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:
Nov. 14, 2023
Filed:
Jul. 27, 2020
Applicant:
Asml Netherlands B.v., Veldhoven, NL;
Inventors:
Arie Jeffrey Den Boef, Waalre, NL;
Simon Reinald Huisman, Eindhoven, NL;
Assignee:
ASML Netherlands B.V., Veldhoven, NL;
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/06 (2006.01); G02F 1/11 (2006.01); G03F 9/00 (2006.01);
U.S. Cl.
CPC ...
G02B 26/06 (2013.01); G02F 1/113 (2013.01); G03F 9/7088 (2013.01);
Abstract
Disclosed is a phase modulator apparatus comprises at least a first phase modulator for modulating input radiation, and a metrology device comprising such a phase modulator apparatus. The first phase modulator comprises a first moving grating in at least an operational state for diffracting the input radiation and Doppler shifting the frequency of the diffracted radiation; and a first compensatory grating element comprising a pitch configured to compensate for wavelength dependent dispersion of at least one diffraction order of said diffracted radiation.