hi,

this ain't exactly an overhead projection system, but it's close.  a company makes an optical inspection station that compares a known good board against another.  it alternately projects the good and the test board in the same field of view.  images that are missing or different in shape appear to flicker and are easy to spot.  if you are interested in the vendor, contact me off the net.

phil

-----Original Message-----
From: Brad L. Matthies [mailto:[log in to unmask]]
Sent: Thursday, March 30, 2000 9:21 AM
To: [log in to unmask]
Subject: [TN] Overhead Projection Inspection Equipment.


TN,

I have been working with our QA department on an overlay project using
ESD mylar-like sheets for inspecting SMT boards for missing/extra
components post-reflow.  We were wondering if anyone knows of a system
that uses technology similar to an overhead projector to display
component locations onto the board surface for inspection?  We are
interested in this in place of the overlays.  I do not recall seeing
anything like this out at APEX recently, but our QA Manager says he has
seen something like this.  Any help would be appreciated.

BLM

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