Abstract

Basic and practical problems on the formation of fringes in endoscopic hologram interferometry using fiber optics have been studied in connection with medical diagnosis of living body cavities, nondestructive testing of inner parts of machines, etc. It is pointed out that fiber bundles instead of single fibers can be used to transmit high power laser light for object illumination to prevent the light path break induced by the high power density of concentrated laser light. The effects of extended source illumination by the fiber bundle, image transmission through the ordered fiber bundle, and fiber bundle movement on the fringe visibility were investigated.

© 1981 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. D. Hadbawnik, Optik 45, 21 (1976).

1976 (1)

D. Hadbawnik, Optik 45, 21 (1976).

Hadbawnik, D.

D. Hadbawnik, Optik 45, 21 (1976).

Optik (1)

D. Hadbawnik, Optik 45, 21 (1976).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (9)

Fig. 1
Fig. 1

Illumination and observation geometry in hologram interferometry.

Fig. 2
Fig. 2

Dependence of fringe visibility reduction due to in-plane displacement on the extended source illumination.

Fig. 3
Fig. 3

Dependence of allowable in-plane displacement for extended source illumination relative to that for point source illumination on αs/αa.

Fig. 4
Fig. 4

Fringe visibility reduction for in-plane displacement d: (1) 0 μm; (2) 5 μm; (3) 10 μm; (4) 15 μm. (a) Extended source illumination, αs = αa; (b) point source illumination, αs = 0.

Fig. 5
Fig. 5

Reconstructed image from a hologram recorded using a double pulsed ruby laser.

Fig. 6
Fig. 6

Experimental configuration for investigating the effects of image transmission in the fiber bundle on the fringe visibility.

Fig. 7
Fig. 7

Fringes when the image transmission fiber bundle was used for in-plane displacement d: (a) 0 μm; (b) 10 μm; (c) 20 μm; (d) 30 μm.

Fig. 8
Fig. 8

Experimental configuration for investigating the effects of fiber bundle movement on the fringe visibility.

Fig. 9
Fig. 9

Fringes of reconstructed images for translation of the fiber bundle: (a) 0 μm; (b) 200 μm; (c) 300 μm; (d) 500 μm.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

δ = ( a + b ) · d .
d I = c I s L 1 2 L 2 2 { 1 + cos [ k ( a + b ) · d ] } d S d A ,
I = A S c I s L 1 2 L 2 2 { 1 + cos [ k ( a + b ) · d ] } d S d A .
I = c I s S A L 1 2 L 2 2 { 1 + 2 J 1 ( k α s d x 2 + d y 2 ) k α s d x 2 + d y 2 × 2 J 2 ( k α a d x 2 + d y 2 ) k α a d x 2 + d y 2 × cos [ k ( a 0 + b 0 ) · d ] } ,
V = 2 J 1 ( k α s D ) k α s D · 2 J 1 ( k α a D ) k α a D ,

Metrics