2 is the radius of curvature [mm] of the image side surface S2 of the first lens 10.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.3<D23<0.5 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.3 < D23 < 0.5
其中D23為第二透鏡20之像側表面S4至第三透鏡30之物側表面S5的距離[mm]。 Wherein D23 is a distance [mm] of the image side surface S4 of the second lens 20 to the object side surface S5 of the third lens 30.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.08<D23/f<0.12 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.08<D23/f<0.12
其中D23為第二透鏡20之像側表面S4至第三透鏡30之物側表面S5的距離[mm]，且f為光學系統之總焦距[mm]。 Wherein D23 is the distance [mm] of the image side surface S4 of the second lens 20 to the object side surface S5 of the third lens 30, and f is the total focal length [mm] of the optical system.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]0.6<CT5<1.0 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 0.6 < CT5 < 1.0
其中CT5為第五透鏡50之光軸之中心部分的厚度[mm]。 Wherein CT5 is the thickness [mm] of the central portion of the optical axis of the fifth lens 50.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]1.7<r4<2.0 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] 1.7 < r4 < 2.0
其中r1為第一透鏡10之物側表面S1之曲率半徑[mm]，且r2為第一透鏡10之像側表面S2之曲率半徑[mm]。 Where r1 is the radius of curvature [mm] of the object side surface S1 of the first lens 10, and r2 is the radius of curvature [mm] of the image side surface S2 of the first lens 10.
在一實施例中，鏡頭模組100滿足以下條件表達式，[條件表達式]f2/f>f3/f2 其中f2為第二透鏡20之焦距[mm]，f3為第三透鏡30之焦距[mm]，且f為光學系統之總焦距[mm]。 In an embodiment, the lens module 100 satisfies the following conditional expression, [conditional expression] f2/f>f3/f2 Where f2 is the focal length [mm] of the second lens 20, f3 is the focal length [mm] of the third lens 30, and f is the total focal length [mm] of the optical system.
下表1至表10顯示具有上述構造之鏡頭模組100之若干例示性實施例中的數值。僅供參考，在本說明書中，焦距、曲率半徑、厚度以及距離中之每一者的單位為毫米(mm)。 Tables 1 through 10 below show numerical values in several exemplary embodiments of the lens module 100 having the above configuration. For reference only, in the present specification, the unit of each of the focal length, the radius of curvature, the thickness, and the distance is millimeter (mm).
(第一例示性實施例) (First Exemplary Embodiment)
根據本發明之第一例示性實施例的鏡頭模組100將參照圖1及圖2加以描述。 The lens module 100 according to the first exemplary embodiment of the present invention will be described with reference to FIGS. 1 and 2.
根據第一例示性實施例之鏡頭模組100可包括具有正折射能力之第一透鏡10、具有負折射能力之第二透鏡20、具有正折射能力之第三透鏡30、具有負折射能力之第四透鏡40以及具有負折射能力之第五透鏡50。 The lens module 100 according to the first exemplary embodiment may include a first lens 10 having positive refractive power, a second lens 20 having negative refractive power, a third lens 30 having positive refractive power, and a negative refractive power The four lens 40 and the fifth lens 50 having a negative refractive power.
在本例示性實施例之鏡頭模組100中，第一透鏡10之焦距f1為2.91mm；第二透鏡20之焦距f2為-5.68mm；第三透鏡30之焦距f3為8.44mm；第四透鏡40之焦距f4為-25.61mm；第五透鏡50之焦距f5為-12.01mm；總焦距f為4.12mm；且光圈數(F Number；F No.)為2.40。同時，根據本例示性實施例之光學系統之全長TL為4.77mm，在隨附例示性實施例連同第二例示性實施例中為最小。 In the lens module 100 of the exemplary embodiment, the focal length f1 of the first lens 10 is 2.91 mm; the focal length f2 of the second lens 20 is -5.68 mm; the focal length f3 of the third lens 30 is 8.44 mm; the fourth lens The focal length f4 of 40 is -25.61 mm; the focal length f5 of the fifth lens 50 is -12.01 mm; the total focal length f is 4.12 mm; and the number of apertures (F Number; F No.) is 2.40. Meanwhile, the total length TL of the optical system according to the present exemplary embodiment is 4.77 mm, which is the smallest in the accompanying exemplary embodiment together with the second exemplary embodiment.
(第二例示性實施例) (Second exemplary embodiment)
根據本發明之第二例示性實施例的鏡頭模組100將參照圖3及圖4加以描述。 The lens module 100 according to the second exemplary embodiment of the present invention will be described with reference to FIGS. 3 and 4.
根據第二例示性實施例之鏡頭模組100可包括具有正折射能力之第一透鏡10、具有負折射能力之第二透鏡20、具有正折射能力之第三透鏡30、具有負折射能力之第四透鏡40以及具有負折射能力之第五透鏡50。 The lens module 100 according to the second exemplary embodiment may include a first lens 10 having positive refractive power, a second lens 20 having negative refractive power, a third lens 30 having positive refractive power, and a negative refractive power The four lens 40 and the fifth lens 50 having a negative refractive power.
在本例示性實施例之鏡頭模組100中，第一透鏡10之焦距f1為2.86mm；第二透鏡20之焦距f2為-5.50mm；第三透鏡30之焦距f3為7.85mm；第四透鏡40之焦距f4為-100.00mm；第五透鏡50之焦距f5為-8.24mm；總焦距f為4.12mm；且光圈 數為2.40。此外，根據本例示性實施例之TL為4.77，連同第一例示性實施例為最小。 In the lens module 100 of the exemplary embodiment, the focal length f1 of the first lens 10 is 2.86 mm; the focal length f2 of the second lens 20 is -5.50 mm; the focal length f3 of the third lens 30 is 7.85 mm; the fourth lens The focal length f4 of 40 is -100.00 mm; the focal length f5 of the fifth lens 50 is -8.24 mm; the total focal length f is 4.12 mm; and the aperture The number is 2.40. Further, the TL according to the present exemplary embodiment is 4.77, which is the smallest along with the first exemplary embodiment.
(第三例示性實施例) (Third exemplary embodiment)
根據本發明之第三例示性實施例的鏡頭模組100將參照圖5及6加以描述。 The lens module 100 according to the third exemplary embodiment of the present invention will be described with reference to FIGS. 5 and 6.
根據第三例示性實施例之鏡頭模組100可包括具有正折射能力之第一透鏡10、具有負折射能力之第二透鏡20、具有正折射能力之第三透鏡30、具有負折射能力之第四透鏡40以及具有負折射能力之第五透鏡50。 The lens module 100 according to the third exemplary embodiment may include a first lens 10 having positive refractive power, a second lens 20 having negative refractive power, a third lens 30 having positive refractive power, and a negative refractive power The four lens 40 and the fifth lens 50 having a negative refractive power.
此處，第三透鏡30之物側表面S5可為朝向物件之凸面，其與其他例示性實施例不同。此外，第四透鏡40可如圖5中所示在基於光軸(C-C)之外圍部分具有反曲點。 Here, the object side surface S5 of the third lens 30 may be a convex surface facing the object, which is different from other exemplary embodiments. Further, the fourth lens 40 may have an inflection point at a peripheral portion based on the optical axis (C-C) as shown in FIG. 5.
在本例示性實施例之鏡頭模組100中，第一透鏡10之焦距f1為3.23mm；第二透鏡20之焦距f2為-5.85mm；第三透鏡30之焦距f3為5.46mm；第四透鏡40之焦距f4為-100.00mm；第五透鏡50之焦距f5為-6.31mm；且總焦距f為4.16mm。此外，本例示性實施例之光圈數為2.20，其比第一及第二例示性實施例亮。然而，根據本例示性實施例之TL為4.87，其略大於第一例示性實施例及第二例示性實施例。 In the lens module 100 of the exemplary embodiment, the focal length f1 of the first lens 10 is 3.23 mm; the focal length f2 of the second lens 20 is -5.85 mm; the focal length f3 of the third lens 30 is 5.46 mm; the fourth lens The focal length f4 of 40 is -100.00 mm; the focal length f5 of the fifth lens 50 is -6.31 mm; and the total focal length f is 4.16 mm. Further, the number of apertures of the present exemplary embodiment is 2.20, which is brighter than the first and second exemplary embodiments. However, the TL according to the present exemplary embodiment is 4.87, which is slightly larger than the first exemplary embodiment and the second exemplary embodiment.
(第四例示性實施例) (Fourth exemplary embodiment)
根據本發明之第四例示性實施例的鏡頭模組100將參照圖7及8加以描述。 The lens module 100 according to the fourth exemplary embodiment of the present invention will be described with reference to FIGS. 7 and 8.
根據第四例示性實施例之鏡頭模組100可包括具有正折射能力之第一透鏡10、具有負折射能力之第二透鏡20、具有正折射能力之第三透鏡30、具有負折射能力之第四透鏡40以及具有負折射能力之第五透鏡50。 The lens module 100 according to the fourth exemplary embodiment may include a first lens 10 having positive refractive power, a second lens 20 having negative refractive power, a third lens 30 having positive refractive power, and a negative refractive power The four lens 40 and the fifth lens 50 having a negative refractive power.
此處，第四透鏡40可在其基於光軸(C-C)之外圍部分具有反曲點，其如同第三例示性實施例。 Here, the fourth lens 40 may have an inflection point at its peripheral portion based on the optical axis (C-C) as it is in the third exemplary embodiment.
在本例示性實施例之鏡頭模組100中，第一透鏡10之焦距f1為3.52mm；第二透鏡20之焦距f2為-7.55mm；第三透鏡30之焦距f3為4.46mm；第四透鏡40之焦距f4為-95.01mm；第五透鏡50之焦距f5為-5.32mm；且總焦距f為4.21mm。此外，根據本例示性實施例之光圈數及TL分別為2.20及4.87。本例示性實施例之光圈數較低，其與第三例示性實施例之情況類似，但根據本例示性實施例之TL與第一例示性實施例及第二例示性實施例之TL相比略大。 In the lens module 100 of the exemplary embodiment, the focal length f1 of the first lens 10 is 3.52 mm; the focal length f2 of the second lens 20 is -7.55 mm; the focal length f3 of the third lens 30 is 4.46 mm; the fourth lens The focal length f4 of 40 is -95.01 mm; the focal length f5 of the fifth lens 50 is -5.32 mm; and the total focal length f is 4.21 mm. Further, the number of apertures and TL according to the present exemplary embodiment are 2.20 and 4.87, respectively. The number of apertures of the present exemplary embodiment is relatively low, which is similar to the case of the third exemplary embodiment, but the TL according to the present exemplary embodiment is compared with the TL of the first exemplary embodiment and the second exemplary embodiment. Slightly larger.
(第五例示性實施例) (Fifth exemplary embodiment)
根據本發明之第五例示性實施例的鏡頭模組100將參照圖9及10加以描述。 The lens module 100 according to the fifth exemplary embodiment of the present invention will be described with reference to FIGS. 9 and 10.
根據第五例示性實施例之鏡頭模組100可包括具有正折射能力之第一透鏡10、具有負折射能力之第二透鏡20、具有正折射能力之第三透鏡30、具有負折射能力之第四透鏡40以及具有負折射能力之第五透鏡50。 The lens module 100 according to the fifth exemplary embodiment may include a first lens 10 having positive refractive power, a second lens 20 having negative refractive power, a third lens 30 having positive refractive power, and a negative refractive power The four lens 40 and the fifth lens 50 having a negative refractive power.
在本例示性實施例之鏡頭模組100中，第一透鏡10之焦距f1為3.09mm；第二透鏡20之焦距f2為-5.56mm；第三透鏡30之焦距f3為7.41mm；第四透鏡40之焦距f4為-91.69mm；第五透鏡50之焦距f5為-8.34mm；且總焦距f為4.25mm。此外，本例示性實施例之光圈數為2.20，其與第一例示性實施例及第二例示性實施例相比較亮，但根據本例示性實施例之TL為5.05，在隨附例示性實施例中為最大。 In the lens module 100 of the exemplary embodiment, the focal length f1 of the first lens 10 is 3.09 mm; the focal length f2 of the second lens 20 is -5.56 mm; the focal length f3 of the third lens 30 is 7.41 mm; the fourth lens The focal length f4 of 40 is -91.69 mm; the focal length f5 of the fifth lens 50 is -8.34 mm; and the total focal length f is 4.25 mm. Further, the number of apertures of the present exemplary embodiment is 2.20, which is brighter than the first exemplary embodiment and the second exemplary embodiment, but the TL according to the present exemplary embodiment is 5.05, which is exemplarily implemented In the example, it is the largest.
表11及12顯示上述例示性實施例之主要數值。 Tables 11 and 12 show the main numerical values of the above exemplary embodiments.
如表11中所示，上述第一例示性實施例至第五例示性實施例均可滿足根據數學表達式1至數學表達式5之數值限制。此外，上述第一例示性實施例至第五例示性實施例均可滿足表12中所示之參數。 As shown in Table 11, the above-described first exemplary embodiment to fifth exemplary embodiment can satisfy the numerical limitation according to Mathematical Expression 1 to Mathematical Expression 5. Further, the above-described first exemplary embodiment to fifth exemplary embodiment can satisfy the parameters shown in Table 12.
此處，第一例示性實施例及第二例示性實施例可提供比其他例示性實施例相對較小的TL，而第三例示性實施例至第五例示性實施例可提供比其他例示性實施例相對較亮的鏡頭模組。 Here, the first exemplary embodiment and the second exemplary embodiment may provide relatively smaller TLs than other exemplary embodiments, while the third exemplary embodiment to the fifth exemplary embodiment may provide more illustrative examples. Embodiments are relatively bright lens modules.
如上所述，可提供能夠實現高解析度照相機及明亮光學系統之鏡頭模組。 As described above, a lens module capable of realizing a high-resolution camera and a bright optical system can be provided.
雖然已結合例示性實施例顯示且描述本發明，但可在不悖離如隨附申請專利範圍所界定之本發明之精神及範疇下進行修改及變化，其應對熟習此項技術者顯而易見。 While the invention has been shown and described with reference to the embodiments of the embodiments of the present invention, the modifications and variations of the invention may be made without departing from the spirit and scope of the invention.
10‧‧‧第一透鏡 10‧‧‧ first lens
20‧‧‧第二透鏡 20‧‧‧second lens
30‧‧‧第三透鏡 30‧‧‧ third lens
40‧‧‧第四透鏡 40‧‧‧Fourth lens
50‧‧‧第五透鏡 50‧‧‧ fifth lens
60‧‧‧濾光構件 60‧‧‧ Filter components
70‧‧‧影像感測器 70‧‧‧Image sensor
100‧‧‧鏡頭模組 100‧‧‧ lens module
C-C‧‧‧光軸 C-C‧‧‧ optical axis
S1‧‧‧物側表面 S1‧‧‧ object side surface
S2‧‧‧像側表面 S2‧‧‧ image side surface
S3‧‧‧物側表面 S3‧‧‧Side side surface
S4‧‧‧像側表面 S4‧‧‧ image side surface
S5‧‧‧物側表面 S5‧‧‧ object side surface
S6‧‧‧像側表面 S6‧‧‧ image side surface
S7‧‧‧物側表面 S7‧‧‧ object side surface
S8‧‧‧像側表面 S8‧‧‧ image side surface
S9‧‧‧物側表面 S9‧‧‧Side side surface
S10‧‧‧像側表面 S10‧‧‧ image side surface
S11‧‧‧表面 S11‧‧‧ surface
S12‧‧‧表面 S12‧‧‧ surface
Claims (43)
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| TW102144927A TWI500962B (en) | 2013-12-06 | 2013-12-06 | Lens module |
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| TW102144927A TWI500962B (en) | 2013-12-06 | 2013-12-06 | Lens module |
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| TWI500962B true TWI500962B (en) | 2015-09-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201248187A (en) * | 2012-06-26 | 2012-12-01 | Largan Precision Co Ltd | Single focus optical image capturing system |
| TW201326884A (en) * | 2013-03-05 | 2013-07-01 | Largan Precision Co Ltd | Image capturing system |
| TW201333517A (en) * | 2013-03-20 | 2013-08-16 | Largan Precision Co Ltd | Imaging lens assembly |
| TW201341840A (en) * | 2013-02-06 | 2013-10-16 | 玉晶光電股份有限公司 | Optical imaging lens and electronic device comprising the same |
| TW201348732A (en) * | 2013-04-12 | 2013-12-01 | 玉晶光電股份有限公司 | Optical imaging lens and electronic device comprising the same |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201248187A (en) * | 2012-06-26 | 2012-12-01 | Largan Precision Co Ltd | Single focus optical image capturing system |
| TW201341840A (en) * | 2013-02-06 | 2013-10-16 | 玉晶光電股份有限公司 | Optical imaging lens and electronic device comprising the same |
| TW201326884A (en) * | 2013-03-05 | 2013-07-01 | Largan Precision Co Ltd | Image capturing system |
| TW201333517A (en) * | 2013-03-20 | 2013-08-16 | Largan Precision Co Ltd | Imaging lens assembly |
| TW201348732A (en) * | 2013-04-12 | 2013-12-01 | 玉晶光電股份有限公司 | Optical imaging lens and electronic device comprising the same |
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