Adjustable photography light that maintains constant color tempe

Details Adjustable photography light that maintains constant color tempe Adjustable photography light that maintains constant color tempe

1991-07-15

1992-11-24

Cole, Richard R.

Illumination

Modifier mountable on light source envelope

362298, 362351, F21V 116

Patent

active

051657848

ABSTRACT:
An adjustable photography light including a light bulb having a ceramic layer coated over 180.degree. of its surface, which ceramic has the same expansion coefficient as the light bulb, and which acts alternatively as a white reflector or as a mask as the bulb is rotated.

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patent: 4186431 (1980-01-01), Engel et al.
patent: 4727457 (1988-02-01), Thillays
patent: 4914435 (1990-04-01), Gould et al.
patent: 4989126 (1991-01-01), Preuss

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