CN112433342A - Ultra-high resolution miniature projection lens - Google Patents
Ultra-high resolution miniature projection lens Download PDFInfo
- Publication number
- CN112433342A CN112433342A CN202011395413.6A CN202011395413A CN112433342A CN 112433342 A CN112433342 A CN 112433342A CN 202011395413 A CN202011395413 A CN 202011395413A CN 112433342 A CN112433342 A CN 112433342A
- Authority
- CN
- China
- Prior art keywords
- lens
- ultra
- high resolution
- micro projection
- resolution micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses an ultra-high resolution miniature projection lens which comprises a first lens group with a positive focal length, a diaphragm, a second lens group with a positive focal length, a galvanometer, a prism, a window sheet and a DMD (digital micromirror device) which are sequentially arranged. The first lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in sequence; the second lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are arranged in sequence, and the sixth lens, the seventh lens and the eighth lens are cemented lenses. The second lens is a plastic aspheric lens, the tenth lens is a glass aspheric lens, and other lenses are glass spherical lenses. The first lens, the second lens, the third lens and the third cemented lens have negative focal power, and the fourth lens, the fifth lens, the ninth lens and the tenth lens have positive focal power. The miniature projection lens has small total length, can be compatible with XPR technology, realizes 4K ultrahigh resolution and meets the requirements of miniature projection equipment.
Description
Technical Field
The invention relates to the technical field of WeChat projection lenses, in particular to an ultrahigh-resolution miniature projection lens.
Background
The projection lens is a core component of the projection device: after passing through the reflective or transmissive light modulation device, the light needs to be projected onto a projection screen through a projection lens for imaging.
As the projection device plays a larger and larger role in life, the application field is also increased. More devices need to be embedded into a miniature projection device, which has higher and higher requirements on a projection lens, and the miniature projection device has smaller size and more compact structure.
However, in order to achieve a small size, the resolution of the projection lens currently available on the market is reduced, and thus the requirement of high resolution users cannot be met.
Disclosure of Invention
The invention provides an ultra-high resolution miniature projection lens, which aims to solve the problem that the existing miniature projection lens cannot meet the high resolution required by the market.
The technical scheme adopted by the invention is as follows: the utility model provides a miniature projection lens of ultrahigh resolution, including first lens group, diaphragm, the second lens group, prism, window piece and the DMD that set gradually with the positive focal length.
Preferably, the lens barrel further includes a galvanometer disposed between the second lens group and the prism.
Preferably, the first lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, which are arranged in this order; the second lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are arranged in sequence, and the sixth lens, the seventh lens and the eighth lens are cemented lenses.
Preferably, the second lens is a plastic aspheric lens, the tenth lens is a glass aspheric lens, and the other lenses are glass spherical lenses.
Preferably, the first lens, the second lens, the third lens and the third cemented lens have negative focal power, and the fourth lens, the fifth lens, the ninth lens and the tenth lens have positive focal power.
Preferably, the optical constants of the materials used for all the spherical lenses satisfy the following conditional expressions: 1.48< Nd <1.95, 17< Vd <85, where Nd, Vd are the refractive index and Abbe number, respectively, of the optical material used for d-light.
Preferably, the lens is a telecentric lens, and the projection ratio of the lens is 1.2.
Preferably, the effective focal length of the lens is 12.74mm, and the effective focal length of the lens is 1.7F/no.
Preferably, the first lens is made of optical glass with a refractive index of 1.95.
Preferably, the lens is a 0.47 inch DMD chip.
The invention has the beneficial effects that:
(1) the micro projection lens disclosed by the invention has a small total length and meets the requirements of micro projection equipment.
(2) The miniature projection lens disclosed by the invention adopts a telecentric system, the illumination is uniform, and the illumination of the full field is not less than 0.8.
(3) The micro projection lens disclosed by the invention can be compatible with an XPR technology, and can realize 4K resolution when the XPR is used; when XPR is not used, 1080P resolution is achieved.
(4) The miniature projection lens disclosed by the invention has the advantages that the contrast full-field of view is higher than 0.8, the imaging quality is good, and the distortion can reach within 1%.
(5) Compared with other micro-projection lenses on the market, the last lens of the lens adopts a glass aspheric surface, so that the problem of serious focus leakage caused by heating of the plastic aspheric surface of the other micro-projection lenses can be effectively solved.
(6) The first lens is made of optical glass material with high refractive index, so that the height of a light beam can be effectively reduced, and the first lens has great effects on correcting distortion and reducing the caliber of a subsequent lens.
(7) The plastic aspheric surface is arranged at the position of the second lens, so that the influence of scratch and collision on the surface shape of the aspheric surface can be effectively avoided.
(8) The triple cemented lens has a great effect on correcting the secondary spectrum, and the cemented lens is arranged near the diaphragm, so that the chromatic aberration correction effect is good.
Drawings
Fig. 1 is an optical structure diagram of an ultra-high resolution micro projection lens provided in embodiment 1 of the present invention.
Fig. 2 is a MTF graph of each field of view transfer function of the ultra-high resolution micro projection lens according to embodiment 1 of the present invention.
Fig. 3 is a dot-sequence diagram of an ultra-high resolution micro projection lens provided in embodiment 1 of the present invention.
Fig. 4 is a field curvature distortion diagram of an ultra-high resolution micro projection lens provided in embodiment 1 of the present invention.
Fig. 5 is a relative illuminance diagram of an ultra-high resolution micro projection lens according to embodiment 1 of the present invention.
Fig. 6 is a vertical axis chromatic aberration diagram of an ultra-high resolution micro projection lens provided in embodiment 1 of the present invention.
Fig. 7 is an optical structure diagram of an ultra-high resolution micro projection lens according to embodiment 2 of the present invention.
Fig. 8 is a MTF graph of each field of view transfer function of the ultra-high resolution micro projection lens according to embodiment 2 of the present invention.
Fig. 9 is a dot-sequence diagram of an ultra-high resolution micro projection lens according to embodiment 2 of the present invention.
Fig. 10 is a field curvature distortion diagram of an ultra-high resolution micro projection lens according to embodiment 2 of the present invention.
Fig. 11 is a vertical axis chromatic aberration diagram of an ultra-high resolution micro projection lens provided in embodiment 2 of the present invention.
Reference numerals: 1. a first lens; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. a fifth lens; 6. a diaphragm; 7. a sixth lens; 8. a seventh lens; 9. an eighth lens; 10. a ninth lens; 11. a tenth lens; 12. a galvanometer; 13. a prism; 14. a window sheet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings, but embodiments of the present invention are not limited thereto.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
Example 1:
referring to fig. 1, fig. 1 is an optical structure diagram of a micro projection lens provided in an application example of the present invention; the invention provides a miniature projection lens of ultra-high resolution, this lens includes: the lens comprises a first lens group with a positive focal length, a diaphragm 6, a second lens group with a positive focal length, a galvanometer 12, a prism 13, a window sheet 14 and a DMD which are arranged in sequence; the first lens group comprises a first lens 1 which is a glass spherical lens, a second lens 2 which is a plastic aspheric lens, a third lens 3 which is a glass spherical lens, a fourth lens 4 which is a glass spherical lens and a fifth lens 5 which is a glass spherical lens; the second lens group includes a sixth lens 7 which is a glass spherical lens, a seventh lens 8 which is a glass spherical lens, an eighth lens 9 which is a glass spherical lens, a ninth lens 10 which is a glass spherical lens, and a tenth lens 11 which is a glass aspherical lens.
The first lens 1 has negative focal power, the second lens 2 has negative focal power, the third lens 3 has negative focal power, the fourth lens 4 has positive focal power, the fifth lens 5 has positive focal power, the sixth lens 7, the seventh lens 8 and the eighth lens 9 form a triple cemented lens which has negative focal power, the ninth lens 10 has positive focal power, and the tenth lens 11 has positive focal power.
The first lens 1 is made of high-refractive-index optical glass, the refractive index of the existing optical glass is generally 1.4-2.0, the refractive index of the material used for the first lens 1 is high, about 1.95 is selected, the height of a light beam can be effectively reduced, and the optical lens has great effects on correcting distortion and reducing the calibers of subsequent lenses. The plastic aspheric surface is arranged at the position of the second lens, so that the influence of scratch and collision on the surface shape of the aspheric surface can be effectively avoided. The triple cemented lens has a great effect on correcting the secondary spectrum, and the cemented lens is arranged near the diaphragm 6, so that the chromatic aberration correction effect is good. The tenth lens 11 can effectively solve the defect of lens focusing caused by heating of a plastic aspheric surface. The lens has the characteristics of large bias, large projection ratio and high imaging quality.
The specific parameters of the micro projection lens provided by the invention are shown in table 1:
TABLE 1
N in Table 1dRepresents the refractive index, VdRepresents the Abbe number.
Wherein the second lens 2 and the tenth lens 11 are aspherical surfaces, and the expression of the aspherical surface type is
Where Z denotes a distance in the optical axis direction from a point on the aspherical surface to the vertex of the aspherical surface, ρ denotes a distance from the point on the aspherical surface to the optical axis, c denotes a central curvature of the aspherical surface, k denotes a conicity, and An denotes the number of higher orders of the aspherical surface.
The aspheric coefficients of the second lens 2 and the tenth lens 11 are shown in table 2.
TABLE 2
In this embodiment, a DMD chip of 0.47 inch is used, the pixel size is 5.4 μ, the corresponding design resolution is 93lp/mm, the effective focal length is 12.74mm, the F/No. is 1.7, the offset is 100%, the projection distance is 1.6m to 3.2m, the corresponding projection size is 60 inches to 120 inches, the projection ratio is 1.2, and the 4K resolution can be achieved by using a galvanometer. The application example is a telecentric system and has small telecentricity.
From the lens parameters in table 1, the micro projection lens shown in fig. 1 can be obtained. FIG. 2 is an image of MTF variation of a full field with spatial frequency, the closer the MTF is to a diffraction limit, the better the imaging quality is, and the better the imaging quality is when the MTF of each field under the spatial frequency of 93lp/mm is greater than 0.5. FIG. 3 is a dot diagram of each field, and the lens full field RMS is smaller than the pixel size (5.4 μ), so that clear imaging can be realized. In FIG. 4, the left image is an image of field curvature as a function of field of view, the field curvature being in the range of-0.05 mm to 0.05 mm; the right image is an image with distortion varying with the field of view, and the distortion is controlled within 1%. Fig. 5 is an image showing the variation of relative illuminance with the field of view, where the relative illuminance refers to the ratio of the illuminance at one field of view to the central illuminance, and it can be seen that the illuminance is not less than 0.8 in the full field of view. FIG. 6 is a vertical axis chromatic aberration image, the vertical axis chromatic aberration obtained from the image is controlled below 2.1 μ, which is smaller than half pixel size, and the vertical axis chromatic aberration is well controlled.
Example 2
Referring to fig. 7, fig. 7 is an optical structure diagram of an ultra-high resolution micro projection lens provided in embodiment 2 of the present invention. In this embodiment, a conventional resolution of 1080P is achieved by adjusting the back intercept without using a galvanometer (XPR), and specific parameters are shown in table 3:
TABLE 3
From the lens parameters described in table 3, a micro projection lens as shown in fig. 7 can be obtained. FIG. 8 is an image of full field MTF as a function of spatial frequency, with a transfer function MTF >0.45 for each field at 93lp/mm spatial frequency. FIG. 9 is a dot diagram of each field of view whose spot size is larger due to the presence of spherical aberration, but whose full field RMS is still smaller than the pixel size (5.4 μ). In FIG. 10, the left image is an image of field curvature as a function of field of view, the field curvature being in the range of-0.05 mm to 0.05 mm; the right image is an image with distortion varying with the field of view, and the distortion is controlled within 1%. FIG. 11 is a vertical axis chromatic aberration image, the vertical axis chromatic aberration obtained from the image is controlled below 2.1 μ, which is smaller than half pixel size, and the vertical axis chromatic aberration is well controlled.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a miniature projection lens of ultrahigh resolution, its characterized in that, including first lens group, diaphragm, the second lens group, prism, window piece and the DMD that sets gradually that have the positive focal length.
2. The ultra-high resolution micro projection lens of claim 1, further comprising a galvanometer disposed between the second lens group and the prism.
3. The ultra-high resolution micro projection lens of claim 1 or 2, wherein the first lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in sequence; the second lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are arranged in sequence, and the sixth lens, the seventh lens and the eighth lens are cemented lenses.
4. The ultra-high resolution micro projection lens of claim 3, wherein the second lens is a plastic aspheric lens, the tenth lens is a glass aspheric lens, and the other lenses are glass spherical lenses.
5. The ultra-high resolution micro projection lens of claim 4, wherein the first lens, the second lens, the third lens and the third cemented lens have negative optical power, and the fourth lens, the fifth lens, the ninth lens and the tenth lens have positive optical power.
6. The ultra-high resolution micro projection lens of claim 5, wherein the optical constants of the materials used for all the spherical lenses satisfy the following conditional expression: 1.48< Nd <1.95, 17< Vd <85, where Nd, Vd are the refractive index and Abbe number, respectively, of the optical material used for d-light.
7. The ultra-high resolution micro projection lens of claim 6, wherein the lens is telecentric and the lens has a throw ratio of 1.2.
8. The ultra-high resolution micro projection lens of claim 6, wherein the effective focal length of the lens is 12.74mm, and F/NO is 1.7.
9. The ultra-high resolution micro projection lens of claim 3, wherein the first lens is made of optical glass with a refractive index of 1.95.
10. The ultra-high resolution micro projection lens of claim 3, wherein the lens is a 0.47 inch DMD chip.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011395413.6A CN112433342B (en) | 2020-12-03 | 2020-12-03 | Ultra-high resolution miniature projection lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011395413.6A CN112433342B (en) | 2020-12-03 | 2020-12-03 | Ultra-high resolution miniature projection lens |
Publications (2)
Publication Number | Publication Date |
---|---|
CN112433342A true CN112433342A (en) | 2021-03-02 |
CN112433342B CN112433342B (en) | 2022-05-03 |
Family
ID=74691913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011395413.6A Active CN112433342B (en) | 2020-12-03 | 2020-12-03 | Ultra-high resolution miniature projection lens |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112433342B (en) |
Citations (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08313807A (en) * | 1995-05-17 | 1996-11-29 | Asahi Optical Co Ltd | Multibeam recording device |
JPH11109225A (en) * | 1997-09-30 | 1999-04-23 | Nikon Corp | Image re-forming optical system |
US20020176058A1 (en) * | 2000-10-25 | 2002-11-28 | Hiroto Yasui | Zoom lens system and projection apparatus using the same |
JP2004317645A (en) * | 2003-04-14 | 2004-11-11 | Casio Comput Co Ltd | Projection lens |
US20040257666A1 (en) * | 2003-04-10 | 2004-12-23 | Seiko Epson Corporation | Projection lens and projection image display apparatus |
US20070014025A1 (en) * | 2005-04-22 | 2007-01-18 | Canon Kabushiki Kaisha | Optical system |
CN101403816A (en) * | 2008-11-07 | 2009-04-08 | 秦皇岛视听机械研究所 | 240 degree field angle ultra-large pore diameter fish-eye lens base structure |
EP2149808A2 (en) * | 2008-08-02 | 2010-02-03 | Ricoh Company, Ltd. | Retrofocus type of imaging lens |
JP2010122326A (en) * | 2008-11-17 | 2010-06-03 | Fujinon Corp | Zoom lens for projection and projection-type display device |
CN102466874A (en) * | 2010-11-05 | 2012-05-23 | 鸿富锦精密工业(深圳)有限公司 | Zooming projection lens |
CN102621672A (en) * | 2012-04-02 | 2012-08-01 | 上海三鑫科技发展有限公司 | High-throw-ratio projection objective |
CN102944926A (en) * | 2012-11-30 | 2013-02-27 | 无锡羿飞科技有限公司 | Short-focus projection lens structure with transmittance of 0.75 |
US20140043693A1 (en) * | 2012-08-10 | 2014-02-13 | Carl Zeiss Ag | Optical system for imaging an object |
US20150219884A1 (en) * | 2014-02-04 | 2015-08-06 | Konica Minolta, Inc. | Variable magnification projection optical system and image projection apparatus |
CN106405795A (en) * | 2016-10-18 | 2017-02-15 | 中国航空工业集团公司洛阳电光设备研究所 | Large-view-field large-relative-aperture solar blind ultraviolet optical system |
CN106501918A (en) * | 2015-09-04 | 2017-03-15 | 中强光电股份有限公司 | Projection device and projection lens |
CN107065145A (en) * | 2017-04-28 | 2017-08-18 | 深圳市东正光学技术有限公司 | Bugeye lens |
US20170293124A1 (en) * | 2016-04-06 | 2017-10-12 | Olympus Corporation | Zoom optical system and image pickup apparatus using the same |
CN107632379A (en) * | 2017-11-01 | 2018-01-26 | 东莞市宇瞳光学科技股份有限公司 | Small-sized ultra-large aperture starlight level ultra-wide angle zoom lens |
CN209311771U (en) * | 2018-12-29 | 2019-08-27 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
US20190265444A1 (en) * | 2018-02-28 | 2019-08-29 | Fujifilm Corporation | Wide-angle lens, projection lens, relay lens, projection-type display apparatus, and relay lens unit |
CN209640594U (en) * | 2019-04-16 | 2019-11-15 | 中山联合光电科技股份有限公司 | A kind of inexpensive, high-resolution ultrashort out-of-focus projection's Optical devices |
CN110646918A (en) * | 2019-08-22 | 2020-01-03 | 广景视睿科技(深圳)有限公司 | Projection lens |
CN211402902U (en) * | 2019-12-31 | 2020-09-01 | 成都极米科技股份有限公司 | Projection lens |
CN111929861A (en) * | 2020-09-16 | 2020-11-13 | 厦门力鼎光电股份有限公司 | High definition fisheye lens |
CN212873039U (en) * | 2020-09-14 | 2021-04-02 | 四川长虹电器股份有限公司 | Miniature projection lens and projection equipment |
CN215910718U (en) * | 2020-12-14 | 2022-02-25 | 四川长虹电器股份有限公司 | Laser television |
-
2020
- 2020-12-03 CN CN202011395413.6A patent/CN112433342B/en active Active
Patent Citations (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08313807A (en) * | 1995-05-17 | 1996-11-29 | Asahi Optical Co Ltd | Multibeam recording device |
JPH11109225A (en) * | 1997-09-30 | 1999-04-23 | Nikon Corp | Image re-forming optical system |
US20020176058A1 (en) * | 2000-10-25 | 2002-11-28 | Hiroto Yasui | Zoom lens system and projection apparatus using the same |
US20040257666A1 (en) * | 2003-04-10 | 2004-12-23 | Seiko Epson Corporation | Projection lens and projection image display apparatus |
JP2004317645A (en) * | 2003-04-14 | 2004-11-11 | Casio Comput Co Ltd | Projection lens |
US20070014025A1 (en) * | 2005-04-22 | 2007-01-18 | Canon Kabushiki Kaisha | Optical system |
EP2149808A2 (en) * | 2008-08-02 | 2010-02-03 | Ricoh Company, Ltd. | Retrofocus type of imaging lens |
CN101403816A (en) * | 2008-11-07 | 2009-04-08 | 秦皇岛视听机械研究所 | 240 degree field angle ultra-large pore diameter fish-eye lens base structure |
JP2010122326A (en) * | 2008-11-17 | 2010-06-03 | Fujinon Corp | Zoom lens for projection and projection-type display device |
CN102466874A (en) * | 2010-11-05 | 2012-05-23 | 鸿富锦精密工业(深圳)有限公司 | Zooming projection lens |
CN102621672A (en) * | 2012-04-02 | 2012-08-01 | 上海三鑫科技发展有限公司 | High-throw-ratio projection objective |
US20140043693A1 (en) * | 2012-08-10 | 2014-02-13 | Carl Zeiss Ag | Optical system for imaging an object |
CN102944926A (en) * | 2012-11-30 | 2013-02-27 | 无锡羿飞科技有限公司 | Short-focus projection lens structure with transmittance of 0.75 |
US20150219884A1 (en) * | 2014-02-04 | 2015-08-06 | Konica Minolta, Inc. | Variable magnification projection optical system and image projection apparatus |
CN106501918A (en) * | 2015-09-04 | 2017-03-15 | 中强光电股份有限公司 | Projection device and projection lens |
US20170293124A1 (en) * | 2016-04-06 | 2017-10-12 | Olympus Corporation | Zoom optical system and image pickup apparatus using the same |
CN106405795A (en) * | 2016-10-18 | 2017-02-15 | 中国航空工业集团公司洛阳电光设备研究所 | Large-view-field large-relative-aperture solar blind ultraviolet optical system |
CN107065145A (en) * | 2017-04-28 | 2017-08-18 | 深圳市东正光学技术有限公司 | Bugeye lens |
CN107632379A (en) * | 2017-11-01 | 2018-01-26 | 东莞市宇瞳光学科技股份有限公司 | Small-sized ultra-large aperture starlight level ultra-wide angle zoom lens |
US20190265444A1 (en) * | 2018-02-28 | 2019-08-29 | Fujifilm Corporation | Wide-angle lens, projection lens, relay lens, projection-type display apparatus, and relay lens unit |
CN209311771U (en) * | 2018-12-29 | 2019-08-27 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
CN209640594U (en) * | 2019-04-16 | 2019-11-15 | 中山联合光电科技股份有限公司 | A kind of inexpensive, high-resolution ultrashort out-of-focus projection's Optical devices |
CN110646918A (en) * | 2019-08-22 | 2020-01-03 | 广景视睿科技(深圳)有限公司 | Projection lens |
CN211402902U (en) * | 2019-12-31 | 2020-09-01 | 成都极米科技股份有限公司 | Projection lens |
CN212873039U (en) * | 2020-09-14 | 2021-04-02 | 四川长虹电器股份有限公司 | Miniature projection lens and projection equipment |
CN111929861A (en) * | 2020-09-16 | 2020-11-13 | 厦门力鼎光电股份有限公司 | High definition fisheye lens |
CN215910718U (en) * | 2020-12-14 | 2022-02-25 | 四川长虹电器股份有限公司 | Laser television |
Non-Patent Citations (1)
Title |
---|
侯国柱等: "基于ZEMAX的大视场投影镜头设计", 《应用光学》 * |
Also Published As
Publication number | Publication date |
---|---|
CN112433342B (en) | 2022-05-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110824674A (en) | Optical lens for projection | |
CN109491053B (en) | Miniature projection lens | |
CN106896480B (en) | Telecentric zoom lens of projector | |
CN109445075B (en) | Miniature projection lens | |
CN109407288B (en) | Refraction and reflection type ultra-short-focus projection lens system | |
CN114296218A (en) | Projection lens and projection system | |
WO2023273441A1 (en) | Projection optical system | |
CN114296220A (en) | Projection lens and projection system | |
CN114296217A (en) | Projection lens and projection system | |
CN113504633A (en) | Projection system | |
CN107422464B (en) | Zoom projection optical system | |
CN209311772U (en) | A kind of Miniature projection lens | |
CN110632741A (en) | Projection lens | |
CN108681052B (en) | High-resolution, large-image-plane, small-volume and infrared confocal zoom optical system | |
CN111580247B (en) | Integrally-focusing high-definition micro-projection lens | |
CN212873039U (en) | Miniature projection lens and projection equipment | |
CN210666175U (en) | Lens combination of camera lens, camera lens and 3D printing device | |
TWI412813B (en) | Zoom projection lens | |
CN112433342B (en) | Ultra-high resolution miniature projection lens | |
WO2023005244A1 (en) | Zoom lens for projection | |
CN110471166A (en) | A kind of low distortion compact high-resolution FISH EYE LENS OPTICS system | |
CN113126253B (en) | High-resolution direct-injection type short-focus projection lens | |
CN114089501B (en) | Optical lens for projection | |
CN211554449U (en) | Optical lens for projection | |
CN210690932U (en) | 4K pixel level high-resolution projection zoom lens |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |