Abstract

Thin, unbacked, aluminum film filters were used on two extreme ultraviolet (XUV) instruments flown on the Apollo Telescope Mount of Skylab by the Naval Research Laboratory to transmit the XUV radiation while blocking the longer wavelength radiation that would saturate the detector. The requirements placed on these filters—large size, resistance to degradation by high acoustic and vibration fields, and low pinhole transmittances—were far more severe than those placed on any filters previously flown. Special techniques were developed for vacuum evaporation of the aluminum, removal of the films from the substrates, supporting the films and mounting them to obtain finished filters, and storing them so that no degradation took place. A description of these techniques will be given.

© 1977 Optical Society of America

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References

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  1. W. R. Hunter, D. W. Angel, R. Tousey, Appl. Opt. 4, 891 (1965).
    [CrossRef]
  2. W. R. Hunter, in Physics of Thin Films, G. Hass, M. H. Francombe, R. W. Hoffman, Eds. (Academic, New York, 1973), Vol. 7, p. 43.
  3. O. P. Rustgi, J. Opt. Soc. Am. 55, 630 (1965).
    [CrossRef]
  4. D. W. Angel, U.S. Naval Research Laboratory, Washington, D.C.; private communication.
  5. G. N. Steele, in Space Optics, B. J. Thompson, R. R. Shannon, Eds. (National Academy of Sciences, Washington, D.C., 1974), p. 367.
  6. W. R. Hunter, J. D. Purcell, G. N. Steele, Appl. Opt. 12, 1874 (1973).
    [CrossRef] [PubMed]
  7. R. Tousey, Appl. Opt. 16, 825 (1977).
    [PubMed]

1977 (1)

1973 (1)

1965 (2)

Angel, D. W.

W. R. Hunter, D. W. Angel, R. Tousey, Appl. Opt. 4, 891 (1965).
[CrossRef]

D. W. Angel, U.S. Naval Research Laboratory, Washington, D.C.; private communication.

Hunter, W. R.

W. R. Hunter, J. D. Purcell, G. N. Steele, Appl. Opt. 12, 1874 (1973).
[CrossRef] [PubMed]

W. R. Hunter, D. W. Angel, R. Tousey, Appl. Opt. 4, 891 (1965).
[CrossRef]

W. R. Hunter, in Physics of Thin Films, G. Hass, M. H. Francombe, R. W. Hoffman, Eds. (Academic, New York, 1973), Vol. 7, p. 43.

Purcell, J. D.

Rustgi, O. P.

Steele, G. N.

W. R. Hunter, J. D. Purcell, G. N. Steele, Appl. Opt. 12, 1874 (1973).
[CrossRef] [PubMed]

G. N. Steele, in Space Optics, B. J. Thompson, R. R. Shannon, Eds. (National Academy of Sciences, Washington, D.C., 1974), p. 367.

Tousey, R.

Appl. Opt. (3)

J. Opt. Soc. Am. (1)

Other (3)

D. W. Angel, U.S. Naval Research Laboratory, Washington, D.C.; private communication.

G. N. Steele, in Space Optics, B. J. Thompson, R. R. Shannon, Eds. (National Academy of Sciences, Washington, D.C., 1974), p. 367.

W. R. Hunter, in Physics of Thin Films, G. Hass, M. H. Francombe, R. W. Hoffman, Eds. (Academic, New York, 1973), Vol. 7, p. 43.

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Figures (5)

Fig. 1
Fig. 1

Summary of the transmitting windows of various metals in the XUV. The arrowheads indicate the critical wavelengths and the vertical lines represent absorption edges. Solid lines indicate observations, and dashed lines represent probable trends.

Fig. 2
Fig. 2

Vacuum evaporation apparatus used by Steele.5

Fig. 3
Fig. 3

Apparatus used by Steele5 to position and cement aluminum foil to filter frames.

Fig. 4
Fig. 4

Three large ATM filters after acoustic testing. The upper filter had no margining, the center filter was margined on the long sides only, and the bottom filter was completely margined.

Fig. 5
Fig. 5

Construction and mounting of a large (10 cm × 10 cm aperture) ATM filter for use on the XUV monitor.

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