Sage Journals: Discover world-class research

Abstract

New tungsten filament secondary standard lamps are described and also tubular fluorescent secondary standards which, when used in an international photometric and colorimetric interchange, showed good agreement on measurements. Possible improved future changes in the C.I.E. data and the effect these may have on photometric and colorimetric values are indicated New developments in physical photometry and colorimetry are described, including preliminary experience with photon counting techniques as a means of increasing sensitivity. Improved photometric integrator paint is described, as this is now necessary in order to meet the new accuracy requirements. Brief reference is made to colour-rendering properties of light sources in connection with attempts to relate this subjective effect with objective measurements. The future possibility of applying ultrasonic modulation to colour measurement is indicated.

Get full access to this article

View all access options for this article.

References

Winch

G. T.

, J.I.E.E., 96, Pt. II, 452 (1949).

Winch

G. T.

, and Leeds

R. E.

, G.E.C. Journal, 22, No. 4, 232 (1955).

Judd

D. B.

, Jn. Opt. Soc. Amer., 39, No. 11, 945 (1949).

MacAdam

D. L.

, Discussion in Proceedings of C.I.E. (1955).

Wright

W. D.

, Researches in Normal and Detective Colour Vision (Henry Kimpton, London, 1946).

Ishak

J. G. H.

, and Teele

R. P.

, Jn. Opt. Soc. Amer., 44, No. 10, 822 (1954).

Stiles

W. S.

, Physical Society (London) “Young Oration” Year Book, 1955. Optica Acta (December, 1955). Interim report to C.I.E. at Zurich, 1955, of N.P.L. Investigations of Colour Matching. (In course of publication.)

Donaldson

, Proc. Phys. Soc., 59, 554 (1947).

Winch

G. T.

, Instrument Practice, 5, 137 (1951).

10.

Winch

G. T.

, and Young

B. M.

, Illum. Engng. (N.Y.), 50, No. 7, 353 (1955).

11.

Physical Society Exhibition Catalogue, 1955.

12.

Engstrom

R. W.

, Jn. Opt. Soc. Amer., 37, No. 6, 420 (1947).

13.

Yates

G. G.

, Monthly Notices of the Royal Astronomical Society, 108, No. 6, 476 (1948).

14.

Buckley

, Philosophical Mag., 20, 745 (1935).

15.

Middleton

W. K.

, and Sanders

C. L.

, Illum. Engng. (N.Y.), 48, No. 5, 254 (1953).

16.

Winch

G. T.

, G.E.C. Journal, 16, No. 4, 197 (1949).

17.

Winch

G. T.

, and Young

B. M.

, G.E.C. Journal, 18, No. 2 (1951).

18.

Winch

G. T.

, and Young

B. M.

, G.E.C. Journal, 19, No. 4 (1952).

19.

Debye

, and Sears

F. W.

, Proc. Nat. Acad. Sci. (Washington), 18, 409 (1932).

20.

Bergmann

, “Der Ultraschall,” S. Hirzel Verlag, Zurich (1954).

21.

Rosenthal

A. H.

, Jn. Opt. Soc. Amer., 45, No. 9, 751 (1955).

Recent Developments in Photometry and Colorimetry

Abstract

Get full access to this article

References