Wide field of view infrared zoom lens assembly having a constant F/number
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 19, 2001
Grant Date -
N/A
app pub date -
Jan 23, 1997
filing date -
Mar 4, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A wide field of view infrared zoom lens assembly (16) having a constant F/Number. The wide field of view infrared lens assembly (16) includes a focusing component (33), a collecting component (37), an aperture stop (46), and a diffracting component (41). The focusing component (33) may include a pair of focusing zoom lenses (34, 36). The collecting component (37) may include a first collecting lens (38) and a second collecting lens (40). The focusing component (33) and the collecting component (37) may be formed from high dispersion, low index material. The aperture stop (46) may be mounted to the first collecting lens (38) to maintain a constant F/Number. The diffracting component (41) may include a diffractive surface to correct color aberrations associated with an infrared waveband. The focusing component (33) and the collecting component (37) cooperate with the diffracting component (41) to focus infrared radiation at an image plane (15) of an infrared detector (18).
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