Abstract

The limitations arising from scattered light from lenses and mirrors in a program of daytime astrometry near the sun are discussed. Measurements were made of the angular distribution of the scattered radiance for (1) a coronagraphic lens, (2) a 2.54-cm thick coronagraph quality window, and (3) flat quartz mirrors. Results are also given for the optical elements after they have been exposed in a vacuum for 48 h. The results indicate that the accuracy of a daytime astrometry program would be determined by the shot noise of the scattered light produced by the refracting elements and the sky, each producing equal contributions.

© 1968 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. A. F. Lindemann, F. A. Lindemann, Mon. Not. Roy. Astron. Soc. 77, 140 (1916–17).
  2. B. Lyot, Mon. Not. Roy. Astron. Soc. 99, 580 (1939).
  3. F. E. Volz, Ber. Deut. Wetterdienstes 2, No. 13 (1954).
  4. G. Newkirk, J. Opt. Soc. Amer. 46, 1028 (1956).
    [CrossRef]
  5. G. Newkirk, D. Bohlin, Appl. Opt. 2, 131 (1963).
    [CrossRef]
  6. G. Newkirk, High Altitude Laboratory, Boulder (private communication).
  7. H. Zirin, G. Newkirk, Appl. Opt. 2, 977 (1963).
  8. B. Lyot, C. R. Acad. Sci. Paris 191, 834 (1930).
  9. C. A. Zanoni, H. A. Hill, J. Opt. Soc. Amer. 55, 1608 (1965).
    [CrossRef]

1965

C. A. Zanoni, H. A. Hill, J. Opt. Soc. Amer. 55, 1608 (1965).
[CrossRef]

1963

1956

G. Newkirk, J. Opt. Soc. Amer. 46, 1028 (1956).
[CrossRef]

1954

F. E. Volz, Ber. Deut. Wetterdienstes 2, No. 13 (1954).

1939

B. Lyot, Mon. Not. Roy. Astron. Soc. 99, 580 (1939).

1930

B. Lyot, C. R. Acad. Sci. Paris 191, 834 (1930).

Bohlin, D.

Hill, H. A.

C. A. Zanoni, H. A. Hill, J. Opt. Soc. Amer. 55, 1608 (1965).
[CrossRef]

Lindemann, A. F.

A. F. Lindemann, F. A. Lindemann, Mon. Not. Roy. Astron. Soc. 77, 140 (1916–17).

Lindemann, F. A.

A. F. Lindemann, F. A. Lindemann, Mon. Not. Roy. Astron. Soc. 77, 140 (1916–17).

Lyot, B.

B. Lyot, Mon. Not. Roy. Astron. Soc. 99, 580 (1939).

B. Lyot, C. R. Acad. Sci. Paris 191, 834 (1930).

Newkirk, G.

H. Zirin, G. Newkirk, Appl. Opt. 2, 977 (1963).

G. Newkirk, D. Bohlin, Appl. Opt. 2, 131 (1963).
[CrossRef]

G. Newkirk, J. Opt. Soc. Amer. 46, 1028 (1956).
[CrossRef]

G. Newkirk, High Altitude Laboratory, Boulder (private communication).

Volz, F. E.

F. E. Volz, Ber. Deut. Wetterdienstes 2, No. 13 (1954).

Zanoni, C. A.

C. A. Zanoni, H. A. Hill, J. Opt. Soc. Amer. 55, 1608 (1965).
[CrossRef]

Zirin, H.

Appl. Opt.

Ber. Deut. Wetterdienstes

F. E. Volz, Ber. Deut. Wetterdienstes 2, No. 13 (1954).

C. R. Acad. Sci. Paris

B. Lyot, C. R. Acad. Sci. Paris 191, 834 (1930).

J. Opt. Soc. Amer.

C. A. Zanoni, H. A. Hill, J. Opt. Soc. Amer. 55, 1608 (1965).
[CrossRef]

G. Newkirk, J. Opt. Soc. Amer. 46, 1028 (1956).
[CrossRef]

Mon. Not. Roy. Astron. Soc.

A. F. Lindemann, F. A. Lindemann, Mon. Not. Roy. Astron. Soc. 77, 140 (1916–17).

B. Lyot, Mon. Not. Roy. Astron. Soc. 99, 580 (1939).

Other

G. Newkirk, High Altitude Laboratory, Boulder (private communication).

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 (4)

Fig. 1
Fig. 1

A schematic diagram of the apparatus used to measure the scattered radiance.

Fig. 2
Fig. 2

The angular distribution of the scattered radiance B from a 12.2-m focal length, 2.54-cm thick lens is plotted as a function of the distance from the center of the solar disk in units of the solar radius R. The scattered radiance is plotted in units of the mean solar radiance B. The instrumental contribution has been subtracted out.

Fig. 3
Fig. 3

The angular distribution of the scattered radiance B from a 28-cm diam, 2.54-cm thick window is plotted as a function of the distance from the center of the solar disk in units of the solar radius R. The scattered radiance is plotted in units of the mean solar radiance B. The instrumental contribution has been subtracted out.

Fig. 4
Fig. 4

The angular distribution of the scattered radiance B from an aluminized quartz mirror is plotted as a function of the distance from the center of the solar disk in units of the solar radius R. The scattered radiance is plotted in units of the mean solar radiance B. The instrumental contribution has been subtracted out.

Metrics