CN211576111U

CN211576111U - Optical lens piece curved surface radius measuring device

Info

Publication number: CN211576111U
Application number: CN202020381753.2U
Authority: CN
Inventors: 夏晓明
Original assignee: II VI Optics Suzhou Co Ltd
Current assignee: II VI Optics Suzhou Co Ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-09-25
Anticipated expiration: 2030-03-24

Abstract

The utility model discloses an optical lens piece curved surface radius measuring device, include: the device comprises a pneumatic valve, a clamp assembly and a laser interferometer; the clamp assembly is arranged in a hollow structure and is connected with the air compression device through an air pressure valve; the fixture assembly comprises a connecting fixture, a fixing fixture and a curvature fixture, the connecting fixture is connected with the curvature fixture through the fixing fixture, the connecting fixture is connected with the pneumatic valve through a pneumatic tube, the lens is connected to the curvature fixture, and the lens and the curvature fixture are coaxially arranged; the mirror is located on the optical axis of the laser interferometer. In this way, the utility model discloses can press from both sides fast and get optical lens piece, be applicable to and press from both sides and get minor diameter lens and limit thickness lens, get rid of thickness/the less lens of diameter and receive the clamping force and warp the condition of influence, protection lens that can be fine avoids its surface damage, makes the measuring result of lens more accurate.

Description

Optical lens piece curved surface radius measuring device

Technical Field

The utility model relates to a technical field is measured to the lens, especially relates to an optical lens piece curved surface radius measuring device.

Background

The curvature radius of the optical lens is an important functional parameter, and plays a fundamental role in the design of the whole laser equipment. For this parameter, the current measurement technology mainly uses a sphere diameter instrument or a laser interferometer to measure. The adoption of the sphere diameter instrument for measurement is an indirect measurement mode, the measurement precision is low, and the specification requirement of high-precision parts cannot be met. The laser interferometer is adopted for measurement, the measurement precision can reach the nm level, and the precision meets the requirement.

When a laser interferometer is used for measurement, the lens fixing mode in the prior art adopts a clamping mode that a three-jaw self-centering clamp clamps the cylindrical surface of a lens, although the operation is convenient, the lens clamped by the three-jaw self-centering clamp has requirements on the thickness of the cylindrical surface of the optical lens, and the optical lens with the thickness of less than 3mm cannot be clamped, so that the lens is easy to collapse and damage parts; meanwhile, the diameter of the optical lens is also required to a certain extent, and the optical lens with too small diameter (the diameter is less than or equal to 10mm) can not be clamped; and the clamping force when the self-centering clamp clamps the optical lens, particularly the optical lens with the thickness/diameter ratio less than 1/11 is easy to deform, so that the measurement result is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides an optical lens piece curved surface radius measuring device, can press from both sides fast and get optical lens piece, is applicable to the clamp and gets minor diameter lens and limit thickness lens, avoids its surface damage.

In order to achieve the above object, the technical solution of the present invention is:

an optical lens curve radius measuring device, comprising: the device comprises a pneumatic valve, a clamp assembly and a laser interferometer; the clamp assembly is arranged to be a hollow structure and is connected with the air compression device through the air pressure valve; the fixture assembly comprises a connecting fixture, a fixing fixture and a curvature fixture, the connecting fixture is connected with the curvature fixture through the fixing fixture, the connecting fixture is connected with the pneumatic valve through an air pipe, the lens is connected to the curvature fixture, and the lens and the curvature fixture are coaxially arranged; the lens is positioned on the optical axis of the laser interferometer.

Preferably, the connecting clamp comprises a first connecting end and a second connecting end, the diameter of the first connecting end is smaller than that of the second connecting end, the first connecting end is connected with the pneumatic valve, and the second connecting end is connected with the fixing clamp.

Preferably, the curvature fixture comprises a supporting block and a positioning block, one end of the supporting block extends into the fixing fixture, the positioning block is arranged on the outer circle of the supporting block, and the positioning block is connected with the fixing fixture in a butting mode.

Preferably, a groove is formed in one end, in contact with the lens, of the supporting block, and a sealing ring is arranged in the groove.

Preferably, the inner diameter of the supporting block is 1/3-1/2 of the diameter of the lens.

Preferably, the fixing clamp comprises a fixing block and a connecting block, the connecting block is connected to one end, close to the connecting clamp, of the fixing block, the connecting block is in abutting connection with the connecting clamp, and the fixing block is in abutting connection with the curvature clamp; the vertical cross-sectional area of the connecting block is larger than that of the fixing block, and the connecting block and the fixing block are coaxially arranged.

Preferably, a groove is formed in one end, in contact with the curvature fixture, of the fixing block, and a sealing ring is arranged in the groove.

Preferably, the vertical section of the connecting block is polygonal.

Preferably, the vertical section of the connecting block is quadrilateral or hexagonal.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model has the following beneficial effect:

the utility model provides an optical lens piece curved surface radius measuring device compresses the air in the anchor clamps subassembly and adsorbs the lens on the anchor clamps subassembly, realizes getting fast and gets optical lens piece, is applicable to and presss from both sides to get minor diameter lens and limit thickness lens, has got rid of the less lens of thickness/diameter and has used the centre gripping formula to press from both sides the condition of clamping force and deformation influence when getting, protection lens piece that can be fine avoids its surface damage, makes the measuring result of lens more accurate.

Drawings

Fig. 1 is a schematic structural view of the device for measuring the radius of a curved surface of an optical lens of the present invention.

Fig. 2 is a schematic structural diagram of a clamp assembly in the device for measuring the radius of a curved surface of an optical lens of the present invention.

Fig. 3 is an exploded view of a clamp assembly in the device for measuring the radius of a curved surface of an optical lens of the present invention.

Fig. 4 is a schematic structural diagram of a pneumatic valve in the device for measuring the radius of a curved surface of an optical lens of the present invention.

Description of reference numerals:

the air pressure valve 1, the air inlet 11 and the air outlet 12;

an air pipe 2;

the clamp assembly 3, the connecting clamp 31, the connecting first end 311, the connecting second end 312, the fixing clamp 32, the fixing block 321, the connecting block 322, the sealing ring 323, the curvature clamp 33, the supporting block 331 and the positioning block 332;

a laser interferometer 4, a three-jaw jig 41;

and (5) a lens.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to the drawings, an apparatus for measuring the radius of a curved surface of an optical lens includes: a pneumatic valve 1, a clamp assembly 3 and a laser interferometer 4. The lens 5 is connected to the clamp assembly 3, the clamp assembly 3 is connected with the air pressure valve 1 through the air pipe 2, the clamp assembly 3 is of a hollow structure, the clamp assembly 3 is connected with an air compression device (not shown in the figure) through the air pressure valve 1, the lens 5 is located on the optical axis of the laser interferometer 4, and curvature measurement is conducted on the lens 5 through the laser interferometer 4. Fix lens 5 through anchor clamps subassembly 3, lens 5 and the coaxial setting of anchor clamps subassembly 3 for the adsorption affinity that lens 5 received is even, thereby avoids lens 5 to damage because of the atress is uneven when guaranteeing to adsorb lens 5. The pneumatic valve 1 and the laser interferometer 4 can be selected from those in the prior art, and are not described herein.

The air pressure valve 1 is provided with an air valve with an upper end air inlet 11 and two lower end air outlets 12, the air inlet 11 is connected with an air compression device through an air pipe 2, the two air outlets 12 are respectively connected onto a connecting clamp 31 through the air pipe 2, and an air pressure adjusting valve is connected to one air outlet 12, so that the air pressure of one air outlet 12 guarantees the suction force of a base, the air pressure of one air outlet 12 is adjustable, the suction force of negative pressure can be controlled by adjusting the air pressure of different to-be-detected lenses 5, and the fixing of the to-be-detected lenses 5 is guaranteed.

The clamp assembly 3 comprises a connecting clamp 31, a fixing clamp 32 and a curvature clamp 33, wherein the connecting clamp 31 and the curvature clamp 33 are connected through the fixing clamp 32, and the connecting clamp 31 and the fixing clamp 32, and the fixing clamp 32 and the curvature clamp 33 can be in threaded connection. The connecting clamp 31 is connected with the pneumatic valve 1 through the air pipe 2, and the lens 5 is coaxially arranged with the curvature clamp 33.

The connecting clamp 31 comprises a first end 311 and a second end 312, the diameter of the first end 311 is smaller than that of the second end 312, different-size components are connected through different matching of the diameters of the two ends of the connecting clamp 31, the first end 311 is connected with the air pressure valve 1, the second end 312 is connected with the fixing clamp 32, and negative pressure acts on a workpiece to be measured.

The curvature fixture 33 comprises a supporting block 331 and a positioning block 332, one end of the supporting block 331 extends into the fixing fixture 32, the positioning block 332 is arranged outside the supporting block 331 in a circle, and the positioning block 332 is connected with the fixing fixture 32 in an abutting mode. The size of the supporting block 331 can be determined according to the size of the lens 5 to be measured, and the inner diameter of the supporting block 331 is 1/3-1/2 of the diameter of the lens 5.

In order to avoid damage of the supporting block 331 to the lens 5, a groove is formed in one end, in contact with the lens 5, of the supporting block 331, a sealing ring is arranged in the groove, the sealing ring protrudes out of the groove, the sealing ring can be made of rubber, and the supporting block 331 is in contact with the lens 5 through the sealing ring.

The fixing clamp 32 comprises a fixing block 321 and a connecting block 322, the connecting block 322 is connected to one end, close to the connecting clamp 31, of the fixing block 321, the connecting block 322 is connected with the connecting clamp 31 in an abutting mode, and the fixing block 321 is connected with the curvature clamp 33 in an abutting mode. The vertical cross-sectional area of the connecting block 322 is larger than that of the fixing block 321, and the connecting block 322 and the fixing block 321 are coaxially arranged.

In order to improve the sealing performance of the joint of the fixing block 321 and the curvature fixture 33, a groove is formed in one end, in contact with the curvature fixture 33, of the fixing block 321, and a sealing ring 323 is arranged in the groove, so that air leakage cannot occur after the curvature fixture 33 is installed.

The vertical section of the connecting block 322 is polygonal, and may preferably be quadrilateral or hexagonal, similar to the quadrilateral shape of the nut or the hexagonal shape of the nut, so as to facilitate the fixing and tightening of the clamp during the installation process.

In the actual measurement process, the air inlet 11 of the air pressure valve 1 is connected with the air pipe 2 to obtain suction force, the air pressure valve 1 is adjusted to provide different air pressures for the lenses 5 to be measured with different sizes to obtain pressures corresponding to parts, and the air pipe 2 is connected to the connecting clamp 31 from the air pressure valve 1. The connecting clamp 31 is connected to the fixing clamp 32, the fixing clamp 32 is conveniently placed on the three-jaw clamp 41 matched with the laser interferometer 4 for clamping, then the curvature clamp 33 is connected to the fixing clamp 32, and the joint is sealed by using a sealing ring. Then, the workpiece to be measured is installed at the curvature clamp 33, negative pressure is generated by an air compression device, the workpiece is adsorbed on the curvature clamp 33, the surface of the lens 5 is protected and sealing is guaranteed by using a sealing ring, and then the curvature is measured by using the laser interferometer 4.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. An apparatus for measuring the radius of a curved surface of an optical lens, comprising: the device comprises a pneumatic valve, a clamp assembly and a laser interferometer; the clamp assembly is arranged to be a hollow structure and is connected with the air compression device through the air pressure valve; the fixture assembly comprises a connecting fixture, a fixing fixture and a curvature fixture, the connecting fixture is connected with the curvature fixture through the fixing fixture, the connecting fixture is connected with the pneumatic valve through an air pipe, the lens is connected to the curvature fixture, and the lens and the curvature fixture are coaxially arranged; the lens is positioned on the optical axis of the laser interferometer.

2. The apparatus for measuring the radius of curvature of an optical lens according to claim 1, wherein: the connecting clamp comprises a first end and a second end, the diameter of the first end is smaller than that of the second end, the first end is connected with the pneumatic valve, and the second end is connected with the fixing clamp.

3. The apparatus for measuring the radius of curvature of an optical lens according to claim 1, wherein: the curvature fixture comprises a supporting block and a positioning block, one end of the supporting block extends into the fixing fixture, the positioning block is arranged in a circle outside the supporting block, and the positioning block is connected with the fixing fixture in a butting mode.

4. The apparatus for measuring the radius of curvature of an optical lens according to claim 3, wherein: the supporting block is provided with a groove at one end in contact with the lens, and a sealing ring is arranged in the groove.

5. The apparatus for measuring the radius of curvature of an optical lens according to claim 3, wherein: the inner diameter of the supporting block is 1/3-1/2 of the diameter of the lens.

6. The apparatus for measuring the radius of curvature of an optical lens according to claim 1, wherein: the fixing clamp comprises a fixing block and a connecting block, the connecting block is connected to one end, close to the connecting clamp, of the fixing block, the connecting block is in abutting connection with the connecting clamp, and the fixing block is in abutting connection with the curvature clamp; the vertical cross-sectional area of the connecting block is larger than that of the fixing block, and the connecting block and the fixing block are coaxially arranged.

7. The apparatus for measuring the radius of curvature of an optical lens according to claim 6, wherein: the end of the fixed block, which is in contact with the curvature fixture, is provided with a groove, and a sealing ring is arranged in the groove.

8. The apparatus for measuring the radius of curvature of an optical lens according to claim 6, wherein: the vertical section of the connecting block is polygonal.

9. The apparatus for measuring the radius of curvature of an optical lens according to claim 6, wherein: the vertical section of the connecting block is quadrilateral or hexagonal.