公开(公告)号：US3639768A

公开(公告)日：1972-02-01

申请号：US3639768D

申请日：1968-10-09

Applicant: CORNING GLASS WORKS

Inventor： MANCINI RONALD A

IPC: G01J1/30 ,  G08B13/183 ,  H03F3/08 ,  G01J1/32 ,  G01J1/36 ,  H05B37/02

CPC classification number: G01J1/4204 ,  G01J1/30 ,  G08B13/183 ,  H03F3/08

Abstract: A system for detecting the presence of an object passing between a photosensitive resistance and a light source. A DC feedback amplifier connected to the photosensitive resistance controls the intensity of the light source so that the system functions properly under wide variations in ambient conditions without requiring operator adjustments.

Abstract translation: 一种用于检测通过光敏电阻和光源之间的物体的存在的系统。 连接到光敏电阻的DC反馈放大器控制光源的强度，使得系统在环境条件的宽变化下正常工作，而不需要操作者调整。