TWI402556B - Zoom projection lens - Google Patents
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Description
本發明涉及一種變焦投影鏡頭。 The present invention relates to a zoom projection lens.
先前許多投影機具備變焦功能，以適應不同的投影場所，如空曠的商業場所或狹小的家庭娛樂場所。這種具有變焦功能的投影機鏡頭通常包括多個透鏡組，通過改變透鏡組之間的相對位置改變變焦投影鏡頭的有效焦距，從而實現變焦功能。惟，由於投影機在工作的過程中，會產生大量的熱量，而塑膠鏡片的膨脹係數比較大，在高溫條件下，塑膠鏡片的折射率會發生很大變化，從而影響投影成像品質，因此現在的投影鏡頭內一般會全部使用玻璃鏡片，然，玻璃鏡片的價格比塑膠鏡片高很多，這樣就增大了投影鏡頭的生產成本。 Many projectors previously had zoom capabilities to accommodate different projection locations, such as open commercial spaces or small family entertainment venues. Such a projector lens having a zoom function generally includes a plurality of lens groups, and the effective focal length of the zoom projection lens is changed by changing the relative position between the lens groups, thereby realizing a zoom function. However, since the projector generates a large amount of heat during the working process, and the expansion coefficient of the plastic lens is relatively large, the refractive index of the plastic lens changes greatly under high temperature conditions, thereby affecting the quality of the projection image, so now Glass lenses are generally used in the projection lens. However, the price of the glass lens is much higher than that of the plastic lens, which increases the production cost of the projection lens.
有鑒於此，有必要提供一種在高溫下的投影成像品質好且成本較低的變焦投影鏡頭。 In view of this, it is necessary to provide a zoom projection lens of high quality and low cost projection imaging at high temperatures.
一種變焦投影鏡頭，沿其光軸方向從放大端到縮小端依序包括一個具有負光焦度的第一透鏡組、一個具有正光焦度的第二透鏡組、一個具有正光焦度的第三透鏡組、一個具有負光焦度的第四透鏡組及一個具有正光焦度的第五透鏡組。所述第一、第二、第三、第四透鏡組能夠沿光軸方向移動，以實現變焦。所述第五透鏡組固定不動。所述第一透鏡組包括一個具有負光焦度的第一非球面塑膠透鏡，所述第二透鏡組包括一個具有正光焦度的 第二非球面塑膠透鏡，所述第四透鏡組包括一個具有負光焦度的第三非球面塑膠透鏡，所述變焦投影鏡頭滿足以下條件式：(1)-2.4≦Fa1/Fw≦-2.1 A zoom projection lens sequentially includes a first lens group having a negative power, a second lens group having a positive power, and a third having a positive power along an optical axis direction thereof from an enlarged end to a reduced end. A lens group, a fourth lens group having a negative power, and a fifth lens group having a positive power. The first, second, third, and fourth lens groups are movable in the optical axis direction to achieve zooming. The fifth lens group is fixed. The first lens group includes a first aspheric plastic lens having a negative power, and the second lens group includes a positive optical power a second aspherical plastic lens, the fourth lens group comprising a third aspherical plastic lens having a negative refractive power, the zoom projection lens satisfying the following conditional formula: (1)-2.4≦Fa1/Fw≦-2.1
(2)2.9≦Fb1/Fw≦3.2 (2) 2.9≦Fb1/Fw≦3.2
(3)-3.8≦Fa2/Fw≦-3.6 (3)-3.8≦Fa2/Fw≦-3.6
其中，Fa1、Fb1、Fa2分別為所述第一、第二、第三非球面塑膠透鏡的有效焦距，Fw為所述變焦投影鏡頭處於廣角端狀態時的有效焦距。 Wherein, Fa1, Fb1, and Fa2 are effective focal lengths of the first, second, and third aspherical plastic lenses, respectively, and Fw is an effective focal length when the zoom projection lens is in a wide-angle end state.
相較於先前技術，本發明的變焦投影鏡頭，利用上述條件式對所述三個非球面塑膠透鏡的光焦度進行合理分配，使得所述三個非球面塑膠透鏡在溫度升高時折射率變化，所導致的所述變焦投影鏡頭後焦距的變化能相互抵消，並且所述變焦投影鏡頭的後焦距保持在最佳的長度，從而有效保證所述變焦投影鏡頭的投影成像品質，同時由於塑膠鏡片的價格便宜，因此降低了所述變焦投影鏡頭的生產成本。 Compared with the prior art, the zoom projection lens of the present invention uses the above conditional expression to reasonably distribute the power of the three aspheric plastic lenses so that the refractive index of the three aspheric plastic lenses increases when the temperature rises. The change of the back focal length of the zoom projection lens can be offset by each other, and the back focus of the zoom projection lens is maintained at an optimal length, thereby effectively ensuring the projection image quality of the zoom projection lens, and at the same time The lens is inexpensive, thus reducing the production cost of the zoom projection lens.
下面將結合附圖，對本發明作進一步的詳細說明。 The invention will be further described in detail below with reference to the accompanying drawings.
請參閱圖1及圖2，為本發明實施方式所提供的變焦投影鏡頭100，沿其光軸方向從放大端到縮小端(近DMD端)依序包括：一個具有負光焦度的第一透鏡組10、一個具有正光焦度的第二透鏡組20、一個具有正光焦度的第三透鏡組30、一個具有負光焦度的第四透鏡組40、一個具有 正光焦度的第五透鏡組50及一個成像面61。 Referring to FIG. 1 and FIG. 2 , a zoom projection lens 100 according to an embodiment of the present invention includes, in an optical axis direction thereof, an amplification end to a reduction end (near DMD end) sequentially: a first having a negative refractive power. a lens group 10, a second lens group 20 having positive power, a third lens group 30 having positive power, a fourth lens group 40 having negative power, and one having The fifth lens group 50 of positive power and one imaging surface 61.
在所述變焦投影鏡頭100的變焦過程中，所述第一透鏡組10、第二透鏡組20、第三透鏡組30及第四透鏡組40都能沿所述變焦投影鏡頭100的光軸方向移動，用於改變所述變焦投影鏡頭100的有效焦距，進行變焦。所述第五透鏡組50固定不動。 In the zooming process of the zoom projection lens 100, the first lens group 10, the second lens group 20, the third lens group 30, and the fourth lens group 40 are all along the optical axis direction of the zoom projection lens 100. Moving for changing the effective focal length of the zoom projection lens 100 for zooming. The fifth lens group 50 is fixed.
本實施方式中，所述變焦投影鏡頭100應用於DMD投影儀，投影時，DMD調製的投影信號光自所述成像面61依次經所述第五透鏡組50、第四透鏡組40、第三透鏡組30、第二透鏡組20及第一透鏡組10，投射於螢幕(圖未示)上，便可得到投影畫面。 In the embodiment, the zoom projection lens 100 is applied to a DMD projector. When projecting, the DMD modulated projection signal light sequentially passes through the fifth lens group 50, the fourth lens group 40, and the third from the imaging surface 61. The lens group 30, the second lens group 20, and the first lens group 10 are projected onto a screen (not shown) to obtain a projection screen.
所述第一透鏡組10包括從放大端到縮小端依次排列的一個第一球面透鏡11及一個第一非球面塑膠透鏡12。所述第二透鏡組20包括從放大端到縮小端依次排列的一個第二非球面塑膠透鏡21、一個第二球面透鏡22及一個第三球面透鏡23。所述第三透鏡組30包括一個第四球面透鏡31。所述第四透鏡組40包括從放大端到縮小端依次排列的一個第三非球面塑膠透鏡41、一個第五球面透鏡42、一個第六球面透鏡43及一個第七球面透鏡44。所述第五透鏡組50包括一個第八球面透鏡51。所述第一、第二、第三、第四、第五、第六、第七、第八球面透鏡11、22、23、31、42、43、44、51均為玻璃鏡片。其中，所述第二球面透鏡22及第三球面透鏡23膠合固定，所述第五球面透鏡42及所述第六球面透鏡43膠合固定，這樣可有效地補正所述變焦投影鏡頭100的軸向色差，優化所述變 焦投影鏡頭100的整體性能。 The first lens group 10 includes a first spherical lens 11 and a first aspheric plastic lens 12 arranged in order from an enlarged end to a reduced end. The second lens group 20 includes a second aspherical plastic lens 21, a second spherical lens 22, and a third spherical lens 23 arranged in order from the enlarged end to the reduced end. The third lens group 30 includes a fourth spherical lens 31. The fourth lens group 40 includes a third aspherical plastic lens 41, a fifth spherical lens 42, a sixth spherical lens 43, and a seventh spherical lens 44 which are sequentially arranged from the enlarged end to the reduced end. The fifth lens group 50 includes an eighth spherical lens 51. The first, second, third, fourth, fifth, sixth, seventh, and eighth spherical lenses 11, 22, 23, 31, 42, 43, 44, 51 are all glass lenses. The second spherical lens 22 and the third spherical lens 23 are glued and fixed, and the fifth spherical lens 42 and the sixth spherical lens 43 are glued and fixed, so that the axial direction of the zoom projection lens 100 can be effectively corrected. Chromatic aberration, optimize the change The overall performance of the focal projection lens 100.
所述變焦投影鏡頭100還包括一個設置於第二透鏡組20與第三透鏡組30之間的光闌(Aperture stop)70，以保證所述變焦投影鏡頭100的整體結構相對於光闌70對稱，有效地降低慧差(coma)的影響；同時限制經過所述第二透鏡組20的光線進入所述第三透鏡組30的光通量，並讓經過所述第三透鏡組30後的光錐更加對稱，使所述變焦投影鏡頭100的彗差得以修正。在本實施方式中，在所述變焦投影鏡頭100進行變焦的過程中，所述光闌70隨所述第二透鏡組20一起移動，且所述光闌70的孔徑保持不變。 The zoom projection lens 100 further includes an aperture stop 70 disposed between the second lens group 20 and the third lens group 30 to ensure that the overall structure of the zoom projection lens 100 is symmetrical with respect to the aperture 70. Effectively reducing the influence of coma; while limiting the amount of light passing through the second lens group 20 into the third lens group 30, and allowing the light cone after passing through the third lens group 30 to be more Symmetry, the coma of the zoom projection lens 100 is corrected. In the present embodiment, during the zooming of the zoom projection lens 100, the diaphragm 70 moves with the second lens group 20, and the aperture of the diaphragm 70 remains unchanged.
所述變焦投影鏡頭100還包括位於所述第五透鏡組50與所述成像面61之間且從放大端到縮小端依次排列的一個棱鏡80、一個第一平板玻璃91、一個第二平板玻璃92、一個第三平板玻璃93、一個第四平板玻璃94、一個第五平板玻璃95及一個保護玻璃96。其中，所述第一平板玻璃91與所述第二平板玻璃92膠合固定，所述第三平板玻璃93與所述第四平板玻璃94膠合固定，所述第五平板玻璃95及所述保護玻璃96膠合固定，所述保護玻璃96與所述成像面61膠合固定。 The zoom projection lens 100 further includes a prism 80 between the fifth lens group 50 and the imaging surface 61 and arranged in order from the enlarged end to the reduced end, a first flat glass 91, and a second flat glass. 92. A third flat glass 93, a fourth flat glass 94, a fifth flat glass 95 and a protective glass 96. The first flat glass 91 and the second flat glass 92 are glued and fixed, and the third flat glass 93 and the fourth flat glass 94 are glued and fixed, and the fifth flat glass 95 and the protective glass are fixed. 96 is fixed by gluing, and the protective glass 96 is glued and fixed to the image forming surface 61.
具體的，DMD投影儀投影時，成像面61投射出的投影信號光線依次經過所述保護玻璃96、第五平板玻璃95、第四平板玻璃94、第三平板玻璃93、第二平板玻璃92及第一平板玻璃91後進入所述變焦投影鏡頭100。所述第五平板玻璃95、第四平板玻璃94、第三平板玻璃93、第二平板玻璃92及第一平板玻璃91可以根據使用需要鍍不同功能 的膜層，例如濾光膜。 Specifically, when the DMD projector is projected, the projection signal light projected by the imaging surface 61 sequentially passes through the protective glass 96, the fifth flat glass 95, the fourth flat glass 94, the third flat glass 93, and the second flat glass 92. The first flat glass 91 enters the zoom projection lens 100. The fifth flat glass 95, the fourth flat glass 94, the third flat glass 93, the second flat glass 92, and the first flat glass 91 may be plated with different functions according to the needs of use. The film layer, such as a filter film.
所述變焦投影鏡頭100滿足以下條件式：(1)-2.4≦Fa1/Fw≦-2.1 The zoom projection lens 100 satisfies the following conditional formula: (1) - 2.4 ≦ F a1 / F w ≦ - 2.1
(2)2.9≦Fb1/Fw≦3.2 (2) 2.9≦F b1 /F w ≦3.2
(3)-3.8≦Fa2/Fw≦-3.6 (3)-3.8≦F a2 /F w ≦-3.6
其中，Fa1為所述第一非球面塑膠透鏡12的有效焦距，Fb1為所述第二非球面塑膠透鏡21的有效焦距，Fa2為所述第三非球面塑膠透鏡41的有效焦距，Fw為所述變焦投影鏡頭100處於廣角端時的有效焦距。條件式(1)~(3)對所述第一、第二、第三非球面塑膠透鏡12、21、41的光焦度進行合理分配(限定各非球面塑膠透鏡的光焦度與所述變焦投影鏡頭100光焦度的關係)，保證在溫度升高時，所述變焦投影鏡頭100仍具有較好的投影成像品質。具體的，由於所述變焦投影鏡頭100在工作過程中產生大量的熱量，使得各透鏡的溫度升高，若滿足上述三個條件式，在溫度升高時，所述第一非球面塑膠透鏡12及所述第二非球面塑膠透鏡21的折射率變化，使所述變焦投影鏡頭100的後焦距變大，而所述第三非球面塑膠透鏡41的折射率變化，使所述變焦投影鏡頭100的後焦距變小，上述兩種變化相抵消，使得所述變焦投影鏡頭100的後焦距保持在最佳的長度。 Wherein F a1 is an effective focal length of the first aspheric plastic lens 12, F b1 is an effective focal length of the second aspheric plastic lens 21, and F a2 is an effective focal length of the third aspheric plastic lens 41, F w is an effective focal length when the zoom projection lens 100 is at the wide angle end. Conditional formulae (1) to (3) reasonably distribute the power of the first, second, and third aspheric plastic lenses 12, 21, and 41 (defining the power of each aspherical plastic lens and the The relationship between the power of the zoom projection lens 100 ensures that the zoom projection lens 100 still has better projection imaging quality when the temperature is raised. Specifically, since the zoom projection lens 100 generates a large amount of heat during operation, the temperature of each lens is increased. If the above three conditional expressions are satisfied, the first aspheric plastic lens 12 is raised when the temperature is raised. And a change in the refractive index of the second aspherical plastic lens 21, so that the back focal length of the zoom projection lens 100 becomes larger, and the refractive index of the third aspherical plastic lens 41 changes, so that the zoom projection lens 100 The back focal length becomes smaller, and the above two variations cancel out, so that the back focal length of the zoom projection lens 100 is maintained at an optimum length.
在本實施方式中，Fa1=-41.48mm，Fb1=56.88mm，Fa2=-70.37mm，Fw=18.68mm，經計算得出，Fa1/Fw=-2.22，Fb1/Fw=3.05，Fa2/Fw=-3.76。 In the present embodiment, F a1 = -41.48 mm, F b1 = 56.88 mm, F a2 = -70.37 mm, F w = 18.68 mm, and calculated, F a1 /F w =-2.22, F b1 /F w = 3.05, F a2 /F w =-3.76.
所述變焦投影鏡頭100的各光學元件滿足表1、表2及表3的條件。下列表(一)中分別列有由放大端到縮小端依序編號的光學面號碼(Surface #)、R為各透鏡的光學表面的曲率半徑、D為為對應表面到後一個表面的軸上距離(兩個表面截得光軸的長度)、Nd為對應透鏡組對d光(波長為587nm)的折射率，Vd為對應透鏡組對d光(波長為587nm)的阿貝數(Abbe number)，F為所述變焦投影鏡頭100的有效焦距。 The optical elements of the zoom projection lens 100 satisfy the conditions of Table 1, Table 2, and Table 3. In the following list (1), there are optical surface numbers (Surface #) sequentially numbered from the enlarged end to the reduced end, R is the radius of curvature of the optical surface of each lens, and D is the axis corresponding to the surface of the back surface. The distance (the length of the two surfaces intercepted by the optical axis), Nd is the refractive index of the corresponding lens group for d light (wavelength 587 nm), and Vd is the Abbe number of the corresponding lens group for d light (wavelength 587 nm) (Abbe number) F is the effective focal length of the zoom projection lens 100.
本實施方式的變焦投影鏡頭100處於廣角端狀態時，其像差、場曲、畸變及橫向色差分別如圖3到圖6所示。圖3中 ，分別為針對波長為460 nm的光，波長為550 nm的光，波長為610 nm的光而觀察到的球面像差曲線。總體而言，本實施方式的變焦投影鏡頭100對可見光(波長範圍在400 nm-700 nm之間)產生的像差值控制在(-0.1mm,0.1mm)範圍內。圖4中，曲線T及S分別為子午場曲(tangential field curvature)特性曲線及弧矢場曲(sagittal field curvature)特性曲線。可見，子午場曲值和弧矢場曲值被控制在(-0.2mm，0.2mm)範圍內。圖5中，曲線dis為畸變特性曲線。由圖可知，畸變量被控制在(-1.5%，0)範圍內。圖6中，分別為針對波長為460 nm的光，波長為550 nm的光，波長為610 nm而觀察到的橫向色差曲線。總體而言，本實施方式的變焦投影鏡頭100對可見光(波長範圍在400 nm-700 nm之間)產生的橫向色差值控制在(-10um,10um)範圍內。由此可見，所述變焦投影鏡頭100處於廣角端狀態時的球面像差、場曲、畸變及橫向色差都能被控制(修正)在較小的範圍內。 When the zoom projection lens 100 of the present embodiment is in the wide-angle end state, aberration, curvature of field, distortion, and lateral chromatic aberration are respectively shown in FIGS. 3 to 6 . In Figure 3 The spherical aberration curves observed for light with a wavelength of 460 nm, light with a wavelength of 550 nm, and light with a wavelength of 610 nm. In general, the zoom projection lens 100 of the present embodiment controls the aberration value generated for visible light (wavelength ranging from 400 nm to 700 nm) in the range of (-0.1 mm, 0.1 mm). In Fig. 4, the curves T and S are the tangential field curvature characteristic curve and the sagittal field curvature characteristic curve, respectively. It can be seen that the meridional curvature value and the sagittal curvature value are controlled within the range of (-0.2 mm, 0.2 mm). In Fig. 5, the curve dis is a distortion characteristic curve. As can be seen from the figure, the distortion is controlled within the range of (-1.5%, 0). In Fig. 6, the lateral chromatic aberration curves observed for a wavelength of 460 nm, a wavelength of 550 nm, and a wavelength of 610 nm, respectively. In general, the zoom projection lens 100 of the present embodiment controls the lateral color difference value of visible light (wavelength ranging from 400 nm to 700 nm) in the range of (-10 um, 10 um). It can be seen that the spherical aberration, field curvature, distortion, and lateral chromatic aberration when the zoom projection lens 100 is in the wide-angle end state can be controlled (corrected) in a small range.
本實施方式的變焦投影鏡頭100處於攝遠端狀態時，其像差、場曲及畸變分別如圖7到圖10所示。圖7中，分別為針對波長為460 nm的光，波長為550 nm的光，波長為610 nm的光而觀察到的球面像差值曲線。總體而言，本實施方式的變焦投影鏡頭100對可見光(波長範圍在400 nm-700 nm之間)產生的像差值控制在(-0.1 mm,0.1 mm)範圍內。圖8中，曲線T及S分別為子午場曲(tangential field curvature)特性曲線及弧矢場曲 (sagittal field curvature)特性曲線。可見，子午場曲值和弧矢場曲值被控制在(-0.2mm,0.2mm)範圍內。圖9中，曲線dis為畸變特性曲線。由圖可知，畸變量被控制在(0,0.2%)範圍內。圖10中，分別為針對波長為460 nm的光，波長為550 nm的光，波長為610 nm而觀察到的橫向色差曲線。總體而言，本實施方式的變焦投影鏡頭100對可見光(波長範圍在400 nm-700 nm之間)產生的橫向色差值控制在(-10um,10um)範圍內。由此可見，所述變焦投影鏡頭100處於攝遠端狀態時的球面像差、場曲、畸變及橫向色差都能被控制(修正)在較小的範圍內。 When the zoom projection lens 100 of the present embodiment is in the telephoto end state, its aberration, curvature of field, and distortion are as shown in FIGS. 7 to 10, respectively. In Fig. 7, the spherical aberration value curves observed for light having a wavelength of 460 nm, light having a wavelength of 550 nm, and light having a wavelength of 610 nm, respectively. In general, the zoom projection lens 100 of the present embodiment controls the aberration value generated for visible light (wavelength ranging from 400 nm to 700 nm) in the range of (-0.1 mm, 0.1 mm). In Fig. 8, the curves T and S are the tangential field curvature characteristic curve and the sagittal field curvature, respectively. (sagittal field curvature) characteristic curve. It can be seen that the meridional curvature value and the sagittal curvature value are controlled within the range of (-0.2 mm, 0.2 mm). In Fig. 9, the curve dis is a distortion characteristic curve. As can be seen from the figure, the distortion is controlled within the range of (0, 0.2%). In Fig. 10, the transverse chromatic aberration curves observed for a wavelength of 460 nm, a wavelength of 550 nm, and a wavelength of 610 nm, respectively. In general, the zoom projection lens 100 of the present embodiment controls the lateral color difference value of visible light (wavelength ranging from 400 nm to 700 nm) in the range of (-10 um, 10 um). It can be seen that the spherical aberration, field curvature, distortion and lateral chromatic aberration of the zoom projection lens 100 in the telephoto end state can be controlled (corrected) in a small range.
相較於先前技術，本發明的變焦投影鏡頭，利用上述條件式對所述三個非球面塑膠透鏡的光焦度進行合理分配，使得所述三個非球面塑膠透鏡在溫度升高時折射率變化，所導致的所述變焦投影鏡頭後焦距的變化能相互抵消，並且所述變焦投影鏡頭的後焦距保持在最佳的長度，從而有效保證所述變焦投影鏡頭的投影成像品質，同時由於塑膠鏡片的價格便宜，因此降低了所述變焦投影鏡頭的生產成本。 Compared with the prior art, the zoom projection lens of the present invention uses the above conditional expression to reasonably distribute the power of the three aspheric plastic lenses so that the refractive index of the three aspheric plastic lenses increases when the temperature rises. The change of the back focal length of the zoom projection lens can be offset by each other, and the back focus of the zoom projection lens is maintained at an optimal length, thereby effectively ensuring the projection image quality of the zoom projection lens, and at the same time The lens is inexpensive, thus reducing the production cost of the zoom projection lens.
另外，本領域技術人員可在本發明精神內做其他變化，然，凡依據本發明精神實質所做的變化，都應包含在本發明所要求保護的範圍之內。 In addition, those skilled in the art can make other changes within the spirit of the invention, and all changes which are made according to the spirit of the invention should be included in the scope of the invention.
100‧‧‧變焦投影鏡頭 100‧‧‧ zoom projection lens
10‧‧‧第一透鏡組 10‧‧‧First lens group
11‧‧‧第一球面透鏡 11‧‧‧First spherical lens
12‧‧‧第一非球面塑膠透鏡 12‧‧‧First aspheric plastic lens
20‧‧‧第二透鏡組 20‧‧‧second lens group
21‧‧‧第二非球面塑膠透鏡 21‧‧‧Second aspheric plastic lens
22‧‧‧第二球面透鏡 22‧‧‧Second spherical lens
23‧‧‧第三球面透鏡 23‧‧‧ Third spherical lens
30‧‧‧第三透鏡組 30‧‧‧third lens group
31‧‧‧第四球面透鏡 31‧‧‧Fourth spherical lens
40‧‧‧第四透鏡組 40‧‧‧Fourth lens group
41‧‧‧第三非球面塑膠透鏡 41‧‧‧ Third aspheric plastic lens
42‧‧‧第五球面透鏡 42‧‧‧ fifth spherical lens
43‧‧‧第六球面透鏡 43‧‧‧ Sixth spherical lens
44‧‧‧第七球面透鏡 44‧‧‧ seventh spherical lens
50‧‧‧第五透鏡組 50‧‧‧ fifth lens group
51‧‧‧第八球面透鏡 51‧‧‧eightth spherical lens
61‧‧‧成像面 61‧‧‧ imaging surface
70‧‧‧光闌 70‧‧‧Light
80‧‧‧棱鏡 80‧‧ ‧ Prism
91‧‧‧第一平板玻璃 91‧‧‧ first flat glass
92‧‧‧第二平板玻璃 92‧‧‧Second flat glass
93‧‧‧第三平板玻璃 93‧‧‧ Third flat glass
94‧‧‧第四平板玻璃 94‧‧‧Four flat glass
95‧‧‧第五平板玻璃 95‧‧‧ Fifth flat glass
96‧‧‧保護玻璃 96‧‧‧protective glass
圖1為本發明的變焦投影鏡頭處於廣角端狀態時的結構示意圖。 1 is a schematic view showing the structure of a zoom projection lens of the present invention in a wide-angle end state.
圖2為本發明的變焦投影鏡頭處於攝遠端狀態時的結構示意圖。 2 is a schematic structural view of the zoom projection lens of the present invention in a telephoto end state.
圖3為圖1的變焦投影鏡頭的球面像差圖。 3 is a spherical aberration diagram of the zoom projection lens of FIG. 1.
圖4為圖1的變焦投影鏡頭的場曲圖。 4 is a field curvature diagram of the zoom projection lens of FIG. 1.
圖5為圖1的變焦投影鏡頭的畸變圖。 FIG. 5 is a distortion diagram of the zoom projection lens of FIG. 1. FIG.
圖6為圖1的變焦投影鏡頭的橫向色差圖。 6 is a lateral chromatic aberration diagram of the zoom projection lens of FIG. 1.
圖7為圖2的變焦投影鏡頭的球面像差圖。 FIG. 7 is a spherical aberration diagram of the zoom projection lens of FIG. 2. FIG.
圖8為圖2的變焦投影鏡頭的場曲圖。 FIG. 8 is a field curvature diagram of the zoom projection lens of FIG. 2. FIG.
圖9為圖2的變焦投影鏡頭的畸變圖。 9 is a distortion diagram of the zoom projection lens of FIG. 2.
圖10為圖2的變焦投影鏡頭的橫向色差圖。 FIG. 10 is a lateral chromatic aberration diagram of the zoom projection lens of FIG. 2. FIG.
100‧‧‧變焦投影鏡頭 100‧‧‧ zoom projection lens
10‧‧‧第一透鏡組 10‧‧‧First lens group
11‧‧‧第一球面透鏡 11‧‧‧First spherical lens
12‧‧‧第一非球面塑膠透鏡 12‧‧‧First aspheric plastic lens
20‧‧‧第二透鏡組 20‧‧‧second lens group
21‧‧‧第二非球面塑膠透鏡 21‧‧‧Second aspheric plastic lens
22‧‧‧第二球面透鏡 22‧‧‧Second spherical lens
23‧‧‧第三球面透鏡 23‧‧‧ Third spherical lens
30‧‧‧第三透鏡組 30‧‧‧third lens group
31‧‧‧第四球面透鏡 31‧‧‧Fourth spherical lens
40‧‧‧第四透鏡組 40‧‧‧Fourth lens group
41‧‧‧第三非球面塑膠透鏡 41‧‧‧ Third aspheric plastic lens
42‧‧‧第五球面透鏡 42‧‧‧ fifth spherical lens
43‧‧‧第六球面透鏡 43‧‧‧ Sixth spherical lens
44‧‧‧第七球面透鏡 44‧‧‧ seventh spherical lens
50‧‧‧第五透鏡組 50‧‧‧ fifth lens group
51‧‧‧第八球面透鏡 51‧‧‧eightth spherical lens
61‧‧‧成像面 61‧‧‧ imaging surface
70‧‧‧光闌 70‧‧‧Light
80‧‧‧棱鏡 80‧‧ ‧ Prism
91‧‧‧第一平板玻璃 91‧‧‧ first flat glass
92‧‧‧第二平板玻璃 92‧‧‧Second flat glass
93‧‧‧第三平板玻璃 93‧‧‧ Third flat glass
94‧‧‧第四平板玻璃 94‧‧‧Four flat glass
95‧‧‧第五平板玻璃 95‧‧‧ Fifth flat glass
96‧‧‧保護玻璃 96‧‧‧protective glass
Claims (10)
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| TWI402556B true TWI402556B (en) | 2013-07-21 |
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| CN109298512A (en) * | 2018-12-04 | 2019-02-01 | 湖州清维电子科技有限公司 | A kind of short focus engineering projection lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW200912370A (en) * | 2007-09-07 | 2009-03-16 | Hon Hai Prec Ind Co Ltd | Projection lens |
| TW201007206A (en) * | 2008-08-08 | 2010-02-16 | Young Optics Inc | Projection lens |
| TW201028729A (en) * | 2009-01-22 | 2010-08-01 | Young Optics Inc | Zoom lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200912370A (en) * | 2007-09-07 | 2009-03-16 | Hon Hai Prec Ind Co Ltd | Projection lens |
| TW201007206A (en) * | 2008-08-08 | 2010-02-16 | Young Optics Inc | Projection lens |
| TW201028729A (en) * | 2009-01-22 | 2010-08-01 | Young Optics Inc | Zoom lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI831882B (en) * | 2019-12-02 | 2024-02-11 | 揚明光學股份有限公司 | Zoom projection lens |
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