Abstract: An apparatus for projecting a moving or still stereo or multichannel image. At least a first and at least a second video projector, or the like, project images intended for the left and the right eye of a viewer alternately in time and in synchronization with the function of shutter glasses or the like worn by the viewer. The video projectors are provided with a shutter/several shutters to prevent the projection of an image, if necessary. The control of the shutter is arranged in synchronization with the showing of the images in the following manner. When the right-eye shutter of the shutter glasses or the like worn by the viewer is open, the shutter in connection with at least the second projector projecting the image intended for the left eye is/are controlled to be shut.

Abstract: The invention relates to an apparatus for projecting a moving or still stereo or multichannel image (IM), said apparatus comprising at least a first (R) and at least a second (L) video projector, or the like, for projecting images intended for the left and the right eye of a viewer (H) alternately in time and in synchronization with the function of shutter glasses (G) or the like worn by the viewer. According to the invention, said video projectors are liquid crystal video projectors (PI) in which liquid crystal video projectors (PI) the illuminating, and thereby image-projecting light source (FP) of the liquid crystal matrix (LC) is a light source (FP) that produces light in a pulsed manner, the pulsing of said light source (FP) being arranged to occur in synchronization with the presentation of images. The pulsing of light sources according to the invention enables the projection of high-quality stereo image by means of affordable liquid crys-tal video projectors functioning at the normal image frequency.

Abstract: The invention relates to an apparatus for projecting a moving or still stereo or multichannel image (IM), said apparatus comprising at least a first (R) and at least a second (L) video projector, or the like, for projecting images intended for the left and the right eye of a viewer (H) alternately in time and in synchronization with the function of shutter glasses (G) or the like worn by the viewer. According to the invention, said video projectors are liquid crystal video projectors (PI) in which liquid crystal video projectors (PI) the illuminating, and thereby image-projecting light source (FP) of the liquid crystal matrix (LC) is a light source (FP) that produces light in a pulsed manner, the pulsing of said light source (FP) being arranged to occur in synchronization with the presentation of images. The pulsing of light sources according to the invention enables the projection of high-quality stereo image by means of affordable liquid crys-tal video projectors functioning at the normal image frequency.

Abstract: The invention relates to an apparatus for projecting a moving or still stereo or multichannel image (IM), said apparatus comprising at least a first (R) and at least a second (L) video projector, or the like, for projecting images intended for the left and the right eye of a viewer (H) alternately in time and in synchronization with the function of shutter glasses (G) or the like worn by the viewer. According to the invention, said video projectors (L, R) are provided with a shutter means/several shut-ter means (DS, LCS) to prevent the projection of an image, if necessary, the control of said shutter means being arranged in synchronization with the showing of the images in the following manner.

Abstract: The invention relates to a method for producing a non-solid projection screen (3), projection volume (8), or the like, the method comprising the steps of supplying and/or forming light scattering/reflecting scattering centres (4) to a substantially laminar transfer flow (2) to be transferred by said transfer flow (2). In accordance with the invention, the scattering centres (4) are supplied and/or formed to the transfer flow (2), to the central/inner parts thereof that remain laminar, away from the direct vicinity of the interfaces between the transfer flow (2) and the area surrounding thereof, in order to keep the projection screen in shape. In accordance with the invention, as the scattering centres (4) can be used light elastically or non-elastically scattering, solid liquid or gaseous substance.

Abstract: The invention relates to a method for producing a non-solid projection screen (3), projection volume (8), or the like, the method comprising the steps of supplying and/or forming light scattering/reflecting scattering centres (4) to a substantially laminar transfer flow (2) to be transferred by said transfer flow (2). In accordance with the invention, the scattering centres (4) are supplied and/or formed to the transfer flow (2), to the central/inner parts thereof that remain laminar, away from the direct vicinity of the interfaces between the transfer flow (2) and the area surrounding thereof, in order to keep the protection screen in shape. In accordance with the invention, as the scattering centres (4) can be used light elastically or non-elastically scattering, solid liquid or gaseous substance.