Compensate for scene motion

Scene motion normally can not be tolerated in holography.  Scene motion translates into phase differences due to optical path length changes and diffraction pattern changes on the holographic plate.  For small movements, the diffraction pattern changes are negligible and the path length differences can be compensated for with a fringe stabilizer.   Scene motion can also be monitored in real time holographic interferometry by observing the fringe stabilizer output voltage which follows the mirror movement.

Holographic interferometry

A fringe stabilizer can be used to compensate for scene motion and component movement to optimize brightness in multiple exposure holographic interferometry .  For example, in double exposure interferometry, there is no way to tell the difference between the interference fringes caused by induced object motion or component movement.  A fringe stabilizer can compensate for component motion and provide brighter holograms.

Odhner Holographics, P.O. Box 841, Amherst, NH 03031
Phone: (603) 673-8651    Fax: (603) 673-8685