Adapter for positioning a lens

Details Adapter for positioning a lens Adapter for positioning a lens

G - Physics

01

P

G01P 1/02 (2006.01) G01J 5/04 (2006.01) G01P 13/00 (2006.01) G08B 13/193 (2006.01)

Patent

CA 2313820

A multifunction adapter for use in a motion sensor module holds a lens at the front of the adapter in a predetermined position and distance relative to a sensor mounted on a circuit board, and uses positioning projections at the rear of the adapter to set a predetermined distance of the adapter from the sensor and the circuit board. The adapter can be adjusted to set the focal point of the lens at an optimized position for the sensor. Additionally, a cover that shrouds the sensor is present on the rear side of the adapter for reducing or eliminating air flowing across and around the sensor. When the sensor is a passive infrared device, the reduction in air flowing around and across the sensor reduces the number of false signals.

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