Brightness control for fiber optical lamps

Details Brightness control for fiber optical lamps Brightness control for fiber optical lamps

1978-09-29

1980-11-11

Walsh, Donald P.

Illumination

Revolving

350206, 362283, 362322, F21V 704, G02B 900, F21V 1702

Patent

active

042336503

ABSTRACT:
Disclosed is a brightness control device for use with fiber optical lamps, comprising a diaphragm which is arranged unilaterally in the light beam between the lamp light source and the light entrance area of the fiber optical conductor. The diaphragm comprises a variable size diaphragm which is designed such that the cross-section of the light entrance area of the fiber optical conductor is asymmetrically and unilaterally reduced in order to maintain a constant lamp color temperature and emission characteristic.

REFERENCES:
patent: 3483807 (1969-12-01), Biedermann
patent: 3775606 (1973-11-01), Bazell

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