CN201837771U - Short-focus lens - Google Patents
Short-focus lens Download PDFInfo
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- CN201837771U CN201837771U CN2010205432850U CN201020543285U CN201837771U CN 201837771 U CN201837771 U CN 201837771U CN 2010205432850 U CN2010205432850 U CN 2010205432850U CN 201020543285 U CN201020543285 U CN 201020543285U CN 201837771 U CN201837771 U CN 201837771U
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Abstract
The utility model relates to a short-focus lens which is provided with a single negative lens (1), a single negative lens (2), a single positive lens (3), a single positive lens (4), a single positive lens (5) and an infrared optical filtering lens (6) in sequence from an object space to an image space. The short-focus lens is characterized in that the lens achieves the following performance parameters: the focus f' is equal to 1.34mm, the visual field deviates by 163%, the optical distortion is less than 10%, the ratio of the edge to the central illumination intensity is more than or equal to 1:5, the size of a CMOS (Complementary Metal-Oxide-Semiconductor Transistor)/CCD (charged-coupled device) chip is 1/4'', the angle of the visual field is 142 degrees, and when the standard projection distance is 500mm, the size of the acquired image is 60''.
Description
[technical field]
The utility model relates to the photoelectric display technical field, and what relate generally to is the short-focus lens that uses on a kind of interactive electric whiteboard system.
[background technology]
Existing common interactive electric whiteboard system is a multifunctional write plateform system that integrates digital rear-projection, interactive electric whiteboard, computer, this plateform system volume is big, the cost height, and screen-sized is restricted, whole system uses more fixing, and maneuverability is not strong.Compared with prior art, this blank technology is used the unique low beam receiving system in the world of original creation, by adjusting projector distance, can absorb blank, projection screen, flat panel TV, plasma and LCD TV etc. and just throw carrier, and the image information on the common wall, realize more large scale, bigger range of application, interactive electric whiteboard more easily, the user does not need additionally to increase cost just can carry out larger sized upgrading (plate face enlarge back only need adjust the distance of short focal length camera module group lens and blank a little get final product) easily.
[utility model content]
The purpose of this utility model is: the situation according to present common interactive electric whiteboard system inconvenience provides a kind of short-focus lens, " the CM0S system use that matches; it can absorb blank, projection screen, flat panel TV, plasma and LCD TV etc. and just throw image information on carrier and the common wall realizes more large scale, bigger range of application, interactive electric whiteboard more easily with 1/4.
Of the present utility model being achieved through the following technical solutions: a kind of short-focus lens, be followed successively by single negative lens (1) from the object side to the image side, single negative lens (2), single-positive-lens (3), single-positive-lens (4), single-positive-lens (5), infrared filter (6), it is characterized in that the performance parameter that this camera lens will reach is: focal distance f '=1.34mm, the visual field departs from 163%, optical distortion＜10%, margin and center illumination is than 〉=1: 5, the CMOS/CCD chip size is 1/4 "; its field of view angle is 142 °; when the benchmark projector distance is 500mm, and images acquired is of a size of 60 ".
The radius R 1=25.509mm of described single negative lens (1), R2=8.075mm, thickness d=4.39mm, airspace d=4.02mm.
First of described single negative lens (2) is sphere, radius R 1=13.02mm, second is plastics even aspheric surface, its radius R 2=2.9mm, asphericity coefficient K=-1.04, A4=-0.00066, A6=-4.172E-005, A8=5.1E-007, thickness d=1.1mm, airspace d=8.48mm.
The radius R 1=2.679mm of described single-positive-lens (3), R2=3.394mm, thickness d=2.01mm, airspace d=1mm.
The radius R 1=-5.74mm of described single-positive-lens (4), R2=-2.885mm, thickness d=1.75mm, airspace d=0.15mm.
The radius R 1=12.706mm of described single negative lens (5), R2=-12.706mm, thickness d=1.44mm, airspace d=0.15mm.
Thickness d=the 0.7mm of described infrared filter (6), airspace d=1.28mm.
Described CMOS/CCD chip (7) size 1/4 ", length breadth ratio is 4: 3, compatible 16: 9.
[description of drawings]
Figure one is an optical system diagram of the present invention.
Figure two is structural drawing of the present invention.
Number in the figure, the 1st, single negative lens, the 2nd, single negative lens, the 3rd, single-positive-lens, the 4th, single-positive-lens, the 5th, single-positive-lens, the 6th, infrared filter, 7 is 1/4 " CMOS chip, the 8th, flange, the 9th, main body.
[embodiment]
Short-focus lens of the present utility model, have body shell, objective lens, flange, the wherein combination of body shell internal fixation object lens lens is arranged in order from left to right respectively and becomes to have single negative lens, single negative lens, single-positive-lens, single-positive-lens, single-positive-lens, single-positive-lens, infrared filter, the 1/4 " assembly of CMOS chip.
In this short-focus lens, sequence number 2 is the plastic aspherical element lens, and second is aspheric surface, mainly is the distortion for corrective system." CMOS (7) chip is connected the back by screw and forms this short focus mirror head system by being threaded with main body (9) flange (8) and 1/4; wherein flange (8) can be adjusted total system because the CMOS image planes displacement error that the part manufacturing brings with main body (9) by being threaded; play system's focusing action in addition when projector distance changes, the assurance system is pickup image information accurately.
The performance parameter that short-focus lens of the present invention will reach is: focal distance f '=1.34mm, the visual field departs from 163%, optical distortion＜10%, margin and center illumination is than 〉=1: 5, the CMOS chip size is 1/4 "; its field of view angle is 142 °, and when the benchmark projector distance was 500mm, images acquired was of a size of 60 ".
For satisfying the requirement of above-mentioned performance parameter, the structural parameters of each lens in the short-focus lens optical system are further described below by embodiment.
In figure one, from left to right: the radius R 1=25.509mm of single negative lens (1), R2=8.075mm, thickness d=4.39mm, airspace d=4.02mm.
First of single negative lens (2) is sphere, radius R 1=13.02mm, and second is plastics even aspheric surface, its radius R 2=2.9mm, asphericity coefficient K=-1.04, A4=-0.00066, A6=-4.172E-005, A8=5.1E-007, thickness d=1.1mm, airspace d=8.48mm.
The radius R 1=2.679mm of single-positive-lens (3), R2=3.394mm, thickness d=2.01mm, airspace d=1mm.
The radius R 1=-5.74mm of single-positive-lens (4), R2=-2.885mm, thickness d=1.75mm, airspace d=0.15mm.
The radius R 1=12.706mm of single negative lens (5), R2=-12.706mm, thickness d=1.44mm, airspace d=0.15mm.
Thickness d=the 0.7mm of infrared filtering (6), airspace d=1.28mm.
CMOS chip (7) size 1/4 ", length breadth ratio is 4: 3, compatible 16: 9.
Claims (8)
1. short-focus lens, be followed successively by single negative lens (1), single negative lens (2), single-positive-lens (3), single-positive-lens (4), single-positive-lens (5), infrared filter (6) from the object side to the image side, it is characterized in that the performance parameter that this camera lens will reach is: focal distance f '=1.34mm, the visual field departs from 163%, optical distortion＜10%, margin and center illumination is than 〉=1: 5, the CMOS/CCD chip size is 1/4 "; its field of view angle is 142 °; when the benchmark projector distance is 500mm, and images acquired is of a size of 60 ".
2. a kind of short-focus lens as claimed in claim 1 is characterized in that: the radius R 1=25.509mm of described single negative lens (1), R2=8.075mm, thickness d=4.39mm, airspace d=4.02mm.
3. a kind of short-focus lens as claimed in claim 1, it is characterized in that: first of described single negative lens (2) is sphere, radius R 1=13.02mm, second is plastics even aspheric surface, its radius R 2=2.9mm, asphericity coefficient K=-1.04, A4=-0.00066, A6=-4.172E-005, A8=5.1E-007, thickness d=1.1mm, airspace d=8.48mm.
4. a kind of short-focus lens as claimed in claim 1 is characterized in that: the radius R 1=2.679mm of described single-positive-lens (3), R2=3.394mm, thickness d=2.01mm, airspace d=1mm.
5. a kind of short-focus lens as claimed in claim 1 is characterized in that: the radius R 1=-5.74mm of described single-positive-lens (4), R2=-2.885mm, thickness d=1.75mm, airspace d=0.15mm.
6. a kind of short-focus lens as claimed in claim 1 is characterized in that: the radius R 1=12.706mm of described single negative lens (5), R2=-12.706mm, thickness d=1.44mm, airspace d=0.15mm.
7. a kind of short-focus lens as claimed in claim 1 is characterized in that: the thickness d=0.7mm of described infrared filter (6), airspace d=1.28mm.
8. a kind of short-focus lens as claimed in claim 1 is characterized in that: described CMOS/CCD chip (7) size 1/4 ", length breadth ratio is 4: 3, compatible 16: 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205432850U CN201837771U (en) | 2010-09-27 | 2010-09-27 | Short-focus lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205432850U CN201837771U (en) | 2010-09-27 | 2010-09-27 | Short-focus lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201837771U true CN201837771U (en) | 2011-05-18 |
Family
ID=44007878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205432850U Expired - Fee Related CN201837771U (en) | 2010-09-27 | 2010-09-27 | Short-focus lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201837771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419472A (en) * | 2010-09-27 | 2012-04-18 | 南京芒冠光电科技股份有限公司 | Short-focus lens |
-
2010
- 2010-09-27 CN CN2010205432850U patent/CN201837771U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419472A (en) * | 2010-09-27 | 2012-04-18 | 南京芒冠光电科技股份有限公司 | Short-focus lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 2, Nanjing, Jiangsu, Qinhuai should be 388 days Street No. 210000, building E13, West Patentee after: Nanjing Mangguan Opto-Electronics Technology Co., Ltd. Address before: 603 room 420, Pioneer Center, Zhonghua Road, Qinhuai District, Jiangsu, Nanjing, 210016 Patentee before: Nanjing Mangguan Opto-Electronics Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: NANJING MAGON OPTO-ELECTRICAL SCIENCE AND TECHNOLO Free format text: FORMER NAME: NANJING MANGGUAN OPTO-ELECTRONICS TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 2, Jiangsu, Nanjing should be 388 days Street No. 210000, building E13, West Patentee after: Nanjing Magon Opto-Electrical Science and Technology Co., Ltd. Address before: 2, Nanjing, Jiangsu, Qinhuai should be 388 days Street No. 210000, building E13, West Patentee before: Nanjing Mangguan Opto-Electronics Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20140927 |
|
| EXPY | Termination of patent right or utility model |