CN106404357A - Automatic test system and automatic test method for focal length of optical lens - Google Patents
Automatic test system and automatic test method for focal length of optical lens Download PDFInfo
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- CN106404357A CN106404357A CN201610994814.0A CN201610994814A CN106404357A CN 106404357 A CN106404357 A CN 106404357A CN 201610994814 A CN201610994814 A CN 201610994814A CN 106404357 A CN106404357 A CN 106404357A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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Abstract
The invention discloses an automatic test system for the focal length of an optical lens, which is used for performing a focal length test on an optical lens to be tested. The automatic test system comprises base support subsystem, a light source subsystem, an imaging subsystem, a data acquisition and display subsystem, a driving power supply subsystem and a stepper motor subsystem, and is characterized in that the light source subsystem and the imaging subsystem are sequentially arranged along the length direction of the base support subsystem; the optical lens to be tested is arranged between the light source subsystem and the imaging subsystem, and is arranged on the base support subsystem; the data acquisition and display subsystem is in communication connection with the imaging subsystem; the driving power supply subsystem drives the optical lens to be tested to perform zooming and is in communication connection with the data acquisition and display subsystem; and the stepper motor subsystem drives the imaging subsystem and is in communication connection with the data acquisition and display subsystem. The invention further discloses an automatic test method. The automatic test system and the automatic test method overcome deficiencies that an existing focometer is small in measuring range, and a high-speed photography interface profile shooting method is limited in application and the like. The automatic test system and the automatic test method are large in measuring range, high in precision and capable of realizing automatic measurement.
Description
Technical field
The present invention relates to optical lens focal length technical field of measurement and test is and in particular to a kind of optical lens focal length tests system automatically
System and automatic test approach.
Background technology
Electrowetting zooming liquid lens are based on bionics techniques, break through current spatial imaging and e measurement technology bottleneck, complete big
The functions such as small field of view is adjustable, continuous vari-focus imaging, and have：Varifocal, blur-free imaging on a large scale；Single lens, low cost；Knot
Structure is simple, takes up room little；Shock resistance is high；Electric field controls, are swift in response；No-movable part, high reliability.
The focal length of lens is an important parameter of reflection optical system and lens peculiarity, and the therefore measurement for lens also shows
Obtain particularly important, select a kind of appropriate effective measuring method to become the key point of measurement lens performance.Liquid is saturating
Mirror focal length changes with voltage change, and focal length variations are interval big, and conventional focal length instrument is difficult to meet the interval requirement of focometry；Using
The method that high-speed photography shoots liquid lens interface profile acquisition focal length can only be worked as it is impossible to be suitable for for the transparent situation of mirror body itself
Front major part liquid lens products.
Content of the invention
It is an object of the invention to provide a kind of optical lens focal length Auto-Test System and automatic test approach, overcome
Existing focometer range is little and high-speed photography shoots interface profile method and is suitable for the deficiencies such as limitation, the range of the present invention is big,
High precision, is capable of automatic measurement.
In order to achieve the above object, the present invention is achieved through the following technical solutions：A kind of optical lens focal length is tested automatically
System, is used for treating photometry lens and carries out focal length test, is characterized in, this focal length Auto-Test System comprises：
Base support subsystem and along its length on the light source subsystem that sets gradually and imaging subsystems；
Described optical lens to be measured is arranged between described light source subsystem and imaging subsystems, and is arranged on described
Base support subsystem on；
One data acquisition display subsystem, with described imaging subsystems communication connection；
One driving power supply subsystem, drives described optical lens to be measured to carry out zoom, and shows with described data acquisition
Show that subsystem communication connects；
One stepper motor subsystem, drives described imaging subsystems, and leads to described data acquisition display subsystem
Letter connects；
Light source subsystem sends the collimated light beam after graduation and exposes on optical lens to be measured, and stepper motor subsystem drives
Dynamic imaging subsystems move, and change the magnitude of voltage of driving power supply subsystem output, are clearly schemed with forming one on imaging subsystems
Picture, data acquisition display subsystem carries out parsing and obtains the corresponding focal length value of this magnitude of voltage to this image.
Described light source subsystem comprises the LED/light source of an offer illumination, and a pair of illumination carries out the graticle and of graduation
The parallel light tube of collimated light beam is provided.
Described graticle is Ronchi grating.
Described imaging subsystems comprise the grating image device being sequentially connected and camera imaging device, and described grating becomes
As device is used for Ronchi grating is imaged, described camera imaging device is used for obtaining grating image, and obtains Lang Qiguang
The screen periods of grid；Described stepper motor subsystem comprises a stepper motor and a drive control device, described stepper motor
It is arranged on the lower section of described camera imaging device, to drive camera imaging device to move and to drive grating image device to move,
Described drive control device is communicated to connect with data acquisition display subsystem.
Between described data acquisition display subsystem and driving power supply subsystem, data acquisition display subsystem and camera
All it is connected using the communications cable between imaging device and between data acquisition display subsystem and drive control device.
Described grating image device is measurement microcobjective.
Described optical lens to be measured is one of liquid lens and ordinary optical eyeglass.
Described optical lens to be measured is connected with described base support subsystem by a lens clamp.
A kind of automatic test approach of optical lens focal length Auto-Test System described above, is characterized in, comprises following
Step：
S1, initialized optical focal length of lens Auto-Test System, and to electricity in optical lens focal length Auto-Test System；
S2, light source subsystem send the collimated light beam after graduation and expose on optical lens to be measured；
S3, drive control device send control command, and stepper motor subsystem drives imaging subsystems to move a predeterminable range
Length；
S4, the magnitude of voltage of change driving power supply subsystem output, imaging subsystems are searched plain algorithm using automatic focusing and are obtained
A most clearly two field picture；
S5, data acquisition display subsystem, according to a most clearly two field picture, close according to the high ratio with image height of grating thing
System, calculates the focal length value of optical lens to be measured；
S6, judge stepper motor subsystem whether reach distance movement extreme position；
If it is not, then return to step S3；
If so, then terminate the automatic test of optical lens focal length.
Described automatic test approach also comprises step S7；
The focal length value of the magnitude of voltage that S7, data acquisition display subsystem export according to driving power supply subsystem and corresponding acquisition
Relation, drafting function curve map.
A kind of present invention optical lens focal length Auto-Test System and automatic test approach compared with prior art have with
Lower advantage：The present invention is based on magnifying power method and combines machine vision, automaton etc., can significantly improve testing efficiency
And the degree of accuracy；Advanced by driving stepper motor imaging subsystems, then find clearly image by changing voltage, obtain
Focal length and the relation of voltage, so can greatly improve the time of measurement, simultaneously because voltage can control more accurate, because
And also can reduce the error that measurement brings.
Brief description
Fig. 1 is a kind of overall structure diagram of present invention optical lens focal length Auto-Test System；
Fig. 2 is positive lens focometry schematic diagram；
Fig. 3 is negative lens focometry schematic diagram.
Specific embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in figure 1, a kind of optical lens focal length Auto-Test System, it is used for treating photometry lens 101 and carries out focal length
Test, optical lens 101 to be measured is one of liquid lens and ordinary optical eyeglass, and this focal length Auto-Test System comprises：
Base support subsystem 102, light source subsystem, imaging subsystems, data acquisition display subsystem 105, driving power supply subsystem
106th, stepper motor subsystem, wherein, light source subsystem comprises the LED/light source 1031 of an offer illumination, and a pair of illumination is carried out point
The graticle 1032 drawn and the parallel light tube 1033 of an offer collimated light beam；Imaging subsystems comprise grating image device 1041 and
Camera imaging device 1042；Stepper motor subsystem comprises a stepper motor 1071 and a drive control device 1072.
As shown in figure 1, light source subsystem and imaging subsystems set along the length direction of described base support subsystem 102
Put, optical lens 101 to be measured is arranged between described light source subsystem and imaging subsystems, and be arranged on described base and prop up
In shelf system 102；Data acquisition display subsystem 105 is led to driving power supply subsystem 106 and drive control device 1072 respectively
Letter connects, and driving power supply subsystem 106 is used for driving described optical lens to be measured 101 to carry out zoom, and stepper motor 1071 sets
Put the lower section in described camera imaging device 1042, to drive camera imaging device 1042 to move and to drive grating image device
1041 is mobile；Described grating image device 1041 is used for Ronchi grating 2022 is imaged, described camera imaging device
1042 are used for obtaining grating image, and obtain the screen periods of Ronchi grating.
In the present embodiment, it is preferred that graticle 2022 adopts Ronchi grating, grating image device 1041 is aobvious using measurement
Speck mirror, optical lens 101 to be measured is connected with described base support subsystem 102 by a lens clamp, driving power supply
Subsystem 106 is made up of function generator, high-voltage amplifier, provides driving voltage for optical lens 101 to be measured, by program control
The output waveform parameter of function generator processed, and the voltage with oscillograph real-time monitoring high-voltage amplifier, obtain treating for driving
The exact voltage value of photometry lens 101；Preferably, data acquisition display subsystem 105 and driving power supply subsystem 106 it
Between, between data acquisition display subsystem 105 and camera imaging device 1042 and data acquisition display subsystem 105 with drive control
All connected using the communications cable 108 between device 1072 processed.
The operation principle of the present invention, as shown in Figures 2 and 3, wherein, Fig. 2 is positive lens focometry schematic diagram, and Fig. 3 is
Negative lens focometry schematic diagram；Parallel light tube 201, measured lens 202 and measurement microcobjective 203 is mainly comprised in Fig. 2；Figure
Parallel light tube 301, measured lens 302 and measurement microcobjective 303 is mainly comprised in 3.According to geometric optics：
Wherein, y ' represents image height, and y expression thing is high, and f ' represents the focal length of lens to be measured, f0' represent measurement apparatus system focal；
Can be obtained by formula (1)：
When the present invention measures the focal length of lens, focal length computing formula is：
During measurement, measured lens are contained on lens clamp, grating graduation groove through parallel light tube, measured lens and shows
It is imaged on after speck mirror on camera focal plane, by measuring the size of picture on graticle, you can obtain the focal length of measured lens.Pass through
Image procossing obtains the screen periods of Ronchi grating picture, you can obtain the ratio between image height and thing height, can using formula (3)
To obtain the focal length value of optical lens to be measured.
In conjunction with above-mentioned optical lens focal length Auto-Test System, the invention also discloses a kind of automatic test approach, bag
Containing following steps：
S1, initialized optical focal length of lens Auto-Test System, and to electricity in optical lens focal length Auto-Test System；
S2, light source subsystem send the collimated light beam after graduation and expose on optical lens to be measured；
S3, drive control device send control command, and stepper motor subsystem drives imaging subsystems to move a predeterminable range
Length；
S4, the magnitude of voltage of change driving power supply subsystem output, imaging subsystems are searched plain algorithm using automatic focusing and are obtained
A most clearly two field picture；
S5, data acquisition display subsystem, according to a most clearly two field picture, close according to the high ratio with image height of grating thing
System, calculates the focal length value of optical lens to be measured；
S6, judge stepper motor subsystem whether reach distance movement extreme position；
If it is not, then return to step S3；
If so, then terminate the automatic test of optical lens focal length；
The focal length value of the magnitude of voltage that S7, data acquisition display subsystem export according to driving power supply subsystem and corresponding acquisition
Relation, drafting function curve map.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
Multiple modifications and substitutions all will be apparent from.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of optical lens focal length Auto-Test System, be used for treating photometry lens carry out focal length test it is characterised in that
This focal length Auto-Test System comprises：
Base support subsystem and along its length on the light source subsystem that sets gradually and imaging subsystems；
Described optical lens to be measured is arranged between described light source subsystem and imaging subsystems, and is arranged on described bottom
On seat support subsystem；
One data acquisition display subsystem, with described imaging subsystems communication connection；
One driving power supply subsystem, drives described optical lens to be measured to carry out zoom, and shows son with described data acquisition
System communicates to connect；
One stepper motor subsystem, drives described imaging subsystems, and with described data acquisition display subsystem communication link
Connect；
Light source subsystem sends the collimated light beam after graduation and exposes on optical lens to be measured, and stepper motor subsystem drives into
As subsystem moves, change the magnitude of voltage of driving power supply subsystem output, so that a picture rich in detail to be formed on imaging subsystems, number
According to collection display subsystem, this image is carried out with parsing and obtain the corresponding focal length value of this magnitude of voltage.
2. optical lens focal length Auto-Test System as claimed in claim 1 is it is characterised in that described light source subsystem bag
Containing a LED/light source providing illumination, a pair of illumination carries out the graticle of graduation and the parallel light tube of an offer collimated light beam.
3. optical lens focal length Auto-Test System as claimed in claim 2 is it is characterised in that described graticle is bright strange
Grating.
4. optical lens focal length Auto-Test System as claimed in claim 1 is it is characterised in that described imaging subsystems bag
Containing the grating image device being sequentially connected and camera imaging device, described grating image device is used for Ronchi grating is become
Picture, described camera imaging device is used for obtaining grating image, and obtains the screen periods of Ronchi grating；Described stepper motor
Subsystem comprises a stepper motor and a drive control device, and described stepper motor is arranged under described camera imaging device
Side, to drive camera imaging device to move and to drive grating image device to move, described drive control device is shown with data acquisition
Show that subsystem communication connects.
5. optical lens focal length Auto-Test System as claimed in claim 4 is it is characterised in that described data acquisition shows
Between subsystem and driving power supply subsystem, between data acquisition display subsystem and camera imaging device and data acquisition shows
All it is connected using the communications cable between subsystem and drive control device.
6. optical lens focal length Auto-Test System as claimed in claim 1 is it is characterised in that described grating image device
For measuring microcobjective.
7. optical lens focal length Auto-Test System as claimed in claim 1 is it is characterised in that described optical lens to be measured
For one of liquid lens and ordinary optical eyeglass.
8. optical lens focal length Auto-Test System as claimed in claim 1 is it is characterised in that described optical lens to be measured
It is connected with described base support subsystem by a lens clamp.
9. the automatic test approach of the optical lens focal length Auto-Test System as described in a kind of any one as claim 1～8,
It is characterized in that, comprise the steps of：
S1, initialized optical focal length of lens Auto-Test System, and to electricity in optical lens focal length Auto-Test System；
S2, light source subsystem send the collimated light beam after graduation and expose on optical lens to be measured；
S3, drive control device send control command, and stepper motor subsystem drives imaging subsystems to move a predeterminable range length；
S4, the magnitude of voltage of change driving power supply subsystem output, it is the most clear that imaging subsystems search plain algorithm acquisition using automatic focusing
A clear two field picture；
S5, data acquisition display subsystem according to a most clearly two field picture, according to the high proportionate relationship with image height of grating thing, meter
Calculate the focal length value drawing optical lens to be measured；
S6, judge stepper motor subsystem whether reach distance movement extreme position；
If it is not, then return to step S3；
If so, then terminate the automatic test of optical lens focal length.
10. automatic test approach as claimed in claim 1 is it is characterised in that comprise step S7 further；
The pass of the magnitude of voltage that S7, data acquisition display subsystem export according to driving power supply subsystem and the focal length value of corresponding acquisition
System, drafting function curve map.
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| CN107091729A (en) * | 2017-05-12 | 2017-08-25 | 南京邮电大学 | A kind of focal length of lens method of testing without mechanical movement |
| CN107153000A (en) * | 2017-06-20 | 2017-09-12 | 中国地质大学（武汉） | A kind of portable filter optical performance detecting device and its detection method |
| CN112304572A (en) * | 2019-07-30 | 2021-02-02 | 华为技术有限公司 | Wavefront calibration method and device |
| CN112327479A (en) * | 2021-01-05 | 2021-02-05 | 北京卓立汉光仪器有限公司 | Optical imaging system and method for adjusting imaging parameters by programming |
| CN113418680A (en) * | 2021-06-23 | 2021-09-21 | 青岛大学 | Device and method for measuring focal length of thin convex lens based on electro-optical modulation |
| CN114427954A (en) * | 2021-12-28 | 2022-05-03 | 北京耐德佳显示技术有限公司 | Device and method for testing visibility of near-to-eye display system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091729A (en) * | 2017-05-12 | 2017-08-25 | 南京邮电大学 | A kind of focal length of lens method of testing without mechanical movement |
| CN107153000A (en) * | 2017-06-20 | 2017-09-12 | 中国地质大学（武汉） | A kind of portable filter optical performance detecting device and its detection method |
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| CN112327479A (en) * | 2021-01-05 | 2021-02-05 | 北京卓立汉光仪器有限公司 | Optical imaging system and method for adjusting imaging parameters by programming |
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| CN113418680B (en) * | 2021-06-23 | 2024-01-26 | 青岛大学 | Electro-optic modulation-based thin convex lens focal length measuring device and method |
| CN114427954A (en) * | 2021-12-28 | 2022-05-03 | 北京耐德佳显示技术有限公司 | Device and method for testing visibility of near-to-eye display system and storage medium |
| CN114427954B (en) * | 2021-12-28 | 2024-02-13 | 北京耐德佳显示技术有限公司 | Visibility testing device and method for near-eye display system and storage medium |
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Application publication date: 20170215 |