Spatial light modulators: Kits bring digital micromirrors to new applications

April 1, 1997
A digital spatial light modulator produced by Texas Instruments (TI; Dallas, TX), previously distributed only to a limited number of OEM display manufacturers is now available to researchers in the form of an evaluation kit.

A digital spatial light modulator produced by Texas Instruments (TI; Dallas, TX), previously distributed only to a limited number of OEM display manufacturers is now available to researchers in the form of an evaluation kit. Digital micromirror devices (DMDs) are lithographically produced modulators consisting of two-dimensional arrays of independently addressable 16 × 16-µm mirrors that reflect incident light (see Laser Focus World, Aug. 1994, p. 20). Each mirror is mounted on a support post that is in turn mounted on a yoke attached to a pair of torsion hinges that permit the mirror to tilt from 0° to 10°. Mirror position is electrostatically controlledin the "on" position (0° of tilt), the mirror reflects the beam along the optical axis of the system; in the "off" position (10° of tilt), the mirror deflects the beam.

These devices have previously been unavailable to the general researcher because TI has been targeting the display market. Now, two different digital light processing (DLP) kits allow researchers to evaluate the technology for other applications. The basic DLP Digital Video Subsystem includes a DMD image processing board with a 640 × 480 array, a light source, a color filter system, drive electronics, power supply, digital interface card, control software, and full documentation. The subsystem includes all components necessary to interface with a PC.

The second kit includes an optical assembly to focus light onto the DMD chip. When combined with a video graphics source, the system can simulate the operation of a front or rear projection DLP VGA subsystem.

Current areas for investigation with the evaluation kits include confocal microscopy, holographic memory systems, optical computing, optical switching, optical pattern recognition, and three-dimensional displays. The design allows the DMD board to be operated as far as 6 ft away from the computer, making it suitable for laboratory applications.

The company emphasizes that the kits are for research and evaluation purposes only. Digital micromirror devices are still not available for commercial purchase outside of the projection-system OEM agreements currently underway. Kits are available to selected applicants, and prices begin at $5200; for more information, see the TI website at www.ti.com/dlp.

About the Author

Kristin Lewotsky | Associate Editor (1994-1997)

Kristin Lewotsky was an associate editor for Laser Focus World from December 1994 through November 1997.

Sponsored Recommendations

Achromatic Lenses: High-Quality Custom Optics

March 13, 2025
Ensure clarity and accuracy in your optics systems with Lacroix’s achromatic lenses. Explore how our custom solutions minimize chromatic aberration for perfect results.

Manufacturing Considerations for Tolerancing Aspheres

March 13, 2025
Understand the critical factors in manufacturing aspheres and how Lacroix Optics ensures precise tolerancing in every optical component.

Explore Our Videos: Insights into Precision Optics

March 13, 2025
Get an inside look at Lacroix Optics with our collection of informative videos showcasing our capabilities, innovations, and processes.

Optical Assemblies: Reliable and Precise Solutions

March 13, 2025
Ensure your optical system works seamlessly with Lacroix Optics' custom optical assemblies. Discover the precision and reliability we bring to every project.

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!