Abstract

The relative spectral power distribution and correlated color temperature of the visible radiation from a tungsten filament lamp have been measured by a radiometric comparison with thermopiles of known spectral responsivity making use of a series of glass filters transmitting in different spectral bands. The method is independent of Planck’s formula and the temperature scale.

© 1971 Optical Society of America

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References

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  1. J. R. Moore, Colour Measurement in Industry (Symposium) (The Colour Group, London, 1967), p. 123.
  2. R. Stair, R. G. Johnston, E. W. Halbach, J. Res. Nat. Bur. Stand. 64A, 291 (1960).
    [CrossRef]
  3. J. Bonhoure, CIPM Consultative Committee on Photometry (Gauthier-Villars, Paris, 1965), pp. 47–65.
  4. Commission Internationale de L’Eclairage, Report on the International Intercomparison of Photometric and Colorimetric Measurements on Fluorescent Lamps (1963).
    [PubMed]
  5. O. C. Jones, G. W. Gordon-Smith, A comparison of the NPL colour-temperature and luminance-temperature scales at TC = 2854 K, NPL Optical Metrology Report 10 (December1970).
  6. G. Wyszecki, J. Opt. Soc. Am. 50, 992 (1960).
    [CrossRef]
  7. G. P. Brouwer, Philips Res. Rept. 18, 361 (1963).
  8. J. C. De Vos, Physica 20, 690 (1954).
    [CrossRef]

1963

Commission Internationale de L’Eclairage, Report on the International Intercomparison of Photometric and Colorimetric Measurements on Fluorescent Lamps (1963).
[PubMed]

G. P. Brouwer, Philips Res. Rept. 18, 361 (1963).

1960

G. Wyszecki, J. Opt. Soc. Am. 50, 992 (1960).
[CrossRef]

R. Stair, R. G. Johnston, E. W. Halbach, J. Res. Nat. Bur. Stand. 64A, 291 (1960).
[CrossRef]

1954

J. C. De Vos, Physica 20, 690 (1954).
[CrossRef]

Bonhoure, J.

J. Bonhoure, CIPM Consultative Committee on Photometry (Gauthier-Villars, Paris, 1965), pp. 47–65.

Brouwer, G. P.

G. P. Brouwer, Philips Res. Rept. 18, 361 (1963).

De Vos, J. C.

J. C. De Vos, Physica 20, 690 (1954).
[CrossRef]

Gordon-Smith, G. W.

O. C. Jones, G. W. Gordon-Smith, A comparison of the NPL colour-temperature and luminance-temperature scales at TC = 2854 K, NPL Optical Metrology Report 10 (December1970).

Halbach, E. W.

R. Stair, R. G. Johnston, E. W. Halbach, J. Res. Nat. Bur. Stand. 64A, 291 (1960).
[CrossRef]

Johnston, R. G.

R. Stair, R. G. Johnston, E. W. Halbach, J. Res. Nat. Bur. Stand. 64A, 291 (1960).
[CrossRef]

Jones, O. C.

O. C. Jones, G. W. Gordon-Smith, A comparison of the NPL colour-temperature and luminance-temperature scales at TC = 2854 K, NPL Optical Metrology Report 10 (December1970).

Moore, J. R.

J. R. Moore, Colour Measurement in Industry (Symposium) (The Colour Group, London, 1967), p. 123.

Stair, R.

R. Stair, R. G. Johnston, E. W. Halbach, J. Res. Nat. Bur. Stand. 64A, 291 (1960).
[CrossRef]

Wyszecki, G.

J. Opt. Soc. Am.

J. Res. Nat. Bur. Stand.

R. Stair, R. G. Johnston, E. W. Halbach, J. Res. Nat. Bur. Stand. 64A, 291 (1960).
[CrossRef]

Philips Res. Rept.

G. P. Brouwer, Philips Res. Rept. 18, 361 (1963).

Physica

J. C. De Vos, Physica 20, 690 (1954).
[CrossRef]

Report on the International Intercomparison of Photometric and Colorimetric Measurements on Fluorescent Lamps

Commission Internationale de L’Eclairage, Report on the International Intercomparison of Photometric and Colorimetric Measurements on Fluorescent Lamps (1963).
[PubMed]

Other

O. C. Jones, G. W. Gordon-Smith, A comparison of the NPL colour-temperature and luminance-temperature scales at TC = 2854 K, NPL Optical Metrology Report 10 (December1970).

J. Bonhoure, CIPM Consultative Committee on Photometry (Gauthier-Villars, Paris, 1965), pp. 47–65.

J. R. Moore, Colour Measurement in Industry (Symposium) (The Colour Group, London, 1967), p. 123.

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Figures (4)

Fig. 1
Fig. 1

Layout of the optical system.

Fig. 2
Fig. 2

Spectral transmittance curves for the five filters [Tn(λ)].

Fig. 3
Fig. 3

Distribution of temperature over the surface of the tungsten ribbon lamp filament.

Fig. 4
Fig. 4

Curves showing the ratio of the spectral power distribution of the lamp to that of a gray body [f(λ)]. Results from the present determination are shown together with results obtained from the cavity radiator comparison and results calculated from published emissivity data. The relative levels of the three curves have been adjusted to facilitate comparison.

Tables (1)

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Table I Components of the Five Multielement Glass Filters

Equations (9)

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R n = P 1 ( λ ) t n ( λ ) S ( λ ) d λ ,
k ( λ ) = [ P 1 ( λ ) t 0 ( λ ) ] / P 2 ( λ ) ,
R n = P 2 ( λ ) k ( λ ) T n ( λ ) S ( λ ) d λ
T n ( λ ) = k ( λ ) T n ( λ ) S ( λ ) .
P 2 ( λ ) = J ( λ T ) ( a 0 + a 1 λ + a 2 λ 2 + a 3 λ 3 )
P 2 ( λ ) = J ( λ T C ) f ( λ ) ,
f ( λ ) = 1 + a 1 λ + a 2 λ 2 + a 3 λ 3 .
P ( λ ) = K J ( λ T C ) f ( λ ) = J ( λ T W ) ( λ ) .
f ( λ ) = [ J ( λ T W ) ( λ ) ] / J ( λ T C ) .

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