Lighting apparatus

Details Lighting apparatus Lighting apparatus

1982-07-21

1985-08-27

Lechert, Jr., Stephen J.

Illumination

Light source and modifier

Including translucent or transparent modifier

362309, 362310, 362328, 362329, 362333, 362334, 362335, 362339, 362340, 362375, F21V 300

Patent

active

045382166

ABSTRACT:
An lighting apparatus including a housing having an opening, a light source received in the housing and a light transmitting-cover fixed at the opening of the housing and through which light rays are projected from the light source. The light transmitting-cover includes a plate made of light transmitting-material and having a first surface and a second surface. Segment lens elements of the same size are arranged on the first and second surface of the plate and formed integrally with the plate. The segment lens elements on the first surface are positioned in face-to-face relation with the segment lens elements arranged on the second surface, thus forming a segment lens. The segment lens elements have a common optical axis and convex surfaces, respectively. The focal lengths defined by these convex surfaces are equal. The focal point of one of the segment lens elements lies on the convex surface of the other segment lens element, and the focal point of the other segment lens element lies on the convex surface of the other segment lens element.

REFERENCES:
patent: 1211447 (1917-01-01), Houze
patent: 1250669 (1917-12-01), Sailer et al.
patent: 1317872 (1919-10-01), Griswold
patent: 1489697 (1924-04-01), Carson
patent: 2220639 (1940-11-01), Borsarelli
patent: 4165154 (1979-08-01), Takahashi
patent: 4373178 (1983-02-01), Gulliksen
Applied Optics, vol. 12, No. 2 (Feb. 1973), D. R. Buchele, "Lens Projection System for Solar Simulator Providing Irradiance of 100 Solar Constants," pp. 355-358.

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