CN102879888B - Fixed focus projection lens - Google Patents
Fixed focus projection lens Download PDFInfo
- Publication number
- CN102879888B CN102879888B CN201110199279.7A CN201110199279A CN102879888B CN 102879888 B CN102879888 B CN 102879888B CN 201110199279 A CN201110199279 A CN 201110199279A CN 102879888 B CN102879888 B CN 102879888B
- Authority
- CN
- China
- Prior art keywords
- lens
- eyeglass
- projection lens
- refractive power
- focus projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lenses (AREA)
Abstract
Description
技术领域 technical field
本发明与投影机有关,更详而言之是指一种定焦投影镜头。The present invention relates to a projector, and more specifically refers to a fixed-focus projection lens.
背景技术 Background technique
近年来,随着影像科技的进步,利用投影机进行简报、视讯、会议或是观赏影片的人越来越多。而为使投影机能更便于携带与使用,其用以将影像清晰地呈现在屏幕上的定焦投影镜头的体积也将被大幅地缩小,以满足人们所期望的小型化及轻量化的需求,再者,除了小型化与轻量化外,也要能够具有更高的光学效能,才能使达成高分辨率和高对比的影像展现。因此,小型化和高光学效能是定焦投影镜头不可缺两项要件。In recent years, with the advancement of imaging technology, more and more people use projectors for presentations, video conferences, conferences or watching videos. In order to make the projector more portable and easy to use, the size of the fixed-focus projection lens used to clearly present the image on the screen will also be greatly reduced to meet the needs of miniaturization and light weight that people expect. Furthermore, in addition to miniaturization and light weight, higher optical performance is also required to achieve high-resolution and high-contrast image display. Therefore, miniaturization and high optical performance are two indispensable elements of a fixed-focus projection lens.
然而,已知的定焦投影镜头通常包含有三组以上的镜群,且该些镜群间须隔有一定间隔,同时该些镜群皆又包含有复数片透镜,该些透镜间大多又间隔有一定距离。因此,已知的定焦投影镜头不仅体积大且重量重,而无法达成小型化与轻量化的设计,更因其内部镜群与透镜较多,故制作时需耗费较长的组立工时,且所耗费的材料成本亦不易降低。综合以上所述可得知,已知的定焦投影镜头仍未臻完善,且有待改进之处。However, the known fixed-focus projection lens usually includes more than three sets of mirror groups, and there must be a certain interval between these mirror groups. At the same time, these mirror groups all include a plurality of lenses. There is a certain distance. Therefore, the known fixed-focus projection lens is not only large in size and heavy in weight, but cannot achieve a miniaturized and lightweight design, and because there are many internal mirror groups and lenses, it takes a long time to assemble and assemble. And the cost of materials consumed is not easy to reduce. Based on the above, it can be seen that the known fixed-focus projection lens is still not perfect and needs to be improved.
发明内容 Contents of the invention
本发明要解决的技术问题在于,针对现有技术中的定焦投影镜头的镜群较多的缺陷,提供一种定焦投影镜头,由两组镜群所组成,不仅体积小,且具有高光学效能。The technical problem to be solved by the present invention is to provide a fixed-focus projection lens consisting of two sets of mirror groups, which is not only small in size, but also has high Optical performance.
本发明为解决其技术问题所采用的技术方案是,提供一种定焦投影镜头,包含有沿光轴且由成像侧至像源侧依序排列的第一镜群以及第二镜群,其中,该第一镜群具有正屈光力,且包含有由该成像侧至该像源侧依序排列的第一镜片以及第二镜片;该第一镜片由塑料材质制成,且具有负屈光力;该第二镜片由玻璃材质制成,且具有正屈光力;该第二镜群具有正屈光力,且包含有由该成像侧至该像源侧依序排列的第三镜片、第四镜片、第五镜片、第六镜片以及第七镜片;该第三镜片由塑料材质制成,且具有负屈光力;该第四镜片由玻璃材质制成,且具有负屈光力;该第五镜片由玻璃材质制成,且具有正屈光力,且该第五镜片与该第四镜片胶合构成具有负屈光力的复合透镜;该第六镜片由塑料材质制成,且具有正屈光力;该第七镜片由玻璃材质制成,且具有负屈光力。The technical solution adopted by the present invention to solve the technical problem is to provide a fixed-focus projection lens, which includes a first mirror group and a second mirror group arranged in sequence along the optical axis from the imaging side to the image source side, wherein , the first lens group has positive refractive power, and includes a first lens and a second lens arranged in sequence from the imaging side to the image source side; the first lens is made of plastic material and has negative refractive power; the The second lens is made of glass material and has positive refractive power; the second lens group has positive refractive power and includes a third lens, a fourth lens, and a fifth lens arranged in sequence from the imaging side to the image source side , the sixth lens and the seventh lens; the third lens is made of plastic material and has negative refractive power; the fourth lens is made of glass material and has negative refractive power; the fifth lens is made of glass material and has negative refractive power; It has positive refractive power, and the fifth lens is cemented with the fourth lens to form a composite lens with negative refractive power; the sixth lens is made of plastic material and has positive refractive power; the seventh lens is made of glass material and has Negative refractive power.
藉此,利用上述镜片设计使该定焦投影镜头具有达到小型化与高光学效能的目的。Therefore, the fixed-focus projection lens achieves miniaturization and high optical performance by utilizing the above-mentioned lens design.
附图说明 Description of drawings
图1为本发明第一较佳实施例的镜片配置图;Fig. 1 is the lens arrangement diagram of the first preferred embodiment of the present invention;
图2A为本发明第一较佳实施例的场曲图;Fig. 2A is the field curvature diagram of the first preferred embodiment of the present invention;
图2B为本发明第一较佳实施例的畸变图;Fig. 2B is a distortion diagram of the first preferred embodiment of the present invention;
图2C为本发明第一较佳实施例的纵向色差图;Figure 2C is a longitudinal color difference diagram of the first preferred embodiment of the present invention;
图2D为本发明第一较佳实施例的光扇图;FIG. 2D is an optical fan diagram of the first preferred embodiment of the present invention;
图2E为本发明第一较佳实施例的空间频率调制传递函数图;FIG. 2E is a spatial frequency modulation transfer function diagram of the first preferred embodiment of the present invention;
图3为本发明第二较佳实施例的镜片配置图;Fig. 3 is the lens arrangement diagram of the second preferred embodiment of the present invention;
图4A为本发明第二较佳实施例的场曲图;FIG. 4A is a field curvature diagram of the second preferred embodiment of the present invention;
图4B为本发明第二较佳实施例的畸变图;Fig. 4B is a distortion diagram of the second preferred embodiment of the present invention;
图4C为本发明第二较佳实施例的纵向色差图;Figure 4C is a longitudinal color difference diagram of the second preferred embodiment of the present invention;
图4D为本发明第二较佳实施例的光扇图;FIG. 4D is an optical fan diagram of the second preferred embodiment of the present invention;
图4E为本发明第二较佳实施例的空间频率调制传递函数图。FIG. 4E is a diagram of the spatial frequency modulation transfer function of the second preferred embodiment of the present invention.
具体实施方式 Detailed ways
为能更清楚地说明本发明,兹举较佳实施例并配合附图详细说明如后。In order to illustrate the present invention more clearly, preferred embodiments are given and described in detail with accompanying drawings as follows.
请参阅图1,为本发明第一较佳实施例定焦投影镜头1的镜片配置图,该定焦投影镜头1包含有沿光轴Z且由成像侧至像源侧依序排列的第一镜群G1以及第二镜群G2。另外,该第二镜群G2至像源侧之间更依序设有内部全反射棱镜TP(Total internal reflection Prism)以及玻璃覆盖CG(Cover Glass),其功用属现有技艺,于此容不再赘述。其中:Please refer to FIG. 1 , which is a lens configuration diagram of a fixed-focus projection lens 1 according to a first preferred embodiment of the present invention. The mirror group G1 and the second mirror group G2. In addition, an internal total reflection prism TP (Total internal reflection Prism) and a glass cover CG (Cover Glass) are arranged sequentially between the second mirror group G2 and the image source side. Let me repeat. in:
该第一镜群G1具有正屈光力,且包含有由成像侧至像源侧依序排列的第一镜片L1以及第二镜片L2。该第一镜片L1由塑料材质制成。该第一镜片L1为具有负屈光力的新月型透镜,其凸面R1朝向成像侧,且其凸面R1与凹面R2皆为非球面表面。该第二镜片L2由玻璃材质制成。该第二镜片L2为具有正屈光力的新月型透镜,且其凸面R3朝向成像侧。The first lens group G1 has positive refractive power, and includes a first lens L1 and a second lens L2 arranged in sequence from the imaging side to the image source side. The first lens L1 is made of plastic material. The first lens L1 is a crescent lens with negative refractive power. The convex surface R1 faces the imaging side, and both the convex surface R1 and the concave surface R2 are aspheric surfaces. The second lens L2 is made of glass material. The second lens L2 is a crescent lens with positive refractive power, and its convex surface R3 faces the imaging side.
该第二镜群G2具有正屈光力,且包含有由成像侧至像源侧依序排列的第三镜片L3、第四镜片L4、第五镜片L5、第六镜片L6以及第七镜片L7。该第三镜片L3由塑料材质制成。该第三镜片L3为具有负屈光力的新月型透镜,其凸面R5朝向成像侧,且其凸面R5与凹面R6皆为非球面表面。另外,该定焦投影镜头1的光圈ST位于该第三镜片L3的凸面R5上。该第四镜片L4由玻璃材质制成。该第四镜片L4为具有负屈光力的双凹透镜。该第五镜片L5由玻璃材质制成。该第五镜片L5为具有正屈光力的双凸透镜,且该第五镜片L5与该第四镜片L4胶合构成具有负屈光力的复合透镜L45。该第六镜片L6由塑料材质制成。该第六镜片L6为具有正屈光力的双凸透镜,且其两个凸面R10、R11皆为非球面表面。该第七镜片L7由玻璃材质制成。该第七镜片L7为具有正屈光力的双凸透镜。The second lens group G2 has positive refractive power and includes a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 and a seventh lens L7 arranged in sequence from the imaging side to the image source side. The third lens L3 is made of plastic material. The third lens L3 is a crescent lens with negative refractive power, its convex surface R5 faces the imaging side, and its convex surface R5 and concave surface R6 are both aspherical surfaces. In addition, the aperture ST of the fixed-focus projection lens 1 is located on the convex surface R5 of the third lens L3. The fourth lens L4 is made of glass material. The fourth lens L4 is a biconcave lens with negative refractive power. The fifth lens L5 is made of glass material. The fifth lens L5 is a biconvex lens with positive refractive power, and the fifth lens L5 is cemented with the fourth lens L4 to form a composite lens L45 with negative refractive power. The sixth lens L6 is made of plastic material. The sixth lens L6 is a biconvex lens with positive refractive power, and its two convex surfaces R10 and R11 are both aspheric surfaces. The seventh lens L7 is made of glass material. The seventh lens L7 is a biconvex lens with positive refractive power.
另外,为了有效的缩减该定焦投影镜头1总长及体积,并修正像差,以达到较佳的成像质量,该定焦投影镜头1满足有下列条件:In addition, in order to effectively reduce the total length and volume of the fixed-focus projection lens 1 and correct aberrations to achieve better imaging quality, the fixed-focus projection lens 1 satisfies the following conditions:
(1)1.75<|F1/F|<1.83(1) 1.75<|F1/F|<1.83
(2)0.80<|F2/F|<0.82(2) 0.80<|F2/F|<0.82
(3)1.95<|FL1/F|<2.33(3) 1.95<|FL1/F|<2.33
(4)0.57<|v4/v5|<0.61(4) 0.57<|v4/v5|<0.61
(5)8.50<|ex/lt|<17.0(5) 8.50<|ex/lt|<17.0
(6)NdL2>1.80(6) Nd L2 > 1.80
其中,F为该定焦投影镜头1的焦距;F1为该第一镜群G1的焦距;F2为该第二镜群G2的焦距;FL1为该第一镜片L1的焦距;v4为该第四镜片L4的色散系数;v5为该第五镜片L5的色散系数;ex为该定焦投影镜头1的出瞳位置(exit pupil position);lt为该定焦投影镜头1的长度;NdL2为该第二镜片L2的折射率(refractive index)。Wherein, F is the focal length of the fixed-focus projection lens 1; F1 is the focal length of the first lens group G1; F2 is the focal length of the second lens group G2; FL1 is the focal length of the first lens L1; v4 is the fourth The dispersion coefficient of the lens L4; v5 is the dispersion coefficient of the fifth lens L5; ex is the exit pupil position (exit pupil position) of the fixed-focus projection lens 1; lt is the length of the fixed-focus projection lens 1; Nd L2 is the The refractive index of the second lens L2.
为达上述目的并有效提升该定焦投影镜头1的光学效能,本发明第一实施例的定焦投影镜头1的焦距F(Focus Length)、数值孔径FNO(F-number)、各个镜片表面的光轴Z通过处的曲率半径(radius of curvature)、各镜片之间距、各镜片的折射率Nd(refractive index)及各镜片的阿贝系数Vd(Abbenumber),如表一所示:In order to achieve the above-mentioned purpose and effectively improve the optical performance of the fixed-focus projection lens 1, the focal length F (Focus Length), the numerical aperture FNO (F-number), and the number of each lens surface of the fixed-focus projection lens 1 of the first embodiment of the present invention The radius of curvature where the optical axis Z passes, the distance between each lens, the refractive index Nd (refractive index) of each lens and the Abbe number Vd (Abbe number) of each lens are shown in Table 1:
表一Table I
本实施例的各个镜片中,这些非球面表面R1、R2、R5、R6、R10及R11的表面凹陷度D由下列公式所得到:In each lens of the present embodiment, the surface concavity D of these aspheric surfaces R1, R2, R5, R6, R10 and R11 is obtained by the following formula:
D:非球面表面的凹陷度;D: Concavity of the aspheric surface;
C:曲率半径的倒数;C: the reciprocal of the radius of curvature;
H:表面的孔径半径;H: Aperture radius of the surface;
K:圆锥系数;K: conical coefficient;
E4~E16:表面的孔径半径H的各阶系数。E4~E16: Each order coefficient of the hole radius H on the surface.
在本实施例中,各个非球面表面的圆锥系数K(conic constant)及表面孔径半径H的各阶系数E4~E16如表二所示:In this embodiment, the conic coefficient K (conic constant) of each aspheric surface and the coefficients E4 to E16 of each order of the surface aperture radius H are shown in Table 2:
表二Table II
藉由上述的镜片与光圈的配置,使得本实施例的定焦投影镜头1不但可有效缩小体积以满足轻量化影像装置的需求,在成像质量上也可达到要求,这可从图2A至图2E看出。With the configuration of the above-mentioned lenses and apertures, the fixed-focus projection lens 1 of this embodiment can not only effectively reduce the size to meet the needs of lightweight imaging devices, but also meet the requirements in terms of imaging quality, which can be seen from FIG. 2A to FIG. 2E sees.
图2A所示的,是本实施例的定焦投影镜头1的场曲(Field Curvature)图;图2B所示的,是本实施例的定焦投影镜头1的畸变(Distortion)图;图2C所示的,是本实施例的定焦投影镜头1的纵向色差(Longitudinal)图;图2D所示的,是本实施例的定焦投影镜头1的光扇(Ray Fan)图;图2E所示的,是本实施例的定焦投影镜头1的空间频率调制传递函数图(Spatial Frequency MTF)。Shown in Fig. 2A, is the field curvature (Field Curvature) figure of the fixed-focus projection lens 1 of the present embodiment; Shown in Fig. 2B, is the distortion (Distortion) figure of the fixed-focus projection lens 1 of the present embodiment; Fig. 2C Shown is the longitudinal chromatic aberration (Longitudinal) diagram of the fixed-focus projection lens 1 of the present embodiment; shown in FIG. 2D is the light fan (Ray Fan) diagram of the fixed-focus projection lens 1 of the present embodiment; FIG. 2E Shown is the spatial frequency modulation transfer function diagram (Spatial Frequency MTF) of the fixed-focus projection lens 1 of the present embodiment.
由图2A可看出,本实施例的最大场曲不超过0.06mm和-0.04mm;由图2B可看出,本实施例的畸变量不超过1.2%;由图2C可看出,本实施例的最大纵向色差最大不超过0.04mm和-0.02mm;由图2D可看出,本实施例无论在哪个视场位置都具有良好的分辨率;由图2E可看出,本实施例在80lp/mm的时候,其调制光学传递函数值仍维持在40%以上,显见本实施例的定焦投影镜头1的分辨率是符合标准的。It can be seen from Figure 2A that the maximum field curvature of this embodiment does not exceed 0.06mm and -0.04mm; it can be seen from Figure 2B that the distortion of this embodiment does not exceed 1.2%; it can be seen from Figure 2C that this embodiment The maximum longitudinal chromatic aberration of the example is not more than 0.04mm and -0.02mm; as can be seen from Figure 2D, this embodiment has good resolution no matter in which field of view position; it can be seen from Figure 2E that this embodiment has a /mm, the value of the modulation optical transfer function is still above 40%, which shows that the resolution of the fixed-focus projection lens 1 of this embodiment is in compliance with the standard.
以上所述的,是本发明第一较佳实施例的定焦投影镜头1;依据本发明的技术,以下配合图3说明本发明第二较佳实施例的定焦投影镜头2。The above is the fixed-focus projection lens 1 of the first preferred embodiment of the present invention; according to the technology of the present invention, the fixed-focus projection lens 2 of the second preferred embodiment of the present invention will be described below with reference to FIG. 3 .
该定焦投影镜头2包含有沿光轴Z且由成像侧至像源侧依序排列的第一镜群G1以及第二镜群G2。另外,该第二镜群G2至像源侧之间同样依序设有内部全反射棱镜TP(Total internal reflection Prism)以及玻璃覆盖CG(CoverGlass)。其中:The fixed-focus projection lens 2 includes a first lens group G1 and a second lens group G2 arranged in sequence along the optical axis Z from the imaging side to the image source side. In addition, an internal total reflection prism TP (Total internal reflection Prism) and a glass cover CG (CoverGlass) are also arranged sequentially between the second mirror group G2 and the image source side. in:
该第一镜群G1具有正屈光力,且包含有由成像侧至像源侧依序排列的第一镜片L1以及第二镜片L2。该第一镜片L1由塑料材质制成。该第一镜片L1为具有负屈光力的新月型透镜,其凸面R1朝向成像侧,且其凸面R1与凹面R2皆为非球面表面。该第二镜片L2由玻璃材质制成。该第二镜片L2为具有正屈光力的新月型透镜,且其凸面R3朝向成像侧。The first lens group G1 has positive refractive power, and includes a first lens L1 and a second lens L2 arranged in sequence from the imaging side to the image source side. The first lens L1 is made of plastic material. The first lens L1 is a crescent lens with negative refractive power. The convex surface R1 faces the imaging side, and both the convex surface R1 and the concave surface R2 are aspheric surfaces. The second lens L2 is made of glass material. The second lens L2 is a crescent lens with positive refractive power, and its convex surface R3 faces the imaging side.
该第二镜群G2具有正屈光力,且包含有由成像侧至像源侧依序排列的第三镜片L3、第四镜片L4、第五镜片L5、第六镜片L6以及第七镜片L7。该第三镜片L3由塑料材质制成。该第三镜片L3为具有负屈光力的新月型透镜,其凸面R5朝向成像侧,且其凸面R5与凹面R6皆为非球面表面。另外,该定焦投影镜头2的光圈ST位于该第三镜片L3的凸面R5上。该第四镜片L4由玻璃材质制成。该第四镜片L4为具有负屈光力的双凹透镜。该第五镜片L5由玻璃材质制成。该第五镜片L5为具有正屈光力的双凸透镜,且该第五镜片L5与该第四镜片L4胶合构成具有负屈光力的复合透镜L45。该第六镜片L6由塑料材质制成。该第六镜片L6为具有正屈光力的双凸透镜,且其两个凸面R10、R11皆为非球面表面。该第七镜片L7由玻璃材质制成。该第七镜片L7为具有正屈光力的双凸透镜。The second lens group G2 has positive refractive power and includes a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 and a seventh lens L7 arranged in sequence from the imaging side to the image source side. The third lens L3 is made of plastic material. The third lens L3 is a crescent lens with negative refractive power, its convex surface R5 faces the imaging side, and its convex surface R5 and concave surface R6 are both aspherical surfaces. In addition, the aperture ST of the fixed-focus projection lens 2 is located on the convex surface R5 of the third lens L3. The fourth lens L4 is made of glass material. The fourth lens L4 is a biconcave lens with negative refractive power. The fifth lens L5 is made of glass material. The fifth lens L5 is a biconvex lens with positive refractive power, and the fifth lens L5 is cemented with the fourth lens L4 to form a composite lens L45 with negative refractive power. The sixth lens L6 is made of plastic material. The sixth lens L6 is a biconvex lens with positive refractive power, and its two convex surfaces R10 and R11 are both aspheric surfaces. The seventh lens L7 is made of glass material. The seventh lens L7 is a biconvex lens with positive refractive power.
同样地,为了有效的缩减该定焦投影镜头2总长及体积,并修正像差,以达到较佳的成像质量,该定焦投影镜头2亦满足有下列条件:Similarly, in order to effectively reduce the total length and volume of the fixed-focus projection lens 2 and correct aberrations to achieve better imaging quality, the fixed-focus projection lens 2 also meets the following conditions:
(1)1.75<|F1/F|<1.83(1) 1.75<|F1/F|<1.83
(2)0.80<|F2/F|<0.82(2) 0.80<|F2/F|<0.82
(3)1.95<|FL1/F|<2.33(3) 1.95<|FL1/F|<2.33
(4)0.57<|v4/v5|<0.61(4) 0.57<|v4/v5|<0.61
(5)8.50<|ex/lt|<17.0(5) 8.50<|ex/lt|<17.0
(6)NdL2>1.80(6) Nd L2 > 1.80
其中,F为该定焦投影镜头2的焦距;F1为该第一镜群G1的焦距;F2为该第二镜群G2的焦距;FL1为该第一镜片L1的焦距;v4为该第四镜片L4的色散系数;v5为该第五镜片L5的色散系数;ex为该定焦投影镜头2的出瞳位置(exit pupil position);lt为该定焦投影镜头2的长度;NdL2为该第二镜片L2的折射率(refractive index)。Wherein, F is the focal length of the fixed-focus projection lens 2; F1 is the focal length of the first lens group G1; F2 is the focal length of the second lens group G2; FL1 is the focal length of the first lens L1; v4 is the fourth The dispersion coefficient of the lens L4; v5 is the dispersion coefficient of the fifth lens L5; ex is the exit pupil position (exit pupil position) of the fixed-focus projection lens 2; lt is the length of the fixed-focus projection lens 2; Nd L2 is the The refractive index of the second lens L2.
为达上述目的并有效提升该定焦投影镜头2的光学效能,本发明第二实施例的定焦投影镜头2的焦距F(Focus Length)、数值孔径FNO(F-number)、各个镜片表面的光轴Z通过处的曲率半径(radius of curvature)、各镜片之间距、各镜片的折射率Nd(refractive index)及各镜片的阿贝系数Vd(Abbenumber),如表三所示:In order to achieve the above-mentioned purpose and effectively improve the optical performance of the fixed-focus projection lens 2, the focal length F (Focus Length), the numerical aperture FNO (F-number), the surface of each lens of the fixed-focus projection lens 2 of the second embodiment of the present invention The radius of curvature where the optical axis Z passes, the distance between each lens, the refractive index Nd (refractive index) of each lens and the Abbe number Vd (Abbe number) of each lens are shown in Table 3:
表三Table three
本实施例的各个镜片中,这些非球面表面R1、R2、R5、R6、R10及R11的表面凹陷度D由下列公式所得到:In each lens of the present embodiment, the surface concavity D of these aspheric surfaces R1, R2, R5, R6, R10 and R11 is obtained by the following formula:
D:非球面表面的凹陷度;D: Concavity of the aspheric surface;
C:曲率半径的倒数;C: the reciprocal of the radius of curvature;
H:表面的孔径半径;H: Aperture radius of the surface;
K:圆锥系数;K: conical coefficient;
E4~E16:表面的孔径半径H的各阶系数。E4~E16: Each order coefficient of the hole radius H on the surface.
在本实施例中,各个非球面表面的圆锥系数K(conic constant)及表面孔径半径H的各阶系数E4~E16如表四所示:In this embodiment, the conic coefficient K (conic constant) of each aspheric surface and the coefficients E4 to E16 of each order of the surface aperture radius H are shown in Table 4:
表四Table four
藉由上述的镜片与光圈的配置,使得本实施例的定焦投影镜头2不但可有效缩小体积以满足轻量化影像装置的需求,在成像质量上也可达到要求,这可从图4A至图4E看出。With the configuration of the above-mentioned lenses and apertures, the fixed-focus projection lens 2 of this embodiment can not only effectively reduce the size to meet the needs of lightweight imaging devices, but also meet the requirements in terms of imaging quality, which can be seen from FIG. 4A to FIG. 4E sees.
图4A所示的,是本实施例的定焦投影镜头2的场曲(Field Curvature)图;图4B所示的,是本实施例的定焦投影镜头2的畸变(Distortion)图;图4C所示的,是本实施例的定焦投影镜头2的纵向色差(Longitudinal)图;图4D所示的,是本实施例的定焦投影镜头2的光扇(Ray Fan)图;图4E所示的,是本实施例的定焦投影镜头2的空间频率调制传递函数图(Spatial Frequency MTF)。Shown in Figure 4A is the field curvature (Field Curvature) figure of the fixed-focus projection lens 2 of the present embodiment; Shown in Figure 4B is the distortion (Distortion) figure of the fixed-focus projection lens 2 of the present embodiment; Figure 4C Shown is the longitudinal chromatic aberration (Longitudinal) diagram of the fixed-focus projection lens 2 of the present embodiment; shown in FIG. 4D is the light fan (Ray Fan) diagram of the fixed-focus projection lens 2 of the present embodiment; FIG. 4E Shown is the spatial frequency modulation transfer function diagram (Spatial Frequency MTF) of the fixed-focus projection lens 2 of the present embodiment.
由图4A可看出,本实施例的最大场曲不超过0.08mm和-0.02mm;由图4B可看出,本实施例的畸变量不超过1.2%;由图4C可看出,本实施例的最大纵向色差最大不超过0.05mm和-0.02mm;由图4D可看出,本实施例无论在哪个视场位置都具有良好的分辨率;由图4E可看出,本实施例在80lp/mm的时候,其调制光学传递函数值仍维持在30%以上,显见本实施例的定焦投影镜头2的分辨率是符合标准的。It can be seen from Figure 4A that the maximum field curvature of this embodiment does not exceed 0.08mm and -0.02mm; it can be seen from Figure 4B that the distortion of this embodiment does not exceed 1.2%; it can be seen from Figure 4C that this embodiment The maximum longitudinal chromatic aberration of the example does not exceed 0.05mm and -0.02mm at most; it can be seen from Figure 4D that this embodiment has good resolution no matter in which field of view position; it can be seen from Figure 4E that this embodiment can /mm, the value of the modulation optical transfer function is still above 30%, which shows that the resolution of the fixed-focus projection lens 2 of this embodiment meets the standard.
综合以上所可得知,本发明的定焦投影镜头不仅可以有效地缩小体积且同时可具有高光学效能。Based on the above, it can be seen that the fixed-focus projection lens of the present invention can not only effectively reduce the size but also have high optical performance.
以上所述仅为本发明较佳可行实施例而已,凡应用本发明说明书及权利要求所做的等效结构及制作方法变化,理应包含在本发明的专利范围内。The above description is only a preferred feasible embodiment of the present invention, and any equivalent structure and manufacturing method changes made by applying the specification and claims of the present invention should be included in the patent scope of the present invention.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110199279.7A CN102879888B (en) | 2011-07-15 | 2011-07-15 | Fixed focus projection lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110199279.7A CN102879888B (en) | 2011-07-15 | 2011-07-15 | Fixed focus projection lens |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102879888A CN102879888A (en) | 2013-01-16 |
CN102879888B true CN102879888B (en) | 2014-12-17 |
Family
ID=47481273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201110199279.7A Expired - Fee Related CN102879888B (en) | 2011-07-15 | 2011-07-15 | Fixed focus projection lens |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102879888B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116125637A (en) * | 2022-12-22 | 2023-05-16 | 歌尔光学科技有限公司 | Projection lens and projection device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101295070A (en) * | 2007-04-26 | 2008-10-29 | 亚洲光学股份有限公司 | zoom lens |
CN101339290A (en) * | 2007-07-02 | 2009-01-07 | 大立光电股份有限公司 | zoom lens |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5009571B2 (en) * | 2006-08-28 | 2012-08-22 | 富士フイルム株式会社 | Zoom lens |
TWI299408B (en) * | 2006-08-31 | 2008-08-01 | Asia Optical Co Inc | Zoom lens system |
JP2008164724A (en) * | 2006-12-27 | 2008-07-17 | Sony Corp | Zoom lens and imaging apparatus |
JP2008203449A (en) * | 2007-02-19 | 2008-09-04 | Sony Corp | Zoom lens and imaging apparatus |
KR101431538B1 (en) * | 2007-12-24 | 2014-09-19 | 삼성전자주식회사 | Zoom lens system |
-
2011
- 2011-07-15 CN CN201110199279.7A patent/CN102879888B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101295070A (en) * | 2007-04-26 | 2008-10-29 | 亚洲光学股份有限公司 | zoom lens |
CN101339290A (en) * | 2007-07-02 | 2009-01-07 | 大立光电股份有限公司 | zoom lens |
Also Published As
Publication number | Publication date |
---|---|
CN102879888A (en) | 2013-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI437312B (en) | Image capturing lens system | |
CN103185956B (en) | Miniature projection lens | |
TWI424215B (en) | Image pickup optical system | |
US8576502B2 (en) | Miniaturized lens assembly | |
TWI443404B (en) | Fixed focus projection lens | |
CN101726833B (en) | Projection lens | |
CN104516090A (en) | Wide-angle imaging lens group | |
TW201702675A (en) | Image capturing lens system, image capturing apparatus and electronic device | |
TW201317620A (en) | Optical image collecting system | |
CN104503069A (en) | Optical Image Capturing Lens Assembly | |
CN106125255A (en) | Pick-up lens | |
JP2012159841A (en) | Imaging microlens | |
TW201743101A (en) | Fixed-focus projection lens capable of lowering a spherical aberration of spherical lens, shortening length of the optical system, and effectively reducing distortion | |
JP2013125057A (en) | Projection lens | |
CN103869450B (en) | LED digital micro projector projection lens | |
US20160161722A1 (en) | Imaging lens | |
CN105892056A (en) | Relay optical system for head display | |
CN102540422B (en) | Miniature projection lens | |
CN102566020B (en) | Miniaturized Zoom Lens | |
TWI431353B (en) | Fixed focus projection lens | |
CN102854611B (en) | Micro Imaging Lenses | |
CN103064169B (en) | Capture lens | |
TWI682213B (en) | Optical lens | |
CN103676095B (en) | Five-piece imaging lens set | |
TWI460466B (en) | Zoomable short focus projection lens |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 |