Patent ID: 7154671
Filing Date: 2006-12-26
Classification: G02B,G03B,H04N

Abstract:
1. A method of producing a modulated beam of visible light in which the brightness of the image increases as the distance from the projector lens to a screen increases up to a distance of approximately 10 feet, comprising: [a] producing a beam of electromagnetic energy; [b] separating the beam of electromagnetic energy, into a plurality of separate electromagnetic energy beams each of the separate electromagnetic energy beams having a predetermined orientation of electromagnetic wave field vector; [c] absorbing a portion of electromagnetic energy of at least one of the plurality of separate electromagnetic energy beams at a beam stop, wherein the portion being absorbed is dependent upon the wavelength of the at least one beam; [d] passing a plurality of portions of each separated electromagnetic energy beam through a respective one of a plurality of means for changing the orientation of the electromagnetic wave field vector in a single direction whereby the orientation of electromagnetic wave field vector of the plurality of portions of the electromagnetic energy beams is altered as same passes through the respective one of the plurality of means for changing the orientation of electromagnetic wave field vector; [e] combining more than two separated electromagnetic energy beams into a single collinear beam of electromagnetic energy without previously subcombining any plurality of the separated electromagnetic energy beams; [f] locating a projection means such that the distance of the light path between the projection means and each of the plurality of means for changing the orientation of the electromagnetic wave field vector is substantially equal; [g] passing at least a portion of the single collinear beam of electromagnetic energy to the projection means; [h] locating a surface means up to approximately 10 feet of the projection means; and [i] passing the at least a portion of the single collinear beam of electromagnetic energy from the projection means to the surface means.