The Zernike polynomials are a complete set of continuous functions orthogonal over a unit
circle. Since first developed by Zernike in 1934, they have been in widespread use in many …

Thanks to the recent development in diffractive optical element (DOE) fabrication technique,
large aperture diffractive telescope systems have been tremendously studied to achieve …

In this report, a method is proposed to demodulate a single-shot interferogram based on
deep learning using a convolutional neural network (CNN). The time required to demodulate …

To accurately obtain the phase distribution of an optical surface under test, the accurate
phase extraction algorithm is essential. To overcome the phase shift error, a random two …

Two steps phase shifting interferometry has been a hot topic in the recent years. We present
a comparison study of 12 representative self–tunning algorithms based on two-steps phase …

To balance the accuracy and speed of phase reconstruction, two-step phase-shifting
algorithms (TS-PSAs) have been developed. TS-PSAs can be divided into two types, one is …

This paper proposes a high-precision phase retrieval method based on deep learning to
extract the Zernike coefficients from a single-frame interferogram with an irregular-shaped …

Gram-Schmidt (GS) orthogonal normalization is a fast and efficient two-frame fringe phase
demodulation method. However, the precision of the GS method is limited due to the …

The use of phase-shifting interferometry (PSI) in the ultra-low-light region would open the
way for important applications, such as imaging of phototoxic substances and sensing of …

Fringe analysis in two-shot phase-shifting interferometry is important but meets challenges
due to a limited number of images, corrupting noise, and background modulation. Here we …