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September 3, 2011
News - Enginursday: Lunchbox Las…
about 5 years ago
Very nice "lumia" effects, folks.
Any kind of ripply glass can work. I have a bathroom cabinet shelf, though it's tempered and difficult to cut pieces, it works well, However, if yours is not doing much, you can run two thicknesses on different motors for improved effects. Vary the distance between them also. If one glass doesn't spread the beam much, having the second glass further from the first will widen the entire pattern. Just having a crystal vase on a rotating platform, in front of a screen, can yield good effects as well. AND, DON'T forget to point your laser into your nearest diamond ring !
Also great is the motors and mirrors "Laser Spiro Graph".. The mirrors are mounted "almost perpendicular" on the motor shafts (not like a tennis racket, but like a wheel): THe trick is getting the mirrors as close together as possible. It you use fans, instead of bare motors with shafts, this is difficult. The more mirrors and motors you can bounce the laser off of, the better.
I started doing Laser light shows in the mid 80's using the Radio Shack Color Computer and two Galvos salvaged from a thermal strip chart medical monitor. All the software was my own, though I was coached by one of the ILDA members. I eventually developed some sophisticated SW for drawing images on the RS graphics tablet and animating them and choreographing them to music. While I concentrated on the graphics of the "dot-to-dot" drawing type, I also used a model airplane (PWM) servo to move a couple of different lumia effect glasses into the beam.
FYI: I have complete information on the math and computations for this on my site,. Images are drawn, saved in a library and displayed with commands in RAM that determine the size, location and rotations of each image.
However, my SW is NOT portable to other platforms. The higher level routines for drawing images and doing the choreography are in RS Basic and the actual "Display Processor" that runs a show is in 6809 .MicroProcessor Assembler.
I have also seen some pretty good things done using the sound card output D to A's of a PC on YouTube. Can't seem to find any good ones just now
My INFO: http://k9dci.home.comcast.net/site/?/page/Laser_Graphics/
P.S. Don't know why one URL is bold???
about 6 years ago
Technosource USA has interesting "Glow Crazy" kits. I got one at Toys-R-Us.
The Distance Doodler (UPC 8-01561 01054-1) has two 11.5" x 15.5" pieces of what looks like this type of paper. It unfortunately stays somewhat curled from in the box. The best part is a handheld 'pen' which contains a Blue/UV LED as well as a Blue/UV laser. The LED and Laser both have some visible blue light, but also excite fluorescent materials well. The difference in reflected brightness between various "white" papers and plastics it interesting since some have fluorescent whitener that is clearly excited.
The Laser has a spot about an inch diameter at 25 feet (3.3 mrad, or 1.9 deg divergence). This is about 2-3 times that of a good HeNe, and ok for drawing at 5-10 feet.
The only info included about the light is that it is a Class I laser (LED). I couldn't find any CDRH Accession number.
Not trying to divert sales, but FYI:
Amazon shows two versions (Jan-4 2014). The one I have is $15.15 on Amazon ASIN: B00AAJ6CO4. I don't know the difference between this and the other one $14.50.
One Amazon review says sheets are also available from stuffedanimals dot com and search for "glow crazy bonus pack". Looks like five smaller sheets for $14.95.
No public wish lists :(