John L Rudolph

US Patent:

6490087, Dec 3, 2002

Filed:

Apr 10, 2000

Appl. No.:

09/546241

Inventors:

E. Gregory Fulkerson - Amelia OH
Simon Magarill - Cincinnati OH
John D. Rudolph - Cincinnati OH

Assignee:

U.S. Precision Lens Incorporated - Cincinnati OH

International Classification:

G02B 530

US Classification:

359487, 359485, 359494, 359497, 359900, 349 5, 349 8, 349 9, 353 20, 353 30, 353 31

Abstract:

Optical systems for use with reflective LCDs ( ) are provided. The systems include a polarization beam splitter ( ) which can be composed of polarization beam splitting cubes ( ) having sheet polarizers ( ) and/or half wave plates ( ) at their mating surfaces. By orienting the half wave plates ( ) so that they convert S polarization to P polarization and P polarization to S polarization, the polarization beam splitter ( ) can provide a high contrast ratio at a viewing screen between light from the âonâ and âoffâ pixels of the reflective LCDs ( ).

US Patent:

6764181, Jul 20, 2004

Filed:

May 16, 2002

Appl. No.:

10/147274

Inventors:

Simon Magarill - Cincinnati OH
John D. Rudolph - Cincinnati OH

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G03B 2114

US Classification:

353 20, 359489, 359495, 359583, 385 47

Abstract:

A tilted polarization splitter ( ) for use with a projection lens ( ) and a light modulating panel ( ) is provided. The polarization splitter has an ultra thin substrate ( ) whose thickness is chosen so that the depth of focus of the projection lens in imager space is greater than the astigmatism produced by the splitter at its tilted angle. The polarization splitter can be a wire grid polarizer, polarization coating, or birefringence film carried by or formed on the ultra thin, plane parallel plate substrate.

US Patent:

6970289, Nov 29, 2005

Filed:

Aug 23, 2000

Appl. No.:

10/069695

Inventors:

Roy Auerbach - Cincinnati OH, US
Joachim Bunkenburg - Victor NY, US
Brahim Dahmani - Montrouge, FR
E. Gregory Fulkerson - Amelia OH, US
Simon Magarill - Cincinnati OH, US
John D Rudolph - Cincinnati OH, US

Assignee:

Corning Incorporated - Corning NY

International Classification:

G03B021/56
G03B021/60

US Classification:

359457, 359460

Abstract:

A rear projection screen for use with a projection lens which has an exit pupil () is provided. The screen has a light entering side and a light exiting side and comprises in order from said light entering side to said light exiting side: (a) a Fresnel structure (); (b) a lenslet array (); and (c) an opaque layer () comprising a plurality of pinholes, said pinholes being at locations which correspond to the images of the exit pupil formed by the combination of the Fresnel structure and the lenslet array.

US Patent:

6972810, Dec 6, 2005

Filed:

Nov 1, 2001

Appl. No.:

10/169282

Inventors:

Simon Magarill - Cincinnati OH, US
John D. Rudolph - Cincinnati OH, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

G02F001/1335
G03B021/14

US Classification:

349 8, 349 9, 353 20, 353 33

Abstract:

Optical systems for projection optical devices which employ reflective LcoS panel () are provided. The systems provide high contrast, compact size, and high light throughput.

US Patent:

7430355, Sep 30, 2008

Filed:

Sep 27, 2006

Appl. No.:

11/535801

Inventors:

Jason C. Heikenfeld - New Richmond OH, US
Andrew J. Steckl - Cincinnati OH, US
John D. Rudolph - Cincinnati OH, US

Assignee:

University of Cincinnati - Cincinnati OH

International Classification:

G02B 6/10
F21V 7/04

US Classification:

385129, 385 27, 385 31, 385 33, 385 39, 385130, 385901, 362 84, 362600, 362601, 362608, 362609, 362615, 362629

Abstract:

A signage device comprising one or more light sources, a waveguide or arrangement of waveguides and photoluminescent features coupled thereto. In one embodiment, a waveguide is adapted to receive light of a first wavelength and the photoluminescent features are adapted to emit light of a second wavelength in response to receiving light of the first wavelength.

US Patent:

61150827, Sep 5, 2000

Filed:

Sep 4, 1998

Appl. No.:

9/142336

Inventors:

John D. Rudolph - Cincinnati OH

Assignee:

U.S. Precision Lens Inc. - Cincinnati OH

International Classification:

H04N 574
H04N 931

US Classification:

348749

Abstract:

A coupler system (13) for mounting a projection lens (15) to a cathode ray tube (16) in a projection television (10) is provided. The system includes a first member (20) composed of a heat and chemical resistant plastic and a second member (22) composed of metal. The second member (22) is mounted to the periphery (18) of the faceplate (17) of the cathode ray tube (16) to provide a high level of heat transfer from the tube. The second member also absorbs x-rays emitted by the tube. The first member can be readily molded from high performance plastic resins and thus reduces the overall cost of the coupler system compared to couplers composed entirely of metal.

US Patent:

20170357086, Dec 14, 2017

Filed:

Aug 7, 2017

Appl. No.:

15/670438

Inventors:

- Cincinnati OH, US
John David Rudolph - Cincinnati OH, US
Kenneth A. Dean - Phoenix AZ, US

International Classification:

G02B 26/00
G02F 1/17
G03F 7/24
B32B 37/00
B32B 37/18
B32B 38/00
B32B 37/12

Abstract:

A method for manufacturing a freestanding film having at least one population of through holes cumulatively totaling at least 1% of the film area, wherein the standard deviation of hole diameters is less than 25% and a thickness less than 25 micrometers, The film provides a carrier substrate, a photo-curable material, a release agent and deposits a photo-curable material on the substrate, selectively curing the material and leaving uncured material in the pattern of holes, dissolving away the uncured material and removing the cured material from the carrier substrate. Methods and apparatus are described.

US Patent:

20150293347, Oct 15, 2015

Filed:

Apr 2, 2015

Appl. No.:

14/676956

Inventors:

- Cincinnati OH, US
John David Rudolph - Cincinnati OH, US
Kenneth A. Dean - Phoenix AZ, US

International Classification:

G02B 26/00
B32B 37/10
B32B 37/12
B32B 38/00
G03F 7/20
B32B 37/18

Abstract:

A method for manufacturing a freestanding film having at least one population of through holes cumulatively totaling at least 1% of the film area, wherein the standard deviation of hole diameters is less than 25% and a thickness less than 25 micrometers, The film provides a carrier substrate, a photo-curable material, a release agent and deposits a photo-curable material on the substrate, selectively curing the material and leaving uncured material in the pattern of holes, dissolving away the uncured material and removing the cured material from the carrier. Methods and apparatus are described.