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Stereo projection of pictures using overhead projector - has projection condenser lenses adapted to split light from light source before passage through pictures
Stereo projection of pictures using overhead projector - has projection condenser lenses adapted to split light from light source before passage through pictures
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机译:使用高架投影仪对图片进行立体投影-具有投影聚光镜,可在通过图片之前将来自光源的光分开
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摘要
The device for the projection of stereo pictures is constructed from an overhead type projector system, and the condenser lens system is so reconstructed as to split the light emanating from a conventional light source and pass it through the projection stage, in the beams, one beam passing through each of the two stereo pictures. The picture holders are capable of being moved relative to one another by means of a pusher crank motion to ensure correct alignment of the projected images. The condenser consists of two fresnel lenses, one for each stereo picture; and it may consist of two layers. The first layer may be a single fresnel lens which refracts the divergent light rays from the lamp until they are parallel, and the two lenses in the second layer make the rays converge.
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