Illumination – Photographic lighting – Including specific light modifier
Patent
1998-03-02
2000-02-29
Tso, Laura K.
Illumination
Photographic lighting
Including specific light modifier
316347, G03B 1502
Patent
active
060300868
ABSTRACT:
A combined reflector and arc guide for use with a xenon flash tube comprises a reflector structure having a reflecting surface that is adapted to be placed in a predetermined orientation with respect to the flash tube. An electrically conductive arc guide is carried by, and is preferably integral with, the reflector structure for controlling the arc in the flash tube. The arc guide comprises an elongated ridge that projects outwardly from the reflecting surface of the reflector structure, and extends in a direction substantially parallel to the longitudinal axis of the flash tube. An electrical terminal is carried by the reflector structure and has an electrical connection to the arc guide for allowing an electrical potential to be applied to the arc guide. The reflector structure is preferably made of an electrically conductive plastic material, thereby providing continuity between the electrical terminal and the arc guide without the need for a separate conductor. An area of modified reflectivity, preferably in the form of a plurality of grooves, may be provided in the reflective surface of the reflector structure to spread out the intensity peak of the flash tube. The disclosed reflector is simple and inexpensive to manufacture, and is suited for use in automated hematology systems in which a pulse of light from the flash tube causes dyed blood cell layers in a capillary tube to fluoresce so that a complete blood count can be obtained by optical imaging techniques while the blood sample is being rotated in a centrifuge.
REFERENCES:
patent: 3199775 (1965-08-01), Drucker
patent: 3741011 (1973-06-01), Seybold
patent: 3955890 (1976-05-01), Bessis et al.
patent: 4027660 (1977-06-01), Wardlaw et al.
patent: 4077396 (1978-03-01), Wardlaw et al.
patent: 4082085 (1978-04-01), Wardlaw et al.
patent: 4156570 (1979-05-01), Wardlaw
patent: 4194835 (1980-03-01), Shiode
patent: 4428669 (1984-01-01), Bessis
patent: 4434385 (1984-02-01), Touho et al.
patent: 4479720 (1984-10-01), Mochida et al.
patent: 4555183 (1985-11-01), Thomas
patent: 4558947 (1985-12-01), Wardlaw
patent: 4567754 (1986-02-01), Wardlaw et al.
patent: 4774965 (1988-10-01), Rodriguez et al.
patent: 4823624 (1989-04-01), Rodriguez et al.
patent: 4848917 (1989-07-01), Benin et al.
patent: 5195825 (1993-03-01), Ringrose
patent: 5380087 (1995-01-01), Haber et al.
Stephen C. Wardlaw, MD, et al., "Quantitative Buffy Coat Analysis--A New Laboratory Tool Functioning as a Screening Complete Blood Cell Count", Journal of the American Medical Association, vol. 249, Feb. 4, 1983, pp. 617-620.
Robert L. Sallitt, et al., "Evaluation of Leukocyte Differential Counts on the QBC.RTM. Centrifugal Hematology Analyzer According to NCCLS Standard H20-T", Blood Cells, vol. 11, 1986, pp. 281-294.
QBC.RTM. Centrifugal Hematology Control Kit Brochure, Becton Dickinson and Company, 1988.
QBC.RTM. Autoread.TM. Centrifugal Hematology System Brochure, Becton Dickinson and Company, 1991.
QBC.RTM. Centrifuge System Centrifuge Model 424740 Brochure, Becton Dickinson and Company, Aug., 1993.
QBC.RTM. Centrifugal Hematology Control Brochure, Becton Dickinson and Company, 1995.
QBC.RTM. Hematology Control Assay, Becton Dickinson and Company, 1996.
QBC.RTM. Autoread.TM. Plus Brochure, Becton Dickinson and Company, 1996.
QBC.RTM. Hematology Control Instructions for Use, Becton Dickinson and Company, published prior to 1998.
Becton Dickinson and Company
Sawhney Hargobind
Tso Laura K.
Weintraub Bruce S.
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