Technology for machining two surfaces of infrared window piece

Abstract

The invention relates to a technology for machining two surfaces of an infrared window piece, which performs the grinding with a two-surfaces grinding machine and performs the polishing with the two-surfaces grinding machine, wherein the grinding is firstly performed and the polishing is sequentially preformed. The technology comprises the following steps of: putting an infrared window piece in a loose pulley; primarily grinding on an iron-cast flat mould; fine grinding after the infrared window piece is detected to achieve the quality requirement, wherein the fine grinding is performed by a special flat disc; grinding with refined grinding materials, wherein the position is continually changed during grinding; putting the fine grinded infrared window piece on a polyurethane polishing disc to coarsely polish, so that the surface of the infrared window piece achieves the required precision; and fine polishing the eligible infrared window piece after coarse polishing with a polishing disc which is made from synthetic material of asphalt and rosin to guarantee the quality of the machined product through fine correction. The technology can improve the quality of the smooth finish of the infrared window piece, can improve the quality of the parallelism degree thereof, and can improve the machining efficiency thereof.

Description

technical field

[0001] The invention relates to an infrared window used in the semiconductor industry and infrared optical instruments, in particular to a double-sided processing technology of the infrared window. Background technique

[0002] Germanium, silicon, and zinc selenide are several special materials that transmit infrared light, which are mainly used in the semiconductor industry and various infrared optical instruments, such as: various infrared thermometers, various infrared thermal imagers, night vision devices and high-power carbon dioxide lasers. Widely used in high-end technology, national defense, aviation and other fields, it plays an extremely important role.

[0003] If the customer needs a double-flat lens, according to the previous polishing process, we need to polish it twice, that is, the front side is polished and then the back side is polished. Production according to such a method is not only inefficient, but also easily damages the side that ha...