Fuji Photo Optical Co., Ltd.

Nobuyuki Miura

Kazuhiro Sakamoto

Joji Watanabe

Hiroshi Kuboya

Tadasu Kobayashi

Shuichi Yamataka

An optical lens assembly containing a plural number of lens elements for an optical system to be incorporated into a tip end portion of an endoscopic insertion instrument. Of a plural number of lenses which constitute an optical system, a metal film layer is formed on confronting outer peripheral surface portions of at least two adjacently located lenses, outside respective effective lens areas, and the two adjacently located lenses are assembled and fixedly bonded together by applying solder to the outer peripheral surface portions with a metal film layer.

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Tochigi, Japan

Nobuyuki Miura