WO2013071676A1 - Lentille de projection grand angle haute résolution et projecteur - Google Patents

Lentille de projection grand angle haute résolution et projecteur 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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Prior art keywords
lens
convex
double
concave
positive lens
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PCT/CN2011/084807
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English (en)
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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Publication of WO2013071676A1 publication Critical patent/WO2013071676A1/fr

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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.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

L'invention concerne une lentille de projection grand angle haute résolution et un projecteur. Le rapport de projection de la lentille de projection est de moins de 0,6. La lentille de projection comprend : un premier groupe de lentilles (11), un deuxième groupe de lentille (12), un diaphragme (13) et un troisième groupe de lentilles (14) qui sont disposés séquentiellement dans une première direction. Le projecteur comprend une puce projetée (16) et la lentille de projection grand angle haute résolution. En ce qui concerne la première direction, la puce projetée est disposée devant le troisième groupe de lentilles, étalonnant ainsi les aberrations chromatiques de la lentille de projection et du projecteur, et améliorant le rapport de contraste et la régularité.
PCT/CN2011/084807 2011-11-15 2011-12-28 Lentille de projection grand angle haute résolution et projecteur WO2013071676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201110361675 CN102590985B (zh) 2011-11-15 2011-11-15 一种高分辩率广角投影镜头及投影仪
CN201110361675.5 2011-11-15

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WO2013071676A1 true WO2013071676A1 (fr) 2013-05-23

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CN111624836A (zh) * 2020-07-20 2020-09-04 南阳南方智能光电有限公司 一种标准微投投射镜头
WO2023206784A1 (fr) * 2022-04-29 2023-11-02 歌尔光学科技有限公司 Système de projection optique et dispositif électronique

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