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The Universal Beam Splitter. The UBS mounts in any standard 1" diameter mirror mount and behaves like a very low loss non-polarizing beam splitter cube with the added benefit that the reflectivity of the beam splitter can be adjusted from 1% to 90% for any wavelength. As the UBS is rotated, the transmitted and reflected beams remain at 90 degrees. A simple marvel of optical engineering.

Far from what we have. This is about a moving object with a grating on it and a laser beam diffracting on it and detecting changes in the freq of res.  

MEMS Optical's Products

While it may sound like the stuff of science fiction, Jansen isn't the only one to take notice of just how useful a real functioning tricorder would be - especially as a medical tool. Telecommunications giant Qualcomm Inc this year launched the "Tricorder X-Prize Contest" with the slogan "Healthcare in the palm of your hand." Qualcomm hopes to motivate developers with a $10 million prize to make medical tricorders a reality. Wanda Moebus of the Advanced Medical Technology Association, who is not affiliated with Jansen or Qualcomm, told Reuters the X-Prize "is really cool," but cautioned that making a real medical tricorder device "would have to be measured on its safety and effect, like all other medical technologies." Jansen said he has been approached by "a couple of teams" about the X Prize, but added that his prototypes are more for science research than medical tools. Besides, he said he already is on to his next frontier, making a sort of "replicator," another "Star Trek" device that will create 3D objects and foods that are dimensional copies of real items. Jansen's "replicator" is a 3D printer, which in itself is not really new, but the scientist thinks about it in terms reminiscent of "Star Trek's" famous prologue. It's "like nothing we've ever seen before," Jansen said.