SINGLE-SHOT MULTISPECTRAL WAVEFRONT SENSOR FOR LASER BEAM CHARACTERIZATION AND QUANTITATIVE PHASE BIO-IMAGING

All existing Wavefront sensors (WFS) can only measure several wavefronts by sequential image acquisition. Sequential multi-spectral WFS has several drawbacks: it is difficult to implement, expensive, and incompatible with single-pulse laser characterization. This innovative system now allows simultaneous wavefront shapes measurement at different wavelengths using the multi-spectral (broadband or multi-line) light beam. It relies on the recent development of a wavefront analyzer (DiPSI) based on the use of a simple diffuser that obviates all these drawbacks by performing spectral measurements simultaneously. This aspect is advantageous for a variety of applications such as optical metrology, laser metrology, quantitative phase imaging and ophthalmology.

Applications:

• Spatio-temporal characterization of ultra-short pulse laser
• Single-shot 3D tomographic imaging for flow cytometry
• Optical metrology, freeform optic, metasurfaces
• Optical aberration measurements
• Ophtalmology
• Nanoparticle characterization

Competitive advantages:

• Based on DiPSI solution (Diffuser Phase Sensing and Imaging): simple, modular, broadband, high-sensitivity and high spatial resolution WFS
• Easy to implement, modular and low cost by avoiding the use of many filters
• Performs spatial and/or spectral measurements simultaneously, which facilitate its application to quickly evolving systems

Keywords: Multi-spectral wavefront analyzer, Wavefront sensor (WFS), Spatio-temporal wavefront analyzer, DiPSI, Quantitative Phase Imaging (QPI), Ultra-short pulse laser