Optical MEMS Corner Cube Reflector (CCR) Demo
The Tanner MEMS-Based Optical Identification and Communication
System (MOICS) provides secure communication between an interrogator
unit and a remote unit that includes a micromachined corner-cube
Most simply, the interrogator transmits information to the
remote unit using a modulated laser. The remote unit demodulates
the signal and extracts the data.
The applet below should run in a Java-enabled browser (MS
Explorer and Netscape Navigator versions 3.x and 4.x in particular).
Please allow time for all the images to load (approximately
The remote unit can communicate back to the interrogator
by using its micro-CCR to encode information in the signal
it reflects back to the interrogator. By using the interrogator's
laser signal to transmit information, the remote unit requires
minimal power and can be quite compact. (The actual process
is somewhat more complicated so that the signal can be successfully
isolated from other light sources and to increase the signal
to noise ratio.)
This research has been sponsored by the Defense
Advanced Research Projects Agency (DARPA).