Light source device using optical fibers
First Claim
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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Accused Products
Abstract
A light source device using an optical fiber in which the light emitted from a filament lamp is incident on the end face of the optical fiber with high efficiency is achieved by using a reflector which is an ellipsoid of revolution having first and second focal points, the filament coil of the lamp being located at the first focal point and the end face of the optical fiber being located at a second focal point. Furthermore, the 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:
has a value that is less than or equal to 20.
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Citations
10 Claims
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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;
- View Dependent Claims (2, 3, 4, 5)
- wherein the reflector is an ellipsoid of revolution having first and second focal points;
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6. Apparatus for photopolymerization for dental purposes, which comprises a power source and a light source device, said light source device having a filament lamp, a reflector, and an 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 α
defined by the relationship;
- View Dependent Claims (7, 8, 9, 10)
- wherein the reflector is an ellipsoid of revolution having first and second focal points;
Specification