Abstract

Contour moiré pictures with good contrast of a full size living body are now available. Construction problems, performance, and accuracy of large instruments are experimentally studied. Techniques to minimize the drawbacks of the moiré contouring are developed. The system has been proved to be ready for practical application to full size living bodies.

© 1973 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. H. Takasaki, Appl. Opt. 9, 1467 (1970).
    [CrossRef] [PubMed]
  2. P. S. Theocaris, Expt. Mech. 4, 153 (1964).
    [CrossRef]
  3. D. M. Meadows et al., Appl. Opt. 9, 942 (1970).
    [CrossRef] [PubMed]
  4. B. H. Billings et al., J. Opt. Soc. Am. 15, 491 (1925).

1970 (2)

1964 (1)

P. S. Theocaris, Expt. Mech. 4, 153 (1964).
[CrossRef]

1925 (1)

B. H. Billings et al., J. Opt. Soc. Am. 15, 491 (1925).

Billings, B. H.

B. H. Billings et al., J. Opt. Soc. Am. 15, 491 (1925).

Meadows, D. M.

Takasaki, H.

Theocaris, P. S.

P. S. Theocaris, Expt. Mech. 4, 153 (1964).
[CrossRef]

Appl. Opt. (2)

Expt. Mech. (1)

P. S. Theocaris, Expt. Mech. 4, 153 (1964).
[CrossRef]

J. Opt. Soc. Am. (1)

B. H. Billings et al., J. Opt. Soc. Am. 15, 491 (1925).

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

The contour moiré on a full size living body. Camera distance l = 160 cm, light source offset d = 48 cm pitch of the grating s = 1.5 mm, and height difference between two successive fringes was approximately 5 mm. The light source was a 1.5-kW iodine incandescent lamp, and the picture was taken using a 6 × 6 camera with f = 50 mm, F: 11 lens. Exposure is ⅛ sec for tri x film rated ASA 1600.

Fig. 2
Fig. 2

Order determination and perspective correction. S: light source, L: lens, l: vertical distance of L and S from the grating, xN: distance from a calibration line to the intersection point of a contour moiré under consideration and the shadow of the line, hN′: depth of the contour moiré under consideration to be obtained from xN, l, and d.

Fig. 3
Fig. 3

Projection-conversion aid. HM: plane half mirror, M: plane mirror, k: constant

Fig. 4
Fig. 4

Picture of the contour moiré obtained by using two light sources, one giving fine contour and the other coarse contour. The latter is added to the former. The result appears as if the fine contour is modulated by the coarse contour.

Fig. 5
Fig. 5

Arrangement for taking stereo contour moiré pictures. d: distance between light source and the camera, b: base length of stereo camera.

Fig. 6
Fig. 6

Stereo contour moiré picture of a living body. The thread of grating runs horizontally. Height difference of the two successive fringes is approximately 4 mm. The white square is for calibration and is 20 × 20 cm.

Fig. 7
Fig. 7

Examples of two sets of moiré observed by a camera positioned in an appropriate location.

Fig. 8
Fig. 8

Generation of pseudo hyperbolic section. S: light source, L: camera lens, G: grating. The thread of the grating runs horizontally.

Fig. 9
Fig. 9

Example of taking a picture of three-fourths of an all-around view of the contour moiré by using two cameras and a grating. The two marks are origins for perspective correction.

Equations (8)

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

h N = N l / ( d / s - N ) ,
h N = l / ( d / x N - 1 )
x = x ( 1 + h p / l ) , y = y ( 1 + h p / l ) ,
Δ Z = N Z / N ,
N = d / s .
u = u s ( 1 - x / p s ) , u = u c ( 1 - x / q s ) ,
x = N s ( u - u 0 + u s u c / u ) / ( u c - u s ) ,
u 0 = u c + u s .

Metrics