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AssigneeAgence Nationale de Valorisation de la Recherche (ANVAR)
InventorGeorges E. Grenier
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The present invention relates to a projector comprising two optical systems enabling transparencies to be projected with cross-fading, in 3-D and with double-width panning, said projector operating with a single transparency distributing and recuperating magazine, in which the transparencies are arranged in the same order as if they were to pass in a single-lens projector; said projector comprises four parallel transparency guide slots, which are parallel to one another and transverse with respect to the axes of two optical systems in which the transparencies circulate in pairs, said guide slots being extended by a switching means whose role is to cause the transparencies which have already been projected to pass from the forward guide slots into the return guide slots, and thus to cause the transparencies to return to the same compartment of the same magazine from which they left. These displacements are possible due to a recuperator having multiple functions. Simultaneously to the displacement of the recuperator, a double potentiometer in relation with an electronic device effects cross-fading. This projector may be used for simple projection, but without a gap between two transparencies, for 3-D and for double-width panning.
A transparency projector having optical axes through projection windows in which the transparencies are removed from the compartments of a single magazine and are replaced therein in identical manner after projection, said projector comprising at least two juxtaposed optical systems allowing the simultaneous or successive projection of as many transparencies as there are optical systems, each optical system being associated with an advance conveyance channel and a return conveyance channel, a drive assembly moving the transparencies in the respective advance conveyance and return conveyance channel between their respective compartment and projection window, wherein the conveyance channels are in the form of guide slots transverse with respect to the optical axes, and transfer means located opposite the magazine with respect to the optical systems for the simultaneous transfer of the transparencies from the advance guide slots to the return guide slots so that each transparency, under the effect of the drive assembly, effects a forward movement and a return movement in the course of which it moves twice in the front of the projection window in each optical system.
Transparency projector of the type in which the transparencies are removed from the compartments of a single magazine and are replaced therein in identical manner after projection, said projector comprising
Dependencies are inferred from the claim text.