CN1396434A - Internally focusing telescope for regulating raster resonator of infrared laser device - Google Patents
Internally focusing telescope for regulating raster resonator of infrared laser device Download PDFInfo
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- CN1396434A CN1396434A CN 01122947 CN01122947A CN1396434A CN 1396434 A CN1396434 A CN 1396434A CN 01122947 CN01122947 CN 01122947 CN 01122947 A CN01122947 A CN 01122947A CN 1396434 A CN1396434 A CN 1396434A
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- object lens
- graticule
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- focusing
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Abstract
An internally focusing telescope for regulating the raster resonator for infrared laser device uses a small laser device in visual band to emit light beam for precisely regulating the raster resonator. The cross is emitted from the said telescope to the infrared raster to be regulated. The crosses with different orders after refracted by raster are returned. The gap between the emitted and the returned crosses is measured. Regulating the raster can make them coincide. Its advantages are simple structure and high measuring precision.
Description
Technical field:
The present invention proposes a kind of internal focusing telescope that can be used for adjusting the raster resonator of tunable infrared laser, can realize the accurate adjustment in echelette chamber.
Background technology:
Along with the continuous progress of science and technology, the application of infrared laser is expanded greatly, still all is with a wide range of applications in the military affairs aspect civilian.The adjustment technology of laser resonant cavity also constantly advances, the most widely used internal focusing telescope that surely belongs in the instrument of employed adjustment resonator cavity.Internal focusing telescope is the precision optics detecting instrument that a kind of focal length is variable, carry transmitting illuminant.It serves many purposes, and is easy to use, can be used as autocollimation light pipe and adjustable focus telescope and uses.Therefore it is widely used in optical laboratory and optics job shop as check and adjustment instrument.For example: be used for checking " linearity " of guide rail, " verticality " between the basal plane, " depth of parallelism " between the plane, " alignment " between the aperture or the like.Can be observed the graticule that has scale on the focal plane of internal focusing telescope, measurable minimum precision reaches 10 rads (48.5 microradians).Common optical resonator adjustment is to utilize internal focusing telescope emission one " ten " word line, is radiated on the mirror surface, regulates the focal length of internal focusing telescope, makes cross curve blur-free imaging that reflection returns on the focal plane.The net result of adjusting resonator cavity is that the cross curve of emission and the cross curve that returns are coincided.For common laserresonator, it is average chamber or flat-concave cavity, only needs to adjust the optics cavity sheet at two ends, chamber, makes it parallel to each other, and the cross curve that promptly is transmitted into two chamber sheets overlaps with the cross curve that returns, and fixes two resonator cavity sheets then, transfers the chamber to finish.And transfer the chamber that shakes for grating, and situation is different, and the transmitting illuminant of internal focusing telescope is common incandescent light source, has only when light path is vertical with grating surface, can return cross curve, and when grating turned to other angle, no cross curve returned.The situation vertical with grating is to belong to the pattern zero order diffraction, so white light is still returned white light to grating, and when grating rotated, promptly grating face and light path were in non-perpendicular state, formed multistage diffraction.On the focal plane of internal focusing telescope, only can be observed some colored horizontal lines, and its light intensity is faint, is difficult for observation, be unfavorable for the accurate adjustment of raster resonator.Adopting the laser instrument of raster resonator is in order to realize the tunable output of laser line.By grating equation as can be known, when incident angle changed, angle of diffraction also changed, and corresponding laser line output wavelength changes.Along with the variation of grating corner, the laser of each wavelength that can tuning successively this laser medium of output.The raster resonator shortcoming of using common internal focusing telescope to adjust infrared laser is accurately to adjust in whole grating corner workspace, the adjustment error in grating chamber is bigger, its result causes the resonator cavity off resonance serious, the output number of laser line seldom, can not give full play to the advantage of tunable laser, greatly limit the practical application of tunable laser.The present invention is directed to the practical problems of present existence, original common internal focusing telescope structure implemented to improve, with visible wavelength lasers as the internal focusing telescope transmitting illuminant, thereby realized the accurate adjustment of echelette resonator cavity.
Summary of the invention:
Elaborate the principle of the invention and structure in conjunction with the accompanying drawings, with the microminiature laser instrument of the visible light wave range transmitting illuminant as internal focusing telescope, optical system as shown in the figure.By laser beam process condenser 2 and catoptron 3 uniform illumination spherical reflectors 4 that light source 1 sends, plating is also delineated with the aluminium total reflection film on the spherical reflector " ten " word cross wires shape rete.When focusing object lens 5 are transferred to the position, infinite distance, cross curve is positioned at objective system 5 just, on 6 the focal plane, thereby, after the light beam that is penetrated by cross curve this moment passes through objective system, with the parallel ejaculation of the laser beam of single wavelength, laser beam is reflected and by objective system cross curve is resembled on the face of aluminizing of spherical reflector again after face 7 (determinand) reflects, resemble object lens 9 can be observed the cross curve and the reflected image thereof of focal plane on the graticule 10 of eyepiece 11 coincidence degree by plane mirror 8 and commentaries on classics, deviation value can be read on the visual field of micrometer eyepiece and microdrum, focusing lens 5 can move forward and backward, and the target imaging that makes different distance is on the focal plane of objective system.The present invention is mainly by lasing light emitter (1), condenser (2), reflecting prism (3), spherical reflector (4), focusing object lens (5), fixing object lens (6), plane mirror (8), change and resemble object lens (9), graticule (10), eyepiece (11) is formed, wherein lasing light emitter (1) is in the top of condenser (2), condenser (2) is combined by concavees lens and convex lens, parallel beam is radiated at reflecting prism (3), level is radiated on the focusing object lens (5) after spherical reflector (4) reflection, outgoing object lens (6) become horizontal optical path with focusing object lens (5), the two is all compound lens, fixedly object lens (6) are positioned at the place ahead of focusing object lens (5), object under test (7) is in fixing the place ahead of object lens (6), the light that reflects shines to change after spherical reflector (4) and plane mirror (8) reflection and resembles object lens (9), imaging is in graticule (10), observe by eyepiece (11), condenser (2) is in the top of reflecting prism (3), focusing object lens (5) are horizontal positioned with reflecting prism (3), plane mirror (8) is in the oblique below of reflecting prism (3), change and resemble the back of object lens (9) in plane mirror (8), graticule (10) resembles the rear of object lens (9) in commentaries on classics, eyepiece (11) is in the back of graticule (10), plane mirror (8), change and resemble object lens (9), graticule (10) and eyepiece (11) are horizontal positioned.
Determinand generally is a reflection-type diffraction grating among the present invention, and normally used grating is 100-150 line/mm, and its one-level blaze wavelength is generally several microns to tens microns.Internal focusing telescope institute emitted laser cross curve is radiated on the diffraction grating, but diffraction goes out the dozens of cross curve, and the order of diffraction that the variation correspondence of angle of diffraction is different is inferior.Because use laser instrument as transmitting illuminant, wavelength is single, beam intensity is far longer than the diffracted intensity of incandescent lamp behind diffraction.Rotating grating can be successively turn back to the focal plane of internal focusing telescope at different levels times cross curve.According to the spacing of the cross curve of launching on the graticule of focal plane with the cross curve that returns, the turning axle of the left and right sides side angle of adjustable lay the grain grid, the front and back angle of pitch, grating and the turntable of rotating grating.Observe with internal focusing telescope, adjust each factor that influences grating, transferring the desired result in chamber is that all cross curve that return all overlap with the cross curve of emission, and the adjustment work of raster resonator promptly comes to an end.
The present invention can realize fast, adjust accurately raster resonator, and this device has characteristics such as simple in structure, cheap, easy to use, can be widely used in the activities such as education experiment and research practice.The present invention reaches 10 rads to the adjustment precision of raster resonator, and error is less, can greatly improve and transfer the chamber precision, finally realizes the increasing substantially of tuning number of laser instrument output spectral line.
Fig. 1 is a principle assumption diagram of the present invention.
Embodiment:
To a small-sized transverse excitation atmosphere CO
2The raster resonator of pulsed laser adjusts experiment.One in the infrared stainless steel of reflection-type diffraction grating at former quarter, grating constant is 150 lines/mm, one-level blaze wavelength 10.6 μ m.The transmitting illuminant of internal focusing telescope is the laser diode (semiconductor laser) that a wavelength is 650nm, peak power output 5mW.For preventing asthenopia, can wear safety goggles protection eyes according to the intensity size of return laser light.The objective focal length of internal focusing telescope transfers to the infinite distance, the light path of internal focusing telescope and laser resonant cavity light path parallel, and light path is vertical with grating surface, the cross curve vertical irradiation grating face of emission.Adjust grating, the cross curve that returns after its rotation is all become on the focal plane of internal focusing telescope.According to emission cross curve and the spacing of returning cross curve, fine setting grating seat and grating turntable all overlap its cross curve that returns with the cross curve of emission.The net result of test, the Tunable TEA CO of one-level output
251 of laser tuning output laser lines.
Claims (1)
1. internal focusing telescope of adjusting raster resonator of infrared laser device is characterized in that:
Mainly by lasing light emitter (1), condenser (2), reflecting prism (3), spherical reflector (4), focusing object lens (5), fixing object lens (6), plane mirror (8), change and resemble object lens (9), graticule (10), eyepiece (11) is formed, wherein lasing light emitter (1) is in the top of condenser (2), condenser (2) is combined by concavees lens and convex lens, parallel beam is radiated at reflecting prism (3), level is radiated on the focusing object lens (5) after spherical reflector (4) reflection, outgoing object lens (6) become horizontal optical path with focusing object lens (5), the two is all compound lens, fixedly object lens (6) are positioned at the place ahead of focusing object lens (5), object under test (7) is in fixing the place ahead of object lens (6), the light that reflects shines to change after spherical reflector (4) and plane mirror (8) reflection and resembles object lens (9), imaging is in graticule (10), observe by eyepiece (11), condenser (2) is in the top of reflecting prism (3), focusing object lens (5) are horizontal positioned with reflecting prism (3), plane mirror (8) is in the oblique below of reflecting prism (3), change and resemble the back of object lens (9) in plane mirror (8), graticule (10) resembles the rear of object lens (9) in commentaries on classics, eyepiece (11) is in the back of graticule (10), plane mirror (8), change and resemble object lens (9), graticule (10) and eyepiece (11) are horizontal positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011229470A CN1151397C (en) | 2001-07-17 | 2001-07-17 | Internally focusing telescope for regulating raster resonator of infrared laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011229470A CN1151397C (en) | 2001-07-17 | 2001-07-17 | Internally focusing telescope for regulating raster resonator of infrared laser device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1396434A true CN1396434A (en) | 2003-02-12 |
| CN1151397C CN1151397C (en) | 2004-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011229470A Expired - Fee Related CN1151397C (en) | 2001-07-17 | 2001-07-17 | Internally focusing telescope for regulating raster resonator of infrared laser device |
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| Country | Link |
|---|---|
| CN (1) | CN1151397C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945857B (en) * | 2005-10-09 | 2012-06-27 | 采钰科技股份有限公司 | Wafer grade image module |
| CN103776395A (en) * | 2012-10-23 | 2014-05-07 | 沈阳航天新乐有限责任公司 | Infrared test optical source calibration system |
| CN113640774A (en) * | 2021-08-12 | 2021-11-12 | 吉林省巨程智造光电技术有限公司 | Non-debugging optical system based on common aperture of aiming and receiving and use method |
-
2001
- 2001-07-17 CN CNB011229470A patent/CN1151397C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945857B (en) * | 2005-10-09 | 2012-06-27 | 采钰科技股份有限公司 | Wafer grade image module |
| CN103776395A (en) * | 2012-10-23 | 2014-05-07 | 沈阳航天新乐有限责任公司 | Infrared test optical source calibration system |
| CN113640774A (en) * | 2021-08-12 | 2021-11-12 | 吉林省巨程智造光电技术有限公司 | Non-debugging optical system based on common aperture of aiming and receiving and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151397C (en) | 2004-05-26 |
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