EP 1000377 A1 20000517 - THREE DIMENSIONAL IMAGE DISPLAY
Title (en)
THREE DIMENSIONAL IMAGE DISPLAY
Title (de)
DREIDIMENSIONALE BILDANZEIGEVORRICHTUNG
Title (fr)
AFFICHEUR D'IMAGES EN TROIS DIMENSIONS
Publication
Application
Priority
- GB 9802360 W 19980806
- GB 9716689 A 19970807
Abstract (en)
[origin: WO9908145A1] The 3-D image display consists of a pixellated display (11) that is illuminated through a beam splitter (16). A plan mirror (17) is provided on a movable mount (15) so that the mirror may be moved towards or away from an objective lens (12) positioned between the mirror (17) and the beam splitter (16). A quarter wave plate (18) is provided between the beam splitter (16) and the mirror (17) so that light reflected back from the mirror (17) through the quarter wave plate (18) passes straight through the beam splitter (16) to an eyepiece lens (13). Movement of the mirror (17) enables the mirror (17) to act as an optical path length modifier and permits an image from the display (11) to be presented at different focal positions. Rapid cycling through different focal positions results in the image being perceived as a 3-D image. As the objective lens (12) is positioned between the beam splitter (16) and the mirror (17), the objective lens (12) also acts as a demagnifying lens for images from the display (11). Preliminary demagnification of the image reduces the distances the mirror (17) is required to travel to provide the desired changes in focal position. This in turn reduces the demands on the performance of the mount (15), that are considerable in conventional systems where no demagnification is performed. In this way simple optical and mechanical components may be employed in the image display to generate perceived three dimensional images.
IPC 1-7
IPC 8 full level
G02B 27/01 (2006.01); G02B 27/22 (2006.01); H04N 5/64 (2006.01); H04N 13/00 (2006.01); H04N 13/04 (2006.01); H04N 13/393 (2018.01); H04N 13/395 (2018.01); G02B 5/30 (2006.01); G02B 27/00 (2006.01)
CPC (source: EP US)
G02B 27/017 (2013.01 - EP); G02B 27/0172 (2013.01 - EP); G02B 30/24 (2020.01 - EP); G02B 30/54 (2020.01 - EP); H04N 13/32 (2018.04 - EP); H04N 13/322 (2018.04 - EP); H04N 13/344 (2018.04 - EP); H04N 13/346 (2018.04 - EP); H04N 13/393 (2018.04 - EP US); H04N 13/395 (2018.04 - EP US); G02B 5/30 (2013.01 - EP); G02B 2027/011 (2013.01 - EP); G02B 2027/0116 (2013.01 - EP); H04N 13/324 (2018.04 - EP); H04N 13/365 (2018.04 - EP); H04N 13/398 (2018.04 - EP)
Citation (search report)
See references of WO 9908145A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 9908145 A1 19990218; CA 2300047 A1 19990218; EP 1000377 A1 20000517; GB 9716689 D0 19971015; JP 2001512849 A 20010828
DOCDB simple family (application)
GB 9802360 W 19980806; CA 2300047 A 19980806; EP 98937677 A 19980806; GB 9716689 A 19970807; JP 2000506557 A 19980806