Patent ID: 9395066
Filing Date: 2016-07-19
CPC Classification: F21L,F21V,F21Y

Claim Text:
1. An adjustable beam illuminator comprising: a light emitting diode having a cross-sectional shape; an aperture formed in a surface and having a cross-sectional shape different from that of the light emitting diode, wherein the aperture transmits a central portion of a beam of light emitted by the light emitting diode, and outer portions of the beam from the light emitting diode are blocked; an aspheric collecting lens mounted on the surface in which the aperture is formed, the aspheric collecting lens having a numerical aperture greater than or equal to about 0.5, and positioned to image the light emitting diode through the aperture to produce a beam of collected light having a cross-sectional shape approximately the same as that of the light emitting diode, the aspheric collecting lens positioned a distance from the light emitting diode that is equal to the focal length of the side of the aspheric collecting lens that faces the light emitting diode, wherein the aspheric collecting lens is larger than the aperture; and a collimating lens adjustably positioned along an optical axis of the illuminator, the position of the collimating lens adjustable between a first position along the optical axis from which the collimating lens provides from the collected beam of light a substantially collimated output beam of light having a cross-sectional shape approximately the same as that of the aperture and a second position along the optical axis from which the collimating lens provides from the collected beam of light a diverging flood illumination beam of light also having a cross-sectional shape approximately the same as that of the aperture.