PERIODIC INSPECTION CARING

Brand	Owner	Address	Description
MONITOR	F. A. BARTLETT TREE EXPERT COMPANY, THE	1290 East Main Street STAMFORD CT 06902	PERIODIC INSPECTION OF AND CARING FOR TREES AND VEGETATION;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

In an inspection system for planar objects having periodic structures, programmable optical Fourier filtering in the focal plane of a telecentric lens system is used to directly identify physical phenomena indicative of non-periodic defects. Lens assemblies and a coherent optical source are used to generate and observe a spatial Fourier transform of a periodic structure in the Fourier plane. Optical Fourier filtering (OFF) is performed in the focal plane using an electrically programmable and electrically alignable spatial light modulator. The spatial light modulator with high signal to noise ratio is electrically reconfigurable according to a feedback-driven, filter construction and alignment algorithm. The OFF enhances any non-periodic components present in the Fourier plane and final image plane of the object. A system having a plurality of inspection channels provides high-throughput inspection of objects with small non-periodic defects while maintaining high detection sensitivity.