Hologram scale

Details Hologram scale Hologram scale

1991-08-16

1992-09-29

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

359 15, 359566, G02B 532, G03H 102

Patent

active

051517981

ABSTRACT:
A hologram scale is comprised of a hologram grating plate in which a hologram grating is formed, and a protecting substrate on which an origin and/or fixed point detecting scale of the hologram grating is formed, wherein the protecting substrate is bonded to the hologram grating plate so as to cover the hologram grating plate at its surface on which the hologram grating is formed. Also, a hologram scale is comprised of a hologram grating plate in which a hologram grating is formed, an origin and/or fixed point detecting scale substrate on which an origin and/or fixed point detecting scale of the hologram grating is formed, and a protecting substrate to which the hologram grating plate and the origin and/or fixed point detecting scale substrate are both bonded.

REFERENCES:
patent: 4676645 (1987-06-01), Taniguchi et al.
patent: 4834475 (1989-05-01), Robinson
patent: 4998784 (1991-03-01), Freeman et al.
patent: 5033817 (1991-07-01), Stephens
patent: 5066525 (1991-11-01), Nakamachi et al.

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