CN101339263A - Manufacture method window prism for collecting palm (finger) print image - Google Patents
Manufacture method window prism for collecting palm (finger) print image Download PDFInfo
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- CN101339263A CN101339263A CNA2008101409142A CN200810140914A CN101339263A CN 101339263 A CN101339263 A CN 101339263A CN A2008101409142 A CNA2008101409142 A CN A2008101409142A CN 200810140914 A CN200810140914 A CN 200810140914A CN 101339263 A CN101339263 A CN 101339263A
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Abstract
The invention relates to a manufacturing method for a window prism used for collecting palm (finger) prints, which comprises processes such as hanging, milling, grinding, secondary hanging, secondary milling, secondary grinding, polishing, washing, edge chamfering, detecting package rotation, film coating, and the like. By adopting cold glue and water gel to finish the combination of spare parts and a high-accuracy glass frock, the angular accuracy error of the processed spare parts is ensured. By adopting a plane laser interferometer in field detection, optimal surface shape accuracy can be obtained, thus solving the distortion problem of the optical imaging of the collected objects, ensuring the restoration degree of the collected objects and reducing the probability of wrong recognition of palm (finger) prints. By additionally plating a broadband anti-reflection coating onto a light admitting surface of the window prism, the bandwidth reaches 400 - 900nm. By additionally plating a high-hardness film onto the surface of the anti-reflection coating, the problems of small transmission amount of the image collection window prism, existence of unneeded stray light, and easy scratch and dirt remain on the window prism surface are solved.
Description
Technical field
The present invention relates to a kind of method for making of prism, particularly a kind of method for making that is used for gathering the window prism of slapping (finger) print image.
Background technology
Being used for gathering the palm (finger) print image window prism is a kind of a kind of part of gathering on the palm (finger) print image device that is used in, and also is one of technology of gathering most critical in the palm (finger) print image device.At first, as the substitute products of fingerprint capturer, it is very high to the angular accuracy requirement of window prism to gather the palm (finger) print image device, to guarantee seriousness and accuracy legally; Secondly, the logical optical surface surface figure accuracy of gathering the palm (finger) print image window prism promptly got to reach good light transmission capacity, can farthest eliminate unwanted veiling glare again; Moreover the indefinite people of the palm (finger) line collector uses also has very high requirement to gathering logical optical surface smooth finish of the palm (finger) print image window prism and hardness.
Traditional prism is produced on dish process using paraffin as cementing agent, by heating that part and metal fixture is bonding, but precision be cannot say for sure to demonstrate,prove very much in the assorted process of metal fixture, adding on the part dish is to add gentle cooling, caused metal fixture to produce distortion like this in shock heating quenching, the angular accuracy of part is not easy to be guaranteed.In the polishing link, with aperture to plate, contact the back with piece surface and observe the light belt that produces, as the foundation of judging the piece surface precision, but piece surface is owing in using the process that plate is detected, cause logical optical surface to scratch easily, and such detection method can not accomplish to detect each part, can only spot-check, make the surface figure accuracy of part can not get basic assurance.Make image acquisition window prism surface stay dirt easily, easily scratch drawback to the simple process of the logical optical surface of image acquisition window prism.
Summary of the invention
The invention provides a kind of method for making that is used for gathering the window prism of the palm (finger) print image, utilize the window prism of the collection palm (finger) print image that this method makes to have angular accuracy height, surface accuracy height and image acquisition window prism skin hardness, highly polished characteristics.
A kind of method for making that is used for the window prism of the collection palm (finger) print image comprises
A) go up dish: carry out the combination of window prism base substrate and high-accuracy glass frock with cold glue, to guarantee to gather the physical dimension precision and the angle precision of the palm (finger) print image window prism;
B) milling: with grinding machine the first road milling operation is carried out on the surface of window prism, make the surface to be machined of window prism have an even curface and strict control processing dimension;
C) grind: the window prism surface to be machined is carried out the careful grinding in first road, to eliminate tangible milling scuffing and graininess pit;
D) coil on the secondary: utilize and coil the combination of technology on the glue, determine to gather the physical dimension precision and the angle precision of the palm (finger) print image window prism once more smart base of window prism and high-accuracy glass frock;
E) secondary milling: use the finish-milling machine that the second road milling operation is carried out on the surface of window prism base substrate;
F) regrind: use refiner that the second road grinding step is carried out on the surface of window prism base substrate, guarantee not have trickle scuffing and fine particle shape pit before entering next procedure;
G) polishing: use buffing machine that the surface to be machined of window prism is polished, in polishing process, use the non-contact laser flat interferometer uninterruptedly to follow the tracks of detection, reach technical requirement with the surperficial face shape of guaranteeing part to be processed;
H) clean: the foreign material on the window prism are cleaned with supersonic wave cleaning machine;
I) bevelling: use bevelling equipment that the arris of window prism is carried out protective bevel;
J) detecting bag changes: utilize high illuminator that the surface of window prism is detected, and with the laser plane interferometer surface figure accuracy of detection window prism surface once more;
K) plated film: earlier window prism is carried out 18～25 layers broad-band transparence-increased plated film and do the reinforcement check, and then carry out 23～30 layers hard films, be difficult for being scratched and polluting in the surface in use to guarantee window prism on the surface of broad-band transparence-increased plated film.
Because the present invention adopts cold glue and glue to finish the combination of part and high-accuracy glass frock, has guaranteed the angular accuracy error of part to be processed; Adopted the scene of planar laser interferometer to detect, can adjust the amplitude of oscillation of polishing at any time, to reach best surperficial surface figure accuracy, at utmost solved distortion problem to the optical imagery of gathering object, guaranteed to be gathered the maximum reducing degree of object, reduced the probability that the mistake of the palm (finger) line is distinguished, logical optical surface at window prism adds the broad-band transparence-increased film of plating system, bandwidth reaches 400～900nm, add the high hard films of plating on the anti-reflection film system surface, it is little to have solved image acquisition window prism light transmission capacity, eliminate unwanted veiling glare, easily scratch with the window prism surface, the problem of easy residual dirt.
Description of drawings
Fig. 1 is the process flow diagram of the method for making of a kind of window prism that is used for gathering the palm (finger) print image of the present invention.
Embodiment
A kind of method for making that is used for the window prism of the collection palm (finger) print image of the present invention comprises
A) go up dish: carry out the combination of window prism base substrate and high-accuracy glass frock with cold glue, to guarantee to gather the physical dimension precision and the angle precision of the palm (finger) print image window prism;
B) milling: with conventional high-precision vertical surface grinding machine the first road milling operation is carried out on the surface of window prism, make the surface to be machined of window prism have an even curface and strict control processing dimension;
C) grind: the window prism surface to be machined is carried out the careful grinding in first road, to eliminate tangible milling scuffing and graininess pit;
D) coil on the secondary: utilize and coil the combination of technology on the glue, determine to gather the physical dimension precision and the angle precision of the palm (finger) print image window prism once more smart base of window prism and high-accuracy glass frock;
E) secondary milling: use the finish-milling machine that the second road milling operation is carried out on the surface of window prism base substrate;
F) regrind: use refiner that the second road grinding step is carried out on the surface of window prism base substrate, guarantee not have trickle scuffing and fine particle shape pit before entering next procedure;
G) polishing: use buffing machine that the surface to be machined of window prism is polished, in polishing process, use contactless Japanese fuji uninterruptedly to follow the tracks of detection by laser plane interferometer, reach technical requirement with the surperficial face shape of guaranteeing part to be processed;
H) clean: the foreign material on the window prism are cleaned with supersonic wave cleaning machine;
I) bevelling: use bevelling equipment that the arris of window prism is carried out protective bevel;
J) detecting bag changes: utilize high illuminator that the surface of window prism is detected, and with the laser plane interferometer surface figure accuracy of detection window prism surface once more;
K) plated film: earlier window prism is carried out 18～25 layers broad-band transparence-increased plated film and do the reinforcement check, and then carry out 23～30 layers hard films, be difficult for being scratched and polluting in the surface in use to guarantee window prism on the surface of broad-band transparence-increased plated film.
Because the present invention adopts cold glue and water to be stained with the combination of carrying out part and high-accuracy glass frock, has guaranteed the angular accuracy error of part to be processed; Adopted the scene of planar laser interferometer to detect, can adjust the amplitude of oscillation of polishing at any time, to reach best surperficial surface figure accuracy, at utmost solved distortion problem to the optical imagery of gathering object, guaranteed to be gathered the maximum reducing degree of object, reduced the probability that the mistake of the palm (finger) line is distinguished, logical optical surface at window prism adds the broad-band transparence-increased film of plating system, bandwidth reaches 400～900nm, add the high hard films of plating on the anti-reflection film system surface, it is little to have solved image acquisition window prism light transmission capacity, eliminate unwanted veiling glare, easily scratch with the window prism surface, the problem of easy residual dirt.
Attached: the product and the domestic and international similar products contrast table that produces that use the inventive method to produce
| This Project Product | Domestic approximate product | External existing product | |
| The appearance and size precision | ±0.05 | ±0.1 | ±0.05 |
| Angular accuracy | ＜3′ | ＜15′ | ＜3′ |
| Surface accuracy | 1/4λ | 1-2λ | 1/2λ |
| Amount of distortion | ＜1％ | ＜6％ | ＜2％ |
| Resolving power (Filed) | ＞500DPI | ＞380DPI | ＞500DPI |
| Surface smoothness | GB/T1185-1989III (40-20) | GB/T1185-1989IV (60-40) | GB/T1185-1989III (40-20) |
| Surface coating | 400～900nm (adding the plating hard films) | Do not have | 450～870nm (no hard films) |
| Characteristics | The precision height, the high amount of distortion of resolution ratio is little, rediscover is surperficial not easy to wear | Low precision, differentiate that the rate variance amount of distortion is big, the untrue surface of reduction is easy to wear | The precision height, the high amount of distortion of resolution ratio is little, rediscover is surperficial easy to wear |
| The surface is difficult for residual dirt | The easy residual dirt in surface | The easy residual dirt in surface |
Can find out that by upper table the window prism of the product that utilization the inventive method is produced is than domestic and foreign current Product has that precision height, resolution ratio height, amount of distortion are little, rediscover, surface are not easy to wear, the surface is difficult for The advantage of residual dirt.
Claims (1)
1. one kind is used for the method for making that the window prism of (finger) print image is slapped in collection, and it is characterized in that: described method for making comprises
A) go up dish: carry out the combination of prism base substrate and high-accuracy glass frock with cold glue, to guarantee to gather the physical dimension precision and the angle precision of the palm (finger) print image window prism;
B) milling: with grinding machine the first road milling operation is carried out on the surface of window prism, make the surface to be machined of window prism have an even curface and strict control processing dimension;
C) grind: the window prism surface to be machined is carried out the careful grinding in first road, to eliminate tangible milling scuffing and graininess pit;
D) coil on the secondary: utilize and coil the combination of technology on the glue, determine to gather the physical dimension precision and the angle precision of the palm (finger) print image prism once more smart base of window prism and high-accuracy glass frock;
E) secondary milling: use the finish-milling machine that the second road milling operation is carried out on the surface of window prism base substrate;
F) regrind: use refiner that the second road grinding step is carried out on the surface of window prism base substrate, guarantee not have trickle scuffing and fine particle shape pit before entering next procedure;
G) polishing: use buffing machine that the surface to be machined of window prism is polished, in polishing process, use the non-contact laser flat interferometer uninterruptedly to follow the tracks of detection, reach technical requirement with the surperficial face shape of guaranteeing part to be processed;
H) clean: the foreign material on the window prism are cleaned with supersonic wave cleaning machine;
I) bevelling: use bevelling equipment that the arris of window prism is carried out protective bevel;
J) detecting bag changes: utilize high illuminator that the surface of window prism is detected, and with the laser plane interferometer surface figure accuracy of detection window prism surface once more;
K) plated film: earlier window prism is carried out 18～25 layers broad-band transparence-increased plated film and do the reinforcement check, and then carry out 23～30 layers hard films, be difficult for being scratched and polluting in the surface in use to guarantee window prism on the surface of broad-band transparence-increased plated film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101409142A CN101339263A (en) | 2008-07-26 | 2008-07-26 | Manufacture method window prism for collecting palm (finger) print image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101409142A CN101339263A (en) | 2008-07-26 | 2008-07-26 | Manufacture method window prism for collecting palm (finger) print image |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101339263A true CN101339263A (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101409142A Pending CN101339263A (en) | 2008-07-26 | 2008-07-26 | Manufacture method window prism for collecting palm (finger) print image |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506913A (en) * | 2013-08-29 | 2014-01-15 | 利达光电股份有限公司 | Method for machining optical lens with three radii |
| CN103786080A (en) * | 2012-10-31 | 2014-05-14 | 苏州苏大明世光学股份有限公司 | Spectacle lens machining method and antifatigue lens produced through same |
| CN103949952A (en) * | 2014-02-26 | 2014-07-30 | 四川欧瑞特光电科技有限公司 | Processing method of main lens of large-OD (Outer Diameter) deformable mirror |
| CN107471028A (en) * | 2017-09-07 | 2017-12-15 | 中车唐山机车车辆有限公司 | Grinding method and system |
| CN110370094A (en) * | 2019-07-29 | 2019-10-25 | 丹阳丹耀光学有限公司 | A kind of processing technology and equipment of frosted prism |
-
2008
- 2008-07-26 CN CNA2008101409142A patent/CN101339263A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786080A (en) * | 2012-10-31 | 2014-05-14 | 苏州苏大明世光学股份有限公司 | Spectacle lens machining method and antifatigue lens produced through same |
| CN103506913A (en) * | 2013-08-29 | 2014-01-15 | 利达光电股份有限公司 | Method for machining optical lens with three radii |
| CN103506913B (en) * | 2013-08-29 | 2016-02-03 | 利达光电股份有限公司 | 3 radius optical lens processing methods |
| CN103949952A (en) * | 2014-02-26 | 2014-07-30 | 四川欧瑞特光电科技有限公司 | Processing method of main lens of large-OD (Outer Diameter) deformable mirror |
| CN103949952B (en) * | 2014-02-26 | 2016-04-13 | 四川欧瑞特光电科技有限公司 | A kind of processing method of large external diameter distorting lens primary mirror |
| CN107471028A (en) * | 2017-09-07 | 2017-12-15 | 中车唐山机车车辆有限公司 | Grinding method and system |
| CN110370094A (en) * | 2019-07-29 | 2019-10-25 | 丹阳丹耀光学有限公司 | A kind of processing technology and equipment of frosted prism |
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