Optical method and device for performing geometrical...

Details Optical method and device for performing geometrical... Optical method and device for performing geometrical...

2007-01-09

2007-01-09

Pham, Hoa Q. (Department: 2877)

Optics: measuring and testing

Dimension

C356S638000

Reexamination Certificate

active

10501327

ABSTRACT:
A light source (1) sends towards an object under test (5) a light beam (2) with such a size as to encompass the object (5). Past the object, the beam (2) is processed by an optical processing system (6), comprising a band-pass spatial filter (8) located in the Fourier Plane of a converging lens (7), the object (5) being located in the front focal plane of that lens. The filtered beam is collected by a detector (10) that generates an electrical signal representative of the intensity of the field distribution associated with that beam. A system (11) for processing the electrical signal comprises a band-pass filter (12) with temporal cut-off frequencies corresponding with the spatial cut-off frequencies of the spatial filter in the optical processing system (6) and obtains the value of the requested quantity form the electrical signal.

REFERENCES:
patent: 4417147 (1983-11-01), Faville
patent: 6922254 (2005-07-01), Blohm et al.
patent: 2003/0160974 (2003-08-01), Demeyere et al.

Affiliated with

Also associated with

Rating

Optical method and device for performing geometrical... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical method and device for performing geometrical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical method and device for performing geometrical... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3732685