Stereoscopic glasses using tilted filters

Filter glasses for use by an observer of a stereoscopic digital display system that displays stereoscopic images including first-eye images and second-eye images on a display surface, the filter glasses comprising:

• a first-eye filter having a front surface positioned for facing the display surface and an opposite back surface and having transmission characteristics to substantially transmit light from the first-eye images and block light from the second-eye images;
• a second-eye filter having a front surface positioned for facing the display surface and an opposite back surface and having transmission characteristics to substantially transmit light from the second-eye images and block light from the first-eye images;
• and
• frame having arms and rims, the arms extending along a horizontal axis from the rims, the frame being adapted to position the first-eye filter in front of the observer's first eye and to position the second-eye filter in front of the observer's second eye, the rims holding the first-eye filter and the second-eye filter at a tilt angle relative to a vertical axis such that top edges of the first-eye filter and the second-eye filter are closer than bottom edges of the first-eye filter and the second-eye filter to a vertical plane that intersects ends of the arms that is opposite to the rims to reflect light from the second-eye images and light from the first-eye images in a direction that is away from the display surface and away from other observers positioned in front of the observer in a theatre,
• wherein the tilt angle is an amount that is based on a position of a seating area in the theatre relative to the position of the display surface in the theatre.