Kabushiki Kaisha Toshiba

Nippon Soda Co., Ltd.

Yooji Yuge

Akira Kawakatsu

Tokuyoshi Saito

Toshio Karino

Ariyoshi Ishizaki

Noriyuki Hayama

Umio Maeda

Takeshi Ishii

A light diffusive coating having an excellent light diffusion effect, a method of forming the coating and a halogen lamp with the coating. The light diffusive coating includes bubbles with a continuous coating consisting of a metal oxide formed on a base. The method of forming the light diffusive coating is made by the inclusion of bubbles formed by the evaporization of a high boiling-point organic solvent within the metal oxide coating formed by the application of a combination of an organo-metallic compound with a high boiling-point organic solvent to a base surface, and the subsequent decomposition of the organo-metallic compound on baking. The halogen lamp has a porous light diffusive coating formed on the coating established on the surface of the outer vessel which allows visible light to pass through but reflects infra-red light, so that strain, caused by the difference in thermal expansion efficient of the structural material of the outer vessel and the structural material of the light diffusive layer occuring when the outer vessel is at a high temperature, is absorbed by the porous structure, and prevents peeling.

Light diffusive coating, a method of forming the coating and a lamp

A light diffusive coating having an excellent light diffusion effect, a method of forming the coating and a halogen lamp with the coating. The light diffusive coating includes bubbles within a continuous coating consisting of a metal oxide formed on a base. The method of forming the light diffusive coating is made by the inclusion of bubbles formed by the evaporization of a high boiling-point organic solvent within the metal oxide coating formed by the application of a combination of an organo-metallic compound with a high boiling-point organic solvent to a base surface, and the subsequent decomposition of the organo-metallic compound on baking. The halogen lamp has a porous light diffusive coating formed on the coating established on the surface of the outer vessel which allows visible light to pass through but reflects infra-red light, so that strain, caused by the difference in thermal expansion efficient of the structural material of the outer vessel and the structural material of the light diffusive layer occuring when the outer vessel is at a high temperature, is absorbed by the porous structure, and prevents peeling.

Light diffusive coating and a lamp having the coating

A lamp includes a glass bulb sealing a filament therein. A light interference film is formed on a surface of the bulb. The film has at least five layers and is formed by alternately stacking a low-refractive index layer comprising silicon oxide and a high-refractive index layer having a refractive index higher than said low-refractive index layer. The low-refractive index layer contains, at least one additive selected from the group consisting of phosphorus and boron.

Lamp having interference film

There is proposed a bulb which is coated with an optical interference film consisting of alternately formed thin titanium oxide layers and metal oxide layers of a lower refractive index than that of titanium oxide layers. The characteristics of the bulb reside in the formation of each titanium oxide layer which is formed by thermal decomposition of a mixture consisting of 5 to 50 parts by weight of Ti(OR).sub.4 and 95 to 50 parts by weight of polymerized Ti(OR).sub.4, where R are C.sub.1 to C.sub.18 alkyl group, --OCOR' (R' is C.sub.1 to C.sub.18 alkyl group or --X radical which is capable of forming a chelate ring with titanium.

Growing community of inventors

Chigasaki, Japan

Yooji Yuge