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:
Jan. 27, 2015
Filed:
Feb. 23, 2011
Lars Christian Casper, Den Bosch, NL;
Christina Tanase, Eidhoven, NL;
Lars Christian Casper, Den Bosch, NL;
Christina Tanase, Eidhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
This invention relates to an optical device () for intercanopy lighting comprising a light input area () for receiving light, a first surface () having a first bezier curve, and a second surface () having a second bezier curve. The first and second bezier curves are independently selected with respect to each other, and arranged such that the optical device is rotational asymmetric with respect to its center axis. Received light which is reflected in the first surface is reflected in a direction towards the center axis, and received light which is reflected in the second surface is reflected in a direction away from the center axis, thereby providing vertical and horizontal homogeneous illumination distribution in a predefined area, which area is illuminated under an angle. Thus, a vertical intensity distribution can be selected to be narrow, while simultaneously the horizontal intensity can be selected to be wide, which is advantageous for providing intercanopy lighting at a desired target zone for plants. Simultaneously, the vertical intensity distribution is asymmetric, which is advantageous for meeting homogeneity criteria for lighting of plants.