Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – For interpupillary distance measuring or lens positioning
Patent
1988-07-26
1989-11-21
Dzierzynski, P. M.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
For interpupillary distance measuring or lens positioning
351210, A61B 310
Patent
active
048818062
ABSTRACT:
To measure automatically a distance related to the interpupillary distance of a person, a light source generates a corneal reflection on at least one eye of the person. By means of a scanning system such as a rotating mirror, a sensor receiver is scanned transversely to the general direction of observation of the person to direct light rays from the corneal reflection or reflections onto the sensor receiver in which is a measurement reference mark relative to which the corneal reflection or reflections is or are located.
REFERENCES:
patent: 4591246 (1986-05-01), Cousyn et al.
Brown Charles A.
Brown Charles E.
Dzierzynski P. M.
Essilor International "Cie Generale d'Optique
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