Two-Shot Calibration Method for Phase-Only Spatial Light Modulators with Generalized Spatial Differentiator
| Autor: | Zhichao Ruan, Tengfeng Zhu, Junyi Huang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Wavefront
Physics business.industry Astrophysics::Instrumentation and Methods for Astrophysics Phase (waves) General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Stability (probability) Differentiator Interferometry Planar Optics 0103 physical sciences Calibration 010306 general physics 0210 nano-technology business Group delay and phase delay |
| Zdroj: | Physical Review Applied. 14 |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.14.054040 |
| Popis: | For phase-only spatial light modulators (SLMs), it is necessary to calibrate phase-response curves in various applications with light wavefront shaping. Here we develop a method to calibrate the global phase-response curve, based on the generalized optical spatial differentiation. We show that by only setting two specific profiles in SLM and analyzing the light reflected by a planar interface under cross-polarization conditions, the phase delay can be evaluated from two shots of intensity images. In comparison with conventional interferometric or diffractive approaches, we experimentally demonstrate that the present method enables in situ calibration and takes advantages of simple process and high stability. Besides, the method can also be used to calibrate the phase-response curve of each single pixel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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