From: pashdown@javelin.sim.es.com (Pete Ashdown)
Subject: Laser galvos
Organization: Evans & Sutherland Computer Corporation
Date: Mon, 14 Sep 1992 20:53:52 GMT

rej@sal.wisc.edu (Randy Jones) writes:

>In article <18ld76INNsqi@agate.berkeley.edu> lakata@physics.Berkeley.EDU (Mark Lakata) writes:
>>what is really impressive are the "pro" laser systems that can scan a picture
>>of discrete dots.  Anybody know how much a real laser system costs?

>I've seen one used, a Lumaria I think, for $25,000. This is just the 
>laser control stuff (mirrors, galvos, etc.) Ion lasers seem to run
>around $5-$10K for, like, five watts of output. I'll stick with 
>thee Dreammachine for now.

I built a funky show for about $150, including the cost of the laser.  Here's
the details on where to get cheap galvo's and other dapper items for light
effects.  I posted this same message on alt.rave many moons ago, but it
appears it has grown quite dated:


Found a source for cheap laser accessories today.  A friend gave me this
catalog.  Normally, galvo's run about $1000, so take everything with a grain
of salt.  For $99 though, I think it's a good risk.  The spirograph thingey
sounds groovey too.

I didn't type up the shipping chart.  It would probably be wise to call and
get a copy of the catalog before sending any cash off in the mail.  Sorry for
the typos.  There were plenty in the catalog as well.

-------------------------------------------------------------------------------

GERMAN TECHNOLOGY PRODUCES LOW COST LASER GALVO!

The Silicon Valley Servo model #900/21 Laser Deflection system use a German
made, precision, iron-less cup actuator with optical feed back to achieve a 10
degree response at 150 Hz.  The wide range unit has a maximum deflection of 56
degrees and maximum frequence above 500 Hz (small signal response can reach
900 Hz).  See the chart to determine the response at the frequency you are
interested in.  In most actuators the coil is wound on an iron core and
surrounded by the field magnets.  To increase the acceleration and torque of
the system the Faulhaber-Schonaich actuator has a precision, cross wound, 5
section cub that surronds a radially polarized cylindrical rare earth magnet.
This "inside out" approach yields a lower rotor mass, lower rotor inductance,
zero cogging, and a tighter coupling of the rotors magnetic field to the field
magnets.  The moving mass is further reduced by using glass, first surface,
gold over silver mirrors that are only .0625 inch thick.  A specially designed
P.I.D. Servo amp complements the improved actuator by providng a 3 part drive
signal composed of differntial, integral, and proportional components.  This
kit includes 2 Faulhaber-Schonaich actuators, 2 single sided Ckt bds with our
proprietary stuffin template.  All of the ckt bd mounted parts, 2 first
surface mirrors, a dual galvo mount with space for the servo electronics, and
complete instructions.  Requires +/-12 vdc pwr, laser, glue, and assembly.

90/021  3  lbs  Closed loop galvo		$82.50
10/2000 .5 lbs 	Galvo manual			$15.00 (Not needed if you
purchase the closed loop Galvo)

CLOSED LOOP LIGHT SHOW

Add the DAC interface and Lissajous oscillators to turn the Galvo system into
a complete Laser light show that interfaces to your computer and stereo.  It
also allows you to create your own custom patterns manually.  Includes #90/021
two closed loop Galvo system.  #90/036 Computer interface.  #90/037 Lissajous
VCO.  Assembly manual, and the galvo case.  Requires Assembly, Software, +/-12
vcd power supply, laser, and case for the VCO and Computer interface cards.
"Day Glow" colors are extra.

900/30 5 lbs	Laser Light Show		$99.00
990/30 5 lbs	Assembled & Tested		$299.00

DAY-GLOW OPTION

Includes color matched ckt bds and case your choice of Neon orange, Neon
Green, or Opaque Violet.  Assembly required.  Need custom colors?  Please ask.

90/039 0 lb	Day-Glow option			$12.00

ACRYLIC GLUE

A fast drying solvent type glue that sets in 20 minutes.  Also used as a final
polish for the "day-glow" edges.  Full instructions are provided in the Glavo
system manual.  Must be 18 or older to purchase glue.

91/001 0.1 lb	Acrylic glue			$2.99

DAC INTERFACE

Includes a single sided ckt bd with our proprietary stuffing template and all
of the ckt bd mounted parts needed to build a step and direction computer
interface.  +/-12 vdc pwr supplies, software, and case required.

90/036 0.5 lbs	Computer interface		$12.00

LISSAJOUS VCO & MIXER

A single sided ckt bd with our proprietary stuffing template and all of the
ckt bd mounted parts needed to build a dual Voltage controlled Oscillator &
mixer.  Case, +/-12 vdc pwr supplies, and assembly are required.

900/37		Lissajous VCO			$9.00

1.6 KW SEQUENCER

Controls four 115 vac 4 amp, channels from a computer's parallel port.  That's
enough power to run a chaser with over 6000 common Christmas tree bulbs!  On
5" centers that's over 1/4 mile of flashing lights!  Includes: optically
isolated interface kit with a single sided ckt bd and our proprietary stuffing
template, assembly manual.  Demo Software listing, and 4 pre-build flasher
modules.  Purchase 2 kits & connect up to 8 flashers to 1 port.  Assembly,
case, computer, and cables, required.

800/66  5 lbs	1.6KW flasher			$59.00

WOBULATING SPIROGRAPH

A simple 3 motor system that generates unusual Spirographs with your laser.
Two motors are used to rotate the mirrors.  And a third is used as a shutter.
The 3 channel electronic control accepts a 6 volt control signal.  You may use
an audio signal, a panel pot, or purchase the computer interface #90/036 and
use your computer.  Includes a single sided ckt bd, with our proprietary
stuffing template, all of the ckt bd mounted parts, assembly manual, 2
mirrors, 1 chopper disk, and 3 DC motors.  Assembly, 12 vdc pwr supply, case
and cables are required.

90/088  2 lbs	Spirograph			$29.00

SPIROGRAPH CASE

Includes color matched ckt bds.  Your choice of Neon orange, Neon green, or
Opaque violet.  Need a custom color?  Please ask.

900/39		Case with/ mounts		$12.00


Silicon Valley Surplus
1273 Industrial Prkwy W. Bldg 460
Haywood, CA 94544-7025

Mail order phone: 1-510-582-6602
-- 
	"Oh, save me from these pale green pants with nobody inside!"

DISCLAIMER: My writings have NOTHING to do with my employer.  Keep it that way.
Pete Ashdown    pashdown@slack.sim.es.com    ...uunet!slack.sim.es.com!pashdown