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Mapping Distortion Correction in Freeform Mirror Testing Distortion could be introduced in the null testing with computer generated hologram (CGH) for freeform mirror A method is proposed to correct the distortion and improve the accuracy of the corrected mapping
Distortion compensation in interferometric testing of mirrors We present a method to compensate for the imaging distortion encountered in interferometric testing of mirrors, which is introduced by interferometer optics as well as from geometric projection errors
Interferometric testing for off-axis aspherical mirrors with computer . . . As a result, our CGH interferometer produces a good interferogram with high resolution of 2 8 mm for the off-axis aspherical mirror with a size of 1 2 m With improved usage of the CGH, we successfully demonstrated a high lateral resolution interferometer
Enhanced Shack–Hartmann wavefront sensor with propagation correction . . . The proposed method establishes a wavefront propagation-correction model (PC model) that combines wavefront backward tracing and phase-conjugate reflection wavefront mapping Both simulations and experiments confirm the enhanced accuracy and stability of the proposed approach