| 摘要 |
A sensor chip is arranged on a top of a housing. An optical lens having a recess in a lower surface thereof is arranged above the sensor chip. A shading plate having a through hole is arranged between the lens and the sensor chip. A shape and size of an opening of the recess of the lens are substantially the same as a shape and size of a top opening of the through hole of the shading plate. An outer peripheral edge of the opening of the recess of the lens is vertically substantially aligned with an outer peripheral edge of the top opening of the through hole of the shading plate. Furthermore, the lower surface of the optical lens is engaged with a top surface of the shading plate.
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