Abstract

It is shown apparently for the first time how dispersion of birefringence (retardation, phase difference or ellipticity) can be measured through the visible spectrum by the use of a Martens type of polarization photometer and monochromator. Dispersion curves are given for several organic thermoplastic sheets including those with both normal and abnormal dispersion of birefringence, and possible uses for such sheets are suggested.

© 1949 Optical Society of America

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References

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  1. A. Ehringhaus, Neues Jahrb. Mineral. Geol. Beilage B. 43, 557–618 (1920).
  2. E. Perucca, Atti Accad. Sci. Torino,  54, 1013–34 (1918).
  3. L. Longchambon, Bull. Soc. Franç. Phys. No. 195, 158 (1924).
  4. C. Gaudefroy, Comptes Rendus 1891289–91 (1929);Bull. Soc. Franç. Min. 52, 147–60 (1929).
  5. A. Ehringhaus, U. S. Patent1,926,716 (1933);Zeits. f. Krist. 75, 179–95 (1930).
  6. (a)M. Wachtler, Kolloidchem. Beihefte 20, 157 (1924);Zeits. f. tech. Physik 5, 418 (1924).(b) Ramspeck, Ann. d. Physik 74, 722 (1924).(c) Savur, Proc. Roy. Soc. (London) A109, 338 (1925).(d) Derksen, Katz, Hess, and Trogus, Zeits. f. Physik. Chemie 149, 371 (1930).(e) Harris and Seth, Proc. Phys. Soc. (London) 48, 477 (1936).
    [Crossref]
  7. G. Szivessy, Handbuch der Physik (1928), Vol. 19, Chapter 28.
  8. M. Grabau, J. Opt. Soc. Am. 27, 420–24 (1937).
    [Crossref]
  9. Destrian and Prouteau, J. de phys. et rad. 10, 53–55 (1949).
    [Crossref]

1949 (1)

Destrian and Prouteau, J. de phys. et rad. 10, 53–55 (1949).
[Crossref]

1937 (1)

1929 (1)

C. Gaudefroy, Comptes Rendus 1891289–91 (1929);Bull. Soc. Franç. Min. 52, 147–60 (1929).

1924 (2)

(a)M. Wachtler, Kolloidchem. Beihefte 20, 157 (1924);Zeits. f. tech. Physik 5, 418 (1924).(b) Ramspeck, Ann. d. Physik 74, 722 (1924).(c) Savur, Proc. Roy. Soc. (London) A109, 338 (1925).(d) Derksen, Katz, Hess, and Trogus, Zeits. f. Physik. Chemie 149, 371 (1930).(e) Harris and Seth, Proc. Phys. Soc. (London) 48, 477 (1936).
[Crossref]

L. Longchambon, Bull. Soc. Franç. Phys. No. 195, 158 (1924).

1920 (1)

A. Ehringhaus, Neues Jahrb. Mineral. Geol. Beilage B. 43, 557–618 (1920).

1918 (1)

E. Perucca, Atti Accad. Sci. Torino,  54, 1013–34 (1918).

Destrian,

Destrian and Prouteau, J. de phys. et rad. 10, 53–55 (1949).
[Crossref]

Ehringhaus, A.

A. Ehringhaus, Neues Jahrb. Mineral. Geol. Beilage B. 43, 557–618 (1920).

A. Ehringhaus, U. S. Patent1,926,716 (1933);Zeits. f. Krist. 75, 179–95 (1930).

Gaudefroy, C.

C. Gaudefroy, Comptes Rendus 1891289–91 (1929);Bull. Soc. Franç. Min. 52, 147–60 (1929).

Grabau, M.

Longchambon, L.

L. Longchambon, Bull. Soc. Franç. Phys. No. 195, 158 (1924).

Perucca, E.

E. Perucca, Atti Accad. Sci. Torino,  54, 1013–34 (1918).

Prouteau,

Destrian and Prouteau, J. de phys. et rad. 10, 53–55 (1949).
[Crossref]

Szivessy, G.

G. Szivessy, Handbuch der Physik (1928), Vol. 19, Chapter 28.

Wachtler, M.

(a)M. Wachtler, Kolloidchem. Beihefte 20, 157 (1924);Zeits. f. tech. Physik 5, 418 (1924).(b) Ramspeck, Ann. d. Physik 74, 722 (1924).(c) Savur, Proc. Roy. Soc. (London) A109, 338 (1925).(d) Derksen, Katz, Hess, and Trogus, Zeits. f. Physik. Chemie 149, 371 (1930).(e) Harris and Seth, Proc. Phys. Soc. (London) 48, 477 (1936).
[Crossref]

Atti Accad. Sci. Torino (1)

E. Perucca, Atti Accad. Sci. Torino,  54, 1013–34 (1918).

Bull. Soc. Franç. Phys. No. (1)

L. Longchambon, Bull. Soc. Franç. Phys. No. 195, 158 (1924).

Comptes Rendus (1)

C. Gaudefroy, Comptes Rendus 1891289–91 (1929);Bull. Soc. Franç. Min. 52, 147–60 (1929).

J. de phys. et rad. (1)

Destrian and Prouteau, J. de phys. et rad. 10, 53–55 (1949).
[Crossref]

J. Opt. Soc. Am. (1)

Kolloidchem. Beihefte (1)

(a)M. Wachtler, Kolloidchem. Beihefte 20, 157 (1924);Zeits. f. tech. Physik 5, 418 (1924).(b) Ramspeck, Ann. d. Physik 74, 722 (1924).(c) Savur, Proc. Roy. Soc. (London) A109, 338 (1925).(d) Derksen, Katz, Hess, and Trogus, Zeits. f. Physik. Chemie 149, 371 (1930).(e) Harris and Seth, Proc. Phys. Soc. (London) 48, 477 (1936).
[Crossref]

Neues Jahrb. Mineral. Geol. Beilage B. (1)

A. Ehringhaus, Neues Jahrb. Mineral. Geol. Beilage B. 43, 557–618 (1920).

Other (2)

G. Szivessy, Handbuch der Physik (1928), Vol. 19, Chapter 28.

A. Ehringhaus, U. S. Patent1,926,716 (1933);Zeits. f. Krist. 75, 179–95 (1930).

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Figures (4)

F. 1
F. 1

Optical system for measurement of phase differences.

F. 2a
F. 2a

Curves of normal dispersion of phase difference.

F. 2b
F. 2b

Abnormal dispersions.

F. 2c
F. 2c

Achromatic dispersions.

Tables (2)

Tables Icon

Table I Description of Samples

Tables Icon

Table II Variation of N value with composition.

Equations (3)

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N = 589 486 656 = 3.46 .
Δ n = Γ t = x λ t = δ 2 π λ t ,
N = N 1 N 2 ( Γ 1 ± Γ 2 ) N 2 Γ 1 ± N 1 Γ 2 = 3.46 .