Machine Vision Knowledge Base: Lens Selection and Application Guides
Knowledge
Motorized Zoom Lens Numerical Aperture Across the Zoom Range | POMEAS
Why numerical aperture is not constant on a motorized zoom lens, how it changes resolution and depth of field across the zoom, and why recipes must be set per zoom position.
Industrial Camera Lens Selection: Focal Length, Mount and Image Circle | POMEAS
Choose an industrial camera lens by image circle, mount and focal length. Measured POMEAS FA focal length, field of view and working distance ranges, and the accuracy that follows.
Digital vs Optical Microscope: What Actually Differs | POMEAS
The difference between digital and optical microscopes is not magnification. It is where the image is formed, who can see it, and whether the result can be recorded and re-measured.
Microscope Magnification Explained: Objective, Tube Lens and Adapter Factors | POMEAS
How microscope magnification is built from the objective, the tube lens and the adapter, why screen magnification differs from optical magnification, and how to state a requirement.
Machine Vision Lighting Selection Basics: Wavelength, Geometry and Diffusion | POMEAS
How to choose machine vision lighting: wavelength against material response, geometry against surface shape, diffusion against defect contrast. Measured POMEAS source bands for each decision.
Flash Measurement System: What the Configuration Determines | POMEAS
A flash measurement system captures the whole field in one exposure, so field, resolution and illumination are fixed together before the part arrives.
Choosing a Telecentric Lens: The Four Numbers That Decide It | POMEAS
Magnification, depth of field, working distance and distortion decide almost every telecentric selection. The order you check them in matters.
Microscope Sensor Size: Field, Sampling and Compatibility | POMEAS
Sensor size sets the field at a given magnification and the sampling density. Both matter, and the image circle decides which formats are usable.
Microscope Distortion: Why It Matters for Dimension Measurement | POMEAS
Distortion moves image points away from their ideal positions. For observation it is cosmetic; for dimension measurement it is an error that must be mapped.
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