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:
Feb. 21, 1984
Filed:
Feb. 18, 1982
Giuseppe Tarsia, Valley Stream, NY (US);
Berkey Photo, Inc., White Plains, NY (US);
Abstract
In a photographic enlarger apparatus having a diffusion light head and utilizing interchangeable and differently sized light mixing chambers for transmission of light through negatives of various sizes, a light source positioning means is provided. The positioning means moves the light source so that it cooperates with a plurality of mixing chambers, each having a light exit sized to conform to a given transparency size, in order to minimize the length of the optical path. The positioning means also maintains the light beam in optical alignment with the light inlet of a selected light mixing chamber. Utilizing the present invention, a common optical axis may be maintained through all negatives and improved light image characteristics are obtained by reduction of the length of the optical path from the light source to the transparency.