Length measuring endoscope

Abstract

Abstract PURPOSE:To make high-precision focusing and length measurement possible, by switching the eyepiece lens to an eyepiece lens having a shallow focal depth in the length measuring endoscope where the length of an index is changed in accordance with focusing to measure the length. CONSTITUTION:A vivid image is formed on a focusing screen 61; and when a knob 67 is rotated to magnify and observe this image through an eyepiece lens system 62, an eyepiece lens frame 52 is moved back and forth, and the length of a slit provided in a visual field mask 64 is changed to measure the length. In case that the length of an object is measured with high precision, a grip part 53 is rotated at 180 deg. to adjust the device so that the image of the object focused on the focusing screen 64 is observed most vividly. In this case, a high-precision focusing is possible because an eyepiece lens system 51 having a shallow focal depth is used. The grip part 53 is rotated at 180 deg. as it is to measure the length with a high precision.

Inventors

• 👤 Kazumasa Matsuo
• 👤 松尾　和正

Bibliographic Details