Method and apparatus for detecting a missing object in a set of

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage

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324 585R, 324 58A, 340673, 340674, G01R 2704

Patent

active

048900532

ABSTRACT:
A millimeter wave detector for detecting missing cigarette packs or other types of objects in a set of objects is provided. The detector uses millimeter wave radiation at about 90 GHz to resolve small features of the objects being scanned. The detector can detect defects or missing packs in configurations that would not be detected by previously known detectors.

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P. F. Goldsmith, "Quasi-Optical Techniques at Millimeter and Submillimeter Wavelengths," Infrared and Millimeter Waves, vol. 6, ch. 5, (K. J. Button, ed., 1982).
P. F. Goldsmith et al., "Gaussian Optics Lens Antennas," Microwave Journal, Jul. 1984, (Millitech Corporation reprint, Sep. 1984).

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