Hexflash phase analysis circuit. Phase unwrapping plus a smoothing filter. Resolution can be improved to better than 100 prad by smoothing at a 3.3-KHz sample rate with an operating range of 18 degrees. Optical path difference is independent of five degrees of freedom with angular sensitivity in only one degree of freedom. Necessary parallelism of the parallel mirrors is less than the normally required Fabry-Perot tolerance.
Rotor is mounted as a vertical pendulum from a pair of strings providing vertical tilt measurement.
Three sensing detectors view light through a lenticular screen causing splaying of the incident light beam pair. Reference Lawrence N. Mertz, Ph.D., Technical Consultant. A technique for a breast cancer study consists of automatic repositioning of a light source to a number of positions. The team's goal is to obtain near-IR images and magnetic resonance images simultaneously. This increases the quality of the interpretations of the magnetic resonance examination.