Ricoh Company, Ltd.

Masaaki Ishiyama

Hitoshi Nakamura

Wasaburo Ohta

Seiichi Katoh

Isao Miyamoto

Koichi Ohtaka

Masashi Nakazawa

Takeshi Nanjo

Akihiro Yamakage

Michiaki Shinozuka

Toshihiko Yoshio

Yuuzi Onodera

An optical system is disclosed, including: an optical deflecting array including a plurality of optical deflecting devices arranged in a two-dimensional array, each of optical deflecting devices displacing a member having an optical reflection area and deflecting light, so that an incoming light flux entering the optical reflection area is deflected to a reflection direction being changed, a light source illuminating the optical deflecting array, and a projection lens projecting reflected light from the optical deflecting array based on color information. Each of the optical deflecting devices deflects light to two-axis directions, incoming light fluxes having different colors enter each of the optical deflecting devices from two directions respectively corresponding to two deflection axes, and are reflected by each of the optical deflecting devices based on the color information; and each of reflected light fluxes is led to the projection lens for a respective arbitrary time.

Optical system, color information displaying method, optical deflecting device, and image projection displaying apparatus

An optical information recording medium is composed of a transparent substrate, a recording layer provided on the substrate, which is transparent with respect to a light beam for reproducing information recorded in the recording layer, a reflection layer provided on the recording layer, and an anti-reflection layer provided on the back side of the substrate opposite to the recording layer. The anti-reflection layer is composed of a plurality of overlaid layers, and at least one of the layers being a transparent electroconductive layer and the other layers are transparent insulating layers.

Optical information recording medium having multi-layered structures for

Growing community of inventors

Iwate, Japan

Masaaki Ishiyama