CN208270178U - Uniform light source angle uniformity testing device - Google Patents
Uniform light source angle uniformity testing device Download PDFInfo
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- CN208270178U CN208270178U CN201820809288.0U CN201820809288U CN208270178U CN 208270178 U CN208270178 U CN 208270178U CN 201820809288 U CN201820809288 U CN 201820809288U CN 208270178 U CN208270178 U CN 208270178U
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Abstract
The utility model belongs to the optical testing field relates to a uniform light source angle homogeneity testing arrangement, and one set of arc guide rail of having solved the prior art existence can only adaptation diameter emitting surface, causes the problem of drop-in height, wasting of resources. The technical solution of the utility model is that: a uniform light source angle uniformity testing device comprises an X-Y two-dimensional scanning frame, a rotary platform and a light brightness detector; the X-Y two-dimensional scanning frame comprises a transverse plate and a vertical plate, wherein the vertical plate is vertically arranged on the transverse plate and can axially reciprocate along the transverse plate; the rotary platform is arranged on the vertical plate, the rotary platform can axially reciprocate along the vertical plate and can also rotate on the vertical plate, and the brightness detector is arranged on the rotary platform.
Description
Technical field
The utility model belongs to optical testing art, is related to a kind of uniform source of light angle homogeneity test device.
Background technique
Theoretically, when imaging is taken pictures with the object that camera is directed at a brightness uniformity, the gray scale of gained image also should
It is uniform, but due to the inconsistency of the inconsistency and Subsequent electronic circuit that are responded between each pixel of camera, so that shooting
Image is not substantially uniformity.It is influenced to eliminate these inconsistent brings, improves the visual effect of image shot by camera
And precision, it is necessary to it is this inconsistent to measure to develop a kind of device, and eliminates it.
Homogeneous radiation light source, be it is a kind of using light sphere inner surface continuous several times reflect, finally from light-emitting window radiate
The instrument and equipment of light, because its coating on inner surface has very high reflection characteristic with each to consistent characteristic, so that finally from out
The light that loophole gives off has very high uniformity in entire light-emitting surface.
In research and production, if the uniformity of uniform source of light radiating exit surface, by calibration in advance, precision, which meets, to be surveyed
Examination requires, then shooting image is unevenly as caused by camera itself, by shooting image under different brightness conditions
Gray correction, find out wherein regular, the correction of camera response consistency can be realized, reach good visual effect.
Carry out camera homogeneity correction, it is necessary to meet the item that light source exit facet and camera optics camera lens aperture are adapted
Part.With the continuous improvement of camera observation fineness, the bore of camera is increasing, and corresponding uniform source of light outgoing bore is also got over
Come bigger, this just brings difficulty to the calibration of uniform source of light.
The uniformity of uniform source of light 13 is primarily referred to as the surface uniformity and angle uniformity of its radiating exit surface, surface uniformity
Test method as shown in Figure 1, in front of uniform source of light output face 14 install x-y coordinate scanning means, plane of movement perpendicular to
Uniform source of light systematic optical axis, the plane of scanning motion are the circumscribed square of uniform source of light exit facet.By brightness detector 3 in x-y
Movement on coordinate scanning support, completes the scanning to entire exit facet, and the end of scan controls computer 4 according to evaluation algorithms meter
Calculate the surface uniformity of this exit facet.
The test method of angle uniformity as shown in Fig. 2, it is defined as in the plane perpendicular to uniform source of light exit facet, with
15 center of the center of circle of light source exit facet is origin, and to be emitted radius surface as radius, scanning is formed both horizontally and vertically
Arc surface on, uniformity of the brightness with respect to zero angle within the scope of certain angle.It is defined according to this, brightness detector 3
Motion profile is circular arc, using 14 center of circle of light source exit facet as center of arc, to be emitted radius surface as sweep radius.Carry out
Angle uniformity test, it is necessary to which configuration and the consistent arc guide rail of uniform source of light exit facet diameter, the variation of uniform source of light exit facet are led
Rail radius changes therewith, cannot be general.But it with the continuous increase of uniform source of light exit facet size, is equipped with adaptable guide rail and gets over
Come more complicated, and puts into and be continuously improved, a set of arc-shaped guide rail can only be adapted to a kind of exit facet of diameter, result in waste of resources.
Summary of the invention
To solve the exit facet that a set of arc-shaped guide rail existing for above-mentioned technology can only be adapted to a kind of diameter, cause to put into
The problem of height, the wasting of resources, the utility model proposes one kind to realize uniform source of light angle based on X-Y two-dimensional scanning frame and rotating platform
The device of uniformity test, the device can test various sizes of uniform source of light exit facet, improve measuring device
Adaptability and testing efficiency.
The technical solution that the utility model solves the above problems is a kind of uniform source of light angle homogeneity test device, special
Different place is:
Including X-Y two-dimensional scanning frame, rotating platform and brightness detector；
The X-Y two-dimensional scanning frame includes transverse slat and riser, and riser is vertically set on transverse slat, and riser can be along transverse slat axis
To reciprocating motion；
Rotating platform is arranged on riser, and rotating platform can also rotate, light along riser axially reciprocating on riser
Brightness detector is arranged on the rotating platform.
The above are the basic structures of the utility model, are based on the basic structure, and the utility model is also made following optimization and changed
Into:
Further, above-mentioned transverse slat is equipped with first driving device, and riser is equipped with the second driving device, on rotating platform
Equipped with third driving device；
First driving device driving riser axially moves reciprocatingly along transverse slat；Second driving device drives rotating platform along perpendicular
Board shaft is to moving reciprocatingly；Third driving device drives rotating platform rotation.
Further, the first feed screw nut on above-mentioned transverse slat equipped with the first lead screw and with the cooperation of the first lead screw；First drives
Dynamic device is first motor, and first motor drives the rotation of the first lead screw；
The second feed screw nut on riser equipped with the second lead screw and with the cooperation of the second lead screw；Second driving device is the second electricity
Machine, the rotation of second the second lead screw of motor driven；
The riser is fixed on the first feed screw nut；
The rotating platform is fixed on the second feed screw nut.
Further, above-mentioned third driving device is third motor.
Further, above-mentioned first motor, the second motor and third motor are stepper motor.
In addition, the invention also discloses a kind of test method of above-mentioned uniform source of light angle homogeneity test device,
It is characterized in that, comprising the following steps:
1) angle uniformity test is carried out to the Y-direction of uniform source of light (vertically with ground direction)
1.1) X-Y two-dimensional scanning frame is installed, makes the plane of scanning motion of X-Y two-dimensional scanning frame perpendicular to ground, riser is parallel to Y
To；
1.2) it is counted according to the angular range of angle uniformity test, measurement, setting test step-length；
1.3) computer is controlled according to the light source exit facet diameter and measurement parameter of setting, to the fortune of X-Y two-dimensional scanning frame
Line position is set, the angle of revolution of rotating platform is planned, guarantees that test point is located at the consistent circular arc of diameter with light source exit facet
On track, brightness detector is directed toward the center of circle of light source exit facet always, measures the luminance data of the angle position；
1.4) test data of the brightness detector of the data collecting card collecting test point in computer, control meter are controlled
Calculation machine statistical test is as a result, generate the angle uniformity test report of uniform source of light Y-direction；
2) to uniform source of light X to the angle uniformity test of (being parallel to ground direction)
2.1) X-Y two-dimensional scanning frame is installed, so that the plane of scanning motion of X-Y two-dimensional scanning frame is parallel to ground, riser is parallel to X
To；
2.2) according to the angular range of angle uniformity test, measurement points, setting test step-length；
2.3) control computer erects X-Y two-dimensional scanning frame according to the light source exit facet diameter and measurement parameter of setting
Plate, transverse slat running position, rotating platform angle of revolution planned, guarantee that test point is located at diameter one with light source exit facet
On the arc track of cause, brightness detector is directed toward the center of circle of light source exit facet always, measures the bright degree of the angle position
According to；
2.4) test data of the brightness detector of the data collecting card collecting test point in computer, control meter are controlled
Calculation machine statistical test is as a result, generate the angle uniformity test report of uniform source of light Y-direction；Test is completed.
The advantages of the utility model:
1, versatile.A kind of uniform source of light angle homogeneity test device of the utility model, X-Y two-dimensional scanning frame can be achieved
The angle uniformity test of different uniform source of light exit facet sizes；
2, save the cost.A kind of uniform source of light angle homogeneity test device of the utility model, uniform source of light exit facet size
After variation, no replacement is required guide rail, a set of achievable various sizes of uniform source of light angle uniformity test of test device.
3, measurement accuracy is high.A kind of uniform source of light angle homogeneity test device of the utility model, using control computer control
The movement of X-Y two-dimensional scanning frame processed and the rotation of rotating platform, so that the position of brightness detector is in arc track always
On, angle is consistent with test angle, and brightness detector is directed toward the exit facet center of circle always.
Detailed description of the invention
Fig. 1 is uniform source of light surface uniformity test schematic diagram；
Fig. 2 is uniform source of light angle uniformity test schematic diagram；
Fig. 3 is the X-Y two-dimensional scanning frame structure chart of the utility model；
Fig. 4 is schematic diagram when the utility model carries out angle Y-direction uniformity test；
Fig. 5 is that the utility model carries out schematic diagram of the angle X to uniformity test when；
Fig. 6 is the utility model uniform source of light angle homogeneity test device test philosophy schematic diagram.
Wherein, 1-X-Y two-dimensional scanning frame；101- transverse slat；102- riser；2- rotating platform；3- brightness detector；4- control
Computer processed；The first lead screw of 5-；The first feed screw nut of 6-；7- first motor；The second lead screw of 8-；The second feed screw nut of 9-；10-
Two motors；11- third motor；13- uniform source of light；
14- light source exit facet；The center of circle of 15- light source exit facet；16- arc track.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
According to the definition of uniform source of light angle uniformity test, the running track of luminometer is and uniform source of light exit facet half
The consistent circular arc of diameter, the detection direction of luminometer are directed toward the exit facet center of circle always.As long as meeting above-mentioned requirements, angle can be completed
Uniformity test.
Referring to Fig. 3-Fig. 5, a kind of uniform source of light angle homogeneity test device, including X-Y two-dimensional scanning frame 1, rotating platform
2, brightness detector 3 and control computer 4.
The X-Y two-dimensional scanning frame 1 includes transverse slat 101 and riser 102, and riser 102 is vertically set on transverse slat 101, and
Riser 102 can be along the axially reciprocating of transverse slat 101；Rotating platform 2 is arranged on riser 102, and rotating platform 2 can be along riser
102 axially reciprocating, and can be rotated on riser 102, brightness detector 3 is arranged on rotating platform 2；Control calculates
Machine 4 control riser 102 along transverse slat 101 displacement and rotating platform 2 of axial, rotating platform 2 along the axial movement of riser 102
Rotational angle.
Transverse slat 101 is equipped with first driving device, and riser 102 is equipped with the second driving device, and rotating platform 2 is equipped with third
Driving device；First driving device drives 102 plate of riser axially to move reciprocatingly along transverse slat 101；The driving rotation of second driving device
Turn platform 2 and axially moves reciprocatingly along riser 102；Third driving device is for driving rotating platform 2 to rotate.
The first feed screw nut 6 on transverse slat 101 equipped with the first lead screw 5 and with the cooperation of the first lead screw 5；First driving device is
First motor 7, first motor 7 drive the rotation of the first lead screw 5；Cooperate on riser 102 equipped with the second lead screw 8 and with the second lead screw 8
The second feed screw nut 9；Second driving device is the second motor 10, and the second motor 10 drives the rotation of the second lead screw 8；The riser
102 are fixed on the first feed screw nut 6；The rotating platform 2 is fixed on the second feed screw nut 9；Control the control of computer 4 the
The start and stop of one motor 7, the second motor 10.Third driving device is third motor 11, and control computer 4 controls third motor 11
Start and stop.The output shaft of third motor 11 is connect with rotating platform 2, directly drives the rotation of rotating platform 2.
First motor 7, the second motor 10 and third motor 11 are stepper motor.
Data collecting card and process of measurement are installed in control computer 4.
A kind of test method based on above-mentioned uniform source of light angle homogeneity test device, comprising the following steps:
1) angle uniformity test is carried out to the Y-direction of uniform source of light 13
1.1) X-Y two-dimensional scanning frame 1 is installed, makes the plane of scanning motion of X-Y two-dimensional scanning frame 1 perpendicular to ground, riser 102 is flat
Row is in Y-direction；
1.2) it is counted according to the angular range of angle uniformity test, measurement, setting test step-length；
1.3) computer 4 is controlled according to 14 diameter of light source exit facet and measurement parameter of setting, to X-Y two-dimensional scanning frame 1
Running position, rotating platform 2 angle of revolution planned, guarantee test point be located at 14 diameter of light source exit facet it is consistent
On arc track 16, brightness detector 3 is directed toward the center of circle 15 of light source exit facet always, measures the bright degree of the angle position
According to；
1.4) test data of the brightness detector 3 of the data collecting card collecting test point in computer 4, control are controlled
4 statistical test of computer as a result, generate uniform source of light 13Y to angle uniformity test report；
2) to uniform source of light 13X to angle uniformity test
2.1) X-Y two-dimensional scanning frame 1 is installed, so that the plane of scanning motion of X-Y two-dimensional scanning frame 1 is parallel to ground, riser 102 is flat
Row in X to；
2.2) according to the angular range of angle uniformity test, measurement points, setting test step-length；
2.3) computer 4 is controlled according to 14 diameter of light source exit facet and measurement parameter of setting, to X-Y two-dimensional scanning frame 1
Riser 102,101 running position of transverse slat, rotating platform 2 angle of revolution planned, guarantee test point be located at go out with light source
It penetrates on the consistent arc track 16 of 14 diameter of face, brightness detector 3 is directed toward the center of circle 15 of light source exit facet always, measures the angle
Spend the luminance data of position；
2.4) test data of the brightness detector 3 of the data collecting card collecting test point in computer 4, control are controlled
4 statistical test of computer as a result, generate uniform source of light 13Y to angle uniformity test report；Test is completed.
Referring to fig. 4, when carry out uniform source of light 13Y to angle uniformity test when, by 1 side of being orthogonal of X-Y two-dimensional scanning frame
To installation, the plane of scanning motion is perpendicular to the ground, and rotating platform 2 is installed on riser 102, and plane of rotation and light source exit facet 14 hang down
Directly, rotating platform 2 is equal with the stroke of -Y direction along+Y.Now to measure uniform source of light 13+Y to for the uniformity of angle, illustrate it
Measuring principle.As shown in fig. 6, from the X of brightness detector 3 to position, Y to 14 radius relationship of position and light source exit facet,
It realizes the positioning for being located at measurement point on arching trajectory, by the rotation amendment test solid angle of rotating platform 2, detects brightness
Device 3 aims at the center of circle 15 of light source exit facet always.If the radius of light source exit facet 14 is R, with 14 place plane of light source exit facet
For zero-bit, then the X of certain location point is shown to such as formula of the position with Y-direction (1) and formula (2) on circular arc.X-Y two-dimensional scanning frame 1 moves
After in place, rotating platform 2 turns over angle step θ, that is, can measure the luminance data of the angle position.
xi=Rcos θiFormula (1)
yi=Rsin θiFormula (2)
R in formula --- the radius of light source exit facet 14；
xi--- measurement angle θiWhen, riser 102 is in X to position；
yi--- measurement angle θiWhen, rotating platform 2 is in Y-direction position；
θi--- with exit facet central optical axis for 0 °, the absolute angle of ith measurement point, the value range of i is 1 ... n, n
For the measurement points of+Y-direction, usual+Y and -Y direction measurement points are consistent.
When actual test, is controlled for convenience of computer 4 is controlled, above-mentioned position is converted into relative position increment, riser
102X presses formula (3)-formula (5) to, the Y-direction displacement of rotating platform 2 and 2 rotating angle increment of rotating platform respectively and calculates.
Δxi=R (cos θi-cosθi-1) formula (3)
Δyi=R (sin θi-sinθi-1) formula (4)
Δθi=θiFormula (5)
The angle uniformity principle for measuring -Y direction is consistent with +Y direction, and only Y-direction guide rail is moved along -Y direction, rotating platform
2 corners are-θ.
Referring to Fig. 5, when carry out uniform source of light 13X to angle uniformity test when, by 1 side of being orthogonal of X-Y two-dimensional scanning frame
To installation, the plane of scanning motion is parallel to the ground, the upper installation rotating platform 2 of riser 102, plane of rotation and light source exit facet 14
Vertically, rotating platform 2 is equal with the stroke of -Y direction along+Y.Test philosophy is consistent with Y-direction angle uniformity test, and only Y-direction is former
The vertical movement come becomes moving horizontally, other constant.
Brightness detector 3 is mounted on rotating platform 2, and brightness detector 3 can be adapted to the optical frames of different field angles
Head (such as 1 °, 3 ° and 10 °), enables brightness detector 3 to be measured in certain field range of light source exit facet as needed
Brightness；The optical filter of differential declines ratio can be also adapted to before 3 optical lens of brightness detector, it is bright to meet the different spokes of measurement
The requirement of light source uniformity under the conditions of degree.Photoelectric conversion circuit and Design of Amplification Circuit are inside brightness detector 3, by coaxial
Cable transmission gives control computer 4.
The signal for controlling the data collecting card acquisition brightness detector output of computer 4, carries out analog-to-digital conversion to it.It surveys
The process of measurement for controlling computer 4, the measurement angle and measurement selected according to the radius of light source exit facet 14 and user walk
It is long, X-Y two-dimensional scanning frame 1 and rotating platform 2 are controlled by above-mentioned mathematical relationship and moves to designated position, are recorded angle information, are adopted
3 signal of light harvesting brightness detector after acquisition, is moved to the next position, and repeated acquisition process so recycles, until all
Location point measurement acquisition finishes, and the angle uniformity of tested uniform source of light 13 is calculated according to assignment algorithm.
Claims (5)
1. a kind of uniform source of light angle homogeneity test device, it is characterised in that:
Including X-Y two-dimensional scanning frame (1), rotating platform (2) and brightness detector (3)；X-Y two-dimensional scanning frame (1) packet
Transverse slat (101) and riser (102) are included, riser (102) is vertically set on transverse slat (101), and riser (102) can be along transverse slat
(101) axially reciprocating；
Rotating platform (2) is arranged on riser (102), and rotating platform (2) can may be used also along the axially reciprocating of riser (102)
It is rotated on riser (102), brightness detector (3) is arranged on rotating platform (2).
2. a kind of uniform source of light angle homogeneity test device according to claim 1, it is characterised in that:
The transverse slat (101) is equipped with first driving device, and riser (102) is equipped with the second driving device, and rotating platform (2) is set
There is third driving device；
First driving device drives riser (102) axially to move reciprocatingly along transverse slat (101)；Second driving device drives rotary flat
Platform (2) axially moves reciprocatingly along riser (102)；Third driving device drives rotating platform (2) rotation.
3. a kind of uniform source of light angle homogeneity test device according to claim 2, it is characterised in that: first driving
Device includes the first lead screw (5), the first feed screw nut (6) and first motor (7) with the first lead screw (5) cooperation, first motor
(7) driving the first lead screw (5) rotation；Second driving device includes the second lead screw (8), the with the second lead screw (8) cooperation
Two feed screw nuts (9) and the second motor (10), the second motor (10) drive the second lead screw (8) rotation；
The riser (102) is fixed on the first feed screw nut (6)；
The rotating platform (2) is fixed on the second feed screw nut (9).
4. a kind of uniform source of light angle homogeneity test device according to claim 3, it is characterised in that: the third driving
Device is third motor (11).
5. a kind of uniform source of light angle homogeneity test device according to claim 4, it is characterised in that: the first motor
(7), the second motor (10) and third motor (11) are stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820809288.0U CN208270178U (en) | 2018-05-28 | 2018-05-28 | Uniform light source angle uniformity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820809288.0U CN208270178U (en) | 2018-05-28 | 2018-05-28 | Uniform light source angle uniformity testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208270178U true CN208270178U (en) | 2018-12-21 |
Family
ID=64684703
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|---|---|---|---|
| CN201820809288.0U Active CN208270178U (en) | 2018-05-28 | 2018-05-28 | Uniform light source angle uniformity testing device |
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| Country | Link |
|---|---|
| CN (1) | CN208270178U (en) |
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2018
- 2018-05-28 CN CN201820809288.0U patent/CN208270178U/en active Active
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