Diaphragm device for light source light adjustment

Details Diaphragm device for light source light adjustment Diaphragm device for light source light adjustment

2005-12-13

2005-12-13

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C359S814000, C359S738000

Reexamination Certificate

active

06975464

ABSTRACT:
A diaphragm device has a first base plate and a second base plate that are installed with a predetermined interval therebetween and formed into a unit. The diaphragm device is installed to a mounting portion of a lens frame such that the second base plate is disposed adjacently to a light source. The two base plates are partitioned with an intermediate plate to form two accommodating chambers, a stopping-down blade and a covering blade being disposed in each accommodating chamber. A motor is attached to the first base plate to relatively rotate a set of plate members and another set of plate members so as to restrict optical path apertures by the stopping-down blades. Portions directly exposed to light source light are provided with gray or white heat-resistant painting.

REFERENCES:
patent: 4233650 (1980-11-01), Hagner et al.
patent: 6-37400 (1994-09-01), None
patent: 07-099002 (1995-04-01), None
patent: 09-311363 (1997-12-01), None
patent: 2001-174910 (2001-06-01), None
patent: 2002-072361 (2002-03-01), None

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