| 摘要 |
PURPOSE:To find the size of an object even after photographing, by providing a means which has the length in the visual field changed to give a reference length in accordance with backward and forward movement of an eyepiece lens system for focusing and displays this reference length. CONSTITUTION:A knob 35 is turned for the purpose of magnifying and observing a vivid optical image on a focusing screen 32, which is formed through a line guide 23 and a transmitting means 28 of an insertion part 22 of an endoscope 21, through an eyepiece lens system 26. Pins 38 and 39 are moved, and an eyepiece lens frame 31 engaged with the pin 39 is moved backward and forward, and a rotary ring 34 engaged with the pin 38 is rotated, and a mask relief part 45 is rotated also. The length of a slit 43 is changed in accordance with the turning position of the mask relief part 45, and a measure 44 is observed. Since the length of the slit as the reference is displayed shorter or longer in accordance with backward and forward movement of the eyepiece lens system 26, the size of an object is found even after photographing on a basis of a taken picture or the like. |
