Complete autorefractor system in an ultra-compact package

Details Complete autorefractor system in an ultra-compact package Complete autorefractor system in an ultra-compact package

2006-02-21

2006-02-21

Mantis-Mercader, Eleni (Department: 3737)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S205000, C351S211000, C351S246000

Reexamination Certificate

active

07001020

ABSTRACT:
An autorefractor system in an ultra-compact package is described for rapidly and objectively measuring the refractive state of the eye. The autorefractor detector system, in conjunction with a secondary light source, uses one photodetector such as a charge coupled device (“CCD”) or one photodiode, to intercept a light beam at two distances from a secondary retinal light source created by one relay lens, one pupil emitter conjugate lens and one pupil detector conjugate lens. The signals produced by the photodetector are used to determine the full spherocylindrical refraction of the eye. A novel illumination and imaging system provides multiple capabilities to image the eye, control accommodation, and acquire and maintain optical alignment, while obtaining other measurements of the eye.

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