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. 21, 2024
Filed:
Sep. 10, 2020
The Regents of the University of California, Oakland, CA (US);
Jeremy J. Axelrod, Berkeley, CA (US);
Carter Turnbaugh, Berkeley, CA (US);
Sara Campbell, El Cerrito, CA (US);
Osip Schwartz, Albany, CA (US);
Robert M. Glaeser, Berkeley, CA (US);
Holger Mueller, Orinda, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A ponderomotive phase plate, also called a laser phase plate or standing wave optical phase plate, has a first minor and a second minor that define an optical cavity. An electron beam passes through a focal spot of the optical cavity. A laser with variable polarization angle of laser light is coupled to the optical cavity. A standing wave of polarized laser light, with an anti-node at the focal spot of the optical cavity, causes variable modulation of the electron beam. The variable modulation of the electron beam is controllable by the variable polarization angle of the laser light. In a transmission electron microscope, an image plane receives the electron beam modulated by the standing wave optical phase plate. An image formed at the image plane is based on the variable polarization angle of the polarized laser light.