Patent
1986-12-05
1989-11-07
Bovernick, Rodney B.
350 372, 350 37, G02B 532
Patent
active
048787183
ABSTRACT:
A method for producing desired changes in a beam of coherent light radiating at .lambda..sub.1, comprising the steps of (a) splitting a beam of coherent light radiating at .lambda..sub.1, correcting one of the beams to achieve a desired wavefront and recombining this beam with the first, where a record medium (I) is placed such that the beams are separated by an angle determined by Bragg's law and the line spacing of the interference pattern formed by the two beams; (b) developing the first medium such that a diffraction grating of spacing d.sub.1 is recorded in a material, specifically sensitive to .lambda..sub.1, which will become the master; (c) illuminating the master with a second wavelength, .lambda..sub.2, selected by choice of a second medium which possesses very high diffraction efficiency. The second beam is split into two parts. The first is directed to the master. This diffracted order is recombined with the second beam. These beams are separated by an angle determined by Bragg's law and the line spacing of the interference pattern formed by the two beams. The record of the second medium (II) is placed at this juncture. A second grating with grating spacing d.sub.2 is recorded in this medium containing a record of the first hologram diffracted from the master, which forms the working hologram; and (d) illuminating the working hologram with the original beam at .lambda..sub.1 at an incidnece angle specific to the grating spacing d.sub.2 and .lambda..sub.1, wherein the desired wavefront at .lambda..sub.1 is diffracted.
REFERENCES:
patent: 3838903 (1974-10-01), Leith et al.
patent: 4355858 (1982-10-01), Funato et al.
W. H. Carter & J. J. Caulfield, "Hologram Laser-Beam Corrector and Combiner or a Satellite Data Link", Applied Optics, vol. 24, No. 14, 15 Jul. 85, pp. 2150-2155.
C. Gilbreath-Frandsen et al., "Some Research Toward the Development of a Hologram Laser Beam Corrector-Collimator for Use in a Satellite Data Link", SPIE, vol. 600, Progress in Holographic Applications, (1985), pp. 81-88.
Lin, L. H. et al., "Effective and Aberration-Free Wave Front Reconstruction from Holograms Illuminated at Wavelengths Differing from the Forming Wavelength", Applied Optics, vol. 10, No. 6, 1314-1318, Jun. 1971.
Dickson, L. D. et al., "Holography in the IBM 3687, Supermarket Scanner", I.B.M. J. Res. Dev., vol 26, No. 2, Mar. 1982, pp. 228-234.
G. C. Gilbreath and A. E. Clement, "Absorption Holograms Made with Mode-Stabilized Laser Diodes for Use in a Satellite Communications Link", Optics Letters, vol. 12, No. 9, Sep. 1987.
Gilbreath-Frandsen C.
Wagner James W.
Bovernick Rodney B.
McDonnell Thomas E.
Miles Edward F.
Ryan J. Patrick
Spevack A. David
LandOfFree
Method for holographic correction of beams of coherent light 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 for holographic correction of beams of coherent light, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for holographic correction of beams of coherent light will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-79305