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:
Dec. 21, 1999
Filed:
Oct. 28, 1997
Nobuo Mushiake, Osaka, JP;
Yasumasa Sawai, Sakai, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
A projector is provided with a first lens array, a polarized beam splitter for splitting a beam of light into beams of linearly polarized light components whose polarization axes are normal to each other, a second lens array in vicinity of a position where the beams of linearly polarized light components converge, and a converter for converting one of the linearly polarized light components so as to have the same axes of polarization as the other linearly polarized light components. The polarized beam splitter includes a prism having the following relationship: ##EQU1## wherein .psi. denotes an angle of incidence with respect to the parallel plate, W denotes a width of the first lens, H denotes a height of the first lens, F denotes a focal length of the first lens, and N denotes a refractive index of the prism.