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:
Mar. 04, 1997
Filed:
Oct. 27, 1995
Takeshi Konno, Shizuoka, JP;
Takeji Ochiai, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An improved optical diffuser comprising a transparent support and an optical diffusing layer which is coated on one surface of the support and comprises an organic polymer binder and organic polymer particles is obtained by selecting the constituents to satisfy the conditions that a difference of refractive index between the binder and particles is not more than 0.05; the polymer particles have a mean particle size of 10 to 21 .mu.m; a weight ratio of the particles to the binder in the diffusing layer is within 1.9 to 2.6; a total weight of the coated polymer binder and particles per unit surface is within 10 to 17 g/m.sup.2 ; and a distribution of the sizes of the polymer particles is not more than 3.5 .mu.m in terms of standard deviation.