1
David L Wortman, Sanford Cobb Jr, Mark E Gardiner: Light directing film having variable height structured surface and light directing article constructed therefrom. Minnesota Mining and Manufacturing Company, Jed W Caven, Stephen W Buckingham, Stephen C Jensen, June 23, 1998: US05771328 (257 worldwide citation)

A light directing film including a first surface and a second structured surface. The structured surface includes a repeating pattern of prism zones including at least a first zone having a plurality of prism elements with peaks disposed at a first distance from a reference plane and a second zone h ...


2
Laurence R Gilbert, Andrew J Ouderkirk: Metal-coated multilayer mirror. Minnesota Mining and Manufacturing Co, Gary L Griswold, Walter N Kirn Jr, Stephen W Buckingham, December 16, 1997: US05699188 (240 worldwide citation)

A metal-coated multilayer mirror having high reflectivity and high specularity. The mirror comprises a multilayered polymer film and a reflective metal layer. The multilayered polymer film preferably comprises layers of a crystalline, semi-crystalline, or liquid crystalline material, such as a napht ...


3
Mark B O Neill, Sanford Cobb Jr: Brightness enhancement film with soft cutoff. 3M Innovative Properties Company, Stephen W Buckingham, June 29, 1999: US05917664 (235 worldwide citation)

A brightness enhancement film has a plurality of linear prisms. The prisms are disposed in pairs, each pair having first and second prisms and each prism has a prism angle and a valley angle. Either the prism angles or the valley angles, but not both, are equal.


4
Roger H Appeldorn, Alan G Hulme Lowe, Michael C Lea: Illumination devices and optical fibres for use therein. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Stephen W Buckingham, July 11, 1995: US05432876 (213 worldwide citation)

An optical fibre has a light emitting region. In the light emitting region are reflecting surfaces, at least one of which has a cross sectional area less than that of the fibre. Light striking the reflecting surfaces will be reflected out of the fibre.


5
Gordon D Henson, Michael A Meis, Anthony J Piekarczyk: Optical fiber distribution center. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Stephen W Buckingham, May 30, 1995: US05420958 (196 worldwide citation)

A compact optical fiber distribution center has a housing provided by a pair of stackable containers. One container encloses a fiber connector zone in which a plurality of card-like modules are slidably mounted, normally aligned in single file, and each extending vertically when the distribution cen ...


6
John A Futhey, Michael J Simpson: Multifocal diffractive ophthalmic lenses. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Stephen W Buckingham, July 20, 1993: US05229797 (193 worldwide citation)

A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order.


7
Sanford Cobb Jr, Mark E Gardiner, Keith M Kotchick, Kazuhiko Toyooka, William A Hibbard: Variable pitch structured optical film. 3M Innovative Properties Company, Stephen W Buckingham, July 6, 1999: US05919551 (172 worldwide citation)

The present invention includes a structured optical film with variable pitch peaks and/or grooves to reduce the visibility of moire interference patterns and optical displays incorporating one or more layers of the film. The pitch variations can be over groups of adjacent peaks and/or valleys or bet ...


8
Sanford Cobb Jr: Totally internally reflecting thin, flexible film. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, Stephen W Buckingham, March 6, 1990: US04906070 (167 worldwide citation)

A thin, flexible film made of a transparent polymeric material including a structured surface and an opposite smooth surface, wherein light striking either surface, within certain angular ranges, is totally internally reflected. The structured surface includes a linear array of miniature substantial ...


9
John F Dreyer Jr, Neal T Strand: Light fixture providing normalized output. Minnesota Mining and Manufacturing Company, Donald M Sell, Stephen W Buckingham, December 13, 1988: US04791540 (155 worldwide citation)

A light fixture providing normalized output. An undirected light source is located in an optical cavity having an optical window. A film with a smooth surface and a structured surface is placed in the optical window with the smooth surface facing the interior of the optical cavity. The structured su ...


10
Sanford Cobb Jr: Totally internally reflecting thin, flexible film. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Stephen W Buckingham, October 15, 1991: US05056892 (151 worldwide citation)

A thin, flexible film made of a transparent polymeric material including a structured surface and an opposite smooth surface, wherein light striking either surface, within certain angular ranges, is totally internally reflected. The structured surface includes a linear array of miniature substantial ...