Abstract

This paper reports the development of a new type of interferometer capable of measuring optical path differences of λ/1000 or less. Experiments that verify this capability were performed and are reported. The interferometer exhibits, in addition to a high sensitivity, an advantage of increased environmental stability over more conventional interferometers which depend upon optical path changes manifested as fringe shifts.

© 1967 Optical Society of America

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References

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  1. R. W. Ditchburn, Light (Interscience Publishers, New York, 1963), Vol. 1, Chapter IX.
  2. G. E. Bowie, Appl. Opt. 2, 1061 (1962).
    [CrossRef]
  3. S. Tolansky, Appl. Opt. 4, 727 (1965).
    [CrossRef]
  4. A. I. Akimov, G. I. Kromskii, I. V. Shoicov, Instr. Exptl. Tech. No. 5, 1098 (1964).

1965

1964

A. I. Akimov, G. I. Kromskii, I. V. Shoicov, Instr. Exptl. Tech. No. 5, 1098 (1964).

1962

Akimov, A. I.

A. I. Akimov, G. I. Kromskii, I. V. Shoicov, Instr. Exptl. Tech. No. 5, 1098 (1964).

Bowie, G. E.

Ditchburn, R. W.

R. W. Ditchburn, Light (Interscience Publishers, New York, 1963), Vol. 1, Chapter IX.

Kromskii, G. I.

A. I. Akimov, G. I. Kromskii, I. V. Shoicov, Instr. Exptl. Tech. No. 5, 1098 (1964).

Shoicov, I. V.

A. I. Akimov, G. I. Kromskii, I. V. Shoicov, Instr. Exptl. Tech. No. 5, 1098 (1964).

Tolansky, S.

Appl. Opt.

Instr. Exptl. Tech. No. 5

A. I. Akimov, G. I. Kromskii, I. V. Shoicov, Instr. Exptl. Tech. No. 5, 1098 (1964).

Other

R. W. Ditchburn, Light (Interscience Publishers, New York, 1963), Vol. 1, Chapter IX.

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Figures (5)

Fig. 1
Fig. 1

Sketch of three-aperture interferometer.

Fig. 2
Fig. 2

Typical interference patterns: (a) Δ = 0 and (b) Δ ~ odd multiple of λ/4.

Fig. 3
Fig. 3

(a) Eexperimental arrangement. (b) Chamber used to produce optical path variations.

Fig. 4
Fig. 4

Typical oscilloscope traces (a) pressure change Δp = 1.40 mm of water equivalent to Δ = 0.0036 λ. (b) Δp = 8.6 mm or Δ = 0.0022 λ, (c) Δp = 4.6 mm or Δ = 0.0012 λ.

Fig. 5
Fig. 5

Osilloscope response vs change in Optical path. (a) First series (seventeen observations: Y = 55 + 233 x, sy = 52 mV. (b) Second series (thirty-three observations): Y = 35 + 228 x, sy = 51 mV, Where x = 1 corressponds to Δ = λ/1000.

Equations (5)

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I ( x , y ) [ 2 J 1 ( β ) / β ] 2 ( 1 + 4 cos γ + 4 cos 2 γ ) ,
ψ = a e i k Δ ,
I ( x , y ) [ 2 J 1 ( β ) / β ] 2 ( a 2 + 4 a cos γ cos η + 4 cos 2 γ ) ,
η = π / 2 and 2 L = λ f / 2 l .
S ( η ) = S 0 [ 3 - ( 8 sin η ) / π ] ,

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