Abstract

We describe an interferometer that makes use of an optical pickup. This widespread consumer electronics component has a high degree of technological content. A typical head contains a remarkable, highly integrated sample of optoelectronic laboratory equipment. The application that we report is a significant and novel example of the potential exploitation of the unique features of such a device for scientific aims. Many interferometric configurations can be envisaged, depending on the specific pickup design. We present a Fizeau multiphase homodyne interferometer that makes use of an astigmatic-focus-detection pickup. Its quadrant detector provides four photocurrent signals whose phase delays can be easily controlled. This allows us to apply phase-shifting interferometry algorithms for data reduction.

© 1999 Optical Society of America

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References

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  1. J. Benschop and G. van Rosmalen, Appl. Opt. 30, 1179 (1991).
    [CrossRef] [PubMed]
  2. C. During, S. Andersson, and J. Wilkander, Sens. Actuators A 32, 575 (1992).
    [CrossRef]
  3. T. R. Armstrong and M. P. Fitzgerald, Meas. Sci. Technol. 3, 1072 (1992).
    [CrossRef]
  4. F. Quercioli, A. Mannoni, and B. Tiribilli, Appl. Opt. 36, 6372 (1997).
    [CrossRef]
  5. F. Quercioli, A. Mannoni, and B. Tiribilli, Appl. Opt. 37, 5932 (1998).
    [CrossRef]
  6. See, for example, A. Bearden, M. P. O’Neill, L. C. Osborne, and T. L. Wong, Opt. Lett. 18, 238 (1993).
    [CrossRef]
  7. See, for example, K. Creath, in Progress in Optics XXVI, E. Wolf, ed. (North-Holland, Amsterdam, 1988), Chap. V.
  8. M. Hercher, Opt. Photon. News 2(11), 24 (1991).
    [CrossRef]
  9. L. Merz, Appl. Opt. 28, 1011 (1989).
    [CrossRef]

1998 (1)

1997 (1)

1993 (1)

1992 (2)

C. During, S. Andersson, and J. Wilkander, Sens. Actuators A 32, 575 (1992).
[CrossRef]

T. R. Armstrong and M. P. Fitzgerald, Meas. Sci. Technol. 3, 1072 (1992).
[CrossRef]

1991 (2)

1989 (1)

Andersson, S.

C. During, S. Andersson, and J. Wilkander, Sens. Actuators A 32, 575 (1992).
[CrossRef]

Armstrong, T. R.

T. R. Armstrong and M. P. Fitzgerald, Meas. Sci. Technol. 3, 1072 (1992).
[CrossRef]

Bearden, A.

Benschop, J.

Creath, K.

See, for example, K. Creath, in Progress in Optics XXVI, E. Wolf, ed. (North-Holland, Amsterdam, 1988), Chap. V.

During, C.

C. During, S. Andersson, and J. Wilkander, Sens. Actuators A 32, 575 (1992).
[CrossRef]

Fitzgerald, M. P.

T. R. Armstrong and M. P. Fitzgerald, Meas. Sci. Technol. 3, 1072 (1992).
[CrossRef]

Hercher, M.

M. Hercher, Opt. Photon. News 2(11), 24 (1991).
[CrossRef]

Mannoni, A.

Merz, L.

O’Neill, M. P.

Osborne, L. C.

Quercioli, F.

Tiribilli, B.

van Rosmalen, G.

Wilkander, J.

C. During, S. Andersson, and J. Wilkander, Sens. Actuators A 32, 575 (1992).
[CrossRef]

Wong, T. L.

Appl. Opt. (4)

Meas. Sci. Technol. (1)

T. R. Armstrong and M. P. Fitzgerald, Meas. Sci. Technol. 3, 1072 (1992).
[CrossRef]

Opt. Lett. (1)

Opt. Photon. News (1)

M. Hercher, Opt. Photon. News 2(11), 24 (1991).
[CrossRef]

Sens. Actuators A (1)

C. During, S. Andersson, and J. Wilkander, Sens. Actuators A 32, 575 (1992).
[CrossRef]

Other (1)

See, for example, K. Creath, in Progress in Optics XXVI, E. Wolf, ed. (North-Holland, Amsterdam, 1988), Chap. V.

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Figures (4)

Fig. 1
Fig. 1

Typical layout of an optical pickup. The type used in the present work is a three-beam astigmatic-focus-sensor device, and its detector-element arrangement is shown at the upper left-hand side of the figure. For the present interferometric application a reference flat is introduced, and the objective is removed.

Fig. 2
Fig. 2

Photocurrent signals versus time when the test surface is moved axially with a triangular voltage-driven piezoelectric transducer. The asymmetry between the left-hand (incoming) and the right-hand (outgoing) parts of the figure is due to piezo hysteresis. An equal phase-step size of π/2 between detectors is chosen.

Fig. 3
Fig. 3

Measured displacement of a piezo driven by a triangular voltage waveform of progressively diminishing amplitude. Three cycles are shown.

Fig. 4
Fig. 4

Longitudinal coherence module for two values of the pump current. The top and bottom curves are obtained at current values of 48.3 and 42.8  mA, respectively.

Equations (3)

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Ix,y;P=IP+IPcos2πfxx+fyy+ψP,
IdP=IPr2+IPr2sinπrfxπrfxsinπrfyπrfy×cosπr±fx±fy+ψP,
ψP=4πλzP= tan-1ICP-IDPIAP-IBP.

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