OPTICAL SENSOR AND METHOD OF ITS MANUFACTURE.

摘要

A position measuring element (4) is fabricated by forming a film (5) facing to the direction (X), a photoconductive film (6), and a resistor film (7) in the direction (Y) on one side of a transparent glass plate (2). A light shielding film (3) is formed on the other side of the glass plate (2). A pin hole (31) is made in the center of the film to pass light through it. In such a way, the position measuring element (4) and the light shielding film (3) are integrally formed on the glass plate (2). Then, both the position measuring element (4) and the light shielding film (3) are mounted on the case of a sensor when the glass plate (2) is attached to the sensor case. Hence the assembling work of the position measuring element (4) and the light shielding film (3) together with the housing is facilitated.