Illumination – Light source and modifier – Including selected wavelength modifier
Patent
1992-12-02
1994-07-19
Cole, Richard R.
Illumination
Light source and modifier
Including selected wavelength modifier
362298, 362302, 362346, 362804, F21V 700
Patent
active
053315308
ABSTRACT:
An operating theatre lamp comprises a housing provided at the bottom with a light outlet opening (12) and in which a light source (13) is centrally arranged. The light source emits light all around toward a main ring concave reflector (14) which is mounted in the housing and deflects the incident light rays towards the light outlet opening (12) and concentrates them on a site of operation (15). At least one auxiliary ring reflector (17, 18) is provided between the light source (13) and the main reflector (14) outside of the light rays extending from the light source (13) toward the main reflector (14) which receives the light rays which would normally pass at the side of the main reflector (14) and deflects them toward locations of the main reflector (14) at which they are deflected toward the site of operation. In accordance with the invention, the auxiliary reflectors (17, 18) arranged above and below the light rays (16) deflect the incoming light from the light source (13) substantially back toward the light source (13) or past the latter to the diametrically oppositely lying region of the main reflector (14) on the opposite side of the light source (13).
REFERENCES:
patent: 950600 (1910-03-01), Perry
patent: 1822076 (1931-09-01), Bauersfeld
patent: 2173325 (1939-09-01), Alexander
patent: 4395750 (1983-07-01), Scheidemann et al.
patent: 4937714 (1990-06-01), Witt
patent: 5178452 (1993-01-01), Scholz
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