Masaharu Deguchi

Microlens design using simulation program for CCD image sensor

The microlens array has been introduced into the charge coupled device (CCD) image sensor to compensate for the low sensitivity level of the sensor. To realize a higher density image sensor, the authors have introduced additional degrees of freedom into the surface profile of the microlens. As a result, they have obtained a high-efficiency microlens which can realize a high-sensitivity level in the sensor. The new simulation program for microlens design is also described. >

Ultra portable LCOS projector with high-performance optical system

In order to realize high-brightness and high-quality pictures for an ultra portable LCOS (liquid crystal on silicon) projector, a high-performance optical system comprising an illumination system with PCU (polarization converter unit), a new color-management unit with a polarized system and a small-size LCOS panel has been developed.

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. >

Compact LC Projector With High-brightness Optical System

In order to realize a high-brightness compact liquid crystal (LC) projector, a high-collection illumination system comprising combinational reflectors, a polarization converter, and a high efficiency multi-lens has been developed.

Zoom lens design using gradient-index lenses

A zoom lens system using gradient-index lenses was studied to realize a compact video camera. This study investigates the relationship between the total index change and the amount of aberration correction in order to effectively apply existing gradient-index lenses to the zoom lenses. In addition, it examines how the effective dispersion of the gradient affects the chromatic aberrations while zooming. A zoom lens system consisting of a reduced number of lens elements using axial and radial gradient-index lenses is presented that can match the optical performance of a homogeneous lens system.

Zoom lens with aspherical lens for camcorder

T types of zoan lens with aspherical surfaces for camcorder has been succssfu11y design1 . The first type has single aspherical glass lens , axx realizes sizeruction of 30% than cxxiventicxal zocxn lens. Ar the secori type consists of light-weight plastic lenses with aspherical surface in order to ru weight of zoan lens.

High efficiency optical system design for a liquid crystal projector

This paper presents a high efficiency optical system for a liquid crystal projector. The F number of the illumination system with or without a micro lens array on LCD panels, and color separation system has been optimized and the system provides a bright and high quality image.

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

ZOOM LENS WITH ASPHERICAL PLASTIC LENSES FOR VIDEO CAMERA

In order to realize a compact and light-weight zoom lens for video camera, we have applied the aspherical plastic lens technology. In this design, we found the methods, elimination of the lens group, and replacement from a glass lens to a aspherical plastic lens.