Laser Scanner For Automatic Inspection Of Printed Wiring Boards

Philip Geise; Eugene George; Fritz Freese; Robert Brown; Victor Ruwe

doi:10.1117/12.959558

19 November 1980 Laser Scanner For Automatic Inspection Of Printed Wiring Boards

Philip Geise, Eugene George, Fritz Freese, Robert Brown, Victor Ruwe

Proceedings Volume 0255, Practical Electro-Optical Instruments and Techniques; (1980) https://doi.org/10.1117/12.959558
Event: 1980 Huntsville Technical Symposium, 1980, Huntsville, United States

Abstract

An, Instrument is described which inspects unpopulated, populated (components onserted and leads clinched), and soldered printed wiring boards for correct hole location, component presence, correct lead clinch direction and solder bridges. The instrument consists of a low power heliumneon laser, an x-y moving iron galvanometer scanner and several folding mirros. A unique shadow signature is detected by silicon photodiodes located at the optium geometry to allow rapid and reliable detection of components with correctly clinched leads. A reflective glint screen is utilized to inspect for a solder bridges. The detected signal are processed and evaluated by a minocomputer which also controls the scan inspection rate of at least 25 components or 50 components holes per second. The return of investment on this instrument for high volume production of printed wirind boards is less than one yea and only slightly longer for medium run military application.

Citation Download Citation

Philip Geise, Eugene George, Fritz Freese, Robert Brown, and Victor Ruwe "Laser Scanner For Automatic Inspection Of Printed Wiring Boards", Proc. SPIE 0255, Practical Electro-Optical Instruments and Techniques, (19 November 1980); https://doi.org/10.1117/12.959558

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available