Interferometer

Details Interferometer Interferometer

2011-01-18

2011-01-18

Connolly, Patrick J (Department: 2877)

Optics: measuring and testing

By light interference

Reexamination Certificate

active

07872755

ABSTRACT:
A double-biprism electron interferometer is an optical system which dramatically increases the degree of freedom of a conventional one-stage electron interferometer. The double biprism interferometer, however, is the same as the optical system of the single electron biprism in terms of the one-dimensional shape of an electron hologram formed by filament electrodes, the direction of an interference area, and the azimuth of the interference fringes. In other words, the longitudinal direction of the interference area is determined corresponding to the direction of the filament electrodes, and the azimuth of the interference fringes only coincides with and is in parallel with the longitudinal direction of the interference area. An interferometer according to the present invention has upper-stage and lower-stage electron biprisms, and operates with an azimuth angle Φ between filament electrodes of the upper-stage and lower-stage electron biprisms to arbitrarily control an interference area and an azimuth θ of the interference fringes formed therein.

REFERENCES:
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Harada et al. “Double-biprism electron interferometry”, Applied Physics Letters, vol. 84, No. 17, pp. 3229-3231.
International Search Report for PCT/JP2006/301330 mailed May 16, 2006.
Harada et al., “High-Resolution observation by double-biprism electron holography”, Journal of Applied Physics, vol. 96, No. 11, pp. 6097-6102 (2004).
Harada et al., “Double-biprism electron interferometry”, Applied Physics Letters, vol. 84, No. 17, pp. 3229-3231 (2004).

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