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
Roger H Appeldorn, John C Nelson, Mark E Gardiner, Timothy L Hoopman: Cube-corner retroreflective articles having tailored divergence profiles. Minnesota Mining & Manufacturing Company, Donald M Sell, Roger R Tamte, October 4, 1988: US04775219 (232 worldwide citation)

Cube-corner retroreflective article having improved divergence profiles. The three lateral reflecting faces of the cube-corner retroreflective elements are formed by three intersecting sets of parallel V-shaped grooves, and at least one of the sets includes, in a repeating pattern, at least two groo ...


3
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 ...


4
John C Nelson, Mark E Gardiner, Roger H Appeldorn, Timothy L Hoopman: High efficiency cube corner retroflective material. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, Robert H Jordan, July 3, 1990: US04938563 (137 worldwide citation)

The present invention provides a retroreflective material which is efficient at high angles of incidence and which may be individually tailored so as to distribute light retroreflected by the material into a desired pattern or divergence profile. The retroreflective material of the present invention ...


5
David L Wortman, Mark E Gardiner, Andrew J Ouderkirk, James M Jonza, Michael F Weber: Light fixture having a multilayer polymeric film. 3M Innovative Properties Company, John A Burtis, August 8, 2000: US06101032 (88 worldwide citation)

A polarized light source includes a diffuse light source and a reflective polarizing element placed proximate thereto. The reflective polarizing element transmits light of a desired polarization and reflects light of another polarization back into the diffuse source where it is randomized. Some of t ...


6
Leland R Whitney, Gary T Boyd, Keith M Kotchick, Kenneth A Epstein, Sanford Cobb Jr, Philip E Watson, David J Lamb, Mark E Gardiner: Light guide for use with backlit display. 3M Innovative Properties Company, Stephen W Buckingham, June 10, 2003: US06576887 (88 worldwide citation)

A light guide including a light guide body having a light re-directing side positioned opposite from a light output side. A plurality of elongate prisms are located adjacent the light output side of the light guide body. The prisms extend side-by-side relative to one another along lengths. The prism ...


7
Mark E Gardiner, Sanford Cobb, Kenneth A Epstein, Wade D Kretman: Optical film with variable angle prisms. 3M Innovative Properties Company, March 12, 2002: US06356391 (85 worldwide citation)

An optical turning film has a first surface including an array of prisms. The array has a plurality of first prisms, with each of the first prisms having a first prism configuration, and a plurality of second prisms, with each of the second prisms having a second prism configuration different from t ...


8
Mark E Gardiner, Sanford Cobb, Wade D Kretman: Blacklight with structured surfaces. Stephen W Buckingham, May 16, 2006: US07046905 (82 worldwide citation)

A backlight includes a lightguide, a light source disposed with respect to the lightguide to introduce light into the lightguide and a turning film. Optical structures are formed in one of an output surface and a back surface of the lightguide. The optical structures are arranged to extract light fr ...


9
Mark E Gardiner, Sanford Cobb, Kenneth A Epstein, Wade D Kretman: Optical element having programmed optical structures. 3M Innovative Properties Company, Stephen W Buckingham, January 18, 2005: US06845212 (69 worldwide citation)

An optical element, such as a lightguide or an optical film, is formed with a predetermined, programmed pattern of optical structures. The optical structures may be arranged to selectively correct for non-uniformities in the output a lightguide, or may be arranged to otherwise enhance the performanc ...


10
Mark E Gardiner, Sanford Cobb, Kenneth A Epstein, Wade D Kretman: Optical film with variable angle prisms. 3M Innovative Properties Company, Stephen W Buckingham, March 16, 2004: US06707611 (56 worldwide citation)

An optical turning film has a first surface including an array of prisms. The array has a plurality of first prisms, with each of the first prisms having a first prism configuration, and a plurality of second prisms, with each of the second prisms having a second prism configuration different from t ...