Objective for an endoscope

Details Objective for an endoscope Objective for an endoscope

1987-05-19

1988-07-05

Corbin, John K.

350 9631, G02B 618

Patent

active

047550295

ABSTRACT:
An objective for an endoscope comprising a GRIN lens whose surface on the object side is arranged as a planar surface or convex surface and whose surface on the image side is arranged as a convex surface, the objective for an endoscope having an extremely small outer diameter and a wide field angle.

REFERENCES:
patent: 3801181 (1974-04-01), Kitano et al.
patent: 4101196 (1978-07-01), Imai
patent: 4515444 (1985-05-01), Prescott et al.
patent: 4641927 (1987-02-01), Prescott et al.

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