Patent ID: 7261438
Filing Date: 2007-08-28
Classification: F21L,F21V,F21Y

Abstract:
1. A lighting device comprising: a light source for generating a light beam; a first magnifier lens disposed in a path of the light beam; a second magnifier lens disposed in the path of the light beam; an adjusting mechanism adjustable to move the first and second magnifier lenses relative to the light source to adjust size of the light beam and provide a substantially uniform light beam; and wherein the adjusting mechanism comprises a cylindrical barrel member and a pair of sleeve members, wherein first and second female receptacles are provided on one of the cylindrical barrel member and the pair of sleeve members, and the first and second male members are provided on the other of the cylindrical barrel member and the pair of sleeve members, and wherein the first and second male members travel within the first and second female receptacles so that when the cylindrical barrel member is rotated the pair of sleeve members move axially relative to each other.