Diaphragm apparatus of lens for CCTV camera
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 12, 2008
Grant Date -
Jan 10, 2002
app pub date -
Jul 19, 2001
filing date -
Aug 7, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A diaphragm apparatus of a lens for a CCTV camera includes a diaphragm blade which opens and closes a stop aperture of the diaphragm apparatus; and an ND filter which is attached to the diaphragm blade, the ND filter having a spectral transmittance so that the transmittance of infrared radiation therethrough is substantially identical to, or less than, the transmittance of visible light therethrough, or alternatively, the ND filter having a spectral transmittance which cuts out infrared radiation. The ND filter covers the stop aperture when the diaphragm blade is moved to open the aperture.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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