3m Innovative Properties Company

Hewlett-packard Development Company, L.p.

Yarn Chee Poon

Andrew John Ouderkirk

Philip Edwin Watson

Xiaohui Cheng

Stephen J Willett

Kim Leong Tan

Zhisheng Yun

Ravi Palaniswamy

Arokiaraj Jesudoss

David Julius

Chuan Wai Wong

Whee Cheng Ong

Melvin Zin

Kim L Tan

Mei-ling Pan

Chi Ying Lee

Boon Yi Soon

Polarizing beam splitters and systems incorporating such beam splitters are described. More specifically, hybrid polarizing beam splitters and systems with such beam splitters that incorporate polymeric reflective polarizers aligned with MacNeille or wire grid reflective polarizers are described.

Hybrid polarizing beam splitter

The disclosure generally relates to beamsplitters useful in color combiners, and in particular color combiners useful in small size format projectors such as pocket projectors. The disclosed beamsplitters and color combiners include a tilted dichroic reflective polarizer plate having at least two dichroic reflective polarizers tilted at different angles relative to incident light beams, with light collection optics to combine at least two colors of light.

Tilted dichroic polarizing beamsplitter

Titled dichroic polarizing beamsplitter

A light source combines colored light from different LED sources to provide white light output. Multiple LEDs emitting light at different peak wavelengths may be disposed on a flexible substrate, the LEDs being close to an aperture formed in the substrate. Multiple mirrors, including at least one dichroic mirror, are oriented to reflect light from the multiple LEDs into the aperture. The flexible substrate includes a dielectric layer having a cavity region and an adjacent neighboring region that is thicker than the cavity region. The aperture and the multiple LEDs are all disposed in the cavity region of the dielectric layer. An integrating rod may be coupled to the aperture to receive the reflected light from the multiple LEDs.

LED color combiner

Systems and methods for edge detection during an imaging operation are disclosed. In an exemplary implementation, a method may include subdividing an imaging area into a plurality of border detection zones. The method may also include scanning the imaging area including media to be scanned to obtain optical data for each of the plurality of border detection zones. The method may also include identifying at least one edge of the media based on change in the optical data between directly adjacent border detection zones, where the change indicates detection of a moir&#xe9; pattern.

Systems and methods for edge detection during an imaging operation

Growing community of inventors

Singapore, Singapore

Yarn Chee Poon