PreprintarXiv licencearXiv
Non-contact lens metrology from optical flow and differentiable ray tracing
Abstract
Accurate lens surface metrology is essential to determine the manufactured geometry of refractive optical elements and their deviation from the specified design. We demonstrate a transmission metrology method that reconstructs refractive lens surfaces from the displacement of a wavelet-noise-patterned mask. Lens-induced distortion is represented by a dense displacement field. A differentiable ray tracer fits the lens geometry using a calibrated near-telecentric camera model with an effective finite ray origin. We validate the method on commercial lenses. The recovered geometries agree with nominal specifications, and the plano-aspheric reconstruction is compared with chromatic confocal profilometry.
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BibTeX
@misc{jimenezromero2026noncontact,
title = {{Non-contact lens metrology from optical flow and differentiable ray tracing}},
author = {Hector A. Jimenez-Romero and Wolfgang Heidrich},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.17515},
eprint = {2610.17515},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.17515},
}
RIS
TY - UNPB
TI - Non-contact lens metrology from optical flow and differentiable ray tracing
AU - Hector A. Jimenez-Romero
AU - Wolfgang Heidrich
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2610.17515
UR - https://arxiv.org/abs/2610.17515
AB - Accurate lens surface metrology is essential to determine the manufactured geometry of refractive optical elements and their deviation from the specified design. We demonstrate a transmission metrology method that reconstructs refractive lens surfaces from the displacement of a wavelet-noise-patterned mask. Lens-induced distortion is represented by a dense displacement field. A differentiable ray tracer fits the lens geometry using a calibrated near-telecentric camera model with an effective finite ray origin. We validate the method on commercial lenses. The recovered geometries agree with nominal specifications, and the plano-aspheric reconstruction is compared with chromatic confocal profilometry.
ER -