WO2013071676A1 - High-resolution wide-angle projection lens and projector - Google Patents

High-resolution wide-angle projection lens and projector Download PDF

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Publication number
WO2013071676A1
WO2013071676A1 PCT/CN2011/084807 CN2011084807W WO2013071676A1 WO 2013071676 A1 WO2013071676 A1 WO 2013071676A1 CN 2011084807 W CN2011084807 W CN 2011084807W WO 2013071676 A1 WO2013071676 A1 WO 2013071676A1
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lens
convex
double
concave
positive lens
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PCT/CN2011/084807
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French (fr)
Chinese (zh)
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刘美鸿
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深圳市亿思达显示科技有限公司
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/04—Reversed telephoto objectives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV

Definitions

  • the invention relates to the field of optical technology, in particular to a high resolution wide-angle projection lens and a projector.
  • the projection lens commonly used has a large focal length, a small field of view, and the angle of view is generally less than 60 degrees, so the projection ratio (Throw) Ratio) is larger and the projection ratio is generally greater than 2.
  • the projection ratio (Throw) Ratio)
  • the projected image is less than 50 inches, which does not satisfactorily meet the requirement of projecting a larger image in a small space.
  • the technical problem to be solved by the present invention is to provide a high resolution wide-angle projection lens and a projector capable of correcting chromatic aberration, improving contrast and uniformity.
  • a technical solution adopted by the present invention is to provide a high resolution wide-angle projection lens whose focal length projection ratio is less than 0.6, and includes:
  • the first lens group includes a first convex-concave negative lens, a convex-concave aspherical mirror, and a convex-concave aspherical mirror sequentially disposed in the first direction a second convex-concave negative lens, or a first convex-concave negative lens, a convex-concave aspherical mirror, and a first double concave negative lens sequentially disposed in the first direction.
  • the focal length of the first lens group is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens focal length is F1-1, F1-1 is between -120 mm and -110 mm; convex-concave aspherical mirror focal length is F1-2, F1-2 Between -55 mm and -45 mm; second convex-concave negative lens or first double concave negative lens focal length F1-3, F1-3 between -40 mm and -30 mm, material of convex-concave aspherical mirror
  • the refractive index of the first convex-concave negative lens material is n1-1, n1-1 is between 1.48 and 1.62; the refractive index of the second convex-concave negative lens or the first double concave negative lens material is n1-3, N1-3 is between 1.6 and 1.7.
  • the second lens group includes a third convex-concave negative lens, a first double convex positive lens, and a second double convex positive lens which are sequentially disposed in the first direction.
  • the focal length of the second lens group is F2, F2 is between 30 mm and 40 mm; the focal length of the third convex-concave negative lens is F2-1, and the F2-1 is between 75 mm and 85 mm.
  • the first double convex positive lens has a focal length of F2-2, F2-2 is between 75 mm and 85 mm; the second double convex positive lens has a focal length of F2-3, and F2-3 is between 60 mm and 80 mm.
  • the third lens group includes a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, a fourth double convex positive lens, and a fifth double which are sequentially disposed in the first direction.
  • a convex positive lens, a sixth double convex positive lens, and a seventh double convex positive lens or a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and a fourth double convex which are sequentially disposed in the first direction
  • the focal length of the third lens group is F3, F3 is between 40 mm and 50 mm; the focal length of the third biconvex positive lens is F3-1, and the F3-1 is between -300 mm and -200.
  • fourth concave and convex negative lens focal length is F3-2, F3-2 is between -300 mm and -200 mm; second double concave negative lens focal length is F3-3, F3-3 is between -100 mm Between -80 mm; the fourth double convex positive lens focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth double convex positive lens or the fifth concave positive lens positive focal length is F3- 5, F3-5 is between 140 mm and 160 mm; the sixth double convex positive lens focal length is F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens focal length is F3- 7, F3-7 is between 35 mm and 45 mm, the third biconvex positive lens material has a refractive index n3-1, n3-1 is between 1.48 and -1.52; the refraction of the fourth concave and negative negative lens material The ratio is n3-2, n3-2 is between 1.8
  • the seventh double convex positive lens material has a refractive index of n3-7, n3-7 is between 1.8 and 1.85, a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and The four double convex positive lenses are glued combinations.
  • another technical solution adopted by the present invention is to provide a high-resolution wide-angle projection lens having a focal length projection ratio of less than 0.6, and including: a first lens group and a second lens sequentially disposed in the first direction a lens group, an aperture, and a third lens group.
  • the lens comprises a prism combination disposed in front of the third lens group with reference to the first direction.
  • the first lens group includes a first convex-concave negative lens, a convex-concave aspherical mirror, and a second convex-concave negative lens which are sequentially disposed in the first direction, or a first convex-concave negative lens sequentially disposed in the first direction, A convex-concave aspherical mirror and a first double concave negative lens.
  • the focal length of the first lens group is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens focal length is F1-1, F1-1 is between -120 mm and -110 mm; convex-concave aspherical mirror focal length is F1-2, F1-2 Between -55 mm and -45 mm; second convex-concave negative lens or first double concave negative lens focal length F1-3, F1-3 between -40 mm and -30 mm, material of convex-concave aspherical mirror
  • the refractive index of the first convex-concave negative lens material is n1-1, n1-1 is between 1.48 and 1.62; the refractive index of the second convex-concave negative lens or the first double concave negative lens material is n1-3, N1-3 is between 1.6 and 1.7.
  • the second lens group includes a third convex-concave negative lens, a first double convex positive lens, and a second double convex positive lens which are sequentially disposed in the first direction.
  • the focal length of the second lens group is F2, F2 is between 30 mm and 40 mm; the focal length of the third convex-concave negative lens is F2-1, and the F2-1 is between 75 mm and 85 mm.
  • the first double convex positive lens has a focal length of F2-2, F2-2 is between 75 mm and 85 mm; the second double convex positive lens has a focal length of F2-3, and F2-3 is between 60 mm and 80 mm.
  • the refractive index of the third convex-concave negative lens material is n2-1, and n2-1 is between 1.8 and 1.85;
  • the first biconvex positive lens material has a refractive index of n2-2, n2-2 is between 1.75 and 1.81;
  • the second biconvex positive lens material has a refractive index of n2-3, and n2-3 is between 1.6 and 1.66.
  • the third convex-concave negative lens and the first double convex positive lens are combined in a glue or a double separation.
  • the third lens group includes a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, a fourth double convex positive lens, and a fifth double which are sequentially disposed in the first direction.
  • a convex positive lens, a sixth double convex positive lens, and a seventh double convex positive lens or a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and a fourth double convex which are sequentially disposed in the first direction
  • the focal length of the third lens group is F3, F3 is between 40 mm and 50 mm; the focal length of the third biconvex positive lens is F3-1, and the F3-1 is between -300 mm and -200.
  • fourth concave and convex negative lens focal length is F3-2, F3-2 is between -300 mm and -200 mm; second double concave negative lens focal length is F3-3, F3-3 is between -100 mm Between -80 mm; the fourth double convex positive lens focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth double convex positive lens or the fifth concave positive lens positive focal length is F3- 5, F3-5 is between 140 mm and 160 mm; the sixth double convex positive lens focal length is F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens focal length is F3- 7, F3-7 is between 35 mm and 45 mm, the third biconvex positive lens material has a refractive index n3-1, n3-1 is between 1.48 and -1.52; the refraction of the fourth concave and negative negative lens material The ratio is n3-2, n3-2 is between 1.8
  • the seventh double convex positive lens material has a refractive index of n3-7, n3-7 is between 1.8 and 1.85, a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and The four double convex positive lenses are glued combinations.
  • another technical solution adopted by the present invention is to provide a high resolution wide-angle projector, including a projection chip and a high resolution wide-angle projection lens, which are referenced by the first direction and are set by the projection chip.
  • a high resolution wide-angle projector including a projection chip and a high resolution wide-angle projection lens, which are referenced by the first direction and are set by the projection chip.
  • the third lens group In front of the third lens group.
  • the projector comprises a combination of prisms between the third lens group and the projected chip.
  • the invention has the beneficial effects that, different from the prior art, the invention performs chromatic aberration correction by the first lens group, the second lens group and the third lens group, respectively, and can better correct the chromatic aberration of the projection lens. Moreover, the image telecentric design can be realized by using the aperture and the third lens group, and the contrast and uniformity of the projection lens can be improved. Compared with the prior art, the invention can correct the chromatic aberration of the projection lens, improve the contrast and uniformity of the projection lens, and meet the market demand of the projection lens.
  • FIG. 1 is a schematic structural view of an embodiment of a high resolution wide-angle projection lens of the present invention
  • FIG. 2 is a schematic structural view of an embodiment of a high resolution wide-angle projector of the present invention
  • FIG. 3 is a schematic diagram of an optical path trajectory of an embodiment of the high resolution wide-angle projector of the present invention.
  • an embodiment of the high resolution projector of the present invention includes a first lens group 11, a second lens group 12, an aperture 13 and a third lens group 14 which are sequentially disposed in a first direction.
  • the first lens group 11, the second lens group 12, and the third lens group 14 are spaced apart, and the aperture 13 is located between the second lens group 12 and the third lens group 14.
  • the first lens group 11 may be moved back and forth in the first direction to achieve focusing, or the second lens group 12 may be moved back and forth in the first direction to achieve focusing.
  • the setting of the aperture 13 can realize the design of the image telecentric light path, and can also improve the contrast and uniformity.
  • the first lens group 11, the second lens group 12, and the third lens group 14 are capable of performing chromatic aberration correction, respectively.
  • the lens includes a prism assembly 15 disposed in front of the third lens group with reference to the first direction, and the prism assembly 15 may be a thermal infrared spectral prism (TIR), a polarization beam splitting prism (PBS), or a polygon mirror (X prism).
  • TIR thermal infrared spectral prism
  • PBS polarization beam splitting prism
  • X prism polygon mirror
  • the projection chip 16 is disposed in front of the third lens group 14.
  • the projection chip 16 may be a digital light processing display (DLP), a liquid crystal display (LCOS) or a liquid crystal display (LCD).
  • DLP digital light processing display
  • LCOS liquid crystal display
  • LCD liquid crystal display
  • Different prism combinations 15 or cancel prism combinations 15 can be selected depending on the lighting system and the different projected chips.
  • the prism combination 15 selects a thermal infrared spectrum prism; when the projection chip 16 is a silicon-based liquid crystal display, the prism combination 15 selects a polarization beam splitting prism; When the chip 16 is a liquid crystal display, the prism combination 15 selects a polygon mirror. In addition, depending on the lighting application, the prism combination 15 can also be selected.
  • the first lens group 11 is provided with a first convex-concave negative lens 21, a convex-concave aspherical mirror 22, and a first double concave negative lens 23 in this order.
  • the first convex-concave negative lens 21, the convex-concave aspherical mirror 22, and the first double concave negative lens 23 are all negative lenses.
  • the first double concave negative lens 23 can be replaced by a second convex concave negative lens.
  • the material of the convex-concave aspherical mirror 22 is plexiglass. The purpose of focusing can be achieved by moving the first lens group 11 back and forth.
  • the convex-concave aspherical mirror 22 can correct the TV distortion; in addition, the first lens group 11 can achieve the corrected chromatic aberration by the first convex-concave negative lens 21, the convex-concave aspherical mirror 22, and the first double concave negative lens 23 which are sequentially disposed in the first direction.
  • the focal length of the first lens group 11 is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens 21 has a focal length of F1-1, F1-1 is between -120 mm and -110 mm; the convex-concave aspherical mirror 22 has a focal length of F1-2, F1 -2 between -55 mm and -45 mm; the first double concave negative lens 23 has a focal length of F1-3, F1-3 is between -40 mm and -30 mm, and the first convex-concave negative lens 21 material
  • the refractive index is n1-1, n1-1 is between 1.48 and 1.62; the refractive index of the material of the first double concave negative lens 23 is n1-3, and n1-3 is between 1.6 and 1.7.
  • the second lens group 12 is provided with a third convex-concave negative lens 31, a first double convex positive lens 32, and a second double convex positive lens 33 in this order.
  • the third convex-concave negative lens 31 and the first double convex positive lens 32 may be a glue combination or a double separation combination.
  • the third convex-concave negative lens 31, the first double convex positive lens 32, and the second double convex positive lens 33 are all positive lenses. Wherein, moving the second lens group 12 back and forth can achieve the purpose of internal focusing.
  • the second lens group 12 can realize chromatic aberration correction by sequentially arranging the third convex-concave negative lens 31, the first double convex positive lens 32, and the second double convex positive lens 33 in the first direction.
  • the second lens group 12 has a focal length of F2, F2 is between 30 mm and 40 mm; the third convex-concave negative lens 31 has a focal length of F2-1, and F2-1 is between 75 mm and 85 mm; the first biconvex positive The focal length of the lens 32 is F2-2, F2-2 is between 75 mm and 85 mm; the second double convex positive lens 33 has a focal length of F2-3, F2-3 is between 60 mm and 80 mm, and the third convex and concave
  • the refractive index of the material of the negative lens 31 is n2-1, and n2-1 is between 1.8 and 1.85;
  • the first biconvex positive lens 32 has a refractive index of n2-2, n2-2 is between 1.75 and 1.81; the second biconvex positive lens 33 has a refractive index of n2-3, n2-3 is between 1.6 and Between 1.66, the third convex-concave negative lens 31 and the first double convex positive lens 21 are
  • the third lens group 14 is provided with a third double convex positive lens 41, a fourth concave negative negative lens 42, a second double concave negative lens 43, a fourth double convex positive lens 44, and a fifth concave positive lens 45, in order, in the first direction.
  • the fifth concave-convex positive lens 45 may be replaced by a fifth double convex positive lens 41; the third double convex positive lens 41, the fourth concave-convex negative lens 42, the second double concave negative lens 43 and the fourth
  • the double convex positive lenses 44 are both negative lenses and are a glue combination; the fifth concave positive lens 45, the sixth double convex positive lens 46, and the seventh double convex positive lens 47 are all positive lenses.
  • the third lens group 14 can correct the chromatic aberration, and the third lens group 14 and the aperture 13 are formed in a telecentric design to improve contrast and uniformity.
  • the third lens group 14 has a focal length of F3, F3 is between 40 mm and 50 mm; the third biconvex positive lens 41 has a focal length of F3-1, and F3-1 is between -300 mm and -200 mm; The concave-convex negative lens 42 has a focal length of F3-2, F3-2 is between -300 mm and -200 mm; the second double concave negative lens 43 has a focal length of F3-3, and F3-3 is between -100 mm and -80 mm.
  • the fourth double convex positive lens 44 focal length is F3-4, F3-4 is between -100 mm and -80 mm;
  • the fifth concave positive lens 45 focal length is F3-5, F3-5 is between 140 mm Between 160 mm;
  • the sixth double convex positive lens 46 has a focal length of F3-6, F3-6 is between 85 mm and 110 mm;
  • the seventh double convex positive lens 47 has a focal length of F3-7, and F3-7 is between Between 35 mm and 45 mm
  • the material of the third double convex positive lens 41 has a refractive index of n3-1, n3-1 is between 1.48 and -1.52, and the refractive index of the material of the fourth uneven negative lens 42 is n3-2.
  • N3-2 is between 1.8 and 1.85;
  • the second double concave negative lens 43 has a refractive index of n3-3, n3-3 is between 1.8 and 1.85; and the refractive index of the fourth biconvex positive lens 44 material N3-4, n3-4 is between 1.48 and 1.52;
  • the refractive index of the fifth concave positive lens 45 material is n3-5, n3- 5 is between 1.48 and 1.52;
  • the sixth biconvex positive lens 46 has a refractive index of n3-6, n3-6 is between 1.48 and 1.52;
  • the seventh biconvex positive lens 47 has a refractive index of n3- 7, n3-7 is between 1.8 and 1.85.
  • the field of view of the lens can be increased, the projection ratio can be reduced, and the projection in a small space can be better satisfied. Large image requirements.
  • the parameters of an optical system embodiment of a high resolution wide-angle projection lens of the present invention are given below by taking a 0.65 inch DMD chip as an example.
  • the parameters of the projection lens are as follows: SURF RADIUS THICKNESS MATERICAL 2 69.59000 7.000000 K9_CHINA 3 30.86000 8.720000 4 71.38147 5.000000 PMMA 5 18.00000 20.700000 6 INFINITY 2.742000 7 -89.38000 3.000000 SLAL14_OHARA 8 36.08800 24.870000 9 128.13000 3.000000 STIH53_OHARA 10 44.93000 10.300000 NBFD15_HOYA 11 -105.10000 0.150000 12 44.83000 7.000 ZF1_CHINA 13 -735.74000 24.440000 STO INFINITY 6.850000 15 225.72000 3.750000 NPK52_SCHOTT 16 -16.69200 1.200000 STIH53_OHARA 17 -69.30900 0.710000 18 -205.78000 1.200000
  • FIG. 3 a schematic diagram of an optical path of an embodiment of the high resolution wide-angle projector of the present invention is shown. From the figure we can see that the light 51, the light 52 and the light 53 are arranged from top to bottom before entering the projector, and the light 51, the light 52 and the light 53 are arranged from bottom to top after leaving the projector, and the outgoing image is relatively The incident image is inverted. In the process of sequentially passing the light 51, the light ray 52, and the light ray 53 through the first lens group, the second lens group, and the third lens group, the chromatic aberration of the light is continuously corrected in the first direction.
  • the contrast and uniformity of the light rays 51, the light rays 52, and the light rays 53 are improved by the image telecentric design formed by the aperture and the third lens group. According to the setting of each lens parameter in the first lens group, the second lens group and the third lens group, the field of view of the projector can be increased to reduce the projection ratio.
  • the angle of view is 105 degrees
  • the projection ratio is 0.6
  • the focal length F is 8.7 mm.
  • the projection distance is one meter
  • the projected image is 80 inches.
  • the present invention performs chromatic aberration correction by the first lens group, the second lens group, and the third lens group, respectively, so that the chromatic aberration of the projection lens can be better corrected.
  • the image telecentric design can be realized by using the aperture and the third lens group, and the contrast and uniformity of the projection lens can be improved.
  • the invention can correct the chromatic aberration of the projection lens, improve the contrast and uniformity of the projection lens, and meet the market demand of the projection lens.

Abstract

A high-resolution wide-angle projection lens and a projector. The throw ratio of the projection lens is less than 0.6. The projection lens comprises: a first lens group (11), a second lens group (12), a diaphragm (13), and a third lens group (14) that are sequentially disposed along a first direction. The projector comprises a projected chip (16) and the high-resolution wide-angle projection lens. With reference to the first direction, the projected chip is disposed in front of the third lens group, thereby calibrating chromatic aberration of the projection lens and the projector, and improving the contrast ratio and evenness.

Description

一种高分辩率广角投影镜头及投影仪High resolution wide-angle projection lens and projector
【技术领域】[Technical Field]
本发明涉及光学技术领域，特别是涉及高分辩率广角投影镜头及投影仪。 The invention relates to the field of optical technology, in particular to a high resolution wide-angle projection lens and a projector.
【背景技术】 【Background technique】
目前普遍使用的投影镜头的焦距较大，视场角较小，视场角一般小于60度，因此投射比例（Throw Ratio）较大，投射比例一般大于2。在投影镜头的实际应用中，在投射距离为1米时，投射图象小于50英寸，不能很好地满足在较小空间投射较大图象的要求。At present, the projection lens commonly used has a large focal length, a small field of view, and the angle of view is generally less than 60 degrees, so the projection ratio (Throw) Ratio) is larger and the projection ratio is generally greater than 2. In the practical application of the projection lens, when the projection distance is 1 meter, the projected image is less than 50 inches, which does not satisfactorily meet the requirement of projecting a larger image in a small space.
现在虽然有个别型号的投影镜头投射比例小于1，但由于对比度和清晰度较差，色差较大或者存在视觉（TV）畸变，也不能很好地满足市场的需求。Although there are projection models with individual models that have a projection ratio of less than 1, they are not well suited to the market because of poor contrast and sharpness, large chromatic aberrations, or visual (TV) distortion.
【发明内容】 [Summary of the Invention]
本发明主要解决的技术问题是提供一种高分辩率广角投影镜头及投影仪，能够实现校正色差、提高对比度和均匀性。The technical problem to be solved by the present invention is to provide a high resolution wide-angle projection lens and a projector capable of correcting chromatic aberration, improving contrast and uniformity.
为解决上述技术问题，本发明采用的一个技术方案是：提供一种高分辩率广角投影镜头，其焦距投射比例小于0.6，并且包括：In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a high resolution wide-angle projection lens whose focal length projection ratio is less than 0.6, and includes:
沿第一方向依次设置的第一透镜组、第二透镜组、光阑、第三透镜组以及棱镜组合，第一透镜组包括沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第二凸凹负透镜，或沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第一双凹负透镜。a first lens group, a second lens group, a diaphragm, a third lens group, and a prism combination disposed in the first direction, the first lens group includes a first convex-concave negative lens, a convex-concave aspherical mirror, and a convex-concave aspherical mirror sequentially disposed in the first direction a second convex-concave negative lens, or a first convex-concave negative lens, a convex-concave aspherical mirror, and a first double concave negative lens sequentially disposed in the first direction.
根据本发明一优选实施方式，第一透镜组焦距为F1，F1 介于-13毫米与-12毫米之间；第一凸凹负透镜焦距为F1-1，F1-1介于-120毫米与-110毫米之间；凸凹非球面镜焦距为F1-2，F1-2介于-55毫米与-45毫米之间；第二凸凹负透镜或第一双凹负透镜焦距为F1-3，F1-3介于-40毫米与-30毫米之间，凸凹非球面镜的材料为有机玻璃，第一凸凹负透镜材料的折射率为n1-1，n1-1介于1.48与1.62之间；第二凸凹负透镜或第一双凹负透镜材料的折射率为n1-3，n1-3介于1.6与1.7之间。According to a preferred embodiment of the present invention, the focal length of the first lens group is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens focal length is F1-1, F1-1 is between -120 mm and -110 mm; convex-concave aspherical mirror focal length is F1-2, F1-2 Between -55 mm and -45 mm; second convex-concave negative lens or first double concave negative lens focal length F1-3, F1-3 between -40 mm and -30 mm, material of convex-concave aspherical mirror For the plexiglass, the refractive index of the first convex-concave negative lens material is n1-1, n1-1 is between 1.48 and 1.62; the refractive index of the second convex-concave negative lens or the first double concave negative lens material is n1-3, N1-3 is between 1.6 and 1.7.
根据本发明一优选实施方式，第二透镜组包括沿第一方向依次设置的第三凸凹负透镜、第一双凸正透镜以及第二双凸正透镜。According to a preferred embodiment of the present invention, the second lens group includes a third convex-concave negative lens, a first double convex positive lens, and a second double convex positive lens which are sequentially disposed in the first direction.
根据本发明一优选实施方式，第二透镜组焦距为F2，F2介于30毫米与40毫米之间；第三凸凹负透镜焦距为F2-1，F2-1介于75毫米与85毫米之间；第一双凸正透镜焦距为F2-2，F2-2介于75毫米与85毫米之间；第二双凸正透镜焦距为F2-3，F2-3介于60毫米与80毫米之间，第三凸凹负透镜材料的折射率为n2-1，n2-1介于1.8与1.85之间; 第一双凸正透镜材料的折射率为n2-2，n2-2介于1.75与1.81之间；第二双凸正透镜材料的折射率为n2-3，n2-3介于1.6与1.66之间，第三凸凹负透镜与第一双凸正透镜为胶合或双分离组合。According to a preferred embodiment of the present invention, the focal length of the second lens group is F2, F2 is between 30 mm and 40 mm; the focal length of the third convex-concave negative lens is F2-1, and the F2-1 is between 75 mm and 85 mm. The first double convex positive lens has a focal length of F2-2, F2-2 is between 75 mm and 85 mm; the second double convex positive lens has a focal length of F2-3, and F2-3 is between 60 mm and 80 mm. The refractive index of the third convex-concave negative lens material is n2-1, and n2-1 is between 1.8 and 1.85; The first biconvex positive lens material has a refractive index of n2-2, n2-2 is between 1.75 and 1.81; the second biconvex positive lens material has a refractive index of n2-3, and n2-3 is between 1.6 and 1.66. Meanwhile, the third convex-concave negative lens and the first double convex positive lens are combined in a glue or a double separation.
根据本发明一优选实施方式，第三透镜组包括沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五双凸正透镜、第六双凸正透镜以及第七双凸正透镜，或沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五凹凸正透镜、第六双凸正透镜以及第七双凸正透镜。According to a preferred embodiment of the present invention, the third lens group includes a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, a fourth double convex positive lens, and a fifth double which are sequentially disposed in the first direction. a convex positive lens, a sixth double convex positive lens, and a seventh double convex positive lens, or a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and a fourth double convex which are sequentially disposed in the first direction A positive lens, a fifth concave positive lens, a sixth double convex positive lens, and a seventh double convex positive lens.
根据本发明一优选实施方式，第三透镜组焦距为F3，F3介于40毫米与50毫米之间；第三双凸正透镜焦距为F3-1，F3-1介于-300毫米与-200毫米之间；第四凹凸负透镜焦距为F3-2，F3-2介于-300毫米与-200毫米之间；第二双凹负透镜焦距为F3-3，F3-3介于-100毫米与-80毫米之间；第四双凸正透镜焦距为F3-4，F3-4介于-100毫米与-80毫米之间；第五双凸正透镜或第五凹凸正透镜焦距为F3-5，F3-5介于140毫米与160毫米之间；第六双凸正透镜焦距为F3-6，F3-6介于85毫米与110毫米之间；第七双凸正透镜焦距为F3-7，F3-7介于35毫米与45毫米之间，第三双凸正透镜材料的折射率为n3-1，n3-1介于1.48与-1.52之间；第四凹凸负透镜材料的折射率为n3-2，n3-2介于1.8与1.85之间；第二双凹负透镜材料的折射率为n3-3，n3-3介于1.8与1.85之间；第四双凸正透镜材料的折射率为n3-4，n3-4介于1.48与1.52之间；第五双凸正透镜或第五凹凸正透镜材料的折射率为n3-5，n3-5介于1.48与1.52之间；第六双凸正透镜材料的折射率为n3-6，n3-6介于1.48与1.52之间；第七双凸正透镜材料的折射率为n3-7，n3-7介于1.8与1.85之间，第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜和第四双凸正透镜为胶合组合。According to a preferred embodiment of the present invention, the focal length of the third lens group is F3, F3 is between 40 mm and 50 mm; the focal length of the third biconvex positive lens is F3-1, and the F3-1 is between -300 mm and -200. Between millimeters; fourth concave and convex negative lens focal length is F3-2, F3-2 is between -300 mm and -200 mm; second double concave negative lens focal length is F3-3, F3-3 is between -100 mm Between -80 mm; the fourth double convex positive lens focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth double convex positive lens or the fifth concave positive lens positive focal length is F3- 5, F3-5 is between 140 mm and 160 mm; the sixth double convex positive lens focal length is F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens focal length is F3- 7, F3-7 is between 35 mm and 45 mm, the third biconvex positive lens material has a refractive index n3-1, n3-1 is between 1.48 and -1.52; the refraction of the fourth concave and negative negative lens material The ratio is n3-2, n3-2 is between 1.8 and 1.85; the second double concave negative lens material has a refractive index of n3-3, n3-3 is between 1.8 and 1.85; the fourth biconvex positive lens material The refractive index is n3-4, n3-4 is between 1.48 and 1.52; the fifth biconvex is positive The refractive index of the lens or the fifth concave-convex positive lens material is n3-5, n3-5 is between 1.48 and 1.52; the refractive index of the sixth double convex positive lens material is n3-6, and n3-6 is between 1.48 and 1.52. The seventh double convex positive lens material has a refractive index of n3-7, n3-7 is between 1.8 and 1.85, a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and The four double convex positive lenses are glued combinations.
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种高分辩率广角投影镜头，其焦距投射比例小于0.6，并且包括：沿第一方向依次设置的第一透镜组、第二透镜组、光阑以及第三透镜组。In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a high-resolution wide-angle projection lens having a focal length projection ratio of less than 0.6, and including: a first lens group and a second lens sequentially disposed in the first direction a lens group, an aperture, and a third lens group.
根据本发明一优选实施方式，镜头包括以第一方向为参考而设置于第三透镜组前面的棱镜组合。According to a preferred embodiment of the invention, the lens comprises a prism combination disposed in front of the third lens group with reference to the first direction.
根据本发明一优选实施方式，第一透镜组包括沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第二凸凹负透镜，或沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第一双凹负透镜。According to a preferred embodiment of the present invention, the first lens group includes a first convex-concave negative lens, a convex-concave aspherical mirror, and a second convex-concave negative lens which are sequentially disposed in the first direction, or a first convex-concave negative lens sequentially disposed in the first direction, A convex-concave aspherical mirror and a first double concave negative lens.
根据本发明一优选实施方式，第一透镜组焦距为F1，F1 介于-13毫米与-12毫米之间；第一凸凹负透镜焦距为F1-1，F1-1介于-120毫米与-110毫米之间；凸凹非球面镜焦距为F1-2，F1-2介于-55毫米与-45毫米之间；第二凸凹负透镜或第一双凹负透镜焦距为F1-3，F1-3介于-40毫米与-30毫米之间，凸凹非球面镜的材料为有机玻璃，第一凸凹负透镜材料的折射率为n1-1，n1-1介于1.48与1.62之间；第二凸凹负透镜或第一双凹负透镜材料的折射率为n1-3，n1-3介于1.6与1.7之间。According to a preferred embodiment of the present invention, the focal length of the first lens group is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens focal length is F1-1, F1-1 is between -120 mm and -110 mm; convex-concave aspherical mirror focal length is F1-2, F1-2 Between -55 mm and -45 mm; second convex-concave negative lens or first double concave negative lens focal length F1-3, F1-3 between -40 mm and -30 mm, material of convex-concave aspherical mirror For the plexiglass, the refractive index of the first convex-concave negative lens material is n1-1, n1-1 is between 1.48 and 1.62; the refractive index of the second convex-concave negative lens or the first double concave negative lens material is n1-3, N1-3 is between 1.6 and 1.7.
根据本发明一优选实施方式，第二透镜组包括沿第一方向依次设置的第三凸凹负透镜、第一双凸正透镜以及第二双凸正透镜。According to a preferred embodiment of the present invention, the second lens group includes a third convex-concave negative lens, a first double convex positive lens, and a second double convex positive lens which are sequentially disposed in the first direction.
根据本发明一优选实施方式，第二透镜组焦距为F2，F2介于30毫米与40毫米之间；第三凸凹负透镜焦距为F2-1，F2-1介于75毫米与85毫米之间；第一双凸正透镜焦距为F2-2，F2-2介于75毫米与85毫米之间；第二双凸正透镜焦距为F2-3，F2-3介于60毫米与80毫米之间，第三凸凹负透镜材料的折射率为n2-1，n2-1介于1.8与1.85之间; 第一双凸正透镜材料的折射率为n2-2，n2-2介于1.75与1.81之间；第二双凸正透镜材料的折射率为n2-3，n2-3介于1.6与1.66之间，第三凸凹负透镜与第一双凸正透镜为胶合或双分离组合。According to a preferred embodiment of the present invention, the focal length of the second lens group is F2, F2 is between 30 mm and 40 mm; the focal length of the third convex-concave negative lens is F2-1, and the F2-1 is between 75 mm and 85 mm. The first double convex positive lens has a focal length of F2-2, F2-2 is between 75 mm and 85 mm; the second double convex positive lens has a focal length of F2-3, and F2-3 is between 60 mm and 80 mm. The refractive index of the third convex-concave negative lens material is n2-1, and n2-1 is between 1.8 and 1.85; The first biconvex positive lens material has a refractive index of n2-2, n2-2 is between 1.75 and 1.81; the second biconvex positive lens material has a refractive index of n2-3, and n2-3 is between 1.6 and 1.66. Meanwhile, the third convex-concave negative lens and the first double convex positive lens are combined in a glue or a double separation.
根据本发明一优选实施方式，第三透镜组包括沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五双凸正透镜、第六双凸正透镜以及第七双凸正透镜，或沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五凹凸正透镜、第六双凸正透镜以及第七双凸正透镜。According to a preferred embodiment of the present invention, the third lens group includes a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, a fourth double convex positive lens, and a fifth double which are sequentially disposed in the first direction. a convex positive lens, a sixth double convex positive lens, and a seventh double convex positive lens, or a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and a fourth double convex which are sequentially disposed in the first direction A positive lens, a fifth concave positive lens, a sixth double convex positive lens, and a seventh double convex positive lens.
根据本发明一优选实施方式，第三透镜组焦距为F3，F3介于40毫米与50毫米之间；第三双凸正透镜焦距为F3-1，F3-1介于-300毫米与-200毫米之间；第四凹凸负透镜焦距为F3-2，F3-2介于-300毫米与-200毫米之间；第二双凹负透镜焦距为F3-3，F3-3介于-100毫米与-80毫米之间；第四双凸正透镜焦距为F3-4，F3-4介于-100毫米与-80毫米之间；第五双凸正透镜或第五凹凸正透镜焦距为F3-5，F3-5介于140毫米与160毫米之间；第六双凸正透镜焦距为F3-6，F3-6介于85毫米与110毫米之间；第七双凸正透镜焦距为F3-7，F3-7介于35毫米与45毫米之间，第三双凸正透镜材料的折射率为n3-1，n3-1介于1.48与-1.52之间；第四凹凸负透镜材料的折射率为n3-2，n3-2介于1.8与1.85之间；第二双凹负透镜材料的折射率为n3-3，n3-3介于1.8与1.85之间；第四双凸正透镜材料的折射率为n3-4，n3-4介于1.48与1.52之间；第五双凸正透镜或第五凹凸正透镜材料的折射率为n3-5，n3-5介于1.48与1.52之间；第六双凸正透镜材料的折射率为n3-6，n3-6介于1.48与1.52之间；第七双凸正透镜材料的折射率为n3-7，n3-7介于1.8与1.85之间，第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜和第四双凸正透镜为胶合组合。According to a preferred embodiment of the present invention, the focal length of the third lens group is F3, F3 is between 40 mm and 50 mm; the focal length of the third biconvex positive lens is F3-1, and the F3-1 is between -300 mm and -200. Between millimeters; fourth concave and convex negative lens focal length is F3-2, F3-2 is between -300 mm and -200 mm; second double concave negative lens focal length is F3-3, F3-3 is between -100 mm Between -80 mm; the fourth double convex positive lens focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth double convex positive lens or the fifth concave positive lens positive focal length is F3- 5, F3-5 is between 140 mm and 160 mm; the sixth double convex positive lens focal length is F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens focal length is F3- 7, F3-7 is between 35 mm and 45 mm, the third biconvex positive lens material has a refractive index n3-1, n3-1 is between 1.48 and -1.52; the refraction of the fourth concave and negative negative lens material The ratio is n3-2, n3-2 is between 1.8 and 1.85; the second double concave negative lens material has a refractive index of n3-3, n3-3 is between 1.8 and 1.85; the fourth biconvex positive lens material The refractive index is n3-4, n3-4 is between 1.48 and 1.52; the fifth biconvex is positive The refractive index of the lens or the fifth concave-convex positive lens material is n3-5, n3-5 is between 1.48 and 1.52; the refractive index of the sixth double convex positive lens material is n3-6, and n3-6 is between 1.48 and 1.52. The seventh double convex positive lens material has a refractive index of n3-7, n3-7 is between 1.8 and 1.85, a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, and The four double convex positive lenses are glued combinations.
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种高分辩率广角投影仪，包括被投影芯片和的高分辩率广角投影镜头，以第一方向为参考，被投影芯片设置于第三透镜组前面。In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a high resolution wide-angle projector, including a projection chip and a high resolution wide-angle projection lens, which are referenced by the first direction and are set by the projection chip. In front of the third lens group.
根据本发明一优选实施方式，投影仪包括位于第三透镜组和被投影芯片之间的棱镜组合。 According to a preferred embodiment of the invention, the projector comprises a combination of prisms between the third lens group and the projected chip.
本发明的有益效果是：区别于现有技术的情况，本发明通过第一透镜组、第二透镜组和第三透镜组分别进行色差校正，可以实现更好地校正投影镜头的色差。并且，利用光阑和第三透镜组可以实现象方远心设计，可以提高投影镜头的对比度和均匀性。本发明与现有技术相比，能够校正投影镜头的色差，提高投影镜头的对比度和均匀性，满足了投影镜头的市场需求。The invention has the beneficial effects that, different from the prior art, the invention performs chromatic aberration correction by the first lens group, the second lens group and the third lens group, respectively, and can better correct the chromatic aberration of the projection lens. Moreover, the image telecentric design can be realized by using the aperture and the third lens group, and the contrast and uniformity of the projection lens can be improved. Compared with the prior art, the invention can correct the chromatic aberration of the projection lens, improve the contrast and uniformity of the projection lens, and meet the market demand of the projection lens.
【附图说明】 [Description of the Drawings]
图1是本发明高分辩率广角投影镜头一实施例的结构示意图；1 is a schematic structural view of an embodiment of a high resolution wide-angle projection lens of the present invention;
图2本发明高分辩率广角投影仪一实施例的结构示意图；2 is a schematic structural view of an embodiment of a high resolution wide-angle projector of the present invention;
图3是本发明高分辩率广角投影仪一实施例的光路轨迹示意图。3 is a schematic diagram of an optical path trajectory of an embodiment of the high resolution wide-angle projector of the present invention.
【具体实施方式】 【detailed description】
下面结合附图和实施例对本发明进行详细说明。The invention will now be described in detail in conjunction with the drawings and embodiments.
参阅图1，本发明高分辨率投影仪一实施例包括：沿第一方向依次设置的第一透镜组11、第二透镜组12、光阑13以及第三透镜组14。第一透镜组11、第二透镜组12、以及第三透镜组14间隔设置，光阑13位于第二透镜组12与第三透镜组14之间。Referring to FIG. 1, an embodiment of the high resolution projector of the present invention includes a first lens group 11, a second lens group 12, an aperture 13 and a third lens group 14 which are sequentially disposed in a first direction. The first lens group 11, the second lens group 12, and the third lens group 14 are spaced apart, and the aperture 13 is located between the second lens group 12 and the third lens group 14.
在实际过程中，可以在沿第一方向，前后移动第一透镜组11实现调焦，也可以在沿第一方向，前后移动第二透镜组12实现调焦。In the actual process, the first lens group 11 may be moved back and forth in the first direction to achieve focusing, or the second lens group 12 may be moved back and forth in the first direction to achieve focusing.
其中，设置光阑13可以实现象方远心光路设计，也可以提高对比度和均匀性。此外，第一透镜组11、第二透镜组12和第三透镜组14能够分别进行色差校正。Among them, the setting of the aperture 13 can realize the design of the image telecentric light path, and can also improve the contrast and uniformity. Further, the first lens group 11, the second lens group 12, and the third lens group 14 are capable of performing chromatic aberration correction, respectively.
镜头包括以第一方向为参考而设置于第三透镜组前面的棱镜组合15，棱镜组合15可以为热红外光谱棱镜（TIR）、偏振分光棱镜（PBS）或多棱镜（X棱镜）。The lens includes a prism assembly 15 disposed in front of the third lens group with reference to the first direction, and the prism assembly 15 may be a thermal infrared spectral prism (TIR), a polarization beam splitting prism (PBS), or a polygon mirror (X prism).
以第一方向为参考，被投影芯片16设置于第三透镜组14前面，被投影芯片16可以为数字光处理显示器（DLP）、硅基液晶显示器（LCOS）或液晶显示器（LCD）。根据不同的照明系统和不同的被投影芯片可以选择不同的棱镜组合15或者取消棱镜组合15。Referring to the first direction, the projection chip 16 is disposed in front of the third lens group 14. The projection chip 16 may be a digital light processing display (DLP), a liquid crystal display (LCOS) or a liquid crystal display (LCD). Different prism combinations 15 or cancel prism combinations 15 can be selected depending on the lighting system and the different projected chips.
根据照明系统的不同，在被投影芯片16为数字光处理显示器时，棱镜组合15选择热红外光谱棱镜；在被投影芯片16为硅基液晶显示器时，棱镜组合15选择偏振分光棱镜；在被投影芯片16为液晶显示器时，棱镜组合15选择多棱镜。另外根据不同的照明应用，也可以选择取消棱镜组合15。Depending on the illumination system, when the projection chip 16 is a digital light processing display, the prism combination 15 selects a thermal infrared spectrum prism; when the projection chip 16 is a silicon-based liquid crystal display, the prism combination 15 selects a polarization beam splitting prism; When the chip 16 is a liquid crystal display, the prism combination 15 selects a polygon mirror. In addition, depending on the lighting application, the prism combination 15 can also be selected.
参阅图2， 第一透镜组11沿第一方向依次设置第一凸凹负透镜21、凸凹非球面镜22、第一双凹负透镜23。第一凸凹负透镜21、凸凹非球面镜22、第一双凹负透镜23均为负性透镜。第一双凹负透镜23可以被第二凸凹负透镜所代替。凸凹非球面镜22的材料为有机玻璃。通过前后移动第一透镜组11可以实现调焦的目的。See Figure 2, The first lens group 11 is provided with a first convex-concave negative lens 21, a convex-concave aspherical mirror 22, and a first double concave negative lens 23 in this order. The first convex-concave negative lens 21, the convex-concave aspherical mirror 22, and the first double concave negative lens 23 are all negative lenses. The first double concave negative lens 23 can be replaced by a second convex concave negative lens. The material of the convex-concave aspherical mirror 22 is plexiglass. The purpose of focusing can be achieved by moving the first lens group 11 back and forth.
凸凹非球面镜22可以校正TV畸变；此外，第一透镜组11通过沿第一方向依次设置的第一凸凹负透镜21、凸凹非球面镜22、第一双凹负透镜23可以实现校正色差。The convex-concave aspherical mirror 22 can correct the TV distortion; in addition, the first lens group 11 can achieve the corrected chromatic aberration by the first convex-concave negative lens 21, the convex-concave aspherical mirror 22, and the first double concave negative lens 23 which are sequentially disposed in the first direction.
第一透镜组11焦距为F1，F1 介于-13毫米与-12毫米之间；第一凸凹负透镜21焦距为F1-1，F1-1介于-120毫米与-110毫米之间；凸凹非球面镜22焦距为F1-2，F1-2介于-55毫米与-45毫米之间；第一双凹负透镜23焦距为F1-3，F1-3介于-40毫米与-30毫米之间，第一凸凹负透镜21材料的折射率为n1-1，n1-1介于1.48与1.62之间；第一双凹负透镜23材料的折射率为n1-3，n1-3介于1.6与1.7之间。The focal length of the first lens group 11 is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens 21 has a focal length of F1-1, F1-1 is between -120 mm and -110 mm; the convex-concave aspherical mirror 22 has a focal length of F1-2, F1 -2 between -55 mm and -45 mm; the first double concave negative lens 23 has a focal length of F1-3, F1-3 is between -40 mm and -30 mm, and the first convex-concave negative lens 21 material The refractive index is n1-1, n1-1 is between 1.48 and 1.62; the refractive index of the material of the first double concave negative lens 23 is n1-3, and n1-3 is between 1.6 and 1.7.
第二透镜组12沿第一方向依次设置第三凸凹负透镜31、第一双凸正透镜32以及第二双凸正透镜33。第三凸凹负透镜31与第一双凸正透镜32可以为胶合组合也可以为双分离组合。第三凸凹负透镜31、第一双凸正透镜32以及第二双凸正透镜33均为正性透镜。其中，前后移动第二透镜组12可以实现内调焦的目的。The second lens group 12 is provided with a third convex-concave negative lens 31, a first double convex positive lens 32, and a second double convex positive lens 33 in this order. The third convex-concave negative lens 31 and the first double convex positive lens 32 may be a glue combination or a double separation combination. The third convex-concave negative lens 31, the first double convex positive lens 32, and the second double convex positive lens 33 are all positive lenses. Wherein, moving the second lens group 12 back and forth can achieve the purpose of internal focusing.
第二透镜组12通过沿第一方向依次设置第三凸凹负透镜31、第一双凸正透镜32以及第二双凸正透镜33可以实现色差校正。The second lens group 12 can realize chromatic aberration correction by sequentially arranging the third convex-concave negative lens 31, the first double convex positive lens 32, and the second double convex positive lens 33 in the first direction.
第二透镜组12焦距为F2，F2介于30毫米与40毫米之间；第三凸凹负透镜31焦距为F2-1，F2-1介于75毫米与85毫米之间；第一双凸正透镜32焦距为F2-2，F2-2介于75毫米与85毫米之间；第二双凸正透镜33焦距为F2-3，F2-3介于60毫米与80毫米之间，第三凸凹负透镜31材料的折射率为n2-1，n2-1介于1.8与1.85之间; 第一双凸正透镜32材料的折射率为n2-2，n2-2介于1.75与1.81之间；第二双凸正透镜33材料的折射率为n2-3，n2-3介于1.6与1.66之间，第三凸凹负透镜31与第一双凸正透镜21为胶合或双分离组合。The second lens group 12 has a focal length of F2, F2 is between 30 mm and 40 mm; the third convex-concave negative lens 31 has a focal length of F2-1, and F2-1 is between 75 mm and 85 mm; the first biconvex positive The focal length of the lens 32 is F2-2, F2-2 is between 75 mm and 85 mm; the second double convex positive lens 33 has a focal length of F2-3, F2-3 is between 60 mm and 80 mm, and the third convex and concave The refractive index of the material of the negative lens 31 is n2-1, and n2-1 is between 1.8 and 1.85; The first biconvex positive lens 32 has a refractive index of n2-2, n2-2 is between 1.75 and 1.81; the second biconvex positive lens 33 has a refractive index of n2-3, n2-3 is between 1.6 and Between 1.66, the third convex-concave negative lens 31 and the first double convex positive lens 21 are glued or double-separated.
第三透镜组14沿第一方向依次设置第三双凸正透镜41、第四凹凸负透镜42、第二双凹负透镜43、第四双凸正透镜44、第五凹凸正透镜45、第六双凸正透镜46以及第七双凸正透镜47。所述第五凹凸正透镜45可以被第五双凸正透镜所代替；所述第三双凸正透镜41、所述第四凹凸负透镜42、所述第二双凹负透镜43和第四双凸正透镜44均为负性透镜且为胶合组合；第五凹凸正透镜45，第六双凸正透镜46，第七双凸正透镜47均为正性透镜。The third lens group 14 is provided with a third double convex positive lens 41, a fourth concave negative negative lens 42, a second double concave negative lens 43, a fourth double convex positive lens 44, and a fifth concave positive lens 45, in order, in the first direction. A six-double convex positive lens 46 and a seventh double convex positive lens 47. The fifth concave-convex positive lens 45 may be replaced by a fifth double convex positive lens 41; the third double convex positive lens 41, the fourth concave-convex negative lens 42, the second double concave negative lens 43 and the fourth The double convex positive lenses 44 are both negative lenses and are a glue combination; the fifth concave positive lens 45, the sixth double convex positive lens 46, and the seventh double convex positive lens 47 are all positive lenses.
第三透镜组14可以校正色差，第三透镜组14与光阑13组成象方远心设计，可以提高对比度和均匀性。The third lens group 14 can correct the chromatic aberration, and the third lens group 14 and the aperture 13 are formed in a telecentric design to improve contrast and uniformity.
第三透镜组14焦距为F3，F3介于40毫米与50毫米之间；第三双凸正透镜41焦距为F3-1，F3-1介于-300毫米与-200毫米之间；第四凹凸负透镜42焦距为F3-2，F3-2介于-300毫米与-200毫米之间；第二双凹负透镜43焦距为F3-3，F3-3介于-100毫米与-80毫米之间；第四双凸正透镜44焦距为F3-4，F3-4介于-100毫米与-80毫米之间；第五凹凸正透镜45焦距为F3-5，F3-5介于140毫米与160毫米之间；第六双凸正透镜46焦距为F3-6，F3-6介于85毫米与110毫米之间；第七双凸正透镜47焦距为F3-7，F3-7介于35毫米与45毫米之间，第三双凸正透镜41材料的折射率为n3-1，n3-1介于1.48与-1.52之间；第四凹凸负透镜42材料的折射率为n3-2，n3-2介于1.8与1.85之间；第二双凹负透镜43材料的折射率为n3-3，n3-3介于1.8与1.85之间；第四双凸正透镜44材料的折射率为n3-4，n3-4介于1.48与1.52之间；第五凹凸正透镜45材料的折射率为n3-5，n3-5介于1.48与1.52之间；第六双凸正透镜46材料的折射率为n3-6，n3-6介于1.48与1.52之间；第七双凸正透镜47材料的折射率为n3-7，n3-7介于1.8与1.85之间。The third lens group 14 has a focal length of F3, F3 is between 40 mm and 50 mm; the third biconvex positive lens 41 has a focal length of F3-1, and F3-1 is between -300 mm and -200 mm; The concave-convex negative lens 42 has a focal length of F3-2, F3-2 is between -300 mm and -200 mm; the second double concave negative lens 43 has a focal length of F3-3, and F3-3 is between -100 mm and -80 mm. Between: the fourth double convex positive lens 44 focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth concave positive lens 45 focal length is F3-5, F3-5 is between 140 mm Between 160 mm; the sixth double convex positive lens 46 has a focal length of F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens 47 has a focal length of F3-7, and F3-7 is between Between 35 mm and 45 mm, the material of the third double convex positive lens 41 has a refractive index of n3-1, n3-1 is between 1.48 and -1.52, and the refractive index of the material of the fourth uneven negative lens 42 is n3-2. N3-2 is between 1.8 and 1.85; the second double concave negative lens 43 has a refractive index of n3-3, n3-3 is between 1.8 and 1.85; and the refractive index of the fourth biconvex positive lens 44 material N3-4, n3-4 is between 1.48 and 1.52; the refractive index of the fifth concave positive lens 45 material is n3-5, n3- 5 is between 1.48 and 1.52; the sixth biconvex positive lens 46 has a refractive index of n3-6, n3-6 is between 1.48 and 1.52; and the seventh biconvex positive lens 47 has a refractive index of n3- 7, n3-7 is between 1.8 and 1.85.
根据对第一透镜组、第一透镜组以及第三透镜组内部各个透镜参数的设定，可以实现增大镜头的视场角，降低投射比例的目的，较好的满足在较小空间投射较大图像的要求。According to the setting of each lens parameter in the first lens group, the first lens group and the third lens group, the field of view of the lens can be increased, the projection ratio can be reduced, and the projection in a small space can be better satisfied. Large image requirements.
下面以0.65英寸DMD芯片为例，给出本发明一高分辨率广角投影镜头的光学系统实施例的参数。投影镜头的参数如下：
SURF RADIUS THICKNESS MATERICAL
2 69.59000 7.000000 K9_CHINA
3 30.86000 8.720000
4 71.38147 5.000000 PMMA
5 18.00000 20.700000
6 INFINITY 2.742000
7 -89.38000 3.000000 SLAL14_OHARA
8 36.08800 24.870000
9 128.13000 3.000000 STIH53_OHARA
10 44.93000 10.300000 NBFD15_HOYA
11 -105.10000 0.150000
12 44.83000 7.000000 ZF1_CHINA
13 -735.74000 24.440000
STO INFINITY 6.850000
15 225.72000 3.750000 NPK52_SCHOTT
16 -16.69200 1.200000 STIH53_OHARA
17 -69.30900 0.710000
18 -205.78000 1.200000 STIH53_OHARA
19 28.18000 4.050000 NPK52_SCHOTT
20 -56.65000 3.640000
21 -219.78000 2.600000 NPK52_SCHOTT
SURF RADIUS THICKNESS MATERICAL
22 -47.07400 0.150000
23 163.82000 3.350000 NPK52_SCHOTT
24 -105.63000 0.150000
25 53.97000 4.300000 STIH53_OHARA
26 -79.19000 2.500000
27 INFINITY 24.000000 K9_CHINA
28 INFINITY 1.000000
29 INFINITY 3.010000 B1063_CORNFR
30 INFINITY 0.500000
The parameters of an optical system embodiment of a high resolution wide-angle projection lens of the present invention are given below by taking a 0.65 inch DMD chip as an example. The parameters of the projection lens are as follows:
SURF RADIUS THICKNESS MATERICAL
2 69.59000 7.000000 K9_CHINA
3 30.86000 8.720000
4 71.38147 5.000000 PMMA
5 18.00000 20.700000
6 INFINITY 2.742000
7 -89.38000 3.000000 SLAL14_OHARA
8 36.08800 24.870000
9 128.13000 3.000000 STIH53_OHARA
10 44.93000 10.300000 NBFD15_HOYA
11 -105.10000 0.150000
12 44.83000 7.000000 ZF1_CHINA
13 -735.74000 24.440000
STO INFINITY 6.850000
15 225.72000 3.750000 NPK52_SCHOTT
16 -16.69200 1.200000 STIH53_OHARA
17 -69.30900 0.710000
18 -205.78000 1.200000 STIH53_OHARA
19 28.18000 4.050000 NPK52_SCHOTT
20 -56.65000 3.640000
twenty one -219.78000 2.600000 NPK52_SCHOTT
SURF RADIUS THICKNESS MATERICAL
twenty two -47.07400 0.150000
twenty three 163.82000 3.350000 NPK52_SCHOTT
twenty four -105.63000 0.150000
25 53.97000 4.300000 STIH53_OHARA
26 -79.19000 2.500000
27 INFINITY 24.000000 K9_CHINA
28 INFINITY 1.000000
29 INFINITY 3.010000 B1063_CORNFR
30 INFINITY 0.500000
S4 非球面参数：
4th Order Coefficient (A) 1.885783e-005
6th Order Coefficient (B) -1.578728e-008
8th Order Coefficient (C) -1.397818e-011
10th Order Coefficient (D) 5.526000 e-014
12th Order Coefficient (E) -5.409204e-017
14th Order Coefficient (F) 2.0408474 e-020
S4 aspheric parameters:
4th Order Coefficient (A) 1.885783e-005
6th Order Coefficient (B) -1.578728e-008
8th Order Coefficient (C) -1.397818e-011
10th Order Coefficient (D) 5.526000 e-014
12th Order Coefficient (E) -5.409204e-017
14th Order Coefficient (F) 2.0408474 e-020
S5 非球面参数：
Conic Constant (K) -1.767484
4th Order Coefficient (A) 4.495645 e-005
6th Order Coefficient (B) 1.751875 e-008
8th Order Coefficient (C) -1.448446e-010
10th Order Coefficient (D) -3.892293 e-014
12th Order Coefficient (E) 8.180335 e-016
14th Order Coefficient (F) -9.183994 e-019
S5 aspheric parameters:
Conic Constant (K) -1.767484
4th Order Coefficient (A) 4.495645 e-005
6th Order Coefficient (B) 1.751875 e-008
8th Order Coefficient (C) -1.448446e-010
10th Order Coefficient (D) -3.892293 e-014
12th Order Coefficient (E) 8.180335 e-016
14th Order Coefficient (F) -9.183994 e-019
参阅图3，本发明高分辩率广角投影仪一实施例的光路轨迹示意图。从图中我们可以看出光线51、光线52以及光线53在进入投影仪之前自上而下排布，光线51、光线52以及光线53在离开投影仪之后自下而上排布，出射图像相对于入射图像是倒置的。光线51、光线52以及光线53在依次通过第一透镜组、第二透镜组以及第三透镜组的过程中，沿第一方向，光线的色差不断得到更好校正。通过光阑和第三透镜组形成的象方远心设计，光线51、光线52以及光线53的对比度和均匀性得到提高。按照对第一透镜组、第二透镜组以及第三透镜组内部各个透镜参数的设定，可以增加投影仪的视场角，降低投射比例。Referring to FIG. 3, a schematic diagram of an optical path of an embodiment of the high resolution wide-angle projector of the present invention is shown. From the figure we can see that the light 51, the light 52 and the light 53 are arranged from top to bottom before entering the projector, and the light 51, the light 52 and the light 53 are arranged from bottom to top after leaving the projector, and the outgoing image is relatively The incident image is inverted. In the process of sequentially passing the light 51, the light ray 52, and the light ray 53 through the first lens group, the second lens group, and the third lens group, the chromatic aberration of the light is continuously corrected in the first direction. The contrast and uniformity of the light rays 51, the light rays 52, and the light rays 53 are improved by the image telecentric design formed by the aperture and the third lens group. According to the setting of each lens parameter in the first lens group, the second lens group and the third lens group, the field of view of the projector can be increased to reduce the projection ratio.
具体实施例可以达到的技术效果为：视场角为105度，投射比例为0.6，焦距F为8.7mm。在投射距离为一米时，投射图像为80英寸。The technical effects that can be achieved by the specific embodiment are: the angle of view is 105 degrees, the projection ratio is 0.6, and the focal length F is 8.7 mm. When the projection distance is one meter, the projected image is 80 inches.
区别于现有技术的情况，本发明通过所述第一透镜组、所述第二透镜组和所述第三透镜组分别进行色差校正，可以实现更好地校正所述投影镜头的色差。并且，利用光阑和所述第三透镜组可以实现象方远心设计，可以提高所述投影镜头的对比度和均匀性。本发明与现有技术相比，能够校正所述投影镜头的色差，提高所述投影镜头的对比度和均匀性，满足了所述投影镜头的市场需求。Different from the prior art, the present invention performs chromatic aberration correction by the first lens group, the second lens group, and the third lens group, respectively, so that the chromatic aberration of the projection lens can be better corrected. Moreover, the image telecentric design can be realized by using the aperture and the third lens group, and the contrast and uniformity of the projection lens can be improved. Compared with the prior art, the invention can correct the chromatic aberration of the projection lens, improve the contrast and uniformity of the projection lens, and meet the market demand of the projection lens.
以上仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。The above are only the embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims (16)

  1. 一种高分辩率广角投影镜头，其特征在于，其焦距投射比例小于0.6，并且包括：A high-resolution wide-angle projection lens characterized in that its focal length projection ratio is less than 0.6, and includes:
    沿第一方向依次设置的第一透镜组、第二透镜组、光阑、第三透镜组以及棱镜组合，所述第一透镜组包括沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第二凸凹负透镜，或沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第一双凹负透镜。 a first lens group, a second lens group, a diaphragm, a third lens group, and a prism combination which are sequentially disposed in a first direction, the first lens group including a first convex-concave negative lens, a convex-concave non-disc disposed in the first direction The spherical mirror and the second convex-concave negative lens, or the first convex-concave negative lens, the convex-concave aspherical mirror, and the first double concave negative lens sequentially disposed in the first direction.
  2. 根据权利要求1所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 1 wherein:
    所述第一透镜组焦距为F1，F1 介于-13毫米与-12毫米之间；所述第一凸凹负透镜焦距为F1-1，F1-1介于-120毫米与-110毫米之间；所述凸凹非球面镜焦距为F1-2， F1-2介于-55毫米与-45毫米之间；所述第二凸凹负透镜或第一双凹负透镜焦距为F1-3，F1-3介于-40毫米与-30毫米之间，所述凸凹非球面镜的材料为有机玻璃，所述第一凸凹负透镜材料的折射率为n1-1，n1-1介于1.48与1.62之间；所述第二凸凹负透镜或第一双凹负透镜材料的折射率为n1-3，n1-3介于1.6与1.7之间。The focal length of the first lens group is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens focal length is F1-1, F1-1 is between -120 mm and -110 mm; the convex-concave aspherical mirror focal length is F1-2 , F1-2 is between -55 mm and -45 mm; the second convex-concave negative lens or the first double concave negative lens has a focal length of F1-3, and F1-3 is between -40 mm and -30 mm, The material of the convex-concave aspherical mirror is plexiglass, the refractive index of the first convex-concave negative lens material is n1-1, n1-1 is between 1.48 and 1.62; the second convex-concave negative lens or the first double concave The negative lens material has a refractive index of n1-3 and n1-3 is between 1.6 and 1.7.
  3. 根据权利要求1所述的高分辩率广角投影镜头，其特征在于：The high resolution wide angle projection lens of claim 1 wherein:
    所述第二透镜组包括沿第一方向依次设置的第三凸凹负透镜、第一双凸正透镜以及第二双凸正透镜。 The second lens group includes a third convex-concave negative lens, a first double convex positive lens, and a second double convex positive lens which are sequentially disposed in the first direction.
  4. 根据权利要求3所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 3, wherein:
    所述第二透镜组焦距为F2，F2介于30毫米与40毫米之间；所述第三凸凹负透镜焦距为F2-1，F2-1介于75毫米与85毫米之间；所述第一双凸正透镜焦距为F2-2，F2-2介 于75毫米与85毫米之间；所述第二双凸正透镜焦距为F2-3，F2-3介于60毫米与80毫米之间，所述第三凸凹负透镜材料的折射率为n2-1，n2-1介于1.8与1.85之间; 所述第一双凸正透镜材料的折射率为n2-2，n2-2介于1.75与1.81之间；所述第二双凸正透镜材料的折射率为n2-3，n2-3介于1.6与1.66之间，所述第三凸凹负透镜与所述第一双凸正透镜为胶合或双分离组合。The focal length of the second lens group is F2, F2 is between 30 mm and 40 mm; the focal length of the third convex-concave negative lens is F2-1, and F2-1 is between 75 mm and 85 mm; The focal length of a pair of convex positive lenses is F2-2, F2-2 Between 75 mm and 85 mm; the second biconvex positive lens has a focal length of F2-3, F2-3 is between 60 mm and 80 mm, and the third convex-concave negative lens material has a refractive index of n2- 1, n2-1 is between 1.8 and 1.85; The refractive index of the first biconvex positive lens material is n2-2, n2-2 is between 1.75 and 1.81; the refractive index of the second biconvex positive lens material is n2-3, n2-3 is Between 1.6 and 1.66, the third convex-concave negative lens and the first double convex positive lens are glued or double-separated.
  5. 根据权利要求1所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 1 wherein:
    所述第三透镜组包括沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五双凸正透镜、第六双凸正透镜以及第七双凸 正透镜，或沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五凹凸正透镜、第六双凸正透镜以及第七双凸正透镜。The third lens group includes a third double convex positive lens, a fourth concave concave negative lens, a second double concave negative lens, a fourth double convex positive lens, a fifth double convex positive lens, and a sixth portion which are sequentially disposed in the first direction Double convex positive lens and seventh double convex a positive lens, or a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, a fourth double convex positive lens, a fifth concave positive lens, and a sixth double convex positive lens which are sequentially disposed in the first direction And a seventh double convex positive lens.
  6. 根据权利要求5所述的高分辩率广角投影镜头，其特征在于： The high resolution wide-angle projection lens according to claim 5, wherein:
    所述第三透镜组焦距为F3，F3介于40毫米与50毫米之间；所述第三双凸正透镜焦距为F3-1，F3-1介于-300毫米与-200毫米之间；所述第四凹凸负透镜焦距为F3-2， F3-2介于-300毫米与-200毫米之间；所述第二双凹负透镜焦距为F3-3，F3-3介于-100毫米与-80毫米之间；所述第四双凸正透镜焦距为F3-4，F3-4介于-100毫米与-80毫米之间；所述第五双凸正透镜或第五凹凸正透镜焦距为F3-5，F3-5介于140毫米与160毫米之间；所述第六双凸正透镜焦距为F3-6，F3-6介于85毫米与110毫米之间；所述第七双凸正透镜焦距为F3-7，F3-7介于35毫米与45毫米之间，所述第三双凸正透镜材料的折射率为n3-1，n3-1介于1.48与-1.52之间；所述第四凹凸负透镜材料的折射率为n3-2，n3-2介于1.8与1.85之间；所述第二双凹负透镜材料的折射率为n3-3，n3-3介于1.8与1.85之间；所述第四双凸正透镜材料的折射率为n3-4，n3-4介于1.48与1.52之间；所述第五双凸正透镜或第五凹凸正透镜材料的折射率为n3-5，n3-5介于1.48与1.52之间；所述第六双凸正透镜材料的折射率为n3-6，n3-6介于1.48与1.52之间；所述第七双凸正透镜材料的折射率为n3-7，n3-7介于1.8与1.85之间，所述第三双凸正透镜、所述第四凹凸负透镜、所述第二双凹负透镜和所述第四双凸正透镜为胶合组合。 The focal length of the third lens group is F3, F3 is between 40 mm and 50 mm; the focal length of the third double convex positive lens is F3-1, and the F3-1 is between -300 mm and -200 mm; The focal length of the fourth concave-convex negative lens is F3-2, F3-2 is between -300 mm and -200 mm; the second double concave negative lens focal length is F3-3, F3-3 is between -100 mm and -80 mm; the fourth biconvex The positive lens focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth double convex positive lens or the fifth concave positive lens has a focal length of F3-5 and F3-5 is 140 mm. Between 160 mm; the sixth double convex positive lens focal length is F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens focal length is F3-7, F3-7 Between 35 mm and 45 mm, the third biconvex positive lens material has a refractive index n3-1, n3-1 is between 1.48 and -1.52; and the fourth concave-convex negative lens material has a refractive index N3-2, n3-2 is between 1.8 and 1.85; the second double concave negative lens material has a refractive index of n3-3, n3-3 is between 1.8 and 1.85; the fourth biconvex The refractive index of the positive lens material is n3-4, n3-4 is between 1.48 and 1.52; the refractive index of the fifth double convex positive lens or the fifth concave positive lens material is n3-5, n3-5 is between Between 1.48 and 1.52; the sixth biconvex positive lens material has a refractive index of n3-6, n3-6 is between 1.4 Between 8 and 1.52; the seventh biconvex positive lens material has a refractive index of n3-7, n3-7 is between 1.8 and 1.85, the third biconvex positive lens, the fourth concave and convex negative lens The second double concave negative lens and the fourth double convex positive lens are glued combinations.
  7. 一种高分辩率广角投影镜头，其特征在于，其焦距投射比例小于0.6，并且包括： A high-resolution wide-angle projection lens characterized in that its focal length projection ratio is less than 0.6, and includes:
    沿第一方向依次设置的第一透镜组、第二透镜组、光阑以及第三透镜组。 The first lens group, the second lens group, the aperture, and the third lens group are sequentially disposed in the first direction.
  8. 根据权利要求7所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 7 wherein:
    所述镜头包括以第一方向为参考而设置于第三透镜组前面的棱镜组合。 The lens includes a prism combination disposed in front of the third lens group with reference to the first direction.
  9. 根据权利要求7所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 7 wherein:
    所述第一透镜组包括沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第二凸凹负透镜，或沿第一方向依次设置的第一凸凹负透镜、凸凹非球面镜以及第一 双凹负透镜。The first lens group includes a first convex-concave negative lens, a convex-concave aspherical mirror, and a second convex-concave negative lens sequentially disposed in a first direction, or a first convex-concave negative lens, a convex-concave aspherical mirror, and a first Double concave negative lens.
  10. 根据权利要求9所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 9 wherein:
    所述第一透镜组焦距为F1，F1 介于-13毫米与-12毫米之间；所述第一凸凹负透镜焦距为F1-1，F1-1介于-120毫米与-110毫米之间；所述凸凹非球面镜焦距为F1-2， F1-2介于-55毫米与-45毫米之间；所述第二凸凹负透镜或第一双凹负透镜焦距为F1-3，F1-3介于-40毫米与-30毫米之间，所述凸凹非球面镜的材料为有机玻璃，所述第一凸凹负透镜材料的折射率为n1-1，n1-1介于1.48与1.62之间；所述第二凸凹负透镜或第一双凹负透镜材料的折射率为n1-3，n1-3介于1.6与1.7之间。The focal length of the first lens group is F1, F1 Between -13 mm and -12 mm; the first convex-concave negative lens focal length is F1-1, F1-1 is between -120 mm and -110 mm; the convex-concave aspherical mirror focal length is F1-2 , F1-2 is between -55 mm and -45 mm; the second convex-concave negative lens or the first double concave negative lens has a focal length of F1-3, and F1-3 is between -40 mm and -30 mm, The material of the convex-concave aspherical mirror is plexiglass, the refractive index of the first convex-concave negative lens material is n1-1, n1-1 is between 1.48 and 1.62; the second convex-concave negative lens or the first double concave The negative lens material has a refractive index of n1-3 and n1-3 is between 1.6 and 1.7.
  11. 根据权利要求7所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 7 wherein:
    所述第二透镜组包括沿第一方向依次设置的第三凸凹负透镜、第一双凸正透镜以及第二双凸正透镜。 The second lens group includes a third convex-concave negative lens, a first double convex positive lens, and a second double convex positive lens which are sequentially disposed in the first direction.
  12. 根据权利要求11所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 11 wherein:
    所述第二透镜组焦距为F2，F2介于30毫米与40毫米之间；所述第三凸凹负透镜焦距为F2-1，F2-1介于75毫米与85毫米之间；所述第一双凸正透镜焦距为F2-2，F2-2介 于75毫米与85毫米之间；所述第二双凸正透镜焦距为F2-3，F2-3介于60毫米与80毫米之间，所述第三凸凹负透镜材料的折射率为n2-1，n2-1介于1.8与1.85之间; 所述第一双凸正透镜材料的折射率为n2-2，n2-2介于1.75与1.81之间；所述第二双凸正透镜材料的折射率为n2-3，n2-3介于1.6与1.66之间，所述第三凸凹负透镜与所述第一双凸正透镜为胶合或双分离组合。The focal length of the second lens group is F2, F2 is between 30 mm and 40 mm; the focal length of the third convex-concave negative lens is F2-1, and F2-1 is between 75 mm and 85 mm; The focal length of a pair of convex positive lenses is F2-2, F2-2 Between 75 mm and 85 mm; the second biconvex positive lens has a focal length of F2-3, F2-3 is between 60 mm and 80 mm, and the third convex-concave negative lens material has a refractive index of n2- 1, n2-1 is between 1.8 and 1.85; The refractive index of the first biconvex positive lens material is n2-2, n2-2 is between 1.75 and 1.81; the refractive index of the second biconvex positive lens material is n2-3, n2-3 is Between 1.6 and 1.66, the third convex-concave negative lens and the first double convex positive lens are glued or double-separated.
  13. 根据权利要求7所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 7 wherein:
    所述第三透镜组包括沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五双凸正透镜、第六双凸正透镜以及第七双凸 正透镜，或沿第一方向依次设置的第三双凸正透镜、第四凹凸负透镜、第二双凹负透镜、第四双凸正透镜、第五凹凸正透镜、第六双凸正透镜以及第七双凸正透镜。The third lens group includes a third double convex positive lens, a fourth concave concave negative lens, a second double concave negative lens, a fourth double convex positive lens, a fifth double convex positive lens, and a sixth portion which are sequentially disposed in the first direction Double convex positive lens and seventh double convex a positive lens, or a third double convex positive lens, a fourth concave negative lens, a second double concave negative lens, a fourth double convex positive lens, a fifth concave positive lens, and a sixth double convex positive lens which are sequentially disposed in the first direction And a seventh double convex positive lens.
  14. 根据权利要求13所述的高分辩率广角投影镜头，其特征在于： The high resolution wide angle projection lens of claim 13 wherein:
    所述第三透镜组焦距为F3，F3介于40毫米与50毫米之间；所述第三双凸正透镜焦距为F3-1，F3-1介于-300毫米与-200毫米之间；所述第四凹凸负透镜焦距为F3-2， F3-2介于-300毫米与-200毫米之间；所述第二双凹负透镜焦距为F3-3，F3-3介于-100毫米与-80毫米之间；所述第四双凸正透镜焦距为F3-4，F3-4介于-100毫米与-80毫米之间；所述第五双凸正透镜或第五凹凸正透镜焦距为F3-5，F3-5介于140毫米与160毫米之间；所述第六双凸正透镜焦距为F3-6，F3-6介于85毫米与110毫米之间；所述第七双凸正透镜焦距为F3-7，F3-7介于35毫米与45毫米之间，所述第三双凸正透镜材料的折射率为n3-1，n3-1介于1.48与-1.52之间；所述第四凹凸负透镜材料的折射率为n3-2，n3-2介于1.8与1.85之间；所述第二双凹负透镜材料的折射率为n3-3，n3-3介于1.8与1.85之间；所述第四双凸正透镜材料的折射率为n3-4，n3-4介于1.48与1.52之间；所述第五双凸正透镜或第五凹凸正透镜材料的折射率为n3-5，n3-5介于1.48与1.52之间；所述第六双凸正透镜材料的折射率为n3-6，n3-6介于1.48与1.52之间；所述第七双凸正透镜材料的折射率为n3-7，n3-7介于1.8与1.85之间，所述第三双凸正透镜、所述第四凹凸负透镜、所述第二双凹负透镜和所述第四双凸正透镜为胶合组合。The focal length of the third lens group is F3, F3 is between 40 mm and 50 mm; the focal length of the third double convex positive lens is F3-1, and the F3-1 is between -300 mm and -200 mm; The focal length of the fourth concave-convex negative lens is F3-2, F3-2 is between -300 mm and -200 mm; the second double concave negative lens focal length is F3-3, F3-3 is between -100 mm and -80 mm; the fourth biconvex The positive lens focal length is F3-4, F3-4 is between -100 mm and -80 mm; the fifth double convex positive lens or the fifth concave positive lens has a focal length of F3-5 and F3-5 is 140 mm. Between 160 mm; the sixth double convex positive lens focal length is F3-6, F3-6 is between 85 mm and 110 mm; the seventh double convex positive lens focal length is F3-7, F3-7 Between 35 mm and 45 mm, the third biconvex positive lens material has a refractive index n3-1, n3-1 is between 1.48 and -1.52; and the fourth concave-convex negative lens material has a refractive index N3-2, n3-2 is between 1.8 and 1.85; the second double concave negative lens material has a refractive index of n3-3, n3-3 is between 1.8 and 1.85; the fourth biconvex The refractive index of the positive lens material is n3-4, n3-4 is between 1.48 and 1.52; the refractive index of the fifth double convex positive lens or the fifth concave positive lens material is n3-5, n3-5 is between Between 1.48 and 1.52; the sixth biconvex positive lens material has a refractive index of n3-6, n3-6 is between 1.4 Between 8 and 1.52; the seventh biconvex positive lens material has a refractive index of n3-7, n3-7 is between 1.8 and 1.85, the third biconvex positive lens, the fourth concave and convex negative lens The second double concave negative lens and the fourth double convex positive lens are glued combinations.
  15. 一种高分辩率广角投影仪，其特征在于，包括被投影芯片和如权利要求7所述的高分辩率广角投影镜头，以第一方向为参考，所述被投影芯片设置于第三透镜组前面。A high-resolution wide-angle projector, comprising: a projection chip and the high-resolution wide-angle projection lens according to claim 7, with reference to a first direction, the projected chip being disposed on a third lens group front.
  16. 根据权利要求15所述的高分辩率广角投影仪，其特征在于，所述投影仪包括：位于第三透镜组和被投影芯片之间的棱镜组合。 The high resolution wide angle projector of claim 15 wherein said projector comprises: a prism combination between said third lens group and said projected chip.
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CN103439784A (en) * 2011-11-15 2013-12-11 深圳市亿思达显示科技有限公司 High-resolution wide-angle projection lens and projector
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