Projection zoom lens system and projector apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Nov 14, 2000
Grant Date -
N/A
app pub date -
Jul 28, 1999
filing date -
Jul 28, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A projection zoom lens system of the present invention for projecting image onto a screen from a light modulator such as a DMD includes a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged in this order from the screen side. An outer diameter LD of the last lens and a back focus at the wide-angle end Bfw of the projection zoom lens system satisfy the condition below. 0.3
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