Optical System for an Endoscope

摘要

A lens assembly of a viewing element for an endoscope has lenses and a barrel containing the lenses. The internal surface of the barrel is shaped in accordance with the relative position and size of the lenses and a lens holder encompassing at least a portion of the barrel. The barrel and/or the lens holder are injection-molded and can be variably positioned relative to each other. An optional adhesive layer that reduces or eliminates small particles from the viewing element is positioned on an inner surface of the barrel and/or lens holder and used to remove any internal particulate matter that may otherwise obstruct the field of view.

主权项

1. A lens assembly manufactured by a process of:
forming a barrel having a length, a proximal end, a distal end, an inner surface profile and an outer surface; placing a plurality of lenses into said barrel wherein said inner surface profile of said barrel is configured to receive and hold said lenses; sliding said barrel into a lens holder having an inner surface, a proximal end and a distal end; setting an optimum focal length by axially moving said barrel relative to and within said lens holder; and fixedly securing the barrel to the lens holder.