Agency of Industrial Science and Technology

Isao Kondoh

Makoto Kinoshita

Saburo Kose

Hiroshi Yamashita

Naoyuki Kitamura

Kenichi Kinugawa

Kohei Fukumi

Jun Matsuoka

Nobuyuki Tamari

Nakoto Kinoshita

A process for producing a glass having a rod refractive index distribution, which includes pressing a glass at a temperature below the glass transition temperature to form a glass having a density increased towards the surface layer thereof, or alternatively includes heating a glass at a temperature around the transition temperature at the lowest to prepare glass having a uniformly enhanced density and heating the treated glass under a pressure lower than the applied pressure at a temperature below the glass transition temperature of the glass to prepare a rod glass having a density increased towards the central portion.

Glass having refractive index distribution

A process for producing a rod glass having a refractive index distribution, which includes pressing a glass at a temperature below the glass transition temperature to form a glass having a density increased towards the surface layer thereof, or alternatively includes heating a glass at a temperature around the transition temperature at the lowest to prepare glass having a uniformly enhanced density and heating the treated glass under a pressure lower than the applied pressure at a temperature below the glass transition temperature of the glass to prepare a glass having a density increased towards the central portion.

Process for producing rod glass having refractive index distribution

A ceramic implant material is disclosed, which comprises a porous zirconia or silicon nitride ceramic containing silicon carbide whiskers, the pores of which are filled with a material adapted to the tissue.

Ceramic implant materials

Growing community of inventors

Ikeda, Japan

Isao Kondoh