Share Email Print

Optical Engineering

Polarization-insensitive dichroic filter for automatic optical inspection of printed circuit boards
Author(s): YaPing Li; Cheng-Chung Lee
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A polarization-insensitive dichroic filter was designed and fabricated at an angle of 45 deg with a slope of 13.0 and an average transmittance of 96.41% for a wavelength range about 300 nm for use in the automatic optical inspection (AOI) of a printed circuit board. The filter supports the inspection of PCBs with a high signal-to-noise ratio. The AOI had a resolution of 25.39 line pairs/mm in the tangential and sagittal directions.

Paper Details

Date Published: 1 January 2007
PDF: 6 pages
Opt. Eng. 46(1) 013801 doi: 10.1117/1.2424918
Published in: Optical Engineering Volume 46, Issue 1
Show Author Affiliations
YaPing Li, Industrial Technology Research Institute (Taiwan)
Cheng-Chung Lee, National Central Univ. (Taiwan)

© SPIE. Terms of Use
Back to Top