Polishing mould for optical element and manufacturing method thereof

A technology of optical components and polishing molds, applied in grinding/polishing equipment, optical surface grinders, manufacturing tools, etc., can solve problems such as affecting the processing quality of zinc selenide optical components such as the smoothness, and polishing molds failing to meet high-precision requirements. , to achieve the effect of improving the effect, ensuring the machining accuracy, and improving the machining accuracy

Active Publication Date: 2009-02-18
CHENGDU Z & Z OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness of the polishing asphalt directly determines the hardness of the polishing mold. The polishing mold made of high-hardness polishing asphalt has a higher hardness, which can effectively ensure the smooth surface shape of the optical processing of ZnSe; however, due to the soft material of ZnSe, If an asphalt polishing mold with a hardness that does not match it is used, a large number of polishing scratches will be generated on the surface of ZnSe optical components, which will seriously affect the processing quality of ZnSe optical components such as smoothness.
Therefore, the prior art uses asphalt polishing molds to polish zinc selenide optical components, which has technical defects.
In addition, the bonding agent of the polishing mold used for polishing glass is polyurethane. Polyurethane is added with solid abrasive powder (usually cerium oxide, zirconia) to make composite polishing mold material, but the composite polishing mold material of polyurethane with solid abrasive powder is only suitable. For high-speed polishing of high-hardness materials such as glass
In order to obtain high-precision optical components for soft zinc selenide, the polishing mold made of polyurethane and solid abrasive powder composite polishing mold material cannot meet the high-precision requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, the polishing mold of the first optical element and its preparation method

[0025] The 914CP polished asphalt produced by Global Optical Co., Ltd. of the United States is used, that is, 64# polished asphalt, the softening temperature is 68-80°C, and the particle size of alumina powder is 0.80 microns. The polishing mold of the optical element is 500 parts of polishing pitch and 50 parts of alumina powder by weight.

[0026] The preparation method of the polishing mold of above-mentioned optical element, its preparation steps are as follows:

[0027] (1) Heating and melting polished asphalt: place 64# polished asphalt at room temperature at 68°C to 80°C for 20 minutes, and continue heating at constant temperature for about 10 minutes until the solid polished asphalt is melted into liquid polished asphalt;

[0028] (2) Mixing: Add alumina powder to the liquid polished asphalt at 68°C to 80°C, and stir continuously with a glass rod for about 5 minutes until...

Embodiment 2

[0031] Embodiment 2, the polishing mold of the second optical element and its preparation method

[0032] Use 55# polished asphalt, the softening temperature is 50-65°C, and the particle size of alumina powder is 0.50 microns. The polishing mold of the optical element is 500 parts of polishing pitch and 100 parts of aluminum oxide powder by weight. The preparation method of the polishing mold of the optical element is the same as that in Example 1.

Embodiment 3

[0033] Embodiment 3, the polishing mold of the third optical element and its preparation method

[0034] 73# polished asphalt is used, the softening temperature is 65-80°C, and the particle size of alumina powder is 1.50 microns. The polishing mold of the optical element is 500 parts of polishing pitch and 150 parts of alumina powder by weight. The preparation method of the polishing mold of the optical element is the same as that in Example 1.

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PUM

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Abstract

The invention relates to a polishing mold of an optical element, which belongs to a mold of the optical element which is rubbed and contacted with the surface of a polished substance in the polishing process and a method for preparing the same. The invention in particular relates to a polishing mold of a zinc selenide optical element. The polishing mold consists of 500 portions of polishing asphalt and 20 to 200 portions of alumina powder according to weight percentage; the polishing asphalt is No. 55-No. 82 polishing asphalt; the optimal polishing asphalt is 914CP polishing asphalt, namely No. 64 polishing asphalt, which is produced by American Universal Optical Co., Ltd.; and the granularity of the alumina powder is between 0.50 and 2.00 microns. The method comprises the following preparation steps: the polishing asphalt is heated, melted, evenly mixed, solidified and excavated with a grinding material storage groove. The polishing asphalt provided by the invention can ensure that the finishing degree of the polishing surface of the zinc selenide optical element reaches over 10 / 5 which is obviously higher than the precision requirement of 40 / 20 by US military specification.

Description

technical field [0001] The invention belongs to a consumable material for polishing optical elements and a preparation method, in particular to a polishing mold, in particular to a polishing mold capable of achieving high-precision polishing of zinc selenide optical elements. Background technique [0002] Zinc selenide optical element is a precision optical element used in the field of infrared materials. This kind of precision optical element is especially suitable for cutting-edge technology (such as night vision, homing, navigation, etc.), defense fields (weapons, national security systems, etc. ), laser fields (high-power lasers, etc.), etc. [0003] At present, the domestic processing of zinc selenide optical components mainly adopts the traditional optical component processing technology. Especially in the polishing process, most production units use polishing pitch to make pitch polishing molds (discs) to polish zinc selenide optical components. The hardness of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B13/01
Inventor 陈兴建曾贤高
Owner CHENGDU Z & Z OPTOELECTRONICS TECH
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