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:
Jan. 16, 1996
Filed:
Dec. 08, 1994
Tomohide Inada, Tokyo, JP;
Nippon Avionics Co., Ltd., Tokyo, JP;
Abstract
A linear polarization/conversion apparatus includes a light source, a polarizing beam splitting means, first and second focusing lenses, and first to fourth total reflection mirrors. The light source includes a reflector having a paraboloid of revolution. The polarizing beam splitting means splits light from the light source into a linearly polarized transmission light component and a linearly polarized reflection light component. The first and second focusing lenses are respectively disposed to oppose exit surfaces, of the polarizing beam splitting means, from which the linearly polarized transmission and reflection light components emerge. The first and second total reflection mirrors are inclined at 45.degree. with respect to the exit surfaces, respectively, so as to totally reflect the linearly polarized transmission and reflection light components from the first and second focusing lenses. The third and fourth total reflection mirrors are respectively inclined at 45.degree. with respect to the reflection optical axes of the first and second total reflection mirrors to totally reflect the light, reflected by the first and second total reflection mirrors, in the same direction.