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Worldwide: 3D printing creates mechanical "laser show" using a pointer

Software engineer Evan Stanford created a mechanical “laser show” using 3D-printed gears, cams and supports.

It works by putting a standard pen-type laser pointer between two cams. Cranking a handle turns the cams which bounce the laser pointer up/down and left/right to create projected patterns:

Evan Stanford mechanical laser show 01

By using different cam shapes, different patterns can be projected:

Evan Stanford mechanical laser show cams

Instructions and plans are available online, including Thingiverse 3D printing files.

Stanford noted “At this point I think it is unlikely I will continue the project. But if I did, here’s what I could do:” He then listed adding blinds to make discontinuous patterns, making the device motor driven, and adding a web service to make it easier to create new cam patterns.

From Evan Stanford’s Hackaday.io page, posted in mid-June 2017

US: Laser show company has variance revoked for unauthorized audience scanning

A laser light show company had their FDA variance revoked for “a very significant public safety hazard”. This is the first time LaserPointerSafety.com is aware of such a revocation due to unsafe laser light shows, since the variance process began in the late 1970s.

On July 24 2014, the Food and Drug Administration sent a letter to David Fleenor of Epic FX, Inc. of Phoenix, Arizona. It stated that videos posted on the epicfx.com website “documents audience scanning with Class IIIb and/or Class IV lasers. Although much of the audience scanning was done with fanned beams, your projector is not designed nor reported for safe audience scanning. Your variance prohibits audience scanning. Any laser beams projected into the audience directly or indirectly is considered audience scanning. This is in violation of Condition 5 of your variance.” [The page has since been removed, and returns a 404 error.]
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