An adaptive optics microscopy system based on a DMD-assisted lateral shearing interferometer
Part Of
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
13435
Start Page
134350J
ISSN
0277786X
ISBN (of the container)
9781510686564
Date Issued
2025
Author(s)
Chiang, Yuan-Ming
Liu, Hong-Je
Lin, Sin-Ruei
Huang, Jiun-Woei
Lee, Shu-Sheng
Abstract
Adaptive optics technology was originally developed for astronomical observations to correct atmospheric disturbances and improve imaging quality. Recently, it has been widely adopted in fields such as optical communications and microscopy. Our research group has developed a DMD-assisted lateral shearing interferometer for wavefront sensing and correction. This system combined a digital micromirror device (DMD) and a lateral shearing interferometer operated by a shear plate and using a five-step phase-shifting method. In this study, we used a DMD with high resolution imaging (1080×1920) and a high refresh rate, to make the phase-shifting and the optical aberration correction more efficient. In addition, we integrated a designed K-mirror into the part of the wavefront sensing to utilize its ability to rotate images to simplify the optical path of the interferometer. This approach enhanced the stability of the system, and enabled wavefront gradient measurements in two orthogonal directions. Hence, a 2-D wavefront was accurately reconstructed and measured. The wavefront compensation was achieved by using computer generated holography (CGH), which allowed independent control of wavefront amplitude, phase and spatial frequency of the hologram. In the optical microscopy field, this system can compensate for the aberrations encountered during light propagation through inhomogeneity of material, which can lead to optical distortions, and enhance image quality.
Event(s)
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2025, 17 March 2025 - 20 March 2025, Vancouver
Subjects
adaptive optics (AO)
AO-microscopy
digital micromirror device (DMD)
Fourier optics
holography
Lee hologram method
microscopy
phase-shifting method
spatial light modulator (SLM)
two-axis shearing interferometer
wavefront aberrations
wavefront correction
wavefront sensing
Publisher
SPIE
Type
conference paper