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:
Aug. 11, 2026
Filed:
May. 23, 2023
National Central University, Taoyuan City, TW;
National Central University, Taoyuan City, TW;
Abstract
A diffractive optical assembly includes an input coupler, an output coupler, and an image source. The output coupler is next to the input coupler. One of the input coupler and the output coupler has a most critical holographic optical element (HOE), and another one has a diffractive optical element (DOE). Bragg condition of the most critical HOE is more sensitive than Bragg condition of the DOE. The image source is configured to generate image light that is incident to the input coupler then propagates to the output coupler. The image light has incident angles to the input coupler and wavelengths corresponding to the incident angles. The wavelengths of the image light on the image source have a two-dimensional spatial distribution, such that relationships between the incident angles and the wavelengths of the image light comply with Bragg selectivity of the most critical HOE.