Reflection type optical focusing apparatus

Details Reflection type optical focusing apparatus Reflection type optical focusing apparatus

1982-06-02

1984-07-03

Lechert, Jr., Stephen J.

Illumination

Light source and modifier

Including reflector

362298, 362302, 362346, 362347, 350505, F21V 700

Patent

active

044583028

ABSTRACT:
A reflection-type optical focusing apparatus comprising an optical focusing system including at least two 4th-degree surface reflectors with their revolving symmetric axis formed by a line connecting the position of a point source and the point source focusing position, said reflectors being used in combination so that the light emitted from a point source placed at the point source position is focused to form a virtual point source at the point source focusing position, and a 4th-degree surface reflector with its cross-section, on a plane including the revolving symmetric axis, forming a part of an ellipse with its major axis having a certain inclination with respect to the revolving symmetric axis, said virtual point source being located at one focal point of the ellipse so that a light image in the shape of an arc band is obtained.

REFERENCES:
patent: 4294538 (1981-10-01), Ban

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