Constraint-driven DMD-integrated off-axis freeform four-mirror relay imaging for active suppression of laser and intense-light interference.

Authors

Xinyi Wang, Weining Chen, Hongtao Yang

Published in

Applied optics. Volume 65. Issue 28. Pages 9917-9927. Oct 01, 2026.

Abstract

Imaging detectors under intense light suffer from local saturation and reduced visibility. We propose a co-design methodology for active front-end interference suppression. This framework formulates the coupled physical constraints of beam separation, conjugate transfer, and non-rotationally symmetric aberration correction inherent to tilted modulation planes. By integrating digital micromirror device (DMD) spatial modulation with a two-stage off-axis freeform four-mirror architecture, we reveal the joint governing mechanisms of local masking, plane orientation, and aberration correction. Simulations over 0.35-1.0 µm yield a full-field MTF above 0.725 at 50 lp/mm and a maximum distortion of 2.29%. Independent validation of the second-order DMD-to-detector mapping yields residuals of 0.407 µm RMS and 0.763 µm maximum. An ideal 20×20µm OFF-state mask rejects 89.07% of selected interference energy, corresponding to 9.61 dB suppression and demonstrating system-level feasibility.

PMID:
42837574
Bibliographic data and abstract were imported from PubMed on 07 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.