Reflection-type hologram scale and optical displacement measurin

Details Reflection-type hologram scale and optical displacement measurin Reflection-type hologram scale and optical displacement measurin

1999-10-08

2000-09-05

Henry, Jon

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359572, 250237G, 356356, G02B 532, G02B 518, G01B 1102

Patent

active

06115153&

ABSTRACT:
A holographic grating 12 is formed on one surface of a scale substrate 11 in such a manner that a light source is disposed over the other surface of the scale substrate 11. The scale substrate 11 is formed of a transparent material. A reflection film 13 is directly deposited on the grating surface. A protection substrate 15 is adhered to the reflection film 13 on the scale substrate 11 with adhesive agent 14. Thus, a reflection-type hologram scale 1 is accomplished.

REFERENCES:
patent: 5258861 (1993-11-01), Tsuchiya
patent: 5377044 (1994-12-01), Tomono et al.

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