Investigation into the Co-Phase Detection Methodology for Segmented Plane Mirrors Utilizing Grazing Incidence...

Area of Science:

• Optical Engineering
• Interferometry
• Space Optics

Background:

• Segmented plane mirrors are vital for large-aperture space optical imaging systems.
• Surface errors in these mirrors, particularly piston errors, challenge precise alignment.
• Existing tilt error detection methods are insufficient for piston errors.

Purpose of the Study:

• To introduce a novel method for long-range, high-precision, and efficient co-phase detection of segmented plane mirrors.
• To address the challenges associated with detecting and adjusting piston errors.

Main Methods:

• A segmented plane mirror shape detection method based on grazing incidence interferometry is proposed.
• The incident angle of the interferometer is manipulated for adjustments.

Main Results:

• The method broadens the detection range for piston errors.
• It mitigates the 2π ambiguity issue common in co-phase detection.
• Detection capabilities of interferometers are extended.

Conclusions:

• Grazing incidence interferometry offers an effective solution for piston error detection in segmented mirrors.
• This approach enables both rough and precise adjustments, improving alignment accuracy.
• The method is crucial for advancing large-aperture space optical imaging systems.