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Applied Optics

Applied Optics


  • Vol. 17, Iss. 22 — Nov. 15, 1978
  • pp: 3641–3646

Interferometric measurement of laser fusion targets

B. W. Weinstein and C. D. Hendricks  »View Author Affiliations

Applied Optics, Vol. 17, Issue 22, pp. 3641-3646 (1978)

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We describe techniques for the quantitative interferometric characterization of wall thickness variations of hollow glass microspheres. By using a combination of techniques, one can rapidly form a picture of the total configuration for most defect combinations. These techniques require only very simple calculations and do not involve detailed ray tracing through the sphere. We also show how ray tracing calculation can be done very simply for careful analysis of the interference phenomenon in a perfect sphere. These calculations show that if both a large illumination angle and a large aperture objective are used, the nonparallel illumination causes degradation of both the spatial and the phase resolution of the interferometer. These problems can be overcome by properly aperturing the illumination.

© 1978 Optical Society of America

Original Manuscript: January 30, 1978
Published: November 15, 1978

B. W. Weinstein and C. D. Hendricks, "Interferometric measurement of laser fusion targets," Appl. Opt. 17, 3641-3646 (1978)

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  1. B. W. Weinstein, J. Appl. Phys. 46, 5305 (1975). [CrossRef]
  2. We have found that a glass fiber pulled to a very fine tip (~1 μm) works very well for rolling a glass microsphere on a mirror surface. The fine tip keeps the ball from sticking to the fiber. More recently we have developed a manipulator which provides positive control of the microsphere orientation during inspection. See B. W. Weinstein, C. D. Hendricks, C. M. Ward, D. L. Willenborg, Rev. Sci. Instrum. 49, 870, (1978). [CrossRef] [PubMed]
  3. R. R. Stone, D. W. Gregg, P. C. Souers, J. Appl. Phys. 46, 2693 (1975). [CrossRef]
  4. R. R. Stone, P. C. Souers, G. C. Abell, J. W. Reed, “Light Interference in Hollow Glass Microsphere Laser Targets,” Lawrence Livermore Laboratory, Report UCRL-77487 (1975).
  5. R. R. Stone, P. C. Souers, G. C. Abell, J. W. Reed, Opt. Acta 24, 35 (1977). [CrossRef]

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