CN108459419A - Filter aperture alignment adjusting apparatus based on optical grating diffraction and method - Google Patents
Filter aperture alignment adjusting apparatus based on optical grating diffraction and method Download PDFInfo
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- CN108459419A CN108459419A CN201810045968.4A CN201810045968A CN108459419A CN 108459419 A CN108459419 A CN 108459419A CN 201810045968 A CN201810045968 A CN 201810045968A CN 108459419 A CN108459419 A CN 108459419A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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Abstract
Filter aperture based on optical grating diffraction is directed at adjusting apparatus, and composition includes：One insertable transmission grating for being close to place before filter aperture；The diffracted beam direction that detector is placed in the transmission grating constitutes imaging system, and the output of the detector connects computer.Computer control needs the filter aperture that auto-collimation adjusts.The present invention has the characteristics that equipment letter, adjustment are easy and with high accuracy.
Description
Technical field
The invention belongs to device of high power laser technical fields, especially one kind light path in device of high power laser
In two spaces filter aperture alignment adjusting apparatus and method.
Background technology
God Light П currently used for the device of high power laser of inertial confinement fusion, such as China both at home and abroad, the U.S.
NIF devices, the two spaces filter aperture alignment adjustment that will be related in a light path.Traditional filter aperture alignment
Technology monitors system using a far field is established behind the leaky mirror of main optical path, is inserted at light path two respectively recessed
Lens realization, as depicted in figs. 1 and 2.Traditional filter aperture alignment procedures are as follows, first before the first spatial filter 2
Concavees lens 1 are inserted into, as shown in Figure 1, parallel laser is completely filled with filter aperture 3 after the diverging of concavees lens 1, then filter is small
The profile in hole 3 is ultimately imaged by slightly bigger filter aperture 6 on far field detection device 9, and filter aperture 3 is obtained
Center location information.Concavees lens 1 are removed later, concavees lens 4 are inserted into before second space filter 5, as shown in Fig. 2, light exists
It is completely filled with filter aperture at filter aperture 6, is ultimately imaged on far field detection device 9, far field detection device 9 records aperture 6
Center location information.By comparing small hole center location information twice, mobile aperture realizes the aperture to two filters
It is aligned.
This scheme is more demanding to filter aperture, and it is small that previous filter aperture is necessarily less than the latter filter
Hole, otherwise cannot achieve alignment.
Invention content
The present invention technology be to overcome above-mentioned problem of the prior art, it is small to provide a kind of filter based on optical grating diffraction
Hole is directed at adjusting apparatus, which has the characteristics that equipment letter, adjustment are easy, with high accuracy.
Technical solution of the invention is as follows：
A kind of filter aperture alignment adjusting apparatus based on optical grating diffraction, includes the first filtering being sequentially placed along light path
Device aperture, second filter aperture and speculum, feature are, are placed in the front for being close to the second filter aperture
There is transmission grating, the second detector is placed in the diffracted beam direction of the transmission grating, the external computer of the second detector,
The computer is connected with the first filter aperture and second filter aperture respectively.
It is realized in device of high power laser and is filtered using the filter aperture alignment adjusting apparatus based on optical grating diffraction
Wave device aperture alignment methods, feature is, includes the following steps：
1. being close to its aperture before second filter aperture places transmission grating, make the center of second filter aperture
It is overlapped with the center of transmission grating；
2. opening laser, laser is reflected by projection grating on the second detector, and the second detector will collect coke
Spot, which is used as, refers to optical axis position, and focal spot position is transmitted to computer；
3. the first concavees lens are placed in the light path between laser and the first lens, so that transmission grating is generated level-one and spread out
Light is penetrated, first filter aperture profile is imaged on the second detector, and the second detector is by first filter aperture contour images
It is transmitted to computer；
4. according to the first filter aperture contour images presented on computer, first filter aperture is adjusted, makes first
Filter aperture contour images center is overlapped with reference optical axis position；
5. first concavees lens are removed light path, and convex anti-mirror is moved into the light between the 4th lens and speculum
On the road, make laser after the anti-mirror reflection of excess convexity, transmission grating is injected by second filter aperture, transmission grating is made to generate level-one
Second filter aperture profile is imaged on the second detector by diffraction light, and the second detector is by second filter aperture profile diagram
As being transmitted to computer；
6. according to the second filter aperture contour images presented on computer, second filter aperture is adjusted, makes second
Filter aperture contour images center is overlapped with reference optical axis position.
Technique effect of the invention is as follows compared with prior art：
1) by the transmission grating placed before being close to filter aperture, the first-order diffraction light that transmission grating generates makes filtering
Device aperture profile is imaged on the detector, according to the aperture contour images on detector, accurately by filter aperture profile tune
It is easy to operate into detector center.
2) have the characteristics that equipment letter, adjustment are easy, with high accuracy.
Description of the drawings
Fig. 1 is the light path schematic diagram of traditional filter aperture alignment adjusting apparatus alignment first filter aperture.
Fig. 2 is the light path schematic diagram of traditional filter aperture alignment adjusting apparatus alignment second filter aperture.
Fig. 3 is the filter aperture alignment adjusting apparatus alignment first filter aperture of base transmission grating diffraction of the present invention
Light path schematic diagram.
Fig. 4 is the filter aperture alignment adjusting apparatus alignment second filter aperture of base transmission grating diffraction of the present invention
Light path schematic diagram.
In figure：1- the first concavees lens 2- the first lens 3- first filter aperture the second lens of 4- 5- second
The 4th far fields lens 9- speculum 10- shrink beam lens of concavees lens 6- the third lens 7- second filter apertures 8-
The convex anti-mirrors of 11- the first detector 12- the second detector 13- transmission gratings 14-
Specific implementation mode
With reference to embodiment and attached drawing, the invention will be further described, but the protection model of the present invention should not be limited with this
It encloses.
First please refer to Fig. 3 and Fig. 4, it is illustrated that be that the present invention is based on the light that the filter aperture of optical grating diffraction is directed at adjusting apparatus
Road schematic diagram, as seen from the figure, the present invention is based on the filter apertures of optical grating diffraction to be directed at adjusting apparatus, and composition includes：
One is close to the transmission grating placed before filter aperture 7 13；
The diffracted beam direction that the transmission grating 13 is placed in by the second detector 12 constitutes imaging system, and described the
The output of two detectors 12 connects a computer；
The filter aperture 3 and filter aperture 7 for needing auto-collimation adjustment of computer control.
It is realized in device of high power laser and is filtered using the filter aperture alignment adjusting apparatus based on optical grating diffraction
Wave device aperture alignment methods, it is characterised in that include the following steps：
1. being close to its aperture before second filter aperture 7 places transmission grating 13, make second filter aperture
Center and the center of transmission grating 13 overlap；
2. opening laser, laser is reflected by transmission grating 13 on the second detector 12, and the second detector 12 will be adopted
Collect focal spot to be used as with reference to optical axis position, focal spot position is transmitted to computer, confirms optical axis position；
3. the first concavees lens 1 are inserted into the light path between laser and the first lens 2, transmission grating 13 is made to generate one
Order diffraction light, 3 profile of first filter aperture are imaged on the second detector 12, and the second detector 12 is by first filter aperture
3 contour images are transmitted to computer；
4. according to 3 contour images of first filter aperture presented on computer, adjustment first filter aperture 3 makes the
One filter aperture profile, 3 image center location is overlapped with reference optical axis position；
5. first concavees lens 1 are removed into light path, and by convex anti-mirror 14 move into the 4th lens 8 and speculum 9 it
Between light path on, make laser after the anti-mirror 14 of excess convexity reflects, transmission grating 13 injected by second filter aperture 7, makes transmission
Grating 13 generates first-order diffraction light, and 7 profile of second filter aperture is imaged on the second detector 12, and the second detector 12 is by the
Two filter apertures, 7 contour images are transmitted to computer；
6. according to 7 contour images of second filter aperture presented on computer, adjustment second filter aperture 7 makes the
Two filter apertures, 7 contour images center is overlapped with reference optical axis position.
In conclusion apparatus of the present invention and method have the characteristics that equipment letter, adjustment are easy, with high accuracy.
Claims (2)
- Include the first filter being sequentially placed along light path 1. a kind of filter aperture based on optical grating diffraction is directed at adjusting apparatus Aperture, second filter aperture and speculum, which is characterized in that be close to be placed in front of the second filter aperture Transmission grating is placed with the second detector in the diffracted beam direction of the transmission grating, the external computer of the second detector, should Computer is connected with the first filter aperture and second filter aperture respectively.
- 2. realizing that high power laser light fills using the filter aperture alignment adjusting apparatus described in claim 1 based on optical grating diffraction Set median filter aperture alignment methods, which is characterized in that include the following steps：1. be close to before second filter aperture its aperture place transmission grating, make second filter aperture center and thoroughly The center for penetrating grating overlaps；2. opening laser, laser is reflected by transmission grating on the second detector, and the second detector will collect focal spot work For reference optical axis position, and it is transmitted to computer；3. the first concavees lens are placed in the light path between laser and the first lens, transmission grating is made to generate first-order diffraction Light, first filter aperture profile are imaged on the second detector, and the second detector passes first filter aperture contour images Transport to computer；4. according to the first filter aperture contour images presented on computer, first filter aperture is adjusted, the first filtering is made Device aperture contour images center is overlapped with reference optical axis position；5. first concavees lens are removed light path, and convex anti-mirror is moved into the light path between the 4th lens and speculum On, make laser after the anti-mirror reflection of excess convexity, transmission grating is injected by second filter aperture, so that transmission grating is generated level-one and spread out Light is penetrated, second filter aperture profile is imaged on the second detector, the second detector is by second filter aperture contour images It is transmitted to computer；6. according to the second filter aperture contour images presented on computer, second filter aperture is adjusted, the second filtering is made Device aperture contour images center is overlapped with reference optical axis position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045968.4A CN108459419B (en) | 2018-01-17 | 2018-01-17 | Filter pinhole alignment adjusting device and method based on grating diffraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045968.4A CN108459419B (en) | 2018-01-17 | 2018-01-17 | Filter pinhole alignment adjusting device and method based on grating diffraction |
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| CN108459419A true CN108459419A (en) | 2018-08-28 |
| CN108459419B CN108459419B (en) | 2020-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197943A (en) * | 2020-09-17 | 2021-01-08 | 中国科学院上海光学精密机械研究所 | High-precision off-line debugging method for high-power laser far-field imaging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112197943A (en) * | 2020-09-17 | 2021-01-08 | 中国科学院上海光学精密机械研究所 | High-precision off-line debugging method for high-power laser far-field imaging system |
| CN112197943B (en) * | 2020-09-17 | 2022-03-08 | 中国科学院上海光学精密机械研究所 | High-precision off-line debugging method for high-power laser far-field imaging system |
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