| http://www.w3.org/ns/prov#value | - No. 43,031, filed May 25, 1979, now Pat. No. 4,281,245, discloses a number of embodiments for measuring physical quantities such as position, force, pressure, temperature, etc. by fiber-optic methods utilizing the ray path through one or more interference filters, the positions of which relative to a fiber end surface may be caused to vary by the physical characteristic being measured.
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