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    Area of Science:

    • Optical Engineering
    • Computational Optics
    • Radiometry

    Background:

    • Accurate irradiance evaluation is crucial for optical system analysis and design.
    • Existing methods like Monte Carlo raytracing can be computationally intensive and time-consuming.
    • Efficient and precise irradiance calculations are needed for optimizing optical performance.

    Purpose of the Study:

    • To introduce a novel quasi-analytic method for calculating irradiance distribution.
    • To compare the proposed method's efficiency and accuracy against Monte Carlo raytracing.
    • To demonstrate the method's utility in optical design for merit function evaluation.

    Main Methods:

    • Development of a quasi-analytic approach for irradiance calculation.
    • Single refractive surface and single Lambertian source modeling.
    • Comparison with Monte Carlo raytracing on a sample optical system.

    Main Results:

    • The quasi-analytic method achieved irradiance distribution accuracy comparable to Monte Carlo raytracing.
    • The new method significantly reduced computation time compared to raytracing.
    • The method provided noise-free evaluations suitable for optical design.

    Conclusions:

    • The quasi-analytic method offers a fast and accurate alternative for irradiance evaluation.
    • This technique is beneficial for accelerating optical analysis and design workflows.
    • The method enables efficient, derivative-aware merit function evaluation in optical design.