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2. Opaque projector - Wikipedia

   en.wikipedia.org/wiki/Opaque_projector

   The document camera is also called a desktop presenter unit or opaque projector. Opaque projectors are still in use for tracing, called tracing projectors. A flat or solid original is projected on a larger sheet of paper onto a wall or easel, where the artist or craftsperson can trace the outline reliably. [4] [5]

3. Vitascope - Wikipedia

   en.wikipedia.org/wiki/Vitascope

   Vitascope was an early film projector first demonstrated in 1895 by Charles Francis Jenkins and Thomas Armat. They had made modifications to Jenkins' patented Phantoscope, which cast images via film and electric light onto a wall or screen. The Vitascope is a large electrically-powered projector that uses light to cast images.

4. Laser-powered phosphor display - Wikipedia

   en.wikipedia.org/wiki/Laser-powered_phosphor_display

   The building blocks of every Prysm video wall are the Laser Phosphor Display (LPD) tiles called the TD2. Video walls are implemented using this new generation LPD TD2 tile, a virtually seamless, bezel-free building block. TD2, launched at InfoComm 2013, features increased resolution, brightness and enhanced uniformity.

5. Camera obscura - Wikipedia

   en.wikipedia.org/wiki/Camera_obscura

   While the use of the camera obscura has waxed and waned, one can still be built using a few simple items: a box, tracing paper, tape, foil, a box cutter, a pencil, and a blanket to keep out the light. [82] Homemade camera obscura are popular primary- and secondary-school science or art projects.

6. Projector - Wikipedia

   en.wikipedia.org/wiki/Projector

   A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens , but some newer types of projectors can project the image directly, by using lasers .

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