Browse Prior Art Database

Transparency Sensor

IP.com Disclosure Number: IPCOM000055761D
Original Publication Date: 1980-Sep-01
Included in the Prior Art Database: 2005-Feb-13

Publishing Venue

IBM

Related People

Authors:
Estabrooks, DC Knappenberger, CW Robinson, JT [+details]

Abstract

The passage of a transparent sheet or substrate through a light path is detected by the pivoting of an opaque shutter.