Illumination unit and method for the operation thereof

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems

Reexamination Certificate

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C250S227110, C362S285000, C362S372000, C359S385000

Reexamination Certificate

active

07427731

ABSTRACT:
An illumination unit comprisinga high-power light source (1),a first optical element (12) for focusing the light emitted from the high-power light source (1),a photometric head (8) for illuminating an object (3) in a predefinable manner,an optical waveguide (2) for transmitting the emitted and focused light to the photometric head (8),a displacement unit (6) for varying the axial distance between the high-power light source (1) with the first optical element (12) and the inlet of the optical waveguide,wherein the cross-sectional surface of the focal point is at least twice as large as the cross-sectional surface of the optical waveguide (2) on the light inlet side, and the intensity of the light coupled into the optical waveguide (2) can be varied by axial displacement of the high-power light source (1).

REFERENCES:
patent: 4678900 (1987-07-01), Nishioka
patent: 5013311 (1991-05-01), Nouri et al.
patent: 5615938 (1997-04-01), Lemke
patent: 6832849 (2004-12-01), Yoneda et al.
patent: 2002/0012502 (2002-01-01), Harry et al.
patent: 2004/0156098 (2004-08-01), Dubois et al.

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