Object detector

Details Object detector Object detector

2008-06-03

2011-10-11

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S200700, C359S224100

Reexamination Certificate

active

08035875

ABSTRACT:
An object detector has a light projecting unit that projects light, a light scanning actuator that scans the light, and a light receiving unit. The light scanning actuator includes plate springs, each having a thin-plate shape and one end in a longitudinal direction thereof being fixed; a movable part attached to the other ends in the longitudinal directions of the plate springs; and an electromagnetic driving unit having a magnet that generates a magnetic flux, a yoke that forms a closed magnetic circuit with the magnet and has a part being stacked on the magnet, and a coil held by the movable part and positioned in a gap between the magnet and the yoke such that an aperture plane is substantially orthogonal to a stacking direction of the magnet and the yoke, the electromagnetic driving unit configured to drive the movable part by an electromagnetic force applied to the coil.

REFERENCES:
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patent: 2003/0035188 (2003-02-01), Tominaga et al.
patent: 2009/0128877 (2009-05-01), Hirata et al.
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International Search Report and Written Opinion dated Jul. 8, 2008 issued in International Application No. PCT/JP2008/060195.
Chinese Office Action for Chinese Patent Application No. 200880018834.8 dated Jun. 29, 2011.

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