Abstract

The experimental procedures and precautions required to measure liquid-alloy reflectivities with a cw far infrared (FIR) laser are described. The output of a carefully stabilized optically pumped FIR laser was channeled to a melted sample contained in a silica holder under a He atmosphere. By maintaining specular reflection and alloy homogeneity, reflectivities reproducible to ±7% were routinely obtained.

© 1980 Optical Society of America

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References

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  1. O. A. Simpson, B. L. Bean, S. Perkowitz, J. Opt. Soc. Am. 69, 1723 (1979).
    [Crossref]
  2. B. L. Bean, S. Perkowitz, J. Opt. Soc. Am. 67, 911 (1977).
    [Crossref]
  3. Both detectors are Molectron model P4-43.
  4. Initial tests indicated that nonlinearity or offsetting of the detector signal was not introduced by the blackbody radiation of the furnace.
  5. R. C. Weast, Ed., CRC Handbook of Chemistry and Physics (CRC Press, Cleveland, Ohio, 1973).
  6. S. F. Johnston, E. D. Crozier, B. P. Clayman (to be published).

1979 (1)

1977 (1)

Bean, B. L.

Clayman, B. P.

S. F. Johnston, E. D. Crozier, B. P. Clayman (to be published).

Crozier, E. D.

S. F. Johnston, E. D. Crozier, B. P. Clayman (to be published).

Johnston, S. F.

S. F. Johnston, E. D. Crozier, B. P. Clayman (to be published).

Perkowitz, S.

Simpson, O. A.

Weast, R. C.

R. C. Weast, Ed., CRC Handbook of Chemistry and Physics (CRC Press, Cleveland, Ohio, 1973).

J. Opt. Soc. Am. (2)

Other (4)

Both detectors are Molectron model P4-43.

Initial tests indicated that nonlinearity or offsetting of the detector signal was not introduced by the blackbody radiation of the furnace.

R. C. Weast, Ed., CRC Handbook of Chemistry and Physics (CRC Press, Cleveland, Ohio, 1973).

S. F. Johnston, E. D. Crozier, B. P. Clayman (to be published).

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Figures (4)

Fig. 1
Fig. 1

Block diagram of the experiment.

Fig. 2
Fig. 2

Furnace sample-area detail: (1) stainless steel light pipe; (2) silica stirring rod; (3) silica crucible; (4) boron-nitride cylinder, supporting resistive heater wire; (5) adjustable-height sample support; (6) thermocouple; (7) sample ingot.

Fig. 3
Fig. 3

Solder-metal reflectivity at 84.2 cm−1. Discontinuities represent sample freezing/melting.

Fig. 4
Fig. 4

Liquid Ga1−xTex alloy reflectivity at 84.2 cm−1 and T = 1200 K (927°C). Series I and II represent two sets of alloy samples.

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