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    Spatial frequency modulated imaging (SPIFI) now uses a spatial light modulator (SLM) for versatile, random access imaging. A new spectral phase and amplitude retrieval and compensation (SPARC) technique quantifies light exposure for optimized imaging.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Advanced Microscopy Techniques

    Background:

    • Spatial frequency modulated imaging (SPIFI) traditionally uses fixed excitation geometries.
    • Single-element detection is compatible with extended excitation sources in SPIFI.
    • Limitations exist in SPIFI's adaptability and precise control of illumination.

    Purpose of the Study:

    • To investigate the integration of spatial light modulators (SLMs) into SPIFI for enhanced imaging versatility.
    • To introduce a novel method for quantitative pulse compensation and measurement in SPIFI systems.
    • To enable random access imaging capabilities with SPIFI.

    Main Methods:

    • Implementation of a spatial light modulator (SLM) to dynamically program the excitation source geometry.
    • Development and application of spectral phase and amplitude retrieval and compensation (SPARC) for in-line quantitative measurements.
    • Characterization of light exposure conditions at the focal plane of the developed random access imaging system.

    Main Results:

    • Demonstration of SPIFI with a programmable, spatially modulated excitation source.
    • Successful implementation of SPARC for precise measurement and compensation of optical pulses.
    • Establishment of a versatile, random access imaging environment with SPIFI.

    Conclusions:

    • Programmable excitation sources significantly enhance SPIFI's versatility and enable random access imaging.
    • SPARC provides crucial quantitative data for optimizing and reporting imaging conditions.
    • This advancement paves the way for more controlled and adaptable advanced imaging applications.