Effects on the OTF of MSF structures with random variations
Optics Express
|December 28, 2019
Summary
Mid-spatial frequency (MSF) structures from diamond machining impact optical performance. This study analyzes MSF effects and provides analytic estimates for optical transfer function, aiding in MSF tolerancing for better optical system design.
Area of Science:
- Optical Engineering
- Metrology
- Surface Science
Background:
- Diamond machining is crucial for creating high-precision optical surfaces.
- Mid-spatial frequency (MSF) structures arise from tool-tip artifacts during manufacturing.
- Random variations in MSF structures can degrade optical system performance.
Purpose of the Study:
- To analyze the impact of MSF structures on optical performance.
- To derive analytic estimates for the optical transfer function (OTF) related to MSF parameters.
- To provide tools for MSF tolerancing in optical design.
Main Methods:
- Analysis of MSF structure formation in diamond-machined freeform optics.
- Derivation of analytical models for optical transfer function (OTF).
- Correlation of MSF parameters with optical performance degradation.
Main Results:
- Quantified the relationship between MSF structure parameters and optical performance.
- Developed simple analytic expressions for OTF degradation due to MSF.
- Demonstrated the influence of random MSF variations on system aberrations.
Conclusions:
- MSF structures significantly affect optical performance, necessitating careful control.
- The derived analytic estimates facilitate MSF tolerancing and system design.
- Understanding MSF effects is critical for achieving desired optical quality in freeform optics.
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