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2. Liquid light show - Wikipedia

   en.wikipedia.org/wiki/Liquid_light_show

   Light from a liquid light show, being projected behind a guitarist Layers of colored mineral oil and alcohol move over the projector lens and produce changing color patterns. Liquid light shows (or psychedelic light shows ) [ not verified in body ] are a form of light art that surfaced in the early 1960s as accompaniment to electronic music and ...

3. 5 Items From the 1970s That Are Worth a Lot of Money - AOL

   www.aol.com/5-items-1970s-worth-lot-170007423.html

   The late 1970s witnessed the advent of personal electronics that changed entertainment forever. The Sony Walkman TPS-L2, introduced in 1979, is a notable example. Now, it’s fetching upwards of ...

4. Bell & Howell - Wikipedia

   en.wikipedia.org/wiki/Bell_&_Howell

   35mm filmstrip projectors; Overhead presentation projectors (all models) Stereo cameras and stereo slide projectors through its TDC subsidiary; Slide Cube Projector, circa 1970; In 1934, Bell & Howell introduced their first amateur 8mm movie projector, in 1935 the Filmo Straight Eight camera, and in 1936 the Double-Run Filmo 8.

5. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed. However some differences are necessitated by the much larger size of the transparencies used (generally the size of a printed page), and the requirement ...

6. Philips DP70 - Wikipedia

   en.wikipedia.org/wiki/Philips_DP70

   The DP70 (DP stands for "Double Projector") was invented and developed by a team headed by Jan-Jacob Kotte of Philips between 1952 and 1954, as part of the Todd-AO system. A core objective of the project was to create a single machine that could project both the Todd-AO 5/70 format and the 4/35 format which was, and was likely to remain, the ...

7. Try These Christmas Light Projectors for the Most Stunning ...

   www.aol.com/try-christmas-light-projectors-most...

   The best thing about these projectors is that many of them give the magical effect of outdoor Christmas lights, without any of the hassle of untangling them, hanging them up or even taking them down.