Photoelectric intensity ratio meter as receiver for the phase contrast refractometer

Applied Scientific Research - Tập 4 - Trang 91-99 - 1955
Erik Djurle1
1Optics Laboratory, The Royal Institute of Technology, Stockholm 70, Sweden

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.