| 释义 |
mekometer Mil.|miːˈkɒmɪtə(r)|
[f. Gr. µῆκος length + -meter. Cf. mecometer.]
a. An instrument for finding the range for infantry fire.
1894Times 1 Mar. 6/5 The mekometer, the new English infantry range-finder. 1900Daily News 12 Sept. 6/3 The Watkin mekometer.
b. Also Mekometer. A device for the accurate measurement of distances in which light elliptically polarized at a microwave frequency is beamed at a reflector at the distance to be measured and the polarization of the reflected light analysed to find the amount by which the distance of the reflector exceeds a whole number of modulation half-wavelengths.
1961Froome & Bradsell in Jrnl. Sci. Instruments XXXVIII. 458/1 The paper describes an experimental equipment (known as the ‘N.P.L. Microwave Mekometer’) using elliptical polarization modulation of a light beam at 9·4 Gc/s (9400 Mc/s) and intended for the accurate measurement of distances of the order of 50 m. 1962New Scientist 26 July 207/2 At the NPL the Mekometer is to be used for the verification of surveyors' precision tapes. 1964Trans. Soc. Instrument Technol. XVI. 31 By September 1960 patents had been filed and in early 1961 the mekometer had become a reality using the Pockels effect at 9·375 Gc/s in a device for the accurate measurement of distance. 1970Physics Bull. Aug. 349/2 Prof R G Mason and his collaborators at Imperial College used a new electromagnetic distance measuring instrument, the mekometer, developed by Dr K D Froome..and in the course of nearly two years detected movements of a few centimetres. |