Masahiko Yatsu

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 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.

Ultra portable LC projector with high-brightness optical system

In order to realize high-brightness and high quality pictures for a ultra portable liquid crystal (LC) projector, a high-collection illumination system comprising a polarization converter, multi lenses, a small-size LC panel with micro lens system and a newly color-optical system has been developed.

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.