Structure for masks
A light shield and through-hole technology, applied in the field of light shield structure, can solve the problem of high output voltage of sensor circuit
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[0043] The pyroelectric sensor having the structure including the light shield 110 according to the first embodiment will be described.
[0044] Figure 8 A shows the external view of the hood 110, Figure 8 B shows an example of the dimensions of the opening pattern 112 of the shade 110 .
[0045] The shade 110 includes: a sheet portion 111 for blocking infrared rays; an opening pattern 112 formed of a plurality of through holes formed in the sheet portion 111 ; and a mounting portion 113 . The light shield structure includes a sheet portion 111 and an opening pattern 112 .
[0046] For example, the shade 110 (perforated metal plate) is molded by pressing a metal plate.
[0047] On the detection surface of the pyroelectric sensor, the arrangement direction of the two pyroelectric elements of the pyroelectric sensor is defined as the x direction, and the direction perpendicular to the x direction on the detection surface is defined as the y direction. The opening pattern 1...
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