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Light source device using optical fibers

  • US 6,375,343 B1
  • Filed: 08/13/1999
  • Issued: 04/23/2002
  • Est. Priority Date: 08/17/1998
  • Status: Expired due to Fees
First Claim
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1. Light source device having a filament lamp, a reflector, and optical fiber, light emitted from the filament lamp being focused and reflected by reflector and incident in an end face of the optical fiber;

  • wherein the reflector is an ellipsoid of revolution having first and second focal points;

    wherein a filament coil of the filament lamp is located at the first focal point and the end face of the optical fiber is located at a second focal point; and

    wherein an area of the filament of the filament lamp A (mm2), an area of the incidence face of the optical fiber B (mm2), and a value of a focal length C, set as a distance between an apex of the reflector and the first focal point divided by a distance between the apex of the reflector and the second focal point, have a relationship with respect to each other such that a constant a defined by the relationship;

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