Two-element eyepiece

Details Two-element eyepiece Two-element eyepiece

1976-02-09

1977-04-12

Sacher, Paul A.

350231, G02B 906

Patent

active

040171590

ABSTRACT:
A two-element eyepiece having a biconvex singlet with the radii of the convex surfaces being substantially identical and a convex-plano doublet formed of a biconvex element having radii of the convex surfaces being substantially equal with a concavo-plano component cemented thereto, has a field of view of approximately 40.degree. with good correction for normal eyepiece aberrations. Eye relief is approximately 80 percent of the effective focal length.

REFERENCES:
patent: 3421807 (1969-01-01), Nothnagle et al.

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