madmacmo
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Unique Optics Design Combines Modulated RGB LDs
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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 . . .
Attached Thumbnails
________________________________________
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 . . .
Attached Thumbnails
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