CN1005084B - Light beam traversing device and adjusting method thereof - Google Patents
Light beam traversing device and adjusting method thereof Download PDFInfo
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- CN1005084B CN1005084B CN87105005.6A CN87105005A CN1005084B CN 1005084 B CN1005084 B CN 1005084B CN 87105005 A CN87105005 A CN 87105005A CN 1005084 B CN1005084 B CN 1005084B
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- prism
- opticle
- light beam
- moving device
- lateral moving
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 230000010287 polarization Effects 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims abstract 2
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 14
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000008832 photodamage Effects 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 230000010405 clearance mechanism Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention uses an equivalent air parallel plate whose fixed inclination angle is obliquely placed in the optical path as regulating element, and utilizes the method of changing its thickness and rotating around optical axis to implement two-dimensional continuously-adjustable arbitrary positioning of emergent light beam in phi 50 mm symmetrical circle and retain polarization property of light beam. The position precision is less than or equal to 0.3 mm, the transmittance T of the medium-long wave band is more than or equal to 95 percent, and the light damage resistance threshold value is more than 300W/cm2The invention solves the problems of laser application engineering and on-line detection system in regulating micro displacement of laser beam and complicated optical path of large equipment, simplifies the regulation procedure greatly, raises efficiency and precision, and is also suitable for low-speed linear translation scanning of light beam.
Description
The invention belongs to laser new unit technical field.
In the modern optical experiment light path of complexity, often contain a plurality of large-scale separate units.The monochromator of for example large-scale gas or solid state laser, pump light source laser instrument-dye laser system, the experimental subjects device that has heating low temperature or vacuum system, terminal or other large-scale analysis and detecting instrument etc., owing to being not easy to or can not moving their optical axis neatly, make the tracking of whole light path very difficult.So far, general situation is the leg bolt that carries of using system excessively, or utilizes any utilizable implements (comprising books) pad temporarily on hand.Its consequence is to cause artificial instability.Obviously light path is difficult to be operated in optimum condition.In some laser application project and the online detection architecture of laser similar problem is arranged also.
For above-mentioned object, reasonable plan should be that the suitable optical axis that gathers large scale system is removed in the orientation that utilizes " optics joint " to change light beam.Generally speaking, the adjusting in light beam orientation can be decomposed into traversing and deflection two big classes.About traversing, existing similar functions device, a kind of reflection mirror pair of forming by two 45 ° of total reflection prisms that can one dimension slide relatively or plane mirror.Owing to the structural reason of itself, obviously be not suitable for above-mentioned purpose; Another kind is the parallel plate glass that is inclined in the light path.By regulating its inclination angle to optical axis, can change continuously transmitted light beam traversing amount (" the optics handbook, Shaanxi science and technology publishing house, 1986, p156-).But,, need thicker glass of high refractive index and bigger inclination angle in order to obtain the traversing amount of enough light beams.This causes bigger light absorption and reflection loss inevitably.Also impracticable as general-purpose device.As mentioned above, still there is not to be suitable for satisfactorily the optical device of above-mentioned requirements so far.
The purpose of this invention is in order to solve the difficulty of the complex optical path tracking that contains a plurality of large-scale autonomous devices, proposes the scheme that a kind of traversing neatly light beam goes to gather system's fixed optical axis.Provide a class and comprise ultraviolet, visible and infrared Opticle beam lateral moving device spare with and the method for regulating.Also can solve the similar difficulty in some laser application project and the online detection architecture of laser, thereby improve the efficiency and precision that experiment is regulated greatly.
The scheme that this invention proposes is to be inclined in air parallel flat in the light path as regulating element with the constant inclination angle, is the method for axle rotation with the incident ray by the thickness that changes it and the plane of incidence that makes it, the lateral attitude of realizing regulating continuously two-dimensionally light beam.For this reason, invented a class Opticle beam lateral moving device, and the control method of Opticle beam lateral moving device.The optics of this device partly is made up of the right-angle prism of a pair of reciprocal parallel placement, sees Fig. 1.When index prism 2 when deciding the deflecting light beams direction translation of prism 1, the thickness of air parallel flat continuously changes.With decide prism 1 identical index prism 2 angle that the light beam reverse reflex is same, so outgoing beam 4 produces radially traversing; The parallel flat that is made of prism 1,2 serves as an axle when rotating with incident beam 3, and outgoing beam 4 is traversing along hoop.Two kinds of adjustings combine, and can make outgoing beam 4 vertical and be to locate arbitrarily in the limited cross section circle of the heart with incident beam 3.
In Opticle beam lateral moving device of the present invention, the slide mechanism of index prism 2 is a kind of brand new technicals.It does not contain the dovetail groove that common high precision is slidingly matched and the elimination clearance mechanism of mechanical compaction.The gliding mass of this device is made up of single track a and single pearl rolling bearing b, sees Fig. 2.Be fixed on the NdFeB permanent magnet C on the gliding mass, on the normal direction on gliding mass plane, produce non-contacting magnetic attraction, replace ordinary elastic force, gliding mass and guide rail are formed eliminate being slidingly matched of gap guide rail d.So simple structure and lower cost have reached the level that is slidingly matched that the very high cost of common needs could obtain.This technology also can promote the use of other slidable adjustment occasion.
In the present invention, the air parallel flat is actually that a pair of inclined-plane by prism 1 and prism 2 forms.This is to being coated with the custom-designed broadband antireflecting film system that oblique incident ray is not had polarization effect on the inclined-plane.In addition, another of prism 1 and prism 2 is coated with the broadband antireflecting film system of normal incidence to the input and output surface of right angle face as device.Make this device very high transmitance not only be arranged, and do not change the polarization state of light beam at visible-range.
In the present invention, its method of regulating Opticle beam lateral moving device is: index prism 2 slides along the refracted ray direction of deciding prism 1 (rather than along incident ray direction), and this is the design optimization of this device.Like this, the size that can make index prism 2 is similarly little with the size of deciding prism 1, and may diminish to and just satisfy the clear aperature requirement.The result is not only and has reduced volume and weight, the more important thing is the light path that has shortened in the glass, has reduced phase distortion and light absorption that prism material causes.
The present invention has provided and has satisfied the general-purpose device that the traversing light beam of complex optical path that tracking contains main equipment requires on the class performance.In tracking was implemented, this device and beam deflector (this utility model " beam deflector " is applied for a patent simultaneously) coupling can make greatly abbreviation of tracking program.For example, earlier with all visual ground of large equipment rough alignment, be coarse adjustment.And the adjusting of leg bolt separately is mainly used in and guarantees self to work in stable optimum condition.In position insert Opticle beam lateral moving device thereafter, the prime output beam is traversing near the input port of next stage equipment.Inserting beam deflector near this input port at last, beam deflection to the optical axis by next stage equipment, is being seen Fig. 3.The rest may be inferred, so regulates.Usually the tracking program that spent 4-8 hour even still can not be satisfied with if used above-mentioned device, can be finished rapidly with interior at 10 minutes, makes light path stably be operated in optimum condition, and does not change the polarization properties of light beam.Yet existing bireflection (rib) lens device is not only regulated and can't be implemented for the traversing amount less than 10 millimeters of frequent needs, the more important thing is that they will change the polarization state of light beam as a rule.
Provide one of embodiments of the invention below, be called GY-A type Opticle beam lateral moving device, Fig. 1,2,3 is seen in its structure, principle and use; Technical specification and precision are as follows:
Service band 430-700 millimicron; 515 millimicrons of centre wavelengths
Transmitance (T) medium-long wave band T 〉=95%; Short-wave band T 〉=90%
The range of adjustment output beam is in the cross section that with the input beam is 50 millimeters of the φ at center
Adjustable continuously in the circle, to locate arbitrarily, the transmitance of each point is the same.
Degree of regulation position resolution≤0.3 millimeter
Clear aperature D
Imitate=10 millimeters
76 millimeters * L84 of overall dimensions φ millimeter
Anti-damage threshold continuous wave: 300 watts/centimetre
2, 515 millimicrons of λ
Pulse: 10
8Watt/centimetre
2, 10 nanoseconds, 533 millimicrons of λ
0.3 kilogram of weight
The Figure of description explanation
Fig. 1 Opticle beam lateral moving device light path principle figure
1 decides prism
2 index prisms
3 incident beams
4 outgoing beams
The slide mechanism schematic diagram of Fig. 2 Opticle beam lateral moving device
A single armed slide rail
The little single pearl rolling bearing of b
C magnet (NdFeB permanent magnet)
The d guide rail
The practicality figure of Fig. 3 Opticle beam lateral moving device
5 prime main equipment optical axises
6 level main equipment optical axises
7 Opticle beam lateral moving devices
8 beam deflectors
Claims (5)
1, a kind of Opticle beam lateral moving device that contains a pair of prism, it is characterized in that this prism is the right-angle prism of the reciprocal relatively parallel placement in inclined-plane, one is for deciding prism 1, another is an index prism 2,2 can slide along 1 refract light direction, the slide mechanism of index prism 2 is by single track a, and single pearl rolling bearing b and permanent magnet c and guide rail d constitute.
2, according to the described Opticle beam lateral moving device of claim 1, it is characterized in that constituting equivalent air parallel flat by the inclined-plane of pair of straight angle prism, and on the inclined-plane, be coated with the antireflecting film system that oblique incident ray is not had the broadband of polarization effect, on the prism right-angled surface, be coated with the broadband antireflecting film system of normal incidence.
3, according to the described Opticle beam lateral moving device of claim 1, the size, the material that it is characterized in that the pair of straight angle prism are identical, size is little of being complementary with clear aperature, and the gap is eliminated in the non-contacting magnetic force coupling that the slide mechanism of index prism 2 adopts permanent magnet NdFeB to produce.
4, a kind of method that is used to contain the traversing light beam of Opticle beam lateral moving device of a pair of prism, it is characterized in that utilizing the constant inclination angle to be inclined in equivalent air parallel flat in the light path as regulating element, by changing its thickness or rotating its plane of incidence and realize the horizontal displacement of outgoing beam.
5, according to the described traversing beam method of claim 4, it is characterized in that making index prism 2 along the refracted ray direction of deciding prism 1 with respect to prism 1 translation, and prism 1 and 2 serve as that axle rotates around it with incident beam 3 simultaneously, makes outgoing beam 4 adjustable continuously, any location of two dimension in diameter is 50 millimeters symmetrical circular section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105005.6A CN1005084B (en) | 1987-07-25 | 1987-07-25 | Light beam traversing device and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105005.6A CN1005084B (en) | 1987-07-25 | 1987-07-25 | Light beam traversing device and adjusting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031161A CN1031161A (en) | 1989-02-15 |
| CN1005084B true CN1005084B (en) | 1989-08-30 |
Family
ID=4815103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87105005.6A Expired CN1005084B (en) | 1987-07-25 | 1987-07-25 | Light beam traversing device and adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005084B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003216901A1 (en) * | 2002-04-26 | 2003-11-10 | International Business Machines Corporation | Polarizing beamsplitter |
| CN101408667B (en) * | 2008-11-21 | 2010-06-02 | 长春理工大学 | Optical hinge |
-
1987
- 1987-07-25 CN CN87105005.6A patent/CN1005084B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031161A (en) | 1989-02-15 |
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