CN215952490U - Surface flatness detection light source - Google Patents
Surface flatness detection light source Download PDFInfo
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- CN215952490U CN215952490U CN202121419690.6U CN202121419690U CN215952490U CN 215952490 U CN215952490 U CN 215952490U CN 202121419690 U CN202121419690 U CN 202121419690U CN 215952490 U CN215952490 U CN 215952490U
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Abstract
The utility model discloses a surface flatness detection light source, which comprises: the first illumination light passes through the first grid sheet, then is reflected by the first spectroscope and the second spectroscope in sequence, and is projected to the surface to be measured to form first strip light; the second illumination light passes through the first spectroscope after passing through the second grid sheet, is reflected by the second spectroscope, and is projected to the surface to be measured to form second strip light; the first strip light and the second strip light are superposed on the surface to be measured to form a net light. The grid sheets are respectively arranged on the two surface light sources, so that the light projected on the surface to be detected is superposed to form net light, and then the detection of the surface evenness can be realized according to the distortion of the net light; because the flatness detector does not need to be additionally arranged, the flatness detection process is simplified, the detection efficiency is improved, and the purpose of controlling the detection cost is also achieved.
Description
Technical Field
The utility model relates to the technical field of defect detection, in particular to a surface flatness detection light source.
Background
In order to ensure the quality of products, surface defects such as scratches, stains, or surface flatness may be detected during the production of various products.
In the prior art, a machine vision detection technology is usually adopted to realize defect detection, a machine vision detection system consists of an imaging device and a light source, a workpiece to be detected is irradiated by the light source, the imaging device is used for imaging, and finally the surface defect of the workpiece to be detected is obtained by analyzing an image. The detection scheme can detect obvious defects on the surface of the workpiece to be detected, such as scratches, dirt, bubbles and the like, but cannot effectively detect the flatness of the surface of the workpiece, and a flatness tester is additionally adopted to realize the detection of the surface flatness, so that the detection efficiency is reduced by additionally increasing detection steps, and the detection cost is correspondingly increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a surface flatness detection light source, which solves the problems that in the prior art, a flatness detector is additionally arranged for realizing the detection of the surface flatness, so that the detection efficiency is reduced and the detection cost is increased.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a surface flatness detecting light source comprising:
a first surface light source for providing first irradiation light in a first direction; a first grid sheet, a first spectroscope and a second spectroscope are arranged on a light path of the first surface light source, and the first illumination light is reflected by the first spectroscope and the second spectroscope in sequence after passing through the first grid sheet and is projected to a surface to be measured to form first strip light;
a second area light source for providing second irradiation light along a second direction; a second grid sheet, a first spectroscope and a second spectroscope are arranged on a light path of the second surface light source, and the second illumination light passes through the first grid sheet, then penetrates through the first spectroscope, is reflected by the second spectroscope, and is projected to the surface to be measured to form second strip light;
the first strip light and the second strip light are superposed on the surface to be detected to form a net light.
Optionally, the surface flatness detection light source includes a first housing, and the first surface light source and the second surface light source are both disposed in the first housing;
the first surface light source and the second surface light source are respectively arranged on two adjacent side surfaces in the first shell, and the first surface light source is perpendicular to the second surface light source.
Optionally, a first diffusion plate and a first brightness enhancement film are further disposed in the first housing, and the first diffusion plate, the first brightness enhancement film and the first grid sheet are sequentially disposed along a light path of the first surface light source.
Optionally, a second diffuser plate and a second light-adding film are further disposed in the second housing, and the second diffuser plate, the second light-adding film and the second grid sheet are sequentially disposed along a light path of the second surface light source.
Optionally, the surface flatness detection light source further comprises a second housing, wherein an adjusting plate is fixed on the first housing, and the second housing is connected to the adjusting plate in a sliding manner;
the first spectroscope is arranged in the first shell, the second spectroscope is arranged in the second shell, and the second shell can be driven to slide in the first direction to be close to or far away from the first shell.
Optionally, one end of the adjusting plate is fixedly connected with the first housing through a fastener;
the other end of the adjusting plate is provided with a kidney-shaped groove, and the kidney-shaped groove extends along the first direction; an adjusting piece is fixed on the second shell and slidably arranged in the kidney-shaped groove in a penetrating mode.
Optionally, the first illumination light and the second illumination light are incident on the second beam splitter and then reflected to form reflected light, and a first window is formed in a side surface of the second housing, which is located on a light path of the reflected light;
the first window is light-permeable, and the reflected light is emitted into the surface to be measured through the first window.
Optionally, a second window is formed in a side surface of the second shell opposite to the first window;
the second window is light-permeable, and a lens increasing body is arranged in the second window; and the reflected light is reflected to form secondary reflected light after being incident on the surface to be measured, and the part of the secondary reflected light is incident into an imaging device for imaging through the antireflection mirror after passing through the second spectroscope.
Optionally, the first beam splitter is inclined to the first illumination light setting, the second beam splitter is inclined to the second illumination light setting, and the first beam splitter is perpendicular to the second beam splitter.
Optionally, the first grid sheet is parallel to the first surface light source, and includes a plurality of first grid bars arranged in parallel;
the second grid sheet is parallel to the second surface light source and comprises a plurality of second grid strips which are arranged in parallel;
the first grid strips and the second grid strips are not light-transmitting, and the first grid strips are perpendicular to the second grid strips.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a surface flatness detection light source, wherein grid sheets are respectively arranged on two surface light sources, so that light projected on a surface to be detected is superposed to form reticular light, and the surface flatness detection is realized by judging the distortion of the reticular light; because the flatness detector does not need to be additionally arranged, and the detection step does not need to be added for detecting the flatness, the detection flow is simplified, the detection efficiency is improved, and the purpose of controlling the detection cost is also achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of a surface flatness detecting light source according to the present invention;
FIG. 2 is a front view of a surface flatness detecting light source according to the present invention;
fig. 3 is a schematic perspective view of a surface flatness detection light source according to the present invention.
In the above figures: 10. a first housing; 11. a first surface light source; 111. a first grid sheet; 112. a first diffusion plate; 113. a first brightness enhancement film; 12. a second side light source; 121. a second grid sheet; 122. a second diffusion plate; 123. a second brightness enhancement film; 13. a first beam splitter; 20. a second housing; 21. a first window; 22. a second window; 221. a lens is added; 23. a second spectroscope; 24. an adjusting plate; 241. a fastener; 242. a kidney-shaped groove; 243. an adjustment member; 31. a surface to be measured; 32. an image forming apparatus.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1 to fig. 3, an embodiment of the utility model provides a surface flatness detecting light source, which includes a first surface light source 11 and a second surface light source 12. It can be understood that first face light source 11 and second face light source 12 can include a lamp plate respectively, and evenly distributed has a plurality of lamp pearls on the lamp plate.
Specifically, the first surface light source 11 is for providing first irradiation light in a first direction; a first grid sheet 111, a first spectroscope 13 and a second spectroscope 23 are arranged on a light path of the first surface light source 11, and first illumination light is reflected by the first spectroscope 13 and the second spectroscope 23 in sequence after passing through the first grid sheet 111 and is projected to the surface 31 to be measured to form first strip light;
the second area light source 12 is used for providing second illumination light along a second direction; a second grid sheet 121, a first beam splitter 13 and a second beam splitter 23 are arranged on the light path of the second surface light source 12, and the second illumination light passes through the first grid sheet 111, then passes through the first beam splitter 13, then is reflected by the second beam splitter 23, and is projected to the surface 31 to be measured to form second strip light.
Finally, the first strip light and the second strip light are superposed on the surface 31 to be measured, so as to form a mesh light projected on the surface 31 to be measured, and further, the flatness of the surface 31 to be measured can be detected by judging the distortion of the mesh light.
Further, the surface flatness detection light source provided by the present embodiment includes a first housing 10, and the first surface light source 11 and the second surface light source 12 are both disposed in the first housing 10.
It is understood that the first housing 10 may have a rectangular parallelepiped or square shape, and the first surface light source 11 and the second surface light source 12 are respectively disposed at two adjacent sides in the first housing 10 such that the first surface light source 11 is disposed perpendicular to the second surface light source 12.
Wherein, the first spectroscope 13 is arranged obliquely to the first irradiation light, the second spectroscope 23 is arranged obliquely to the second irradiation light, and the first spectroscope 13 is perpendicular to the second spectroscope 23; the first illumination light and the second illumination light respectively have a part of light rays entering the second beam splitter 23, and the part of light rays are reflected after being reflected by the second beam splitter 23 to form reflected light for illuminating the surface to be measured 31 together.
In this embodiment, the first grid sheet 111 is parallel to the first surface light source 11, and includes a plurality of first grid bars arranged in parallel; the second grid sheet 121 is parallel to the second surface light source 12, and includes a plurality of second grid bars arranged in parallel; the first grid bars and the second grid bars are opaque. Based on this, the first illumination light is made into first strip light after passing through the first grid sheet 111, and the second illumination light is made into second strip light after passing through the first grid sheet 111.
In addition, the first grid bars are perpendicular to the second grid bars, so that the first strip light and the second strip light are superposed on the surface 31 to be measured to form a net light projected on the surface 31 to be measured.
Further, a first diffusion plate 112 and a first brightness enhancement film 113 are further disposed in the first housing 10, and the first diffusion plate 112, the first brightness enhancement film 113 and the first grid sheet 111 are sequentially disposed along the optical path of the first surface light source 11. The second casing 20 is further provided with a second diffusion plate 122 and a second brightness enhancement film 123, and the second diffusion plate 122, the second brightness enhancement film 123 and the second grid plate 121 are sequentially disposed along the optical path of the second surface light source 12.
The first diffusion plate 112 and the second diffusion plate 122 make the reflected light irradiated on the surface 31 to be measured more uniform, and the first brightness enhancement film 113 and the second brightness enhancement film 123 can enhance the brightness of the reflected light, which is beneficial to ensuring the accuracy of the detection result.
Further, the surface flatness detection light source provided by the present embodiment further includes a second housing 20. Wherein, an adjusting plate 24 is fixed on the first casing 10, and the second casing 20 is connected on the adjusting plate 24 in a sliding way; the first spectroscope 13 is disposed in the first housing 10, the second spectroscope 23 is disposed in the second housing 20, and the second housing 20 can be driven to slide along a first direction to adjust a distance between the second housing 20 and the first housing 10.
By adjusting the distance between the second casing 20 and the first casing 10, the irradiation position of the reflected light can be adjusted to adapt to the surface 31 to be measured at different positions.
Further, one end of the adjustment plate 24 is fixedly connected to the first housing 10 by a fastener 241; the other end of the adjusting plate 24 is provided with a kidney-shaped groove 242, and the kidney-shaped groove 242 extends along the second direction; the second housing 20 is fixed with an adjusting member 243, and the adjusting member 243 is slidably disposed in the kidney-shaped groove 242. By pushing the second housing 20 in the second direction, the second housing 20 can move in a direction approaching or separating from the first housing 10, and thus the distance between the first beam splitter 13 and the second beam splitter 23 can be adjusted.
In order to improve the stability of the connection between the first housing 10 and the second housing 20, a plurality of fastening members 241 may be uniformly provided in the first direction and the second direction, respectively, to improve the stability between the adjustment plate 24 and the first housing 10; and a plurality of kidney slots 242 are uniformly arranged in the first direction and the second direction, respectively, to improve the motion stability of the second casing 20 with respect to the first casing 10.
It is understood that the fastener 241 and the adjustment member 243 may be both screws.
Further, in this embodiment, a first window 21 is disposed on a side surface of the second housing 20 on the optical path of the reflected light; the first window 21 is light permeable. During detection, the surface to be measured 31 is aligned with the first window 21, so that the reflected light enters the surface to be measured 31 through the first window 21.
Correspondingly, a second window 22 is opened on the side surface of the second shell 20 opposite to the first window 21; the second window 22 is light permeable, and the magnifying lens 221 is disposed in the second window 22. During detection, the imaging device 32 is aligned with the second window 22, the reflected light is reflected to form a secondary reflected light after entering the surface to be detected 31, and a part of the light of the secondary reflected light enters the imaging device 32 through the lens 221 after passing through the second beam splitter 23 to be imaged.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A surface flatness detecting light source, comprising:
a first surface light source for providing first irradiation light in a first direction; a first grid sheet, a first spectroscope and a second spectroscope are arranged on a light path of the first surface light source, and the first illumination light is reflected by the first spectroscope and the second spectroscope in sequence after passing through the first grid sheet and is projected to a surface to be measured to form first strip light;
a second area light source for providing second irradiation light along a second direction; a second grid sheet, a first spectroscope and a second spectroscope are arranged on a light path of the second surface light source, and second illumination light passes through the second grid sheet, then penetrates through the first spectroscope, is reflected by the second spectroscope, and is projected to the surface to be measured to form second strip light;
the first strip light and the second strip light are superposed on the surface to be detected to form a net light.
2. The surface flatness detection light source according to claim 1, comprising a first housing, wherein the first surface light source and the second surface light source are both disposed in the first housing;
the first surface light source and the second surface light source are respectively arranged on two adjacent side surfaces in the first shell, and the first surface light source is perpendicular to the second surface light source.
3. The surface flatness detection light source according to claim 2, wherein a first diffuser plate and a first brightness enhancement film are further disposed in the first housing, and the first diffuser plate, the first brightness enhancement film and the first grid sheet are sequentially disposed along an optical path of the first surface light source.
4. The surface flatness detection light source according to claim 2, wherein a second diffuser plate and a second brightness enhancement film are further disposed in the second housing, and the second diffuser plate, the second brightness enhancement film and the second grid sheet are sequentially disposed along the optical path of the second surface light source.
5. The surface flatness detection light source according to claim 2, further comprising a second housing, wherein an adjustment plate is fixed to the first housing, and the second housing is slidably connected to the adjustment plate;
the first spectroscope is arranged in the first shell, the second spectroscope is arranged in the second shell, and the second shell can be driven to slide in the first direction to be close to or far away from the first shell.
6. The surface flatness detection light source of claim 5, wherein one end of the adjusting plate is fixedly connected to the first housing by a fastener;
the other end of the adjusting plate is provided with a kidney-shaped groove, and the kidney-shaped groove extends along the first direction; an adjusting piece is fixed on the second shell and slidably arranged in the kidney-shaped groove in a penetrating mode.
7. The surface flatness detection light source according to claim 5, wherein the first and second illumination lights are incident on the second beam splitter and then reflected to form a reflected light, and a first window is opened on a side surface of the second housing on a light path of the reflected light;
the first window is light-permeable, and the reflected light is emitted into the surface to be measured through the first window.
8. The surface flatness detection light source of claim 7, wherein a second window is opened on a side surface of the second housing opposite to the first window;
the second window is light-permeable, and a lens increasing body is arranged in the second window; and the reflected light is reflected to form secondary reflected light after being incident on the surface to be measured, and partial light of the secondary reflected light passes through the second beam splitter and then is incident into an imaging device through the antireflection mirror for imaging.
9. The surface flatness detection light source of claim 1, wherein the first beam splitter is tilted to the first illumination light setting, the second beam splitter is tilted to the second illumination light setting, and the first beam splitter is perpendicular to the second beam splitter.
10. The surface flatness detection light source according to claim 1, wherein the first grid sheet is parallel to the first surface light source, and includes a plurality of first grid bars arranged in parallel;
the second grid sheet is parallel to the second surface light source and comprises a plurality of second grid strips which are arranged in parallel;
the first grid strips and the second grid strips are not light-transmitting, and the first grid strips are perpendicular to the second grid strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121419690.6U CN215952490U (en) | 2021-06-24 | 2021-06-24 | Surface flatness detection light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121419690.6U CN215952490U (en) | 2021-06-24 | 2021-06-24 | Surface flatness detection light source |
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| Publication Number | Publication Date |
|---|---|
| CN215952490U true CN215952490U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121419690.6U Active CN215952490U (en) | 2021-06-24 | 2021-06-24 | Surface flatness detection light source |
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| CN (1) | CN215952490U (en) |
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- 2021-06-24 CN CN202121419690.6U patent/CN215952490U/en active Active
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