CN103439783A - High-resolution wide-angle projection lens and projector - Google Patents
High-resolution wide-angle projection lens and projector Download PDFInfo
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- CN103439783A CN103439783A CN2013103789289A CN201310378928A CN103439783A CN 103439783 A CN103439783 A CN 103439783A CN 2013103789289 A CN2013103789289 A CN 2013103789289A CN 201310378928 A CN201310378928 A CN 201310378928A CN 103439783 A CN103439783 A CN 103439783A
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Abstract
The invention discloses a high-resolution wide-angle projection lens and a projector. The focal distance projection ratio of the projection lens is smaller than 0.6. The high-resolution wide-angle projection lens comprises a first lens set, a second lens set, a diaphragm and a third lens set, wherein the first lens set, the second lens set, the diaphragm and the third lens set are sequentially arranged in the first direction. Meanwhile, the invention relates to the high-resolution wide-angle projector. The projector comprises a chip to be projected and the high-resolution wide-angle projection lens. The chip to be projected is arranged in front of the third lens set with the first direction as the reference. Through the structure, the chromatic aberration of the projection lens and the chromatic aberration of the projector can be corrected, and the contrast ratio and the uniformity are improved.
Description
Technical field
Dividing an application of the present invention's " a kind of high-resolution wide-angle projection lens and projector " by name that to be the applicant propose on November 15th, 2011, patented claim that application number is 2011103616755, the present invention relates to optical technical field, particularly relate to high-resolution wide-angle projection lens and projector.
Background technology
The focal length of the projection lens generally used at present is larger, and field angle is less, and field angle is generally less than 60 degree, so projection ratio (Throw Ratio) is larger, and the projection ratio generally is greater than 2.In the practical application of projection lens, when projection distance is 1 meter, projected image is less than 50 inches, can not meet well the requirement at the larger image of less space projection.
Although now have the projection lens projects ratio of indivedual models to be less than 1, due to contrast and sharpness poor, aberration is large or have vision (TV) distortion, a demand of satisfying the market well.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of high-resolution wide-angle projection lens and projector, can realize correcting chromatic aberration, improve contrast and homogeneity.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of high-resolution wide-angle projection lens is provided, its focal length projection ratio is less than 0.6, and comprises: the first lens group set gradually along first direction, the second lens combination, diaphragm and the 3rd lens combination; The second lens combination comprises the 3rd convex-concave negative lens, the first biconvex positive lens and the second biconvex positive lens set gradually along first direction; The second lens combination focal length is F2, and F2 is between 30 millimeters and 40 millimeters; The 3rd convex-concave negative lens focal length is F2-1, and F2-1 is between 75 millimeters and 85 millimeters; The first biconvex positive lens focal length is F2-2, and F2-2 is between 75 millimeters and 85 millimeters; The second biconvex positive lens focal length is F2-3, and F2-3 is between 60 millimeters and 80 millimeters, and the refractive index of the 3rd convex-concave negative lens material is n2-1, and n2-1 is between 1.8 and 1.85; The refractive index of the first biconvex positive lens material is n2-2, and n2-2 is between 1.75 and 1.81; The refractive index of the second biconvex positive lens material is n2-3, and n2-3 is between 1.6 and 1.66, and the 3rd convex-concave negative lens and the first biconvex positive lens are for gummed or twoly separate combination.
Wherein, camera lens comprises and take first direction as the prism combination with reference to being arranged at the 3rd lens combination front.
Wherein, the first lens group comprises the first convex-concave negative lens, convex-concave aspheric mirror and the second convex-concave negative lens set gradually along first direction, or the first convex-concave negative lens, convex-concave aspheric mirror and the first double-concave negative lens that along first direction, set gradually.
Wherein, first lens group focal length is F1, and F1 is between-13 millimeters and-12 millimeters; The first convex-concave negative lens focal length is F1-1, and F1-1 is between-120 millimeters and-110 millimeters; Convex-concave aspheric mirror focal length is F1-2, and F1-2 is between-55 millimeters and-45 millimeters; The second convex-concave negative lens or the first double-concave negative lens focal length are F1-3, and F1-3 is between-40 millimeters and-30 millimeters, and the material of convex-concave aspheric mirror is organic glass, and the refractive index of the first convex-concave negative lens material is n1-1, and 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, and n1-3 is between 1.6 and 1.7.
Wherein, the 3rd lens combination comprises the 3rd biconvex positive lens, the 4th concavo-convex negative lens, the second double-concave negative lens, the 4th biconvex positive lens, the 5th biconvex positive lens, the 6th biconvex positive lens and the 7th biconvex positive lens set gradually along first direction, or the 3rd biconvex positive lens set gradually along first direction, the 4th concavo-convex negative lens, the second double-concave negative lens, the 4th biconvex positive lens, the 5th concavo-convex positive lens, the 6th biconvex positive lens and the 7th biconvex positive lens.
Wherein, the 3rd lens combination focal length is F3, and F3 is between 40 millimeters and 50 millimeters; The 3rd biconvex positive lens focal length is F3-1, and F3-1 is between-300 millimeters and-200 millimeters; The 4th concavo-convex negative lens focal length is F3-2, and F3-2 is between-300 millimeters and-200 millimeters; The second double-concave negative lens focal length is F3-3, and F3-3 is between-100 millimeters and-80 millimeters; The 4th biconvex positive lens focal length is F3-4, and F3-4 is between-100 millimeters and-80 millimeters; The 5th biconvex positive lens or the 5th concavo-convex positive lens focal length are F3-5, and F3-5 is between 140 millimeters and 160 millimeters; The 6th biconvex positive lens focal length is F3-6, and F3-6 is between 85 millimeters and 110 millimeters; The 7th biconvex positive lens focal length is F3-7, and F3-7 is between 35 millimeters and 45 millimeters, and the refractive index of the 3rd biconvex positive lens material is n3-1, and n3-1 is between 1.48 and-1.52; The refractive index of the 4th concavo-convex negative lens material is n3-2, and n3-2 is between 1.8 and 1.85; The refractive index of the second double-concave negative lens material is n3-3, and n3-3 is between 1.8 and 1.85; The refractive index of the 4th biconvex positive lens material is n3-4, and n3-4 is between 1.48 and 1.52; The refractive index of the 5th biconvex positive lens or the 5th concavo-convex positive lens material is n3-5, and n3-5 is between 1.48 and 1.52; The refractive index of the 6th biconvex positive lens material is n3-6, and n3-6 is between 1.48 and 1.52; The refractive index of the 7th biconvex positive lens material is n3-7, and n3-7 is between 1.8 and 1.85, and the 3rd biconvex positive lens, the 4th concavo-convex negative lens, the second double-concave negative lens and the 4th biconvex positive lens are the gummed combination.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of high resolution wide-angle projector is provided, comprise the high-resolution wide-angle projection lens that is projected chip and above-mentioned any one, take first direction as reference, be projected chip and be arranged at the 3rd lens combination front.
Wherein, projector comprises in the 3rd lens combination and is projected the prism combination between chip.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention carries out respectively chromatic aberration correction by first lens group, the second lens combination and the 3rd lens combination, can realize proofreading and correct better the aberration of projection lens.And, utilize diaphragm and the 3rd lens combination can realize resembling the Fang Yuanxin design, can improve contrast and the homogeneity of projection lens.The present invention compared with prior art, can proofread and correct the aberration of projection lens, improves contrast and the homogeneity of projection lens, has met the market demand of projection lens.
The accompanying drawing explanation
Fig. 1 is the structural representation of high-resolution wide-angle projection lens one embodiment of the present invention;
Fig. 2 is the structural representation of high resolution wide-angle projector of the present invention one embodiment;
Fig. 3 is the light path track schematic diagram of high resolution wide-angle projector of the present invention one embodiment.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Consult Fig. 1, high resolution proj ector one embodiment of the present invention comprises: the first lens group 11, the second lens combination 12, diaphragm 13 and the 3rd lens combination 14 that along first direction, set gradually.First lens group 11, the second lens combination 12 and the 3rd lens combination 14 are spaced, and diaphragm 13 is between the second lens combination 12 and the 3rd lens combination 14.
In real process, can move forward and backward first lens group 11 and realize focusing along first direction, also can, along first direction, move forward and backward the second lens combination 12 and realize focusing.
Wherein, diaphragm 13 is set and can realizes the telecentric beam path design of the side of elephant, also can improve contrast and homogeneity.In addition, first lens group 11, the second lens combination 12 and the 3rd lens combination 14 can be carried out respectively chromatic aberration correction.
Camera lens comprises take first direction as the prism combination 15 with reference to being arranged at the 3rd lens combination front, and prism combination 15 can be thermal infrared spectrum prism (TIR), polarization splitting prism (PBS) or polygon prism (X prism).
Take first direction as reference, be projected chip 16 and be arranged at the 3rd lens combination 14 fronts, being projected chip 16 can be digital light processing display (DLP), Liquiid crystal on silicon (lcos) display (LCOS) or liquid crystal display (LCD).Can select different prism combinations 15 or cancel prism combination 15 according to different illuminators and the different chips that is projected.
According to the difference of illuminator, when being projected chip 16 for the digital light processing display, the thermal infrared spectrum prism is selected in prism combination 15; When being projected chip 16 for Liquiid crystal on silicon (lcos) display, polarization splitting prism is selected in prism combination 15; When being projected chip 16 for liquid crystal display, polygon prism is selected in prism combination 15.According to different illumination application, also can select to cancel prism combination 15 in addition.
Consult Fig. 2, first lens group 11 sets gradually the first convex-concave negative lens 21, convex-concave aspheric mirror 22, the first double-concave negative lens 23 along first direction.The first convex-concave negative lens 21, convex-concave aspheric mirror 22, the first double-concave negative lens 23 are the negativity lens.The first double-concave negative lens 23 can be replaced by the second convex-concave negative lens.The material of convex-concave aspheric mirror 22 is organic glass.Can realize the purpose of focusing by moving forward and backward first lens group 11.
Convex-concave aspheric mirror 22 can be proofreaied and correct the TV distortion; In addition, first lens group 11 can realize correcting chromatic aberration by the first convex-concave negative lens 21, convex-concave aspheric mirror 22, the first double-concave negative lens 23 that set gradually along first direction.
The second lens combination 12 sets gradually the 3rd convex-concave negative lens 31, the first biconvex positive lens 32 and the second biconvex positive lens 33 along first direction.The 3rd convex-concave negative lens 31 and the first biconvex positive lens 32 can also can separate combination for two for the gummed combination.The 3rd convex-concave negative lens 31, the first biconvex positive lens 32 and the second biconvex positive lens 33 are the positivity lens.Wherein, move forward and backward the purpose that the second lens combination 12 can realize interior focusing.
The second lens combination 12 can realize chromatic aberration correction by set gradually the 3rd convex-concave negative lens 31, the first biconvex positive lens 32 and the second biconvex positive lens 33 along first direction.
The second lens combination 12 focal lengths are F2, and F2 is between 30 millimeters and 40 millimeters; The 3rd convex-concave negative lens 31 focal lengths are F2-1, and F2-1 is between 75 millimeters and 85 millimeters; The first biconvex positive lens 32 focal lengths are F2-2, and F2-2 is between 75 millimeters and 85 millimeters; The second biconvex positive lens 33 focal lengths are F2-3, and F2-3 is between 60 millimeters and 80 millimeters, and the refractive index of the 3rd convex-concave negative lens 31 materials is n2-1, and n2-1 is between 1.8 and 1.85; The refractive index of the first biconvex positive lens 32 materials is n2-2, and n2-2 is between 1.75 and 1.81; The refractive index of the second biconvex positive lens 33 materials is n2-3, and n2-3 is between 1.6 and 1.66, and the 3rd convex-concave negative lens 31 and the first biconvex positive lens 21 are for gummed or twoly separate combination.
The 3rd lens combination 14 sets gradually the concavo-convex negative lens 42 of the 3rd biconvex positive lens the 41, the 4th, the second double-concave negative lens 43, the concavo-convex positive lens 45 of the 4th biconvex positive lens the 44, the 5th, the 6th biconvex positive lens 46 and the 7th biconvex positive lens 47 along first direction.The described the 5th concavo-convex positive lens 45 can be replaced by the 5th biconvex positive lens; Described the 3rd biconvex positive lens 41, the described the 4th concavo-convex negative lens 42, described the second double-concave negative lens 43 and the 4th biconvex positive lens 44 are the negativity lens and are the gummed combination; The 5th concavo-convex positive lens 45, the six biconvex positive lens 46, the seven biconvex positive lenss 47 are the positivity lens.
The 3rd lens combination 14 can correcting chromatic aberration, and the 3rd lens combination 14 forms and resembles the Fang Yuanxin design with diaphragm 13, can improve contrast and homogeneity.
The 3rd lens combination 14 focal lengths are F3, and F3 is between 40 millimeters and 50 millimeters; The 3rd biconvex positive lens 41 focal lengths are F3-1, and F3-1 is between-300 millimeters and-200 millimeters; The 4th concavo-convex negative lens 42 focal lengths are F3-2, and F3-2 is between-300 millimeters and-200 millimeters; The second double-concave negative lens 43 focal lengths are F3-3, and F3-3 is between-100 millimeters and-80 millimeters; The 4th biconvex positive lens 44 focal lengths are F3-4, and F3-4 is between-100 millimeters and-80 millimeters; The 5th concavo-convex positive lens 45 focal lengths are F3-5, and F3-5 is between 140 millimeters and 160 millimeters; The 6th biconvex positive lens 46 focal lengths are F3-6, and F3-6 is between 85 millimeters and 110 millimeters; The 7th biconvex positive lens 47 focal lengths are F3-7, and F3-7 is between 35 millimeters and 45 millimeters, and the refractive index of the 3rd biconvex positive lens 41 materials is n3-1, and n3-1 is between 1.48 and-1.52; The refractive index of the 4th concavo-convex negative lens 42 materials is n3-2, and n3-2 is between 1.8 and 1.85; The refractive index of the second double-concave negative lens 43 materials is n3-3, and n3-3 is between 1.8 and 1.85; The refractive index of the 4th biconvex positive lens 44 materials is n3-4, and n3-4 is between 1.48 and 1.52; The refractive index of the 5th concavo-convex positive lens 45 materials is n3-5, and n3-5 is between 1.48 and 1.52; The refractive index of the 6th biconvex positive lens 46 materials is n3-6, and n3-6 is between 1.48 and 1.52; The refractive index of the 7th biconvex positive lens 47 materials is n3-7, and n3-7 is between 1.8 and 1.85.
According to the setting to inner each lens parameter of first lens group, first lens group and the 3rd lens combination, can realize increasing the field angle of camera lens, reduce the purpose of projection ratio, meet preferably the requirement at the larger image of less space projection.
The 0.65 inch dmd chip of below take is example, provides the parameter of the optical system embodiment of the present invention's one high resolving power wide angle projection lens.The parameter of projection lens is as follows:
S4 aspheric surface parameter:
S5 aspheric surface parameter:
Consult Fig. 3, the light path track schematic diagram of high resolution wide-angle projector of the present invention one embodiment.From figure, we can find out that light 51, light 52 and light 53 arranged before entering projector from top to bottom, and light 51, light 52 and light 53 are arranged from bottom to top after leaving projector, and the outgoing image is inverted with respect to incident image.Light 51, light 52 and light 53 are in the process by first lens group, the second lens combination and the 3rd lens combination successively, and along first direction, the aberration of light is constantly better proofreaied and correct.The Fang Yuanxin that resembles formed by diaphragm and the 3rd lens combination designs, and contrast and the homogeneity of light 51, light 52 and light 53 are improved.According to the setting to inner each lens parameter of first lens group, the second lens combination and the 3rd lens combination, can increase the field angle of projector, reduce the projection ratio.
The technique effect that specific embodiment can reach is: field angle is 105 degree, and the projection ratio is 0.6, and focal length F is 8.7mm.When projection distance is one meter, projects images is 80 inches.
Be different from the situation of prior art, the present invention carries out respectively chromatic aberration correction by described first lens group, described the second lens combination and described the 3rd lens combination, can realize proofreading and correct better the aberration of described projection lens.And, utilize diaphragm and described the 3rd lens combination can realize resembling the Fang Yuanxin design, can improve contrast and the homogeneity of described projection lens.The present invention compared with prior art, can proofread and correct the aberration of described projection lens, improves contrast and the homogeneity of described projection lens, has met the market demand of described projection lens.
These are only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (8)
1. a high-resolution wide-angle projection lens, is characterized in that, its focal length projection ratio is less than 0.6, and comprises:
The first lens group set gradually along first direction, the second lens combination, diaphragm and the 3rd lens combination;
Described the second lens combination comprises the 3rd convex-concave negative lens, the first biconvex positive lens and the second biconvex positive lens set gradually along first direction;
Described the second lens combination focal length is F2, and F2 is between 30 millimeters and 40 millimeters; Described the 3rd convex-concave negative lens focal length is F2-1, and F2-1 is between 75 millimeters and 85 millimeters; Described the first biconvex positive lens focal length is F2-2, and F2-2 is between 75 millimeters and 85 millimeters; Described the second biconvex positive lens focal length is F2-3, and F2-3 is between 60 millimeters and 80 millimeters, and the refractive index of described the 3rd convex-concave negative lens material is n2-1, and n2-1 is between 1.8 and 1.85; The refractive index of described the first biconvex positive lens material is n2-2, and n2-2 is between 1.75 and 1.81; The refractive index of described the second biconvex positive lens material is n2-3, and n2-3 is between 1.6 and 1.66, and described the 3rd convex-concave negative lens and described the first biconvex positive lens are for gummed or twoly separate combination.
2. high-resolution wide-angle projection lens according to claim 1 is characterized in that:
Described camera lens comprises take first direction as the prism combination with reference to being arranged at the 3rd lens combination front.
3. high-resolution wide-angle projection lens according to claim 1 is characterized in that:
Described first lens group comprises the first convex-concave negative lens, convex-concave aspheric mirror and the second convex-concave negative lens set gradually along first direction, or the first convex-concave negative lens, convex-concave aspheric mirror and the first double-concave negative lens that along first direction, set gradually.
4. high-resolution wide-angle projection lens according to claim 3 is characterized in that:
Described first lens group focal length is F1, and F1 is between-13 millimeters and-12 millimeters; Described the first convex-concave negative lens focal length is F1-1, and F1-1 is between-120 millimeters and-110 millimeters; Described convex-concave aspheric mirror focal length is F1-2, and F1-2 is between-55 millimeters and-45 millimeters; Described the second convex-concave negative lens or the first double-concave negative lens focal length are F1-3, F1-3 is between-40 millimeters and-30 millimeters, the material of described convex-concave aspheric mirror is organic glass, and the refractive index of described the first convex-concave negative lens material is n1-1, and n1-1 is between 1.48 and 1.62; The refractive index of described the second convex-concave negative lens or the first double-concave negative lens material is n1-3, and n1-3 is between 1.6 and 1.7.
5. high-resolution wide-angle projection lens according to claim 1 is characterized in that:
Described the 3rd lens combination comprises the 3rd biconvex positive lens, the 4th concavo-convex negative lens, the second double-concave negative lens, the 4th biconvex positive lens, the 5th biconvex positive lens, the 6th biconvex positive lens and the 7th biconvex positive lens set gradually along first direction, or the 3rd biconvex positive lens set gradually along first direction, the 4th concavo-convex negative lens, the second double-concave negative lens, the 4th biconvex positive lens, the 5th concavo-convex positive lens, the 6th biconvex positive lens and the 7th biconvex positive lens.
6. high-resolution wide-angle projection lens according to claim 5 is characterized in that:
Described the 3rd lens combination focal length is F3, and F3 is between 40 millimeters and 50 millimeters; Described the 3rd biconvex positive lens focal length is F3-1, and F3-1 is between-300 millimeters and-200 millimeters; The described the 4th concavo-convex negative lens focal length is F3-2, and F3-2 is between-300 millimeters and-200 millimeters; Described the second double-concave negative lens focal length is F3-3, and F3-3 is between-100 millimeters and-80 millimeters; Described the 4th biconvex positive lens focal length is F3-4, and F3-4 is between-100 millimeters and-80 millimeters; Described the 5th biconvex positive lens or the 5th concavo-convex positive lens focal length are F3-5, and F3-5 is between 140 millimeters and 160 millimeters; Described the 6th biconvex positive lens focal length is F3-6, and F3-6 is between 85 millimeters and 110 millimeters; Described the 7th biconvex positive lens focal length is F3-7, and F3-7 is between 35 millimeters and 45 millimeters, and the refractive index of described the 3rd biconvex positive lens material is n3-1, and n3-1 is between 1.48 and-1.52; The refractive index of described the 4th concavo-convex negative lens material is n3-2, and n3-2 is between 1.8 and 1.85; The refractive index of described the second double-concave negative lens material is n3-3, and n3-3 is between 1.8 and 1.85; The refractive index of described the 4th biconvex positive lens material is n3-4, and n3-4 is between 1.48 and 1.52; The refractive index of described the 5th biconvex positive lens or the 5th concavo-convex positive lens material is n3-5, and n3-5 is between 1.48 and 1.52; The refractive index of described the 6th biconvex positive lens material is n3-6, and n3-6 is between 1.48 and 1.52; The refractive index of described the 7th biconvex positive lens material is n3-7, and n3-7 is between 1.8 and 1.85, and described the 3rd biconvex positive lens, described the 4th concavo-convex negative lens, described the second double-concave negative lens and described the 4th biconvex positive lens are the gummed combination.
7. a high resolution wide-angle projector, is characterized in that, comprises and be projected chip and high-resolution wide-angle projection lens as described as any one in claim 1,3～6, take first direction as reference, and the described chip that is projected is arranged at the 3rd lens combination front.
8. high resolution wide-angle projector according to claim 7, is characterized in that, described projector comprises: in the 3rd lens combination be projected the combination of prism between chip.
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| CN201310378928.9A CN103439783B (en) | 2011-11-15 | 2011-11-15 | A kind of high-resolution wide-angle projection lens and projecting apparatus |
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| CN 201110361675 CN102590985B (en) | 2011-11-15 | 2011-11-15 | High-resolution wide-angle projection lens and projector |
| CN201310378928.9A CN103439783B (en) | 2011-11-15 | 2011-11-15 | A kind of high-resolution wide-angle projection lens and projecting apparatus |
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| CN 201110361675 Division CN102590985B (en) | 2011-11-15 | 2011-11-15 | High-resolution wide-angle projection lens and projector |
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| CN114460716A (en) * | 2022-01-11 | 2022-05-10 | 上海大学 | Fisheye lens comprising two aspherical lenses |
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| CN103439783B (en) | 2017-09-12 |
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Address after: 518000 Shenzhen, Nanshan District, China Hi Tech in the world, the world's 806 digital building, room three Applicant after: SHENZHEN ESTAR DISPLAYTECH CO., LTD. Address before: 518000, District, Shenzhen, Nanshan District high tech Zone, Southern District, B1 digital technology park, building 2, C Applicant before: Shenzhen Esta Display Technology Co., Ltd. |
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