Lexalite International Corporation

Lexalite Corporation

Josh T Barnes

Paul C Belding

Thomas F Barnes

Ronald L Sitzema, Jr

Joel E Robinson

Dale A Troppman

Earl E Smith

An edge-lit luminaire includes a panel formed of a transparent material. The panel includes first and second opposing surfaces. At least one edge light source is positioned proximate to the panel. A plurality of prismatic reflective/refractive elements is spaced apart on a predefined pattern on the second surface. The plurality of prismatic reflective/refractive elements have a predefined contour for accurate ray direction control. The predefined pattern on the second surface includes predefined gradient spacing and size variables of the prismatic reflective/refractive elements for providing uniform ray emission across the panel. The plurality of prismatic reflective/refractive elements have a predefined relative spacing of the prismatic reflective/refractive elements based upon a position relative to the light source. Also the predefined relative size of each of the prismatic reflective/refractive elements can be based upon its position relative to the light source.

Edge-lit luminaire having prismatic optical control

Combined prismatic reflector and lens for a lighting fixture

A combination of a prismatic reflector and a prismatic lens is provided for use with lighting fixtures. A reflector body has a substantially parabolic contour defining an interior cavity. The reflector body includes a plurality of prisms for receiving, transmitting and reflecting light. A lens body has a first mating surface engaging the reflector body, an opposed inverted conical surface, and a sloping sidewall extending between the mating surface and the opposed inverted conical surface. The mating surface of the lens body has a larger diameter than the opposed inverted conical surface. The opposed inverted conical surface includes a plurality of prisms for receiving and for redirecting light.

Prismatic reflector and prismatic lens

An improved lighting fixture includes a light reflecting and/or light transmitting member for reflecting or transmitting visible light. A light transmitting film is disposed adjacent the light reflecting or transmitting member. The light transmitting film is formed of a glutarimide acrylic copolymer. The glutarimide acrylic copolymer film provides protection to the light reflecting and/or transmitting member from damaging effects of ultraviolet radiation and is substantially resistant to ultraviolet radiation.

Lighting fixture with an improved light transmitting film

An optical system is provided for traffic signal devices. The optical system includes an illuminating source for emitting light; a prismatic reflector for receiving and reflecting the emitted light; and a lens for receiving and for redirecting the reflected emitted light. The illuminating source and the reflector are aligned along a first axis that is vertically inclined relative to a central horizontal axis of the traffic signal device in a range between approximately 2 degrees and 4 degrees. The reflector has a substantially parabolic contour and has a plurality of substantially vertical critical angle prisms formed on an outside surface of the reflector. The prism have included angles of greater than 90 degrees but less than or equal to 95 degrees, or included angles of greater than or equal to 85 degrees but less than 90 degrees. The prisms are arranged to have included angles sequentially increasing from a first predetermined included angle proximate to the illumination source to a second predetermined included angle proximate to the lens. The traffic signal device includes a housing and the lens has an outer face spaced exterior from the housing allowing a portion of the reflector to extend within the lens outside the housing.

Signal reflector and optical system

A reflector/refractor device is provided for use with a variety of lighting fixtures and light sources. The reflector/refractor device includes a body having a predetermined profile and defining a cavity with the body having an inside surface and an outside surface. An illuminating source for emitting light is disposed within the cavity substantially along a central vertical axis of the body. The body includes a series of sectional zones for reflecting and refracting light. The exterior surface of the device includes a plurality of substantially vertical prisms consisting of reflective elements, refractive elements and elements that may be either reflective or refractive depending on light center location. These reflective or refractive elements act in combination to selectively vary light distribution characteristics of vertical and lateral angles, and intensities, by vertical displacement of the illuminating lamp source.

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Charlevoix, MI, United States of America

Josh T Barnes