Concentrating and collecting optical system using concave toroid

Details Concentrating and collecting optical system using concave toroid Concentrating and collecting optical system using concave toroid

1995-06-07

1998-11-17

Cariaso, Alan

Illumination

Revolving

362298, 362346, 362347, F21V 704

Patent

active

058366679

ABSTRACT:
An electromagnetic radiation source, such as an arc lamp, is located at a point displaced from the optical axis of a concave toroidal reflecting surface. The concave primary reflector focuses the radiation from the source at an off-axis image point that is displaced from the optical axis. The use of a toroidal reflecting surface enhances the collection efficiency into a small target, such as an optical fiber, relative to a spherical reflecting surface by substantially reducing aberrations caused by the off-axis geometry. A second concave reflector is placed opposite to the first reflector to enhance further the total flux collected by a small target.

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