Optical sheet optical sheet lamination light source device, and

Details Optical sheet optical sheet lamination light source device, and Optical sheet optical sheet lamination light source device, and

1998-04-22

1999-11-30

Spyrou, Cassandra

Optical: systems and elements

Diffusing of incident light

G02B 502

Patent

active

059952881

ABSTRACT:
In an optical sheet 10 having a prism surface 16 formed by providing unit prisms 14 on the upper surface of a transparent base material 12, a coating layer 18 is provided on the reverse surface of the transparent base material opposite to the prism surface 16, spherical beads 20 are arranged projecting from the surface of the coating layer 18 by 1 to 10 .mu.m in height, and the coating layer 18 is brought into contact with the flat and smooth surface 22A of the light-transmissive material 22 through the spherical beads 20 which are put between them. The spherical beads are 1 .mu.m or less in half bandwidth of the distribution of particle diameters and are made uniform in height projecting from the coating layer 18.

REFERENCES:
patent: 5706134 (1998-01-01), Konno et al.

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