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References

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  1. P. G. Nutting, Astrophys. Jour. 40, p. 33–42, 1914;R. W. Cheshire, Proc. Opt. Con., p. 34–40, 1912.
    [Crossref]

1914 (1)

P. G. Nutting, Astrophys. Jour. 40, p. 33–42, 1914;R. W. Cheshire, Proc. Opt. Con., p. 34–40, 1912.
[Crossref]

Nutting, P. G.

P. G. Nutting, Astrophys. Jour. 40, p. 33–42, 1914;R. W. Cheshire, Proc. Opt. Con., p. 34–40, 1912.
[Crossref]

Astrophys. Jour. (1)

P. G. Nutting, Astrophys. Jour. 40, p. 33–42, 1914;R. W. Cheshire, Proc. Opt. Con., p. 34–40, 1912.
[Crossref]

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Figures (5)

F. 1
F. 1

Photographic illumination by lens.

F. 2
F. 2

Photographic illumination by sensitometer.

F. 3
F. 3

Constant intensity continuous exposure sensitometer.

F. 4
F. 4

Lamp house end of sensitometer

F. 5
F. 5

Plate exposing end of sensitometer.

Equations (8)

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d L = I 0 d S 0 cos 2 U × 2 π r d r r 2 + ( u + d ) 2
L = π I 0 d S 0 sin 2 U .
I 1 = π I 0 sin 2 U Y 2
I 1 = π I 0 4 S 2
d L = 2 π r I 0 d r cos 2 θ r 2 + l 2 = 2 π I 0 l 2 r d r ( r 2 + l 2 ) 2
I s = π I 0 R 2 R 2 + l 2
I 1 t 1 = I s t s , I 1 = π I 0 R 2 R 2 + I 2 × t s t 1
T = I 1 I = π I 0 R 2 R 2 + l 2 × t s t 1 π I 0 sin 2 U Y 2 = t s t 1 × R 2 Y 2 ( R 2 + l 2 ) sin 2 U = t s t 1 × R 2 R 2 + l 2 ( Y 2 + [ Y ( f + d ) + f ] 2 h 2 ) .