Machine Vision Knowledge Base: Lens Selection and Application Guides
Knowledge
How to Choose a Zoom Lens + APO Objective: 5-Step Checklist
Select a zoom lens + APO objective in 5 steps: set NA from feature size, size FOV, match the TV tube, check low-mag vignetting, request verified data.
Motorized Zoom + APO for Semiconductor Wafer Inspection
Motorized zoom plus APO objectives for semiconductor and wafer inspection: a 12.5X body with a 10x APO gives a computed 5.8x-75x, 1 um range.
Matching Camera Sensor to Zoom Lens Image Circle: 1/3–1 Inch
Camera sensor to zoom lens image circle matching: 1x, 1.5x, 2x tube rules, why 1/3-inch sensors never flag vignetting, and the 72.5% field limit.
Zoom Lens Total Magnification & FOV Calculator
Calculate total magnification and FOV for zoom lens + APO objective setups, including the 0.55x APO adapter coupling factor.
APO vs Plan Achromatic vs Achromatic Objectives
APO vs plan achromatic vs achromatic objectives: what each correction class fixes, MPO NA 0.055-0.50 and WD 18.9-45.3 mm, plus a resolution reverse lookup.
Industrial Lens Vignetting: 3 Causes and Fixes
Three root causes of dark corners in telecentric, zoom and FA lenses, a step-by-step diagnosis flow, and which fixes are worth the money.
Zoom Lens with APO Objectives: Magnification and Vignetting
How a zoom lens works with 2X-50X APO objectives: total magnification and FOV calculations, why vignetting appears at the low-magnification end
Motorized Zoom Lenses: Complete Selection and Integration
A motorized zoom lens changes magnification under software control.
6.5X vs 12.5X Industrial Zoom Lenses
6.5X vs 12.5X industrial zoom lenses compared on published data: magnification range, field of view, working distance, depth of field, control options and integration
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