Luminaire having a light absorbing collar

Details Luminaire having a light absorbing collar Luminaire having a light absorbing collar

1989-07-28

1990-04-03

Dority, Carroll B.

Illumination

Light source and modifier

Including reflector

362304, 362346, 362350, F24V 700

Patent

active

049145576

ABSTRACT:
The luminaire comprises a cup-shaped reflector having facets which are curved continuously and extend from the light emanating aperture of the reflector towards the reflector axis. The facets of the reflector, in planes transverse to the reflector axis, are straight and constitute a regular polygon. The luminaire further comprises a circumferential light-absorbing collar which has a portion which narrows from the reflector edge in a stepwise manner. The luminaire together with an axially accommodated light source provides a wide, homogeneous, sharply bounded beam and at small angles with the axis. It is no longer observable as a source of light.

REFERENCES:
patent: 1210039 (1916-12-01), Brennecke
patent: 4545000 (1985-10-01), Fraley et al.
patent: 4855886 (1989-08-01), Eijkelenboom et al.

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