Optical projector for transparencies and opaques
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 27, 1990
Issued Date -
N/A
app pub date -
Mar 21, 1988
filing date -
Mar 21, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical projector having opaque and transparency operating modes employs a pair of illumination paths, conventional overhead-projection optics, common focus elements, and a large-aperture stage. Oversized objects such as large books or magazines are accommodated by a resilient bottom of a light-constraining hood assembly. A light source is oriented in a manner that eliminates optical or physical interferences between the pair of projection modes. The hood assembly provides novel reflectivity for image intensification in the opaque mode and easy access to the stage for either opaque or transparency projection. Most elements associated with either projection mode can be detached in a unit, leaving solely the remaining mode capability.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully