| 摘要 |
A projection apparatus for the enlargement of photos and sketches constructed integrally within a small tent so that it may be used without requiring a darkened room for projecting. The tent is placed upon a suitable table and has an opening on one side for accessing its interior. The projection system requires that the photo or sketch be traced onto a clear plastic sheet which is then placed onto a transparent platform located somewhere between a miniature lamp and the projection surface. When the lamp is turned on, an enlarged shadow of the traced image is seen on the projection surface and is then traced onto it. Varying the projected enlargement is achieved buy sliding the lamp holder up and down a linear slide.
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