Optical system and apparatus for magnifying a display panel

Optical: systems and elements – Lens – With multipart element

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Details

359717, G02B 308, G02B 302

Patent

active

057903220

ABSTRACT:
An optical system for magnifying a display panel includes a magnifying lens disposed in front of a display panel. The magnifying lens is constructed with two lenses respectively having convex surfaces opposite each other. At least one of the two convex surfaces is aspherical. A transverse aberration of the magnifying lens is less than the diameter of the pupil of an eye at a point where the eye is positioned. The lens for the optical system is a Fresnel lens whose vortex center is located on its edge. An apparatus for magnifying display panels according to the invention includes an instrument to be viewed distantly and instruments to be viewed not distantly. The instrument to be viewed distantly is disposed distant from the Fresnel lens under a center portion of the Fresnel lens, whereas the instruments to be viewed not distantly are disposed close to the Fresnel lens under an edge portion of the Fresnel lens. An apparatus for magnifying display panels according to the invention includes a display panel illuminating light source disposed inside a housing of the instrument and scale markings provided inside the edge of the opening of the housing.

REFERENCES:
patent: 2780136 (1957-02-01), Erban
patent: 4391495 (1983-07-01), Mazurkewitz
patent: 4542961 (1985-09-01), Sato
patent: 4620773 (1986-11-01), Fukuda
patent: 4670095 (1987-06-01), Negishi
patent: 4767199 (1988-08-01), Yamamoto et al.
patent: 4771368 (1988-09-01), Tsukamoto et al.
patent: 4865419 (1989-09-01), Shepherd
patent: 4936657 (1990-06-01), Tejima et al.
patent: 5129269 (1992-07-01), Iizuka et al.
patent: 5268790 (1993-12-01), Chen
patent: 5583702 (1996-12-01), Cintra

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