| 摘要 |
A projected image viewer is adapted to receive and movably support a plate-like carrier which, in turn, can slidingly support a microfiche or similar multi-image-containing medium of the type having projectable images arranged in rows and columns. The carrier has an aperture across which rows of the images can be moved by sliding of a supported microfiche on the carrier in a first direction. The carrier and supported microfiche can be incrementally received in or withdrawn from the viewer in directions orthogonal to the first direction so that any image on a supported microfiche can be positioned for projection by movement of the microfiche on the carrier and movement of the carrier into and out of the viewer. A pair of opposed members, located on the carrier, are adjustable to support for movement in the first direction any one of a plurality of sizes of such type mediums. The carrier and the viewer have a plurality of detent elements which cooperate upon incremental receipt and/or withdrawal of the carrier for indicating alignment of an image row with the projection system of the viewer.
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