CN103454756A - Zoom projection lens - Google Patents
Zoom projection lens Download PDFInfo
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- CN103454756A CN103454756A CN2012101755777A CN201210175577A CN103454756A CN 103454756 A CN103454756 A CN 103454756A CN 2012101755777 A CN2012101755777 A CN 2012101755777A CN 201210175577 A CN201210175577 A CN 201210175577A CN 103454756 A CN103454756 A CN 103454756A
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Abstract
The invention discloses a zoom projection lens which is used for a digital light processing (DLP) projector. The zoom projection lens comprises a first lens group arranged on the object side and a second lens group arranged on the image side. The first lens group comprises a first lens, a second lens and a third lens. The second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens. The ten lenses are sequentially arranged from the object side to the image side and are all spherical lenses made of glass materials. The zoom projection lens is high in imaging quality, low in cost, small in size, small in performance change along with temperature, simple in structure, low in sensitivity and high in mass production.
Description
Technical field
The present invention relates to a kind of projection lens, be specifically related to a kind of Zooming-projection camera lens.
Background technology
Along with scientific and technological development, projection display technique is constantly progressive, and projector is widely used in the every field such as commercial affairs, education, home theater.Wherein, (the Digital Light Procession of digital micro-mirror cell processing projector, DLP) become gradually one of main flow projector, also more and more higher by the demand of projection lens to DLP, along with improving constantly of projector's brightness, the requirement that temperature variation performance with projection lens is changed is also more and more higher, and in existing technology, the temperature of a lot of camera lenses raises with the rising of projector's internal temperature, and the projection performance degradation is very serious.
Summary of the invention
For addressing the above problem, the invention provides the Zooming-projection camera lens of a kind of high-performance, miniaturization.
For achieving the above object, the invention provides following technical scheme: a kind of Zooming-projection camera lens, for DLP projector, comprise the first lens group of being located at the thing side and be located at the second lens combination as side, described first lens group comprises first lens, the second lens and the 3rd lens; Described the second lens combination comprises the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens and the tenth lens; Described first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens and the tenth lens are arranged in order and are the spherical lens of glass material from the object side to image side.
Preferably, described first lens and the 7th lens are meniscus shaped lens, and described the second lens are biconcave lens; Described the 3rd lens, the 4th lens and the tenth lens are biconvex lens; Described the 5th lens and the 6th lens are glued together and shape is complementary biconvex lens and biconcave lens; Described the 8th lens and the 9th lens are meniscus shaped lens glued together and that shape is complementary.
Preferably, described first lens, the 7th lens, the 8th lens and the 9th lens are the bent moon concave side to described picture side.
Preferably, the scope of described first lens refractive index n 1 is 1.735<n1<1.785, and the scope of dispersion v1 is 49<v1<53; The scope of described the second index of refraction in lens n2 is 1.775<n2<1.825, and the scope of dispersion v2 is 45.5<v2<50.5; The scope of described the 3rd index of refraction in lens n3 is 1.775<n3<1.825, and the scope of dispersion v3 is 27.5<v3<32.5; The scope of described the 4th index of refraction in lens n4 is 1.585<n4<1.635, and the scope of dispersion v4 is 58.5<v3<63.5; The scope of described the 5th index of refraction in lens n5 is 1.51<n5<1.56, and the scope of dispersion v5 is 63.0<v5<68.0; The scope of described the 6th index of refraction in lens n6 is 1.775<n6<1.825, and the scope of dispersion v6 is 23.5<v6<28.5; The scope of described the 7th index of refraction in lens n7 is 1.775<n7<1.825, and the scope of dispersion v7 is 45.5<v7<50.5; The scope of described the 8th index of refraction in lens n8 is 1.645<n8<1.695, and the scope of dispersion v8 is 30.0<v8<35.0; The scope of described the 9th index of refraction in lens n9 is 1.75<n9<1.80, and the scope of dispersion v9 is 23.0<v9<28.0; The scope of described the tenth index of refraction in lens n10 is 1.775<n10<1.825, and the scope of dispersion v10 is 45.0<v10<50.0.
Preferably, the opposite face of described the 3rd lens and the tenth lens is respectively equipped with a light diaphragm and an aperture diaphragm.
Preferably, the focal power of described first lens group is for negative, and described first lens and the second power of lens are for negative; Described the 3rd power of lens is for just.
Preferably, the focal power of described the second lens combination is being for just, and described the 4th lens, the 5th lens, the 7th lens, the 8th lens and the tenth power of lens are for just; Described the 6th lens and the 9th power of lens are for negative.
Preferably, the focal length f2 of the focal length f1 of described first lens group and the second lens combination meets following funtcional relationship:
Preferably, the camera lens total length LWID of described Zooming-projection camera lens and camera lens focal length EFL meet following funtcional relationship:
Adopt the beneficial effect of above technical scheme to be: at first, because described lens all adopt global surface glass material, guaranteed that the temperature variant performance change of projection lens is very little, can meet projector's brightness fully and improve the demand to the temperature drift of projection lens; And the 5th lens in the present invention are connected with the 6th lens gummed, the 8th lens are connected with the 9th lens gummed, the ratio chromatism, effectively reduced; Simultaneously, described the tenth lens are provided with aperture diaphragm, have effectively reduced the external diameter of the tenth lens; The 4th, in the 3rd lens settings the light diaphragm, effectively prevent that the diaphragm UV light from entering imaging system and weakening image quality, further improves whole image quality; The 5th, image quality of the present invention is high, with low cost, and volume is little, and performance varies with temperature little, and simple in structure, and sensitivity is low, and production is high.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
The aberration diagram that Fig. 2 is WIDE in the present invention (comprising spherical aberration, distortion, place, coma, chromatism of position and ratio chromatism, etc.);
Fig. 3 is the aberration diagram for TELE in the present invention (comprising spherical aberration, distortion, place, coma, chromatism of position and ratio chromatism, etc.);
The wave optics MTF that Fig. 4 is WIDE white in the present invention;
The wave optics MTF that Fig. 5 is TELE white in the present invention;
The SPOT figure that Fig. 6 is WIDE in the present invention;
The SPOT figure that Fig. 7 is TELE in the present invention;
The peripheral light amount ratio that Fig. 8 is WIDE and TELE in the present invention.
Wherein, S1. aperture diaphragm S2. light diaphragm G1. first lens G2. the second lens G3. the 3rd lens G4. the 4th lens G5. the 5th lens G6. the 6th lens G7. the 7th lens G8. the 8th lens G9. the 9th lens G10. the tenth lens.
Embodiment
Describe the preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.
Embodiment 1
Referring to Fig. 1, as shown in legend wherein, a kind of Zooming-projection camera lens, for DLP projector, comprise a first lens group of being located at the thing side and be located at one second lens combination as side, described first lens group comprises a first lens G1, one second lens G2 and one the 3rd lens G3; Described the second lens combination comprises one the 4th lens G4, one the 5th lens G5, one the 6th lens G6, one the 7th lens G7, one the 8th lens G8, one the 9th lens G9 and 1 the tenth lens G10; Described first lens G1, the second lens G2, the 3rd lens G3, the 4th lens G4, the 5th lens G5, the 6th lens G6, the 7th lens G7, the 8th lens G8, the 9th lens G9 and the tenth lens G10 are arranged in order and are the spherical lens of glass material from the object side to image side.
Described first lens G1 and the 7th lens G7 are meniscus shaped lens, and described the second lens G2 is biconcave lens; Described the 3rd lens G3, the 4th lens G4 and the tenth lens G10 are biconvex lens; Described the 5th lens G5 and the 6th lens G6 is glued together and shape is complementary biconvex lens and biconcave lens; Described the 8th lens G8 and the 9th lens G9 are meniscus shaped lens glued together and that shape is complementary.
Described first lens G1, the 7th lens G7, the 8th lens G8 and the 9th lens G9 are the bent moon concave side to described picture side.
Described first lens G1 refractive index n 1 is 1.745, and dispersion v1 is 50; Described the second lens G2 refractive index n 2 is 1.785, and dispersion v2 is 46.5; Described the 3rd lens G3 refractive index n 3 is 1.785, and dispersion v3 is 28.5; Described the 4th lens G4 refractive index n 4 is 1.595, and dispersion v4 is 59.5; Described the 5th lens G5 refractive index n 5 is 1.52, and dispersion v5 is 64.0; Described the 6th lens G6 refractive index n 6 is 1.785, and dispersion v6 is 24.5; Described the 7th lens G7 refractive index n 7 is 1.785, and dispersion v7 is 46.5; Described the 8th lens G8 refractive index n 8 is 1.655, and dispersion v8 is 31.0; Described the 9th lens G9 refractive index n 9 is 1.76, and dispersion v9 is 24.0; Described the tenth lens G10 refractive index n 10 is 1.785, and dispersion v10 is 46.0.
The opposite face of described the 3rd lens G3 and the tenth lens G10 is respectively equipped with a light diaphragm S2 and an aperture diaphragm S1, and described aperture diaphragm S1 has effectively reduced the external diameter of the tenth lens G10, and the external diameter of described the tenth lens G10 is Φ 9mm; Described light diaphragm S2 effectively prevents that the diaphragm UV light from entering imaging system and weakening image quality, further improves whole image quality.
The focal power of described first lens group is for negative, and the focal power of described first lens G1 and the second lens G2 is for negative; The focal power of described the 3rd lens G3 is for just.
The focal power of described the second lens combination is being for just, and the focal power of described the 4th lens G4, the 5th lens G5, the 7th lens G7, the 8th lens G8 and the tenth lens G10 is for just; The focal power of described the 6th lens G6 and the 9th lens G9 is for negative.
The focal length f1 of described first lens group and the focal length f2 of the second lens combination meet following funtcional relationship:
The camera lens total length LWID of described Zooming-projection camera lens and camera lens focal length EFL meet following funtcional relationship:
Described the 3rd lens G3 and the 4th lens G4 are spaced apart 13.68mm, and the face that described the 4th lens G4 is relative with described the 3rd lens G3 is larger, light by the 3rd lens G3 and the 4th lens G4 is mild, by changing the 3rd lens G3, focusing and the zoom of whole projection lens realized at the interval of the 4th lens G4.
Design basis projected picture of the present invention is 60 inches, by zoom and focusing, can guarantee the image quality of the projected picture of 30 inches to 300 inches.
Referring to Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, Fig. 2 be in the present invention WIDE differ figure (comprise spherical aberration, distortion, place, coma, chromatism of position and ratio chromatism); Fig. 3 is the aberration diagram for TELE in the present invention (comprising spherical aberration, distortion, place, coma, chromatism of position and ratio chromatism, etc.); The wave optics MTF that Fig. 4 is WIDE white in the present invention; The wave optics MTF that Fig. 5 is TELE white in the present invention; The SPOT figure that Fig. 6 is WIDE in the present invention; The SPOT figure that Fig. 7 is TELE in the present invention; The peripheral light amount ratio that Fig. 8 is WIDE and TELE in the present invention, optical distortion of the present invention is less than 1.5%.
Referring to Fig. 8, the peripheral light amount ratio that Fig. 8 is WIDE and TELE in the present invention, largest perimeter light amount ratio of the present invention is greater than 50%.
Embodiment 2
All the other are identical with described embodiment 1, and difference is, described first lens G1 refractive index n 1 is 1.755, and dispersion v1 is 51; Described the second lens G2 refractive index n 2 is 1.795, and dispersion v2 is 47.5; Described the 3rd lens G3 refractive index n 3 is 1.795, and dispersion v3 is 29.5; Described the 4th lens G4 refractive index n 4 is 1.605, and dispersion v4 is 60.5; Described the 5th lens G5 refractive index n 5 is 1.53, and dispersion v5 is 65.0; Described the 6th lens G6 refractive index n 6 is 1.795, and dispersion v6 is 25.5; Described the 7th lens G7 refractive index n 7 is 1.795, and dispersion v7 is 47.5; Described the 8th lens G8 refractive index n 8 is 1.665, and dispersion v8 is 32.0; Described the 9th lens G9 refractive index n 9 is 1.77, and dispersion v9 is 25.0; Described the tenth lens G10 refractive index n 10 is 1.795, and dispersion v10 is 47.0.
Embodiment 3
All the other are identical with described embodiment 1, and difference is, described first lens G1 refractive index n 1 is 1.765, and dispersion v1 is 52; Described the second lens G2 refractive index n 2 is 1.805, and dispersion v2 is 48.5; Described the 3rd lens G3 refractive index n 3 is 1.805, and dispersion v3 is 30.5; Described the 4th lens G4 refractive index n 4 is 1.615, and dispersion v4 is 61.5; Described the 5th lens G5 refractive index n 5 is 1.54, and dispersion v5 is 66.0; Described the 6th lens G6 refractive index n 6 is 1.805, and dispersion v6 is 26.5; Described the 7th lens G7 refractive index n 7 is 1.805, and dispersion v7 is 48.5; Described the 8th lens G8 refractive index n 8 is 1.675, and dispersion v8 is 33.0; Described the 9th lens G9 refractive index n 9 is 1.78, and dispersion v9 is 26.0; Described the tenth lens G10 refractive index n 10 is 1.805, and dispersion v10 is 48.0.
All the other are identical with described embodiment 1, and difference is, described first lens G1 refractive index n 1 is 1.775, and dispersion v1 is 52; Described the second lens G2 refractive index n 2 is 1.815, and dispersion v2 is 49.5; Described the 3rd lens G3 refractive index n 3 is 1.815, and dispersion v3 is 31.5; Described the 4th lens G4 refractive index n 4 is 1.625, and dispersion v4 is 62.5; Described the 5th lens G5 refractive index n 5 is 1.55, and dispersion v5 is 67.0; Described the 6th lens G6 refractive index n 6 is 1.815, and dispersion v6 is 27.5; Described the 7th lens G7 refractive index n 7 is 1.815, and dispersion v7 is 49.5; Described the 8th lens G8 refractive index n 8 is 1.685, and dispersion v8 is 34.0; Described the 9th lens G9 refractive index n 9 is 1.79, and dispersion v9 is 27.0; Described the tenth lens G10 refractive index n 10 is 1.815, and dispersion v10 is 49.0.
Adopt the beneficial effect of above technical scheme to be: at first, because described lens all adopt global surface glass material, guaranteed that the temperature variant performance change of projection lens is very little, can meet projector's brightness fully and improve the demand to the temperature drift of projection lens; And the 5th lens in the present invention are connected with the 6th lens gummed, the 8th lens are connected with the 9th lens gummed, the ratio chromatism, effectively reduced; Simultaneously, described the tenth lens are provided with aperture diaphragm, have effectively reduced the external diameter of the tenth lens; The 4th, in the 3rd lens settings the light diaphragm, effectively prevent that the diaphragm UV light from entering imaging system and weakening image quality, further improves whole image quality; The 5th, image quality of the present invention is high, with low cost, and volume is little, and performance varies with temperature little, and simple in structure, and sensitivity is low, and production is high.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (9)
1. a Zooming-projection camera lens, for DLP projector, is characterized in that, comprises the first lens group of being located at the thing side and be located at the second lens combination as side, and described first lens group comprises first lens, the second lens and the 3rd lens; Described the second lens combination comprises the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens and the tenth lens; Described first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens and the tenth lens are arranged in order and are the spherical lens of glass material from the object side to image side.
2. Zooming-projection camera lens according to claim 1, is characterized in that, described first lens and the 7th lens are meniscus shaped lens, and described the second lens are biconcave lens; Described the 3rd lens, the 4th lens and the tenth lens are biconvex lens; Described the 5th lens and the 6th lens are glued together and shape is complementary biconvex lens and biconcave lens; Described the 8th lens and the 9th lens are meniscus shaped lens glued together and that shape is complementary.
3. Zooming-projection camera lens according to claim 2, is characterized in that, described first lens, the 7th lens, the 8th lens and the 9th lens are the bent moon concave side to described picture side.
4. Zooming-projection camera lens according to claim 3, is characterized in that, the scope of described first lens refractive index n 1 is 1.735<n1<1.785, and the scope of dispersion v1 is 49<v1<53; The scope of described the second index of refraction in lens n2 is 1.775<n2<1.825, and the scope of dispersion v2 is 45.5<v2<50.5; The scope of described the 3rd index of refraction in lens n3 is 1.775<n3<1.825, and the scope of dispersion v3 is 27.5<v3<32.5; The scope of described the 4th index of refraction in lens n4 is 1.585<n4<1.635, and the scope of dispersion v4 is 58.5<v3<63.5; The scope of described the 5th index of refraction in lens n5 is 1.51<n5<1.56, and the scope of dispersion v5 is 63.0<v5<68.0; The scope of described the 6th index of refraction in lens n6 is 1.775<n6<1.825, and the scope of dispersion v6 is 23.5<v6<28.5; The scope of described the 7th index of refraction in lens n7 is 1.775<n7<1.825, and the scope of dispersion v7 is 45.5<v7<50.5; The scope of described the 8th index of refraction in lens n8 is 1.645<n8<1.695, and the scope of dispersion v8 is 30.0<v8<35.0; The scope of described the 9th index of refraction in lens n9 is 1.75<n9<1.80, and the scope of dispersion v9 is 23.0<v9<28.0; The scope of described the tenth index of refraction in lens n10 is 1.775<n10<1.825, and the scope of dispersion v10 is 45.0<v10<50.0.
5. Zooming-projection camera lens according to claim 4, is characterized in that, the opposite face of described the 3rd lens and the tenth lens is respectively equipped with a light diaphragm and an aperture diaphragm.
6. Zooming-projection camera lens according to claim 5, is characterized in that, the focal power of described first lens group is for negative, and described first lens and the second power of lens are for negative; Described the 3rd power of lens is for just.
7. Zooming-projection camera lens according to claim 6, is characterized in that, the focal power of described the second lens combination is being for just, and described the 4th lens, the 5th lens, the 7th lens, the 8th lens and the tenth power of lens are for just; Described the 6th lens and the 9th power of lens are for negative.
8. Zooming-projection camera lens according to claim 7, is characterized in that, the focal length f1 of described first lens group and the focal length f2 of the second lens combination meet following funtcional relationship:
9. Zooming-projection camera lens according to claim 8, is characterized in that, the camera lens total length LWID of described Zooming-projection camera lens and camera lens focal length EFL meet following funtcional relationship:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101755777A CN103454756A (en) | 2012-05-31 | 2012-05-31 | Zoom projection lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101755777A CN103454756A (en) | 2012-05-31 | 2012-05-31 | Zoom projection lens |
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| CN103454756A true CN103454756A (en) | 2013-12-18 |
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| CN2012101755777A Pending CN103454756A (en) | 2012-05-31 | 2012-05-31 | Zoom projection lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955046A (en) * | 2014-03-20 | 2014-07-30 | 苏州佳世达光电有限公司 | Projection lens and projection apparatus |
| US9720215B2 (en) | 2015-11-27 | 2017-08-01 | Coretronic Corporation | Zoom lens |
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|---|---|---|---|---|
| CN201122199Y (en) * | 2007-06-12 | 2008-09-24 | 利达光电股份有限公司 | DLP zooming projection lens |
| CN101770067A (en) * | 2008-12-26 | 2010-07-07 | 佳能株式会社 | Optical system and optical apparatus including optical system |
| US20100271601A1 (en) * | 2009-04-28 | 2010-10-28 | Masaru Amano | Projecting zoom lens and projection type display apparatus |
| EP2287648A2 (en) * | 2009-08-17 | 2011-02-23 | Canon Kabushiki Kaisha | Optical system and optical apparatus having the same |
| CN102436060A (en) * | 2011-12-15 | 2012-05-02 | 北京振兴计量测试研究所 | Athermal visible light zoom lens |
| CN202600247U (en) * | 2012-05-31 | 2012-12-12 | 苏州智能泰克有限公司 | Zoom projection lens |
-
2012
- 2012-05-31 CN CN2012101755777A patent/CN103454756A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201122199Y (en) * | 2007-06-12 | 2008-09-24 | 利达光电股份有限公司 | DLP zooming projection lens |
| CN101770067A (en) * | 2008-12-26 | 2010-07-07 | 佳能株式会社 | Optical system and optical apparatus including optical system |
| US20100271601A1 (en) * | 2009-04-28 | 2010-10-28 | Masaru Amano | Projecting zoom lens and projection type display apparatus |
| EP2287648A2 (en) * | 2009-08-17 | 2011-02-23 | Canon Kabushiki Kaisha | Optical system and optical apparatus having the same |
| CN102436060A (en) * | 2011-12-15 | 2012-05-02 | 北京振兴计量测试研究所 | Athermal visible light zoom lens |
| CN202600247U (en) * | 2012-05-31 | 2012-12-12 | 苏州智能泰克有限公司 | Zoom projection lens |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955046A (en) * | 2014-03-20 | 2014-07-30 | 苏州佳世达光电有限公司 | Projection lens and projection apparatus |
| US9720215B2 (en) | 2015-11-27 | 2017-08-01 | Coretronic Corporation | Zoom lens |
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Application publication date: 20131218 |