| 摘要 |
A relay lens system for an endoscope is provided and includes three axially aligned cylindrical lens pairs, each lens pair having two substantially rod-like lenses. Each rod-like lens includes a convexo-concave polymeric aspheric lens and a concavo-convex polymeric aspheric lens which are symmetrically placed and affixed about a glass rod with flat ends by means of plano-convex optical cement lens elements. The optical cement lens elements form lens-like elements which contribute to both the color and geometric aberration correction of the lens system. When inserted as a component of an endoscope or laparoscope, the distal end of the relay lens system is axially aligned with an objective lens and the proximal end is axially aligned with a viewing eyepiece. The image formed at the distal end of the endoscope by the objective lens is transmitted by the relay lens system, which inverts once and refocuses twice before forming a final upright image in front of the eyepiece for viewing or recording.
|
