A TELEPROMPTER WITH HOLOGRAPHIC OPTICAL ELEMENT
Original Publication Date: 1999-Oct-31
Included in the Prior Art Database: 2004-Apr-09
Xerox Disclosure Journal
Disclosed is the use of a Holographic Optical Element (HOE) in a visual prompter displaying script inconspicuously to a speaker. Teleprompters traditionally use a cathode ray tube image projected onto an inclined semi-transparent plate that partially reflects and transmits light. Projected text frequently becomes undesirably visible to the audience through scattering. Replacing the semi-transparent plate with a reflection HOE eliminates the scattering. The HOE is used like a head-up display. It is set at a fixed angle of incidence and constructed in a way that reflects selected wavelengths.