Method for determining mechanical property of resin discs and op

Details Method for determining mechanical property of resin discs and op Method for determining mechanical property of resin discs and op

1999-06-08

2000-07-18

Font, Frank G.

Optics: measuring and testing

By inspection with agitation or rotation

356385, 356384, G01N 2184, G01B 1104

Patent

active

06091503&

ABSTRACT:
A mechanical property such as axial acceleration of an injection molded resin disc substrate or an optical disc comprising the same is determined by measuring a variation in radius or diameter of the substrate or disc in its circumferential direction, and determining the mechanical property of the substrate or disc from the measurement.

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patent: 5983167 (1999-11-01), Ebisawa
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