CN207703459U - A kind of laser projection speckle measurement system - Google Patents
A kind of laser projection speckle measurement system Download PDFInfo
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- CN207703459U CN207703459U CN201721853752.8U CN201721853752U CN207703459U CN 207703459 U CN207703459 U CN 207703459U CN 201721853752 U CN201721853752 U CN 201721853752U CN 207703459 U CN207703459 U CN 207703459U
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Abstract
The utility model discloses a kind of laser projection speckle measurement systems, babinet including being internally provided with light source module and image measuring device, and the light source module and image measuring device are respectively by can be arranged in babinet the light source supporting mechanism and detector supporting mechanism that the position angle of light source module and image measuring device is adjusted；Light source module is made of laser light source and incoherent light source.In testing, hot spot is formed in the light projection to projection screen that the light source module or measured laser are sent out, further light spot image is imaged to realization on the test surface of image measuring device and is measured；Compared with traditional equipment, the present apparatus is innovatively integrated with laser light source, incoherent light source and image measuring device in babinet, and position angle alignment can be carried out by corresponding supporting mechanism, calibration and test function are realized in one, not only ensure that the accuracy of speckle measurement, and make measurement it is more convenient, be suitable for laboratory and in-site measurement.
Description
【Technical field】
The present invention relates to the technical fields that laser projection display measures, and in particular to a kind of laser projection speckle measurement system
System.
【Background technology】
With the rapid development of display technology, laser display becomes the display technology of a new generation by many advantages, dashes forward
It includes color domain coverage ratio height, high brightness, high contrast etc. to go out advantage, and as most promising display technology of new generation；Laser
The advantage of display is mainly derived from the use of laser light source, in other words, laser light source have good coherence, monochromaticjty,
Excitation purity is high, colour gamut is big；However, relative to optical maser wavelength, projection optical device or projection screen surface are coarse, and laser is by thick
Rough surface generates interference, and then occurs " speckle " phenomenon in projected picture, and the presence of speckle can not only seriously affect illumination light
The uniformity and picture quality of spot, but also visual fatigue can be caused.Therefore, expert has also been made largely about elimination or drop
A series of achievement in research has also been delivered in the research of low speckle.In terms of measurement, laser is thrown in the accurate measurement of laser speckle
Shadow shows that the evaluation of speckle degree is important to seeing, while being also the important means of verification dissipation spot technique effect；It usually adopts at present
Laser speckle degree is evaluated with speckle contrast.
Detection for laser speckle, relevant enterprise and expert also proposed some solutions in the industry；Such as Publication No.
The patent of CN201520785210 discloses a kind of measuring system of the laser image speckle based on human eye feature, and main includes swashing
Light, imaging lens, sensing element, and by using with human eye through-hole, the matched imaging lens of focal length and the light for matching retina
The photosensitive element of strong response curve simulates perception of the human eye for speckle effect, and then realizes that speckle measures；Furthermore day
The patented technology that the disclosure number is JP 2014-32371A discloses a kind of laser speckle generator and speckle assessment system, mainly
Including laser light source, diffusing panel, and by driving diffusing panel mobile and changing laser beam phase, generate different types of dissipate
Spot, and by speckle measurement apparatus measures speckle contrast, wherein speckle measurement instrument includes pinhole diaphragm, imaging induction member
Part, imaging lens.
From the foregoing, it may only be realized in existing detection technique and measuring device for laser projection speckle scattered
The measurement of spot contrast can not achieve the field calibration function of equipment speckle contrast；If will be to conventional laser speckle mesure
Technology carries out speckle contrast calibration, then needs to provide suitable place, light source chucking device, regulation light source, measuring apparatus peace
Assembling device etc. is calibrated, and not only process is cumbersome, equipment and venue cost are relatively high, can be due to other light in environment toward contact
Source enters in measuring apparatus from the reflected light with metope etc. and causes to generate larger stray light, influences the accurate of result
Degree；Being widely used during laser speckle measuring technology measures at the scene in addition is general, such as cinema, meeting room place, is surveying
Realize the quickly calibrated for ensureing that the accuracy measured shows important especially of equipment in amount scene.
【Invention content】
In view of the deficiencies of the prior art, technical problem to be solved by the invention is to provide a kind of laser projection speckle measurements
By Integration Design the speckle characteristics of laser-projector and screen to be measured not only may be implemented, but also can be right at any time in system
The speckle characteristics value (such as speckle contrast) of measuring device is calibrated, and height ensures and improve that the measurement of speckle contrast is accurate
Degree realizes the objective science evaluation of measurand.The present apparatus can realize calibration and laser-projector, the projection of speckle contrast
The speckle contrast of screen measures.
The invention is realized by the following technical scheme：A kind of laser projection speckle measurement system, which is characterized in that including：
It is internally provided with the babinet of light source module and image measuring device；Wherein the light source module is by laser light source and incoherent light source
Composition, and the light source module passes through the position angle of laser light source and/or incoherent light source can be adjusted light source
Supporting mechanism is connect with babinet；The image measuring device includes optical image unit and 2-dimensional array detector；In babinet
Projection screen is set outside interior or babinet, the light projection that the light source module or measured laser are sent out forms hot spot figure on projection screen
Picture, the image measuring device is directed at hot spot, and hot spot is imaged onto on 2-dimensional array detector by optical image unit.
Laser light source and incoherent light source have been integrated in test device babinet by apparatus of the present invention in innovative, are sharp
The calibration and test of light speckle parameters provide necessary light source, and are automatically controlled by manually or mechanically control device sharp
The switching of the position angle of electro-optical device and incoherent light source in input path is adjusted so that the light of incident beam on the screen
Spot is full of test zone, and is simultaneously filled with the field range of image measuring device；The light path of the present apparatus is realized：Light source die
The light that block or measured light are sent out forms hot spot by being projected to projection screen surface, and further light spot image is surveyed by imaging
It measures and is ultimately imaged after the optical image unit of device to measuring on the test surface of image measuring device.It is previously mentioned in the present apparatus
Projection screen can be canonical reference screen (such as standard diffuse reflecting screen), or projection screen to be measured；And it can be according to reality
Border needs canonical reference screen being arranged in box house or outside.Calibration with regard to laser speckle test equipment and test work(below
It can describe in detail：
Calibration function：The calibration of the present apparatus is mainly by respectively by the laser light source and incoherent light source inside device box
It is cut into input path successively, and incident light is projected on projection screen and forms hot spot, light spot image is further across aperture
It measures to obtain highest and lowest speckle contrast on imaging to the test surface of image measuring device after diaphragm, and according to reason
The speckle contrast thought calibrates measured value.
Usually, the projection screen used when calibration for standard diffuse reflecting screen, and using laser irradiation standard diffuse reflecting screen when
Speckle contrast value ideal value be 1, the speckle contrast measured after calibration should be not less than 0.97；It is irradiated using incoherent light source
The ideal value of speckle contrast when standard diffuse reflecting screen is 0, and the speckle contrast measured after calibration, which should be worth, should be not higher than 0.02；
Test function：For having completed the measuring device of calibration, then can be used to measurand (including laser, laser
Projecting apparatus, projection screen etc.) speckle measure.It specifically, can be by equipment when the speckle to laser-projector measures
Light supply apparatus built in babinet cuts out light path, so that the incident beam of laser-projector is radiated on projection screen and forms light
Spot further measures speckle by image measuring device；When being measured to the speckle for being tested projection screen, then may be used
Form speckle by the way that the laser in light supply apparatus to be cut into input path on third contact of a total solar or lunar eclipse beam to tested screen of setting out, so by
As measuring device measures speckle.
Compared with conventional laser speckle contrast test equipment, measuring device of the present invention is integrated with laser light source in a device
And incoherent light source, the calibration function of speckle contrast can be easily completed, in laboratory and live laser speckle measurement
Occasion can be applicable in, and have the characteristics that simple operation, at low cost, powerful and accuracy of measurement are high, ensure that scattered
The accuracy of spot feature measurement and evaluation, for instructing progress laser speckle correlative study in the industry to provide technical support.
The present invention can further limit and perfect by the following technical programs：
As a kind of technical solution, the image measuring device includes the phase for making each pixel in 2-dimensional array detector
The colour filter to match to spectral responsivity and human eye luminous efficiency function；The spectral response of the i.e. described image measuring device with
Human eye luminous efficiency function matches.The speckle image arrived due to eye-observation is in addition to can be by the shadow of display equipment optical system
Also related with the optical imagery of human eye and photosensitive mechanism outside ringing, especially colored speckle, the luminous efficiency of human eye becomes with wavelength
Change, therefore tradition simply can not often characterize human eye to speckle pattern using the method that camera replaces human eye to carry out speckle image acquisition
The true perception of picture, therefore, the imaging device that this programme is matched using spectral response curve with human eye luminous efficiency function can
More intuitively to embody perception of the human eye to speckle image.Preferably, the image measuring device is imaging brightness meter.
Preferably, the position of the image measuring device in said program meets：The central axis of image measuring device with
The asymmetric setting of normal of light source module or the transmitting beam center axis of measured laser relative to projection screen.Image measuring device
The purpose of central axis and incident beam central axis asymmetric design be that the specular light of incident light is avoided to be tied to measuring
The influence of fruit, the characteristic that more objectively reflection measurand itself generates speckle.
As a kind of technical solution, the babinet is equipped with babinet and is equipped with for the light of measured laser to be introduced babinet
Interior light inlet and/or the thief hatch for acquired projections screen surfaces signal.Being arranged in the babinet of measuring device in this programme will
The light of measured laser introduces the light inlet of box house and/or the thief hatch for acquired projections screen surfaces signal, Jin Erke
It is tested with the speckle characteristics of laser-projector, laser light source or projection screen；Specifically corresponding three kinds of embodiments, respectively：
When babinet is equipped with light inlet and thief hatch simultaneously, then this equipment has both laser projection and the speckle of projection screen is special
Property test；
When babinet only has light inlet, then this equipment is only for the speckle measurement for laser projection；
When babinet only has thief hatch, then this equipment is measured only for the speckle correlation properties of standby projection screen.
It is equipped with preferably, the babinet is equipped with babinet for entering light in the light leading-in box body by measured laser
Mouthful and for acquired projections screen surfaces signal thief hatch.
It further include a standard diffuse reflecting screen as a kind of embodiment of said program, and the standard diffusing reflection
Screen is integrally disposed in outside babinet；When portion outside the enclosure is arranged in standard diffuse reflecting screen, laser throwing is being calibrated or carried out
When the measurement of shadow instrument, it is only necessary to which standard diffuse reflecting screen is placed at the thief hatch of babinet；
Further include a standard diffuse reflecting screen, and standard diffuse reflecting screen is arranged as a kind of embodiment of said program
In box house, and it can cut or cut out from light path.In the present solution, standard diffuse reflecting screen is integrated in laser speckle measurement dress
Set inside, the transmitting light beam of light source module or laser to be measured, laser projection device, which is projected in standard diffuse reflecting screen, to be formed
Speckle image, and speckle image receive and measure speckle image by image measuring device；And work as measurement object
Not instead of laser light source or laser projection device when projection screen, then can cut out standard diffuse reflecting screen from light path, and
Screen to be measured is placed at corresponding position, at this point, the transmitting light beam of light source module, which is projected on screen to be measured, forms speckle pattern
Picture, and speckle image receive and measure speckle image by image measuring device.
The use of said program Plays diffuse reflecting screen is since standard diffuse reflecting screen has the scattering for being similar to lambert's body
Characteristic, can calibrate for the speckle contrast of equipment and the speckle contrast measurement of laser-projector provides a reference standard,
And then ensure the objectivity compared between different projection device speckle comparison degree；
As a kind of technical solution, in opened condition in test, and the image measuring device is logical for the babinet
The adjustable detector supporting mechanism in position is crossed to connect with babinet.Babinet in this programme is openable case, in actual test
When babinet in opened condition, and the optical system of the compositions such as light source module and image measuring device is showed or bullet
Go out, hold up or extracts out；It is possible to further by manual or machine automatization mode adjust light source module, projection screen and at
As the position of measuring device, and then realize alignment.In the present solution, the image measuring device is supported by adjustable detector
Mechanism is connect with babinet, can either manually or automatically mode be adjusted in turn in fact to detector supporting mechanism in test
The position angle of existing image measuring device is adjusted；So that image measuring device is accurately aimed at the hot spot figure of projection screen surface
Picture.
Further include aperture diaphragm as a kind of technical solution, the aperture diaphragm is arranged in image measuring device, position
In light path in light path before optical image unit or between optical image unit and 2-dimensional array detector；Or institute
The aperture diaphragm stated is relatively independent, in the optical path between projection screen and image measuring device.Aperture light is set
The purpose of door screen is that limitation enters light quantity into image measuring device；Preferably, the pore size of the aperture diaphragm
Simulate the size of pupil of human.
As a kind of embodiment of said program, the light before optical image unit is directly arranged in the aperture diaphragm
On road or the light path between optical image unit and 2-dimensional array detector；I.e. aperture diaphragm can be to be arranged in imaging measurement
The inside of device；Preferably, the aperture diaphragm for entering light diaphragm and being described of the image measuring device；
As a kind of embodiment of said program, the aperture diaphragm be it is relatively independent, be located at projection screen and at
As in the optical path between measuring device.
As a kind of technical solution, the aperture diaphragm includes the different replaceable light of two or more pore sizes
Door screen or the aperture diaphragm are the adjustable diaphragms that pore size can be adjusted.
As a kind of embodiment of said program, i.e., the aperture diaphragm is different by one or more pore size
Diaphragm constitute, and the diaphragm can according to it is different measurement need to switch in light path.The size of diaphragm compares speckle
The measurement result of degree has direct influence, passes through the different light of not same or more pore size of setting in the technical program
Door screen, and then switched to pore size suitable diaphragm in the light path between screen and image measuring device according to testing requirement.
Preferably, the aperture diaphragm size is similar to the size of pupil of human, it is 3-4mm；And then can be more interchangeable mould
Perception of the anthropomorphic eye to speckle image.
As a kind of embodiment of said program, the pore size of the aperture diaphragm can be adjusted；That is aperture light
The pore size of door screen may be implemented to be continuously adjusted, and then be suitably sized, and then screen by aperture adjustment according to testing requirement
The speckle image of upper formation is received by aperture diaphragm by image measuring device；Preferably, the aperture ruler of aperture diaphragm
Very little is that 3-4mm is adjustable.
As a kind of technical solution, the incoherent light source is incandescent lamp or white light LEDs.Incandescent lamp, white light LEDs are
Incoherent light source can generate minimum speckle contrast, can be used for the calibration of minimum speckle contrast；
Preferably, collimating mirror is set in said program between incoherent light source and projection screen, the light source module
Or the light that sends out of measured light after collimating mirror uniform irradiation on the surface of projection screen；The purpose of collimating mirror is so that incident
Light uniform irradiation is to projection screen surface.
As a kind of technical solution, the laser light source is single mode, linear polarization He-Ne laser.Single mode, linear polarization He-Ne
Laser has the coherence of height, monochromaticjty, can generate highest speckle contrast, can be used for the school of highest speckle contrast
It is accurate；It can also be used as transmitting light source when tested screen speckle feature measurement simultaneously.
As a preferred embodiment of the above technical solution, beam expanding lens, institute are additionally provided in the light path between laser light source and projection screen
The laser light source stated after expanding by being radiated at projection screen surface.Since the beam emissions angle of laser light source is relatively small, it is
So that forming the uniform light spots of enough size on projection screen, then beam expanding lens is set after laser light source, so that it is generated uniform
Hot spot and the measurement visual field for being full of imaging luminance measuring device.
As a kind of technical solution, the laser light source and incoherent light source are arranged at an arbitrary position, and can be on demand
Specified light source position is switched to successively；Corresponding light source can be switched to by manually or mechanically control device when measuring specified
Incident light position.Preferably, laser light source and incoherent light source are placed side by side, and lighted respectively by switch；Light supply apparatus
In laser light source and incoherent light source can place side by side, only control it respectively by switch when in use and light successively just
It can.
As a kind of technical solution, in light of the light source emitter (light source module or measured laser instrument) between projection screen
Road setting optical filter, filters out the stray light other than non-targeted spectral coverage；The optical filter can be positioned over speckle measurement device
Inside can also be placed on outside speckle measurement device；Preferably, the optical filter is set to speckle measurement device box
In addition, it and is selected and is replaced to use different optical filters according to different measurement objects.
As a kind of technical solution, polarization is set in the light path between the projection screen and optical imaging measuring device
Piece, and institute's polarizing film can be cut or cut out from light path.Then polarizing film is cut when emitting light source and being laser in this programme
Into the light path between projection screen and optical imaging measuring device；Since most of laser is polarised light, in projection screen and
The purpose that polarizing film is directly arranged in optical imaging measuring device is to make polarization direction and the polarization of laser by adjusting polarizing film
The plane of polarization of piece is consistent, obtains maximum speckle contrast to generate, is only used when incident light source is coherent source；When entering
Penetrate light source be incoherent light source when, polarizing film can be cut out light path.
Further include mechanical actuation device as a kind of technical solution；The mechanical actuation device is used for controlling light source die
Block, the position adjusting of image measuring device, aperture diaphragm switching and pore size adjusting and the adjustment etc. of polarizing film.
Further include data processing module as a kind of technical solution, the data processing module can be integrated in imaging and survey
It measures on device, it also can be in host computer, such as computer.Data processing module mainly realize image measuring device is acquired it is scattered
The analysis of spot image obtains speckle characteristics parameter, such as speckle contrast.
【Description of the drawings】
Attached drawing 1 is apparatus of the present invention schematic diagram in embodiment 1；
Attached drawing 2 is schematic diagram of the present invention when the speckle contrast of screen to be measured measures in embodiment 1；
Attached drawing 3 is schematic diagram of the present invention when laser-projector speckle contrast measures in embodiment 1；
Attached drawing 4 is the schematic cross-section that 1 laser-projector of embodiment projects that the speckle image to be formed measures；
Attached drawing 5 is apparatus of the present invention schematic diagram in embodiment 2；
Attached drawing 6 is apparatus of the present invention schematic diagram in embodiment 3；
Attached drawing 7 is apparatus of the present invention schematic diagram in embodiment 4；
Attached drawing 8 is schematic diagram of the present invention when the speckle contrast of screen to be measured measures in embodiment 4；
Attached drawing 9 is schematic diagram of the present invention when laser-projector speckle contrast measures in embodiment 4；
Attached drawing 10 is apparatus of the present invention schematic diagram in embodiment 5；
Attached drawing 11 is schematic device of the apparatus of the present invention in test in embodiment 6；
Babinet -1；Light inlet -1-1；Thief hatch -1-2；Light source module -2；Laser light source -2-1；Incoherent light
Source -2-2；Image measuring device -3；Optical image unit -3-1；2-dimensional array detector -3-2；Light source supporting mechanism-
4-1；Detector supporting mechanism -4-2；Projection screen -5；Standard diffuse reflecting screen -5-1；Tested screen -5-2；Aperture diaphragm -6；
Collimating mirror -7；Beam expanding lens -8；Polarizing film -9；Optical filter -10；
【Specific implementation mode】
Embodiment 1
As Fig. 1,2,3 disclose a kind of laser speckle measurement device, including babinet 1, and set on babinet 1 that there are one be used for
The light of measured laser is introduced into light inlet 1-1 inside measuring device and for the thief hatch of 2 surface signal of acquired projections screen
1-2 is internally provided with light source module 2, transportable standard diffuse reflecting screen 5-1 and image measuring device 3 in babinet 1；It is described
Light source module 2 and image measuring device 3 respectively by light source supporting mechanism 4-1 and detector supporting mechanism 4-2 be mounted on case
It (is not drawn into figure) in body 1, and wherein the position angle of light source module 2 and image measuring device 3 can pass through corresponding support
Mechanism is adjusted；The light source module 2 is made of laser light source 2-1, incoherent light source 2-2, the laser light source 2-1 and
Incoherent light source 2-2 spatially close-packed arrays, when laser light source 2-1 and incoherent light source 2-2 provides lighting condition, it is only necessary to
It lights respectively；It can be by machine control unit and light source die when the light source module 2 for not needing box house provides illumination
Block 2 cuts out light path；It is equipped with the 9, pore sizes of polarizing film that can be switched in and out from light path successively on optical path
Adjustable aperture diaphragm 6 and image measuring device 3, the light sent out by laser light source 2-1 or measured laser instrument is through entering
It penetrates light path and is projected on projection screen 5 and form hot spot, light spot image is surveyed further across after polarizing film 9 and aperture diaphragm 6 by imaging
Amount device 3 is received and is measured；When in the incoherent light source 2-2 incision light paths in light source module 2, by polarizing film 9 from light path
It cuts out；It should be pointed out that foregoing projection screen can be standard diffuse reflecting screen 5-1, or tested screen 5-2；And this dress
Laser light source 2-1, incoherent light source 2-2, standard diffuse reflecting screen 5-1, polarizing film 9 in setting and image measuring device 3
Position adjustment is realized to be switched over by machine control unit and be moved；Machine control unit also controls aperture diaphragm 6 simultaneously
Pore size is adjusted；Laser light source 2-1 in the present apparatus be single mode, linear polarization He-Ne lasers, incoherent light source 2-2 is
White light LEDs, and the pore size of aperture diaphragm 6 can continuously adjust in 3-4mm；The support device 4 is holder；Imaging is surveyed
Amount device 3 is imaging brightness meter.
The present apparatus may be implemented speckle and be surveyed to the speckle characteristics of the calibration of comparison and laser-projector and projection screen
Amount, describes in detail with regard to the realization process of three kinds of functions individually below.
Calibration process is：Laser light source 2-1 is lighted first, and transmitting light transmission to the surfaces standard diffuse reflecting screen 5-1 are formed
Speckle image, the surfaces standard diffuse reflecting screen 5-1 formed speckle image further after polarizing film 9 and aperture diaphragm 6 by
Imaging to measuring on the test surface of image measuring device 3, in the process can by the direction of rotatory polarization piece 9 with swash
The polarization direction of radiant 2-1 is consistent, and obtains maximum speckle contrast by the size of adjustment aperture diaphragm 6, and requires
The speckle contrast of acquisition is more than 0.97；Further, turn off laser light source 2-1, light incoherent light source 2-2, and will polarization
Piece 9 is cut out from light path, and the incoherent light that incoherent light source 2-2 is sent out is projected to the surfaces standard diffuse reflecting screen 2-1 and forms hot spot
Image is finally obtained by image measuring device 3 and measures to obtain minimum speckle contrast, and requires the speckle contrast obtained
Less than 0.02.
The speckle contrast of screen to be measured measures：Standard diffuse reflecting screen 5-1 is cut out from light path, and in thief hatch 1-2
It sets place's setting and is tested projection screen 5-2 (such as Fig. 2), by laser light source 2-1 incision light paths and light, the transmitting light of laser light source 2-1
Beam is projected at tested screen 5-2 and forms hot spot, and then light spot image after aperture diaphragm 6 by image measuring device 3 by being measured
It arrives.
The speckle contrast measurement process of laser-projector：Light source module 2 is cut out into (Fig. 2) from input path, at this point,
Testing laser projecting apparatus is placed near the light inlet 1-1 of babinet 1, and between testing laser projecting apparatus and light inlet 1-1
Optical filter 10 is arranged to be used for removing the stray light other than target spectral coverage, the incident light of testing laser projecting apparatus is by entering light in measurement
Mouth 1-1 enters inside babinet 1, and is projected to the surfaces standard diffuse reflecting screen 5-1 with assigned direction and forms hot spot, and then speckle image
By being measured by image measuring device 3 after aperture diaphragm 6 and analyzing to obtain speckle contrast.
Embodiment 2
As shown in figure 5, present embodiment discloses a kind of laser speckle measurement device, unique difference with embodiment 1
It is, a light inlet 1-1 is provided only in present apparatus middle case 1, there is no thief hatch 1-2 is arranged；Remaining setting and embodiment 1
It is consistent；The self calibration of speckle contrast and the speckle measurement of laser projection device may be implemented in the present apparatus, is not suitable for
The speckle characteristics of projection screen measure；The calibration method of speckle contrast and the speckle measurement method of laser projection device and implementation
Example 1 is consistent.
Embodiment 3
As shown in fig. 6, present embodiment discloses a kind of laser speckle measurement devices, difference from example 1 is that,
A thief hatch 1-2 is provided only in present apparatus middle case 1, there is no light inlet 1-1 is arranged；And in light source module 2 and projection screen 5
Between be equipped with beam expanding lens 8 and collimating mirror 7 successively, remaining setting is consistent with embodiment 1；The present apparatus is in test, light source die
The light that block 2 or tested laser-projector are sent out first passes around beam expanding lens 8 and expands, and then collimated mirror 7 becomes collimated light
Line is incident upon 5 surface of projection screen later；
The calibration of speckle contrast may be implemented in the present apparatus and the speckle characteristics of projection screen measure, and is not suitable for laser throwing
The speckle measurement of image device；The calibration method of speckle contrast and the speckle characteristics measurement method of projection screen and 1 class of embodiment
Seemingly.
Embodiment 4
As shown in Fig. 7,8,9, present embodiment discloses a kind of laser speckle measurement devices, as different from Example 1, this
There is no be integrated by standard diffuse reflecting screen 5-1 for 1 inside of device middle case；Remaining is arranged unanimously with embodiment 1；The present apparatus exists
When the speckle measurement of calibration process and laser-projector, it is only necessary to which standard diffuse reflecting screen 5-1 is placed at thief hatch 1-2；
And only need tested screen being placed at thief hatch 1-2 when the speckle characteristics of projection screen measure, specific calibration process and
Measurement process is consistent with embodiment 1.
Embodiment 5
As described in Figure 10, present embodiment discloses a kind of laser speckle measurement device, exist with the difference of embodiment 1
In the aperture diaphragm 6 of the present apparatus is made of two pore sizes different diaphragm 6-1 and diaphragm 6-2, wherein the hole of diaphragm 6-1
Diameter size is 3mm, and the pore size of diaphragm 6-2 is 4mm, and measures needs according to practical, can be by selection diaphragm 6-1 or diaphragm
6-2 is cut in light path；Remaining is same as Example 1.
Embodiment 6
As shown in figure 11, present embodiment discloses a kind of laser measuring device for measuring, the present apparatus includes babinet 1, and in babinet 1
The optical system being made of light source module 2 and image measuring device 3 is set, and the light source module 2 is by laser light source 2-1 and non-
Coherent source 2-2 compositions, and be mounted in babinet 1 by light source support device 4-1 holders, it is in spatially to be disposed proximate to；And swash
Radiant 2-1 is single mode linear polarization He-Ne laser, and incoherent light source 2-2 is LED light source；3 front of the image measuring device
Equipped with adjustable aperture diaphragm 6, and the image measuring device 3 is imaging brightness meter；The light source module 2 emits light beam to throwing
Hot spot is formed on shadow screen 5 (standard diffuse reflecting screen 5-1 or tested screen 5-2)；Hot spot is filled after aperture diaphragm 6 by imaging measurement
Set 3 receptions measurement；In actual test, 1 state to be opened of babinet of the present apparatus, and light source module 2 and imaging measurement will be equipped with
The optical system that 3 groups of device holds out top set automatically, and then light can be reasonably adjusted by machine control unit in actual test
Source and the position of imaging brightness meter, angle, distance；Specific test process is similar to Example 1.
Claims (10)
1. a kind of laser projection speckle measurement system, which is characterized in that including：It is internally provided with light source module (2) and imaging measurement
The babinet (1) of device (3)；Wherein the light source module (2) is made of laser light source (2-1) and incoherent light source (2-2), and
The light source module (2) is by can be adjusted the position angle of laser light source (2-1) and/or incoherent light source (2-2)
Light source supporting mechanism (4-1) connect with babinet (1)；The image measuring device (3) include optical image unit (3-1) and
2-dimensional array detector (3-2)；In babinet (1) or projection screen (5), the light source module (2) or tested is arranged in babinet (1) outside
The light projection that laser is sent out forms hot spot on projection screen (5), and the image measuring device (3) is directed at hot spot, and passes through light
It learns imaging unit (3-1) hot spot is imaged onto on 2-dimensional array detector (3-2).
2. laser projection speckle measurement system as described in claim 1, which is characterized in that the image measuring device (3)
Include that the relative spectral response of each pixel in 2-dimensional array detector (3-2) is made to match with human eye luminous efficiency function
Colour filter.
3. laser projection speckle measurement system as claimed in claim 1 or 2, which is characterized in that the babinet (1) is equipped with
Light inlet (1-1) for introducing the light of measured laser in babinet (1) and adopting for acquired projections screen (5) surface signal
Sample mouth (1-2).
4. laser projection speckle measurement system as claimed in claim 3, which is characterized in that further include a standard diffuse reflecting screen
(5-1), and the standard diffuse reflecting screen (5-1) is integrally disposed in babinet (1) inside, and can cut or cut out from light path.
5. laser projection speckle measurement system as claimed in claim 1 or 2, which is characterized in that the babinet (1) is being tested
When in opened condition, and the image measuring device (3) passes through the adjustable detector supporting mechanism (4-2) in position and babinet
(1) it connects.
6. laser projection speckle measurement system as described in claim 1, which is characterized in that further include aperture diaphragm (6), it is described
Aperture diaphragm (6) be arranged in image measuring device (3), be located at optical image unit (3-1) before light path on or light
It learns in the light path between imaging unit (3-1) and 2-dimensional array detector (3-2)；Or the aperture diaphragm (6) is opposite
It is independent, in the optical path between projection screen (5) and image measuring device (3).
7. laser projection speckle measurement system as claimed in claim 6, which is characterized in that the aperture diaphragm (6) includes
The different replaceable diaphragm of two or more pore sizes；Or to be pore size can be adjusted the aperture diaphragm (6)
Adjustable diaphragm.
8. laser projection speckle measurement system as described in claim 1, which is characterized in that in the incoherent light source (2-
2) collimating mirror (7) is equipped in the light path between projection screen (5).
9. the laser projection speckle measurement system as described in any in claim 1,2,4,6 or 7, which is characterized in that in laser
Beam expanding lens (8) is set in the light path between light source (2-1) and projection screen (5), and the laser light source (2-1) passes through beam expanding lens
(8) projection screen (5) surface is radiated at after expanding.
10. laser projection speckle measurement system as described in claim 1, which is characterized in that in the projection screen (5) and light
It learns and is equipped with polarizing film (9) in the light path between image measuring device (3), and institute's polarizing film (9) can be cut or cut from light path
Go out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721853752.8U CN207703459U (en) | 2017-12-27 | 2017-12-27 | A kind of laser projection speckle measurement system |
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| CN201721853752.8U CN207703459U (en) | 2017-12-27 | 2017-12-27 | A kind of laser projection speckle measurement system |
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| CN207703459U true CN207703459U (en) | 2018-08-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007677A (en) * | 2017-12-27 | 2018-05-08 | 杭州远方光电信息股份有限公司 | A kind of laser projection speckle measurement system |
| CN110132544A (en) * | 2019-04-19 | 2019-08-16 | 深圳奥比中光科技有限公司 | A kind of optical test equipment |
-
2017
- 2017-12-27 CN CN201721853752.8U patent/CN207703459U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007677A (en) * | 2017-12-27 | 2018-05-08 | 杭州远方光电信息股份有限公司 | A kind of laser projection speckle measurement system |
| CN108007677B (en) * | 2017-12-27 | 2023-10-27 | 杭州远方光电信息股份有限公司 | Laser projection speckle measurement system |
| CN110132544A (en) * | 2019-04-19 | 2019-08-16 | 深圳奥比中光科技有限公司 | A kind of optical test equipment |
| CN110132544B (en) * | 2019-04-19 | 2022-03-29 | 奥比中光科技集团股份有限公司 | Optical test equipment |
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