Hisao Inage

Development of high-brightness compact LC projector

In order to realize a high-brightness compact liquid crystal projector, a high-collection illumination system comprising combinational reflectors with a high power short arc metal halide lamp and a high-efficient cooling system have been developed. >

A Zoom Lens System with New Infrared Autofocus Mechanism

In order to realize a compact and high-performance video camera, solid-state-imager,(1) auto-white-balance and auto-focus-mechanism (2) have been developed. As a result of these efforts, almost consumer video camera have come to install these functions.

Laser scanning optical system with plastic lenses featuring high resolution

ABSTRACT A scanning optical system employing plastic lenses was studied in order to realize a high resolution laser scanningoptical system with simple construction.A simulation program was developed to analyze the effect of lens surface error which was a problem with plastic lenses.As a result we confirmed suitable lens disposition which would make possible a high resolution optical scanning systemwhen employing current high precision plastic lens production engineering. Including this result, compensation of focusshift and correction of aberration were studied. Consequently, the optical scanning system with simple construction wasdesigned, and a small and uniform scanning spot was achieved in our prototype of the optical system. 1 . INTRODUCTION The demand is growing for a printing equipment capable of high definition printing like a photograph. As a responseto this demand there is a high resolution laser printer. Laser printers are quiet, high speed and besides producing high quality printing, such that a high resolution of 600—1200 dpi is possible. If the high resolution laser printer can be