EP 0855121 A1 19980729 - HIGH EFFICIENCY PROJECTION DISPLAYS HAVING THIN FILM POLARIZING BEAM-SPLITTERS
Title (en)
HIGH EFFICIENCY PROJECTION DISPLAYS HAVING THIN FILM POLARIZING BEAM-SPLITTERS
Title (de)
HOCHEFFIZIENTE PROJEKTIONSANZEIGE MIT POLARISIERENDEM DÜNNFILM-STRAHLTEILER
Title (fr)
DISPOSITIF D'AFFICHAGE DE PROJECTION EXTREMEMENT EFFICACE POSSEDANT DES DIVISEURS DE FAISCEAU DE POLARISATION A COUCHE MINCE
Publication
Application
Priority
- CA 9700567 W 19970813
- CA 2183188 A 19960813
Abstract (en)
[origin: CA2183188A1] A projection display system includes a thin film polarizing beam splitter/combiner has first and second light transmissive substrates in the form of prisms and a plurality of thin film layers disposed between the prisms. The thin film layers and have predetermined thicknesses and refractive indices which allow unpolarized incident light to be separated into s-polarized and p-polarized light beams. Both frustrated total internal reflection and thin film interference are simultaneously employed to allow s-polarized light to be transmitted and p-polarized light to be reflected over a wide range of wavelengths and angles of incidence. The device further includes two spatial light modulators for encoding an image to be projected. By providing a different signal to each spatial light modulator, a 3 dimensional display results.
IPC 1-7
IPC 8 full level
G02B 27/28 (2006.01); H04N 9/31 (2006.01)
CPC (source: EP)
G02B 27/283 (2013.01); H04N 9/315 (2013.01)
Citation (search report)
See references of WO 9807279A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
DOCDB simple family (application)
CA 2183188 A 19960813; EP 97935403 A 19970813