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References

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  1. König, Die Fernrohre und Entfernungsmesser, p. 106, Raibaud, Revue d’Optique,  1, p. 481; 1922.
  2. Trans. Opt. Soc. London,  17, p. 93, 1916;Trans. Opt. Soc. London 20, pp. 105-108; 1919.
    [Crossref]
  3. Smith, J.O.S.A.,  2-3, p. 76, 1919.
    [Crossref]
  4. Raibaud, l.c.
  5. Raibaud, l.c.

1919 (1)

Smith, J.O.S.A.,  2-3, p. 76, 1919.
[Crossref]

1916 (1)

Trans. Opt. Soc. London,  17, p. 93, 1916;Trans. Opt. Soc. London 20, pp. 105-108; 1919.
[Crossref]

König,

König, Die Fernrohre und Entfernungsmesser, p. 106, Raibaud, Revue d’Optique,  1, p. 481; 1922.

Raibaud,

Raibaud, l.c.

Raibaud, l.c.

Smith,

Smith, J.O.S.A.,  2-3, p. 76, 1919.
[Crossref]

J.O.S.A. (1)

Smith, J.O.S.A.,  2-3, p. 76, 1919.
[Crossref]

l.c. (2)

Raibaud, l.c.

Raibaud, l.c.

Trans. Opt. Soc. London (1)

Trans. Opt. Soc. London,  17, p. 93, 1916;Trans. Opt. Soc. London 20, pp. 105-108; 1919.
[Crossref]

Other (1)

König, Die Fernrohre und Entfernungsmesser, p. 106, Raibaud, Revue d’Optique,  1, p. 481; 1922.

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Figures (11)

F. 1
F. 1

One form of binocular tester by Zeiss, composed of parallel collimators and parallel telescopes

F. 2
F. 2

Introduction of offset in parallel beams by refraction and by reflections.

F. 3
F. 3

French binocular tester, showing two parallel collimators and a single large projection lens with mirror and ground glass screen.

F. 4
F. 4

Binocular tester with single large collimator lens and single observing lens.

F. 5
F. 5

Diagram showing the optical system of the new tester.

F. 6
F. 6

Binocular tester with large double telescope in position for test.

F. 7
F. 7

Binocular tester, showing observing telescope raised to permit direct observation through the instrument under examination.

F. 8
F. 8

Binocular tester with extension arms in vertical position, testing battery commander’s telescope.

F. 9
F. 9

Binocular tester with extension arms in the horizontal position, testing battery commander’s telescope.

F. 10
F. 10

Appearance of the field of the observing telescope with a binocular under test. The upper image is from the right hand tube. Note the difference in sharpness of the images and the lack of coincidence due to non-parallel emergent beams.

F. 11
F. 11

Diagram of the device for securing parallelism of beams. The dotted portion indicates the second position of the adjuster.