DEVICE FOR MEASURING THE MODULATION TRANSFER FUNCTION IN LARGE SIZE OPTICAL INSTRUMENTS

摘要

The invention pertains generally to the field of optical control benches for large-size optical instruments (3). The control bench of the invention includes a collimator (4) having a pupil with a diameter lower than that of the instrument. The cost and the complexity of the control bench can thus be reduced. The collimator is mounted on a movement in translation means (44). For each position of the collimator, the method comprises measuring the wave surface WFEk of the sub-pupil SPk of the corresponding instrument at said position. Based on the different measures obtained, the method comprises deriving the global wave area of the instrument. The different measures and analysis are substantially based on phase-restitution and local wave-surface resetting algorithms.