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. 04, 2018
Filed:
Dec. 28, 2017
Axis Ab, Lund, SE;
Stefan Lundberg, Lund, SE;
Jonas Hjelmström, Lund, SE;
Axis AB, Lund, SE;
Abstract
A method for sequential control of a diaphragm arrangement of a camera, the arrangement comprising a diaphragm, and an integrated IR cut filter always covering at least a portion of an aperture opening of the diaphragm, comprising: initiating closing or opening of the diaphragm; detecting an amount of incident radiation when the diaphragm has an initial aperture opening; shifting the aperture opening to an intermediate aperture opening to alter the ratio between visible light and infrared radiation passing the diaphragm; detecting an amount of incident radiation following the shift; calculating a composition of visual light and infrared radiation in the scene from the detected amounts of incident radiation and a calculated ratio between visible light and infrared radiation when having the initial aperture opening and the intermediate aperture opening, respectively; and shifting the aperture opening of the diaphragm to a new position.