Illuminating device
AssigneesAgency of Industrial Science and Technology, Daikin Industries, Ltd.
InventorsHiroshi Yamashita, Kanenaga Fujii, Junji Hayakawa, Toru Komiyama, Shun Koizumi
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Abstract
This invention provides an illuminating device characterized in that the device comprises a light-transmitting rod for transmitting the light incident on one end thereof toward the otehr end, a diffusion pattern formed on the outer peripheral surface of the rod by adhering a fine powder of high refractive index in the shape of a line extending continuously or discretely axially of the rod, and a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof.
Claims16
An illuminating device characterized in that the device comprises:
- a light-transmitting rod for transmitting the light incident on one end thereof toward the other end,
- a light-impervious diffusion pattern which is formed on the outer peripheral surface of the rod in the shape of a discrete line extending continuously or discretely axially of the rod and which is capable of diffusing and reflecting the transmitted light incident thereon back through the rod and out an opposite side of the rod in a directional projection, said diffusion pattern comprising a fine powder of high refractive index and an adhesive, and
- a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof.
Dependencies are inferred from the claim text.