Hologram scale having moisture resistance

Details Hologram scale having moisture resistance Hologram scale having moisture resistance

1990-02-28

1992-12-15

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

359 15, 359566, G02B 518, G02B 532, G03H 102

Patent

active

051722500

ABSTRACT:
A hologram scale having a base substrate, a hologram film with a diffraction grating of a desired pitch exposed thereon, adhered to the base substrate, and with a protective substrate to protect the hologram film is manufactured by the following method: a hologram of a laser produced diffraction grating is formed on a holographic film to act as a scale. This film is applied on a central portion of a base substrate. Adhesives having moisture resistance are applied between the base and the protective substrates to essentially surround the hologram film positioned on the base substrate. The protective and the base substrates are sealed integrally by the adhesives, securing the hologram film therein so as to protect it from ambient environmental conditions.

REFERENCES:
patent: 4179182 (1979-12-01), Smith
patent: 4330604 (1982-05-01), Wreede et al.
patent: 4789211 (1988-12-01), Wreede
patent: 4871411 (1989-10-01), Kushibiki et al.
patent: 4908285 (1990-03-01), Kushibiki et al.
patent: 4913990 (1990-04-01), Rallison
patent: 4946533 (1990-08-01), Kushibiki et al.

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