CN2679645Y - Calculating holographic non-spherical interference measurer for LED device - Google Patents
Calculating holographic non-spherical interference measurer for LED device Download PDFInfo
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- CN2679645Y CN2679645Y CNU2004200254688U CN200420025468U CN2679645Y CN 2679645 Y CN2679645 Y CN 2679645Y CN U2004200254688 U CNU2004200254688 U CN U2004200254688U CN 200420025468 U CN200420025468 U CN 200420025468U CN 2679645 Y CN2679645 Y CN 2679645Y
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- lcd
- liquid crystal
- crystal display
- mirror
- aspheric surface
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 14
- 230000035515 penetration Effects 0.000 claims description 6
- 239000004606 Fillers/Extenders Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- MJVAVZPDRWSRRC-UHFFFAOYSA-N Menadione Chemical compound C1=CC=C2C(=O)C(C)=CC(=O)C2=C1 MJVAVZPDRWSRRC-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The utility model discloses a calculating holographic non-spherical interference measurer for an LED device, which is characterized in that the utility model uses an LED device as a recording medium of a calculating hologram in a Twyman-Green interferometer or a Fizeau interferometer system and utilizes the operation of a computer to produce and provide a standard templet-calculating hologram required during detecting non-spherical or spherical surfaces in real time. The utility model has the advantages of convenient and simple operation, high accuracy, time and labor saving and high work efficiency, realizes the rapid and real-time detection for non-spherical interference, and can be widely used for factories and scientific researching universities and colleges.
Description
One, technical field
The utility model relates to a kind of calculation holographic optical interferometry instrument, particularly a kind of calculation holographic aspheric surface interference measuring instrument with liquid crystal display device.
Two, background technology
Calculation holographic claims the computing mechanism hologram again, and it is to be based upon on the basis of computing machine and optical holography, and it does not need the physical presence of object, but after the mathematical description of the object wave input Computer Processing, control plotting apparatus or other display device are made.Its maximum characteristics are as long as the mathematical model before the object wave is known, just can produce the diffraction that does not in fact have object, thereby it can accurately provide required " standard jig " in aspheric surface or the sphere detection.At present, the prior art relevant with the utility model is as " calculation holographic is used for the test of Si Mite non-spherical lens " (Liu Liang reads, light instrument technology .-1991).It is Tai Man-Green's interferometer of correction type that its measurement mechanism constitutes, this method adopts the zero-bit optical element to add the combined compensation detection method of computed hologram, promptly finish initial compensation first with the spherical aberration and the accurate zero-bit optical system of manufacturing of lens, the overwhelming majority of aspheric surface mirror wave difference is compensated, remaining ripple difference compensates with computed hologram again, through this combined compensation, can sensing range bigger aspheric surface mirror wave is poor, and the test effect is also better.Then whole interferometer system is carried out ray tracing, the ripple of obtaining on the photographic negative plane is poor, makes required computed hologram at last.The deficiency that this method in use exists is: because wherein the computed hologram recording medium used therefor is a photographic negative, therefore be the computed hologram of egative film for making a width of cloth medium, must draw earlier, then with the miniature method of taking a picture, its reproduction to photographic negative, the time that this process spent is longer, so it can not produce computed hologram in real time, should this limit its application in handling in real time.
Three, summary of the invention
It is a kind of by computer control that the purpose of this utility model is to provide, and produces the calculation holographic aspheric surface interference measuring instrument with liquid crystal display device of computed hologram fast, in real time.
The purpose of this utility model is achieved through the following technical solutions.With the calculation holographic aspheric surface interference measuring instrument of liquid crystal display device adopt safe graceful-Green's interferometer system structure, it comprises laser instrument, reflective mirror, lens, diaphragm, extender lens, spectroscope, offset lens, tested aspheric mirror, piezoelectric crystal, power supply, convergent mirror, spatial filter, photoelectric coupled device and computing machine, the vertex curvature center of tested aspheric mirror and the focus of offset lens overlap, it is characterized in that: on the light path between spectroscope and the convergent mirror, be provided with the LCD of recorded hologram, LCD can be the light penetration type liquid crystal display, also can be the backlight LCD, the electronics output terminal of LCD links to each other with computing machine.The utility model be Thailand graceful-Green's interferometer system or the structural improvement of Pei's rope interferometer system.Adopt the recording medium of LCD in the system as hologram, same in actual measurement, to adopt the zero compensation system to compensate earlier and could realize that zero-bit detects.Promptly adopt the zero-bit optical element to add the combined compensation detection method of computed hologram, spherical aberration and the accurate zero-bit optical system of manufacturing with lens are finished initial compensation, the overwhelming majority of aspheric surface mirror wave difference is compensated, remaining ripple difference compensates with making simple computed hologram again, then whole interferometer system is carried out ray tracing, obtain the ripple difference expression formula φ (x on the LCD plane, y), can ask for the shape and the position of striped by computing machine according to the numerical value process of iteration, thereby produce required computed hologram, and be presented on the LCD TV.In addition, be the corrugated of process zero-bit optical compensating system by what returned interferometer by microscopy light path arm, it enters LCD after the spectroscope reflection, with computed hologram stack on the LCD, form the stack interference image.Then, the stack interference image is received by spatial filter, photoelectrical coupler through convergent lens again, is drawn the error of tested aspheric surface at last by COMPUTER CALCULATION.
The utility model compared with prior art its significant effect is: adopt the recording medium of LCD as computed hologram in detecting light path, and utilize computer operation to produce and provide required standard jig---computed hologram in aspheric surface or the sphere detection in real time, simple to operation, degree of accuracy is high, time saving and energy saving, improved work efficiency greatly, realized aspheric surface is carried out quick, real-time detection.
Four, description of drawings
Fig. 1 is the calculation holographic aspheric surface interference measuring instrument system global structure figure of employing light penetration type liquid crystal display device described in the utility model.
Fig. 2 is the calculation holographic aspheric surface interference measuring instrument system global structure figure of employing backlight liquid crystal display device described in the utility model.
Five, embodiment
Below in conjunction with accompanying drawing concrete structure of the present utility model is described in further detail.
Referring to Fig. 1, the calculation holographic aspheric surface interference measuring instrument of liquid crystal display device described in the utility model is made up of laser instrument 1, reflective mirror 2, lens 3, diaphragm 4, extender lens 5, spectroscope 6, offset lens 7, tested aspheric surface 8, piezoelectric crystal 9, power supply 10, convergent lens 11, spatial filter 12, photoelectric coupled device 13, computing machine 14, LCD 15.The positional structure of each components and parts is pressed Thailand, and graceful-Green's interferometer system structure is provided with, wherein, the vertex curvature center of tested aspheric mirror 8 and the focus of offset lens 7 overlap, LCD 15 adopts the light penetration type liquid crystal display, also can adopt the light penetration type liquid crystal display, when adopting the light penetration type liquid crystal display, it is arranged on the light path between spectroscope 6 reflection backs and the convergent mirror 11, the computed hologram that tested aspheric surface interferogram and computing machine provide superposes at LCD 15 places, when adopting the backlight LCD, LCD 15 is arranged on the light path behind the beam-splitter 16, see Fig. 2, at this moment, the computed hologram that tested aspheric surface interferogram and computing machine provide is that the output of LCD 15 links to each other with computing machine 14 in the stack of beam-splitter 16 places.The utility model also is applicable to Pei's rope interferometer system.
Claims (3)
1, a kind of calculation holographic aspheric surface interference measuring instrument with liquid crystal display device, it comprises laser instrument [1], reflective mirror [2], lens [3], diaphragm [4], extender lens [5], spectroscope [6], offset lens [7], tested aspheric mirror [8], piezoelectric crystal [9], power supply [10], convergent mirror [11], spatial filter [12], photoelectric coupled device [13] and computing machine [14], the focus of the vertex curvature center of tested aspheric mirror [8] and offset lens [7] overlaps, it is characterized in that: the light path between spectroscope [6] and the convergent mirror [11] is provided with the LCD [15] that is used for recorded hologram, and the electronics output terminal of LCD [15] links to each other with computing machine.
2, the calculation holographic aspheric surface interference measuring instrument with liquid crystal display device according to claim 1 is characterized in that LCD [15] adopts the light penetration type liquid crystal display.
3, the calculation holographic aspheric surface interference measuring instrument with liquid crystal display device according to claim 1 is characterized in that LCD [15] adopts the backlight LCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200254688U CN2679645Y (en) | 2004-03-17 | 2004-03-17 | Calculating holographic non-spherical interference measurer for LED device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200254688U CN2679645Y (en) | 2004-03-17 | 2004-03-17 | Calculating holographic non-spherical interference measurer for LED device |
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| Publication Number | Publication Date |
|---|---|
| CN2679645Y true CN2679645Y (en) | 2005-02-16 |
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| CNU2004200254688U Expired - Fee Related CN2679645Y (en) | 2004-03-17 | 2004-03-17 | Calculating holographic non-spherical interference measurer for LED device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374851A (en) * | 2011-09-22 | 2012-03-14 | 西安工业大学 | Real-time partial zero compensation optical aspheric surface profile detection method |
| CN102607454A (en) * | 2011-02-24 | 2012-07-25 | 南京理工大学 | Optical freeform surface interference detection system |
-
2004
- 2004-03-17 CN CNU2004200254688U patent/CN2679645Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607454A (en) * | 2011-02-24 | 2012-07-25 | 南京理工大学 | Optical freeform surface interference detection system |
| CN102374851A (en) * | 2011-09-22 | 2012-03-14 | 西安工业大学 | Real-time partial zero compensation optical aspheric surface profile detection method |
| CN102374851B (en) * | 2011-09-22 | 2013-05-22 | 西安工业大学 | Real-time partial zero compensation optical aspheric surface profile detection method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |