CN220718117U - Optical element fixing device based on femtosecond laser welding - Google Patents
Optical element fixing device based on femtosecond laser welding Download PDFInfo
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- CN220718117U CN220718117U CN202321807270.4U CN202321807270U CN220718117U CN 220718117 U CN220718117 U CN 220718117U CN 202321807270 U CN202321807270 U CN 202321807270U CN 220718117 U CN220718117 U CN 220718117U
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- bracket
- optical element
- femtosecond laser
- laser welding
- cylinder
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- 230000003287 optical effect Effects 0.000 title claims abstract description 94
- 238000003466 welding Methods 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 3
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 abstract description 10
- 238000004026 adhesive bonding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Abstract
The utility model discloses an optical element fixing device based on femtosecond laser welding, which comprises a bottom plate, a first bracket and a second bracket; the first bracket comprises an angle adjusting mechanism and an embedded part fixed above the angle adjusting mechanism, the bottom plate is provided with an accommodating mechanism matched with the bottom of the angle adjusting mechanism, and before the first bracket and the bottom plate are welded by femtosecond laser, the first bracket is universally adjustable through the angle adjusting mechanism; the second bracket comprises an adjustable mechanism arranged at the lower end of the second bracket, the adjustable mechanism is connected with the first bracket in a jogged way through a jogged part, and the upper end of the second bracket is welded with the optical element through femtosecond laser; and before the second bracket and the first bracket are welded by the femtosecond laser, the second bracket adjusts the height and the rotation direction through the adjustable mechanism. The utility model can solve the technical problems that the traditional glue-bonded optical element fixing mode has low strength, is easy to age, has small adjusting range and pulls the optical element by glue stress.
Description
Technical Field
The utility model belongs to the technical field of optics, and particularly relates to an optical element fixing device based on femtosecond laser welding.
Background
Optical element fixtures are widely used in space optics. The existing fixing method of the optical element and the optical element fixing device mainly comprises adhesive bonding, anodic bonding, fusion welding and the like. The adhesive bonding is the most mainstream method, and the optical element is bonded on the fixing bracket by using glue, so that the fixing method is simple, but the glue is easy to fall off after long-time aging. For the optical element needing precise optical coupling, the size and the position of the fixing support are required to be designed in advance because the adjusting range of the glue for bonding the optical element is limited; and the stress produced when the glue is solidified can pull the optical element to deviate from the coupling position, so that the precision of the optical equipment is affected. Because the size and position of the fixing bracket need to be designed in advance, the size and position adjustment needs to be performed before the fixing bracket is installed. However, the conventional optical element fixing device is inconvenient in angle and length adjustment before connection, so that the position and angle of the optical element are affected.
The femtosecond laser welding is to focus the ultra-short pulse laser with high peak power on the material interface to excite the nonlinear absorption of the material, so that the material in the focus area is heated and melted for welding, and the method has the characteristics of high precision, high speed, low thermal damage and high welding strength. How to apply the femtosecond laser welding to the fixation of the optical element and the optical element fixing device is a new subject of research.
Disclosure of Invention
The utility model mainly aims to provide an optical element fixing device based on femtosecond laser welding, which can enable an optical element to be positioned at an optimal position and solve the technical problems that the optical element fixing mode of traditional glue bonding is low in strength, easy to age and the optical element is pulled by glue stress.
The technical scheme adopted by the utility model is as follows:
an optical element fixing device based on femtosecond laser welding comprises a bottom plate, a first bracket and a second bracket;
the first bracket comprises an angle adjusting mechanism and an embedded part fixed above the angle adjusting mechanism, a containing mechanism matched with the bottom of the angle adjusting mechanism is arranged on the bottom plate, and before the first bracket and the bottom plate are welded by femtosecond laser, the first bracket is universally adjustable through the angle adjusting mechanism, so that the angle of the optical element is adjustable;
the second bracket comprises an adjustable mechanism arranged at the lower end of the second bracket, the adjustable mechanism is connected with the first bracket in a jogged way through the jogged part, and the upper end of the second bracket is welded with the optical element through femtosecond laser; before the second support and the first support are welded by the femtosecond laser, the second support adjusts the height and the rotation direction through the adjustable mechanism, so that the height and the rotation direction of the optical element are adjustable.
According to the scheme, the optical element fixing device based on the femtosecond laser welding further comprises a first clamp and a second clamp; the first clamp and the second clamp are externally connected with an adjusting tool; the first clamp clamps the first bracket to realize the adjustment of the first bracket in a certain angle range; the second clamp clamps the second bracket to realize the adjustment of the height and the rotation direction of the second bracket; during adjustment, the first bracket and the second bracket are respectively connected with the first clamp and the second clamp in a glue bonding mode. And after the welding is finished, the first clamp and the second clamp are respectively taken down from the first bracket and the second bracket through the dispergator.
According to the scheme, the angle adjusting mechanism is of a spherical structure, the embedded part is of a cylinder, and the upper end of the spherical structure is connected with the lower end of the cylinder; the accommodating mechanism is a hemispherical groove arranged on the upper surface of the bottom plate; the lower end of the spherical structure is embedded into the hemispherical groove;
before the first support and the bottom plate are welded by the femtosecond laser, the spherical structure can rotate in the hemispherical groove, so that universal adjustment on the first support and the bottom plate is realized, and angle adjustment of the optical element is realized.
According to the scheme, the upper end of the second bracket is a flat plate, the upper surface of the flat plate is a plane, and the upper surface is welded with the optical element; the adjustable mechanism is connected with the lower surface of the flat plate and is provided with a crescent groove which is matched with the cylinder of the first bracket;
before the second support and the first support are welded by the femtosecond laser, the cylinder of the first support is connected with the adjustable mechanism of the second support in a jogged mode, the second support can rotate around the cylinder and move up and down on the cylinder, and then the height and the rotation direction of the optical element are adjusted.
According to the scheme, the plane of the bottom of the optical element and the top plane of the second bracket (the upper surface of the flat plate) are smooth, so that the optical contact between the plane of the bottom of the optical element and the top plane of the second bracket is ensured, namely, the contact gap between the upper surface of the flat plate and the lower surface of the optical element is smaller than lambda/4. The femtosecond laser welds the contact planes.
The hemispherical groove of the bottom plate, the spherical structure of the first bracket, the cylinder of the first bracket and the crescent groove of the second bracket have high processing precision and smooth surfaces, so that the hemispherical groove of the bottom plate and the spherical structure of the first bracket, the cylinder of the first bracket and the crescent groove of the second bracket respectively form optical contact, namely the contact gap between the spherical structure and the hemispherical groove is smaller than lambda/4, and the contact gap between the crescent groove and the cylinder of the first bracket is smaller than lambda/4. After the position of the optical element is adjusted, the fitted contact surface is welded by the femtosecond laser.
According to the scheme, the bottom plate, the first support, the second support and the optical element are all devices made of materials with similar thermal expansion coefficients such as glass or sapphire, so that the influence of thermal stress after cooling in the femtosecond laser welding is minimum.
The spherical structure of the first bracket is matched with the hemispherical groove on the bottom plate, the first bracket is embedded in the hemispherical groove of the bottom plate through the spherical structure, and the embedded part is universally adjustable. The lower extreme of second support is equipped with crescent recess, and the top is the plane, and crescent recess and the cylinder looks adaptation of first support of second support lower extreme, and the second support passes through crescent recess and the cylinder gomphosis of first support, and gomphosis length and the spiral direction are adjustable. The first clamp and the second clamp can realize the adjustment of the spherical structure of the first bracket and the hemispherical groove embedded part of the bottom plate in a certain angle range through the external adjusting tool, and the adjustment of the embedding length and the rotation direction of the cylindrical column of the first bracket and the crescent groove of the second bracket, so that the angle of the first bracket can be adjusted, the height and the rotation direction of the second bracket can be adjusted, and the optical element can be positioned at the optimal position.
The utility model has the beneficial effects that:
before the first bracket and the bottom plate are welded by femtosecond laser, the angle of the optical element is adjusted;
before the first bracket and the second bracket are welded by the femtosecond laser, the height and the rotation direction of the optical element are adjusted;
the first bracket can realize angle adjustment, the second bracket can realize rotation direction and height adjustment, and the combination of the first bracket and the second bracket can enable the optical element to reach any posture in an adjustment range, so that the adjustment range is wide, and the precision of the optical element is improved;
the femto-second laser is adopted to weld the optical element and the optical element fixing device, so that the welding strength is high, and the fixed optical element has excellent environmental resistance and is not easy to age and fall off; the technical problems of low strength, easy aging and small adjusting range of the traditional glue-bonded optical element fixing mode are solved;
the problem that the optical element is pulled by glue stress in the traditional mode of bonding the optical element by glue can be effectively avoided by using femtosecond laser welding, and the optical element is easy to fix under the high-precision coupling requirement;
it is very convenient to adjust the angle of the first support, as well as the rotation direction and length of the second support, thereby ensuring that the optical element is in an optimal position.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of an optical element fixture based on femtosecond laser welding;
1. a bottom plate; 2. a first bracket; 3. a second bracket; 4. a second clamp; 5. an optical element; 6. a first clamp; 7. hemispherical grooves; 8. a spherical structure; 9. a cylinder; 10. an adjustable mechanism; 11. and (3) a flat plate.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, an optical element fixing device based on femtosecond laser welding includes a base plate 1, a first bracket 2, a second bracket 3, a first jig 6, and a second jig 4; the base plate 1, the first support 2, the second support 3 and the optical element 5 are all devices made of materials with similar thermal expansion coefficients such as glass or sapphire, so that the thermal stress influence is minimum after the femtosecond laser welding is cooled.
The first bracket 2 includes an angle adjusting mechanism (spherical structure 8), a fitting portion (cylinder 9). The angle adjusting mechanism (spherical structure 8) of the first bracket 2 is matched with the accommodating mechanism (hemispherical groove 7) of the bottom plate 1, and the lower end of the spherical structure 8 is connected with the hemispherical groove 7 on the bottom plate 1 in a jogged manner; the upper end of the spherical structure 8 is connected with the lower end of the cylinder 9. Before the first bracket 2 and the bottom plate 1 are welded by the femtosecond laser, the spherical structure 8 can rotate in the hemispherical groove 7 (namely, the embedded part is universally adjustable), so that the first bracket 2 is universally adjustable, and the angle of the optical element 5 is adjustable.
The second bracket 3 includes an adjustable mechanism 10 provided at a lower end thereof, the adjustable mechanism 10 is connected with the first bracket 2 by a fitting portion (cylinder 9) in a fitting manner, an upper end of the second bracket is a flat plate 11, an upper surface of the flat plate 11 is a plane, and the upper surface is connected with the optical element 5 by femtosecond laser welding. The adjustable mechanism 10 is connected with the lower surface of the flat plate 11, and the adjustable mechanism 10 is provided with a crescent groove which is matched with the embedded part (the cylinder 9) of the first bracket;
before the second bracket 3 and the first bracket 2 are welded by the femtosecond laser, the embedded part (the cylinder 9) of the first bracket 2 is embedded and connected with the crescent groove of the adjustable mechanism 10 of the second bracket 3, the second bracket 3 can rotate around the cylinder 9 and move up and down on the cylinder 9, and then the height and the rotation direction of the optical element 5 are adjusted.
In this embodiment, the plane of the bottom of the optical element 5 and the top plane of the second support 3 (the upper surface of the flat plate 11) are smooth, so that the optical contact between the plane of the bottom of the optical element 5 and the top plane of the second support 3 is ensured, i.e. the contact gap between the upper surface of the flat plate 11 and the lower surface of the optical element 5 is less than λ/4. The femtosecond laser welds the contact planes. The hemispherical groove 7 of the bottom plate 1, the spherical structure 8 of the first bracket 2, the cylinder 9 of the first bracket 2 and the crescent groove of the second bracket 3 have higher processing precision and smooth surfaces, so that the hemispherical groove 7 of the bottom plate 1 and the spherical structure 8 of the first bracket 2, the cylinder 9 of the first bracket 2 and the crescent groove of the second bracket 3 respectively form optical contact, namely the contact gap between the spherical structure 8 and the hemispherical groove 7 is smaller than lambda/4, and the contact gap between the crescent groove and the cylinder 9 of the first bracket 2 is smaller than lambda/4. After the position of the optical element 5 is adjusted, the fitted contact surface is welded by the femtosecond laser.
The first clamp 6 and the second clamp 4 can be externally connected with an adjusting tool; the first clamp 6 clamps the first bracket 2 to realize the adjustment of the first bracket 2 in a certain angle range; the second clamp 4 clamps the second bracket 3 to realize the height and the rotation direction adjustment of the second bracket 3; during adjustment, the first bracket 2 and the second bracket 3 are respectively connected with the first clamp 6 and the second clamp 4 in a glue bonding mode. After the welding is completed, the first clamp 6 and the second clamp 4 are respectively removed from the first bracket 2 and the second bracket 3 through the glue removing agent.
The method for fixing the optical element by adopting the optical element fixing device based on the femtosecond laser welding comprises the following steps:
1) Placing the optical element 5 on the upper surface of the flat plate 11 of the second bracket 3, wherein the bottom plane of the optical element 5 and the top plane of the second bracket (the upper surface of the flat plate 11) are processed with high precision, and the optical element 5 and the top plane of the second bracket are in optical contact, namely the contact clearance between the optical element and the flat plate is smaller than lambda/4, and van der Waals gas force is formed between the contact surfaces to temporarily bond the optical element 5 and the second bracket 3; the optical element 5 and the second mount 3 are welded using a femtosecond laser focused on the contact surface.
2) After the optical element 5 and the second bracket 3 are welded, the first clamp 6 and the second clamp 4 are respectively adhered to the first bracket 2 and the second bracket 3 by using glue, and the first clamp 6 and the second clamp 4 can be externally connected with an adjusting frame. The spherical structure 8 at the bottom of the first bracket is controlled to be embedded with the hemispherical groove 7 of the bottom plate by the first clamp 6, and the spherical structure 8 of the first bracket is matched with the radius of the hemispherical groove 7 of the bottom plate, so that the spherical structure 8 of the first bracket can be embedded randomly within a certain angle range, and the adjustment of the first bracket 2 within a certain angle range can be realized. The crescent groove of the adjustable mechanism 10 of the second bracket is controlled to be embedded with the cylinder 9 of the first bracket 2 by the second clamp 4, and the rotation direction and the embedded length of the embedded can be controlled due to the fact that the crescent groove of the second bracket 3 is matched with the radius of the cylinder 9 of the first bracket 2, so that the rotation direction and the height of the second bracket 3 can be adjusted. The adjustment of the first bracket 2 and the second bracket 3 can be combined to enable the optical element 5 to achieve any posture within a certain range, so as to meet the adjustment requirement of the optical element 5.
After the position of the optical element 5 is adjusted, the hemispherical groove 7 of the bottom plate, the spherical structure 8 of the first bracket, the cylinder 9 of the first bracket and the crescent groove of the second bracket have high processing precision and smooth surfaces, so that the hemispherical groove 7 of the bottom plate 1 and the spherical structure 8 of the first bracket 2, the cylinder 9 of the first bracket 2 and the crescent groove on the adjustable mechanism 10 of the second bracket 3 respectively form optical contact, namely the contact gap is smaller than lambda/4, van der Waals force is formed between contact surfaces, and the first bracket 2 and the bottom plate 1 and the embedded position of the first bracket 2 and the second bracket 3 are temporarily bonded. The position of the optical element 5 is fixed by welding with the femtosecond laser focused on the fitting contact surface.
3) After the welding is finished, the first clamp 6 and the second clamp 4 are respectively taken down from the first bracket 2 and the second bracket 3 by using the dispergator, so that the optical element 5 is permanently fixed, is not easy to age and has extremely strong environmental resistance.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (8)
1. An optical element fixing device based on femtosecond laser welding, which is characterized in that: comprises a bottom plate, a first bracket and a second bracket;
the first bracket comprises an angle adjusting mechanism and an embedded part fixed above the angle adjusting mechanism, a containing mechanism matched with the bottom of the angle adjusting mechanism is arranged on the bottom plate, and before the first bracket and the bottom plate are welded by femtosecond laser, the first bracket is universally adjustable through the angle adjusting mechanism;
the second bracket comprises an adjustable mechanism arranged at the lower end of the second bracket, the adjustable mechanism is connected with the first bracket in a jogged way through the jogged part, and the upper end of the second bracket is welded with the optical element through femtosecond laser; and before the second bracket and the first bracket are welded by the femtosecond laser, the second bracket adjusts the height and the rotation direction through the adjustable mechanism.
2. The optical element fixing apparatus based on femtosecond laser welding as set forth in claim 1, wherein: the optical element fixing device based on the femtosecond laser welding further comprises a first clamp and a second clamp; the first clamp and the second clamp are externally connected with an adjusting tool; the first clamp clamps the first bracket; the second clamp clamps the second bracket.
3. The optical element fixing apparatus based on femtosecond laser welding as set forth in claim 1, wherein: the angle adjusting mechanism is of a spherical structure, the embedded part is a cylinder, and the upper end of the spherical structure is connected with the lower end of the cylinder; the accommodating mechanism is a hemispherical groove arranged on the upper surface of the bottom plate; the lower end of the spherical structure is embedded into the hemispherical groove;
the spherical structure can be rotated within the hemispherical recess prior to the femtosecond laser welding of the first support to the base plate.
4. The optical element fixing apparatus based on femtosecond laser welding as set forth in claim 3, wherein: the contact gap between the spherical structure and the hemispherical groove is smaller than lambda/4.
5. The optical element fixing apparatus based on femtosecond laser welding as set forth in claim 3, wherein: the upper end of the second bracket is a flat plate, the upper surface of the flat plate is a plane, and the upper surface is connected with the optical element in a welding way; the adjustable mechanism is connected with the lower surface of the flat plate and is provided with a crescent groove which is matched with the cylinder of the first bracket;
before the second bracket and the first bracket are welded by the femtosecond laser, the cylinder of the first bracket is connected with the adjustable mechanism of the second bracket in a jogged way, and the second bracket can rotate around the cylinder and move up and down on the cylinder.
6. The femtosecond laser welding-based optical element fixing apparatus as set forth in claim 5, wherein: the contact gap between the upper surface of the plate and the lower surface of the optical element is less than lambda/4.
7. The femtosecond laser welding-based optical element fixing apparatus as set forth in claim 5, wherein: the contact clearance between the crescent-shaped groove and the cylinder of the first bracket is smaller than lambda/4.
8. The optical element fixing apparatus based on femtosecond laser welding as set forth in claim 1, wherein: the bottom plate, the first support, the second support and the optical element are all devices made of glass or sapphire materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321807270.4U CN220718117U (en) | 2023-07-10 | 2023-07-10 | Optical element fixing device based on femtosecond laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321807270.4U CN220718117U (en) | 2023-07-10 | 2023-07-10 | Optical element fixing device based on femtosecond laser welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220718117U true CN220718117U (en) | 2024-04-05 |
Family
ID=90493907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321807270.4U Active CN220718117U (en) | 2023-07-10 | 2023-07-10 | Optical element fixing device based on femtosecond laser welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220718117U (en) |
-
2023
- 2023-07-10 CN CN202321807270.4U patent/CN220718117U/en active Active
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