The light be transmitted to the code disk, which be changed into the binary data according to the slit of code disk and the light sensor, then it be change into the regular electric signal.

According to the sputtering coating machine from Japan, to ensure the high density of film and substrate, wear resistance, high temperature test, low temperature test for -40℃/500h, cold and hot impact for +85℃—40℃/1h for 500 times, no bad optical properties, no de-film.

1.                     Material：glass/Plastic/Metal

2.                    Standard：0-10/20-40

3. Optical Characteristic：We can provide the any film design according to the requirement of clients.

4.              Concentricity：＜0.03mm

5.         The biggest Size：φ152mm

6.               Slit Precision：1.5±0.3um