ILLUMINATION OPTICAL SYSTEM WITH TUNABLE BEAM ANGLE

摘要

An illumination optical system with a tunable beam angle (IOSTBA) is presented to achieve different beam angles without changing parts. The IOSTBA includes a light source and a post having a proximal end and a distal end, the proximal end in optical communication with the light source, an internal area of the post having a reflective surface. Also shown is a diffuser disposed across the end of the post, the diffuser in optical communication with the post and a reflector surrounding a portion of the post, the reflector movable along a length of the post. A position of the reflector along the post determines a beam angle of a resulting light beam exiting the IOSTBA. The system features a simple and cost effective optical design which works with a variety of light sources, including color mixing and champing strategies.

主权项

1. An optical system comprising:
a light source; a post having a proximal end and a distal end, the proximal end in optical communication with the light source, an internal area of the post having a reflective surface; a diffuser disposed across the distal end of the post, the diffuser in optical communication with the post; and a reflector surrounding a portion of the post, the reflector movable along a length of the post, wherein a position of the reflector along the post determines a beam angle of a resulting light beam exiting the optical system.