| 摘要 |
PROBLEM TO BE SOLVED: To provide a light space transmitter provided with the safe light diffusion plate of low light loss with the large effect of diffusion suitable for light space transmission. SOLUTION: In this light space transmitter for emitting a laser beam 13 modulated corresponding to data by a laser light emitting element 15, light- diffusing the laser beam 13 in a light diffusion means, then emitting it to a space and fetching the light-diffused laser beam propagated in the space by a photodetector and reproducing the data on a reception side, the light diffusion means is turned to be an arrangement for which a mirror area 14 for reflecting light is formed at least at a part of the surface of a base material 11 in a plane shape or in a curved surface shape provided with light transmissivity and the diffusion area 12 of the light is formed on the mirror area 14 and the laser beam 13 is made incident inside the diffusion area of the light from the part of a pinhole 16 formed at the light diffusion means. |
