Hmm seems like my idea of using a thin walled steel oil drum wouldn't work. A pitty because I buy these things for $25. A quick look on ebay shows some big pressure vessels large enough for someone to crawl into for around $1000.
What kind of vacuum pump would I need to pull it down to 1/3...
I'm trying to make a small Vacuum chamber for some hobby experiments to simulate high altitudes..
I really don't know that much about Vacuum physics so was hoping someone could comment.
My idea is to get a vacuum pump and pump out a 55 gallon steel or plastic drum to 1/3 bar.
My...
Thanks for the helpful comments.
I'm thinking about structured light but the structured light comes from of a double slit.
That way a very linear grid can be made with double slit and I can scan it across the object to fill in the spaces.
On the cheap I can make the slit for next to...
I've tested the CNC and made some pcb traces that are 1 thou in thickness so don't see a problem making slits the same width.
Time of flight measurements are not very accurate with cheap electronics. Even high end are only good to a few mm over tens to hundreds of meters.
What I was...
Actually I was going to mount it on an XY table and scan both X and Y directions so I can easily account for any tilt.
I'm trying to get it down to 1micron measurement so I can render a 3d surface.
I can engrave slits about .002 inches in thickness and separations in increments of .0001...
If you go to:
http://www.ub.es/javaoptics/applets/YoungEn.html
I would know the wavelength of light of my laser, the distance between the slits (optical microscope), distance between maxima (camera+matlab+image processing toolbox), therefore I can calculate the distance between the plates...
I'm thinking about using two slits, a webcam and a laser to calculate distances for a project.
Usually you measure the distances between maxima but this can be easily measured in a dark room using Matlab and it's image processing routines.
I can create the slits and accurately measure them...