FIELD: physics.
SUBSTANCE: mask is a sheet made of an infrared radiation-blocking material. The mask has through-holes, which are formed to enable the percentage change of the corresponding regions of two pyroelectric elements irradiated by infrared rays when the radiation source moves on two coordinate axes. The holes form two aperture regions. The boundary of one of the aperture regions protrudes in the direction perpendicular to the arrangement of the pyroelectric elements, further than the boundary of the other aperture region.
EFFECT: high sensitivity and enabling the detection of a moving object simultaneously on two coordinate axes.
6 cl, 40 dwg
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