CN208736806U - Infrared filter defect detecting device - Google Patents
Infrared filter defect detecting device Download PDFInfo
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- CN208736806U CN208736806U CN201821143632.3U CN201821143632U CN208736806U CN 208736806 U CN208736806 U CN 208736806U CN 201821143632 U CN201821143632 U CN 201821143632U CN 208736806 U CN208736806 U CN 208736806U
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- infrared filter
- light source
- source unit
- detecting device
- defect detecting
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Abstract
The utility model relates to a kind of infrared filter defect detecting devices, including the camera unit (1), lens unit (2) and light source unit (3) being sequentially coaxially arranged, it is characterized in that, further include: barn door (4), the barn door (4) are equipped with light hole (41)；The lower section of the light source unit is arranged in the barn door (4), and the light passing (41) is coaxially disposed with the light source unit (3).The infrared filter defect detecting device of the utility model can carry out defects detection to surface infrared filter with high reflectivity, and can effectively ensure that the accuracy to infrared filter testing result.
Description
Technical field
The utility model relates to filter plate defect detecting technique fields more particularly to a kind of infrared filter defects detection to fill
It sets.
Background technique
Narrow band filter slice belongs to band pass filter, is that a kind of the light of certain wavelength can be allowed by allowing the light of its all band
The optical module of reflection or decaying.The working region of narrow wave filter plate can be ultraviolet light wave band, visible light wave range, near-infrared
Optical band and far red light wave band.
Filter plate detection on existing market mostly uses greatly artificial detection or board equipment to detect.Artificial detection is manually to exist
Detected under stereomicroscope, this detection method may only detection filter piece surface defect, while manual detection efficiency is extremely low,
Subjectivity is strong, and for testing result there are large error, accuracy is lower.
Although existing board equipment detection realizes the automatic detection to filter plate, it often can only be for common
The filter plate of visible light wave range carries out defects detection.And infrared filter be since it can only allow infrared light to penetrate, remaining wave band
Light be reflected, surface reflectivity has reached 90% or more, such as using existing board equipment to infrared filter into
Row defects detection, infrared filter surface will reflect a large amount of light and enter the detection visual field, to influence the standard of testing result
True property.
Utility model content
The purpose of this utility model is to provide a kind of infrared filter defect detecting devices, improve and lack to infrared filter
Fall into the accuracy of detection.
To achieve the above object, the utility model provides a kind of infrared filter defect detecting device, including sequentially coaxially
Camera unit, lens unit and the light source unit of setting, further includes:
Barn door, the anti-dazzling screen are equipped with light hole；
The lower section of the light source unit is arranged in the barn door, and the light hole is coaxially set with the light source unit
It sets.
One aspect according to the present utility model, the barn door and the light source unit, the infrared filter meet
Relationship: a >=b or a >=c；
Wherein a indicates the outer dimension of the barn door, and b indicates the outer diameter of the light source unit, infrared filter described in c
Outer dimension.
One aspect according to the present utility model, the infrared filter and the light source unit meet relationship: c≤b, institute
It states barn door and the infrared filter meets relationship: a >=c.
One aspect according to the present utility model, the infrared filter and the light source unit meet relationship: c >=b, institute
It states barn door and the light source unit meets relationship: a >=b.
The size of one aspect according to the present utility model, the light hole meets relational expression:
Wherein u indicates the length of the light hole, and v indicates that the width of the light hole, l indicate the work of the barn door
Distance, h indicate the operating distance of the light source unit, and R indicates that the inside radius of the light source unit, FOV indicate the camera lens list
The linear field of member, a and b respectively indicate the length and width of the camera unit target surface.
One aspect according to the present utility model, the light source unit are the annular light source of high angle.
One aspect according to the present utility model, the high angle range are that horizontal direction is greater than 45 °.
One aspect according to the present utility model, the light source unit are scattering blue light.
One aspect according to the present utility model, the lens unit are object space telecentric lens.
A scheme according to the present utility model can be well due to being provided with barn door in the lower section of light source unit
Interference light is blocked, avoids not being reflected into inspection by infrared filter surface to be detected in the light of field range
It surveys within sweep of the eye, to advantageously ensure that relatively sharp to the Image Acquisition of infrared filter to be detected, and then guarantees final
To the accuracy of infrared filter defects detection result.
The size of light hole is arranged by a scheme according to the present utility model according to above-mentioned relation formula is met, from
And light source unit can be allow to scatter the surface that enough light reaches infrared filter to be detected by light hole, meet
Detection demand, while again the drawbacks of light is emitted into the detection visual field can be caused interference with to avoid the aperture due to light hole is excessive.
Detailed description of the invention
Fig. 1 is the structural plan for schematically showing infrared filter defect detecting device according to the present utility model；
Fig. 2 is the perspective representation for schematically showing infrared filter defect detecting device according to the present utility model；
Fig. 3 is the main view for schematically showing infrared filter defect detecting device according to the present utility model；
Fig. 4 is schematically shown according to a kind of configuration diagram of the barn door of embodiment of the utility model；
Fig. 5 is the effect picture schematically shown using board equipment detects infrared filter in the prior art；
Fig. 6 is the lateral intensity profile for schematically showing the infrared filter using the detection of board equipment in the prior art
Figure；
Fig. 7 is to schematically show to detect infrared filter using the infrared filter defect detecting device of the utility model
Effect picture；
Fig. 8 is the infrared filter for schematically showing the infrared filter defect detecting device detection using the utility model
Lateral intensity profile figure.
Specific embodiment
It, below will be to implementation in order to illustrate more clearly of the utility model embodiment or technical solution in the prior art
Attached drawing needed in mode is briefly described.It should be evident that the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skills without creative efforts, can be with
It obtains other drawings based on these drawings.
When being described for the embodiments of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower",
"front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", orientation or positional relationship is expressed by "outside"
Based on orientation or positional relationship shown in relevant drawings, it is merely for convenience of describing the present invention and simplifying the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore on
Stating term should not be understood as limiting the present invention.
The utility model is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot herein one
One repeats, but therefore the embodiments of the present invention is not defined in following implementation.
In conjunction with shown in Fig. 1, Fig. 2 and Fig. 3, the utility model infrared filter defect detecting device includes camera unit 1, mirror
Head unit 2, light source unit 3 and barn door 4.As shown, along direction from top to bottom, camera unit 1, lens unit 2, light
Source unit 3 is sequentially coaxially arranged, and lens unit 2 is located at 1 lower section of camera unit, and light source unit 3 is located at 2 lower section of lens unit.It hides
Tabula rasa 4 is arranged below light source unit 3, and barn door 4 is equipped with light hole 41, and light hole 41 is coaxially disposed with light source unit 3,
I.e. camera unit 1, lens unit 2, light source unit 3 and the axis of light hole 41 overlap.
The infrared filter defect detecting device of the utility model can be with for detecting the defect situation of infrared filter
Infrared filter 5 to be detected is fixed on objective table, objective table is located at 4 lower section of barn door, makes by adjusting objective table to be checked
It surveys 5 axis of infrared filter to be overlapped with the axis of light hole 41, defects detection then is carried out to infrared filter 5.To infrared
When filter plate carries out defects detection, since infrared filter surface reflectivity is 90% or more, examined to infrared filter
When survey, the light of light source unit 3 can make certain not in light within the vision by the surface of infrared filter 5 to be detected
It can be reflected within sweep of the eye, and the infrared filter defect detecting device of the utility model is due under light source unit 3
Side is provided with barn door 4, can well block interference light, avoids not in the light of field range by be detected
5 surface of infrared filter is reflected into detection within sweep of the eye, to advantageously ensure that the figure to infrared filter 5 to be detected
It is relatively sharp as acquiring, and then guarantee finally to the accuracy of infrared filter defects detection result.
The infrared filter defect detecting device of the utility model is described in detail below.
According to the testing requirements to infrared filter defect, the infrared filter defect detecting device of the utility model needs
The defect of predefined size can be told, therefore, in the present embodiment, camera unit 1 uses high resolution camera, is conducive to
Guarantee the accuracy to infrared filter defects detection, and the size of camera resolution can be examined according to infrared filter defect
The required precision of survey is selected.
In the present embodiment, lens unit 2 uses object space telecentric lens, and principle is that aperture diaphragm is placed on optics
In the image space focal plane of system, the convergence center that object space chief ray is parallel to optical axis chief ray is located at image space infinity, referred to as
Object space telecentric beam path can eliminate object space due to inaccurate bring error in reading of focusing.Particularly, when aperture diaphragm is placed on picture
When on square focal plane, even if object distance changes, image distance also changes, but does not change image height, that is, the dimension of object measured
It will not change.Therefore the lens unit 2 of the utility model uses object space telecentric lens, when being detected to infrared filter
Perspective error when detection can be eliminated, and guarantees measurement accuracy.
In the present embodiment, the annular light source of 3 high angle of light source unit of the utility model, in the present embodiment,
High angle range is to be greater than 45 ° in the horizontal direction, specifically the blue light of scattering can be selected as light source unit 3.So may be used
With amplify as much as possible light scattering properties obtain high contrast image, further according to obtained image to infrared filter into
When row defect dipoles, advantageously ensures that the accuracy of infrared filtering rate defect dipoles, that is, advantageously ensure that infrared filter
The accuracy of defects detection result.
In conjunction with shown in Fig. 1 and Fig. 4, in the present embodiment, in the infrared filter defect detecting device of the utility model
Barn door 4 be circular plate structure, circular plate structure center be arranged light hole 41, in the present embodiment,
Light hole 41 is rectangle.The pore size of light hole 41 meets relational expression:
Wherein u indicates the length of the light hole, and v indicates that the width of the light hole, l indicate the work of the barn door 4
Make distance, h indicates the operating distance of the light source unit 3, and R indicates that the inside radius of the light source unit, FOV indicate the camera lens
The linear field of unit 2, a and b respectively indicate the length and width of 1 target surface of camera unit.
The size of the light hole 41 of the utility model is arranged according to above-mentioned relation formula is met, so as to make light source list
Member 3 can scatter the surface that enough light reaches infrared filter 5 to be detected by light hole 41, meet detection demand,
Simultaneously the drawbacks of detecting the visual field can be emitted into avoid light is caused interference with since light hole 41 is excessive again.
The process of defects detection is carried out to infrared filter using the infrared filter defect detecting device of the utility model
It is as follows:
Firstly the need of the infrared filter defect detecting device for assembling the utility model according to actual needs.Specifically,
According to the testing requirements of the defect precision to infrared filter, suitable camera unit 1, lens unit 2 and light source unit are chosen
3.Then the outer diameter b of the outer dimension c of infrared filter 5 more to be detected and light source unit 3, if infrared filtering to be detected
The outer dimension c of piece is greater than the outer diameter b of light source unit 3, then the outer dimension a for choosing barn door 4 should be greater than being equal to light source
The outer diameter b of unit 3.If the outer dimension c of infrared filter 5 to be detected is less than or equal to the outer diameter b of light source unit 3,
The outer dimension a for then choosing barn door 4 is more than or equal to the outer dimension c of infrared filter 5 to be detected.Chosen barn door 4 it
Afterwards it needs to be determined that the pore size of the light hole 41 on barn door 4.Camera list can be set gradually according to direction from top to bottom
Member 1, lens unit 2, light source unit 3 and barn door 4, it is ensured that camera unit 1, lens unit 2, light source unit 3 and light hole 41
Axis be overlapped, later, infrared filter 5 to be detected is placed on objective table unit, adjusts infrared filter 5 to be detected
Position is overlapped the axis of infrared filter 5 to be detected also with the axis of light hole 41.Then according to lens unit 2 when detection
The distance between the distance between filter plate to be detected, light source unit 3 and infrared filter to be detected and barn door 4 with it is to be checked
The parameters such as the distance between infrared filter are surveyed, the aperture for calculating light hole 41 on barn door 4 according to above-mentioned formula should be arranged
Size.
Then it need to only ensure above-mentioned selected camera unit 1, lens unit 2, light source unit 3, barn door 4 and to be detected red
The central axial coincidence of outer filter plate can start to carry out defects detection to infrared filter.Operating process is as follows: adjustment camera
Unit 1 and lens unit 2 at a distance from infrared filter 5 to be detected, are in infrared filter 5 to be detected in the vertical direction
The focal position of lens unit 2, and the time for exposure for adjusting camera unit 1 makes infrared absorption filter to be detected to a certain suitable numerical value
The imaging clearly of wave plate 5, and then carry out Image Acquisition.Then algorithm calculating is carried out to acquired image, according to testing requirements,
Judge whether infrared filter is qualified.The utility model infrared filter defect detecting device can be moved later to next to be checked
It surveys at infrared filter, it can be achieved that automation batch detection.
It is illustrated below with specific embodiment:
Suitable camera unit 1, lens unit 2 and light source unit 3 are chosen according to specific testing requirements first.In this reality
It applies in example, defects detection is carried out to the infrared filter that diameter is 25cm, it can be according to the outer dimension and light of infrared filter
The size relation of the size of source unit 3 chooses the diameter of barn door 4 in the present embodiment to choose the barn door 4 of suitable size
For 100mm, from top to bottom successively by camera unit 1, lens unit 2, light source unit 3, barn door 4 and infrared filter to be detected
Setting, set lens unit 2 at a distance from infrared filter the i.e. operating distance of lens unit 2 as 110mm, light source unit 3 and
The distance between infrared filter is that the operating distance h of light source unit 3 is 80mm.Set barn door 4 and infrared filtering to be detected
The distance between piece 5 is 20mm, i.e. the operating distance l of barn door 4 is 20mm.In the present embodiment, the line view of lens unit 2
Field is 17.52mm, and the length a and width b of camera target surface can also be determined according to the camera unit of selection 1 and light source unit 3
And the inside radius R of light source unit 3, show that the length u of light hole 41 is 20.7mm according to above-mentioned formula later, width v is
15.2mm.After the pore size for setting the light hole 41 on barn door 41, it is ensured that camera unit 1, lens unit 2, light source
The axis of unit 3, light hole 41 and infrared filter, which is overlapped, to carry out defects detection to infrared filter.
Fig. 5 and Fig. 6 is to schematically show the infrared filter defect detecting device of not set barn door to infrared absorption filter respectively
The effect picture of wave plate detection and lateral gray value profiles.Fig. 7 and Fig. 8 is the infrared filter for schematically showing the utility model
The effect picture and lateral gray value profiles that defect detecting device detects infrared filter.In conjunction with Fig. 5, Fig. 6, Fig. 7 and Fig. 8 institute
Show, the intermediate dark limb of detection effect presentation is bright (as shown in Figure 5) when without barn door 4, passes through gray value in image X-direction
It was found that the gray value of obvious intermediate region is lower than both sides (as shown in Figure 6), this is because the light of 2 surrounding of light source unit passes through
Infrared filter to be detected is crossed, due to the characteristic of infrared filter itself, surface can only penetrate the light of infrared band, other light
Source is reflected away, and the light reflected away occurs reflection by camera lens one side or certain several times and again passes by infrared absorption filter to be detected
Enter camera unit 1 within sweep of the eye after wave plate reflection, shows the bright imaging effect of intermediate dark surrounding afterwards.And this is practical
Novel detection device is provided with barn door 4, from finding out that illumination is relatively uniform in Fig. 8 in grayscale image, center and surrounding gray value
Deviation is little, this is because the light of light source surrounding passes through infrared filter to be detected, the light reflected away is a certain by camera lens
Face or certain several times again pass by infrared filter to be detected after reflecting and reflect, and the light of transmitting is kept off by barn door 4
Firmly, it cannot be introduced into camera fields of view, center is uniform (as shown in Figure 7) so surrounding brightness compares.It is i.e. practical new using this
The infrared filter defect detecting device of type detects infrared filter, it can be ensured that the image of use is more accurate to be had
Effect, to guarantee the accuracy and validity of testing result.
The foregoing is merely a schemes of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all the spirit and principles of the utility model it
Interior, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of infrared filter defect detecting device, including camera unit (1), the lens unit (2), light being sequentially coaxially arranged
Source unit (3), which is characterized in that further include:
Barn door (4), the barn door (4) are equipped with light hole (41)；
The barn door (4) is arranged in the lower section of the light source unit (3), the light hole (41) and the light source unit (3)
It is coaxially disposed.
2. infrared filter defect detecting device according to claim 1, which is characterized in that the barn door (4) and institute
State light source unit (3), the infrared filter meets relationship: a >=b or a >=c；
Wherein a indicates the outer dimension of the barn door (4), and b indicates the outer diameter of the light source unit (3), infrared filtering described in c
The outer dimension of piece.
3. infrared filter defect detecting device according to claim 2, which is characterized in that the infrared filter and institute
State light source unit (3) and meet relationship: c≤b, the barn door (4) and the infrared filter meet relationship: a >=c.
4. infrared filter defect detecting device according to claim 2, which is characterized in that the infrared filter and institute
State light source unit (3) and meet relationship: c >=b, the barn door (4) and the light source unit (3) meet relationship: a >=b.
5. infrared filter defect detecting device according to claim 1, which is characterized in that the light hole (41) it is big
It is small to meet relational expression:
Wherein u indicates the length of the light hole (41), and v indicates that the width of the light hole (41), l indicate the barn door
(4) operating distance, h indicate the operating distance of the light source unit (3), and R indicates the inside radius of the light source unit (3), FOV
Indicate that the linear field of the lens unit (2), a and b respectively indicate the length and width of the camera unit (1) target surface.
6. infrared filter defect detecting device according to claim 1, which is characterized in that the light source unit (3) is
The annular light source of high angle.
7. infrared filter defect detecting device according to claim 6, which is characterized in that the high angle range is water
Square to be greater than 45 °.
8. infrared filter defect detecting device according to claim 6, which is characterized in that the light source unit (3) is
Scattering blue light.
9. infrared filter defect detecting device according to claim 1, which is characterized in that the lens unit (2) is
Object space telecentric lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821143632.3U CN208736806U (en) | 2018-07-19 | 2018-07-19 | Infrared filter defect detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821143632.3U CN208736806U (en) | 2018-07-19 | 2018-07-19 | Infrared filter defect detecting device |
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| Publication Number | Publication Date |
|---|---|
| CN208736806U true CN208736806U (en) | 2019-04-12 |
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ID=66026202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821143632.3U Active CN208736806U (en) | 2018-07-19 | 2018-07-19 | Infrared filter defect detecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530884A (en) * | 2019-10-09 | 2019-12-03 | 易思维（杭州）科技有限公司 | Laser Welding protects eyeglass defect detecting device |
-
2018
- 2018-07-19 CN CN201821143632.3U patent/CN208736806U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530884A (en) * | 2019-10-09 | 2019-12-03 | 易思维（杭州）科技有限公司 | Laser Welding protects eyeglass defect detecting device |
| CN110530884B (en) * | 2019-10-09 | 2021-11-02 | 易思维（杭州）科技有限公司 | Laser welding protective lens defect detection device |
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