| 摘要 |
<p>The microfilm or microfiche viewing appts. which can be folded, and is suitable as a suitcase portable unit, and provides a facility for back projection screen viewing or reflected light screen viewing. For back projection, screen viewing a translucent screen (9) is opened to a 45 deg. viewing position allowing a mirror (10) to drop free on its hinge (12) into a vertical position. A microfiche is placed in a carrier (2) for projection through the objective lens (4) onto a latched mirror (5), the back of which supports the base of the translucent screen, onto the dropped mirror and then the screen. For reflected light projection, the translucent screen is latched back against the inside of the case lid (8) to sandwich the hinged mirror (10) so that the picture is projected directly onto the screen from the latched mirror (5).</p> |
