Laser Projector (Red, Green, Purple) "Laser 3D Party Light" from Spencer's

**DogP** · 08-31-2012, 09:34

Ah... I just did a search for some manuals, and came across a couple:

Similar to mine (except it has LCD and buttons, which I'll probably try hooking up one of these days):
http://www.thebestideasforall.com/ma.../CVGF-LT49.pdf

More advanced one, but similar:
http://x-laser.us/wp-content/uploads...anualPROOF.pdf

From this, it appears that the "speed" parameter is actually in KPPS. So if this is true, the test file I was using must have been ~1900 points. And the pictures were taken running the test pattern at 15KPPS.

DogP

**james** · 08-31-2012, 09:37

Originally Posted by mixedgas

Laserboy (A mouseless DOS like lasertoy that does neat stuff)

That's a very stupid thing to write, Steve.

BTW ILDA format 0 is 3D art. It's actually pretty rare. Format 1 is 2D and it is by far the most common kind of ILDA frames you will ever find. Format 2 palettes are almost non existent (unless they came from LaserBoy) and formats 5 & 4 are not universally well supported.

LaserBoy does absolutely everything that you have offered in the form of other wares that don't belong to you.

DogP, LB comes with a nice frame set, all formats 0 & 1. You might experiment with that. Do some optimizations and save some frames onto your SD card. See how those look.

James.

**DogP** · 08-31-2012, 10:04

Originally Posted by james

DogP, LB comes with a nice frame set, all formats 0 & 1. You might experiment with that. Do some optimizations and save some frames onto your SD card. See how those look.

Yep, will do. I hope to spend quite a bit of time this weekend playing around with this. I'd also like to document the position of the adjustment pots, and see if I can tweak it a little better.

DogP

**james** · 08-31-2012, 10:27

One thing you should know is that the frames that come with LB are stripped down to the fewest possible vectors. They are not optimized for display! You need to go into the LB settings menu [Tab] and take a look at what is there. Then you need to optimize the art (in menu h) and make sure it gets saved with optimizations (menu x turn off auto minimize on save). Open the results again in LB to make sure it is what you think it is. Be aware that LB was written primarily for wave output at a sample rate of 48K. This sort-of translates to points per second. So using the default settings in LB will produce very safe files, but they will probably have way too many points along the lines for slower DACs. They will scan slow and flicker a lot. Everything is adjustable to suit whatever DAC you have.

James.

**mixedgas** · 08-31-2012, 11:48

If you renumber the ILDA test pattern its value goes out the window. The circle in square part of the pattern has a carefully defined ratio of points.
I'll have some frames to you in the morning, I needed to know what format your card can read.

Steve

**james** · 08-31-2012, 12:16

If you open the files that came on your SD card in LaserBoy it can tell you the max and the average span in points (relative to short int) between the vertices. The distance between the vertices is what the galvo is expected to travel in one DAC sample. That distance translates to rotational angle, per sample, in other words rotational velocity or radians per second. That's why overall scan angle 3, 8, 15 degrees, etc... is absolutely always relevant.

If you find an image that looks pretty good at a certain scan rate with your system, then you can set the LaserBoy parameters to optimize any ILDA file to a similar velocity by setting the maximum distance between points.

Some frames might contain dwell points. These are points at corners in the drawing. There might be several samples all at the same coordinates to allow the scanner to get there and come to a complete stop before taking off in another direction. This messes up the average distance calculation because they are zero points apart from each other. In menu h, you can strip out or add dwell points, lit span or blank span independently for further analysis.

James.

**mixedgas** · 08-31-2012, 15:25

Here are some quicky frames with well defined numbers of points per our email. Saved with optimization turned off on most of them. Plus a DOG_P or two for fun.

I'll get the standard test patterns to you in the morning, I'm doing a double shift.

It is no where near equal rads/second in most graphics, vector processing in modern show software did away with that. The Galvo core does not respond that way except on very carefully constructed objects. Even more so, better galvo amplifers change their feedback based on command magnitude. If you want to get from location A to location B in the fastest manor, physics says you go 1/2 the way with full acceleration and slam on the brakes with max deceleration. Scanner speed these days is determined by torque and resonances on the better scanners, which is the limiting factor.

These frames are set up for a slow system, they are not what I'd use on 30K scanners.

One oh three is for measuring speed on your scope. One hundred point circle plus a three point marker.
10x100 should let you do the stopwatch.
You should see a visual difference in 150 vs 150 optimized.

X-Y match lets you check and see if your mirrors are at the same speed.
If the diagonal lines "bow" outward the mirrors are not moving at the same speed.

Steve

**VJ AIWAZ** · 08-31-2012, 16:41

I have one question how is this even visible at 4.9mw so that would be 2mw lets say 635nm 1 mw 532nm 2mw405nm

or is a large company like Spenser gifts selling IIIb projectors and saying screw the regs

**DogP** · 08-31-2012, 16:47

Originally Posted by mixedgas

Here are some quicky frames with well defined numbers of points per our email. Saved with optimization turned off on most of them. Plus a DOG_P or two for fun.

I popped those onto the SD card and snapped a few quick pics... attached. I wasn't sure what speed to run them at, so I did 12, which should be 12KPPS (I'll verify later), and 8 degree scan angle.