Patent ID: 6139175
Filing Date: 2000-10-31
Classification: G02B

Abstract:
A light source device for endoscopes comprising:a light source;a condenser lens unit constructed and arranged to collect light beams emitted from said light source;a light guide that receives said light beams collected through said condenser lens unit into an entrance end face thereof, wherein said light guide transmits said light beams to an exit end face thereof; anda reflecting mirror located on an opposite side of said condenser lens unit with respect to said light source,wherein light beams emitted from said light source are condensed at the entrance end face of said light guide through each of a plurality of independent optical paths in which a condenser lens unit of different numerical aperture is placed; andwherein a switching mirror is provided in an optical path in which said condenser lens unit is placed so that the light beams emitted from said light source are separated in two directions by said switching mirror.