Optical element for use as a transparent viewing window

Details Optical element for use as a transparent viewing window Optical element for use as a transparent viewing window

1988-03-25

1990-10-16

Arnold, Bruce Y.

350319, G02B 2700

Patent

active

049630091

ABSTRACT:
An optical element of substantial thickness with a spherical convex surface and a spherical concave surface which are concentrically arranged. This optical element, combined with an adequate plus-power effect of the slightly and physiologically accommodating human eye lenses of the normal-sighted observer's eyes, which for the desired distance vision compensate the weakly negative refractive power of the optical element, as a transparent viewing window, is brought into a suitable position near the observer's emmetropic eyes. This combined system presents a real telescope in contrast to the hitherto known concentric lenses.

REFERENCES:
patent: 3611970 (1971-10-01), Hagan et al.
patent: 4213029 (1980-07-01), Endicott, Jr. et al.
Gernet et al, "Intraokulare Optik in Klinik und Praxis", Rothacker, 1978.

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