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Rod-shaped-linear-light-diffusion-apparatus

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Rod shaped linear light diffusion apparatus

Details

Inventors: Sasada, Shigeru;
Assignee: Dainippon Screen Mfg. Co., Ltd. (JP)
Primary Examiner: Sikes; William L.
Assistant Examiner: Ullah; Akm E.
Attorney, Agent or Firm: Ostrolenk, Faber, Gerb & Soffen

A linear light diffusing apparatus is formed of a transparent cylindrical rod. A white layer is formed on the outer periphery of the cylindrical rod along the longitudinal direction thereof. A plurality of elongated saw tooth shaped grooves are formed on the opposite side of the outer periphery. Light entering from one end of the transparent cylindrical rod is irregularly reflected by the white layer. The irregularly reflected light is refracted by the saw tooth shaped grooves to be linearly condensed at a prescribed position.

DETAILED DESCRIPTION It is an object of the present invention to provide desired luminous fluxes in a rod shaped linear light diffusion apparatus.
Another object of the present invention is to generate luminous fluxes which can be linearly condensed.
A further object of the present invention is to generate parallel fluxes from a transparent rod shaped linear light diffusion apparatus.
A still further object of the present invention is to evenly distribute the illuminance of light generated from a transparent rod shaped linear light diffusion apparatus.
Since the rod shaped linear light diffusion apparatus has the above described components, incident light can be diffused in a desired direction with respect to the optical axis (intersecting the longitudinal direction of the apparatus), and the direction can be selected as desired.
Therefore, desired luminous fluxes can be obtained from the rod shaped linear light diffusion apparatus.
Other features and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings.

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