Steve, We've gone down to 4 mil plated, you tend to lose a heck of a lot of light though, insted of viewing the hole wall in segments you get 9 views of the hole at angles, putting it on the light table helps a lot, but there are still shadows t ocontend with. Franklin D Asbell Steve Kelly wrote: > How small a hole can you view. Thanks Steve Kelly > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]]On Behalf Of Franklin D Asbell > Sent: Tuesday, September 05, 2000 1:26 PM > To: [log in to unmask] > Subject: Re: [TN] Non-destructive Thru-hole Inspection > > Dave, > > A device we use that is quick and easy is a PCB through hole eyepiece (kind > of ironic, yes...~grin~) Sometimes called a prism eyepiece. Any supplier of > optical devices for > electronics should be able to direct you to a source. This device uses a > prism lens that splits the through hole into 9 images each a an oblique > angle for viewing the holl > wall. It's a real quick way to confirm hole wall quality. > > Franklin D Asbell > Network Circuits, Inc. > Irving, Texas 75061 > > Dave Kell wrote: > > > We are looking for a way to look inside plated through holes to check the > electroless plated deposit for voids prior to electrolytic. Possibly a fiber > optic video scope? > > > > ############################################################## > > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d > > ############################################################## > > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in > > the body: > > To subscribe: SUBSCRIBE TECHNET <your full name> > > To unsubscribe: SIGNOFF TECHNET > > ############################################################## > > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > > information. > > If you need assistance - contact Keach Sasamori at [log in to unmask] or > > 847-509-9700 ext.5315 > > ############################################################## > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following > text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################