CN211178342U - Clamping device in interference detection of high-precision optical element - Google Patents
Clamping device in interference detection of high-precision optical element Download PDFInfo
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- CN211178342U CN211178342U CN201921944189.4U CN201921944189U CN211178342U CN 211178342 U CN211178342 U CN 211178342U CN 201921944189 U CN201921944189 U CN 201921944189U CN 211178342 U CN211178342 U CN 211178342U
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Abstract
The utility model relates to a clamping device in interference detection of high-precision optical elements, which comprises a base; two sides of the base are respectively provided with a group of supporting columns; one side of each group of connecting and pushing parts is connected with the supporting column; the other side of each group of the connecting pushing parts is correspondingly connected with one group of the clamping parts, and the two groups of the clamping parts are clamped or loosened along opposite directions; each group of clamping parts is provided with an elastic piece which is abutted against the side surface of the optical element; the force sensor is fixed on the connecting pushing part and used for measuring the reaction force of the clamping part on the clamping force of the optical element. The optical element is clamped by the base and the clamping parts on two sides at three points, so that the stability of clamping the optical element is ensured, and the elastic part is favorable for improving the uniformity of the clamping force of the clamping parts on the optical element, so that the deformation of the optical element and the influence of the deformation on the detection precision are reduced; the force sensor is used for measuring the counterforce of the clamping part on the clamping force of the optical element and providing reference for adjusting the clamping force in the clamping process.
Description
Technical Field
The utility model relates to an optical element detects auxiliary device technical field, and more specifically the clamping device that relates to a high accuracy optical element interferes in detecting that says so.
Background
The optical interferometer is a precision measuring instrument for measuring the surface shape error of an optical element based on the interference principle of light. In the optical interferometer, monochromatic light emitted by a laser device is converted into parallel light in a light path after passing through a collimating objective lens, then the parallel light is split and projected to a reference reflecting mirror and an optical element to be measured, and the surface shape error of the optical element is obtained by solving according to interference fringes of a reference light beam and a test light beam. When the optical interferometer is used for detecting the surface shape error of the high-precision optical element, the optical element is clamped and held by the detection clamp, the detection clamp is placed on the adjusting platform, and the positions and postures of the detection clamp and the optical element are adjusted through the adjusting platform, so that the surface to be detected of the optical element is perpendicular to an interference light path of the optical interferometer.
However, when the optical element is clamped and held by the detection jig, the optical element is placed on the pad of the detection jig, and the side edge of the optical element is clamped by the clamping block of the detection jig. The spacer blocks and the clamping blocks are usually made of plastic material in order to prevent them from damaging the optical element when they come into contact and collide with the optical element. The plastic spacer is usually not accurate, and its flatness is about millimeter and sub millimeter magnitude, so the optical element is put on the plastic spacer and is easy to generate local stress concentration effect, thereby causing the deformation of the optical element and affecting the detection accuracy. Meanwhile, the detection clamp controls the clamping force of the clamping block on the side edge of the element through the adjusting knob, the optical element is easy to shake when the clamping force is small, so that a normal interference fringe pattern is influenced, and the clamping block is easy to cause deformation of the optical element and influence detection precision when the clamping force is large because the contact surface of the clamping block and the element also has a certain flatness error. Therefore, how to provide a clamping device is a problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least
Therefore, an object of the utility model is to provide a clamping device in high accuracy optical element interference detection, solved among the prior art optical detection component and detected that the clamping force is inhomogeneous in the measuring, the influence detects the technical problem of precision.
The utility model provides a clamping device in high accuracy optical element interference detection, include:
A base;
Two groups of supporting columns are arranged on two sides of the base respectively;
Two groups of connecting pushing parts, wherein one side of each group of connecting pushing part is connected with the supporting column;
The other side of each group of the connecting pushing parts is correspondingly connected with one group of the clamping parts, and the two groups of the clamping parts are clamped or loosened along opposite directions;
Each group of clamping parts is provided with an elastic piece which is abutted against the side surface of the optical element G;
And the force sensor is fixed on the connecting pushing part and is used for measuring the reaction force of the clamping part on the clamping force of the optical element G.
According to the technical scheme, compared with the prior art, the utility model discloses a clamping device in high accuracy optical element interference detection is provided, optical element passes through the base, the clamping part three-point clamping of both sides, has guaranteed optical element's stability of location, all has the elastic component with optical element side butt on every group of clamping part simultaneously, is favorable to improving the homogeneity of clamping force of clamping part to optical element to reduce optical element deformation and its influence to detecting the precision; meanwhile, the force sensor is fixed on the connecting and pushing part and used for measuring the reaction force of the clamping part to the clamping force of the optical element, and reference is provided for adjusting the clamping force in the clamping process.
Preferably, the base has a U-shaped cross section, a cushion block is fixed in the U-shaped cross section, and the U-shaped cross section improves the rigidity of the base and reduces the deformation of the base and the cushion block.
Preferably, the cushion block is provided with a buffer piece, the top of the buffer piece is abutted to the bottom of the optical element, the thickness of the buffer piece is larger than 5mm, and the uniformity of the clamping force of the optical element in the clamping process is further improved.
Preferably, the cushioning element is made of foam, which is glued to the base.
Preferably, the clamping part is a clamping block, a clamping groove is formed in the clamping block, and the thickness value of the elastic part is smaller than the depth value of the groove. Therefore, the stability of fixing the optical element by the clamping block is ensured, and the clamping block is also suitable for clamping optical elements with different structural shapes.
Preferably, the elastic part is made of foam, is bonded to the bottom of the clamping groove and has a thickness of 8mm-10 mm.
Preferably, the support column is provided with a threaded hole and a connecting lug, the threaded hole is perpendicular to the axis direction of the support column, the connecting lug is fixed on two sides of the threaded hole, and two sides of the connecting lug are provided with a first guide hole
Preferably, the support column is provided with a plurality of groups of threaded holes and a plurality of groups of connecting lugs, each group of threaded holes are perpendicular to the axis direction of the support column and are arranged, each group of connecting lugs are fixed on two sides of the corresponding threaded holes, and two sides of each group of connecting lugs are provided with a first guide hole, so that the position of the clamping part on the support column can be adjusted according to the height dimension of the optical element, the clamping stability is ensured, and the universality of clamping is improved.
Preferably, the connecting and pushing part comprises a screw rod, a push plate, two groups of connecting guide rods and two groups of springs; the screw is matched with the threaded hole, one end of the screw is an operation end, and the other end of the screw is connected with the push plate; two groups of guide holes II are formed in the push plate, one end of each group of connecting guide rods passes through the guide holes II and then is fixed with the clamping part, and the other end of each group of connecting guide rods extends out of the guide holes I; each group of springs is sleeved between the clamping part and the push plate; the force sensor is fixed at the other end of the screw rod and is close to the push plate. The clamping part is driven to move towards the advancing direction to be close to the optical element by the connecting guide rod, and the force sensor detects the force generated by the butting of the clamping part and the optical element and reacting on the screw rod and is used as a reference for adjusting the clamping force; the spring plays a role in buffering in the advancing process and plays a role in returning in the retreating process.
Preferably, the force sensor is provided with a display screen, the counterforce of the clamping force is displayed, the direct checking in the adjusting process is facilitated, the clamping difficulty is reduced, and the clamping process is simplified. The force sensor model was an orlon AD2015E force sensor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a working state of a clamping device for high-precision optical element interference detection, which is applied to clamping an optical element according to the present invention;
Fig. 2 is a schematic structural diagram of a clamping device in interference detection of a high-precision optical element according to the present invention;
FIG. 3 is a partially enlarged schematic view of a clamping device for high-precision optical component interference detection according to the present invention;
In the figure: 100-base, 101-cushion block, 200-support column, 201-connecting lug, 300-connecting pushing part, 301-screw rod, 302-push plate, 303-connecting guide rod, 304-spring, 400-clamping part, 500-elastic part, 600-force sensor, 700-buffer part and G-optical element.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment of the utility model discloses clamping device in high accuracy optical element interference detection has solved among the prior art optical detection component and has detected the clamping force inhomogeneous in the dress, influences the technical problem who detects the precision.
Referring to fig. 1-3, the present invention provides a clamping device for high-precision optical component interference detection, including:
A base 100;
Two groups of supporting columns 200 are respectively arranged at two sides of the base 100;
Two sets of connection pushing parts 300, wherein one side of each set of connection pushing part 300 is connected with the supporting column 200;
Two groups of clamping parts 400, wherein the other side of each group of connecting pushing part 300 is correspondingly connected with one group of clamping parts 400, and the two groups of clamping parts 400 perform clamping or loosening motion along opposite directions;
An elastic member 500, each group of the clamping portions 400 having the elastic member 500 abutting against the side surface of the optical element G;
And a force sensor 600, the force sensor 600 is fixed on the connection pushing part 300 and used for measuring the reaction force of the clamping part 400 to the clamping force of the optical element G.
The utility model discloses a clamping device in interference detection of high-precision optical elements, the optical elements are clamped by three points through clamping parts on a base and two sides, the stability of optical element clamping is ensured, and meanwhile, each group of clamping parts is provided with an elastic part which is abutted against the side surface of the optical element, which is beneficial to improving the uniformity of the clamping force of the clamping parts on the optical elements, thereby reducing the deformation of the optical elements and the influence thereof on the detection precision; meanwhile, the force sensor is fixed on the connecting and pushing part and used for measuring the reaction force of the clamping part to the clamping force of the optical element, and reference is provided for adjusting the clamping force in the clamping process.
Advantageously, the base 100 has a U-shaped cross-section, in which the pad 101 is fixed, the U-shaped cross-section increases the rigidity of the base and reduces the deformation of the base and the pad.
More advantageously, the cushion block 101 is provided with a buffer member 700, the top of the buffer member 700 abuts against the bottom of the optical element G, and the thickness of the buffer member 700 is greater than 5mm, so that the uniformity of the clamping force on the optical element during the clamping process is further improved.
Specifically, the bumper 700 is made of foam, which is bonded to the base 100.
In an embodiment of the present invention, the clamping portion 400 is a clamping block, on which a clamping groove is formed, and the thickness of the elastic member 500 is smaller than the depth of the groove. Therefore, the stability of fixing the optical element by the clamping block is ensured, and the clamping block is also suitable for clamping optical elements with different structural shapes.
Wherein, the elastic member 500 is made of foam, the elastic member 500 is bonded at the bottom of the clamping groove, and the thickness of the elastic member is 8mm-10 mm.
In another embodiment provided by the present invention, referring to fig. 1, the supporting pillar 200 is provided with a threaded hole and a connecting lug 201, the threaded hole is arranged perpendicular to the axis direction of the supporting pillar 200, the connecting lug 201 is fixed on two sides of the threaded hole, and two sides of the connecting lug 201 are both provided with a first guiding hole.
In other embodiments provided by the present invention, referring to fig. 2, a plurality of sets of threaded holes and a plurality of sets of connecting lugs 201 are provided on the supporting pillar 200, each set of threaded holes is arranged perpendicular to the axial direction of the supporting pillar 200, each set of connecting lugs 201 is fixed on two sides of the corresponding threaded hole, and two sides of each set of connecting lugs 201 are provided with a first guiding hole; therefore, the position of the clamping part on the supporting column can be adjusted according to the height size of the optical element, the clamping stability is guaranteed, and meanwhile the clamping universality is increased.
Specifically, referring to fig. 3, the connection pushing part 300 includes a screw 301, a push plate 302, two sets of connection guide rods 303, and two sets of springs 304; the screw 301 is matched with the threaded hole, one end of the screw is an operation end, and the other end of the screw is connected with the push plate 302; two groups of second guide holes are formed in the push plate 302, one end of each group of connecting guide rods 303 passes through the second guide holes and then is fixed with the clamping part 400, and the other end of each group of connecting guide rods extends out of the first guide holes; each group of springs 304 is sleeved between the clamping part 400 and the push plate 302; the force sensor 600 is fixed at the other end of the screw 301 close to the push plate 302. The clamping part is driven to move towards the advancing direction to be close to the optical element by the connecting guide rod, and the force sensor detects the force generated by the butting of the clamping part and the optical element and reacting on the screw rod and is used as a reference for adjusting the clamping force; the spring plays a role in buffering in the advancing process and plays a role in returning in the retreating process.
Advantageously, force sensor 600 has the display screen, shows the reaction force of clamping-force, makes things convenient for the adjustment in-process to directly look over, has reduced the degree of difficulty of clamping, has simplified the clamping process. The force sensor model was an orlon AD2015E force sensor.
Adopted the utility model provides a pair of clamping device in high accuracy optical element interference detection has improved the homogeneity of clamping-force, it is adjustable to have realized the clamping-force, during the optical element centre gripping, put optical element on the foam of cushion, set for optical element's side direction clamping-force, after putting optical element's position appearance, thereby manual rotation screw rod control grip block acts on optical element's clamping-force reaches the setting value, can look over the clamping-force that the grip block acted on optical element in real time through force sensor during manual rotation screw rod. After clamping is completed, the device can be placed in the optical path of the optical interferometer to detect the surface shape error of the optical element.
the specific application example is that the clamping device is used for clamping an optical element made of 600mm × 400mm multiplied by 80mm K9, the optical element is placed on foam of a cushion block, the lateral clamping force of the optical element is set to be 20N, after the posture of the optical element is adjusted, the clamping force of a clamping block acting on the optical element is controlled to reach 20N by manually rotating a screw rod, the clamping force of the clamping block acting on the optical element is checked in real time through a force sensor when the screw rod is manually rotated, and after the clamping is completed, the clamping device can be placed in an optical path of an optical interferometer to detect the surface shape error of the optical element.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A clamping device in high-precision optical element interference detection is characterized by comprising:
A base (100);
Two groups of supporting columns (200), wherein one group of supporting columns (200) is arranged on each of two sides of the base (100);
Two groups of connecting pushing parts (300), wherein one side of each group of connecting pushing parts (300) is connected with the supporting column (200);
The other side of each group of the clamping parts (400) is correspondingly connected with one group of the clamping parts (400) and the two groups of the clamping parts (400) are clamped or loosened along opposite directions;
An elastic member (500), wherein each group of the clamping parts (400) is provided with the elastic member (500) which is abutted with the side surface of the optical element (G);
And the force sensor (600) is fixed on the connecting pushing part (300) and used for measuring the reaction force of the clamping part (400) to the clamping force of the optical element (G).
2. The clamping device for the interference detection of the high-precision optical element according to claim 1, wherein the base (100) has a U-shaped cross section, and a cushion block (101) is fixed in the base.
3. The clamping device for high-precision optical element interference detection according to claim 2, wherein a buffer (700) is arranged on the cushion block (101), and the top of the buffer (700) abuts against the bottom of the optical element (G).
4. The clamping device for high-precision optical element interference detection according to claim 3, wherein the buffer member (700) is made of foam and is adhered to the base (100).
5. The clamping device for high-precision optical element interference detection according to claim 1, wherein the clamping portion (400) is a clamping block, a clamping groove is formed in the clamping block, and the thickness of the elastic member (500) is smaller than the depth of the groove.
6. The clamping device for high-precision optical component interference detection according to claim 5, wherein the elastic member (500) is made of foam, the elastic member (500) is adhered to the bottom of the clamping groove, and the thickness of the elastic member is 8mm-10 mm.
7. The clamping device for high-precision optical element interference detection according to claim 6, wherein the supporting column (200) is provided with a threaded hole and a connecting lug (201), the threaded hole is arranged perpendicular to the axial direction of the supporting column (200), the connecting lug (201) is fixed on two sides of the threaded hole, and two sides of the connecting lug (201) are provided with a first guiding hole.
8. The clamping device for high-precision optical element interference detection according to claim 6, wherein a plurality of groups of threaded holes and a plurality of groups of connecting lugs (201) are arranged on the supporting column (200), each group of threaded holes is arranged perpendicular to the axial direction of the supporting column (200), each group of connecting lugs (201) is fixed on two sides of the corresponding threaded hole, and each group of connecting lugs (201) is provided with one guiding hole on two sides.
9. The clamping device for high-precision optical element interference detection according to claim 7 or 8, wherein the connecting pushing portion (300) comprises a screw (301), a pushing plate (302), two sets of connecting guide rods (303) and two sets of springs (304); the screw (301) is matched with the threaded hole, one end of the screw is an operation end, and the other end of the screw is connected with the push plate (302); two groups of guide holes II are formed in the push plate (302), one end of each group of connecting guide rods (303) passes through the guide holes II and then is fixed with the clamping part (400), and the other end of each group of connecting guide rods extends out of the guide holes I; each group of springs (304) is sleeved between the clamping part (400) and the push plate (302); the force sensor (600) is fixed at the other end of the screw (301) close to the push plate (302).
10. The clamping device for high-precision optical element interference detection according to any one of claims 1-8, wherein the force sensor (600) is provided with a display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921944189.4U CN211178342U (en) | 2019-11-12 | 2019-11-12 | Clamping device in interference detection of high-precision optical element |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921944189.4U CN211178342U (en) | 2019-11-12 | 2019-11-12 | Clamping device in interference detection of high-precision optical element |
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| CN211178342U true CN211178342U (en) | 2020-08-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954016A (en) * | 2019-11-12 | 2020-04-03 | 中国工程物理研究院激光聚变研究中心 | Clamping device in interference detection of high-precision optical element |
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2019
- 2019-11-12 CN CN201921944189.4U patent/CN211178342U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954016A (en) * | 2019-11-12 | 2020-04-03 | 中国工程物理研究院激光聚变研究中心 | Clamping device in interference detection of high-precision optical element |
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