Method for making gum code disc/code ruler

Abstract

The invention discloses a manufacturing method of colloid a code disk / yardstick, which uses a colloid sheet with the light transmittance of more than 90 percent and the high temperature resistance performance of up to 120 DEG C as the base material; only the colloid sheet with the thickness of less than 0.5nm and the material of PET or PC are preferable for making the code disk / yardstick; the method comprises the following steps: firstly, the surface of the sheet is plated with a layer of membrane with the material of chromium and aluminium and the thickness of about below 1Mum in an evaporation way; and a photoresist is coated on the membrane with the material of chromium and aluminium so as to form a layer of photoresist membrane with the thickness of about 1 to 3Mum; then the Fehling mother matrix of a grating pattern of the code disk / yardstick, which is drawn by a photoplotter, is covered on the photoresist membrane which is caused to sense light by the exposure irradiation of parallel lights; afterwards, the photoresist membrane which does not sense the light is washed off; steeping sluggish corrosion of about tens of seconds is carried out to the colloid sheet by corrosion liquid, and the part of the photoresist membrane which senses the light is washed off after the corrosion is finished, therefore, the engraving and making of the grating pattern of the code disk / yardstick is finished; and then the grating pattern is placed in an optical punch, and under automatic position punching alignment, the disk-shaped code disk or strip yardstick is formed to be used for an encoder or an optical scale.

Description

technical field [0001] The present invention relates to a kind of manufacturing method of colloidal code wheel / code ruler, especially a kind of colloidal plate with polyester (PET) or polycarbonate (PC) as base material, and utilizes the manufacturing method of the present invention, And make it a code wheel / yardstick (scale) with a grating pattern to be suitable for an encoder or an optical ruler. Background technique [0002] A known code wheel is an industrially used component for encoders and some measurements. The known yardstick (scale) is an application element used in a strip-shaped optical ruler. The code disc or yardstick (scale) has a specific pattern as a grating for encoding. Using the light transmittance of the grating, the light is emitted by the light-emitting element on one side, and then received by the receiving element on the other side. The rotation or movement of the code disc or yardstick (scale) is then decoded and compared to facilitate the applica...

AI Technical Summary

Problems solved by technology

However, in addition to the disadvantage of low temperature resistance, another disadvantage is that there is no choice in its thickness, and the thickness of the existing film factory must be standardized.

[0006] Combining the above three methods and structures, none of them can meet the requirements of high precision, high temperature resistance, and good stability, and also affect the extension and development of the industry. Solve the problems that are easy to occur in the use of known

Images