Konishiroku Photo Industry Co., Ltd.

Hiroshi Ito

Yoshiaki Kimura

Kunio Sakurai

Takashi Nozaki

Recently, there has been the tendency to increasingly use optical machinery and devices which utilize optical parts made of synthetic resin. Since an antireflection coating film for these synthetic resin optical parts is high in adhesive strength and is hard, it is advantageous to use silicon oxide. Particularly, silicon monoxide (SiO) varies in refractive index by varying the evaporation condition, and therefore, it is possible to make use of such properties to produce a multi-layered antireflection coating film from a single evaporation material by varying the evaporation conditions.

Antireflection optical coating

A light interference device comprising a light source having a low degree of spacial coherence, an optical element having a reference surface for interference, an optical system for providing a parallel light bundle, and an optical projection system for projecting interference fringes localized near the interference surface. Said parallel light bundle comes out of the reference surface at an angle .theta. within the range of 0.degree. &lt; .theta. .ltoreq. 30.degree..

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Inagi, Japan

Hiroshi Ito