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:
Sep. 25, 1979
Filed:
Jan. 04, 1978
Harold H Hopkins, Reading, GB;
Abstract
An optical system for conveying an optical image having two first biconvex od lenses arranged end to end on a common optical axis in spaced relationship, and between said first rod lenses but not in contact with them a pair of second rod lenses also arranged end to end on the same axis, the adjacent ends of the second rod lenses being concave and defining a biconvex cavity which can contain a fluid whereby a fluid lens is formed, the system being substantially symmetrical about a median plane through the biconvex cavity and the modulus of the reciprocal of the radius of curvature of the fluid lens being less than or equal to the modulus of the difference between the reciprocal of the radius of curvature of the convex surfaces of the first rod lenses adjacent to the second rod lenses and the reciprocal of the radius of curvature of the convex surfaces of the second rod lenses adjacent to the first rod lenses.