Method and apparatus to determine spatial distribution of magnit

Details Method and apparatus to determine spatial distribution of magnit Method and apparatus to determine spatial distribution of magnit

1974-06-21

1976-04-13

Smith, Alfred E.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356109, G01B 902

Patent

active

039501035

ABSTRACT:
A method and apparatus for numerical determination of the distribution of magnitude and phase of a time harmonic electromagnetic, particularly an optical, wave field by using the wavefront of a reference wave as the optical reference surface and by introducing additional information to the recording process such that the field becomes uniquely determined and this is realized by the recording of three interference fringe patterns which belong to variations of the reference field distribution. A reference field is chosen whose spatial distribution is similar to the unknown field whereby fringes are obtained the position of which varies slowly with the recording coordinates. The recorded data are numerically evaluated and this may be done conveniently in a computer. After these measurements are made the reference beam is shifted by an optical element e.g. a prism, gaseous wedge, electro-optical diffraction device placed in the reference optical path and a second set of measurements is made. In this way a reference field whose spatial distribution is not known precisely is introduced but the system is such that the reference spatial distribution information is used and then eliminated from the information finally obtained on the unknown wavefield.

REFERENCES:
patent: 3218916 (1965-11-01), Saunders
patent: 3694088 (1972-09-01), Gallagher et al.

Affiliated with

Also associated with

Rating

Method and apparatus to determine spatial distribution of magnit 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 to determine spatial distribution of magnit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to determine spatial distribution of magnit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-749396