Abstract

A knowledge of the emissivity of a cavity radiator may be deduced from reflectance measurements, but these may be difficult to make if the cavity has a small aperture and low reflectance. The use of a He–Ne laser as a source facilitates such measurements. Results are presented for one ceramic and three metallic cavities that have been used in photometric and spectroradoimetric standards work. An integrating sphere method appears more satisfactory than a goniophotometric approach.

© 1971 Optical Society of America

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References

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  1. O. C. Jones, J. S. Preston, NPL Notes on Applied Science 24, (HMSO, 1969), pp. 12–16.
  2. J. R. Moore, Colour Measurement in Industry [The Colour Group (G.B.), 1967], pp. 123–131.
  3. J. C. De Vos, Physica 20, 669 (1954).
    [CrossRef]
  4. A. Gouffé, Rev. Opt. 24, (1945).
  5. T. J. Quinn, Brit. J. Appl. Phys. 18, 1105 (1967).
    [CrossRef]
  6. C. L. Sanders, Metrologia 3, 119 (1967).
    [CrossRef]
  7. D. Paulmier, J. Gosse, Compt. Rend. 256, 381 (1963).
  8. T. J. Quinn, C. R. Barber, Metrologia 3, 19 (1967).
    [CrossRef]
  9. S. H. Lin, E. M. Sparrow, Appl. Opt. 4, 277 (1965).
    [CrossRef]
  10. R. P. Heinisch, R. N. Schmidt, Appl. Opt. 9, 1920 (1970).
    [CrossRef] [PubMed]
  11. J. W. T. Walsh, Photometry (Constable, London, 1958), p. 420.
  12. B. J. Hisdahl, J. Opt. Soc. Am. 55, 1122 (1965).
    [CrossRef]
  13. H. F. Meacock, F. A. Garforth, R. G. Shrubsall, J. Sci. Instrum. 39, 384 (1962).
    [CrossRef]
  14. We later examined the tuft from a lamp that had operated for about 100 h. Its reflectance was considerably higher (15%), but the minimal effects of tube temperature gradients still apply. Figure 11 shows the visual comparison of a new tuft (right) and used tuft (left).

1970

1967

T. J. Quinn, C. R. Barber, Metrologia 3, 19 (1967).
[CrossRef]

T. J. Quinn, Brit. J. Appl. Phys. 18, 1105 (1967).
[CrossRef]

C. L. Sanders, Metrologia 3, 119 (1967).
[CrossRef]

1965

1963

D. Paulmier, J. Gosse, Compt. Rend. 256, 381 (1963).

1962

H. F. Meacock, F. A. Garforth, R. G. Shrubsall, J. Sci. Instrum. 39, 384 (1962).
[CrossRef]

1954

J. C. De Vos, Physica 20, 669 (1954).
[CrossRef]

1945

A. Gouffé, Rev. Opt. 24, (1945).

Barber, C. R.

T. J. Quinn, C. R. Barber, Metrologia 3, 19 (1967).
[CrossRef]

De Vos, J. C.

J. C. De Vos, Physica 20, 669 (1954).
[CrossRef]

Garforth, F. A.

H. F. Meacock, F. A. Garforth, R. G. Shrubsall, J. Sci. Instrum. 39, 384 (1962).
[CrossRef]

Gosse, J.

D. Paulmier, J. Gosse, Compt. Rend. 256, 381 (1963).

Gouffé, A.

A. Gouffé, Rev. Opt. 24, (1945).

Heinisch, R. P.

Hisdahl, B. J.

Jones, O. C.

O. C. Jones, J. S. Preston, NPL Notes on Applied Science 24, (HMSO, 1969), pp. 12–16.

Lin, S. H.

Meacock, H. F.

H. F. Meacock, F. A. Garforth, R. G. Shrubsall, J. Sci. Instrum. 39, 384 (1962).
[CrossRef]

Moore, J. R.

J. R. Moore, Colour Measurement in Industry [The Colour Group (G.B.), 1967], pp. 123–131.

Paulmier, D.

D. Paulmier, J. Gosse, Compt. Rend. 256, 381 (1963).

Preston, J. S.

O. C. Jones, J. S. Preston, NPL Notes on Applied Science 24, (HMSO, 1969), pp. 12–16.

Quinn, T. J.

T. J. Quinn, C. R. Barber, Metrologia 3, 19 (1967).
[CrossRef]

T. J. Quinn, Brit. J. Appl. Phys. 18, 1105 (1967).
[CrossRef]

Sanders, C. L.

C. L. Sanders, Metrologia 3, 119 (1967).
[CrossRef]

Schmidt, R. N.

Shrubsall, R. G.

H. F. Meacock, F. A. Garforth, R. G. Shrubsall, J. Sci. Instrum. 39, 384 (1962).
[CrossRef]

Sparrow, E. M.

Walsh, J. W. T.

J. W. T. Walsh, Photometry (Constable, London, 1958), p. 420.

Appl. Opt.

Brit. J. Appl. Phys.

T. J. Quinn, Brit. J. Appl. Phys. 18, 1105 (1967).
[CrossRef]

Compt. Rend.

D. Paulmier, J. Gosse, Compt. Rend. 256, 381 (1963).

J. Opt. Soc. Am.

J. Sci. Instrum.

H. F. Meacock, F. A. Garforth, R. G. Shrubsall, J. Sci. Instrum. 39, 384 (1962).
[CrossRef]

Metrologia

T. J. Quinn, C. R. Barber, Metrologia 3, 19 (1967).
[CrossRef]

C. L. Sanders, Metrologia 3, 119 (1967).
[CrossRef]

Physica

J. C. De Vos, Physica 20, 669 (1954).
[CrossRef]

Rev. Opt.

A. Gouffé, Rev. Opt. 24, (1945).

Other

O. C. Jones, J. S. Preston, NPL Notes on Applied Science 24, (HMSO, 1969), pp. 12–16.

J. R. Moore, Colour Measurement in Industry [The Colour Group (G.B.), 1967], pp. 123–131.

J. W. T. Walsh, Photometry (Constable, London, 1958), p. 420.

We later examined the tuft from a lamp that had operated for about 100 h. Its reflectance was considerably higher (15%), but the minimal effects of tube temperature gradients still apply. Figure 11 shows the visual comparison of a new tuft (right) and used tuft (left).

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