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. 04, 1983
Filed:
Aug. 11, 1980
Barry Broome, Glendora, CA (US);
Sport-O-Scope, Inc., Bethlehem, PA (US);
Abstract
A terrestrial (erecting) telescope that may be inexpensively manufactured with plastic lenses but which telescope will provide a high quality image. The telescope comprises an objective lens, usually a single plano-convex lens, mounted in an outer tube. The telescope further comprises an inner tube in which are fixed an erecting lens system and an eye piece lens system. The erecting lens system comprises two identical plastic lens elements with opposite spherical and aspherical surfaces. The spherical surfaces of the erector lenses are facing. The eye piece lens system comprises a Ramsden eye piece having two plano-convex lenses with facing spherical surfaces. The aperture stop is positioned equidistance between the lenses of the erector lens system.