CN1122456A - Variable-angle-spacing optical beam splitting method and beam splitting and imaging device - Google Patents
Variable-angle-spacing optical beam splitting method and beam splitting and imaging device Download PDFInfo
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- CN1122456A CN1122456A CN 94113627 CN94113627A CN1122456A CN 1122456 A CN1122456 A CN 1122456A CN 94113627 CN94113627 CN 94113627 CN 94113627 A CN94113627 A CN 94113627A CN 1122456 A CN1122456 A CN 1122456A
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- beam splitting
- phase grating
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- angular separation
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- 230000003287 optical effect Effects 0.000 title claims abstract description 17
- 238000003384 imaging method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 8
- 238000005286 illumination Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
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Abstract
The invention belongs to the technical field of optics, and relates to a variable-angle-spacing isocandela beam splitting method and a distribution and imaging optical device. The problem that the angular spacing between the light beams cannot be changed when only the phase grating is used for beam splitting is solved. When the phase grating is illuminated by spherical wave and collimated by lens, when the phase grating moves along the optical axis direction, the angular space between every two adjacent beams after beam splitting can be changed, and two groups of lenses and phase grating can be used to form variable-angular-space beam splitting device and variable-angular-space imaging device.
Description
The invention belongs to optical technical field, relate to method and the beam splitting and the imaging optical device of a kind of angular separation-varying isocandela beam splitting.
The isocandela beam-splitting method proposes (Opt.Commun.1971.Vol 3.No5.P312-315) by Germany scientist Dammann the earliest, he is divided into multi beam to a branch of smooth isocandela ground with a phase grating, beam split in this way, the angular separation between adjacent beams i.e. two adjacent angle of beams are fixed.This angle was determined by the cycle of phase grating.It can only design according to the requirement of real system, process.To requiring the different system of splitting angle spacing, can't replace, lack versatility and dirigibility.
The purpose of this invention is to provide the variable isocandela beam-splitting method of a kind of angular separation and beam splitting and imaging device.Arbitrarily change the angular separation between each light beam after the beam splitting within the specific limits.
Method of the present invention adopts the spherical wave illumination phase grating, with lens spherical wave is collimated again, forms aplanatic beam array, and when when optical axis moves phase grating, the angular separation after the beam splitting between each light beam changes thereupon.Optical beam splitting device of the present invention comprises: monochromatic source, phase grating are placed on the phase grating that is used for beam splitting in the middle of two groups of lens.Phase grating is when optical axis direction moves, and the spot size of each light beam does not change, but its angular separation changes thereupon.Angular separation-varying of the present invention becomes many picture devices, and it comprises: monochromatic source, phase grating, monochromatic source illumination object plane constitutes imaging system by two groups of lens, and phase grating is placed between two groups of lens, forms a plurality of pictures on image planes.Object plane, image planes, as the situation of size constancy under, the distance between the adjacent picture is along with phase grating moves and changes along optical axis direction.
Good effect of the present invention is that phase grating beam splitting and traditional optical system are combined, and can continuously change the angular separation between each light beam after the beam splitting in scope of design.Thereby reach the purpose that substitutes a series of different cycles phase gratings.When especially this system constituted the many pictures of thing one-tenth system, it can not change under the object-image relation prerequisite, continuously changes the distance between each picture, has very strong dirigibility and practicality.
Fig. 1 is the embodiment and the fundamental diagram of beam splitting arrangement of the present invention.Monochromatic source 1 can be selected LASER Light Source for use, and lens combination 2 and 4 can adopt single element lens.Laser beam 1 is after lens 2 are assembled, produce a spherical wave, spherical wave is after phase grating 3 beam splitting, lens 4 are imaged on the virtual image of beam array point on the front focal plane of lens 4, its picture point can be considered a point source, by Fourier optics as can be known, every bit on the front focal plane, a certain specific spatial frequency on corresponding its back focal plane, the promptly corresponding plane wave front light beam of propagating by a special angle, distance on the front focal plane between any 2 virtual image points changes, and means that corresponding two angle of beams change on the back focal plane.There is one-to-one relationship in the two.By geometrical optics as can be known, when when optical axis direction moves phase grating 3, after phase grating 3 beam splitting again through the virtual image point of each light beam of lens 4 imagings all the time on the front focal plane of lens 4.Phase grating 3 between two lens when optical axis direction moves, change in the spacing between each picture point on lens 4 front focal planes thereupon.Therefore, the angular separation between each light beam after this system's beam splitting is also along with continuously changing.
Fig. 2 is that an embodiment, lens 2 and the lens 4 that the present invention becomes many picture devices constitute an imaging system, object plane 1 is respectively to become many object plane and image planes as system with image planes 5, phase grating is placed between lens 2 and the lens 4, make the thing on the object plane 1 on image planes 5, become a plurality of pictures, when when optical axis direction moves phase grating 3, the distance on the image planes 5 between each picture also changes thereupon.
Claims (3)
1, a kind of optical beam splitting method that is used for angular separation-varying, it is characterized in that: use the spherical wave illumination phase grating, with lens spherical wave is collimated again, form aplanatic beam array, when when optical axis moves phase grating, the angular separation after the beam splitting between each light beam changes thereupon.
2, a kind of angular separation-varying optical beam splitting device, it comprises monochromatic source, phase grating, it is characterized in that: the phase grating that is used for beam splitting is placed in the middle of two groups of lens.
3, a kind of angular separation-varying becomes many picture devices, and it comprises monochromatic source, phase grating, it is characterized in that: monochromatic source illumination object plane, constitute imaging system by two groups of lens, and phase grating is placed between two groups of lens, on image planes, form a plurality of pictures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94113627 CN1053969C (en) | 1994-10-31 | 1994-10-31 | Variable-angle-spacing optical beam splitting method and beam splitting and imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94113627 CN1053969C (en) | 1994-10-31 | 1994-10-31 | Variable-angle-spacing optical beam splitting method and beam splitting and imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1122456A true CN1122456A (en) | 1996-05-15 |
| CN1053969C CN1053969C (en) | 2000-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94113627 Expired - Fee Related CN1053969C (en) | 1994-10-31 | 1994-10-31 | Variable-angle-spacing optical beam splitting method and beam splitting and imaging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053969C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344267A (en) * | 2017-07-17 | 2017-11-14 | 中山瑞科新能源有限公司 | A kind of solar panel laser scribing device |
| CN117444385A (en) * | 2023-12-21 | 2024-01-26 | 武汉引领光学技术有限公司 | Laser shaping processing device with continuously adjustable shaping light spots and adjusting method thereof |
-
1994
- 1994-10-31 CN CN 94113627 patent/CN1053969C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344267A (en) * | 2017-07-17 | 2017-11-14 | 中山瑞科新能源有限公司 | A kind of solar panel laser scribing device |
| CN117444385A (en) * | 2023-12-21 | 2024-01-26 | 武汉引领光学技术有限公司 | Laser shaping processing device with continuously adjustable shaping light spots and adjusting method thereof |
| CN117444385B (en) * | 2023-12-21 | 2024-03-29 | 武汉引领光学技术有限公司 | Laser shaping processing device with continuously adjustable shaping light spots and adjusting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1053969C (en) | 2000-06-28 |
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| 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 |