Abstract

An extremely versatile double beam vacuum uv system for reflection or transmission studies of gases, liquids, and solids has been designed and built. Its features include extreme linearity, a very flat baseline, high duty factor, stationary images on the detectors, equal pathlengths, low temperature capabilities, and analog and digital output.

© 1972 Optical Society of America

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References

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  1. J. A. R. Samson, Appl. Opt. 6, 403 (1967).
    [CrossRef] [PubMed]
  2. J. A. R. Samson, Techniques of Vacuum Ultraviolet Spectroscopy (Wiley, New York, 1967).
  3. R. G. Newburgh, L. Heroux, H. E. Hinteregger, Appl. Opt. 1, 733 (1962).
    [CrossRef]
  4. J. J. Hopfield, Phys. Rev. 35, 1133 (1930).
    [CrossRef]
  5. T. Huen, G. B. Irani, F. Wooten, Appl. Opt. 10, 552 (1970).
    [CrossRef]
  6. RCA, RCA Technical Manual PT-601963).
  7. D. M. Korn, thesis, UCLA, 1971 (unpublished).
  8. R. G. Schmitt, R. K. Brehm, Appl. Opt. 5, 1111 (1966).
    [CrossRef] [PubMed]

1970 (1)

1967 (1)

1966 (1)

1962 (1)

1930 (1)

J. J. Hopfield, Phys. Rev. 35, 1133 (1930).
[CrossRef]

Appl. Opt. (4)

Phys. Rev. (1)

J. J. Hopfield, Phys. Rev. 35, 1133 (1930).
[CrossRef]

Other (3)

J. A. R. Samson, Techniques of Vacuum Ultraviolet Spectroscopy (Wiley, New York, 1967).

RCA, RCA Technical Manual PT-601963).

D. M. Korn, thesis, UCLA, 1971 (unpublished).

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Figures (5)

Fig. 1
Fig. 1

Schematic diagram of uv sample chamber.

Fig. 2
Fig. 2

Ultraviolet spectrometer logarithmic ratiometer electronics schematic.

Fig. 3
Fig. 3

Ultraviolet electronics waveforms: (a) simplified rendition of A and B channel signals just after the logarithmic amplifiers but before the gating circuitry; (b) waveforms after the gating switches; (c) gated waveforms immediately after the A buffer amplifier and after B inverting amplifier; (d) combined signals after the differential amplifier—this signal is fed into the lock-in; (e) output of the lock-in.

Fig. 4
Fig. 4

Ultraviolet logarithmic ratiometer baseline run superimposed upon a hydrogen lamp spectrum (same scale). Resolution is about 0.8 Å, and the time constant is 1 sec.

Fig. 5
Fig. 5

Reflectivity spectrum of Pb0.91Sn0.09Te as displayed on a Calcomp plot of the data. Data from 4.44 eV to higher energies were obtained on the described uv spectrometer system. Lower energy data were taken on a wavelength modulation spectrometer and a conventional ir spectrometer.

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