Photoelectric intensity ratio meter as receiver for the phase contrast refractometer
Tóm tắt
The phase contrast refractometer converts optical phase differences into intensity differences, and thus the receiver is a photometer. The present design is photoelectric with one phototube and a grey wedge, an electronic device acting as a null indicator. The ratio between the intensities of the two areas to be measured is accurate to 0.3%, corresponding to a difference in optical path in the phase object of 0.0004 λ.
Tài liệu tham khảo
Ingelstam, E., Ark. Fys.6, No. 29 (1953) 287.
Ingelstam, E., Trans. Instr. Meas. Conf., Stockholm1952, 35.
Ingelstam, E. and L. Johansson, Appl. Sci. Res.B4 (1954) 100.
Terman, F. E., Radio Engineers' Handbook, New York 1943.
Apparatus Model 214, Pamphlet No. Ad. 314, Math.-mech. Institut A. Ott, Kempten-Allgäu, Germany.
Waveforms. M.I.T. Radiation Laboratory Series 19, New York 1949, p. 285.
Barrell, H. and J. E. Sears, Phil. Trans., A238 (1940) 1.