FIELD: instruments. SUBSTANCE: device has two-part infrared receivers, two amplitude subtracters and two inverters. first and second outputs of first and second of infrared receivers are connected to first and second inputs of first and second amplitude subtracters respectively. Outputs of amplitude subtracters are connected to first and second inputs of measuring unit through inverter. EFFECT: increased precision. 3 dwg
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Authors
Dates
1997-07-20—Published
1994-02-14—Filed