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:
Nov. 26, 1985
Filed:
Jan. 11, 1983
William D Bridson, Ontario, NY (US);
Edward N Esmay, Webster, NY (US);
Bausch & Lomb Incorporated, Rochester, NY (US);
Abstract
A multi-objective optical instrument, such as a microscope, has a photocell disposed in the optical path so as to effectively detect the intensity of light being transmitted by an illuminator to a receptor plane, such as defined by an operator's eyes. The light detected by the photocell is compared against a preset level of light. The intensity of the illumination would be adjusted automatically to a minimum level when the carrier is rotated and to a preselected level when an objective is in place for viewing. An electrical switch is cooperatively mounted to the rotatable objective carrier and detects rotation of the carrier to control the flow of current to the illuminator.