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:
Jun. 24, 2014
Filed:
Nov. 02, 2010
Katsushi Ono, Ichikawa, JP;
Tokuyuki Nakayama, Ichikawa, JP;
Katsushi Ono, Ichikawa, JP;
Tokuyuki Nakayama, Ichikawa, JP;
Toyobo Co., Ltd., Osaka, JP;
Abstract
A black heat resistant light shading film usable as a shutter blade or a fixed diaphragm, a diaphragm blade for a diaphragm device for a light intensity adjusting module. The black heat resistant light shading film is formed with fine unevennesses at the both surfaces of a resin film having a heat resistance of 155° C. or higher. The resin film is a black film containing a black pigment and an inorganic filler and thickness of the black heat resistant light shading film is 25 μm or less. Surface roughness (arithmetic average height Ra) of the both surfaces is 0.2 to 2.2 μm and an average optical density, which is an index of light shading performance of light in a wavelength region of 380 to 780 nm, is 3.5 or higher.