Abstract: The traditional ptychographic imaging engine effectively improves the imaging quality and anti-noise ability of the system when the number of wavelengths involved in imaging increases, and it has been widely used in the fields of imaging and measurement. However, the complicated mechanical moving exposure method leads to jittering of the system, data acquisition inefficiency, and poor accuracy, and increase in the number of imaging wavelengths even more seriously affects the system imaging and measurement performance. In this work, the pinhole-array dual-wavelength single-shot ptychographic imaging is used. Actual optical experiments and numerical simulation demonstrate that the experimental data can be collected efficiently with double wavelength and high precision, and the drawbacks of traditional multiwavelength stack imaging are avoided. We also point out and demonstrat that, in choosing the laser wavelength involved in imaging, it is necessary to consider two important wavelength parameters, center wavelength and wavelength interval, which provides effective guidance for multiwavelength multilayer imaging technology. The pinhole-array-based single-shot ptychographic imaging with dual-wavelength has higher efficiency and a wider range of applications, compared with the traditional dual wavelength and multiwavelength ptychographic imaging engines.

Key words: pinhole-array, single-shot, ptychographic imaging engine, wavelength parameters