Artificial vision lens system as well as artificial vision camer

Details Artificial vision lens system as well as artificial vision camer Artificial vision lens system as well as artificial vision camer

1999-02-26

2000-10-24

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

623 41, A61B 310

Patent

active

061355976

ABSTRACT:
An artificial vision lens system suitable for simulating a retinal image obtained when a subject wears eyeglass lenses. The artificial vision lens system 3 corresponding to an ocular optical system is designed based on optical constants of a paraxial area calculated from a Glustrand's precision simulated eye. The artificial vision lens system 3 comprises, in order from the object side, a front lens group 31 composed of lenses L.sub.1 and L.sub.2 and having negative refracting power, a stop 32, and rear lens group 33 composed of lenses L.sub.3 through L.sub.6 and having positive refracting power. Positions of the object side principal point and the turning point of the artificial vision lens system 3 may be set at positions suitable for simulating the eyeglass lens and the eyeball. An image (retinal image) of the artificial vision lens system 3 is imaged by a CCD 5.

REFERENCES:
patent: 4437734 (1984-03-01), Iizuka
patent: 5532770 (1996-07-01), Schneider et al.
patent: 5546142 (1996-08-01), Kobayashi

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