Being the light distribution glass lens which consists of the single glass lens where it is categorized to the

摘要

PPROBLEM TO BE SOLVED: To provide a luminous intensity distribution lens for an endoscope that is easy to machine and precludes a significant reduction in luminous intensity even under a large luminous intensity distribution angle. PSOLUTION: The endoscope luminous intensity distribution lens, which comprises a single lens positioned at a distal end of a body insertion part of an endoscope to irradiate an observed target with light of a pseudo surface light source, has many substantially polygonal-pyramid-shaped dimples or projections on a surface opposed to the pseudo surface light source. PCOPYRIGHT: (C)2003,JPO