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:
Jun. 23, 1992
Filed:
Dec. 27, 1989
Applicant:
Inventors:
James R Leger, Groton, MA (US);
Gary J Swanson, Lexington, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359565 ; 359569 ; 359619 ;
Abstract
An optical element for converting a uniform beam of light of wavelength .lambda. into an array of illuminated spots, the optical element including a phase plate made of an array of constant phase zones; and an image plane disposed parallel to and at a preselected distance from the phase plate, the preselected distance being selected so that illuminating the phase plate with uniform coherent illumination of wavelength .lambda. produces the array of illuminated spots on the image plane, the spot array having a fill factor in at least one dimension that is less than 1/2.