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:
Oct. 11, 1988
Filed:
Oct. 01, 1987
Charles S Ih, Newark, DE (US);
Camber Corporation, Woburn, MA (US);
Abstract
A holographic head including a collimating element for receiving a coherent beam of radiation non-circular in cross section, an objective element for receiving a radiation beam and focusing it to a spot, and a holographic unit also disposed in the path of the beam. The holographic unit includes a first hologram element for passing the beam at a predetermined diffractive order and sign. The holographic unit further includes a second hologram element inclined at an angle to the first hologram element for providing a beam substantially circular in cross section and at the same diffractive order and opposite sign to compensate for dispersion. The first and second holograms may additionally compensate for collimating or objective element aberrations, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile