SPOT-LIGHT AND LIGHT SOURCE UNIT

摘要

PROBLEM TO BE SOLVED: To provide a spot-light that solves various kinds of problem of a spot-light that uses a light bulb as a single light source which generates light by heating a filament to as high a temperature as possible by having many self-luminous solid-state elements as light sources, and a light source unit for such use. SOLUTION: A spot-light is realized that can change the illuninance of a lighted surface and an illuminance distribution by arranging many self-luminous solid-state elements as light sources on a curved surface, constituting an imaginary single point light source unit by condensing the irradiant beams of each light source into one point, and varying the positional relation between the light source unit and a projection lens.