CN103698107B - Negative lens focal length proving installation and method of testing - Google Patents
Negative lens focal length proving installation and method of testing Download PDFInfo
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- CN103698107B CN103698107B CN201310660582.1A CN201310660582A CN103698107B CN 103698107 B CN103698107 B CN 103698107B CN 201310660582 A CN201310660582 A CN 201310660582A CN 103698107 B CN103698107 B CN 103698107B
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- negative lens
- focal length
- imageing sensor
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- sieve plate
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Abstract
The present invention relates to a kind of negative lens focal length proving installation and method of testing, this negative lens focal length proving installation comprises light source, target simulation system, surveillance and data acquisition and processing system; Target simulation system and surveillance are successively set on the emitting light path of light source; Surveillance is connected with data acquisition and processing system; Negative lens to be measured is arranged between target simulation system and surveillance.The invention provides a kind of error is little and measurement efficiency is high negative lens focal length proving installation and method of testing.
Description
Technical field
The invention belongs to optical testing art, relate to a kind of negative lens focal length proving installation and method of testing, particularly relate to a kind of focal length negative lens focal length proving installation and method of testing.
Background technology
Negative lens is the conventional optical element in optical measuring device, and after it machines, focal length is an important parameter, and it is whether accurate that its focal length is processed, and directly affects the docking of whole light path.
Conventional test methodologies: to the test of short burnt negative lens focal length, the test macro usually adopting parallel light tube and long working distance microscope to form, tests its focal length by magnification method; And the test to focal length negative lens focal length, general employing supplementary lens method is tested, and the positive lens composition galilean telescope system adopting a focal distance ratio negative lens focal length long, makes its defocusing amount be zero, by testing its visual amplification, indirect inspection negative lens focal length, this method needs positive negative lens to dock, and set-up procedure is complicated, and measure the focus error that main source of error is positive lens, this method of testing takes time and effort, inefficiency, and precision is also relatively low.
Summary of the invention
In order to solve the above-mentioned technical matters existed in background technology, the invention provides a kind of error is little and measurement efficiency is high negative lens focal length proving installation and method of testing.
Technical solution of the present invention is: the invention provides a kind of negative lens focal length proving installation, its special character is: described negative lens focal length proving installation comprises light source, target simulation system, surveillance and data acquisition and processing system; Described target simulation system and surveillance are successively set on the emitting light path of light source; Described surveillance is connected with data acquisition and processing system; Negative lens to be measured is arranged between target simulation system and surveillance.
Above-mentioned target simulation system comprises glass sieve plate and parallel light tube; Described glass sieve plate and parallel light tube are successively set on the emitting light path of light source.
Above-mentioned glass sieve plate is arranged on the focal plane of parallel light tube.
Above-mentioned surveillance comprises zoom lens and imageing sensor; Negative lens to be measured, zoom lens and imageing sensor are arranged in same light path; Described imageing sensor is connected with data acquisition and processing system.
Above-mentioned imageing sensor is the imageing sensor aimed at two-wire.
The collection computer for controlling that above-mentioned data acquisition and processing system comprises length measuring mechanism and is connected with length measuring mechanism; Described imageing sensor is connected with collection computer for controlling.
Based on a negative lens focal length method of testing for negative lens focal length proving installation as above, its special character is: said method comprising the steps of:
1) open light source, illumination focal plane is equipped with the parallel light tube of glass sieve plate;
2) be placed between parallel light tube and zoom lens by negative lens to be measured, negative lens to be measured becomes the virtual image to glass sieve plate;
3) surveillance be made up of zoom lens and imageing sensor is to step 2) virtual image that obtains monitors;
4) regulate zoom lens, the supervision face of zoom lens is overlapped through negative lens imaging face to be measured with glass sieve plate;
5) glass sieve plate is aimed at as of line centering with the imageing sensor that aims at two-wire;
6) length measuring mechanism is reset, then aims at glass sieve plate as another of line centering with imageing sensor, record length that length measuring mechanism is surveyed, then the focal distance f ' be of negative lens:
Wherein:
F is parallel light tube focal length;
L is the right spacing of POLO printed line;
L ' is that glass sieve printed line is to the image height through negative lens imaging.
The invention has the advantages that:
The invention provides a kind of negative lens focal length proving installation and method of testing, utilize parallel light tube, zoom lens, imageing sensor, the combination of collection computer for controlling, adopt the measurement of magnification method realization to focal length negative lens focal length; Adopt the surveillance of zoom lens and imageing sensor composition, avoid the error that human eye aims at visual fatigue introducing.Adopt this device, automaticity is high, is applicable to the measurement of focal length negative lens focal length, increases work efficiency.Adopt this device, without the impact of supplementary lens, measuring accuracy improves further.The method of testing of focal length negative lens focal length provided by the present invention, solves the deficiency of supplementary lens method test, drastically increases work efficiency and focal length measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the principle schematic of negative lens focal length proving installation provided by the present invention;
Wherein:
1-light source; 2-glass sieve plate; 3-parallel light tube; 4-negative lens to be measured; 5-zoom lens; 6-imageing sensor; 7-length measuring mechanism; 8-gathers computer for controlling.
Embodiment
See Fig. 1, the invention provides a kind of negative lens focal length proving installation, its special character is: negative lens focal length proving installation comprises light source 1, target simulation system, surveillance and data acquisition and processing system; Target simulation system and surveillance are successively set on the emitting light path of light source 1; Surveillance is connected with data acquisition and processing system; Negative lens 4 to be measured is arranged between target simulation system and surveillance.
Target simulation system comprises glass sieve plate 2 and parallel light tube 3; Glass sieve plate 2 and parallel light tube 3 are successively set on the emitting light path of light source 1.
Glass sieve plate 2 is arranged on the focal plane of parallel light tube 3.
Surveillance comprises zoom lens 5 and imageing sensor 6; Negative lens 4 to be measured, zoom lens 5 and imageing sensor 6 are arranged in same light path; Imageing sensor 6 is connected with data acquisition and processing system.
Imageing sensor 6 is the imageing sensors 6 aimed at two-wire.
The collection computer for controlling 8 that data acquisition and processing system comprises length measuring mechanism 7 and is connected with length measuring mechanism 7; Imageing sensor 6 is connected with collection computer for controlling 8.Length measuring mechanism 7 is various devices can measuring length conventional at present.
During work, open light source 1, illumination focal plane is equipped with the parallel light tube 3 of glass sieve plate 2, before negative lens 4 to be measured is placed in parallel light tube 3, the 2 one-tenth virtual images of negative lens to be measured 4 pairs of glass sieve plates, the surveillance be made up of zoom lens 5 and imageing sensor 6 monitors it.Regulate zoom lens 5, face overlaps through negative lens 4 imaging face to be measured with glass sieve plate 2 to make it monitor, glass sieve plate is aimed at as of line centering with the imageing sensor 6 aimed at two-wire, length measuring mechanism 7 is reset, glass sieve plate is aimed at as another of line centering again with imageing sensor 6, record length measuring mechanism 7 survey length, then the focal distance f ' be of negative lens:
In formula, f is parallel light tube focal length, and L is the right spacing of POLO printed line, and L ' glass sieve printed line is to the image height through negative lens imaging.
Claims (4)
1. a negative lens focal length proving installation, is characterized in that: described negative lens focal length proving installation comprises light source, target simulation system, surveillance and data acquisition and processing system; Described target simulation system and surveillance are successively set on the emitting light path of light source; Described surveillance is connected with data acquisition and processing system; Negative lens to be measured is arranged between target simulation system and surveillance;
Described target simulation system comprises glass sieve plate and parallel light tube; Described glass sieve plate and parallel light tube are successively set on the emitting light path of light source;
Described glass sieve plate is arranged on the focal plane of parallel light tube;
Described surveillance comprises zoom lens and imageing sensor; Negative lens to be measured, zoom lens and imageing sensor are arranged in same light path; Described imageing sensor is connected with data acquisition and processing system.
2. negative lens focal length proving installation according to claim 1, is characterized in that: described imageing sensor is the imageing sensor aimed at two-wire.
3. negative lens focal length proving installation according to claim 2, is characterized in that: the collection computer for controlling that described data acquisition and processing system comprises length measuring mechanism and is connected with length measuring mechanism; Described imageing sensor is connected with collection computer for controlling.
4., based on a negative lens focal length method of testing for negative lens focal length proving installation according to claim 3, it is characterized in that: said method comprising the steps of:
1) open light source, illumination focal plane is equipped with the parallel light tube of glass sieve plate;
2) be placed between parallel light tube and zoom lens by negative lens to be measured, negative lens to be measured becomes the virtual image to glass sieve plate;
3) surveillance be made up of zoom lens and imageing sensor is to step 2) virtual image that obtains monitors;
4) regulate zoom lens, the supervision face of zoom lens is overlapped through negative lens imaging face to be measured with glass sieve plate;
5) glass sieve plate is aimed at as of line centering with the imageing sensor that aims at two-wire;
6) length measuring mechanism is reset, then aims at glass sieve plate as another of line centering with imageing sensor, record length that length measuring mechanism is surveyed, then the focal distance f ' be of negative lens:
Wherein:
F is parallel light tube focal length;
L is the right spacing of POLO printed line;
L ' is that glass sieve printed line is to the image height through negative lens imaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660582.1A CN103698107B (en) | 2013-12-06 | 2013-12-06 | Negative lens focal length proving installation and method of testing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660582.1A CN103698107B (en) | 2013-12-06 | 2013-12-06 | Negative lens focal length proving installation and method of testing |
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| Publication Number | Publication Date |
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| CN103698107A CN103698107A (en) | 2014-04-02 |
| CN103698107B true CN103698107B (en) | 2016-04-27 |
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| CN201310660582.1A Expired - Fee Related CN103698107B (en) | 2013-12-06 | 2013-12-06 | Negative lens focal length proving installation and method of testing |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105203304B (en) * | 2015-10-09 | 2018-11-02 | 茂莱（南京）仪器有限公司 | Magnifying power method surveys the optical bench of focal length |
| CN111679426A (en) * | 2020-05-29 | 2020-09-18 | 南通大学 | Design method of focimeter of electrodeless zoom lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086530A (en) * | 2007-07-04 | 2007-12-12 | 中国航空工业第一集团公司第六一三研究所 | 1.064um laser range finder transmitting antenna debugging method and apparatus |
| CN201569558U (en) * | 2009-09-08 | 2010-09-01 | 湖北华中光电科技有限公司 | Automated focal length detector |
| CN102636181A (en) * | 2012-03-16 | 2012-08-15 | 长春奥普光电技术股份有限公司 | Method for detecting focal length of high-precision spatial aerial camera |
| CN203606110U (en) * | 2013-12-06 | 2014-05-21 | 中国科学院西安光学精密机械研究所 | Negative lens focal length test device |
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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086530A (en) * | 2007-07-04 | 2007-12-12 | 中国航空工业第一集团公司第六一三研究所 | 1.064um laser range finder transmitting antenna debugging method and apparatus |
| CN201569558U (en) * | 2009-09-08 | 2010-09-01 | 湖北华中光电科技有限公司 | Automated focal length detector |
| CN102636181A (en) * | 2012-03-16 | 2012-08-15 | 长春奥普光电技术股份有限公司 | Method for detecting focal length of high-precision spatial aerial camera |
| CN203606110U (en) * | 2013-12-06 | 2014-05-21 | 中国科学院西安光学精密机械研究所 | Negative lens focal length test device |
Non-Patent Citations (1)
| Title |
|---|
| 平行光管法测凹透镜焦距及其误差分析;张金平;《河北大学学报(自然科学版)》;19970330;第93－94页 * |
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