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

March 31, 2025
Enhance your remote sensing capabilities with Chroma's precision-engineered optical filters, designed for applications such as environmental monitoring, geospatial mapping, and...
March 31, 2025
Designed for compatibility with a wide range of systems, Chroma's UV filters are engineered to feature high transmission, superior out-of-band blocking, steep edge transitions...
March 31, 2025
Discover strategies to balance component performance and system design, reducing development time and costs while maximizing efficiency.
March 31, 2025
Explore the essential role of optical filters in enhancing Raman spectroscopy measurements including the various filter types and their applications in improving signal-to-noise...

Voice your opinion!

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