Gallery
Interferometric test setup for lens alignment
Fig. 8. Interferometric test setup for lens alignment (sketch and pictures)
For various measurement and adjustment tasks, computer-generated holograms (CGHs) with several zones (MZ-CGHs) are used. These are diffractive optical elements with the ability to form almost arbitrarily shaped wave fronts. The figure shows a setup for a measurement systems analysis of the applied CGHs. For example, the straightness of the axis, defined by the series of spots, is verified with an accuracy in the sub-micron region, which is essential for the lens adjustment.
Fig. 9. Alignment of the scaled lens L2