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RESEARCH PRODUCT

<title>Compact illuminators, collimators, and focusers with half-sperical input aperture</title>

subject

description

Inexpensive semi-point light sources completed with integral concentrators of the emitted radiation can find many applications in machine vision systems. Three designs of half- spherical input aperture dielectric concentrators optimized for small spot illumination, collimation, and point-focusing are discussed here. The designs provide conversion of radially emitted light into narrow beam of the desired profile by means of total internal reflection and refraction on specially shaped aspherical surfaces. Analytic expressions describing the surface shapes as well as raytracing results are presented.