Optical disk having elastic deformable spacer

Details Optical disk having elastic deformable spacer Optical disk having elastic deformable spacer

1983-10-12

1985-11-26

Goldberg, E. A.

Recorders

Record receivers and/or driving means therefor

Disc

3461351, 369284, G01D 1534

Patent

active

045557160

ABSTRACT:
An optical disk with a recording layer formed on the inner surface of a protective plate has data which is read out upon irradiation of a laser beam. A substrate supports the protective plate such that the recording layer opposes the substrate and a space is formed therebetween. The spacer is sandwiched between the protective plate and the substrate so as to couple them. The spacer is an elastically deformable member. Therefore, when the protective plate expands or contracts relative to the substrate, due to deformation of the spacer, excessive force does not affect the recording medium. Warp, wave or damage to the disk due to expansion/contraction of the protective plate or substrate can be prevented, thereby allowing stable data processing.

REFERENCES:
patent: 4074282 (1978-02-01), Balas, Jr. et al.
patent: 4331966 (1982-05-01), Moe
patent: 4380016 (1983-04-01), Lehureau et al.

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