Method and apparatus for evaluating the optical spatial response

Optics: measuring and testing – By particle light scattering – With photocell detection

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

356359, G01B 902

Patent

active

053594118

ABSTRACT:
An apparatus and method for optically testing an object, such as an optical etector whose pixels are an array of optically sensitive charged coupled devices. Two mutually coherent beams of light are interfered on the object to form an interference fringe pattern of sinusoidally varying intensity of preselected spatial frequency. The object's response at this spatial frequency is used to determine one point of the object's modulation transfer function at that frequency. This is preferably done by using the device's output to infer the coherence function of the fringe pattern, taking the Fourier transform of the coherence function, and determining the amplitude of the function at the spatial frequency of the fringe pattern. The process can be repeated for different spatial frequencies until one determines the entire modulation transfer function.

REFERENCES:
patent: 4496216 (1985-01-01), Cowan
patent: 5231468 (1993-07-01), Deason et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for evaluating the optical spatial response does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for evaluating the optical spatial response, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for evaluating the optical spatial response will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-139130

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.