Graduation scale having a continuous planar surface with a prote

Details Graduation scale having a continuous planar surface with a prote Graduation scale having a continuous planar surface with a prote

1994-11-14

1996-09-24

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

055595995

ABSTRACT:
A measuring instrument having at least one phase transmission graduation formed on a carrier member in which the graduation is formed by grating structures in a graduation region of the carrier member, the graduation region of the carrier member having a continuous planar surface.

REFERENCES:
patent: 4776701 (1988-10-01), Pettigrew
patent: 4795236 (1989-01-01), Ise
patent: 4991937 (1991-02-01), Urino
patent: 5119231 (1992-06-01), Nelson et al.
patent: 5126560 (1992-06-01), Kraus
Willhelm, Jorg. "Photoelektrische Aufnehmer Zur Messung von Lageanderungen." Diss. U. of Hannover, 1978, p. 19.
Poner, T. et al., "Transmission Phase Gratings By Ion-Exchange In Optical Glasses," Gradient-Index Optical Systems--Summaries of Papers Presented at the Tenth Topical Meeting on Gradient--Index Optical Systems, pp. 76-9, Oct. 4-6, 1992.

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