Title:
ENDSCOPE OPTICAL SYSTEM
Document Type and Number:
Japanese Patent JPS5569116
Kind Code:
A
Abstract:
PURPOSE: To make possible wider angle by an objective lens of a short back focus with simple constitution by bonding the constitutional elements of the objective lens to the end of an image guide by means of an adhesive agent.
CONSTITUTION: If the convex optical elements whose one side constituting the objective lens 1 of the endscope is plane are bonded to the end face of an optical fiber 4 forming an image guide by using an adhesive agent 3, the back focus of the lens 1 becomes substantially longer owing to the movement of the optical fiber 4 in the optical axis direction of the lens 1. Hence, the field of view may be widened by the use of the objective lens of a short back focus with the simple constitution.
Inventors:
KISHIKAWA TOSHIROU
HIRAMATSU KENZOU
SUNAGA YASUMASA
HIRAMATSU KENZOU
SUNAGA YASUMASA
Application Number:
JP14203778A
Publication Date:
May 24, 1980
Filing Date:
November 17, 1978
Export Citation:
Assignee:
FUJI PHOTO OPTICAL CO LTD
International Classes:
A61B1/00; G02B23/00; G02B23/26; (IPC1-7): A61B1/00; G02B23/00
Domestic Patent References:
| JP52087180B |