Abstract

A simple technique utilizing a bifurcated fiber light guide for obtaining the reflectivity spectra of specular and diffusely reflecting surfaces is described. The technique can be used in certain situations where conventional reflectometers are not practical.

© 1973 Optical Society of America

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References

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  1. Bifurcated fiber light guide, The Ealing Corporation, Cambridge, Mass.
  2. Model B spectrophotometer, Beckman Instruments, Inc., Fullerton, California.
  3. D. E. Grey, Ed. American Institute of Physics Handbook (McGraw-Hill, New York, 1963).
  4. O. S. Heavens, Optical Properties of Thin Solid Films (Dover, New York, 1955).
  5. W. W. Wendlandt, H. G. Hecht, Reflectance Spectroscopy (Interscience, New York, 1966), p. 268.

Heavens, O. S.

O. S. Heavens, Optical Properties of Thin Solid Films (Dover, New York, 1955).

Hecht, H. G.

W. W. Wendlandt, H. G. Hecht, Reflectance Spectroscopy (Interscience, New York, 1966), p. 268.

Wendlandt, W. W.

W. W. Wendlandt, H. G. Hecht, Reflectance Spectroscopy (Interscience, New York, 1966), p. 268.

Other (5)

Bifurcated fiber light guide, The Ealing Corporation, Cambridge, Mass.

Model B spectrophotometer, Beckman Instruments, Inc., Fullerton, California.

D. E. Grey, Ed. American Institute of Physics Handbook (McGraw-Hill, New York, 1963).

O. S. Heavens, Optical Properties of Thin Solid Films (Dover, New York, 1955).

W. W. Wendlandt, H. G. Hecht, Reflectance Spectroscopy (Interscience, New York, 1966), p. 268.

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Figures (6)

Fig. 1
Fig. 1

Schematic diagram of spectrophotometer–fiber light guide system.

Fig. 2
Fig. 2

Cross section of probe head showing end of light guide positioned on sample surface.

Fig. 3
Fig. 3

Reflectivity spectrum of evaporated copper film relative to aluminum. Data points are measured values, solid curve taken from AIP handbook.

Fig. 4
Fig. 4

Reflectivity spectra of bulk copper surfaces cleaned by various methods: ◆, freshly deposited film; ■, polished disk; ●, chemically cleaned sheet; ▲, HNO3-etched sheet; ▼, as-received sheet.

Fig. 5
Fig. 5

Reflectivity spectra of a bulk copper surface at different times during oxidation in atmosphere at 100°: ●, 0 min; ■, 60 min; ▲, 120 min; ▼, 180 min; ◆, 240 min.

Fig. 6
Fig. 6

Reflectivity spectra of various colored diffusely reflecting paper surfaces: ▼, yellow; ▲, pink; ●, red; ■, green.

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