Retardation Mapping System for Astronomical Mirrors

NASA’s next-generation space telescopes, including the Habitable Worlds Observatory (HWO), require ultra-low polarization aberrations, but existing metrology tools cannot fully characterize polarization effects on large, curved astronomical mirrors over a broad spectral range. This project will advance Axometrics’ AxoScan Mueller matrix spectropolarimeter (MMSP-UW) into a fully commercialized system, enabling full Mueller matrix mapping from 250–2100 nm. Phase II funding will support the development of an integrated measurement system for 1-meter-class mirror segments, incorporating key advancements from Phase I, including a dual-detector architecture and hyper-achromatic retarder for extended spectral coverage and improved accuracy. The system will be delivered to NASA within a VVRM-1000D industrial ellipsometer platform for direct use in mirror validation and polarization control, supporting HWO and future space observatories. Beyond NASA, this technology has strong commercial applications in aerospace, semiconductor manufacturing, and precision optics, where high-accuracy polarization metrology is essential.

The enhanced AxoScan Mueller matrix spectropolarimeter (MMSP-UW) will support NASA’s mission directives by enabling high-precision polarization characterization of large astronomical mirrors, a critical need for next-generation space telescopes such as the Habitable Worlds Observatory (HWO). This technology provides full Mueller matrix mapping from 250–2100 nm, ensuring accurate assessment of birefringence and polarization aberrations that impact exoplanet imaging and astrophysical observations. The system will be delivered in a VVRM-1000D platform for testing 1-meter-class mirror segments, but its modular design allows for scalability to extremely large mirrors, making it suitable for ground-based telescope mirrors as well. This capability supports NASA’s involvement in large-aperture observatories and future space-based interferometry missions requiring ultra-low polarization distortion. Beyond mirror testing, this system can characterize polarization-critical optics used in NASA telescopes, including beamsplitters, lenses, filters, and other optical components where polarization effects must be controlled. It can be integrated into NASA’s metrology facilities at GSFC, JPL, and other centers, providing a standardized tool for optical component testing in future observatories and Earth observation satellites. The enhanced AxoScan Mueller matrix spectropolarimeter (MMSP-UW) has strong commercialization potential in industries requiring precise polarization metrology. By expanding the measurable spectral range from 250–2100 nm and enabling full Mueller matrix characterization, this system addresses key challenges in aerospace, semiconductor manufacturing, and precision optics. In aerospace and defense, polarization control is essential for imaging systems, optical coatings, and remote sensing. The MMSP-UW can support manufacturers in testing satellite optics, laser systems, and high-performance sensors to minimize polarization distortion. In semiconductor manufacturing, birefringence control is crucial for photolithography and wafer inspection. The system’s broad spectral range enables precise characterization of lithography optics, photomasks, and polarization-sensitive coatings, improving yield and device performance. For precision optics, the MMSP-UW provides a comprehensive tool for characterizing birefringence in lenses, beamsplitters, and coatings. It is ideal for AR/VR optics, high-end cameras, and scientific instruments, ensuring polarization consistency in advanced optical systems. The system’s scalability to extremely large optics opens new opportunities in ground-based telescope development, enabling better polarization control in astronomical instruments and adaptive optics. Axometrics plans to commercialize this system through direct sales, industry partnerships, and integration into existing metrology workflows, establishing it as a leading solution for high-accuracy polarization measurement.

This is a mature technology (TRL 7+) — the realistic path in is usually NASA's Technology Transfer Program: licensing an existing NASA patent, or a Space Act Agreement to use NASA facilities/expertise directly. NASA also runs a startup licensing program with no upfront fee for companies formed to commercialize a specific NASA technology.

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