CN101770066A - Projection lens and minisize projection optical engine using the projecting lens - Google Patents
Projection lens and minisize projection optical engine using the projecting lens Download PDFInfo
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- CN101770066A CN101770066A CN200810241681A CN200810241681A CN101770066A CN 101770066 A CN101770066 A CN 101770066A CN 200810241681 A CN200810241681 A CN 200810241681A CN 200810241681 A CN200810241681 A CN 200810241681A CN 101770066 A CN101770066 A CN 101770066A
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Abstract
The invention discloses a projection lens which comprising a front group of lenses, a back group of lenses and a diaphragm arranged between the front lens and the back lens. The front group of lenses includes a first lens, a second lens and a third lens which are sequentially arranged, and most refracting surfaces of which are bent towards the diaphragm, wherein, the second lens and the third lens form a front balsaming lens. The back group of lenses includes a fourth lens and a fifth lens sequentially arranged, wherein, the convex surface of the fourth lens is bent towards the diaphragm which is positioned at the front focus of the back group of lenses. The interval between the third lens curved surface top close to the diaphragm and the diaphragm is less than the interval between the fourth lens curved surface top close to the diaphragm and the diaphragm. In the invention, the projecting lens formed by few lenses has simple structure, small size and low cost and also has little stray light and aberration, short projection distance and long back focal length, meeting the demand for minisize. In addition, the invention also provides a minisize projection optical engine using the projection lens.
Description
Technical field
The present invention relates to projection lens and projection display technique, relate in particular to a kind of projection lens of telecentric beam path and use the micro projection optical engine of this projection lens.
Background technology
In recent years, shadow casting technique has been widely used in aspects such as electronic teaching, office, commercial affairs and advertisement recreational.In present optical projection system, no matter be to adopt LCD (Liquid CrystalDisplay, LCD), liquid crystal on silicon (Liguid Crystal on Silicon, LCOS) or digital light handle (Digital Light Procession, projection theory such as DLP), projection lens all is wherein indispensable important opticses: behind the light changing device of light through reflective or penetration, need through projection lens projects imaging to the screen.
Publication number in the Chinese invention patent ublic specification of application " CN1256429 " name is called " image space telecentric double-Gaussian optical system " and discloses a kind of image space telecentric double-Gaussian optical system as the camera lens object lens, be based on the double gauss structure, group lens and back group lens before constituting by eight lens.Wherein, preceding group of lens comprise that convex surface bends towards two positive meniscus lenss of object space and the negative gummed of the falcate mirror of being made up of positive lens and negative lens; Group lens in back comprise that convex surface bends towards the negative gummed of the falcate mirror of being made up of negative lens and positive lens of the side of elephant, just meniscus shaped lens and biconvex lens.Diaphragm is arranged on the focus place of back group lens, between preceding group of lens and back group lens.Yet, the optical system of this structure, complex structure, optical element is more, and cost is higher, and the whole optical system size is bigger, can't satisfy the microminiaturized demand of micro projection.
Summary of the invention
In view of this, must provide a kind of simple in structure, size is little, and cost is low, is applicable to the projection lens of micro projection.
In addition, also need provide a kind of simple in structure, image quality is higher, and size is little, little projecting optical engine that cost is low.
A kind of projection lens, group lens before comprising, lens are organized in the back, and are arranged at the diaphragm between preceding group lens and the back group lens.The group lens comprise that series arrangement, most of plane of refraction all bend towards first lens of described diaphragm, second lens and the 3rd lens before described.Wherein, gummed mirror before described second lens and the 3rd lens are formed.Described back group lens comprise tactic the 4th lens and the 5th lens.Wherein, the convex surface of the 4th lens bends towards described diaphragm.Described diaphragm is positioned at the focus place, the place ahead of described back group lens.Before described in the group lens the 3rd lens close on the curved surface summit of diaphragm and the curved surface summit of diaphragm and the interval between the diaphragm are closed on less than the 4th lens in the group lens of described back in the interval between the diaphragm.
A kind of micro projection optical engine comprises lighting device, imaging device and above-mentioned projection lens.Imaging device forms image by the irradiation of described lighting device.Projection lens is used for receiving and throwing the formed image of described imaging device.
The present invention forms projection lens by less lens numbers, and is simple in structure, and size is less, and cost is lower, has less veiling glare and aberration, short projection distance, and long back focal length satisfies microminiaturized demand, can be embedded on the micromodule equipment.And dispose the micro projection optical engine of this projection lens, the light beam direct irradiation imaging device that lighting device sends, image in the imaging device is zoomed into real image by projection lens, project projection screen, simple in structure, efficiency of light energy utilization height, image quality is higher, and size is little, and production cost is lower.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the structural representation of the projection lens of first embodiment of the invention;
Fig. 2 is the structural representation of the projection lens of second embodiment of the invention;
Fig. 3 a is the main TV structure synoptic diagram of the projection lens of third embodiment of the invention;
Fig. 3 b is the plan structure synoptic diagram of Fig. 3 a;
Fig. 4 is the structural representation of the micro projection optical engine of first embodiment of the invention;
Fig. 5 is the structural representation of the micro projection optical engine of second embodiment of the invention.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Figure 1 shows that the structural representation of the projection lens of first embodiment of the invention.This projection lens comprises preceding group lens 11 based on the double gauss structure, back group lens 21, and be arranged on the preceding diaphragm of organizing between lens 11 and the back group lens 21 31.Wherein, preceding group of lens 11 comprise that series arrangement, most of plane of refraction all bend towards first lens, 111, the second lens 112 and the 3rd lens 113 of diaphragm 31.Back group lens 21 comprise tactic the 4th lens 211 and the 5th lens 212.That is, projection lens mainly is made up of five lens: from the screen side (not shown) towards polarizing beam splitter 41 and little liquid crystal display 51 sides first lens 111, second lens 112, the 3rd lens 113, the 4th lens 211 and the 5th lens 212 are set in proper order.
In preceding group of lens 11, first lens 111 are positive lens, and its convex surface bends towards diaphragm 31.Gummed mirror before second lens 112 and the 3rd lens 113 are formed, its convex surface bends towards diaphragm 31, and gummed mirror is negative gummed mirror before this.In the embodiment of the present invention, first lens 111 are meniscus shaped lens or plano-convex lens, and second lens 112 are biconvex lens, and the 3rd lens 113 are biconcave lens.Secondly, second lens 112 and the 3rd lens 113 adopt different materials to form the gummed mirror, are used for aberration correction (achromatism).In addition, the combined focal length scope of preceding group of lens is 70mm～80mm, as: 70mm, 75mm or 80mm etc.And projection lens field angle of the present invention is ± 15 °, and focal range is 7mm～13mm, as: 7mm, 10mm or 13mm etc.Therefore, projection lens has long back focal length, and polarizing beam splitter 41 can be placed between projection lens and the little liquid crystal display 51.
In other embodiment of the present invention, second lens 112 and the 3rd lens 113 also can adopt the lens of other type to form the gummed mirror, are negative gummed mirror as long as satisfy the gummed mirror that is combined into.
In the group lens 21 of back, the 4th lens 211 are positive lens, and its convex surface bends towards diaphragm 31.The 5th lens 212 are positive lens.In the embodiment of the present invention, the 4th lens 211 are meniscus shaped lens, and the 5th lens 212 are biconvex lens.Because most of plane of refraction of lens all bends towards diaphragm 31 in preceding group of lens 11, therefore, it is starting point that projection lens forms with diaphragm 31, the convex surface of first lens 111, the convex surface of preceding gummed mirror, the convex surface of the 4th lens 211, the 5th lens 212 close on polarizing beam splitter 41 sides convex surface bend towards the structure of asymmetrical, the similar water ripple of diaphragm 31 respectively, the camera lens of this structure can weaken the reflection of light between minute surface, thereby reduces the interference of veiling glare, effectively improves image contrast.
In other embodiment of the present invention, the 4th lens 211 and the 5th lens 212 also can adopt the lens of other type, as long as satisfied the 4th lens 211 and the 5th lens 212 are positive lens.
Diaphragm 31 is positioned at the focus place, the place ahead of back group lens 21, and, before the 3rd lens 113 close on diaphragm 31 in the group lens 11 curved surface summit organize less than the back with the interval between the diaphragm 31 that the 4th lens 211 close on the curved surface summit of diaphragm 31 and the interval between the diaphragm 31 in the lens 21, then organize the average height of the average height of lens 21 greater than preceding group of lens 11; Adopt asymmetrical structure at interval, make projection lens form telecentric beam path at polarizing beam splitter 41 and little liquid crystal display 51 sides.In the embodiment of the present invention, the 4th lens 211 close on the curved surface summit of diaphragm 31 and the interval d1 scope between the diaphragm 31 is 4mm～5mm in the back group lens 21.That is, can suitably adjust the interval between the 4th lens 211 and the 5th lens 212 and the diaphragm 31,, improve the efficiency of light energy utilization to form telecentric beam path according to the size of little liquid crystal display 51.As a rule, the size of little liquid crystal display 51 is big more, and d1 is big more at interval: for undersized little liquid crystal display 51, move the 4th lens 211 and the 5th lens 212 to close on diaphragm 31 directions, the 4th lens 211 and the interval d1 of diaphragm 31 are reduced, for example be reduced to 4mm; For large-sized slightly little liquid crystal display 51, to move the 4th lens 211 and the 5th lens 212 away from diaphragm 31 directions, the 4th lens 211 and the interval d1 of diaphragm 31 are increased, for example increase to 4.5mm; For large-sized little liquid crystal display 51, continue to increase d1 at interval, for example increase to 5mm, certainly, in order to form telecentric beam path, make full use of luminous energy, also need according to the interval between the design adjustment lens of light path, for example, adjust the interval between the 4th lens 211 and the 5th lens 212, repeat no more here.
In the embodiment of the present invention, first lens 111, second lens 112, the 3rd lens 113, the 4th lens 211 and the 5th lens 212 are spherical lens, and its material is the crown glass or the flint glass of high index of refraction; Adopt the structure of spherical lens, make the processing technology of camera lens simple, cost of manufacture is lower.In the embodiment of the present invention, the refractive index of the crown glass that is adopted is about 1.65, and the refractive index of flint glass is about 1.78; Adopt the lens of high index of refraction material, reduce the senior aberration of camera lens.In addition, adopt the physical dimension of the projection lens that five lens form less, its scope is Φ 8.4mm * 12.5mm～23mm * 36mm, and wherein, Φ is the aperture of projection lens.That is, pore diameter range is 8.4mm～23mm, and length range is 12.5mm～36mm.In other words, the projection lens physical dimension minimum of present embodiment can reach Φ 8.4mm * 23mm, and full-size is Φ 12.5mm * 36mm only also, satisfies the demand of projection lens microminiaturization.
Therefore, embodiment of the present invention only adopts five lens, on the basis of double gauss structure, form projection lens, form telecentric beam path, have less veiling glare and aberration, long back focal length, short projection distance, and the optical element of use is less, processing technology is simple, cost of manufacture is lower, and physical dimension is little, satisfies the demand of projection.
Figure 2 shows that the structural representation of the projection lens of second embodiment of the invention.The structural similarity of this projection lens and projection lens shown in Figure 1 all is based on the double gauss structure, and the key distinction is that back group lens 22 also comprise six lens 223 and seven lens 224 of series arrangement between diaphragm 32 and the 4th lens 221.Simultaneously, the 4th lens 221 and the 5th lens 222 formation center symmetries; Adopt centrosymmetric structure, help compensating disappear mutually off-axis aberration, astigmatism, avoid producing filed curvature.Say in detail, group lens 12 before this projection lens comprises, lens 22 are organized in the back, and are arranged on the diaphragm 32 between preceding group lens 12 and the back group lens 22.Wherein, preceding group of lens 12 comprise that series arrangement, most of plane of refraction all bend towards first lens, 121, the second lens 122 and the 3rd lens 123 of diaphragm 32.Back group lens 22 comprise that series arrangement, most of plane of refraction all bend towards the 6th lens 223, the seven lens, 224, the four lens 221 and the 5th lens 222 of diaphragm 32.Promptly, projection lens mainly is made up of seven lens: from the screen side (not shown) towards polarizing beam splitter 42 and little liquid crystal display 52 sides first lens 121, second lens 122, the 3rd lens 123, the 6th lens 223 that are provided with in proper order, the 7th lens 224, the four lens 221 and the 5th lens 222.
In the embodiment of the present invention, first lens 121, second lens 122, the 3rd lens 123, the 4th lens 221, the 5th lens 222, the 6th lens 223 and the 7th lens 224 are spherical lens, and its material is the crown glass or the flint glass of high index of refraction; Adopt the structure of spherical lens, make the processing technology of camera lens simple, cost of manufacture is lower.In the embodiment of the present invention, the refractive index of the crown glass that is adopted is about 1.65, and the refractive index of flint glass is about 1.78; Adopt the lens of high index of refraction material, reduce the senior aberration of camera lens.Again, first lens 121 are meniscus shaped lens or plano-convex lens.Second lens 122 and the 3rd lens 123 are meniscus shaped lens, and the gummed mirror is used for aberration correction (achromatism) before the composition glued together.The 6th lens 223 are biconcave lens, and the 7th lens 224 are biconvex lens, and the 6th lens 223 and the 7th lens 224 are glued together, form most of plane of refraction all bend towards diaphragm 32 back gummed mirror, be used for aberration correction (achromatism).The 4th lens 221 are plano-convex lens, and the 5th lens 222 are and the 4th lens 221 centrosymmetric plano-convex lenss.
In the embodiment of the present invention, diaphragm 32 both sides are the gummed mirror, and, before the 3rd lens 123 close on diaphragm 32 in the group lens 12 curved surface summit organize less than the back equally with the interval between the diaphragm 32 that the 6th lens 223 close on the curved surface summit of diaphragm 32 and the interval between the diaphragm in the lens 22, then organize the average height of the average height of lens 22, so that projection lens forms telecentric beam path at polarizing beam splitter 42 and little liquid crystal display 52 sides greater than preceding group of lens 12.Wherein, to close on the curved surface summit and the interval d2 between the diaphragm 32 of diaphragm 32 be 3mm～5mm to the 6th lens 223.As a rule, the size of little liquid crystal display 52 is big more, and d2 is big more at interval: can be 3mm for the interval d2 between undersized little liquid crystal display 52, the six lens 223 and the diaphragm 32; For large-sized slightly little liquid crystal display 52, can increase the interval d2 between the 6th lens 223 and the diaphragm 32, for example d2 is 4mm at interval; For larger sized little liquid crystal display 52, can continue to increase d2 at interval, for example reach 5mm.Certainly, in order to form telecentric beam path, make full use of luminous energy, also need according to the interval between the design adjustment lens of light path, for example, adjust the interval between back gummed mirror, the 4th lens 221, the 5th lens 222, adapt to little liquid crystal display 52 of different size.
In other embodiment of the present invention, the lens type of first lens 121, second lens 122, the 3rd lens 123, the 4th lens 221, the 5th lens 222, the 6th lens 223 and the 7th lens 224 is not limited to the type in this embodiment, for example, the 4th lens 221 and the 5th lens 222 can also adopt biconvex lens etc., repeat no more here.
In the embodiment of the present invention, the field angle of projection lens is ± 15 °, and aperture-coefficient (F number) is 1.8～2, and focal range is 10mm～20mm, as: 10mm, 15mm or 20mm etc.And the combined focal length scope of preceding group of lens is 30mm～50mm, as: 30mm, 40mm or 50mm etc.Therefore, projection lens has long back focal length, and polarizing beam splitter can be placed between projection lens and the little liquid crystal display 52.In addition, the pore diameter range of projection lens is 6.8mm～30mm, and length range is 12.5mm～36mm, promptly, the projection lens physical dimension minimum that adopts seven lens to form can reach Φ 6.8mm * 12.5mm, and full-size is Φ 30mm * 36mm only also, satisfies the demand of projection lens microminiaturization.
Therefore, embodiment of the present invention adopts 7 lens to form the projection lens of double gauss structure, forms telecentric beam path, has less veiling glare and aberration, long back focal length, short projection distance has better been proofreaied and correct various aberrations, and size is little, cost is low, secondly, projection lens image quality height, its light field illuminance uniformity is good: screen edge and intermediate luminance are more than 90%; Resolution of lens reaches the resolution of lens of all minimum pixel requirements: amplitude transfer function MTF 〉=0.55; The spectral effects of camera lens is good, can truly reappear the color of object.In addition, projection lens adaptability is better: only need adjust the interval between each lens, just can adapt to little liquid crystal display of different size.
Fig. 3 a is depicted as the main TV structure synoptic diagram of the projection lens of third embodiment of the invention; Fig. 3 b is the plan structure synoptic diagram of Fig. 3 a.The structural similarity of this projection lens and projection lens shown in Figure 2, difference is, polishing respectively and are plane 2300 in the bottom of the 4th lens 231, the 5th lens 232 and top, is used for further reducing size, microminiaturized so that embed in the littler mobile device more easily to satisfy it.
Figure 4 shows that the structural representation of the micro projection optical engine of first embodiment of the invention.This micro projection optical engine comprises lighting device 1, by the irradiation of lighting device 1, the imaging device 2 of formation image, and is used to receive the also projection lens 3 of projection imaging device 2 formed images.Wherein, projection lens 3 is the projection lens of above-mentioned arbitrary embodiment.
In the embodiment of the present invention, lighting device 1 can be various types of light sources, is chosen as light emitting diode (light-emitting diode preferably, LED) or LASER Light Source, and lighting device 1 itself contains optically focused shaping device, does not do signal in detail in the accompanying drawings.
In other embodiment of the present invention, this polarizing beam splitter 44 also can be replaced by flat polarizing beam splitter.
Little liquid crystal display 54 is arranged at a non-adjacent side of polarizing beam splitter 44 and lighting device 1, be used for received polarized light is modulated, be converted to another polarized light vertical, and make this another polarized light carry image information, promptly form image with this polarized light.In the embodiment of the present invention, little liquid crystal display 54 is liquid crystal on silicon (LCOS) panel.When the polarized light that receives when little liquid crystal display 54 is the S polarized light, through after the modulation of little liquid crystal display 54, to be converted to the P polarized light that carries image information, and with on its reflected back polarizing beam splitter 44, by polarizing beam splitter 44 with this P polarized light transmission to projection lens 3.In other words, projection lens 3 and little liquid crystal display 54 opposing parallel are arranged at a side of polarizing beam splitter 44, are used to receive and throw another polarized light that carries image information, i.e. P polarized light.
In other embodiment of the present invention, these little liquid crystal display 54 received polarized lights also can be the P polarized light, through after the modulation of little liquid crystal display 54, be converted to the S polarized light that carries image information, and on its reflected back polarizing beam splitter 44, this S polarized light is reflexed on the projection lens 3 by polarizing beam splitter 44.In other words, projection lens 3 and little liquid crystal display 54 adjacent sides that are arranged at polarizing beam splitter 44, that is, projection lens 3 is arranged at respectively on the adjacent two sides of polarizing beam splitter 44 with little liquid crystal display 54.At this moment, projection lens 3 is to be used to receive and throw the S polarized light that carries image information.
Figure 5 shows that the structural representation of the micro projection optical engine of second embodiment of the invention.The structure of this micro projection optical engine and micro projection optical engine shown in Figure 4 is basic identical, and difference is that little liquid crystal display shown in Figure 5 is the two-piece type liquid crystal panel, is arranged at respectively on the adjacent two sides of polarizing beam splitter 45.Lighting device 1 ' is launched uniform light and be divided into two bundle polarized lights behind polarizing beam splitter 45: S polarized light, P polarized light offer liquid crystal panel 55,55 ' respectively.Two liquid crystal panel output image light synthesize a branch of light again behind polarizing beam splitter 45, output to external screen from projection lens 3 '.
Therefore, the projection lens that the present invention is made up of less lens numbers, simple in structure, size is less, has less veiling glare and aberration, short projection distance, long back focal length satisfies microminiaturized demand, can be embedded on the micromodule equipment.And dispose the micro projection optical engine of this projection lens, the light beam direct irradiation imaging device that lighting device sends, the image of little liquid crystal display in the imaging device is zoomed into real image by projection lens, project projection screen, simple in structure, efficiency of light energy utilization height, image quality is higher, and size is little, and production cost is lower.
The embodiment of the above is a better embodiment of the present invention, is not to limit concrete practical range of the present invention with this, and scope of the present invention comprises and is not limited to this embodiment.For example: little liquid crystal display also can be transmissive liquid crystal panel.The equivalence variation that all shapes according to the present invention, structure are done all comprises in protection scope of the present invention.
Claims (17)
1. projection lens, group lens before comprising, back group lens, and the diaphragm between group lens and the back group lens before being arranged at, it is characterized in that described preceding group lens comprise that series arrangement, most of plane of refraction all bend towards first lens of described diaphragm, second lens and the 3rd lens, wherein, gummed mirror before described second lens and the 3rd lens are formed; Described back group lens comprise tactic the 4th lens and the 5th lens, and wherein, the convex surface of the 4th lens bends towards described diaphragm; Described diaphragm is positioned at the focus place, the place ahead of described back group lens, and the curved surface summit of diaphragm and the interval between the diaphragm are closed on less than the 4th lens in the group lens of described back in the 3rd lens close on diaphragm in the group lens before described curved surface summit and the interval between the diaphragm.
2. projection lens according to claim 1 is characterized in that, described first lens, the 4th lens and the 5th lens are positive lens, and described preceding gummed mirror is negative gummed mirror.
3. projection lens according to claim 1 is characterized in that, to close on the curved surface summit and the interval between the diaphragm of diaphragm be 4mm～5mm to the 4th lens in the described back group lens.
4. projection lens according to claim 1 is characterized in that, the average height of described back group lens is greater than the average height of group lens before described.
5. projection lens according to claim 1 is characterized in that, the combined focal length scope of described preceding group lens is 70mm～80mm.
6. projection lens according to claim 1 is characterized in that, the focal range of described projection lens is 7mm～13mm; The pore diameter range of described projection lens is 8.4mm～23mm, and length range is 12.5mm～36mm.
7. projection lens according to claim 1 is characterized in that, described first lens, second lens, the 3rd lens, the 4th lens and the 5th lens are spherical lens, and its material is the crown glass or the flint glass of high index of refraction.
8. projection lens according to claim 1, it is characterized in that, described back group lens also comprise six lens and seven lens of series arrangement between described diaphragm and the 4th lens, and described the 6th lens and the 7th lens are formed the back gummed mirror that most of plane of refraction all bends towards described diaphragm; Described the 4th lens and the 5th lens form the center symmetry; Before described in the group lens the 3rd lens close on the curved surface summit of diaphragm and the curved surface summit of diaphragm and the interval between the diaphragm are closed on less than the 6th lens in the group lens of described back in the interval between the diaphragm.
9. projection lens according to claim 8 is characterized in that, to close on the curved surface summit and the interval between the diaphragm of diaphragm be 3mm～5mm to the 6th lens in the described back group lens.
10. projection lens according to claim 8 is characterized in that, the combined focal length scope of described preceding group lens is 30mm～50mm.
11. projection lens according to claim 8 is characterized in that, the focal range of described projection lens is 10mm～20mm; The pore diameter range of described projection lens is 6.8mm～30mm, and length range is 12.5mm～36mm.
12. projection lens according to claim 8, it is characterized in that, described first lens, second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens are spherical lens, and its material is the crown glass or the flint glass of high index of refraction.
13. to 12 any described projection lens, it is characterized in that according to Claim 8 polishing respectively and be the plane in the bottom of described the 4th lens, the 5th lens and top.
14. a micro projection optical engine comprises:
Lighting device;
Imaging device by the irradiation of described lighting device, forms image;
It is characterized in that, also comprise, be used for receiving and throwing the formed image of described imaging device according to any described projection lens in the claim 1 to 13.
15. a kind of micro projection optical engine according to claim 14 is characterized in that, described imaging device comprises:
Polarizing beam splitter is arranged on the output light path of described lighting device;
Little liquid crystal display is used for received polarized light is modulated, and is converted to another polarized light vertical with this polarized light, and makes this another polarized light carry image information.
16. a kind of micro projection optical engine according to claim 15 is characterized in that, described little liquid crystal display is the single chip liquid crystal panel, is arranged at a non-adjacent side of described polarizing beam splitter and lighting device.
17. a kind of micro projection optical engine according to claim 15 is characterized in that, described little liquid crystal display is two liquid crystal panels, is arranged at respectively on the adjacent two sides of described polarizing beam splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810241681A CN101770066A (en) | 2008-12-30 | 2008-12-30 | Projection lens and minisize projection optical engine using the projecting lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810241681A CN101770066A (en) | 2008-12-30 | 2008-12-30 | Projection lens and minisize projection optical engine using the projecting lens |
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| CN101770066A true CN101770066A (en) | 2010-07-07 |
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| CN200810241681A Pending CN101770066A (en) | 2008-12-30 | 2008-12-30 | Projection lens and minisize projection optical engine using the projecting lens |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103430074A (en) * | 2011-03-18 | 2013-12-04 | 富士胶片株式会社 | Image pick-up lens and image pick-up device |
| CN108897132A (en) * | 2018-07-23 | 2018-11-27 | 福建福光股份有限公司 | A kind of 20mm machine vision optical system |
| CN109983384A (en) * | 2016-11-22 | 2019-07-05 | 精工爱普生株式会社 | Projection optics system and projector |
| TWI762147B (en) * | 2021-01-08 | 2022-04-21 | 大陸商信泰光學（深圳）有限公司 | Projection lens assembly |
| US11867920B2 (en) | 2021-01-08 | 2024-01-09 | Sintai Optical (Shenzhen) Co., Ltd. | Beam splitting and combining device and electronic device |
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| DE861160C (en) * | 1945-06-30 | 1952-12-29 | Kern & Co Ag | Spherical, astigmatic and comatic for one or more color corrected photographic lenses |
| US5731915A (en) * | 1995-10-27 | 1998-03-24 | Fuji Photo Optical Co., Ltd. | Readout lens |
| US20070081259A1 (en) * | 2005-10-10 | 2007-04-12 | Largan Precision Co., Ltd. | Imaging lens array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE861160C (en) * | 1945-06-30 | 1952-12-29 | Kern & Co Ag | Spherical, astigmatic and comatic for one or more color corrected photographic lenses |
| US5731915A (en) * | 1995-10-27 | 1998-03-24 | Fuji Photo Optical Co., Ltd. | Readout lens |
| US20070081259A1 (en) * | 2005-10-10 | 2007-04-12 | Largan Precision Co., Ltd. | Imaging lens array |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103430074A (en) * | 2011-03-18 | 2013-12-04 | 富士胶片株式会社 | Image pick-up lens and image pick-up device |
| CN103430074B (en) * | 2011-03-18 | 2016-01-20 | 富士胶片株式会社 | Imaging lens and imaging device |
| CN109983384A (en) * | 2016-11-22 | 2019-07-05 | 精工爱普生株式会社 | Projection optics system and projector |
| CN109983384B (en) * | 2016-11-22 | 2021-06-22 | 精工爱普生株式会社 | Projection optical system and projector |
| CN108897132A (en) * | 2018-07-23 | 2018-11-27 | 福建福光股份有限公司 | A kind of 20mm machine vision optical system |
| CN108897132B (en) * | 2018-07-23 | 2020-12-22 | 福建福光股份有限公司 | 20mm machine vision optical system |
| TWI762147B (en) * | 2021-01-08 | 2022-04-21 | 大陸商信泰光學（深圳）有限公司 | Projection lens assembly |
| US11867920B2 (en) | 2021-01-08 | 2024-01-09 | Sintai Optical (Shenzhen) Co., Ltd. | Beam splitting and combining device and electronic device |
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Address after: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 No. 1 Building 6 East Applicant after: Butterfly Technology (Shenzhen) Limited Address before: 518055, 301, two, Fengyun technology building, Fifth Industrial Zone, North Ring Road, Shenzhen, Guangdong, Nanshan District Applicant before: Butterfly Technology (Shenzhen) Limited |
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Application publication date: 20100707 |