CN102607520A - Device for detecting inclination angle and inclination direction of laser crystal - Google Patents
Device for detecting inclination angle and inclination direction of laser crystal Download PDFInfo
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- CN102607520A CN102607520A CN2012100802376A CN201210080237A CN102607520A CN 102607520 A CN102607520 A CN 102607520A CN 2012100802376 A CN2012100802376 A CN 2012100802376A CN 201210080237 A CN201210080237 A CN 201210080237A CN 102607520 A CN102607520 A CN 102607520A
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Abstract
The invention provides a device for detecting the inclination angle and the inclination direction of a laser crystal. The device comprises a laser device and a double-layer diaphragm, wherein the laser device can give out visible light, the double-layer diaphragm comprises a first layer of diaphragm and a second layer of diaphragm which are provided with a common hole, the second layer of diaphragm is fixed and is provided with the angle scales of 0-360 degrees around the center hole, the first layer of diaphragm can rotate around the common hole and is provided with a staff gauge extending to the periphery from the hole, and the visible light emitted by the laser device can penetrate through the hole of the double-layer diaphragm and enter the end surface of the laser device to be detected.
Description
Technical field
The present invention relates to the device of a kind of detection laser crystal tilting angle and vergence direction.
Background technology
For a complex laser system, the residual reflection of optical element surface is the necessary condition that self-sustained oscillation forms the vibration chamber, if having enough gains will form self-sustained oscillation in the vibration chamber.What plated usually at the medium two ends is high transmittance film, and transmissivity can not reach 100%, always has some remaining reflections, and laser repeatedly reflects to form self-sustained oscillation at the medium two ends.In high-gain multi-pass laser amplifier, self-sustained oscillation has consumed a large amount of counter-rotating particles, when laser once more when this laser medium, inverted population can occur in the laser medium and tail off and not enough situation occurs gaining.On the other hand, the intensity laser of self-sustained oscillation generation can cause crushing damage to optical element.In order to prevent the generation of self-sustained oscillation phenomenon; It (is the laser crystal angle of inclination that the end face of laser crystal has low-angle inclination angle with respect to its main shaft usually; For example rod tilts 2 °, 3 °), simultaneously, the vergence direction of laser crystal end face (being the vergence direction of laser crystal) also has clear and definite requirement.
Therefore, in the mass production of complex laser amplifier, need the device of a kind of detection laser crystal tilting angle and vergence direction, satisfy actual needs with angle of inclination and the vergence direction of guaranteeing laser crystal.
Summary of the invention
Therefore, the object of the present invention is to provide the device of a kind of detection laser crystal tilting angle and vergence direction.
The device of detection laser crystal tilting angle provided by the invention and vergence direction comprises:
Can send the laser instrument of visible light;
Double-deck diaphragm; Comprise ground floor diaphragm and second layer diaphragm, ground floor diaphragm and second layer diaphragm have common hole, and wherein second layer diaphragm is fixed; And center on the angle index that center pit has 0 °-360 °; The ground floor diaphragm can rotate around this common hole, and has the scale that extends towards periphery from this hole on it, and the visible light that said laser instrument sends passes the hole of double-deck diaphragm.
According to device provided by the invention, the angle index on wherein this scale indicating length, and sensing second layer diaphragm.
According to device provided by the invention, wherein said ground floor diaphragm is circle or bar shaped.
According to device provided by the invention, wherein said second layer diaphragm is circular.
The present invention also provides a kind of method of utilizing said apparatus detection laser crystal tilting angle and vergence direction, comprising:
1) makes the exit direction of the visible light in the hole of passing double-deck diaphragm be parallel to the main shaft of laser crystal to be detected, and this visible light is incided on the end face of testing laser crystal;
2) the ground floor diaphragm of the double-deck diaphragm of rotation makes its scale overlap with return the formed hot spot of ground floor diaphragm from said end face reflection, scale the angle index on the second layer diaphragm pointed be the vergence direction of laser crystal;
3) hole and the visible light of the double-deck diaphragm of measurement incide the distance L between the incidence point on the laser crystal; And measure the distance H between the hole of said hot spot and double-deck diaphragm, the angle of inclination that utilizes formula
to calculate laser crystal.
According to detection method provided by the invention; Step 2 wherein) also comprises; If the vergence direction and the required direction that record are not inconsistent, then rotate the ground floor diaphragm, make its scale point to the scale corresponding to required angle of second layer circular iris; Around the main axis rotation laser crystal of laser crystal, said hot spot is overlapped with scale again.
The device of detection laser crystal tilting angle provided by the invention and vergence direction, easy and simple to handle and very easily realization, accurately detection laser crystal tilting angle and vergence direction also can be adjusted to any required direction with the inclination angle of laser crystal accurately.
Description of drawings
Followingly the embodiment of the invention is described further with reference to accompanying drawing, wherein:
Fig. 1 is the structural representation of the pick-up unit that provides according to embodiments of the invention;
Fig. 2 is the local enlarged diagram of the double-deck diaphragm among Fig. 1;
Fig. 3 is the synoptic diagram of the method for the collimation laser that provides according to embodiments of the invention;
Fig. 4 is the synoptic diagram of the detection method that provides according to embodiments of the invention;
Fig. 5 is the principle schematic of the detection method that provides according to embodiments of the invention.
Embodiment
It is bar-shaped that laser crystal is generally; In this manual; " main shaft " refers to the vertical central axis of laser crystal, normal direction of " angle of inclination " finger tip face and the angle between the major axes orientation, and the normal of " vergence direction " finger tip face projects to perpendicular to the direction on the plane of main shaft.
The device of a kind of detection laser crystal tilting angle and vergence direction is provided according to one embodiment of present invention, and its structure is as shown in Figure 1, comprises
Laser instrument 1 can send visible light;
Double-deck diaphragm 2; The structural representation of its amplification is as shown in Figure 2, has concentric ground floor circular iris 21 and second layer circular iris 22, and ground floor circular iris 21 has common center pit 20 with second layer circular iris 22; Wherein second layer circular iris 22 is fixing; And the angle index that has 0 °-360 ° on its circumference, ground floor circular iris 21 can rotate around common center pit 20, and has the scale that extends to circumference from center pit 20 on it; But this scale indicating length, and point to the angle index on second layer circular iris 22 circumference;
The adjustable positions of laser instrument 1 and double-deck diaphragm 2 wherein, the visible light that laser instrument 1 sends passes the center pit 20 of double-deck diaphragm 2, and incides on the end face of laser crystal to be detected 3.
The explanation detection laser crystal tilting angle that provides of present embodiment and the Device Testing method of vergence direction below; For example; Need whether the pitch angle of detection laser crystal is 3 °; Whether vergence direction satisfies the requirement of inclination vertically upward, and the device that present embodiment provides detects according to following detection method:
1) make the exit direction of the visible light of the center pit that passes double-deck diaphragm be parallel to the main shaft of laser crystal to be detected; Concrete steps comprise: as shown in Figure 3; On the light path of visible light, place diaphragm 4 and diaphragm 5; Make diaphragm 4 consistent with the height of center of the device of clamping testing laser crystal 3, thereby the straight line that diaphragm 4 and diaphragm 5 are confirmed overlap with the main shaft of laser crystal with the aperture on the diaphragm 5; The position of adjustment laser instrument 1 and double-deck diaphragm 2 makes the aperture that passes through diaphragm 4 and diaphragm 5 from the visible light of double-deck diaphragm outgoing successively; Remove diaphragm 4 and diaphragm 5, on the device of clamping testing laser crystal 3, put laser crystal 3, thereby make the exit direction of the visible light of the center pit that passes double-deck diaphragm be parallel to the main shaft of laser crystal to be detected;
2) as shown in Figure 4, visible light passes the center pit of double-deck diaphragm and by behind the end face reflection of laser crystal, incides on the ground floor circular iris 21 and forms hot spot; Because the end face of laser crystal exists to tilt, so this hot spot off-center hole, rotate the ground floor circular iris 21 of double-deck diaphragm earlier; Its scale is overlapped with this hot spot, and read the angle index on the scale second layer circular iris 22 pointed this moment, if be 90 °; The vergence direction that this laser crystal then is described meets the requirements; If this hot spot does not overlap with said scale, explain that then the vergence direction of this laser crystal is undesirable, then need rotate ground floor circular iris 21; Make its scale point to 90 ° of angle indexs on the second layer circular iris 22; Around the main axis rotation laser crystal of laser crystal 3, this hot spot is overlapped with scale again, thereby make the vergence direction of this laser crystal meet requirement vertically upward;
3) center pit and the visible light of the double-deck diaphragm of measurement incide the distance L between the incidence point on the laser crystal; And measure the distance H between the center pit of above-mentioned hot spot and double-deck diaphragm, the angle of inclination that utilizes formula
to calculate laser crystal;
4) judge whether the angle of inclination that records is 3 °.
In order to illustrate in greater detail the derivation of this formula, Fig. 5 shows the local enlarged diagram of laser crystal end region.Geometry from Fig. 5 can be released, H=L tg2 θ, therefore
In the present embodiment; Record L=50mm; H=5.25mm; With this numerical value that records bring into formula
calculate 3 ° of θ ≈, thereby learn that this laser crystal to be detected meets the requirements.
According to one embodiment of present invention, wherein the ground floor diaphragm also can be for other shapes, such as bar shaped; This bar shaped diaphragm can rotate around center pit, and has scale on it, and said center pit can pass the center of bar shaped; Also can only pass a side of bar shaped, needle-like when being.
According to one embodiment of present invention, wherein the ground floor diaphragm also can be other shapes, and is for example square, as long as its inside has the circumference that has angle index.
According to one embodiment of present invention, wherein in detection, except above-mentioned steps 1) described in method, also can adopt additive method to make the exit direction of the visible light of the center pit that passes double-deck diaphragm be parallel to the main shaft of laser crystal to be detected.
Utilize device provided by the invention, accurately the angle of inclination of detection laser crystal and vergence direction also can be adjusted to any required direction with the inclination angle of laser crystal accurately.
Device of the present invention also can be used for detecting the angle of inclination and the vergence direction of the crystal that has the inclination angle in the other field.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is specified with reference to embodiment; Those of ordinary skill in the art is to be understood that; Technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. the device of detection laser crystal tilting angle and vergence direction comprises:
Can send the laser instrument of visible light;
Double-deck diaphragm; Comprise ground floor diaphragm and second layer diaphragm, ground floor diaphragm and second layer diaphragm have common hole, and wherein second layer diaphragm is fixed; And center on the angle index that center pit has 0 °-360 °; The ground floor diaphragm can rotate around this common hole, and has the scale that extends towards periphery from this hole on it, and the visible light that said laser instrument sends passes the hole of double-deck diaphragm.
2. device according to claim 1, the angle index on wherein this scale indicating length, and sensing second layer diaphragm.
3. device according to claim 1, wherein said ground floor diaphragm is circle or bar shaped.
4. device according to claim 1, wherein said second layer diaphragm are circular.
5. device according to claim 1, the adjustable positions of wherein said laser instrument.
6. device according to claim 1, wherein said double-deck location of aperture is adjustable.
7. method of utilizing device detection laser crystal tilting angle according to claim 1 and vergence direction comprises:
1) makes the exit direction of the visible light in the hole of passing double-deck diaphragm be parallel to the main shaft of laser crystal to be detected, and this visible light is incided on the end face of testing laser crystal;
2) the ground floor diaphragm of the double-deck diaphragm of rotation makes its scale overlap with return the formed hot spot of ground floor diaphragm from said end face reflection, scale the angle index on the second layer diaphragm pointed be the vergence direction of laser crystal;
3) hole and the visible light of the double-deck diaphragm of measurement incide the distance L between the incidence point on the laser crystal; And measure the distance H between the hole of said hot spot and double-deck diaphragm, the angle of inclination that utilizes formula
to calculate laser crystal.
8. method according to claim 7; Step 2 wherein) also comprises; If the vergence direction and the required direction that record are not inconsistent, then rotate the ground floor diaphragm, make its scale point to the scale corresponding to required angle of second layer circular iris; Around the main axis rotation laser crystal of laser crystal, said hot spot is overlapped with scale again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210080237.6A CN102607520B (en) | 2012-03-23 | 2012-03-23 | Device for detecting inclination angle and inclination direction of laser crystal |
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| CN201210080237.6A CN102607520B (en) | 2012-03-23 | 2012-03-23 | Device for detecting inclination angle and inclination direction of laser crystal |
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Cited By (7)
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| CN107402061A (en) * | 2017-06-29 | 2017-11-28 | 西安知微传感技术有限公司 | Resonant mode scanning mirror amplitude measurement system and method |
| CN108555438A (en) * | 2018-07-06 | 2018-09-21 | 温州大学激光与光电智能制造研究院 | Laser machine fundamental frequency frequency multiplication switching system and its method |
| CN108871736A (en) * | 2018-07-11 | 2018-11-23 | 苏州天步光电技术有限公司 | A kind of 45 degree of angle detection devices of optical device plane |
| CN108955880A (en) * | 2018-06-08 | 2018-12-07 | 中国科学院合肥物质科学研究院 | High-precision UV double grating spectrograph concentricity scaling method |
| CN110936506A (en) * | 2019-12-09 | 2020-03-31 | 济南晶众光电科技有限公司 | DKDP crystal automatic rod rotating machine and processing technology |
| CN115031692A (en) * | 2022-08-10 | 2022-09-09 | 深圳珑璟光电科技有限公司 | Method for measuring vertical deviation angle and electronic equipment |
| CN115540838A (en) * | 2022-12-01 | 2022-12-30 | 中煤科工西安研究院(集团)有限公司 | Precision testing method for rod feeding recognition system of coal mine underground drill rod loading and unloading robot |
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| CN110936506A (en) * | 2019-12-09 | 2020-03-31 | 济南晶众光电科技有限公司 | DKDP crystal automatic rod rotating machine and processing technology |
| CN115031692A (en) * | 2022-08-10 | 2022-09-09 | 深圳珑璟光电科技有限公司 | Method for measuring vertical deviation angle and electronic equipment |
| CN115031692B (en) * | 2022-08-10 | 2022-11-25 | 深圳珑璟光电科技有限公司 | Method for measuring vertical deviation angle and electronic equipment |
| CN115540838A (en) * | 2022-12-01 | 2022-12-30 | 中煤科工西安研究院(集团)有限公司 | Precision testing method for rod feeding recognition system of coal mine underground drill rod loading and unloading robot |
| CN115540838B (en) * | 2022-12-01 | 2023-03-10 | 中煤科工西安研究院(集团)有限公司 | Precision testing method for rod feeding recognition system of coal mine underground drill rod loading and unloading robot |
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| CN102607520B (en) | 2014-03-26 |
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