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:
Sep. 20, 2011
Filed:
Sep. 04, 2008
Josef F. Bille, Heidelberg, DE;
Josef F. Bille, Heidelberg, DE;
Heidelberg Engineering GmbH, Heidelberg, DE;
Abstract
A custom phase plate for a light beam of wavelength 'λ' includes a sheet of plastic material having a base refractive index 'n'. Formed onto a surface of the sheet is a plurality of contiguous spots having different refractive indices. Together, the spots establish a diffraction pattern in a light beam that removes optical aberrations from the beam. Specifically, each spot has a selected Optical Path Difference (OPD) relative to the base index (n) that is equal to kλ/10 (for k=1 to 10). Further, the OPD for each spot in the pattern is individually established by heating the plastic material with a laser beam of ultra-short pulses.