Abstract

We present a new technique for fast form measurement based on imaging with partially coherent illumination. It consists of a $4f$-imaging system with a digital micro-mirror device (DMD) located in the Fourier plane of its two lenses. The setup benefits from spatially partially coherent illumination that allows for depth discrimination and a DMD that enables a fast depth scan. Evaluating the intensity contrast, the 3D form of an object is reconstructed. We show that the technique additionally offers extended depth of focus imaging in microscopy and short measurement times of less than a second.

© 2020 Optical Society of America

Fast 3D form measurement using a tunable lens profiler based on imaging with LED illumination

Mostafa Agour, Claas Fallorf, and Ralf. B. Bergmann
Opt. Express 29(1) 385-399 (2021)

Active illumination using a digital micromirror device for quantitative phase imaging

Seungwoo Shin, Kyoohyun Kim, Jonghee Yoon, and YongKeun Park
Opt. Lett. 40(22) 5407-5410 (2015)

Low-coherence digital holography with a multireflection reference mirror

Quang Duc Pham and Yoshio Hayasaki
Opt. Lett. 45(16) 4393-4396 (2020)

Wide-angle speckleless DMD holographic display using structured illumination with temporal multiplexing

Byounghyo Lee, Dongheon Yoo, Jinsoo Jeong, Seungjae Lee, Dukho Lee, and Byoungho Lee
Opt. Lett. 45(8) 2148-2151 (2020)

Fast volumetric imaging with patterned illumination via digital micro-mirror device-based temporal focusing multiphoton microscopy

Chia-Yuan Chang, Yvonne Yuling Hu, Chun-Yu Lin, Cheng-Han Lin, Hsin-Yu Chang, Sheng-Feng Tsai, Tzu-Wei Lin, and Shean-Jen Chen
Biomed. Opt. Express 7(5) 1727-1736 (2016)