Abstract

Real-time noncontacting distance measurement systems are constructed using photogrammetric principles. The system is used to measure a distance between two points specified by sharp visible contrast change under optical illumination. Tests of the system indicate that it can measure the distance with a repeatability of better than one part in 104.

© 1976 Optical Society of America

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References

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  1. H. Takasaki, Appl. Opt. 12, 4, 845 (1973).
  2. E. Marom, T. Sawatari, R. K. Mueller, in Proceedings of Symposium on Application of Holography in Mechanics, 36, USC, Los Angeles, Calif., Aug. 1971.
  3. A. D. Gara, R. F. Majkowski, T. T. Stapleton, Appl. Opt. 12, 9, 2172 (1973).
  4. G. D. Chapman, Appl. Opt. 13, 7, 1646 (1974).
  5. J. H. McLeod, J. Opt. Soc. Am. 50, 166 (1960).

1974

G. D. Chapman, Appl. Opt. 13, 7, 1646 (1974).

1973

H. Takasaki, Appl. Opt. 12, 4, 845 (1973).

A. D. Gara, R. F. Majkowski, T. T. Stapleton, Appl. Opt. 12, 9, 2172 (1973).

1960

Chapman, G. D.

G. D. Chapman, Appl. Opt. 13, 7, 1646 (1974).

Gara, A. D.

A. D. Gara, R. F. Majkowski, T. T. Stapleton, Appl. Opt. 12, 9, 2172 (1973).

Majkowski, R. F.

A. D. Gara, R. F. Majkowski, T. T. Stapleton, Appl. Opt. 12, 9, 2172 (1973).

Marom, E.

E. Marom, T. Sawatari, R. K. Mueller, in Proceedings of Symposium on Application of Holography in Mechanics, 36, USC, Los Angeles, Calif., Aug. 1971.

McLeod, J. H.

Mueller, R. K.

E. Marom, T. Sawatari, R. K. Mueller, in Proceedings of Symposium on Application of Holography in Mechanics, 36, USC, Los Angeles, Calif., Aug. 1971.

Sawatari, T.

E. Marom, T. Sawatari, R. K. Mueller, in Proceedings of Symposium on Application of Holography in Mechanics, 36, USC, Los Angeles, Calif., Aug. 1971.

Stapleton, T. T.

A. D. Gara, R. F. Majkowski, T. T. Stapleton, Appl. Opt. 12, 9, 2172 (1973).

Takasaki, H.

H. Takasaki, Appl. Opt. 12, 4, 845 (1973).

Appl. Opt.

H. Takasaki, Appl. Opt. 12, 4, 845 (1973).

A. D. Gara, R. F. Majkowski, T. T. Stapleton, Appl. Opt. 12, 9, 2172 (1973).

G. D. Chapman, Appl. Opt. 13, 7, 1646 (1974).

J. Opt. Soc. Am.

Other

E. Marom, T. Sawatari, R. K. Mueller, in Proceedings of Symposium on Application of Holography in Mechanics, 36, USC, Los Angeles, Calif., Aug. 1971.

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Figures (3)

Fig. 1
Fig. 1

Schematic of direct imaging system. AE, angle encoder; RM, rotating mirror; ID, imaging device; IS, illumination system; and O, object.

Fig. 2
Fig. 2

Schematic of electronic process. S, switch; C, counter; and D, display.

Fig. 3
Fig. 3

Mirror mount: (A) sideview and (B) top view CC, corner cube; M, mirror; RA, rotation axis; AB, aluminum cylinder; TS, Teflon sheet; and B, aluminum base.

Tables (1)

Tables Icon

Table I Results of Repeatability Test: 〈Ni〉, Average Reading of Each Angle Encoder; ΔNi,max, Maximum Deviation; and σi, rms of the Reading

Equations (6)

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θ = sin - 1 ( λ N / 2 l 0 )             or N = ( 2 l 0 / λ ) sin θ ,
ρ max = Δ Z × 1 2 F 60 μ m ,
Δ ξ = Δ x + Δ θ · η 0 Δ x + Δ θ · l 0 ,
x = f [ θ 1 ( N 1 ) , θ 2 ( N 2 ) ; R , γ , L ] .
x = j = 0 n ( i = 0 n - j α n - j - i , i · N 1 n - j - i · N 2 i ) ,
[ α n - j - i , i ) ] = [ A k , ( n - j - i , i ) ] - 1 ( x k ) ,

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