Abstract

A simple device has been constructed to record accurately the parallelism of optically contacted Fabry-Perots immediately after their manufacture. In this a Fabry-Perot fringe is tuned to be a maximum on-axis by varying the pressure of the gas in which the etalon is emersed. An insect-eye lens is then used to photograph the different fringe patterns from a large number of separate small areas of the Fabry-Perot simultaneously.

© 1976 Optical Society of America

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References

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  1. B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
    [Crossref]
  2. G. Courtès, C. Fehrenbach, E. Hughes, J. Romand. Appl. Opt. 5, 1349 (1966).
    [Crossref] [PubMed]
  3. J. Meaburn, Appl. Opt. 14, 465 (1975).
    [Crossref] [PubMed]
  4. P. Jacquinot, J. Opt. Soc. Am. 44, 761 (1954).
    [Crossref]
  5. P. Jacquinot, Rep. Prog. Phys. 24, 267 (1960).
    [Crossref]

1975 (1)

1966 (2)

B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
[Crossref]

G. Courtès, C. Fehrenbach, E. Hughes, J. Romand. Appl. Opt. 5, 1349 (1966).
[Crossref] [PubMed]

1960 (1)

P. Jacquinot, Rep. Prog. Phys. 24, 267 (1960).
[Crossref]

1954 (1)

Bates, B.

B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
[Crossref]

Bradley, D. J.

B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
[Crossref]

Courtès, G.

Fehrenbach, C.

Hughes, E.

Jacquinot, P.

P. Jacquinot, Rep. Prog. Phys. 24, 267 (1960).
[Crossref]

P. Jacquinot, J. Opt. Soc. Am. 44, 761 (1954).
[Crossref]

Kohno, T.

B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
[Crossref]

Meaburn, J.

Romand, J.

Yates, H. W.

B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
[Crossref]

Appl. Opt. (2)

J. Opt. Soc. Am. (1)

J. Sci. Instrum. (1)

B. Bates, D. J. Bradley, T. Kohno, H. W. Yates, J. Sci. Instrum. 43, 476 (1966).
[Crossref]

Rep. Prog. Phys. (1)

P. Jacquinot, Rep. Prog. Phys. 24, 267 (1960).
[Crossref]

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Figures (3)

Fig. 1
Fig. 1

The optical layout of the device is shown. The Fabry-Perot to be measured is on a crude tilter in a pressure chamber. The pressure of nitrogen gas in the chamber can be adjusted up to 4 atm by a VCPI pressure controller.

Fig. 2
Fig. 2

An interferogram of an optically contacted Fabry-Perot with a plate separation of 0.0371 cm and defects less than λ/110 over 48-mm diam at 5087 Å. The reflection finesse is >80.

Fig. 3
Fig. 3

The variations in the gap separation are presented for the etalon whose fringe patterns are shown in Fig. 2. The values shown should be multiplied by 0.0001λ. Then a value of 100 for instance indicates a variation of 0.0100λ (or λ/100) in gap thickness from the zero position at the bottom left of this diagram.

Equations (3)

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2 t 2 cos θ = n λ ,
ϕ = 2 arccos [ t 1 / ( t 1 + Δ t ) ]
ϕ 2 / 8 ( Δ t ) / t 1 .

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