Matsushita Electric Industrial Co., Ltd.

Takaaki Tomita

Seiji Nishiwaki

Shinji Uchida

Yoshinao Taketomi

Junichi Asada

Sadao Mizuno

Taketoshi Yonezawa

Masayuki Hino

A movable filter device comprises a rotary plate for holding an optical filter, a holding plate for holding the rotary plate rotatably at a pivot point, stopper pins, and a torsion coil spring. The torsion coil spring has one end coupled to the holding plate and the other end coupled to the rotary plate, and generates a force for extending both ends thereof. The force generated by the torsion coil spring prevents the rotary plate from stopping at positions other than those defined by the stopper pins. The rotary plate has slender portions of low rigidity for absorbing the impact of collision between the rotary plate and stopper pins.

Movable filter device

Optical head apparatus including a waveguide layer with concentric or

Light deflecting device

Optical head apparatus including concentric, periodic grating in a

Growing community of inventors

Moriguchi, Japan

Takaaki Tomita