Indicator light assembly with fluorescent lens

Details Indicator light assembly with fluorescent lens Indicator light assembly with fluorescent lens

1986-10-21

1987-12-29

Yeung, James C.

Illumination

Revolving

362326, 362331, F21V 704

Patent

active

047165014

ABSTRACT:
A clear plastic lens contains a fluorescent dye. The lens is substantially parallelepiped in shape with two major opposed parallel surfaces and four sides. Three of the sides are reflecting sides. Each reflecting side has two flat transparent surfaces positioned at angles of 135 degrees relative to the opposed parallel surfaces. The fourth side is a transmitting side that has one flat transparent surface perpendicular to the opposed parallel surfaces. Light enters the lens through an opposed parallel surface, is absorbed by the fluorescent dye, and is emitted a short time later. The emitted light is reflected at the reflecting sides and opposed surfaces, and redirected towards the transmitting side where it passes into the environment as a collimated beam.
In another embodiment, the transmitting side is at an oblique angle relative to the opposed parallel surfaces and has a plurality of small steps. Each step has two surfaces, one perpendicular and one parallel to the opposed parallel surfaces. The emitted light passes into the environment through the first surfaces of the steps.
The complete assembly includes the lens positioned adjacent a circuit board. An opening in the board permits light to enter the lens from a lamp which is soldered to the opposite side of the board over the opening.

REFERENCES:
patent: 4177501 (1979-12-01), Karlin
patent: 4215390 (1980-07-01), Brandt
patent: 4220948 (1980-09-01), Trame
patent: 4238524 (1980-12-01), LaLiberte et al.
patent: 4257084 (1981-03-01), Reynolds
patent: 4323951 (1982-04-01), Pasco
patent: 4329378 (1982-05-01), Tarumi et al.
patent: 4408803 (1983-10-01), Green et al.
Steven Ashley, "Razzle-Dazzle Plastic," Popular Science, Apr. 1986, pp. 100-101.
Mobay Chemical Corporation, "Provisional Information Sheet--LISA-Plastics," Publication No. KL 47.310e, Jan. 10, 1983.

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