Abstract

Angular measurements having a resolution of a few tenths of a microradian were made by using a system based on an acousto-optic beam deflector. The overall dynamic range of this system was approximately 1.8 mrad. The linearity of the relationship between the angle of deflection and changes in the rf driving signal was examined by an interferometric arrangement, and various possible limitations to accuracy were investigated. Applications for the technique are envisaged in long-path intersatellite communication systems, experiments involving small mechanical deflections such as metrological mass measurements, and tunable dye-laser scan calibrations in high-resolution spectroscopy.

© 1988 Optical Society of America

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References

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  1. M. J. Downs, K. W. Raine, “An unmodulated bi-directional fringe counting interferometer system for measuring displacement,” Precision Eng. 1, P85 (1979).
    [CrossRef]
  2. W. T. Welford, Aberrations of Optical Systems (Hilger, Bristol, UK, 1986).
  3. J. Sapriel, Acousto-Optics (Wiley, London, 1979).
  4. M. J. Coulombe, A. S. Pine, “Linear scan control of tunable lasers using a scanning Fabry–Perot,” Appl. Opt. 18, 1505–1512 (1979).
    [CrossRef] [PubMed]

1979 (2)

M. J. Downs, K. W. Raine, “An unmodulated bi-directional fringe counting interferometer system for measuring displacement,” Precision Eng. 1, P85 (1979).
[CrossRef]

M. J. Coulombe, A. S. Pine, “Linear scan control of tunable lasers using a scanning Fabry–Perot,” Appl. Opt. 18, 1505–1512 (1979).
[CrossRef] [PubMed]

Coulombe, M. J.

Downs, M. J.

M. J. Downs, K. W. Raine, “An unmodulated bi-directional fringe counting interferometer system for measuring displacement,” Precision Eng. 1, P85 (1979).
[CrossRef]

Pine, A. S.

Raine, K. W.

M. J. Downs, K. W. Raine, “An unmodulated bi-directional fringe counting interferometer system for measuring displacement,” Precision Eng. 1, P85 (1979).
[CrossRef]

Sapriel, J.

J. Sapriel, Acousto-Optics (Wiley, London, 1979).

Welford, W. T.

W. T. Welford, Aberrations of Optical Systems (Hilger, Bristol, UK, 1986).

Appl. Opt. (1)

Precision Eng. (1)

M. J. Downs, K. W. Raine, “An unmodulated bi-directional fringe counting interferometer system for measuring displacement,” Precision Eng. 1, P85 (1979).
[CrossRef]

Other (2)

W. T. Welford, Aberrations of Optical Systems (Hilger, Bristol, UK, 1986).

J. Sapriel, Acousto-Optics (Wiley, London, 1979).

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Figures (3)

Fig. 1
Fig. 1

Experimental arrangement. The interferometer is of a polarizing type. WP1 and WP2 are λ/4 and 5λ/8 wave plates; BS1 is a 50% beam splitter; BS2 is a polarizing beam splitter; PL1 and PL2 are polaroids; P1, P2, and P3 are photodiodes; M1, M2, and M3 are mirrors. The mirror M4 and the cube-corner reflectors C1 and C2 are attached to the rotating beam. L1 and L2 are lenses, and SP is a split photodiode. The functions of the beam deflector components are explained in the text.

Fig. 2
Fig. 2

Plot of the rf signal driving the acousto-optic cell versus the interferometer fringe count.

Fig. 3
Fig. 3

Plots of the residuals of (a) data set A and (b) data set B after removal of a fitted straight line. The standard deviation of data set A is 10 kHz, and that of set B is 9 kHz.

Tables (1)

Tables Icon

Table 1 Data Sets A and B

Metrics