I’m interested in finding a cheap source of polygonal rotary mirrors, like one finds in laser printers. I don’t have a laser printer to salvage, however. Anyone find a commercial source, or maybe knows of a salvage company to contact?
Here’s one . . .
Mm, sorry, BroHogan. A scanning mirror is kind of like one slice of a disco ball: a central axis through which an axle fits, and some number of mirror planes arranged in a circle around it. If a laser is aimed at such a thing while it’s spinning, the laser beam is deflected into a long line or plane outward from the axle.
No problem - I thought you wanted to make one. I see a lot of the motorized mirrors in the barcode scanners we deal with - “slot scanners” - the big one’s that go into the grocery store lane. You could check out your local people who service these things and see if they got any old ones. I was the “first kid on my block” with a gonzo laser that I pulled out of one of those in the '80’s. ;D
I was once on a project that required a HV source so we grabbed a couple laser printers from a local electronics recycler. I’d recommend that instead of ebay since I noticed the laser assemblies come in 3,5,6 sided types and some also have concave faces meant to focus the beamsweep at a fixed distance. they seem easy to interface with though - usually it’s a 3 phase spindle motor with hall sensor feedback and you’re set.
Anyhow, electronics disposal places are usually happy to help.
I work in the AutoID industry. I specialize in machine vision now, but I worked with laser scanners before my current position.
I can sent you something gratis. I’ve got a box of them under my desk, various sizes with encoder wheels on them. Looking for anything specific?
Size, # of mirrors, speed?
I’m out of town this week, should be able to send something next week sometime.
sethc, that’s very generous. I haven’t even really thought about what kind of motor to be attached. Maybe you have some motors still attached in that junk box? I don’t think I need any encoding. I’m mostly just interested in spinning it in front of a laser to produce a clean laser plane, say, visible within a darkened room. (Experimenting with simple photometric scanning.) Something small and easy to drive would be ideal.
All of the mirrors I have are already connected to the stepper motors used to drive them in the laser scanners. I have quite a selection. I’m trapped in Quebec right now on a job, I’ll take some pictures and post some dimensions either on Friday or early next week.
Alright - I’ve got some pics for you.
This is an example of the three sizes I have:
Fancy marketing shot:
sethc, private message sent; see link at the top of your page.
Those are pretty sweet looking. The board must come from a retail scanner or a laserprinter, I can’t tell which. These are surplus or scrap salvage from a project? That big one must weigh a kilogram! Only the middle one has visible zebra encoding marks, wonder why.
These are from 3 different types of large fixed mount barcode scanners used in unattended scanning systems. Think: warehouses, courier services and other large cartons on conveyors.
id go in a dumpster or a ham radio show lol.
Is those units available commercialy ?! how do you obtain them ?