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, 1976
Filed:
Mar. 26, 1975
Jon Hall, Santa Monica, CA (US);
Optivision Inc., Santa Monica, CA (US);
Abstract
The enlarging system includes a projection housing for receiving a negative film insert device supporting an anamorphic negative film image which is projected towards a working surface. Below the insert device is a projection lens, lens adapter, anamorphic lens secured in the adapter, and a dioptor lens. A light bellows connects between the projection lens and the negative film insert device. A first adjustment is used to vary the distance of the entire projection housing and lens system towards and away from the working surface. A second adjustment, in turn, varies the distance of the lens system from the negative film insert device. The dioptor in combination with the anamorphic lens permits a selected format size for the enlarged print to be chosen, the first adjustment matching perfectly the projected image with the selected format. The second adjustment brings the image into a fine focus.