Does the glycerin ruin the parts? These are production pieces so I am trying to avoid anything that will damage the parts. The laser seems to be going right thru the glass expect for a few areas on the lens that is ground down.
When I used to scan car windscreens we used to measure the thickness of a Matt Sticky tape and then stick it on the screen in bands,
By offsetting the CAD by the thickness of the tape it enabled us to scan quite easily.
Not sure how tight the tolerances are your working to but that method worked fine for Automotive glass tolerances.
try misting it with developer from a spray can, have done this to scan chrome plated/mirror finishes with good success.
if you apply a very light mist it will add less than .001" thickness to the surface and reduce noise to nothing.
It is also pretty fast to clean up, wipes off completely with a dry rag.
We use it regularly on chrome plating, the part has a concave featire with a focal point, just wants to give noise but the developer is slick, glad it helped... that said stick to the name brand, xheaper stuff is available but will be clumpy
The new RS6 scanner (compatible with the 8 series arms) is now capable of scanning glass without the usage of developer spray. It has a ''high gain'' parameter in RDS, and when that parameter is activated, it can scan glass, mirror finished machined parts, shiny black etc. Below you've got an example of a car window scan with the RS6 (5 minute scan)
UK Applications Engineer
PC-DMIS Portable and Pointcloud Scanning
no offense but a salesman told my manager the same thing about our RS2 ability to scan chrome plating polished to a mirrored concave surface. I had to nearly refuse to do it and quit my job to get developer in use. If your part has a focal point I still gotta see it to believe it
