CN107727012A - A kind of plastic part surface flatness detecting device based on optical diffraction - Google Patents
A kind of plastic part surface flatness detecting device based on optical diffraction Download PDFInfo
- Publication number
- CN107727012A CN107727012A CN201710926440.3A CN201710926440A CN107727012A CN 107727012 A CN107727012 A CN 107727012A CN 201710926440 A CN201710926440 A CN 201710926440A CN 107727012 A CN107727012 A CN 107727012A
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- Prior art keywords
- lens
- detection
- vapor lamp
- plastic part
- detecting device
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- 229920003023 plastic Polymers 0.000 title claims abstract description 23
- 239000004033 plastic Substances 0.000 title claims abstract description 23
- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 37
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 21
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 21
- 239000011734 sodium Substances 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000004888 barrier function Effects 0.000 description 5
- 230000000644 propagated effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001212149 Cathetus Species 0.000 description 1
- 241000831591 Monacoa grimaldii Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a kind of plastic part surface flatness detecting device based on optical diffraction, including detection casing and folding curtain, the detection box house is provided with detection inner chamber, the interior side of the detection inner chamber is provided with sodium vapor lamp, the inside opposite side of the detection inner chamber is provided with receiving screen, side of the receiving screen away from sodium vapor lamp is provided with peephole, and the sodium vapor lamp is provided with adjustable crack plate close to the side of receiving screen.The beneficial effects of the invention are as follows：The present invention uses Fraunhofer diffraction principle, light makes visual light intensity by adjustable crack plate, then light is made to be collimated light beam by the first lens, at this moment for collimated light beam by crack between shield and working of plastics, the light beam passed through is then passed through the second lens, light beam is set to shine on receiving screen, determine whether its surface is smooth by observing the change of sem observation angle of diffraction, it is simple in construction, it is easy to operate, accuracy of detection is high, safe to use portable.
Description
Technical field
The invention belongs to technical field of optical detection, and in particular to a kind of plastic part surface flatness based on optical diffraction
Detection means.
Background technology
Light is in communication process, and when running into barrier or aperture, light will deviate from the approach of straightline propagation and around barrier
The phenomenon propagated below, it is the diffraction of light.Light wave can deviate more or less from geometric optics cathetus biography after running into barrier
Broadcast the phenomenon of law.Geometric optics shows that light is propagated in homogeneous medium by straight-line law, and light is pressed in the interface of two kinds of mediums
Reflection law and the law of refraction are propagated.But a kind of just electromagnetic wave, after light beam is by porose barrier, its intensity
Can feed through in the geometrical shadow area delimited by rectilinear propagation law, also to occur in geometry lighting area some blackenings or
Dark line.In a word, diffraction effect causes the light distribution in space after barrier to be both different from the light distribution that geometric optics provides, again
Light distribution during light wave Free propagation is different from, diffraction intensity has a kind of redistribution.Diffraction causes all geometry film-worlds
Lose bright and sharp edge.Italian physicist and astronomer F.M. Grimaldis accurately describe first in the 17th century
The diffraction phenomena of light, after 150 years, French physician A.-J. Fresnel illustrates this phenomenon earliest in 19th century.
However, often there is certain defect in present working of plastics flatness detecting device when in use：Plastic part surface is put down
It is whole degree detection often through hand touch with magnifying glass amplifying observation, waste time and energy, measurement accuracy is not high, increase the amount of labour, reduce life
Produce efficiency.
The content of the invention
It is an object of the invention to provide a kind of plastic part surface flatness detecting device based on optical diffraction, to solve
In above-mentioned background technology propose detection waste time and energy with measurement accuracy it is not high the problem of.
To achieve the above object, the present invention provides following technical scheme：A kind of plastic part surface based on optical diffraction is put down
Whole degree detection means, including detection casing and folding curtain, the detection box house are provided with detection inner chamber, the detection inner chamber
Interior side is provided with sodium vapor lamp, and the inside opposite side of the detection inner chamber is provided with receiving screen, and the receiving screen is away from sodium vapor lamp
Side is provided with peephole, and the sodium vapor lamp is provided with adjustable crack plate close to the side of receiving screen, and the adjustable crack plate is remote
The side of sodium vapor lamp is provided with the first lens, and side of the receiving screen away from peephole is provided with the second lens, and described first is saturating
Upper surface between mirror and the second lens is provided with shield, is provided with erecting bed below the shield, and the two of the erecting bed
Side is provided with clamping plate, and the folding curtain is provided with two altogether, and two folding curtains are separately mounted to the side position of lower surface two of erecting bed,
The lower surface centre position of the erecting bed is provided with expansion link, and the sodium vapor lamp is electrically connected with external power source.
Preferably, slide rail is provided among the surface of the detection casing, hermatic door is provided between two slide rails.
Preferably, the middle crack of the adjustable crack plate is less than 0. 1 millimeters.
Preferably, the first lens and the second lens insertion is arranged on the inside of detection inner chamber.
Preferably, the surface of the slide rail and detection casing is fixed by electric welding connection.
Preferably, the center of the center of slit on the adjustable crack plate, the center of the first lens and the second lens is equal
It is located along the same line.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention uses Fraunhofer diffraction principle, saturating by first
The center of mirror and the second lens are centrally located on same straight line, and the slit width on adjustable crack plate is less than 0.1mm, ensures to spread out
Penetrate clear-cut texture and visual field light intensity；The center at the center of the slit on adjustable crack plate, the center of the first lens and the second lens
It is located along the same line, adjustable crack plate is located on the focal plane of the first lens, and the light for ensureing to incide on slit to be measured is flat
Row light beam, hermatic door is opened, working of plastics to be measured is arranged on erecting bed, is fixed by clamping plate, the height of adjustable telescopic rod
Degree makes the lower surface of working of plastics and shield form tiny crack, and sodium vapor lamp lights, and light makes visual light intensity by adjustable crack plate, so
Light is set to be collimated light beam by the first lens afterwards, at this moment collimated light beam is by crack between shield and working of plastics, the light passed through
Beam is then passed through the second lens, light beam is shone on receiving screen, by observing whether the change of sem observation angle of diffraction determines its surface
Smooth, simple in construction, easy to operate, accuracy of detection is high, safe to use portable.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the outer surface structure schematic diagram of the present invention.
In figure：1st, sodium vapor lamp；2nd, casing is detected；3rd, adjustable crack plate；4th, inner chamber is detected；5th, the first lens；6th, curtain is rolled over；7th, stretch
Contracting bar；8th, erecting bed；9th, clamping plate；10th, the second lens；11st, receiving screen；12nd, peephole；13rd, shield；14th, slide rail；15th, seal
Door.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-2 is referred to, the present invention provides following technical scheme：A kind of plastic part surface flatness based on optical diffraction
Detection means, including detection casing 2 and folding curtain 6, detection casing 2 are internally provided with detection inner chamber 4, detect the inside one of inner chamber 4
Side is provided with sodium vapor lamp 1, and the inside opposite side of detection inner chamber 4 is provided with receiving screen 11, and side of the receiving screen 11 away from sodium vapor lamp 1 is set
Have a peephole 12, sodium vapor lamp 1 is provided with adjustable crack plate 3 close to the side of receiving screen 11, adjustable crack plate 3 away from sodium vapor lamp 1 one
Side is provided with the first lens 5, and side of the receiving screen 11 away from peephole 12 is provided with the second lens 10, the first lens 5 and second
Upper surface between lens 10 is provided with shield 13, and the lower section of shield 13 is provided with erecting bed 8, and the both sides of erecting bed 8 are provided with
Clamping plate 9, folding curtain 6 is provided with two altogether, and two folding curtains 6 are separately mounted to the side position of lower surface two of erecting bed 8, erecting bed 8
Lower surface centre position be provided with expansion link 7, sodium vapor lamp 1 is electrically connected with external power source.
Working of plastics is detected in order to facilitate installation, in of the invention, it is preferred that be provided with slide rail among the surface of detection casing 2
14, hermatic door 15 is provided between two slide rails 14.
For the ease of observing, in the present invention, it is preferred that the middle crack of adjustable crack plate 3 is less than 0. 1 millimeters.
In order to facilitate installation, in the present invention, it is preferred that the first lens 5 and the insertion of the second lens 10 are arranged on detection inner chamber 4
Inside.
In order to increase stability, in of the invention, it is preferred that the surface of slide rail 14 and detection casing 2 is consolidated by electric welding connection
It is fixed.
In order to improve detection accuracy, in of the invention, it is preferred that the center of the slit on adjustable crack plate 3, the first lens
5 center and the center of the second lens 10 are respectively positioned on same straight line.
The operation principle and process for using of the present invention：After the present invention installs, user of service is by the center of the first lens 5
It is centrally located at the second lens 10 on same straight line, the slit width on adjustable crack plate 3 is less than 0.1mm, ensures diffraction bar
Line clearly with visual field light intensity；The centre bit at the center of the slit on adjustable crack plate, the center of the first lens 5 and the second lens 10
In on same straight line, adjustable crack plate is located on the focal plane of the first lens 5, and it is parallel to ensure to incide the light on slit to be measured
Light beam, hermatic door 15 is opened, working of plastics to be measured is arranged on erecting bed 8, is fixed by clamping plate 9, adjustable telescopic rod 7
The lower surface of working of plastics and shield 13 is formed tiny crack, close hermatic door 15, open controlling switch, sodium vapor lamp 1 is luminous,
Light makes visual light intensity by adjustable crack plate 3, then makes light be collimated light beam by the first lens 5, at this moment collimated light beam
By crack between shield 13 and working of plastics, the light beam passed through is then passed through the second lens 10, light beam is shone on receiving screen 11, leads to
Cross the observation angle of diffraction change of peephole 12 and determine whether its surface is smooth, it is safe to use portable.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of plastic part surface flatness detecting device based on optical diffraction, including detection casing（2）With folding curtain（6）, its
It is characterised by：The detection casing（2）It is internally provided with detection inner chamber（4）, the detection inner chamber（4）Interior side be provided with
Sodium vapor lamp（1）, the detection inner chamber（4）Inside opposite side be provided with receiving screen（11）, the receiving screen（11）Away from sodium vapor lamp（1）
Side be provided with peephole（12）, the sodium vapor lamp（1）Close to receiving screen（11）Side be provided with adjustable crack plate（3）, institute
State adjustable crack plate（3）Away from sodium vapor lamp（1）Side be provided with the first lens（5）, the receiving screen（11）Away from peephole
（12）Side be provided with the second lens（10）, first lens（5）With the second lens（10）Between upper surface be provided with
Shield（13）, the shield（13）Lower section be provided with erecting bed（8）, the erecting bed（8）Both sides be provided with clamping plate（9）,
The folding curtain（6）Two, and two folding curtains are provided with altogether（6）It is separately mounted to erecting bed（8）The side position of lower surface two, it is described
Erecting bed（8）Lower surface centre position be provided with expansion link（7）, the sodium vapor lamp（1）It is electrically connected with external power source.
2. a kind of plastic part surface flatness detecting device based on optical diffraction according to claim 1, its feature exist
In：The detection casing（2）Surface among be provided with slide rail（14）, two slide rails（14）Between be provided with hermatic door
（15）.
3. a kind of plastic part surface flatness detecting device based on optical diffraction according to claim 1, its feature exist
In：The adjustable crack plate（3）Middle crack be less than 0. 1 millimeters.
4. a kind of plastic part surface flatness detecting device based on optical diffraction according to claim 1, its feature exist
In：First lens（5）With the second lens（10）It is embedded to be arranged on detection inner chamber（4）Inside.
5. a kind of plastic part surface flatness detecting device based on optical diffraction according to claim 1, its feature exist
In：The slide rail（14）With detection casing（2）Surface fixed by electric welding connection.
6. a kind of plastic part surface flatness detecting device based on optical diffraction according to claim 1, its feature exist
In：The adjustable crack plate（3）On the center of slit, the first lens（5）Center and the second lens（10）The equal position in center
In on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710926440.3A CN107727012A (en) | 2017-10-07 | 2017-10-07 | A kind of plastic part surface flatness detecting device based on optical diffraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710926440.3A CN107727012A (en) | 2017-10-07 | 2017-10-07 | A kind of plastic part surface flatness detecting device based on optical diffraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107727012A true CN107727012A (en) | 2018-02-23 |
Family
ID=61209034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710926440.3A Pending CN107727012A (en) | 2017-10-07 | 2017-10-07 | A kind of plastic part surface flatness detecting device based on optical diffraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107727012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091658A (en) * | 2021-04-12 | 2021-07-09 | 广东工业大学 | Laser diffraction surface roughness profiler based on area array charge coupled device |
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| JP2008002891A (en) * | 2006-06-21 | 2008-01-10 | Canon Inc | Surface state inspection device and surface state inspection method |
| CN101425455A (en) * | 2007-11-01 | 2009-05-06 | 株式会社半导体能源研究所 | Semiconductor substrate and method for manufacturing the same, and method for manufacturing semiconductor device |
| CN101608905A (en) * | 2009-07-21 | 2009-12-23 | 清华大学 | A kind of measuring method of little opening displacement of microcrack |
| CN101881607A (en) * | 2010-06-10 | 2010-11-10 | 上海理工大学 | Planar error detection system |
| CN203422066U (en) * | 2013-08-05 | 2014-02-05 | 哈尔滨学院 | Device for measuring infinitesimal based on optical diffraction |
| CN105328331A (en) * | 2015-11-10 | 2016-02-17 | 哈尔滨工程大学 | Strong-focusing optical system used for composite machining of laser turning and grinding and machining method |
-
2017
- 2017-10-07 CN CN201710926440.3A patent/CN107727012A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002891A (en) * | 2006-06-21 | 2008-01-10 | Canon Inc | Surface state inspection device and surface state inspection method |
| CN101425455A (en) * | 2007-11-01 | 2009-05-06 | 株式会社半导体能源研究所 | Semiconductor substrate and method for manufacturing the same, and method for manufacturing semiconductor device |
| CN101608905A (en) * | 2009-07-21 | 2009-12-23 | 清华大学 | A kind of measuring method of little opening displacement of microcrack |
| CN101881607A (en) * | 2010-06-10 | 2010-11-10 | 上海理工大学 | Planar error detection system |
| CN203422066U (en) * | 2013-08-05 | 2014-02-05 | 哈尔滨学院 | Device for measuring infinitesimal based on optical diffraction |
| CN105328331A (en) * | 2015-11-10 | 2016-02-17 | 哈尔滨工程大学 | Strong-focusing optical system used for composite machining of laser turning and grinding and machining method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091658A (en) * | 2021-04-12 | 2021-07-09 | 广东工业大学 | Laser diffraction surface roughness profiler based on area array charge coupled device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180223 |
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