The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2021
Filed:
Feb. 18, 2019
Ii-vi Delaware, Inc., Wilmington, DE (US);
Kun Gao, San Jose, CA (US);
Jack R. Kelly, Lake Mary, FL (US);
Helen Chen, Cupertino, CA (US);
Guomin Jiang, Fremont, CA (US);
Xinran Wang, Mountain View, CA (US);
Lixin (Lawrence) Wang, Fremont, CA (US);
Qingyu (Tom) Li, Cupertino, CA (US);
Haiji J. Yuan, Cupertino, CA (US);
II-VI Delaware, Inc., Wilmington, DE (US);
Abstract
A two-step optimization process is utilized to define an optimal phase profile for a LCoS spatial light modulator. The two-step optimization process first utilizes a nonlinear constrained optimization (NCO) program to determine the specific parameters required to obtain an optimal phase profile (hologram), where the 'optimal phase profile' is typically defined as that profile which achieves maximum diffraction efficiency for optical switching. Following this first step, phase scaling (and perhaps an adjustment in the number of pixels per period) is employed to slightly modify the values of the optimal phase profile to effectively suppress crosstalk peaks. If any orders still exhibit an unacceptable level of crosstalk, these orders are then subtracted from the phase profile to create the final design.