Aperture tests, and ordinary telecentric lens imaging contrast
Industrial tests, using different lens, imaging effect is also different, this article to introduce the aperture tests, and general industrial telecentric lens imaging difference.
Telecentric lens aperture, due to the unique characteristics of parallel light, make sure that pore size measurement will not produce shadows, contour data accurate, clear, do not need to do too much correction of image.
Ordinary lens aperture, because ordinary camera vision, focusing error and aperture walls are prone to shadow, to extract the inner hole edge, inaccurate data, the accuracy is not high.
Telecentric lens is more suitable for detecting the thickness of the aperture, high measurement applications on the edge detection requirements, sizing industry.