Knowledge
Multi-SKU Changeover With One Camera FAQ | POMEAS
One camera for several products means a resolution compromise and a changeover procedure: how to size the optics, what a lens swap really costs, and how to keep recipes and fixtures under control.
Calibration and Measurement Stability FAQ | POMEAS
How contamination, temperature, vibration and LED ageing move a measurement, how often to verify calibration on a running line, and how to detect drift before bad parts are produced.
Zoom Lens Parfocality and Repeatability FAQ | POMEAS
Why the image softens or shifts after zooming, how to measure parfocality and zoom repeatability with the machine's own camera, and when a fixed-focal lens is the better answer.
Industrial Lens Selection: Calculations and Errors FAQ | POMEAS
Work backwards from tolerance to magnification, check image circle, mount and working distance, and avoid the five mistakes that show up during commissioning instead of on paper.
Object-Side Resolution vs Measurement Accuracy FAQ | POMEAS
A 1.86 micron object-side pixel does not mean 1.86 micron accuracy. What the number really is, where the errors come from, and how to build and verify an error budget.
When Is a Telecentric Lens the Wrong Choice? FAQ | POMEAS
Telecentric lenses are specified far more often than they are needed. Here is what they actually buy, what drives their size and cost, and a three-question rule for deciding.
Parts With Different Heights: Depth of Field FAQ | POMEAS
Why a stepped part looks soft on one level, why a step wall hides part of the lower surface, and how to verify depth of field, occlusion and scale before production.
Telecentric Lens for Dimensional Measurement and Inspection
How to build a telecentric-lens measurement station: turning tolerances into magnification, FOV and depth of field, choosing illumination, and preventing the failure modes that cost microns.
Telecentric Lens vs. Standard FA Lens: Distortion, Accuracy, and Cost Compared
Compare telecentric and standard FA machine vision lenses by measured distortion (0.02-0.1% vs 1.0-2.4%), magnification stability and cost, with real datasheet figures worked into microns.
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