Fuji Electric Co., Ltd.

Fuji Electric Corporate Research and Developement Ltd.

Fuji Electric Corporate Res. & Dev. Ltd.

Hakubun Fujisawa

Masaharu Nishiura

Katsumi Yamada

Hiromu Haruki

Yoshiyuki Uchida

A rotational angle detecting device includes a rotatable plate attached to a shaft of a rotatable motor having a plurality of windows located at a first angular pitch and at a selected circumference with respect to the shaft, a light source, a stationary plate including first and second photoelectric detecting elements at a second pitch and the selected circumference, and electrical conductors connecting the first detecting elements in parallel and the second detecting elements in parallel such that the sum of the electrical signals produced by the photoelectric detecting elements are used to generate digital signals describing the rotational movement of the shaft with respect to the stationary plate.

Rotational angle detecting device with full circumference illumination

A pattern detector comprises a plurality of photoelectric converter elements having thin film semiconductors disposed adjacently in a line in one plane. The converter elements are shaped that they overlap one another by a predetermined length when viewed in a direction perpendicular to a direction in which the converter elements are disposed. The photoelectric converter elements may be disposed in a plurality of parallel arrays, staggered so that the center of one element in one array is opposed to a space between neighboring elements of the other array.

Pattern detector

Growing community of inventors

Kanagawa, Japan

Hakubun Fujisawa