Device for adjusting light intensity for discharge lamp...

Details Device for adjusting light intensity for discharge lamp... Device for adjusting light intensity for discharge lamp...

2008-01-29

2008-01-29

Koval, Melissa Jan (Department: 2862)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C353S098000, C353S101000, C353S102000, C349S067000, C362S281000, C362S328000

Reexamination Certificate

active

07322706

ABSTRACT:
The invention relates to a device for adjusting light intensity for discharge lamp projectors with an optical assembly that contains a spherical mirror and a discharge lamp, and a Fresnel lens provided in front of the lamp of the optical assembly. The device is characterized in that an iris diaphragm (5) is provided on the optical assembly, in front of the lamp, in correspondence with the focus of the optical assembly.

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patent: 2005/0168995 (2005-08-01), Kittelmann et al.
patent: 0 402 845 (1990-12-01), None

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