Optical alignment system

Details Optical alignment system Optical alignment system

1986-06-23

1990-05-08

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351223, A61B 302

Patent

active

049232975

ABSTRACT:
A quasi-reticle for an optical device, generated by enhanced multiple reflections. The reticle comprises fixation target generative means operative to generate a line of ghost images or other multiple fixation targets spaced along the optical axis of the optical device, whereby to enable the viewer by aligning his line of sight with the line of multiple fixation targets to position his eye properly with respect to the optical axis of the optical device.

REFERENCES:
patent: 1834017 (1931-03-01), Carbonara
patent: 2232177 (1941-02-01), Ide
patent: 3600098 (1971-08-01), Mohrman
patent: 3871772 (1975-03-01), Munnerlyn et al.
patent: 4272191 (1981-09-01), Bergkvist
patent: 4322137 (1982-03-01), Nohda

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