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    Misalignments in LiDAR emitter collimation lenses impact performance. Lens rotation is most critical, requiring a precise alignment procedure for improved reliability and reduced costs in micro-optical systems.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering
    • LiDAR Technology

    Background:

    • LiDAR systems require precise optical alignment for optimal performance.
    • Collimation lenses are critical components in LiDAR emitters, influencing beam quality and throughput.
    • Understanding misalignment effects is crucial for manufacturing and reliability.

    Purpose of the Study:

    • To investigate the impact of collimation lens misalignments on LiDAR emitter performance criteria.
    • To establish an alignment concept for the initial section of a LiDAR emitter.
    • To identify critical misalignment factors and propose a practical alignment solution.

    Main Methods:

    • Raytracing simulations were employed to model the optical system.
    • Performance criteria, including minimum throughput and maximum beam height, were defined and analyzed.
    • Defined misalignments were systematically introduced to study their effects.

    Main Results:

    • The study quantified the impact of various misalignments on LiDAR performance.
    • Rotation of the acylinder around the optical axis was identified as the most sensitive parameter.
    • The analysis determined whether passive or active alignment is necessary for each misalignment.

    Conclusions:

    • A practical alignment procedure was developed based on tolerancing analysis.
    • The findings provide insights into critical misalignment factors for micro-optical systems.
    • This work can lead to reduced manufacturing costs and enhanced reliability of LiDAR systems.