Relay lens for an endoscope

Details Relay lens for an endoscope Relay lens for an endoscope

1996-08-05

2000-07-11

Spyrou, Cassandra

Optical: systems and elements

Compound lens system

With relay

G02B 2300

Patent

active

060881577

ABSTRACT:
A relay lens for an endoscope or optical instrument is shown. The relay lens includes a first rod-type lens element having a first end and a second end. The first end defines a substantially spherical surface and the second end defines a convex surface. An optical element is positioned in axial alignment with and adjacent the first rod-type lens element. The optical element has a concave surface and a convex surface. The concave surface of the optical element is bonded to the convex surface of the second end of the first rod-type lens element forming a single bonded gap between the concave and convex surfaces. A second rod-type lens element having a first end and a second end, wherein each of the first end and second end defines a substantially spherical surface, is positioned in an axially aligned relationship with the first rod-type lens element and spaced from at least one of the first end of the first rod-type element and the concave surface of the optical element. A method of manufacturing a relay lens is also shown.

REFERENCES:
patent: 4036218 (1977-07-01), Yamashita et al.
patent: 4676606 (1987-06-01), Takahashi
patent: 4693568 (1987-09-01), Takahashi
patent: 5020893 (1991-06-01), Karst et al.
patent: 5568312 (1996-10-01), Horton

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