Michael E Bass

US Patent:

6501590, Dec 31, 2002

Filed:

Oct 12, 2001

Appl. No.:

09/976921

Inventors:

Michael Bass - Orlando FL
Hans Jennsen - Palm Harbor FL

Assignee:

University of Central Florida - Orlando FL

International Classification:

G02F 1361

US Classification:

359326, 365151, 501 40, 501126, 501152

Abstract:

Two and three dimensional color image displays. The displays include a display medium having a substantially uniform dispersion of red, green and blue visible light emitting particles sized between approximately 0. 5 to approximately 50 microns therethrough. The particles can be dye doped polymethylmethacrylate(pmma) plastic, and the display medium can be pmma, acrylic plastic or glass. Other particles can be used such as rare earth doped crystals. The two dimensional display uses three laser sources each having different wavelengths that direct light beams to each of three different types of particle in the display medium. Light is absorbed by the particles which then become excited and emit visible fluorescence. Modulators, scanners and lens can be used to move and focus the laser beams to different pixels in order to form the two dimensional images having different visible colors.

US Patent:

6654161, Nov 25, 2003

Filed:

Jul 31, 2001

Appl. No.:

09/919131

Inventors:

Michael Bass - Orlando FL
Alexandra Rapaport - Winter Park FL
Hans Jennsen - Palm Harbor FL

Assignee:

University of Central Florida - Orlando FL

International Classification:

G02F 135

US Classification:

359326, 365151, 501123, 501126, 501904

Abstract:

A two and three dimensional display based on up conversion of near infrared light to the visible. The display medium is a transparent polymer containing particles of crystals doped with Yb and other rare earth ions. The Yb ions absorb light from a commercially available diode laser emitting near 975 nm and transfer that energy to the other dopant ions. Using a fluoride crystal host, NaYF , co-doped with Tm ions we obtain blue light at Ë480 nm, with Ho or Er ions we obtain green light at Ë550 nm and with Er we obtain red light at Ë660 nm. The display medium is also used with a preferred component layout with experimentation test data, along with applications for full color, high brightness, high resolution, displays.

US Patent:

6844387, Jan 18, 2005

Filed:

Jul 31, 2001

Appl. No.:

09/919130

Inventors:

Michael Bass - Orlando FL, US
Kevin Belfield - Oviedo FL, US

Assignee:

University of Central Florida - Orlando FL

International Classification:

C08K 310

US Classification:

524403, 524130, 524132, 524413

Abstract:

A two and three dimensional display medium having a novel transparent polymer composite containing particles of crystals doped with Yb and other rare earth ions. The polymer composite creates homogeneously dispersed compositions without cracking or delamination of the film and can be used for various optical applications.

US Patent:

6897999, May 24, 2005

Filed:

Dec 26, 2002

Appl. No.:

10/329920

Inventors:

Michael Bass - Orlando FL, US
Jason Eichenholz - Orlando FL, US
Alexandra Rapaport - Winter Park FL, US

Assignee:

The Research Foundation of the University of Central Florida - Orlando FL

International Classification:

G02F001/35
G02F002/02
G11C013/04

US Classification:

359326, 365151, 501123, 501126, 501904

Abstract:

Two, three dimensional color displays having uniform dispersion of red, green and blue visible light emitting micron particles. Pumping at approximately 976 nm can generate green and red colors having an approximately 4% limit efficiency. One source can generate three colors with approximately limit efficiency. Modulators, scanners and lens can move and focus laser beams to different pixels forming two dimensional color images. Displays can be formed from near infrared source beams that are simultaneously split and modulated with micro electro mechanical systems, spatial light modulators, liquid crystal displays, digital micromirrors, digital light projectors, grating light valves, liquid crystal silicon devices, polysilicon LCDs, electron beam written SLMs, and electrically switchable bragg gratings. Pixels containing: Yb,Tm:YLF can emit blue light, Yb,Er(NYF) can emit green light, and Yb,Er:KYF and Yb,Ef:YFcan emit red light.

US Patent:

6975465, Dec 13, 2005

Filed:

Apr 3, 2003

Appl. No.:

10/407523

Inventors:

Te-Yuan Chung - Orlando FL, US
Michael Bass - Orlando FL, US
Daniel P. Rini - Orlando FL, US
H. Randolph Anderson - Clermont FL, US
Louis Chow - Winter Park FL, US

Assignee:

University of Central Florida Research Foundation, Inc. - Orlando FL

International Classification:

G02B005/04
G02B027/14
H01S003/08

US Classification:

359831, 359638, 372100, 372 99

Abstract:

The subject invention relates to beam control prisms and the use of a beam control prism to modify the beam properties of light emitted from an edge emitting diode laser. The subject invention can utilize a beam control prism placed next to a diode laser bar. The subject beam control prism can have, for example, a curved surface and/or a high reflective coated surface for a diode laser wavelength. The curved surface can collimate the fast axis divergence and the mirror surface can change the beam direction. The subject curved surface beam control prisms can incorporate one or more features, such as parabolic reflecting surface, elliptical exit surface with flat reflecting surface, and a hyperbolic entrance surface with flat reflecting surface.

US Patent:

7075707, Jul 11, 2006

Filed:

May 7, 2004

Appl. No.:

10/841188

Inventors:

Alexandra Rapaport - Orlando FL, US
Anne Janet Milliez - Orlando FL, US
Michael Bass - Orlando FL, US
Hans Jenssen - Palm Harbor FL, US

Assignee:

Research Foundation of the University of Central Florida, Incorporated - Orlando FL

International Classification:

G02F 1/355
G11C 13/04

US Classification:

359326, 365151

Abstract:

Methods and compositions for using an up-conversion phosphor as an emitting material in a reflective displays and Polymer compositions for display mediums, and blue green red (BRG) display mediums. Roles of the pumping duration and character on the temperature and the efficiency of the up-conversion process in (Ytterbium, Erbium or Thulium) co-doped fluoride crystals are set forth. Methods, compositions and display mediums for using up-conversion phosphors in both reflective and transmissive displays in which the substrate and pixel shapes are designed to maximally remove heat deposited in the emitting material and thereby improve the efficiency of up conversion.

US Patent:

7088040, Aug 8, 2006

Filed:

Jun 26, 2003

Appl. No.:

10/606551

Inventors:

Alfred D. Ducharme - Orlando FL, US
Michael Bass - Orlando FL, US
Alexandra Rapaport - Orlando FL, US

Assignee:

University of Central Florida Research Foundation, Inc. - Orlando FL

International Classification:

H01J 1/62
H05B 33/00

US Classification:

313512, 445 23

Abstract:

Upconversion methods and devices that converts near-infrared light to the visible spectrum using a rare-earth-doped crystalline host for use as general and decorative lighting. The pseudo-monochromatic output of the processes can be specified by altering the amount and type of rare-earth material used and by selection of an appropriate host. Using rare-earth materials such as ytterbium-erbium or ytterbium-thulium can produce red, green and blue emissions, where the additive mixture of these colors yields a high-quality white light. The materials can be adjusted to achieve white light with any color temperature and high color-rendering index (CRI) for any general and decorative lighting applications both indoors and outdoors.

US Patent:

7126974, Oct 24, 2006

Filed:

Apr 7, 2004

Appl. No.:

10/819554

Inventors:

Jun Dong - Tokyo, JP
Michael Bass - Orlando FL, US

Assignee:

University of Central Florida Research Foundation, Inc. - Orlando FL

International Classification:

H01S 3/06

US Classification:

372 67, 372 75, 372 70

Abstract:

Systems, configurations and methods of using laser diodes in ring-shaped arrays placed a distance away from thin disk solid-state laser gain media, which provide uniformly absorbed pump power distribution with high absorption efficiency. This results in major improvements in the scalability and ruggedness of such lasers and disk laser amplifiers. Use of the diode laser pump configurations of the invention results in compact, robust and scalable lasers that produce high quality, high power outputs.