CN202383349U - High-resolution wide angle projection lens and projector - Google Patents
High-resolution wide angle projection lens and projector Download PDFInfo
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- CN202383349U CN202383349U CN 201120452118 CN201120452118U CN202383349U CN 202383349 U CN202383349 U CN 202383349U CN 201120452118 CN201120452118 CN 201120452118 CN 201120452118 U CN201120452118 U CN 201120452118U CN 202383349 U CN202383349 U CN 202383349U
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Abstract
The utility model discloses a high-resolution wide angle projection lens and a projector, wherein the focal distance projection ratio of the projection lens is lower than 0.6, and the projection lens comprises a first lens set, a second lens set, a diaphragm and a third lens set which are orderly arranged along a first direction. Simultaneously, the utility model relates to a high-resolution wide angle projector, comprising a projected chip and a high-resolution wide angle projection lens, wherein the projected chip is arranged in front of the third lens set using the first direction as a reference. Through above structure, the color difference of the projection lens and the projector can be corrected, and the contrast and the uniformity can be increased.
Description
Technical field
The utility model relates to optical technical field, particularly relates to high resolving power wide angle projection lens and projector.
Background technology
The focal length of the projection lens that generally uses at present is bigger, and field angle is less, and field angle is generally less than 60 degree, so projection ratio (Throw Ratio) is bigger, and the projection ratio is generally greater than 2.In the practical application of projection lens, when projection distance was 1 meter, projects images can not satisfy the requirement at the big image of less space projection well less than 50 inches.
Though the projection lens projects ratio that now indivedual models is arranged is less than 1, because contrast and sharpness are relatively poor, aberration is big or have vision (TV) distortion, can not satisfy the demand in market well.
The utility model content
The technical matters that the utility model mainly solves provides a kind of high resolving power 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 utility model adopts is: a kind of high resolving power wide angle projection lens is provided; Its focal length projection ratio is less than 0.6, and comprises: first lens combination, second lens combination, diaphragm and the 3rd lens combination that set gradually along first direction.
Wherein, camera lens comprises with the first direction being the prism combination with reference to being arranged at the 3rd lens combination front.
Wherein, first lens combination comprises the first convex-concave negative lens, convex-concave aspheric mirror and the second convex-concave negative lens that sets gradually along first direction, or the first convex-concave negative lens, convex-concave aspheric mirror and first double-concave negative lens that set gradually along first direction.
Wherein, the first lens combination 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 an 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, second lens combination comprises the 3rd convex-concave negative lens, the first biconvex positive lens and the second biconvex positive lens that sets gradually along first direction.
Wherein, 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 separate combination for gummed or two.
Wherein, The 3rd lens combination comprises the 3rd biconvex positive lens, the 4th concavo-convex negative lens, 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 that sets gradually along first direction, or the 3rd biconvex positive lens, the 4th concavo-convex negative lens, 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 that set gradually along first direction.
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, 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 scheme that the utility model adopts is: a kind of high resolving power wide-angle projector is provided; Comprise by the projection chip and the high resolving power wide angle projection lens, be reference with the first direction, be arranged at the 3rd lens combination front by the projection chip.
Wherein, projector comprises in the 3rd lens combination with by the prism between the projection chip and making up.
The beneficial effect of the utility model is: be different from the situation of prior art, the utility model carries out chromatic aberration correction respectively through first lens combination, 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 design as Fang Yuanxin, can improve the contrast and the homogeneity of projection lens.The utility model compared with prior art can be proofreaied and correct the aberration of projection lens, improves the contrast and the homogeneity of projection lens, has satisfied the market demand of projection lens.
Description of drawings
Fig. 1 is the structural representation of the utility model high resolving power wide angle projection lens one embodiment;
Fig. 2 is the structural representation of the utility model high resolving power wide-angle projector one embodiment;
Fig. 3 is the light path track synoptic diagram of the utility model high resolving power wide-angle projector one embodiment.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.
Consult Fig. 1, the utility model high resolution proj ector one embodiment comprises: first lens combination 11 that sets gradually along first direction, second lens combination 12, diaphragm 13 and the 3rd lens combination 14.First lens combination 11, second lens combination 12 and the 3rd lens combination 14 are provided with at interval, and diaphragm 13 is between second lens combination 12 and the 3rd lens combination 14.
In real process, can move forward and backward first lens combination 11 and realize focusing along first direction, also can move forward and backward second lens combination 12 and realize focusing along first direction.
Wherein, diaphragm 13 is set realizes the telecentric beam path in image space design, also can improve contrast and homogeneity.In addition, first lens combination 11, second lens combination 12 and the 3rd lens combination 14 can be carried out chromatic aberration correction respectively.
Camera lens comprises with the first direction being 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).
With the first direction is reference, is arranged at the 3rd lens combination 14 fronts by projection chip 16, can be digital light processing display (DLP), Liquiid crystal on silicon (lcos) display (LCOS) or LCD (LCD) by projection chip 16.According to different illuminators and different can being selected different prism combinations 15 by the projection chip or cancel prism combination 15.
According to the difference of illuminator, when being the digital light processing display by projection chip 16, the thermal infrared spectrum prism is selected in prism combination 15; When being Liquiid crystal on silicon (lcos) display by projection chip 16, polarization splitting prism is selected in prism combination 15; When being LCD by projection chip 16, 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 combination 11 sets gradually the first convex-concave negative lens 21, convex-concave aspheric mirror 22, first double-concave negative lens 23 along first direction.The first convex-concave negative lens 21, convex-concave aspheric mirror 22, first double-concave negative lens 23 are the negativity lens.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 an organic glass.Can realize the purpose of focusing through moving forward and backward first lens combination 11.
Convex-concave aspheric mirror 22 can be proofreaied and correct the TV distortion; In addition, first lens combination 11 can realize correcting chromatic aberration through the first convex-concave negative lens 21, convex-concave aspheric mirror 22, first double-concave negative lens 23 that set gradually along first direction.
First lens combination, 11 focal lengths are F1, and F1 is between-13 millimeters and-12 millimeters; The first convex-concave negative lens, 21 focal lengths are F1-1, and F1-1 is between-120 millimeters and-110 millimeters; Convex-concave aspheric mirror 22 focal lengths are F1-2, and F1-2 is between-55 millimeters and-45 millimeters; First double-concave negative lens, 23 focal lengths are F1-3, and F1-3 is between-40 millimeters and-30 millimeters, and the refractive index of the first convex-concave negative lens, 21 materials is n1-1, and n1-1 is between 1.48 and 1.62; The refractive index of first double-concave negative lens, 23 materials is n1-3, and n1-3 is between 1.6 and 1.7.
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 second lens combination 12 can realize interior focusing.
Second lens combination 12 can realize chromatic aberration correction through 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.
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 separate combination for gummed or two.
The 3rd lens combination 14 sets gradually the concavo-convex positive lens of the concavo-convex negative lens of the 3rd biconvex positive lens the 41, the 4th 42, second double-concave negative lens 43, the 4th biconvex positive lens the 44, the 5th 45, the 6th biconvex positive lens 46 and the 7th biconvex positive lens 47 along first direction.The said the 5th concavo-convex positive lens 45 can be replaced by the 5th biconvex positive lens; The concavo-convex negative lens of said the 3rd biconvex positive lens the 41, the said the 4th 42, said 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 lenss 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 and the heart design far away of 13 groups of imaging sides of diaphragm 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; 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 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 setting to inner each lens parameter of first lens combination, first lens combination and the 3rd lens combination, can realize increasing the field angle of camera lens, reduce the purpose of projection ratio, satisfy requirement preferably at the big image of less space projection.
Be example with 0.65 inch dmd chip below, provide the parameter of the optical system embodiment of the utility model one high resolving power wide angle projection lens.The parameter of projection lens is following:
S4 aspheric surface parameter:
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) 5.526000e-014
12th?Order?Coefficient?(E) -5.409204e-017
14th?Order?Coefficient?(F) 2.0408474e-020
S5 aspheric surface parameter:
Conic?Constant?(K) -1.767484
4th?Order?Coefficient?(A) 4.495645e-005
6th?Order?Coefficient?(B) 1.751875e-008
8th?Order?Coefficient?(C) -1.448446e-010
10th?Order?Coefficient?(D) -3.892293e-014
12th?Order?Coefficient?(E) 8.180335e-016
14th?Order?Coefficient?(F) -9.183994e-019
Consult Fig. 3, the light path track synoptic diagram of the utility model high resolving power wide-angle projector one embodiment.We can find out that light 51, light 52 and light 53 arranged from top to bottom before getting into projector from figure, and light 51, light 52 and light 53 are arranged after leaving projector from bottom to top, and the outgoing image is inverted with respect to incident image.Through in the process of first lens combination, second lens combination and the 3rd lens combination, along first direction, the aberration of light is constantly better proofreaied and correct successively for light 51, light 52 and light 53.Through the picture Fang Yuanxin design that diaphragm and the 3rd lens combination form, the contrast and the homogeneity of light 51, light 52 and light 53 are improved.According to setting to inner each lens parameter of first lens combination, 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 was one meter, projects images was 80 inches.
Be different from the situation of prior art, the utility model carries out chromatic aberration correction respectively through said first lens combination, said second lens combination and said the 3rd lens combination, can realize proofreading and correct better the aberration of said projection lens.And, utilize diaphragm and said the 3rd lens combination can realize design as Fang Yuanxin, can improve the contrast and the homogeneity of said projection lens.The utility model compared with prior art can be proofreaied and correct the aberration of said projection lens, improves the contrast and the homogeneity of said projection lens, has satisfied the market demand of said projection lens.
More than be merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (10)
1. a high resolving power wide angle projection lens is characterized in that, its focal length throws ratio less than 0.6, and comprises:
First lens combination, second lens combination, diaphragm and the 3rd lens combination that set gradually along first direction.
2. high resolving power wide angle projection lens according to claim 1 is characterized in that:
Said camera lens comprises with the first direction being the prism combination with reference to being arranged at the 3rd lens combination front.
3. high resolving power wide angle projection lens according to claim 1 is characterized in that:
Said first lens combination comprises the first convex-concave negative lens, convex-concave aspheric mirror and the second convex-concave negative lens that sets gradually along first direction, or the first convex-concave negative lens, convex-concave aspheric mirror and first double-concave negative lens that set gradually along first direction.
4. high resolving power wide angle projection lens according to claim 3 is characterized in that:
The said first lens combination focal length is F1, and F1 is between-13 millimeters and-12 millimeters; The said first convex-concave negative lens focal length is F1-1, and F1-1 is between-120 millimeters and-110 millimeters; Said convex-concave aspheric mirror focal length is F1-2, and F1-2 is between-55 millimeters and-45 millimeters; The said 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 said convex-concave aspheric mirror is an organic glass, and the refractive index of the said first convex-concave negative lens material is n1-1, and n1-1 is between 1.48 and 1.62; The refractive index of the said 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 resolving power wide angle projection lens according to claim 1 is characterized in that:
Said second lens combination comprises the 3rd convex-concave negative lens, the first biconvex positive lens and the second biconvex positive lens that sets gradually along first direction.
6. high resolving power wide angle projection lens according to claim 5 is characterized in that:
The said second lens combination focal length is F2, and F2 is between 30 millimeters and 40 millimeters; Said the 3rd convex-concave negative lens focal length is F2-1, and F2-1 is between 75 millimeters and 85 millimeters; The said first biconvex positive lens focal length is F2-2, and F2-2 is between 75 millimeters and 85 millimeters; The said second biconvex positive lens focal length is F2-3, and F2-3 is between 60 millimeters and 80 millimeters, and the refractive index of said 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 said first biconvex positive lens material is n2-2, and n2-2 is between 1.75 and 1.81; The refractive index of the said second biconvex positive lens material is n2-3, and n2-3 is between 1.6 and 1.66, and said the 3rd convex-concave negative lens and the said first biconvex positive lens separate combination for gummed or two.
7. high resolving power wide angle projection lens according to claim 1 is characterized in that:
Said the 3rd lens combination comprises the 3rd biconvex positive lens, the 4th concavo-convex negative lens, 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 that sets gradually along first direction, or the 3rd biconvex positive lens, the 4th concavo-convex negative lens, 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 that set gradually along first direction.
8. high resolving power wide angle projection lens according to claim 7 is characterized in that:
Said the 3rd lens combination focal length is F3, and F3 is between 40 millimeters and 50 millimeters; Said the 3rd biconvex positive lens focal length is F3-1, and F3-1 is between-300 millimeters and-200 millimeters; The said the 4th concavo-convex negative lens focal length is F3-2, and F3-2 is between-300 millimeters and-200 millimeters; The said second double-concave negative lens focal length is F3-3, and F3-3 is between-100 millimeters and-80 millimeters; Said the 4th biconvex positive lens focal length is F3-4, and F3-4 is between-100 millimeters and-80 millimeters; Said 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; Said the 6th biconvex positive lens focal length is F3-6, and F3-6 is between 85 millimeters and 110 millimeters; Said 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 said the 3rd biconvex positive lens material is n3-1, and n3-1 is between 1.48 and-1.52; The refractive index of the said 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 said second double-concave negative lens material is n3-3, and n3-3 is between 1.8 and 1.85; The refractive index of said the 4th biconvex positive lens material is n3-4, and n3-4 is between 1.48 and 1.52; The refractive index of said 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 said the 6th biconvex positive lens material is n3-6, and n3-6 is between 1.48 and 1.52; The refractive index of said the 7th biconvex positive lens material is n3-7, and n3-7 is between 1.8 and 1.85, and said the 3rd biconvex positive lens, the said the 4th concavo-convex negative lens, said second double-concave negative lens and said the 4th biconvex positive lens are the gummed combination.
9. a high resolving power wide-angle projector is characterized in that, comprise by the projection chip with like each described high resolving power wide angle projection lens in the claim 1,3～8, and be reference with the first direction, saidly be arranged at the 3rd lens combination front by the projection chip.
10. high resolving power wide-angle projector according to claim 9 is characterized in that said projector comprises: make up in the 3rd lens combination with by the prism between the projection chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120452118 CN202383349U (en) | 2011-11-15 | 2011-11-15 | High-resolution wide angle projection lens and projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120452118 CN202383349U (en) | 2011-11-15 | 2011-11-15 | High-resolution wide angle projection lens and projector |
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| CN202383349U true CN202383349U (en) | 2012-08-15 |
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| CN 201120452118 Expired - Fee Related CN202383349U (en) | 2011-11-15 | 2011-11-15 | High-resolution wide angle projection lens and projector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590985A (en) * | 2011-11-15 | 2012-07-18 | 深圳市亿思达显示科技有限公司 | High-resolution wide-angle projection lens and projector |
| CN103439783A (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 |
| 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 |
-
2011
- 2011-11-15 CN CN 201120452118 patent/CN202383349U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590985A (en) * | 2011-11-15 | 2012-07-18 | 深圳市亿思达显示科技有限公司 | High-resolution wide-angle projection lens and projector |
| CN102590985B (en) * | 2011-11-15 | 2013-11-06 | 深圳市亿思达显示科技有限公司 | High-resolution wide-angle projection lens and projector |
| CN103439783A (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 |
| 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 |
| CN103439783B (en) * | 2011-11-15 | 2017-09-12 | 深圳市亿思达科技集团有限公司 | A kind of high-resolution wide-angle projection lens and projecting apparatus |
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