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Old 08-08-2012, 01:37 AM #1
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Default Unique Optics Design Combines Modulated RGB LDs

Unique Optics Design Combines Modulated RGB LDs
________________________________________
Posted 07 Aug 2012 - Optics.org
STMicro steps up pico-projector development
Quote:
Swiss-headquartered STMicroelectronics, rated as the world’s leading maker of micro-electro-mechanical systems (MEMS) components, has taken a major step into the emerging market for pico-projectors following a deal with the Israeli start-up bTendo.
Quote:
In the bTendo optical design, each of the red, green and blue laser diodes is accompanied by a circularization lens and a collimation lens. The three emitted beams are initially circularized, then collimated according to the required beam parameters and projected towards the beam-forming subsystem.

This subsystem uses what bTendo calls a unique optical design to combine the three modulated light sources into a single red/green/blue light beam that is then directed towards the key part of the company’s design - the spatial modulator.

The modulator comprises a pair of uniaxial, MEMS-based scanning micromirrors that reflect the combined light beam. These scan in both horizontal and vertical directions, yielding a pixel-by-pixel generation of a focus-free high-definition image projected onto the closest available surface.

Formerly known as “TeraOp Displays”, bTendo was started up by a team of Israeli high-tech entrepreneurs back in 2006, and raised $7 million in venture capital funding from Carmel Ventures and BlueRun Ventures shortly afterwards.
Quote:
According to STMicroelectronics, the bTendo technology represents the smallest and most efficient projector yet to become available in the market – meaning that it will fit inside even the slimmest devices.
Projector phone: Samsung's Galaxy Beam



Edit: then collimated according to the required beam parameters - Surely they mean not combined collimation but rather each individual wavelength is collimated separately, right?



Paraphrased excerpt from Laser and Gaussian Beam Propagation and Transformation:
"The wavelength of the laser radiation, the beam waist diameter, the beam divergence angle, and the Rayleigh range are the four parameters that completely describe a gaussian beam. Using this relationship, a good collimation (very low value of the divergence) will be obtained when the beam is wide, conversely a high focused beam will be obtained by allowing a large divergence angle." i.e. Collimation for "a" specific wave length dictated by "a" discrete set of Gaussian beam parameters . . .
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Old 08-08-2012, 01:57 AM #2
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Default Re: Unique Optics Design Combines Modulated RGB LDs

That's going to be one expensive harvest! Looks like a neat phone though, I wonder how much space on the inside the projector is taking up.
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Old 08-08-2012, 02:04 AM #3
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Default Re: Unique Optics Design Combines Modulated RGB LDs

Quote:
Originally Posted by ARGLaser View Post
That's going to be one expensive harvest! Looks like a neat phone though, I wonder how much space on the inside the projector is taking up.
Probably a good portion of the phone. There was a ton of news coverage WAAY back in the day about how cellphone size is bottle necked by how large our fingers are. Then again you never know
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Old 08-08-2012, 03:21 AM #4
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Default Re: Unique Optics Design Combines Modulated RGB LDs

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Originally Posted by jeffreythe00 View Post
Then again you never know
Yeah I do. :P
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Old 08-08-2012, 03:21 AM #5
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Default Re: Unique Optics Design Combines Modulated RGB LDs

circularizing I guess meaning it makes the beam cross section circular? Why not square-ize the beams? Well, some companies tried, using older frequency-doubled IR tech., maybe now that all three components are direct injection devices this will catch on more.
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