CN101718620A - Method and device for measuring multispectral dynamic modulation transfer function - Google Patents
Method and device for measuring multispectral dynamic modulation transfer function Download PDFInfo
- Publication number
- CN101718620A CN101718620A CN200910237436A CN200910237436A CN101718620A CN 101718620 A CN101718620 A CN 101718620A CN 200910237436 A CN200910237436 A CN 200910237436A CN 200910237436 A CN200910237436 A CN 200910237436A CN 101718620 A CN101718620 A CN 101718620A
- Authority
- CN
- China
- Prior art keywords
- modulation transfer
- transfer function
- dynamic
- imaging system
- multispectral
- 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.)
- Pending
Links
Images
Abstract
The invention belongs to the field of optical imaging test, more particularly to a method and a device for measuring a multispectral dynamic modulation transfer function, which can be used for a dynamic performance test of a composite photoelectronic imaging system. In the invention, a multispectral knife-edge division target plate is collimated by an collimating system and then imaged in a tested photoelectronic system fixed on a vibrating table, and modulation transfer functions under different conditions can be obtained after a knife-edge image obtained by the tested photoelectronic imaging system is processed by a computer and then calculated to obtain the tested dynamic modulation transfer function. By translating or rotating the multispectral knife-edge division target plate to simulate target motion and using the vibrating table to simulate the vibration of a weapon platform, the tested dynamic modulation transfer function is real and all-sided, can be used for estimating the dynamic performance of the composite photoelectronic imaging system under the actual service condition and has extremely important application prospect.
Description
Technical field
The invention belongs to the optical imagery field tests, relate to multispectral dynamic modulation transfer function measuring method and device, can be used for the dynamic performance testing of photo electric imaging system.
Technical background
Modulation transfer function of optical system (MTF) is the standard of an objective evaluation optical system imaging quality, fundamentally overcome weak point such as traditional picture element methods of inspection such as star test, resolution, geometrical aberrations, can reflect the imaging character of system all sidedly, in the optical system imaging quality evaluation, occupy critical role.Along with the developing rapidly and using of photoelectric technology, photoelectronic imaging and tracker have been widely used in the every field of national economy, have especially obtained great development in military field.When taking aim at target, the motion of target and the vibration of electro-optical system have replaced the diffraction and the aberration of optical system self, become the principal element that influences bearing accuracy and attack precision in electro-optical system.By further investigation to photo electric imaging system dynamic modulation transport function, can the quantitative test target travel and the electro-optical system vibration to the influence of image quality, and provide theoretical foundation for technology such as shockproof physical construction processing of optics and mode of vibration blurred image restorations.
The nineties initial stage, people such as the Ofer.Hadar of Israel and N.S.Kopeika have just begun the research to dynamic target modulation transfer function, the mathematic(al) representation of dynamic modulation transport function when having derived target linear uniform motion and simple harmonic motion in detail, and carried out experimental verification in the later stage.But in experiment, only finished the measurement of low frequency simple harmonic motion dynamic target modulation transfer function and can't measure the dynamic target modulation transfer function of other forms of motion, and The ultimate results regards linear uniform motion as with the low frequency simple harmonic motion is approximate, and measurement result is produced than mistake.
Target travel also has research to the influence of image quality is domestic, Xi'an Applied Optics Research Inst. in " the moving picture transmission characteristic of time delay imaging system " literary composition from having illustrated the moving picture transmittance process of time delay imaging system in essence, illustrate that moving is to be formed by stacking along a series of continuous still image line spread functions on the displacement coordinate direction as line spread function, proposed to find the solution the mathematics physics model of moving picture line spread function and frequency spectrum thereof, and by this model derived at the uniform velocity moving picture and the line spread function of the moving picture of simple harmonic oscillation and the analytical expression of frequency spectrum thereof.But resulting analytic expression is very complicated in the literary composition, does not carry out specifically, improves ground computational analysis and analog simulation for the model of being set up.
Above-mentioned research all is the dynamic modulation transfer function analysis during at target travel, and the variation of dynamic modulation transport function also has research during at the photo electric imaging system mechanical vibration.Mode of vibration with optical imaging system in the literary composition of Changchun optical precision optical machinery and physical study place " vibration is to the analysis of optical imaging system transport function influence " is divided into extensional vibration and transverse vibration from macroscopic view, at first analyzed extensional vibration, the linear transverse vibration, the sinusoidal transverse vibration of high frequency, the sinusoidal transverse vibration of low frequency, the optical-modulation transfer function of transverse vibration at random, analyzed of the influence of various vibration parameters then to the dynamic modulation transport function, thereby the various engineering measures of mechanical vibration have been proposed to reduce, for the optical-mechanical structure Design of reality provides theoretical foundation to the optical imaging system influence.But its weak point is just the dynamic modulation transport function under the different vibration modes have been carried out theoretical analysis and numerical simulation in the literary composition, not actual measurement.
Photoelectric project system of Beijing Institute of Technology and Beijing Space Electromechanical Research Institute have analyzed when photographing under the space environment condition in " the satellite vibration is to the simulation analysis of image quality influence " literary composition, different models of vibration are to pushing away the result that influences who sweeps type CCD camera imaging quality on the satellite, selective analysis the vibration of three directions to the influence of camera imaging quality.In order to verify the result of simulation analysis, set up a cover ground artificial system, can simulate two types vibration, wherein using drops hammer produces low frequency, large-amplitude vibration, uses piezoelectric ceramics to produce the little of various frequencies and shakes, and simulation influences the camera imaging quality.The analytical test data as can be seen, this test method is analog satellite attitude vibration situation better, according to the formula that is provided, can provide the index calculating method and the scope of satellite attitude stabilization degree, electric shock, shake etc.But the analogue system that this method adopts is very complicated, can not use same set of system to carry out emulation for the vibration of different frequency scope, can't simply, promptly record the dynamic modulation transport function, is not suitable for using in actual measurement.
Said method all is that the dynamic transfer function to target or photo electric imaging system carries out theoretical analysis or measurement in visible-range, but for satisfying the modern high technology war fighting requirement, photoelectric imaging tracing system is developed to TV and infrared compound system by single-sensor, so said method can't satisfy up-to-date test request, be badly in need of a kind of dynamic modulation transport function proving installation at the composite photoelectric imaging system.These methods have all only been paid close attention to the influence of target travel or photoelectric instrument vibration one side to modulation transfer function, and do not take all factors into consideration the situation that the two acts on simultaneously.But in the practical application of photo electric imaging system, above-mentioned two kinds of influences are always simultaneous, so the dynamic modulation transport function that obtains is always not comprehensive, false before, this just requires the dynamic modulation transport function measurement mechanism of motion of a kind of simulated target simultaneously and photo electric imaging system vibration.At multispectral edge of a knife graduation, realize that simultaneously the report of dynamic object, dynamic photoelectric imaging system and dynamic object and dynamic photoelectric imaging system modulation transfer function measurement is not seen up to now as yet.
Summary of the invention
Above shortcomings when the objective of the invention is to overcome dynamic modulation transport function that prior art is used for photoelectric imaging tracing system and measuring, merge multispectral edge of a knife graduation generation technique and photo electric imaging system mechanical vibration emulation technology, a kind of dynamic modulation transport function method of testing and device are proposed, it can be under TV and infrared spectrum condition, realization is to the independent measurement of dynamic object or dynamic photoelectric imaging system modulation transfer function, can realize that also measurement to the two overall dynamics modulation transfer function is to satisfy different test requests.
The objective of the invention is to be achieved through the following technical solutions.
A kind of multispectral dynamic modulation transfer function measuring method of the present invention may further comprise the steps:
Make multispectral edge of a knife graduation target plate (2) and shaking table (4) static, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains obtains static modulation transfer function MTF through after the Computer Processing
i
(a) make multispectral edge of a knife graduation target plate (2) motion, shaking table (4) is static, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains is through obtaining the whole modulation transfer function MTF of dynamic object after the Computer Processing
o
(b) make multispectral edge of a knife graduation target plate (2) static, shaking table (4) vibration, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains is through obtaining the whole modulation transfer function MTF of dynamic photoelectric imaging system after the Computer Processing
e
(c) make multispectral edge of a knife graduation target plate (2) motion, shaking table (4) vibration, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains is through obtaining the whole modulation transfer function MTF of dynamic object and dynamic photoelectric imaging system after the Computer Processing
s
(d) the whole modulation transfer function MTF of the dynamic object that (a) in the step 2 is obtained
oThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic target modulation transfer function asked, as formula 1. shown in:
(e) the whole modulation transfer function MTF of the dynamic photoelectric imaging system that (b) in the step 2 is obtained
eThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic photoelectric imaging system modulation transfer function DMTF that is asked
e, as formula 2. shown in;
(f) the whole modulation transfer function MTF of dynamic object that (c) in the step 2 obtained and dynamic photoelectric imaging system
sThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic object and the dynamic photoelectric imaging system modulation transfer function DMTF that are asked
s, as formula 3. shown in:
。
Measuring method of the present invention can also be measured different many dynamic target modulation transfer function curves constantly, gets the value at each bar curve characteristic frequency place, and connection can obtain dynamic target modulation transfer function curve time response in chronological order.
Measuring method of the present invention, can also measure different many dynamic photoelectric imaging system modulation transfer function curves constantly, get the value at each bar curve characteristic frequency place, and connection can obtain dynamic photoelectric imaging system modulation transfer function curve time response in chronological order.
Measuring method of the present invention, can also measure different many dynamic objects and dynamic photoelectric imaging system modulation transfer function curves constantly, get the value at each bar curve characteristic frequency place, and connection can obtain dynamic object and dynamic photoelectric imaging system modulation transfer function curve time response in chronological order.
The present invention also provides a kind of measurement mechanism of multispectral dynamic modulation transfer function, comprise computing machine (6), also comprise multispectral edge of a knife graduation target plate (2), colimated light system (3), shaking table (4), wherein tested photo electric imaging system (7) is fixed on the shaking table (4), and tested photo electric imaging system (7) is connected by data line with computing machine (6).
Multispectral edge of a knife graduation target plate (2) can be done translation motion, also can rotate.
Colimated light system (3) can collimate to visible and infrared beam simultaneously.
According to the different structure of colimated light system (3), along the light ray propagation direction, can place multispectral edge of a knife graduation target plate (2) and colimated light system (3) successively, also can place colimated light system (3) and multispectral edge of a knife graduation target plate (2) successively.
The present invention has following characteristics and good result:
The present invention introduces dynamic modulation transport function fields of measurement with multispectral technology, the illumination of employing multispectral light source, in system, generate multispectral edge of a knife graduation target, imaging on electro-optical system behind reflective optic colimated light system collimation can detect the dynamic modulation transport function of different spectral coverage simultaneously.With multispectral target generation technique and the fusion of dynamic modulation transport function measuring technique is that the present invention distinguishes one of innovative point of prior art.
The present invention is by translation or rotate multispectral edge of a knife graduation target plate simulated target motion, use the mechanical vibration of shaking table simulated weapons platform, and can simulate above-mentioned two kinds of motions simultaneously, make the more realistic environment for use of dynamic modulation transport function that records, have more practicality.It is two of the present invention's innovative point of distinguishing prior art that simulated target motion simultaneously and photo electric imaging system vibrate.
The present invention obtains curve time response of dynamic modulation transport function by repeatedly measuring different dynamic modulation transport functions constantly, can reflect the situation of change of the image quality of tested photo electric imaging system with run duration intuitively.Curve time response that can record the dynamic modulation transport function is three of the present invention's innovative point of distinguishing prior art.
Because the employing of above-mentioned correlation technique, the present invention has following characteristics:
(1) introducing of multispectral technology makes the present invention can detect the dynamic property of low-light, TV, infrared composite photoelectric imaging system simultaneously, has solved the problem that the dynamic modulation transport function of composite photoelectric imaging system for a long time can't disposable test.
(2) target of the present invention's simulation not only can be done translation motion but also can rotate, and can select suitable forms of motion as required during test, has improved the applicability that the dynamic modulation transport function is measured.
(3) can select the modulation transfer function of independent measurement target travel or the modulation transfer function of photo electric imaging system vibration according to testing requirement the present invention, also can measurement target motion and photo electric imaging system vibrate modulation transfer function under the acting in conjunction, enlarged the measurement range of dynamic modulation transport function, made to measure to have more dirigibility.
(4) utilize curve time response of dynamic modulation transport function, can under various motion conditions, estimate the dynamic imaging performance of tested photo electric imaging system rapidly, exactly, measurement result is come into plain view.
Description of drawings
Fig. 1 is measuring method of the present invention and schematic representation of apparatus;
Fig. 2 is the synoptic diagram of the embodiment of the invention one;
Fig. 3 is the synoptic diagram of the embodiment of the invention two;
Fig. 4 is static modulation transfer function curve;
Fig. 5 is the whole modulation transfer function curve of dynamic photoelectric imaging system;
Fig. 6 is a dynamic photoelectric imaging system modulation transfer function curve;
Fig. 7 is dynamic photoelectric imaging system modulation transfer function curve time response.
Wherein: 1-multispectral light source, the multispectral edge of a knife graduation of 2-target plate, 3-colimated light system, 4-shaking table, 5-vibrating controller, 6-computing machine, the tested photo electric imaging system of 7-, 8-ZnS substrate, 9-Chrome thin layer, 10-parabolic mirror, 11-aspheric surface Cassegrain parallel light tube
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Basic thought of the present invention is to utilize a kind of multispectral edge of a knife graduation target that can move to come the target of skimulated motion, simulate the mechanical vibration of tested photo electric imaging system by the control shaking table, can under multiple motion conditions, realize dynamic modulation transport function test to the composite photoelectric imaging system.
Embodiment one
Fig. 2 is a multispectral dynamic modulation transfer function measurement mechanism of the present invention, comprises multispectral light source 1, multispectral edge of a knife graduation target plate 2, parabolic mirror 10, tested photo electric imaging system 7, shaking table 4, vibrating controller 5 and computing machine 6; Wherein tested photo electric imaging system 7 is fixed on the shaking table 4, and tested photo electric imaging system 7 and computing machine 6 are connected by data line; Wherein multispectral edge of a knife graduation target plate 2 adopts multispectral light source 1 illumination, and tested photo electric imaging system 7 is thermal infrared imagers.
Multispectral edge of a knife graduation target plate 2 can use at visible light and infrared band, multispectral edge of a knife graduation target plate 2 comprises double-layer structure, wherein ZnS substrate 8 can be plated on ZnS substrate 8 edge of a knife graduation zone in addition by the Guang ， Chrome thin layer 9 of transmission from the visible light to the long wave infrared region.
Multispectral edge of a knife graduation target plate 2 can be done translation motion, also can rotate.
Because parabolic mirror 10 collimates by primary event, so multispectral light source 1 is placed on the focus place of parabolic mirror 10, place parabolic mirror 10, multispectral edge of a knife graduation target plate 2 and tested photo electric imaging system 7 successively along the light ray propagation direction.
Shaking table 4 can drive tested photo electric imaging system 7 and do regular motion or random motion.
The concrete course of work of apparatus of the present invention is as follows:
Make multispectral edge of a knife graduation target plate 2 and shaking table 4 static, the imaging on tested photo electric imaging system 7 of multispectral edge of a knife graduation target plate 2, the image that tested photo electric imaging system 7 obtains obtains static modulation transfer function MTF through after the Computer Processing
i
(a) making multispectral edge of a knife graduation target plate 2 is the turning axle rotation with the optical axis, shaking table 4 is static, the imaging on tested photo electric imaging system 7 of multispectral edge of a knife graduation target plate 2, the image that tested photo electric imaging system 7 obtains is through obtaining the whole modulation transfer function MTF of dynamic object after the Computer Processing
o
(b) make multispectral edge of a knife graduation target plate 2 static, do random vibration by vibrating controller 5 control shaking tables 4, the imaging on tested photo electric imaging system 7 of multispectral edge of a knife graduation target plate 2, the image that tested photo electric imaging system 7 obtains is through obtaining the whole modulation transfer function MTF of dynamic photoelectric imaging system after the Computer Processing
e
(c) making multispectral edge of a knife graduation target plate 2 is the turning axle rotation with the optical axis, do random vibration by vibrating controller 5 shaking tables 4, the imaging on tested photo electric imaging system 7 of multispectral edge of a knife graduation target plate 2, the image that tested photo electric imaging system 7 obtains is through obtaining the whole modulation transfer function MTF of dynamic object and dynamic photoelectric imaging system after the Computer Processing
s
(d) the whole modulation transfer function MTF of the dynamic object that (a) in the step 2 is obtained
oThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic target modulation transfer function asked, as formula 1. shown in:
(e) the whole modulation transfer function MTF of the dynamic photoelectric imaging system that (b) in the step 2 is obtained
eThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic photoelectric imaging system modulation transfer function DMTF that is asked
e, as formula 2. shown in;
(f) the whole modulation transfer function MTF of dynamic object that (c) in the step 2 obtained and dynamic photoelectric imaging system
sThe static modulation transfer function MTFi that obtains with step 1 is divided by at the respective frequencies place, obtains the dynamic object and the dynamic photoelectric imaging system modulation transfer function DMTF that are asked
s, as formula 3. shown in:
。
The measuring method of multispectral dynamic modulation transfer function of the present invention, can be in the time T that multispectral edge of a knife graduation target plate 2 rotates a circle, measurement 0, T/8, T/4,3T/8, T/2,5T/8,3T/4, these 8 different many dynamic photoelectric imaging system modulation transfer function curves constantly of 7T/8, get the value at each bar curve 1/4 nyquist frequency place, and connection just obtains dynamic photoelectric imaging system modulation transfer function curve time response in chronological order.
The measuring method of multispectral dynamic modulation transfer function of the present invention, can be in the process of shaking table 4 random vibrations, measured a dynamic photoelectric imaging system modulation transfer function curve in per 30 seconds, through obtaining 20 curves in 10 minutes, get the value at each bar curve 1/4 nyquist frequency place, and connect dynamic photoelectric imaging system modulation transfer function curve time response that can obtain in these 10 minutes in chronological order.
The measuring method of multispectral dynamic modulation transfer function of the present invention, can be in the time T that multispectral edge of a knife graduation target plate 2 rotates a circle, measure 0, different many dynamic objects and the dynamic photoelectric imaging system modulation transfer function curves constantly of these 8 of T/8, T/4,3T/8, T/2,5T/8,3T/4,7T/8, get the value at each bar curve 1/4 nyquist frequency place, and connection can obtain dynamic object and dynamic photoelectric imaging system modulation transfer function curve time response in chronological order.
Embodiment two
Fig. 3 is a multispectral dynamic modulation transfer function measurement mechanism of the present invention, comprises multispectral light source 1, multispectral edge of a knife graduation target plate 2, aspheric surface Cassegrain's parallel light tube 11 and tested photo electric imaging system 7, shaking table 4, vibrating controller 5 and computing machine 6; Wherein tested photo electric imaging system 7 is fixed on the shaking table 4, and tested photo electric imaging system 7 and computing machine 6 are connected by data line; Wherein multispectral edge of a knife graduation target plate 2 adopts multispectral light source 1 illumination, and tested photo electric imaging system 7 is the little MVC930DAM-GE30 of looking type CCD, and Pixel Dimensions is 4.65 * 4.65 μ m, and resolution is 1024 * 1024.
Multispectral edge of a knife graduation target plate 2 can use at visible light and infrared band, multispectral edge of a knife graduation target plate 2 comprises double-layer structure, wherein ZnS substrate 8 can be plated on ZnS substrate 8 edge of a knife graduation zone in addition by the Guang ， Chrome thin layer 9 of transmission from the visible light to the long wave infrared region.
Multispectral edge of a knife graduation target plate 2 can be done translation motion, also can rotate.
Aspheric surface Cassegrain's parallel light tube 11 can collimate to visible and infrared beam simultaneously.
Because aspheric surface Cassegrain parallel light tube 11 collimates by twice reflection, so place multispectral edge of a knife graduation target plate 2, aspheric surface Cassegrain's parallel light tube 11 and tested photo electric imaging system 7 successively along the light ray propagation direction, wherein the entrance pupil center of the emergent pupil center of aspheric surface Cassegrain parallel light tube 11 and tested photo electric imaging system 7 overlaps.
Shaking table 4 can drive tested photo electric imaging system 7 and do regular motion or random motion.
The concrete course of work of apparatus of the present invention is as follows
Make multispectral edge of a knife graduation target plate 2 and shaking table 4 static, be 10ms the integral time of choosing tested photo electric imaging system 7, the imaging on tested photo electric imaging system 7 of multispectral edge of a knife graduation target plate 2, the image that tested photo electric imaging system 7 obtains obtains static modulation transfer function MTF through after the Computer Processing
iAs shown in Figure 4;
Make multispectral edge of a knife graduation target plate 2 static, do the one dimension simple harmonic motion of frequency 20HZ amplitude 0.5mm by vibrating controller 5 control shaking tables 4, its direction of motion is vertical with optical axis, trigger 7 pairs of edge of a knife imagings of tested photo electric imaging system when the motion zero crossing, the image that tested photo electric imaging system 7 obtains is through obtaining the whole modulation transfer function MTF of dynamic photoelectric imaging system after the Computer Processing
eAs shown in Figure 5;
The whole modulation transfer function MTF of the dynamic photoelectric imaging system that step 2 is obtained
eThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic photoelectric imaging system modulation transfer function DMTF that is asked
e, as formula 2. shown in.
Measuring method of the present invention can also be in a simple harmonic motion cycle T five is different constantly 0, T/4, T/2,3T/4, T, 2 imagings of 7 pairs of multispectral edge of a knife graduation target plates of tested photo electric imaging system, obtain five dynamic photoelectric imaging system modulation transfer function curves, each bar curve is got the value at its 1/4 nyquist frequency place, and connect in chronological order and can obtain dynamic photoelectric imaging system modulation transfer function curve time response as shown in Figure 7.
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood that to have limited the scope of the invention; protection scope of the present invention is limited by the claims of enclosing, and any change on claim of the present invention basis all is protection scope of the present invention.
Claims (8)
1. the multispectral dynamic modulation transfer function measuring method is characterized in that this method comprises the following steps:
Step 1, static measurement
Make multispectral edge of a knife graduation target plate (2) and shaking table (4) static, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains obtains static modulation transfer function MTF through after the Computer Processing
i
Step 2, kinetic measurement comprise following three kinds of modes, and can select one or both or three kinds of measurements according to testing requirement
(a) make multispectral edge of a knife graduation target plate (2) motion, shaking table (4) is static, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains is through obtaining the whole modulation transfer function MTF of dynamic object after the Computer Processing
o
(b) make multispectral edge of a knife graduation target plate (2) static, shaking table (4) vibration, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains is through obtaining the whole modulation transfer function MTF of dynamic photoelectric imaging system after the Computer Processing
e
(c) make multispectral edge of a knife graduation target plate (2) motion, shaking table (4) vibration, multispectral edge of a knife graduation target plate (2) is gone up imaging at tested photo electric imaging system (7), and the image that tested photo electric imaging system (7) obtains is through obtaining the whole modulation transfer function MTF of dynamic object and dynamic photoelectric imaging system after the Computer Processing
s
Step 3, calculating
(d) the whole modulation transfer function MTF of the dynamic object that (a) in the step 2 is obtained
oThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic target modulation transfer function asked, as formula 1. shown in:
(e) the whole modulation transfer function MTF of the dynamic photoelectric imaging system that (b) in the step 2 is obtained
eThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic photoelectric imaging system modulation transfer function DMTF that is asked
e, as formula 2. shown in;
(f) the whole modulation transfer function MTF of dynamic object that (c) in the step 2 obtained and dynamic photoelectric imaging system
sThe static modulation transfer function MTF that obtains with step 1
iBe divided by in the place in respective frequencies, obtains the dynamic object and the dynamic photoelectric imaging system modulation transfer function DMTF that are asked
s, as formula 3. shown in:
2. according to the measuring method of right 1 described multispectral dynamic modulation transfer function, it is characterized in that, can also measure different many dynamic target modulation transfer function curves constantly, get the value at each bar curve characteristic frequency place, and connection can obtain dynamic target modulation transfer function curve time response in chronological order.
3. according to the measuring method of right 1 described multispectral dynamic modulation transfer function, it is characterized in that, can also measure different many dynamic photoelectric imaging system modulation transfer function curves constantly, get the value at each bar curve characteristic frequency place, and connection can obtain dynamic photoelectric imaging system modulation transfer function curve time response in chronological order.
4. according to the measuring method of right 1 described multispectral dynamic modulation transfer function, it is characterized in that, can also measure different many dynamic objects and dynamic photoelectric imaging system modulation transfer function curves constantly, get the value at each bar curve characteristic frequency place, and connection can obtain dynamic object and dynamic photoelectric imaging system modulation transfer function curve time response in chronological order.
5. the measurement mechanism of a multispectral dynamic modulation transfer function, comprise computing machine (6), it is characterized in that also comprising multispectral edge of a knife graduation target plate (2), colimated light system (3), shaking table (4), wherein tested photo electric imaging system (7) is fixed on the shaking table (4), and tested photo electric imaging system (7) is connected by data line with computing machine (6).
6. according to the measurement mechanism of right 5 described multispectral dynamic modulation transfer functions, multispectral edge of a knife graduation target plate (2) can be done translation motion, it is characterized in that: multispectral edge of a knife graduation target plate (2) also can rotate.
7. according to the measurement mechanism of right 5 described multispectral dynamic modulation transfer functions, it is characterized in that: colimated light system (3) can collimate to visible and infrared beam simultaneously.
8. according to the measurement mechanism of right 5 described multispectral dynamic modulation transfer functions, it is characterized in that: according to the different structure of colimated light system (3), along the light ray propagation direction, multispectral edge of a knife graduation target plate (2) and colimated light system (3) be can place successively, colimated light system (3) and multispectral edge of a knife graduation target plate (2) also can be placed successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237436A CN101718620A (en) | 2009-11-06 | 2009-11-06 | Method and device for measuring multispectral dynamic modulation transfer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237436A CN101718620A (en) | 2009-11-06 | 2009-11-06 | Method and device for measuring multispectral dynamic modulation transfer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101718620A true CN101718620A (en) | 2010-06-02 |
Family
ID=42433226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910237436A Pending CN101718620A (en) | 2009-11-06 | 2009-11-06 | Method and device for measuring multispectral dynamic modulation transfer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101718620A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893509A (en) * | 2010-07-14 | 2010-11-24 | 苏州大学 | Device and method for measuring modulation transfer function of large-numerical aperture micro objective |
| CN101949769A (en) * | 2010-08-13 | 2011-01-19 | 哈尔滨工业大学 | Dynamic image modulation transfer function measuring device |
| CN102607816A (en) * | 2012-03-17 | 2012-07-25 | 哈尔滨工业大学 | Method and device for measuring optical system lateral magnification by utilizing uniform-speed moving point target |
| CN102721530A (en) * | 2012-06-05 | 2012-10-10 | 中国电子科技集团公司第四十一研究所 | Double-edge scanning measurement method for infrared focal plane array (IRFPA) modulation transfer function (MTF) and device thereof |
| CN103217272A (en) * | 2013-03-04 | 2013-07-24 | 中国科学院长春光学精密机械与物理研究所 | Method for imaging quality degradation amount of photoelectric platform in motion by using optical transfer function |
| CN104360476A (en) * | 2014-12-11 | 2015-02-18 | 哈尔滨幻石科技发展有限公司 | Frequency and amplitude continuously adjustable image simple harmonic vibration device based on double column lenses |
| CN107462322A (en) * | 2017-08-16 | 2017-12-12 | 中国科学院合肥物质科学研究院 | A kind of detection of time varying signal frequency spectrum obtains system and method |
| CN109308722A (en) * | 2018-11-26 | 2019-02-05 | 陕西远航光电有限责任公司 | A kind of spatial pose measuring system and method based on active vision |
| CN111238778A (en) * | 2019-12-30 | 2020-06-05 | 重庆大学 | Imaging performance detection system for active healthy ophthalmologic image products |
| CN112880975A (en) * | 2021-01-14 | 2021-06-01 | 歌尔股份有限公司 | Modulation transfer function testing device |
| CN113556470A (en) * | 2021-09-18 | 2021-10-26 | 浙江宇视科技有限公司 | Lens focusing method and device, computer equipment and storage medium |
| CN116222969A (en) * | 2022-12-30 | 2023-06-06 | 中国科学院长春光学精密机械与物理研究所 | Dynamic line frequency matching simulation device in TDI CCD large attitude angle push broom imaging process |
-
2009
- 2009-11-06 CN CN200910237436A patent/CN101718620A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893509A (en) * | 2010-07-14 | 2010-11-24 | 苏州大学 | Device and method for measuring modulation transfer function of large-numerical aperture micro objective |
| CN101949769A (en) * | 2010-08-13 | 2011-01-19 | 哈尔滨工业大学 | Dynamic image modulation transfer function measuring device |
| CN101949769B (en) * | 2010-08-13 | 2012-01-11 | 哈尔滨工业大学 | Dynamic image modulation transfer function measuring device |
| CN102607816A (en) * | 2012-03-17 | 2012-07-25 | 哈尔滨工业大学 | Method and device for measuring optical system lateral magnification by utilizing uniform-speed moving point target |
| CN102607816B (en) * | 2012-03-17 | 2014-08-13 | 哈尔滨工业大学 | Method and device for measuring optical system lateral magnification by utilizing uniform-speed moving point target |
| CN102721530A (en) * | 2012-06-05 | 2012-10-10 | 中国电子科技集团公司第四十一研究所 | Double-edge scanning measurement method for infrared focal plane array (IRFPA) modulation transfer function (MTF) and device thereof |
| CN103217272A (en) * | 2013-03-04 | 2013-07-24 | 中国科学院长春光学精密机械与物理研究所 | Method for imaging quality degradation amount of photoelectric platform in motion by using optical transfer function |
| CN104360476B (en) * | 2014-12-11 | 2016-09-14 | 青岛橡胶谷知识产权有限公司 | Frequency and amplitudes based on twin columns lens continuously adjustable image simple harmonic oscillation device |
| CN104360476A (en) * | 2014-12-11 | 2015-02-18 | 哈尔滨幻石科技发展有限公司 | Frequency and amplitude continuously adjustable image simple harmonic vibration device based on double column lenses |
| CN107462322A (en) * | 2017-08-16 | 2017-12-12 | 中国科学院合肥物质科学研究院 | A kind of detection of time varying signal frequency spectrum obtains system and method |
| CN109308722A (en) * | 2018-11-26 | 2019-02-05 | 陕西远航光电有限责任公司 | A kind of spatial pose measuring system and method based on active vision |
| CN111238778A (en) * | 2019-12-30 | 2020-06-05 | 重庆大学 | Imaging performance detection system for active healthy ophthalmologic image products |
| CN112880975A (en) * | 2021-01-14 | 2021-06-01 | 歌尔股份有限公司 | Modulation transfer function testing device |
| CN112880975B (en) * | 2021-01-14 | 2023-01-24 | 歌尔股份有限公司 | Modulation transfer function testing device |
| CN113556470A (en) * | 2021-09-18 | 2021-10-26 | 浙江宇视科技有限公司 | Lens focusing method and device, computer equipment and storage medium |
| CN113556470B (en) * | 2021-09-18 | 2021-12-31 | 浙江宇视科技有限公司 | Lens focusing method and device, computer equipment and storage medium |
| CN116222969A (en) * | 2022-12-30 | 2023-06-06 | 中国科学院长春光学精密机械与物理研究所 | Dynamic line frequency matching simulation device in TDI CCD large attitude angle push broom imaging process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101718620A (en) | Method and device for measuring multispectral dynamic modulation transfer function | |
| CN101799318B (en) | Laser homodyne vibration detection optical system | |
| CN102735431B (en) | Method for measuring sight line stabilizing accuracy of photoelectric sight-stabilizing system | |
| CN104567738A (en) | System and method for precisely measuring optical axis parallelism | |
| CN102564731A (en) | Device for measuring focal length and wavefront distortion of lens | |
| Shi et al. | Volumetric calibration enhancements for single-camera light-field PIV | |
| CN203375949U (en) | High temperature adaptability infrared observation system optical axis parallelism and MRTD outdoor detection device | |
| CN103278143A (en) | Machine version-based zero position walking momentum testing device and machine vision-based zero position walking momentum testing method | |
| CN201983921U (en) | Measurement device of focal length and wave front distortion of lens | |
| CN106226759A (en) | A kind of tracking Stabilily parameter device and method | |
| CN102840964A (en) | Large-caliber long-focus collimator focal point real-time monitoring system | |
| Chu et al. | Research on target deviation measurement of projectile based on shadow imaging method in laser screen velocity measuring system | |
| CN203011419U (en) | An optical axis parallelism digital calibration instrument for multiple optical sensors | |
| CN105466576A (en) | Atmospheric turbulence height and angle anisoplanatism wavefront error synchronization measurement device and synchronization measurement method | |
| Frankovský et al. | Modal analysis using digital image correlation technique | |
| CN101294965A (en) | Miniature non-mark protein chip detecting system | |
| CN204269342U (en) | A kind of measurement mechanism of optical fiber image transmission beam both ends of the surface pixel side-play amount | |
| CN101762209A (en) | Zero detector of micro-opto product | |
| Martins et al. | Conception and development of an optical methodology applied to long-distance measurement of suspension bridges dynamic displacement | |
| Wang et al. | A novel in-plane displacement signal generation technique for testing the measurement accuracy of vision-based displacement system | |
| CN211669359U (en) | Long-focus laser three-dimensional imager distortion testing device based on angle measurement method | |
| CN114593725A (en) | Tracking precision testing device and method for photoelectric tracker | |
| CN112504164A (en) | Measuring device and method capable of dynamically measuring surface shape of planar optical element | |
| CN103217272A (en) | Method for imaging quality degradation amount of photoelectric platform in motion by using optical transfer function | |
| Monnier et al. | GPU-based simulation of optical propagation through turbulence for active and passive imaging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100602 |