Abstract

The paper describes an interference refractometer for liquids and gases which operates automatically and reads out in digital or analog form. A compensating technique using white light is used for measurement. Zero adjustment is achieved by rotating the compensator and capturing the zero-order white light fringe by photoelectric means. Measurement of the path difference compensated by the compensator is based on electronic interpolation and counting of interference fringes by optointerferometric means, a time division multiplex technique with pulse amplitude modulation being used to obtain the electrical fringe signals.

© 1968 Optical Society of America

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References

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  1. W. Kinder, Deutsches Bundes Patent1,100, 325 (1958).
  2. S. Namba, Rev. Sci. Instr. 30, 642 (1959).
    [CrossRef]
  3. E. R. Peck, B. N. Khanna, J. Opt. Soc. Am. 56, 1059 (1966).
    [CrossRef]
  4. W. Kinder, Optik 24, 323 (1966/67).
  5. G. Hansen, Deutsches Bundes Patent1,075, 861 (1956).
  6. T. S. Kolomiitsova, I. V. Novikova, Opt. Spectry. 8, 189 (1960).
  7. R. Torge, Z. Instrumentenk. 75, 155 (1967).

1967 (1)

R. Torge, Z. Instrumentenk. 75, 155 (1967).

1966 (1)

1960 (1)

T. S. Kolomiitsova, I. V. Novikova, Opt. Spectry. 8, 189 (1960).

1959 (1)

S. Namba, Rev. Sci. Instr. 30, 642 (1959).
[CrossRef]

Hansen, G.

G. Hansen, Deutsches Bundes Patent1,075, 861 (1956).

Khanna, B. N.

Kinder, W.

W. Kinder, Optik 24, 323 (1966/67).

W. Kinder, Deutsches Bundes Patent1,100, 325 (1958).

Kolomiitsova, T. S.

T. S. Kolomiitsova, I. V. Novikova, Opt. Spectry. 8, 189 (1960).

Namba, S.

S. Namba, Rev. Sci. Instr. 30, 642 (1959).
[CrossRef]

Novikova, I. V.

T. S. Kolomiitsova, I. V. Novikova, Opt. Spectry. 8, 189 (1960).

Peck, E. R.

Torge, R.

R. Torge, Z. Instrumentenk. 75, 155 (1967).

J. Opt. Soc. Am. (1)

Opt. Spectry. (1)

T. S. Kolomiitsova, I. V. Novikova, Opt. Spectry. 8, 189 (1960).

Optik (1)

W. Kinder, Optik 24, 323 (1966/67).

Rev. Sci. Instr. (1)

S. Namba, Rev. Sci. Instr. 30, 642 (1959).
[CrossRef]

Z. Instrumentenk. (1)

R. Torge, Z. Instrumentenk. 75, 155 (1967).

Other (2)

W. Kinder, Deutsches Bundes Patent1,100, 325 (1958).

G. Hansen, Deutsches Bundes Patent1,075, 861 (1956).

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Figures (3)

Fig. 1
Fig. 1

Recognition logic for zero-order fringes.

Fig. 2
Fig. 2

Interferometer with compensator for digitizing fringe shift, 1—mirror, 2—chamber, 3—compensator, 4—Kösters prism, 5—pencil of rays.

Fig. 3
Fig. 3

Digital assembly for counting and interpolating fringes.

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