DOOR SCOPE OBSERVATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a door scope observation device which projects forward and backward to a smaller extent and makes a door scope observable even from a somewhat distant place. SOLUTION: The observation device is provided with a housing 9 having an objective lens 5 of a small diameter to be opposed to an eyepiece 4 of the door scope 3 on a back side and having an observation lens 7 of a large size on a front side. Even number of sheets of reflection mirrors 10 and 11 for bending the rays from the objective lens 5 and sending the rays to the observation lens 7 side are disposed between the objective lens 5 and the observation lens 7 within the housing 9. The center of the objective lens 5 and the center of the reflection mirror 10 facing the objective lens 5 are set below the focal length of the objective lens 5. COPYRIGHT: (C)2003,JPO