학술논문
Projection apparatus
Document Type
Patent
Author
Source
Subject
Language
Abstract
A projection apparatus has a strobed light source projecting light through a transparency, the transparency having one or preferably a plurality of narrow slits formed thereon so as to project a light pattern upon an object. The transparency is mounted in a holder which is arranged to be moved across the path of the light source by being mounted in a holder which is driven by a cam. The light source is arranged to be pulsed on when the holder is on a dwell point of the cam. If the transparency has a plurality of slits therein simultaneous display of multiple profiles on an object is performed to provide a large number of profiles in a minimal time span. In the disclosure, two different manners of driving the transparency in the holder are given.