Multi-zonal computer-generated holograms for high-precision optical adjustment purposes: part I: sensitivity and...

Area of Science:

• Optical engineering
• Metrology
• Holography

Background:

• High-accuracy optical alignment is critical in advanced scientific instruments.
• Traditional alignment methods can be limited in precision for demanding applications.
• Computer-generated holograms offer potential for enhanced optical metrology.

Purpose of the Study:

• To analyze the sensitivity of Multi-Zonal computer-generated holograms (MZ-CGHs) for optical alignment.
• To derive the relationship between interferometric measurements and lens placement errors.
• To assess the practical accuracy of large MZ-CGHs in optical adjustment tools.

Main Methods:

• Review of the fundamental principles of MZ-CGH-based alignment.
• Derivation of analytical relationships between tilt/power values and lens errors.
• Experimental testing of large 6″ MZ-CGHs with various optical measurements.

Main Results:

• Established analytical relations quantifying alignment accuracy based on interferometric data.
• Identified key parameters influencing the sensitivity of the MZ-CGH alignment method.
• Demonstrated the technical feasibility and achievable accuracy of large MZ-CGHs in practical optical setups.

Conclusions:

• MZ-CGHs combined with interferometric measurements are effective optical adjustment tools for high-accuracy requirements.
• The derived analytical framework provides a basis for understanding and optimizing MZ-CGH alignment sensitivity.
• The study confirms the practical applicability of large MZ-CGHs for precision optical alignment, paving the way for their use in complex systems like the Euclid space telescope.