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Fig. 16.


Cavity variations due to the deformation of the optical surfaces during a scan. The maps have been obtained by subtracting M(x, y, 0) from M(x, y, n), after removal of the tilt. The small-scale fringes and straight patterns are due to residual interference between the optical surfaces, and from the CCD readout, respectively, and are not related to the shape of the cavity.

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