Illumination – Light source and modifier – Including reflector
Reexamination Certificate
1998-03-30
2001-01-23
Sember, Thomas M. (Department: 2875)
Illumination
Light source and modifier
Including reflector
C362S346000, C362S804000
Reexamination Certificate
active
06176597
ABSTRACT:
BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates to a surgical light apparatus, and particularly, to a reflector for a surgical light apparatus. More particularly, the present invention relates to a surgical light reflector having a concave reflector surface for reflecting light onto a surgical site.
Surgical lights used in hospital operating rooms to illuminate surgical sites on patients are known. Many surgical lights are suspended from a ceiling of a hospital room by arm mechanisms which are movable to permit adjustment of the location of the surgical light relative to the patient. It is common for surgical lights to be placed in a position behind a surgeon such that the surgeon's head is located between the surgical light and the surgical site. Surgical lights having a dome-shaped reflector to reflect light toward the surgical site around the head of the surgeon are known. It is desirable for surgical lights to provide a high illuminance level, to shine light deeply into a patient's body cavity, and to resist shadowing caused by interference from personnel and instruments.
According to the present invention, a surgical lighthead includes a light source having a reference point defined thereon and a reflector including a concave reflector surface which has a central axis. The concave reflector surface is formed to include a plurality of facets configured to reflect light emanating from the light source. Each facet extends between an associated pair of longitudinal boundary lines and an associated pair of latitudinal boundary lines. The plurality of facets includes a first set of facets for which each associated longitudinal boundary line is angularly spaced by a first angle from each of the next adjacent boundary lines relative to the central axis. In addition, the plurality of facets includes a second set of facets for which each associated longitudinal boundary line is angularly spaced by a second angle from each of the next adjacent boundary lines relative to the central axis.
In preferred embodiments, the first latitudinal boundary lines are angularly spaced relative to the reference point by a different amount than the second latitudinal boundary lines are angularly spaced relative to the reference point. The first set of facets are arranged so as to contribute primarily to shadow reduction performance of the surgical lighthead and the second set of facets are arranged to contribute primarily to pattern size performance of the surgical lighthead.
Additional features and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following detailed description of preferred embodiments exemplifying the best mode of carrying out the invention as presently perceived.
REFERENCES:
patent: 2114664 (1938-04-01), Gelb
patent: 2173325 (1939-09-01), Alexander
patent: 2297781 (1942-10-01), Korengold
patent: 3511983 (1970-05-01), Dorman
patent: 3662165 (1972-05-01), Osteen et al.
patent: 3666939 (1972-05-01), Ota
patent: 3700883 (1972-10-01), Donohue et al.
patent: 3702928 (1972-11-01), Alger
patent: 3826913 (1974-07-01), Downing et al.
patent: 3928757 (1975-12-01), Nelson
patent: 4021659 (1977-05-01), Wiley
patent: 4037096 (1977-07-01), Brendgord et al.
patent: 4149227 (1979-04-01), Dorman
patent: 4153929 (1979-05-01), Laudenschlarger et al.
patent: 4234247 (1980-11-01), Dorman
patent: 4242727 (1980-12-01), de Vos et al.
patent: 4254455 (1981-03-01), Neal, Jr.
patent: 4288844 (1981-09-01), Fisher et al.
patent: 4617619 (1986-10-01), Gehly
patent: 4799136 (1989-01-01), Molnar
patent: 4837668 (1989-06-01), Koehler
patent: 4855886 (1989-08-01), Eijkelenboom et al.
patent: 4937715 (1990-06-01), O'Shea et al.
patent: 4994945 (1991-02-01), O'Shea et al.
patent: 5001616 (1991-03-01), Gehly et al.
patent: 5037191 (1991-08-01), Cheng
patent: 5038254 (1991-08-01), Fabbri et al.
patent: 5093769 (1992-03-01), Luntsford
patent: 5165786 (1992-11-01), Hubert
patent: 5178452 (1993-01-01), Scholz
patent: 5199785 (1993-04-01), Scholz
patent: 5235470 (1993-08-01), Cheng
patent: 5295052 (1994-03-01), Chin et al.
patent: 5331530 (1994-07-01), Scholz
patent: 5347431 (1994-09-01), Blackwell et al.
patent: 5383105 (1995-01-01), Agut
patent: 5483430 (1996-01-01), Stapel et al.
patent: 5485319 (1996-01-01), Lemons
patent: 5539626 (1996-07-01), Scholz
patent: 5544030 (1996-08-01), Wijbenga
patent: 5568967 (1996-10-01), Sikkens et al.
patent: 35 06 030 (1986-08-01), None
patent: 4140 325 (1993-05-01), None
patent: 0 091 797 (1983-10-01), None
patent: 0 774 619 A1 (1997-05-01), None
patent: 877546 (1961-09-01), None
patent: 927676 (1963-05-01), None
Berchtold Corporation, “Chromophare® C-571 Superior lighting technology is the secret of our success”, Feb. 1995, 8 pages.
Berchtold Corporation, Chromophare® C-570 Service Manual, date unknown, 20 pages.
Barnes & Thornburg
Hill-Rom Inc.
Sember Thomas M.
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