2 results about "Reference beam" patented technology

A holographic display system provides a holographic image suitable for use as a nightlight in a dimly lit environment wherein the only light in the field of view of the user is essentially the light diffracted into the holographic image being replayed. The holographic display system includes a low watt light source, a hologram recorded with a reference beam matching the beam of the light source employed to replay the hologram, and an enclosing structure for holding the lightsource and hologram in registration wherein the enclosure is configured so that the only light emitted from the display system is emitted from the hologram.

The invention relates to an OCT system with an OCT light source for emitting OCT light into an object beam path and a reference beam path. The system comprises a detector for detecting an interference signal produced by the object beam path and the reference beam path. A polarization-dependent delay element is arranged in the object beam path. The invention also relates to a corresponding OCT method. The invention allows the effects of parasitic reflections to be reduced.