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Grinding method and device for optic lens

A technology for optical lenses and grinding devices, which is applied in the field of optical lenses, can solve the problems of expensive equipment, inability to process, and low processing efficiency, and achieve the effects of simple processing methods and devices, effective grinding, and low production costs

Inactive Publication Date: 2005-10-19
SHANGHAI NEXTREND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of an aspheric lens is a high-degree curved surface, usually with only one axis of symmetry, and the radii of curvature of each part of the curved surface are not equal, so it cannot be processed by the "opposite grinding" method like a spherical lens.
At present, although there are some processing methods for aspheric lenses, such as sample grinding method, profiling grinding method, molding method, etc., these processing methods are either too low in processing efficiency, or the processing equipment is too expensive to form a non-spherical lens. Due to the industrialized production and processing of spherical lenses, high-precision aspheric optical lenses have not been widely used so far

Method used

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  • Grinding method and device for optic lens
  • Grinding method and device for optic lens
  • Grinding method and device for optic lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, it is a vertical grinding device, which includes a disc-shaped grinding disc 2, a frame 9, and a circumferential forming groove 1 on the upper surface of the grinding disc. The cross-sectional contour of the forming groove can be parabolic or other A high-order curve with a symmetrical axis. The forming groove can be made of cast iron or copper, which is suitable for grinding. It can also be made of asphalt for lens polishing (superfine grinding). There are strips or mesh lines in the groove. , to enhance the grinding ability, the lower end of the grinding disc is connected with a rotary drive device 3, a clamp 4 is installed on the upper side of the grinding disc, the front end of the clamp is fixed with the processed lens 10, and the rear end of the clamp is connected with a rotary feeding device 5 It is connected and the rotation axis of the rotary feeding device coincides with the centerline (symmetry axis) of the contour of the forming gr...

Embodiment 2

[0019] Such as figure 2 As shown, it is a horizontal grinding device, the axis of the grinding disc 2 is installed horizontally, and a circumferential forming groove 1 is provided on the outer periphery of the grinding disc. The device 3 is connected to each other to drive the grinding disc to rotate. A clamp 4 is installed on the frame 9 on the outer peripheral side of the grinding disc. ) coincides with each other, on the other side of the outer periphery of the grinding disc, there is a grinding tool holder 7, the rear end of the grinding tool holder is connected with an automatic feeding device 8, and a grinding tool 6 is installed on the grinding tool holder, The cutter is sharp-knife-shaped and moves according to a fixed contour track during grinding. The other structures of this embodiment are the same as those of the previous embodiment.

Embodiment 3

[0021] Such as image 3 As shown, it includes a strip-shaped grinding disc 2, and a straight groove-shaped forming groove 1 is set on the grinding disc. The cross-sectional profile of the forming groove can be the entire lens curved surface profile, or a super-semi-curved surface profile. The bottom of the grinding disc is connected with a linear reciprocating drive device 3a is connected, and the jig 4 is installed corresponding to the forming groove above the grinding disc. The jig is connected with the rotary feeding device 5 to drive the jig to rotate. Two rotary jigs can be installed and connected with a turning mechanism. The whole device is installed On the base frame 9.

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Abstract

The present invention relates to optical lens, and is especially the grinding method and device of aspheric lens. After the lens to be ground is fastened onto the fixture, grinding disc with shaping slot in the cross section shape corresponding to the contour of the required lens camber is set, abrasive is poured into the shaping slot, the lens is set into the shaping slot, and the fixture axis is adjusted to coincide with that of the shaping slot, the lens is made to move relative to the grinding disc until the surface contour of the lens coincides with that of the shaping slot to complete the grinding of the lens. The grinding method and device is simple and low in cost and may be used in industrial production.

Description

technical field [0001] The invention relates to a method and a device for grinding an optical lens, especially an aspheric lens. Background technique [0002] The function of optical instruments is to expand the visual ability of the human eye and change the natural direction of light. The optical system is the core part of an optical instrument. It is composed of curved lenses and flat lenses. These lenses and lenses are precision optical parts that must be ground and shaped. The existing grinding method for processing curved lenses is the "counter-grinding" method, which is formed by the high-speed rotation of a (circular) spherical grinding disc and the swinging of the lens around the center. Since the spherical surface has countless symmetry axes, it is used "Dual research" can better complete the task of spherical lens processing. This kind of good processing performance is an important reason why spherical lenses have been widely used for a long time. However, the "r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B13/00
Inventor 刘康
Owner SHANGHAI NEXTREND TECH