Cold-machining technology for high-precision optical lenses

A technology of optical lens and processing technology, which is applied in the direction of metal processing equipment, optical surface grinder, manufacturing tools, etc., can solve the problems of slow processing speed and unsatisfactory precision of high-precision optical lens in classical processing methods, so as to ensure the quality of lens processing, The effect of shortening the process flow and saving costs

Inactive Publication Date: 2016-08-10
THE OPTICAL ELEMENT FACTORY OF THE INST OF OPTICS & ELECTRONICS THE CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the high-speed fine grinding and polishing processing method in the prior art that the precision of the high-speed fine grinding and polishing processing method does not meet the requirements of the high-precision optical lens and the slow processing speed of the classical processing method, and provide a new high-precision optical lens. High-precision optical lens processing technology, the processing technology of the present invention belongs to the cold processing technology, which can be carried out in a conventional environment, more precisely, it can be processed at an ambient temperature of 25-30°C

Method used

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  • Cold-machining technology for high-precision optical lenses
  • Cold-machining technology for high-precision optical lenses
  • Cold-machining technology for high-precision optical lenses

Examples

Experimental program
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Embodiment 1

[0069] according to figure 1 The process flow shown is to process large-diameter optical lenses, cut quartz raw materials into squares, rough grind to modify the thickness, fine roll the outer circle, mill the radius, control the milling amount, adjust the radius of the lens, and control the surface shape and center at the same time Thickness, get lens base material. The outer circle of this basic material is fine-rolled to the size required by the drawing, and the error is controlled within the required tolerance. Use the equal thickness seat to modify the equal thickness dimension of the lens, control the equal thickness difference <0.005mm, and ensure the optical decentering C value. After modification, put it into the grinding jig, glue the diamond pellets on the grinding mold plate, and use the high-speed horizontal pendulum fine grinder to perform primary grinding and secondary grinding on the lens. In the process of grinding, control the primary surface defects, contr...

Embodiment 2

[0074] according to figure 1The process flow shown is to process small and medium-diameter optical lenses, cut the raw materials into basic square materials, rough grind to modify the thickness, rough roll the outer circle, mill the radius, control the milling amount, adjust the radius of the lens, and control the surface shape at the same time and center thickness to obtain the lens base material. Then, put the lens material into the jig for grinding and fix it, bond the diamond pellets on the grinding die plate, and use the swing fine grinder to grind the lens. In the process of grinding, control the primary surface defects, control the thickness of the center, and control the surface shape. Then, glue a polyurethane sheet on the polishing mold plate, clean the ground lens, put it into a polishing fixture, and fix it for pre-polishing. After the pre-polishing is completed, the lens is glued to the high-speed polishing mold, and the transition joint is first installed on th...

Embodiment 3

[0076] Take the reworked optical lens, put it into the polishing fixture to fix it, and then grind it on the high-speed fine grinding machine on the mold bonded with diamond pellets. After the preliminary grinding is completed, it is reworked and polished on a high-speed fine grinder, and is also directly clamped with a fixture, and the initial polishing is performed on a mold bonded with a polyurethane sheet. Then repair the aperture, and manually polish the repair ring with a polishing die to meet the requirements. Control the surface finish and aperture of the optical lens to meet the requirements.

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Abstract

The invention discloses a cold-machining technology for high-precision optical lenses. The cold-machining technology for high-precision optical lenses includes the following steps that S1, blanking and rough grinding are conducted, specifically, a material is cut into a square, the thickness is modified, and the outer ring is subjected to rough grinding; S2, the outer ring is subjected to precise hobbing, specifically, the outer ring is subjected to precise hobbing till meeting the requirement of a drawing, the radius portion is subjected to milling and grinding, and the face form and center thickness are controlled; S3, precise grinding is conducted, specifically, the lens material is placed in a grinding clamp and is grinded on a high-speed horizontally-swinging fine grinder through a diamond pellet; S4, pre-polishing is conducted, specifically, the lens is subjected to pre-polishing on a high-speed horizontally-swinging polishing machine through a polyurethane chip; and S5, precise polishing is conducted, specifically, the workpiece is subjected to precise polishing, aperture modification and detection on a low-speed polishing machine so that the lens can meet the requirements for the center thickness, surface form and degree of roughness finally. The process of the cold-machining technology for high-precision optical lenses is designed for high-precision optical lenses, and the high-speed fine grinder, the high-speed polishing machine and the low-speed polishing machine are combined for machining. The optical lens obtained through machining has the characteristics of being few in surface defect, high in degree of finish, good in surface form and low in degree of surface roughness.

Description

technical field [0001] The invention relates to an optical lens processing technology, in particular to a high-precision optical lens cold processing technology, which belongs to the field of optical equipment processing and preparation. Background technique [0002] The optical lens is the most basic unit of the optical system. It is an optical element made of a transparent material with a spherical or aspherical surface. Light is refracted and reflected on the surface to form an image. Transmission materials are divided into three categories: optical glass, optical crystal and optical plastic, among which optical glass is the most commonly used optical material. In recent years, with the widespread use of optical instruments, the demand for optical components has gradually increased, especially the demand for high-precision optical lenses has grown linearly. [0003] For high-precision optical lenses, the requirements for the properties of optical lenses are extremely hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B13/00
CPCB24B13/00
Inventor 徐丽
Owner THE OPTICAL ELEMENT FACTORY OF THE INST OF OPTICS & ELECTRONICS THE CHINESE ACADEMY OF SCI
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