Abstract

Two methods for calibration and wavelength calculation for echelle spectrograms are discussed. The rough method employing ruler measurements on photographic enlargements has an accuracy of about 1 in 105. The accurate method using comparator measurements of Th standard lines and a computer routine has given an accuracy of 2 in 107 and promises greater precision for spectrograms obtained with modern echelle gratings.

© 1972 Optical Society of America

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References

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  1. N. A. Finkelstein, J. Opt. Soc. Am. 43, 90 (1953).
    [CrossRef]
  2. G. R. Harrison, S. P. Davis, and H. J. Robertson, J. Opt. Soc. Am. 43, 853 (1953).
    [CrossRef]
  3. J. J. McNeill, J. Opt. Soc. Am. 49, 441 (1959).
    [CrossRef]
  4. We have discarded the field lens in front of the Littrow slit because it further complicates the mλ space on the plate and because good focus can be obtained only in its absence.
  5. C. F. Freer, Ph.D. thesis, Clarkson College, 1970; Dissertation Abstr. Intern.312931B (1970) (Univ. Microfilm, Ann Arbor, Mich., Order No. 70-22 582).
  6. F. R. Hickey, M. S. thesis, Clarkson College, 1967.
  7. T. A. Littlefield and A. Wood, J. Opt. Soc. Am. 55, 1509 (1965).
    [CrossRef]
  8. W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U.S.) 69A, 109 (1969).
    [CrossRef]
  9. D. Goorvich, F. P. J. Valero, and A. L. Clua, J. Opt. Soc. Am. 59, 971 (1969).
  10. The range of good focus reported by McNeill (Ref. 3) has been extended by using a flat plate.
  11. J. M. Bennett, J. Opt. Soc. Am. 51, 1133 (1961).
    [CrossRef]
  12. F. L. Moore and S. J. Yarosewick, Appl. Opt. 5, 1465 (1966).
    [CrossRef] [PubMed]
  13. B. Furst, Ph.D. thesis, Clarkson College, 1971; Dissertation Abstr. Intern. 32, 4137B (1972) (Order No. 72–1730).

1969 (2)

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U.S.) 69A, 109 (1969).
[CrossRef]

D. Goorvich, F. P. J. Valero, and A. L. Clua, J. Opt. Soc. Am. 59, 971 (1969).

1966 (1)

1965 (1)

1961 (1)

1959 (1)

1953 (2)

Bennett, J. M.

Clua, A. L.

Davis, S. P.

Finkelstein, N. A.

Freer, C. F.

C. F. Freer, Ph.D. thesis, Clarkson College, 1970; Dissertation Abstr. Intern.312931B (1970) (Univ. Microfilm, Ann Arbor, Mich., Order No. 70-22 582).

Furst, B.

B. Furst, Ph.D. thesis, Clarkson College, 1971; Dissertation Abstr. Intern. 32, 4137B (1972) (Order No. 72–1730).

Goorvich, D.

Harrison, G. R.

Hickey, F. R.

F. R. Hickey, M. S. thesis, Clarkson College, 1967.

Littlefield, T. A.

McNeill, J. J.

Meggers, W. F.

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U.S.) 69A, 109 (1969).
[CrossRef]

Moore, F. L.

Robertson, H. J.

Stanley, R. W.

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U.S.) 69A, 109 (1969).
[CrossRef]

Valero, F. P. J.

Wood, A.

Yarosewick, S. J.

Appl. Opt. (1)

J. Opt. Soc. Am. (6)

J. Res. Natl. Bur. Std. (U.S.) (1)

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U.S.) 69A, 109 (1969).
[CrossRef]

Other (5)

The range of good focus reported by McNeill (Ref. 3) has been extended by using a flat plate.

We have discarded the field lens in front of the Littrow slit because it further complicates the mλ space on the plate and because good focus can be obtained only in its absence.

C. F. Freer, Ph.D. thesis, Clarkson College, 1970; Dissertation Abstr. Intern.312931B (1970) (Univ. Microfilm, Ann Arbor, Mich., Order No. 70-22 582).

F. R. Hickey, M. S. thesis, Clarkson College, 1967.

B. Furst, Ph.D. thesis, Clarkson College, 1971; Dissertation Abstr. Intern. 32, 4137B (1972) (Order No. 72–1730).

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Figures (1)

Fig. 1
Fig. 1

Echelle–quartz-Littrow spectrogram of OH with the O-O band head at the left. Lines of one order of interference form one slanted array.

Tables (1)

Tables Icon

Table I Calibration statistics.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

m λ = a ( sin α + sin ( β + γ ) ) ,
m λ = A + B y + C y 2 + ,
m λ = A + B d / L + C ( d / L ) 2 + .
m λ = A + B ( λ ) d .
λ = B ( λ ) S ,