Browse Prior Art Database

A TELEPROMPTER WITH HOLOGRAPHIC OPTICAL ELEMENT

IP.com Disclosure Number: IPCOM000027808D
Original Publication Date: 1999-Oct-31
Included in the Prior Art Database: 2004-Apr-09
Document File: 2 page(s) / 41K

Publishing Venue

Xerox Disclosure Journal

Abstract

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.

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XEROX DISCLOSURE JOURNAL

A TELEPROMPTER WITH HOLOGRAPHIC OPTICAL ELEMENT U. S. C1.430/001 Werner E. Haas

Proposed Classification

Int. C1. G03h 1/04

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.

DP5836

XEROX DISCLOSURE JOURNAL - Vol. 24 No. 5 SeptembedOctober 1999 249

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250 XEROX DISCLOSURE JOURNAL - Vol: 24 No. 5 September/October 1999

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