TWI704386B - Image capturing apparatus - Google Patents
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- TWI704386B TWI704386B TW108104995A TW108104995A TWI704386B TW I704386 B TWI704386 B TW I704386B TW 108104995 A TW108104995 A TW 108104995A TW 108104995 A TW108104995 A TW 108104995A TW I704386 B TWI704386 B TW I704386B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/14—Vascular patterns
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Abstract
Description
本發明是有關於一種電子裝置，且特別是有關於一種取像裝置。The invention relates to an electronic device, and more particularly to an image capturing device.
現今市面上電子裝置的生物辨識系統大多採用電容原理，其雖可降低電子裝置的體積，但複雜的電路結構導致製作成本居高不下，因而造成產品單價偏高不易普及。目前雖有採用光學成像原理的生物辨識系統(如指紋辨識、掌紋辨識或靜脈辨識等)，但現有的光學成像系統存在體積過大的問題，使電子裝置不易微型化與薄型化，因而降低電子裝置的可攜性。因此，如何降低電子裝置中光學成像系統體積，同時維持良好光學成像品質，便成為目前業界研發的重要目標。Most of the biometric identification systems of electronic devices on the market today use the capacitance principle. Although it can reduce the size of the electronic device, the complicated circuit structure leads to high manufacturing costs, which makes the product unit price high and difficult to popularize. Although there are biometric systems that use optical imaging principles (such as fingerprint recognition, palmprint recognition or vein recognition, etc.), the existing optical imaging system has the problem of being too large, making the electronic device difficult to miniaturize and thin, and thus reducing the size of the electronic device Portability. Therefore, how to reduce the volume of the optical imaging system in the electronic device while maintaining good optical imaging quality has become an important goal of the industry's current research and development.
本發明提供一種取像裝置，其可實現薄型化並同時維持良好的光學成像品質。The present invention provides an image capturing device, which can realize thinning while maintaining good optical imaging quality.
本發明的一種取像裝置包括由物側至像側沿光軸依序排列的蓋板、第一透鏡、第二透鏡、第三透鏡以及感測器。取像裝置中透鏡的數量僅為三。取像裝置滿足：f/imgH ＜ 0.45以及2 ＜ (OTL-d)/imgH ＜ 9，其中f為取像裝置的有效焦距，imgH為取像裝置的最大成像高度，OTL為待測物至成像面在光軸上的距離，且d為蓋板的厚度。An image capturing device of the present invention includes a cover plate, a first lens, a second lens, a third lens, and a sensor that are sequentially arranged along the optical axis from the object side to the image side. The number of lenses in the imaging device is only three. The imaging device satisfies: f/imgH <0.45 and 2 <(OTL-d)/imgH <9, where f is the effective focal length of the imaging device, imgH is the maximum imaging height of the imaging device, and OTL is the object to be measured to the imaging The distance of the surface on the optical axis, and d is the thickness of the cover plate.
在本發明的一實施例中，第一透鏡、第二透鏡以及第三透鏡的屈光力依序為負、正以及負。第一透鏡、第二透鏡以及第三透鏡各具有物側面以及一像側面。第一透鏡的物側面、第一透鏡的像側面、第二透鏡的物側面、第二透鏡的像側面、第三透鏡的物側面以及第三透鏡的像側面皆為非球面。取像裝置更包括設置於第一透鏡與第二透鏡之間的光圈。In an embodiment of the present invention, the refractive powers of the first lens, the second lens, and the third lens are negative, positive, and negative in order. The first lens, the second lens and the third lens each have an object side surface and an image side surface. The object side surface of the first lens, the image side surface of the first lens, the object side surface of the second lens, the image side surface of the second lens, the object side surface of the third lens, and the image side surface of the third lens are all aspherical. The image capturing device further includes an aperture arranged between the first lens and the second lens.
在本發明的一實施例中，取像裝置更滿足(OTL-d) ＜ 3.5 mm。In an embodiment of the present invention, the image capturing device satisfies (OTL-d) <3.5 mm.
在本發明的一實施例中，第一透鏡的折射率為N1，第二透鏡的折射率為N2，第三透鏡的折射率為N3，且取像裝置更滿足4.5 ＜ N1+N2+N3 ＜ 5.4。In an embodiment of the present invention, the refractive index of the first lens is N1, the refractive index of the second lens is N2, and the refractive index of the third lens is N3, and the imaging device satisfies 4.5 <N1+N2+N3 < 5.4.
在本發明的一實施例中，第一透鏡的色散係數為V1，第二透鏡的色散係數為V2，第三透鏡的色散係數為V3，且取像裝置更滿足V1+V2+V3 ＜ 75。In an embodiment of the present invention, the dispersion coefficient of the first lens is V1, the dispersion coefficient of the second lens is V2, and the dispersion coefficient of the third lens is V3, and the image capturing device further satisfies V1+V2+V3<75.
在本發明的一實施例中，取像裝置的入瞳孔徑為EPD，且取像裝置更滿足f/EPD ＜ 3.7。In an embodiment of the present invention, the entrance pupil aperture of the imaging device is EPD, and the imaging device satisfies f/EPD <3.7.
在本發明的一實施例中，第一透鏡的焦距為f1，第二透鏡的焦距為f2，第三透鏡的焦距為f3，且取像裝置更滿足
在本發明的一實施例中，取像裝置的視場角為FOV，且取像裝置更滿足100˚ ＜ FOV ＜ 180˚。In an embodiment of the present invention, the angle of view of the image capturing device is FOV, and the image capturing device satisfies 100˚<FOV<180˚.
在本發明的一實施例中，第三透鏡的像側面至成像面在光軸上的距離大於0.29 mm。In an embodiment of the present invention, the distance on the optical axis from the image side surface of the third lens to the imaging surface is greater than 0.29 mm.
在本發明的一實施例中，取像裝置更包括設置在蓋板下方的光源，且光源的波長介於400奈米至600奈米之間。In an embodiment of the present invention, the image capturing device further includes a light source disposed under the cover plate, and the wavelength of the light source is between 400 nm and 600 nm.
在本發明的一實施例中，取像裝置還包括設置在顯示面板下方的紅外光光源。In an embodiment of the present invention, the image capturing device further includes an infrared light source arranged under the display panel.
在本發明的一實施例中，蓋板包括指壓板、顯示面板、觸控顯示面板或上述至少兩個的組合。In an embodiment of the present invention, the cover plate includes a finger pressure plate, a display panel, a touch display panel, or a combination of at least two of the foregoing.
在本發明的一實施例中，固定件將顯示面板固定在載體上。In an embodiment of the present invention, the fixing member fixes the display panel on the carrier.
在本發明的一實施例中，固定件為黏著材料。In an embodiment of the present invention, the fixing member is an adhesive material.
在本發明的一實施例中，黏著材料填充於第一透鏡與第二透鏡之間、第二透鏡與第三透鏡之間以及第三透鏡與感測器之間。In an embodiment of the present invention, the adhesive material is filled between the first lens and the second lens, between the second lens and the third lens, and between the third lens and the sensor.
在本發明的一實施例中，黏著材料填充於顯示面板與第一透鏡之間、第一透鏡與第二透鏡之間、第二透鏡與第三透鏡之間以及第三透鏡與感測器之間。In an embodiment of the present invention, the adhesive material is filled between the display panel and the first lens, between the first lens and the second lens, between the second lens and the third lens, and between the third lens and the sensor. between.
在本發明的一實施例中，黏著材料填充於顯示面板與第一透鏡之間、第一透鏡與第二透鏡之間、第二透鏡與第三透鏡之間以及第三透鏡與感測器之間。In an embodiment of the present invention, the adhesive material is filled between the display panel and the first lens, between the first lens and the second lens, between the second lens and the third lens, and between the third lens and the sensor. between.
在本發明的一實施例中，載體包括容置空間，封裝組件容置於容置空間內。In an embodiment of the present invention, the carrier includes an accommodation space, and the packaging component is accommodated in the accommodation space.
在本發明的一實施例中，載體包括容置空間，顯示面板與封裝組件容置於容置空間內。In an embodiment of the present invention, the carrier includes an accommodation space, and the display panel and the packaging component are accommodated in the accommodation space.
基於上述，本發明的實施例的取像裝置的有益效果在於：藉由設置蓋板以及三個透鏡的光學參數設計與排列，使取像裝置更容易製造，且在縮減厚度的同時仍具備能夠克服像差的光學性能。因此，取像裝置在實現薄型化的同時能維持良好的成像品質。Based on the above, the beneficial effect of the imaging device of the embodiment of the present invention is that by setting the cover plate and the optical parameter design and arrangement of the three lenses, the imaging device is easier to manufacture, and the thickness is reduced while still having the ability to Optical performance to overcome aberrations. Therefore, the imaging device can maintain good image quality while achieving thinner profile.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.
實施方式中所提到的方向用語，例如：「上」、「下」、「前」、「後」、「左」、「右」等，僅是參考附圖的方向。因此，使用的方向用語是用來說明，而並非用來限制本發明。在附圖中，各圖式繪示的是特定示範實施例中所使用的方法、結構及/或材料的通常性特徵。然而，這些圖式不應被解釋為界定或限制由這些示範實施例所涵蓋的範圍或性質。舉例來說，為了清楚起見，各膜層、區域及/或結構的相對厚度及位置可能縮小或放大。The directional terms mentioned in the embodiments, such as "up", "down", "front", "rear", "left", "right", etc., are only directions with reference to the drawings. Therefore, the directional terms used are used to illustrate, but not to limit the present invention. In the drawings, each drawing depicts the general features of methods, structures, and/or materials used in specific exemplary embodiments. However, these drawings should not be interpreted as defining or limiting the scope or nature covered by these exemplary embodiments. For example, for clarity, the relative thickness and position of each layer, region, and/or structure may be reduced or enlarged.
在實施方式中，相同或相似的元件將採用相同或相似的標號，且將省略其贅述。此外，不同示範實施例中的特徵在沒有衝突的情況下可相互組合，且依本說明書或申請專利範圍所作之簡單的等效變化與修飾，皆仍屬本專利涵蓋之範圍內。另外，本說明書或申請專利範圍中提及的「第一」、「第二」等用語僅用以命名分立（discrete）的元件或區別不同實施例或範圍，而並非用來限制元件數量上的上限或下限，也並非用以限定元件的製造順序或設置順序。In the embodiments, the same or similar elements will use the same or similar reference numerals, and the redundant description will be omitted. In addition, the features in different exemplary embodiments can be combined without conflict, and simple equivalent changes and modifications made in accordance with this specification or the scope of the patent application still fall within the scope of this patent. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name discrete components or to distinguish different embodiments or ranges, and are not used to limit the number of components. The upper limit or lower limit is not used to limit the manufacturing sequence or the arrangement sequence of the components.
在實施方式中，各取像裝置適於擷取待測物的生物特徵。舉例而言，當待測物為手指時，生物特徵可為指紋或靜脈。當待測物為手掌時，生物特徵可為掌紋。In an embodiment, each image capturing device is suitable for capturing the biological characteristics of the test object. For example, when the test object is a finger, the biometric feature can be a fingerprint or a vein. When the test object is a palm, the biological feature may be palm prints.
圖1是依照本發明的第一實施例的一種取像裝置的示意圖。請參照圖1，本發明的第一實施例的取像裝置100包括由物側至像側沿光軸I依序排列的蓋板101、第一透鏡102、光圈103、第二透鏡104、第三透鏡105以及感測器106。所述物側為待測物10的所在側，而所述像側為成像面S9的所在側。在本揭露中，成像面S9即取像裝置100中感測器106的感測面。來自待測物10的成像光束(即帶有生物特徵資訊的光束，如成像光束B1及成像光束B2)進入取像裝置100時，會依序通過蓋板101、第一透鏡102、光圈103、第二透鏡104以及第三透鏡105，然後傳遞至感測器106的感側面(即成像面S9)，而在成像面S9形成影像。Fig. 1 is a schematic diagram of an image capturing device according to a first embodiment of the present invention. 1, the image capturing
蓋板101、第一透鏡102、第二透鏡104以及第三透鏡105各自包括物側面(如物側面S1、S3、S5、S7)以及像側面(如像側面S2、S4、S6、S8)。所述物側面為面向物側(或待測物10)且讓成像光束通過的表面，而所述像側面為面向像側(或成像面S9)且讓成像光束通過的表面。The
蓋板101適於保護位於其下的元件。在本實施例中，蓋板101為指壓板。在進行生物特徵辨識時，蓋板101的物側面S1為待測物10接觸的表面。也就是說，待測物10接觸蓋板101的物側面S1，以進行生物特徵辨識。指壓板可包括透光或半透光的主體，以利成像光束傳遞至感測器106。所述主體可包括玻璃板、塑膠板或上述兩個的組合，但不以此為限。此外，指壓板可選擇性地包括裝飾層，裝飾層設置在蓋板101上，以遮避其下方不欲被看見的元件。The
在另一實施例中，蓋板101可包括指壓板、顯示面板、觸控顯示面板或上述至少兩個的組合。舉例來說，蓋板101可以是顯示面板，如有機發光顯示面板，但不以此為限。替代地，蓋板101可以是觸控顯示面板，如具有多個觸控電極的有機發光顯示面板。所述多個觸控電極可以形成在有機發光顯示面板的外表面上或是內嵌於有機發光顯示面板中，且多個觸控電極可以藉由自容或互容的方式進行觸控偵測。或者，蓋板101可以是指壓板與顯示面板的組合或指壓板與觸控顯示面板的組合。In another embodiment, the
另外，當取像裝置100與液晶顯示器(包括液晶顯示面板以及背光模組)整合在一起時，蓋板101可設置在液晶顯示面板上方，或者，液晶顯示面板中的對向基板可作為取像裝置100的蓋板101。液晶顯示器中可形成有用以容置光學成像系統(包括第一透鏡102、第二透鏡104、第三透鏡105以及感測器106)的開孔。背光模組位於液晶顯示面板下方，以提供照明光束。為避免來自背光模組的照明光束直接傳遞至感測器106，背光模組與光學成像系統之間可形成有遮光結構，以維持理想的成像品質。在上述架構下也可進一步設置多個觸控電極，以提供觸控偵測功能。In addition, when the
第一透鏡102適於擴大取像裝置100的視場角(Field Of View, FOV)，使取像裝置100的感測器106能夠擷取更大的影像範圍。在本實施例中，第一透鏡102具有負屈光力。此外，第一透鏡102的物側面S3在近光軸處為凹面，且第一透鏡102的像側面S4在近光軸處為凹面。第一透鏡102可由塑膠材質製成，以滿足輕量化的需求，但不以此為限。The
光圈103適於減少雜散光，以提升影像品質。在本實施例中，光圈103設置在第一透鏡102與第二透鏡104之間，有助於擴大視場角，使取像裝置100具有廣角鏡頭的優勢。The
第二透鏡104適於修正第一透鏡102所產生的像差，並有助於減少球差的產生，以提升成像品質。在本實施例中，第二透鏡104具有正屈光力。此外，第二透鏡104的物側面S5在近光軸處為凸面，且第二透鏡104的像側面S6在近光軸處為凸面。第二透鏡104可由塑膠材質製成，以滿足輕量化的需求，但不以此為限。The
第三透鏡105也適於修正像差，並有助於減少球差的產生，以提升成像品質。此外，藉由多片透鏡(如第二透鏡104以及第三透鏡105)共同修正像差，除了可有效修正像差之外，還可降低用於修正像差的每一片透鏡的製造難度。在本實施例中，第三透鏡105具有負屈光力。此外，第三透鏡105的物側面S7在近光軸處為凹面，且第三透鏡105的像側面S8在近光軸處為凸面。第三透鏡105可由塑膠材質製成，以滿足輕量化的需求，但不以此為限。在本發明的任一示例性的實施例中，第三透鏡105的像側面S8上可以塗覆有紅外線濾除材料。或者，第三透鏡105與第二透鏡104之間可設置一紅外光濾除層(未繪示)。或者，第三透鏡105與成像面S9之間可設置有一紅外光濾除層(圖未繪示)。The
感測器106適於接收來自待測物10的成像光束。在本實施例中，感測器106可例如是電荷耦合器件(Charge-Coupled Device, CCD)或是互補式金屬氧化物半導體(Complementary Metal-Oxide-Semiconductor, CMOS)，然而本發明不加以限定。The
在取像裝置100中，只有第一透鏡102、第二透鏡104以及第三透鏡105具有屈光力，且取像裝置100中具有屈光力的透鏡只有上述兩片。換句話說，取像裝置100中透鏡的數量僅為三。In the
第一實施例的詳細光學數據如表一所示。
在本實施例中，第一透鏡102的物側面S3、第一透鏡102的像側面S4、第二透鏡104的物側面S5、第二透鏡104的像側面S6、第三透鏡105的物側面S7、第三透鏡105的像側面S8皆為非球面。非球面是依公式(1)定義：
第一透鏡102的物側面S3、第一透鏡102的像側面S4、第二透鏡104的物側面S5、第二透鏡104的像側面S6、第三透鏡105的物側面S7以及第三透鏡105的像側面S8在公式(1)中的各項非球面係數如表二所示。
第一實施例的取像裝置100中各重要參數間的關係如表三所示。
圖2A至圖2C分別是第一實施例的取像裝置的縱向球差與各項像差圖。圖2A繪示出當波長為550 nm時，在成像面S9上有關弧矢(sagittal)方向的場曲(field curvature)像差及子午(tangential)方向的場曲像差，其中弧矢方向及子午方向的場曲像差分別以曲線S及曲線T表示。圖2B繪示出當波長為550 nm時，在成像面S9上的畸變像差(distortion aberration)。圖2C繪示出當波長為550 nm且光瞳半徑(pupil radius)為0.0577 mm時的縱向球差(longitudinal spherical aberration)。從圖2A至圖2C可看出第一實施例的取像裝置100能明顯改善球差、有效消除像差且將畸變像差維持在成像品質要求內。據此說明第一實施例的取像裝置100在實現薄型化(OTL縮減至4.698 mm)的同時仍能提供良好的成像品質。2A to 2C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the first embodiment. Figure 2A illustrates the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane S9 when the wavelength is 550 nm, where the sagittal direction and The curvature of field aberration in the tangential direction is represented by a curve S and a curve T, respectively. FIG. 2B illustrates the distortion aberration on the imaging surface S9 when the wavelength is 550 nm. Figure 2C illustrates the longitudinal spherical aberration when the wavelength is 550 nm and the pupil radius is 0.0577 mm. It can be seen from FIGS. 2A to 2C that the
依據不同的需求，取像裝置100可進一步包括其他元件/膜層，或省略圖1中的元件/膜層。舉例來說，取像裝置100可進一步包括光源107，以提供照射待測物10的光束B3。光源107設置在蓋板101下方。換句話說，光源107、第一透鏡102、光圈103、第二透鏡104、第三透鏡105以及感測器106位於蓋板101的同一側。According to different requirements, the
光源107可為可見光光源。舉例來說，光源107的波長介於400奈米至600奈米之間，但不以此為限。替代地，光源107可為非可見光光源，如紅外光光源。在另一實施例中，當取像裝置100搭載有顯示模組時，可將顯示模組所發出的顯示光束的一部分用於生物特徵辨識，如此便可省略光源107的設置。在又一實施例中，當蓋板101為顯示面板時，可將顯示面板發出的顯示光束的一部分用於生物特徵辨識，如此便可省略光源107的設置。在再一實施例中，當蓋板101為顯示面板時，光源107可設置顯示面板的下方，且光源107可為非可見光光源，如紅外光光源。The
在本實施例中，取像裝置100的第一透鏡102、光圈103、第二透鏡104、第三透鏡105、感測器106可構成封裝組件108。透過將這些元件封裝在一起，有助於提升取像裝置100組裝時的便利性，並降低組裝所需的時間。In this embodiment, the
在本實施例中，取像裝置100還可選擇性包括固定件109與載體110。固定件109設置于封裝組件108與載板110之間，以將封裝組件108固定在載體110上。舉例而言，固定件109可以是光固化黏著膠、熱固化黏著膠、矽氧樹脂等膠材，或是卡槽結構、螺旋結構等結構，以使封裝組件108通過固定件109固定在載體110上。在本實施例中，固定件109可進一步設置于封裝組件108中。也就是說，固定件109可位於第一透鏡102與光圈103之間、光圈103與第二透鏡104之間、第二透鏡104與第三透鏡105之間以及第三透鏡105與感測器106之間。舉例來說，設置于封裝組件108中的固定件109可以例如是呈透明狀的黏著材料，以將第一透鏡102、光圈103、第二透鏡104、第三透鏡105、感測器106固定在一起，並且維持原先的成像品質，其中封裝組件108是可透光的材質。In this embodiment, the
在另一實施例中，當蓋板101為顯示面板時，顯示面板、第一透鏡102、光圈103、第二透鏡104、第三透鏡105、感測器106可構成封裝組件。固定件109可位於顯示面板與第一透鏡102之間、第一透鏡102與光圈103之間、光圈103與第二透鏡104之間、第二透鏡104與第三透鏡105之間以及第三透鏡105與感測器106之間。In another embodiment, when the
在本實施例中，載體110包括容置空間110s，封裝組件108可容置於容置空間110s內。然而，載體110的形狀不以此為限。舉例而言，載體110也可以是平面的板材，且封裝組件(包括或不包括顯示面板、包括或不包括蓋板101)通過固定件109固定在載體110上。In this embodiment, the
圖3是依照本發明的第二實施例的一種取像裝置的示意圖。請參照圖3，第二實施例的取像裝置100A與圖1的取像裝置100的差異在於：各光學數據、非球面係數及這些透鏡間的參數或多或少有些不同。此外，第一透鏡102的物側面S1在近光軸處為凸面以及第三透鏡105的像側面S8在近光軸處為凹面。Fig. 3 is a schematic diagram of an image capturing device according to a second embodiment of the present invention. Please refer to FIG. 3, the difference between the
第二實施例的詳細光學數據如表四所示。
第二實施例中各透鏡的物側面以及像側面在公式(1)中的各項非球面係數如表五所示。
第二實施例中各重要參數間的關係如表六所示。
圖4A至圖4C分別是第二實施例的取像裝置的縱向球差與各項像差圖。圖4A繪示出當波長為550 nm時，在成像面S9上有關弧矢方向的場曲像差及子午方向的場曲像差。圖4B繪示出當波長為550 nm時，在成像面S9上的畸變像差。圖4C繪示出當波長為550 nm且光瞳半徑為0.0629 mm時的縱向球差。從圖4A至圖4C可看出第二實施例的取像裝置100A能明顯改善球差、有效消除像差且將畸變像差維持在成像品質要求內。據此說明第二實施例的取像裝置100A在實現薄型化(OTL縮減至4.733 mm)的同時仍能提供良好的成像品質。4A to 4C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the second embodiment. FIG. 4A illustrates the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane S9 when the wavelength is 550 nm. FIG. 4B illustrates the distortion aberration on the imaging surface S9 when the wavelength is 550 nm. Figure 4C illustrates the longitudinal spherical aberration when the wavelength is 550 nm and the pupil radius is 0.0629 mm. It can be seen from FIGS. 4A to 4C that the
圖5是依照本發明的第三實施例的一種取像裝置的示意圖。請參照圖5，第三實施例的取像裝置100B與圖1的取像裝置100的差異在於：各光學數據、非球面係數及這些透鏡間的參數或多或少有些不同。此外，第一透鏡102的物側面S1在近光軸處為凸面以及第三透鏡105的像側面S8在近光軸處為凹面。Fig. 5 is a schematic diagram of an image capturing device according to a third embodiment of the present invention. Referring to FIG. 5, the difference between the
第三實施例的詳細光學數據如表七所示。
第三實施例中各透鏡的物側面以及像側面在公式(1)中的各項非球面係數如表八所示。
第三實施例中各重要參數間的關係如表九所示。
圖6A至圖6C分別是第三實施例的取像裝置的縱向球差與各項像差圖。圖6A繪示出當波長為550 nm時，在成像面S9上有關弧矢方向的場曲像差及子午方向的場曲像差。圖6B繪示出當波長為550 nm時，在成像面S9上的畸變像差。圖6C繪示出當波長為550 nm且光瞳半徑為0.0422 mm時的縱向球差。從圖6A至圖6C可看出第三實施例的取像裝置100B能明顯改善球差、有效消除像差且將畸變像差維持在成像品質要求內。據此說明第三實施例的取像裝置100B在實現薄型化(OTL縮減至4.394 mm)的同時仍能提供良好的成像品質。6A to 6C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the third embodiment. FIG. 6A illustrates the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane S9 when the wavelength is 550 nm. FIG. 6B illustrates the distortion aberration on the imaging surface S9 when the wavelength is 550 nm. Figure 6C illustrates the longitudinal spherical aberration when the wavelength is 550 nm and the pupil radius is 0.0422 mm. It can be seen from FIGS. 6A to 6C that the
圖7是依照本發明的第四實施例的一種取像裝置的示意圖。請參照圖7，第四實施例的取像裝置100C與圖1的取像裝置100的差異在於：各光學數據、非球面係數及這些透鏡間的參數或多或少有些不同。此外，第一透鏡102的物側面S1在近光軸處為凸面以及第三透鏡105的像側面S8在近光軸處為凹面。Fig. 7 is a schematic diagram of an image capturing device according to a fourth embodiment of the present invention. Please refer to FIG. 7, the difference between the
第四實施例的詳細光學數據如表十所示。
第四實施例中各透鏡的物側面以及像側面在公式(1)中的各項非球面係數如表十一所示。
第四實施例中各重要參數間的關係如表十二所示。
圖8A至圖8C分別是第四實施例的取像裝置的縱向球差與各項像差圖。圖8A繪示出當波長為550 nm時，在成像面S9上有關弧矢方向的場曲像差及子午方向的場曲像差。圖8B繪示出當波長為550 nm時，在成像面S9上的畸變像差。圖8C繪示出當波長為550 nm且光瞳半徑為0.039 mm時的縱向球差。從圖8A至圖8C可看出第四實施例的取像裝置100C能明顯改善球差、有效消除像差且將畸變像差維持在成像品質要求內。據此說明第四實施例的取像裝置100C在實現薄型化(OTL縮減至4.704 mm)的同時仍能提供良好的成像品質。8A to 8C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the fourth embodiment. FIG. 8A illustrates the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane S9 when the wavelength is 550 nm. FIG. 8B illustrates the distortion aberration on the imaging surface S9 when the wavelength is 550 nm. Figure 8C illustrates the longitudinal spherical aberration when the wavelength is 550 nm and the pupil radius is 0.039 mm. It can be seen from FIGS. 8A to 8C that the
圖9是依照本發明的第五實施例的一種取像裝置的示意圖。請參照圖9，第五實施例的取像裝置100D與圖1的取像裝置100的差異在於：各光學數據、非球面係數及這些透鏡間的參數或多或少有些不同。此外，第一透鏡102的物側面S1在近光軸處為凸面。Fig. 9 is a schematic diagram of an image capturing device according to a fifth embodiment of the present invention. Please refer to FIG. 9, the difference between the
第五實施例的詳細光學數據如表十三所示。
第五實施例中各透鏡的物側面以及像側面在公式(1)中的各項非球面係數如表十四所示。
第五實施例中各重要參數間的關係如表十五所示。
圖10A至圖10C分別是第五實施例的取像裝置的縱向球差與各項像差圖。圖10A繪示出當波長為550 nm時，在成像面S9上有關弧矢方向的場曲像差及子午方向的場曲像差。圖10B繪示出當波長為550 nm時，在成像面S9上的畸變像差。圖8C繪示出當波長為550 nm且光瞳半徑為0.0585 mm時的縱向球差。從圖10A至圖10C可看出第五實施例的取像裝置100D能明顯改善球差、有效消除像差且將畸變像差維持在成像品質要求內。據此說明第五實施例的取像裝置100D在實現薄型化(OTL縮減至4.457 mm)的同時仍能提供良好的成像品質。10A to 10C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the fifth embodiment, respectively. FIG. 10A illustrates the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane S9 when the wavelength is 550 nm. FIG. 10B illustrates the distortion aberration on the imaging surface S9 when the wavelength is 550 nm. Figure 8C illustrates the longitudinal spherical aberration when the wavelength is 550 nm and the pupil radius is 0.0585 mm. It can be seen from FIGS. 10A to 10C that the
圖11是依照本發明的第六實施例的一種取像裝置的示意圖。請參照圖11，第六實施例的取像裝置100E與圖1的取像裝置100的差異在於：各光學數據、非球面係數及這些透鏡間的參數或多或少有些不同。此外，第一透鏡102的物側面S1在近光軸處為凸面。Fig. 11 is a schematic diagram of an image capturing device according to a sixth embodiment of the present invention. Please refer to FIG. 11, the difference between the
第六實施例的詳細光學數據如表十六所示。
第六實施例中各透鏡的物側面以及像側面在公式(1)中的各項非球面係數如表十七所示。
第六實施例中各重要參數間的關係如表十八所示。
圖12A至圖12C分別是第六實施例的取像裝置的縱向球差與各項像差圖。圖12A繪示出當波長為550 nm時，在成像面S9上有關弧矢方向的場曲像差及子午方向的場曲像差。圖12B繪示出當波長為550 nm時，在成像面S9上的畸變像差。圖12C繪示出當波長為550 nm且光瞳半徑為0.0481 mm時的縱向球差。從圖12A至圖12C可看出第六實施例的取像裝置100E能明顯改善球差、有效消除像差且將畸變像差維持在成像品質要求內。據此說明第六實施例的取像裝置100E在實現薄型化(OTL縮減至4.716 mm)的同時仍能提供良好的成像品質。12A to 12C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the sixth embodiment, respectively. FIG. 12A illustrates the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane S9 when the wavelength is 550 nm. FIG. 12B illustrates the distortion aberration on the imaging surface S9 when the wavelength is 550 nm. Figure 12C illustrates the longitudinal spherical aberration when the wavelength is 550 nm and the pupil radius is 0.0481 mm. It can be seen from FIGS. 12A to 12C that the
在本發明的各個實施例中，同時考量製造的難易度、製程成本、整體厚度以及成像品質，若滿足以下條件式的其中至少一個，能有較佳的設置。
f/imgH ＜ 0.45；
4.5 ＜ N1+N2+N3 ＜ 5.4；
2 ＜ (OTL-d)/imgH ＜ 9；
Fno ＜ 3.7或f/EPD ＜ 3.7；
(OTL-d) ＜ 3.5 mm；
V1+V2+V3 ＜ 75；
0.7＜ |f/f1|+|f/f2|+|f/f3| ＜ 1.7；
100度 ＜ FOV ＜ 180度；以及
第三透鏡105的像側面S8至成像面S9在光軸I上的距離大於0.29 mm。In each embodiment of the present invention, considering the ease of manufacture, process cost, overall thickness, and imaging quality at the same time, if at least one of the following conditional expressions is satisfied, a better setting can be made.
f/imgH <0.45;
4.5 ＜ N1+N2+N3 ＜ 5.4;
2 ＜ (OTL-d)/imgH ＜ 9;
Fno <3.7 or f/EPD <3.7;
(OTL-d) <3.5 mm;
V1+V2+V3 ＜75;
0.7＜ |f/f1|+|f/f2|+|f/f3| ＜ 1.7;
100 degrees ＜ FOV ＜ 180 degrees; and
The distance on the optical axis I from the image side surface S8 of the
詳細而言，藉由滿足f/imgH ＜ 0.45，有助於搜集大角度的光束，使取像裝置能夠在短距離內擷取更大的影像範圍。藉由滿足4.5 ＜ N1+N2+N3 ＜ 5.4，有助於縮減取像裝置的體積，從而實現薄型化。藉由滿足2 ＜ (OTL-d)/imgH ＜ 9以及(OTL-d) ＜ 3.5 mm的其中至少一者，可實現薄型化。藉由滿足Fno ＜ 3.7或f/EPD ＜ 3.7，可具有較大的光圈。如此，在光線不足的環境下，也可具有良好的成像效果。藉由滿足V1+V2+V3 ＜ 75，有助於修正色差。藉由滿足0.7＜ |f/f1|+|f/f2|+|f/f3| ＜ 1.7，除了可有效修正像差，還可降低光學系統的敏感度。藉由滿足100度 ＜ FOV ＜ 180度，可獲得所需的取像範圍，並可適當地控制畸變程度。In detail, by satisfying f/imgH <0.45, it is helpful to collect a large-angle beam, so that the image capturing device can capture a larger image range in a short distance. By satisfying 4.5 <N1+N2+N3 <5.4, it is helpful to reduce the volume of the imaging device, thereby achieving a thin profile. By satisfying at least one of 2 <(OTL-d)/imgH <9 and (OTL-d) <3.5 mm, thinning can be achieved. By satisfying Fno <3.7 or f/EPD <3.7, a larger aperture can be achieved. In this way, it can also have a good imaging effect in an environment with insufficient light. By satisfying V1+V2+V3 <75, it helps to correct the chromatic aberration. By satisfying 0.7< |f/f1|+|f/f2|+|f/f3| <1.7, in addition to effectively correcting aberrations, the sensitivity of the optical system can also be reduced. By satisfying 100 degrees <FOV <180 degrees, the required imaging range can be obtained and the degree of distortion can be appropriately controlled.
有鑑於光學系統設計的不可預測性，在本發明的架構之下，符合上述條件式的其中至少一者能較佳地使取像裝置的厚度降低、可用光圈增大、成像品質提升或組裝良率提升而改善先前技術的缺點。In view of the unpredictability of the optical system design, under the framework of the present invention, at least one of the above-mentioned conditional formulas can better reduce the thickness of the imaging device, increase the available aperture, improve the imaging quality, or improve assembly. Rate increases to improve the shortcomings of the prior art.
綜上所述，本發明的實施例的取像裝置具有下述的功效及優點的至少其中一者：In summary, the imaging device of the embodiment of the present invention has at least one of the following functions and advantages:
一、相較於藉由兩片以下的透鏡截取被待測物反射的光束，藉由三片透鏡擷取被待測物反射的光束，有助於修正像差以及降低透鏡的製造難度。1. Compared with using two or less lenses to intercept the light beam reflected by the object to be measured, using three lenses to capture the light beam reflected by the object to be measured will help correct aberrations and reduce the difficulty of lens manufacturing.
二、三片透鏡的物側面及像側面皆採用非球面的設計，有助於降低像差。Both the object side and the image side of the three lenses are designed with aspherical surfaces, which helps reduce aberrations.
三、三片透鏡的取像裝置可助於搜集大角度之光束，進而令取像裝置接收大範圍的影像。此外，其亦有助於縮減待測物與取向裝置的距離，有效縮小取像裝置的體積，而實現薄型化。3. The three-lens image capturing device can help to collect a large-angle beam, and then the image capturing device can receive a wide range of images. In addition, it also helps to reduce the distance between the object to be measured and the orientation device, effectively reducing the volume of the imaging device, and achieving a thinner profile.
四、第三透鏡的像側面至成像面在光軸上的距離大於0.29 mm。藉此，可在第三透鏡與成像面之間依需求設置元件/膜層，如濾光元件，但不以此為限。4. The distance on the optical axis from the image side surface of the third lens to the imaging surface is greater than 0.29 mm. In this way, an element/film layer, such as a filter element, can be arranged between the third lens and the imaging surface as required, but not limited to this.
五、可選擇性地設置光圈，以減少雜散光，從而提升影像品質。在一實施例中，藉由將光圈設置在第一透鏡與第二透鏡之間，有助於擴大視場角，使取像裝置具有廣角鏡頭的優勢。5. The aperture can be set selectively to reduce stray light and improve image quality. In one embodiment, by setting the aperture between the first lens and the second lens, it helps to expand the field of view, so that the image capturing device has the advantage of a wide-angle lens.
六、本發明各實施例的縱向球差、場曲、畸變皆符合使用規範。6. The longitudinal spherical aberration, field curvature, and distortion of the various embodiments of the present invention are in compliance with the usage specifications.
七、在前述所列之示例性限定條件式中，最大值/最小值以內的數值範圍皆可據以實施。亦可任意選擇性地合併不等數量的示例性限定條件式施用於本發明之實施態樣中。7. In the above-mentioned exemplary limited condition formulas, the numerical range within the maximum value/minimum value can be implemented accordingly. An unequal number of exemplary limited conditional expressions can also be optionally combined and applied to the embodiments of the present invention.
雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.
10‧‧‧待測物
100、100A、100B、100C、100D、100E‧‧‧取像裝置
101‧‧‧蓋板
102‧‧‧第一透鏡
103‧‧‧光圈
104‧‧‧第二透鏡
105‧‧‧第三透鏡
106‧‧‧感測器
107‧‧‧光源
108‧‧‧封裝組件
109‧‧‧固定件
110‧‧‧載板
110s‧‧‧容置空間
B1、B2‧‧‧成像光束
B3‧‧‧光束
d‧‧‧厚度
I‧‧‧光軸
S、T‧‧‧曲線
S1、S3、S5、S7‧‧‧物側面
S2、S4、S6、S8‧‧‧像側面
S9‧‧‧成像面
S10‧‧‧表面10‧‧‧Object to be tested
100, 100A, 100B, 100C, 100D, 100E‧‧‧
圖1是依照本發明的第一實施例的一種取像裝置的示意圖。 圖2A至圖2C分別是第一實施例的取像裝置的縱向球差與各項像差圖。 圖3是依照本發明的第二實施例的一種取像裝置的示意圖。 圖4A至圖4C分別是第二實施例的取像裝置的縱向球差與各項像差圖。 圖5是依照本發明的第三實施例的一種取像裝置的示意圖。 圖6A至圖6C分別是第三實施例的取像裝置的縱向球差與各項像差圖。 圖7是依照本發明的第四實施例的一種取像裝置的示意圖。 圖8A至圖8C分別是第四實施例的取像裝置的縱向球差與各項像差圖。 圖9是依照本發明的第五實施例的一種取像裝置的示意圖。 圖10A至圖10C分別是第五實施例的取像裝置的縱向球差與各項像差圖。 圖11是依照本發明的第六實施例的一種取像裝置的示意圖。 圖12A至圖12C分別是第六實施例的取像裝置的縱向球差與各項像差圖。Fig. 1 is a schematic diagram of an image capturing device according to a first embodiment of the present invention. 2A to 2C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the first embodiment. Fig. 3 is a schematic diagram of an image capturing device according to a second embodiment of the present invention. 4A to 4C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the second embodiment. Fig. 5 is a schematic diagram of an image capturing device according to a third embodiment of the present invention. 6A to 6C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the third embodiment. Fig. 7 is a schematic diagram of an image capturing device according to a fourth embodiment of the present invention. 8A to 8C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the fourth embodiment. Fig. 9 is a schematic diagram of an image capturing device according to a fifth embodiment of the present invention. 10A to 10C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the fifth embodiment, respectively. Fig. 11 is a schematic diagram of an image capturing device according to a sixth embodiment of the present invention. 12A to 12C are graphs of longitudinal spherical aberration and various aberrations of the imaging device of the sixth embodiment, respectively.
10‧‧‧待測物 10‧‧‧Object to be tested
100‧‧‧取像裝置 100‧‧‧Image capture device
101‧‧‧蓋板 101‧‧‧Cover plate
102‧‧‧第一透鏡 102‧‧‧First lens
103‧‧‧光圈 103‧‧‧Aperture
104‧‧‧第二透鏡 104‧‧‧Second lens
105‧‧‧第三透鏡 105‧‧‧Third lens
106‧‧‧感測器 106‧‧‧Sensor
107‧‧‧光源 107‧‧‧Light source
B1、B2‧‧‧成像光束 B1, B2‧‧‧imaging beam
B3‧‧‧光束 B3‧‧‧Beam
d‧‧‧厚度 d‧‧‧Thickness
I‧‧‧光軸 I‧‧‧Optical axis
S1、S3、S5、S7‧‧‧物側面 S1, S3, S5, S7‧‧‧Object side
S2、S4、S6、S8‧‧‧像側面 S2, S4, S6, S8‧‧‧Image side
S9‧‧‧成像面 S9‧‧‧Image surface
S10‧‧‧表面 S10‧‧‧surface
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| US15/942,441 | 2018-03-31 | ||
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| US201862715294P | 2018-08-07 | 2018-08-07 | |
| US62/715,294 | 2018-08-07 |
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| TWI679449B (en) | 2018-12-03 | 2019-12-11 | 大立光電股份有限公司 | Optical imaging lens assembly, image capturing unit and electronic device |
| TWI691733B (en) | 2019-04-10 | 2020-04-21 | 大立光電股份有限公司 | Optical photographing lens assembly, fingerprint identification module and electronic device |
| TWI716220B (en) * | 2019-12-11 | 2021-01-11 | 新鉅科技股份有限公司 | Three-piece compact optical lens system |
| CN113156609B (en) * | 2020-01-07 | 2022-12-20 | 新巨科技股份有限公司 | Three-piece thin imaging lens group |
| US20230074241A1 (en) * | 2020-06-07 | 2023-03-09 | Egis Technology Inc. | Electronic device |
| CN114384673B (en) * | 2022-03-24 | 2022-08-12 | 江西联益光学有限公司 | Wide-angle lens and imaging apparatus |
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| TW201319609A (en) * | 2011-11-11 | 2013-05-16 | Largan Precision Co Ltd | Optical lens system for image taking |
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