Method of and apparatus for focusing a light flux

Details Method of and apparatus for focusing a light flux Method of and apparatus for focusing a light flux

1999-10-01

2000-11-21

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

061492744

ABSTRACT:
An apparatus for focusing a light flux, includes a light source, and a light-conducting system which guides light radiating from the light source along a first light-conducting passageway oriented in a direction of the path of light, and along a second light-conducting passageway extending at an angle to the first light-conducting passageway. The light conducting system includes a first optical lens which is positioned at an entry side into the first light-conducting passageway, a deflector which is positioned at an exit side of the first light-conducting passageway for deflecting visible light into the second light-conducting passageway, and an optical assembly which is disposed in the second light-conducting passageway. The optical assembly is formed by an dimming disk, adjustable with respect to the second light-conducting passageway, for selective control of light intensity of the visible radiation, and a second optical lens for focusing the deflected radiation.

REFERENCES:
patent: 5003434 (1991-03-01), Gonser
patent: 5203353 (1993-04-01), Easlet

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