Novel lens polishing pressure head

Abstract

The novel lens polishing pressure head comprises a connecting section, a transition section and a polishing section which are coaxially arranged, the connecting section is connected with the polishing section through the transition section to form the pressure head, a through cavity is formed in the inner side of the pressure head, and the through cavity comprises a connecting cavity, a transition cavity, an air hole and an arc-shaped groove which are coaxially arranged and communicated with one another. The center axis of the pressing head and the center axis of the through cavity are located on the same straight line, and the curvature of the groove can correspond to a polished lens so that the groove can be better attached to the lens in the polishing process. The novel lens polishing pressure head further has the advantages that the structure is stable, the uniform polishing effect can be achieved, and damage to the lens is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lens polishing equipment field, concretely is a novel lens polishing pressure head. BACKGROUND

[0002] Calcium fluoride crystal plays an important role in industrial applications and scientific research fields due to its excellent optical and physical and chemical properties. In particular, in the fields of ultraviolet lithography, astronomical observation, aerial survey, reconnaissance and high-resolution optical instruments, calcium fluoride crystal becomes the first choice material due to its high ultraviolet transmittance, high laser damage threshold, low birefringence and high refractive index uniformity. However, calcium fluoride crystal has low hardness, is easy to break and has high thermal expansion coefficient, which poses challenges to high-precision machining, especially in the polishing process of narrow-edge calcium fluoride lenses, which is easy to cause crystal cracking and affect product quality and service life. SUMMARY

[0003] The utility model discloses a novel lens polishing pressure head to solve one or more of the problems in the above background technology.

[0004] To achieve the above object, the utility model discloses a novel lens polishing pressure head, including coaxial connection section, transition section and polishing section, the connection section passes through the transition section and is connected with the polishing section and forms the pressure head, the inside of pressure head is equipped with through cavity, and through cavity includes the connection cavity, transition cavity, air hole and circular recess that are coaxially arranged and communicate with each other, and the central axis of pressure head is on the same straight line with the central axis of through cavity.

[0005] In some embodiments, the connection section, transition section and polishing section are integrally formed; the material of the pressure head is annealed copper, which is beneficial to ensure the durability and stability of the novel lens polishing pressure head during polishing.

[0006] In some embodiments, the connection section includes a first section body of a cylindrical type and a second section body of a circular truncated cone type, the outer diameter of the first section body is equal to the outer diameter of the top of the second section body, the outer diameter of the top of the second section body is greater than the outer diameter of the bottom of the second section body, the connection cavity is arranged in the first section body, and the transition cavity is arranged in the second section body;

[0007] The polishing section includes a third section body of a circular truncated cone type and a fourth section body of a cylindrical type, the outer diameter of the top of the third section body is less than the outer diameter of the bottom of the third section body, and the outer diameter of the bottom of the third section body is equal to the outer diameter of the fourth section body;

[0008] The transition section is in a cylindrical shape, and the outer diameter of the bottom of the second section body, the outer diameter of the transition section and the outer diameter of the top of the third section body are equal.

[0009] In some embodiments, the first segment is provided with a plurality of vertically arranged planes on the outer side, and the design of the planes facilitates the screwing of the novel lens polishing pressure head;

[0010] The included angle a4 of the opposite inclined surfaces on the second segment is 120°.

[0011] The included angle a3 between the second segment and the transition segment is 120°.

[0012] The included angle a2 between the transition segment and the third segment is 135°.

[0013] The included angle a1 of the opposite inclined surfaces on the third segment is 90°.

[0014] In some embodiments, the first segment is provided with two vertically arranged planes on the outer side, and the two planes are symmetrically distributed about the central axis of the pressure head.

[0015] In some embodiments, the length of the pressure head is greater than 2 times the length of the transition segment, the length of the pressure head is less than 3 times the length of the transition segment, the length of the connecting segment is greater than the length of the transition segment, the length of the third segment is greater than 2 times the length of the fourth segment, the length of the transition segment is greater than 3 times the length of the third segment, and the length of the transition segment is less than 4 times the length of the third segment. Through the design of the length structure, the structural strength and stability between the components of the pressure head structure can be better improved, and the service life of the novel lens polishing pressure head can be ensured.

[0016] In some embodiments, the connecting cavity is in a cylindrical shape, the cavity wall of the connecting cavity is provided with a screw thread, and the pressure head is connected to the pressure mechanism of the polishing equipment through the screw thread.

[0017] In some embodiments, the transition cavity is in a circular truncated cone shape, the diameter of the side end of the transition cavity close to the connecting cavity is greater than the diameter of the side end of the transition cavity close to the air hole, and the included angle a5 of the opposite inclined surfaces on the transition cavity is 120°.

[0018] In some embodiments, the groove is arranged corresponding to the lens to be polished, and a polyurethane soft pad is additionally arranged at the bottom of the groove, which is beneficial to realize uniform distribution of pressure in the polishing process and reduce the risk of calcium fluoride crystal cracking or scratching.

[0019] Compared with the prior art, the novel lens polishing pressure head has the advantages that uniform polishing effect can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic view of a novel lens polishing pressure head in some embodiments of the present application;

[0021] Figure 2 Figure 1 is a top view of the novel lens polishing indenter in some embodiments of the present application;

[0022] Figure 3 Figure 1 is a top view of the novel lens polishing indenter in some embodiments of the present application; Figure 2 Figure 1 is a top view of the novel lens polishing indenter in some embodiments of the present application;

[0023] Figure 4 Figure 1 is a top view of the novel lens polishing indenter in some embodiments of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be apparently and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0025] Please refer to Figures 1 to 4 Figure 1 is a top view of the novel lens polishing indenter in some embodiments of the present application. The novel lens polishing indenter comprises a connecting section, a transition section 103 and a polishing section arranged coaxially. The connecting section is connected with the polishing section through the transition section 103 to form the indenter. The inner side of the indenter is provided with a through cavity to generate vacuum adsorption in the application process of the novel lens polishing indenter. The through cavity comprises a connecting cavity 111, a transition cavity, a gas hole 112 and a circular-arc-shaped groove 113 arranged coaxially and communicated with each other. The central axis of the indenter is on the same straight line with the central axis of the through cavity.

[0026] The connecting section, the transition section 103 and the polishing section can be integrally formed. The material of the indenter can be red copper or the like. The top and the bottom of the indenter can be chamfered to avoid the edge of the indenter injuring the lens.

[0027] The connecting section comprises a first section body 101 in a cylindrical shape and a second section body 102 in a circular-truncated-cone shape. The outer diameter of the first section body 101 is equal to the outer diameter of the top of the second section body 102. The outer diameter of the top of the second section body 102 is greater than the outer diameter of the bottom of the second section body 102. The connecting cavity 111 is arranged in the first section body 101, and the transition cavity is arranged in the second section body 102.

[0028] The polishing section comprises a third section body 104 in a circular-truncated-cone shape and a fourth section body 105 in a cylindrical shape. The outer diameter of the top of the third section body 104 is smaller than the outer diameter of the bottom of the third section body 104. The outer diameter of the bottom of the third section body 104 is equal to the outer diameter of the fourth section body 105.

[0029] The transition section 103 is in a cylindrical shape. The outer diameter of the bottom of the second section body 102, the outer diameter of the transition section 103 and the outer diameter of the top of the third section body 104 are equal.

[0030] The outer side of the first section body 101 is provided with a plurality of vertically arranged planes, such as two vertically arranged planes 106 on the outer side of the first section body 101, which are symmetrically distributed about the center axis of the pressure head.

[0031] The included angle a4 of the opposite inclined surfaces on the second section body 102 can be 120°.

[0032] The included angle a3 between the second section body 102 and the transition section 103 can be 120°.

[0033] The included angle a2 between the transition section 103 and the third section body 104 can be 135°.

[0034] The included angle a1 of the opposite inclined surfaces on the third section body 104 can be 90°.

[0035] The length of the pressure head is greater than 2 times the length of the transition section 103, the length of the pressure head is less than 3 times the length of the transition section 103, the length of the connecting section is greater than the length of the transition section 103, the length of the third section body 104 is greater than 2 times the length S1 of the fourth section body 105, the length of the transition section 103 is greater than 3 times the length of the third section body 104, and the length of the transition section 103 is less than 4 times the length of the third section body 104.

[0036] The connecting cavity 111 is in a cylindrical shape, and the cavity wall of the connecting cavity 111 is provided with a screw thread, and the pressure head is connected to the pressure mechanism of the polishing equipment through the screw thread.

[0037] The transition cavity is in a circular truncated cone shape, the diameter of the side end of the transition cavity close to the connecting cavity 111 is greater than the diameter of the side end of the transition cavity close to the air hole 112, and the included angle a5 of the opposite inclined surfaces on the transition cavity can be 120°.

[0038] The curvature of the groove 113 corresponds to the lens to be polished, so that the groove 113 better fits the lens during polishing, ensuring the effect of pressing and fixing the lens; a polyurethane soft pad can be additionally arranged at the bottom of the groove 113, so as to better realize uniform distribution of pressure during polishing, and also prevent the lens from slipping off.

[0039] The above undisclosed matters can be realized by using the existing technology, and therefore will not be described here.

[0040] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " set ", " install ", " link ", " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected; can be mechanical connection, also can be electrical connection; can be directly connected, also can pass through intermediate medium indirectly connected, can be two element inside the communication, for ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0042] The above content is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the specific implementation of the utility model is limited to these descriptions, and for ordinary skilled person in the art of the utility model belongs to technical field, under the premise of not departing from the concept of the utility model, can also make a number of simple deductions or substitutions, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A novel lens polishing indenter characterized by, The lens polishing pressure head comprises coaxially arranged connecting section, transition section and polishing section, the connecting section is connected with the polishing section through the transition section to form a pressure head, the inside of the pressure head is provided with a through cavity, the through cavity comprises coaxially arranged connecting cavity, transition cavity, air hole and circular arc shaped groove which are communicated with each other, the central axis of the pressure head is in the same straight line with the central axis of the through cavity.

2. A novel lens polishing indenter according to claim 1, characterized in that: The connecting section, transition section and polishing section are integrally formed; the material of the pressure head is annealed copper.

3. The lens polishing pressure head according to claim 1 or 2, characterized in that: The connecting section comprises cylindrical first section body and circular truncated cone shaped second section body, the outer diameter of the first section body is equal to the outer diameter of the top of the second section body, the outer diameter of the top of the second section body is greater than the outer diameter of the bottom of the second section body, the connecting cavity is arranged in the first section body, and the transition cavity is arranged in the second section body; The polishing section comprises circular truncated cone shaped third section body and cylindrical fourth section body, the outer diameter of the top of the third section body is smaller than the outer diameter of the bottom of the third section body, and the outer diameter of the bottom of the third section body is equal to the outer diameter of the fourth section body; The transition section is in cylindrical shape, the outer diameter of the bottom of the second section body, the outer diameter of the transition section and the outer diameter of the top of the third section body are equal.

4. The lens polishing pressure head according to claim 3, characterized in that: The outer side of the first section body is provided with a plurality of vertically arranged planes; The included angle a4 of the opposite inclined surfaces of the second section body is 120°; The included angle a3 between the second section body and the transition section is 120°; The included angle a2 between the transition section and the third section body is 135°; The included angle a1 of the opposite inclined surfaces of the third section body is 90°.

5. A novel lens polishing indenter according to claim 3, characterized in that: The outer side of the first section body is provided with two vertically arranged planes, and the two planes are symmetrically distributed about the central axis of the pressure head.

6. A novel lens polishing indenter according to claim 3, characterized in that: The length of the pressure head is greater than 2 times the length of the transition section, the length of the pressure head is less than 3 times the length of the transition section, the length of the connecting section is greater than the length of the transition section, the length of the third section body is greater than 2 times the length of the fourth section body, the length of the transition section is greater than 3 times the length of the third section body, and the length of the transition section is less than 4 times the length of the third section body.

7. A novel lens polishing indenter according to claim 1, characterized in that: The connecting cavity is in cylindrical shape, the cavity wall of the connecting cavity is provided with screw threads, and the pressure head is connected to the pressure mechanism of the polishing equipment through the screw threads.

8. A novel lens polishing indenter according to claim 1, characterized in that: The transition cavity is in circular truncated cone shape, the diameter of the side end of the transition cavity close to the connecting cavity is greater than the diameter of the side end of the transition cavity close to the air hole, and the included angle a5 of the opposite inclined surfaces of the transition cavity is 120°.

9. A novel lens polishing indenter according to claim 1, characterized in that: The groove is arranged corresponding to the lens to be polished, and a polyurethane soft pad is additionally arranged at the bottom of the groove.

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