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Title: Optical system of viewing-direction changing attachment for endoscopes

Abstract: An optical system of viewing-direction changing attachment for endoscopes comprising a first reflecting means having a reflecting surface for changing the observing direction and a second reflecting means having a reflecting surface for changing the illuminating direction and arranged so that the reflecting surface for changing the illuminating direction comes to a fore position compared with the reflecting surface for changing the observing direction in order to enable to illuminate and observe a wide area being free from ghost image and flare.


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Inventors: Yamashita, Nobuo (Tama, JP)

Application Number: 867498
Filing Date: 1978-01-06
Publication_date: 1980-04-01
Assignee: Olympus Optical Co., Ltd. (Tokyo, JP)
Primary Class(es): 359/367 359/833, 385/118
Other Classes:
US Patent Ref:
3005452Oct, 1961Pitman350/25.
3818902Jun, 1974Kinoshita et al.350/96.

Other Refs:
Primary Examiner: Corbin, John K.
Assistant Examiner: Koren, Matthew W.
Attorney: Cushman, Darby & Cushman