SUNNYVALE, CA — Jan. 20, 2013: SBG Labs has revealed that is has licensed a manufacturer to use its waveguide based laser de-speckling and beam shaping technology. The licensee was not disclosed, but the technology will show up in commercial pico projector products in 2013.
Laser de-speckling and beam shaping is required in micro-display based projection or near-to-eye systems. Speckle can be both fatiguing to look at and reduce image quality. Laser beam shaping is needed to ensure homogenized, uniform illumination fills the imager. There are several ways to accomplish these tasks with various degrees of cost and complexity. But almost all solutions use bulky refractive optical elements or moving parts to achieve these goals.
SBG Labs has leveraged its Switchable Bragg Grating technology to develop planar diffractive optical elements that accomplish this goal without moving parts, all in a solid state “waveguide based” package. And, its solution is very small–a key consideration in pico projectors.
SBG Labs diffractive optical elements are fabricated using holographical defined patterns on clear optical substrates. By using diffractive instead of refractive optics, optical functions like focus and beam expansion can be accomplished in planar elements. In addition, since these elements are based on a liquid crystal based structure, they are electrically switchable. That means multiple optical patterns and functions can be created and modulated at high frequency or as needed to perform the desired optical functions.
“These innovations have been protected by newly issued patents,” said SBG Labs CTO Jonathan Waldern. “With many follow-on patent filings covering a family of architectures, our licensees understand the value of this unique solution offers to effectively use laser illumination and dramatically reduce the size of the integrated pico projector module illumination optics.”
About SBG Labs, Inc.
Located in Silicon Valley, CA, SBG Labs is the leading optical technology company that has developed a revolutionary electrically switchable holographic device called “Switchable Bragg Gratings,” hence the name SBG Labs. The electro-holographic optical technology merges breakthroughs in nanomaterial science and optical software processing by recording holographic optics into nanocomposite electro-optical material, allowing this technology to be used in many everyday products and applications.