What do these machine vision calculators return?
They return pixels for a field, pixel size on the part, lens distance and magnification, exposure for a moving part, line-scan rate, an integer rate ratio, emitting size, and strobe duty.
Selection tools
Calculate the field, then open the series.
Screen the pixels, the lens distance, the exposure, the line rate, the emitting size, and the strobe duty. Send the part when you want the series.
1. Pixels for the field
Pixels = field ÷ smallest feature. Leave the height empty for a line-scan width.
2. Pixel size on the part
Pixel size = field ÷ pixels. A detection screen uses 3 pixels across the feature. A measurement screen uses 5.
3. Lens distance, field, and magnification
Focal length ≈ sensor × distance ÷ field. Telecentric working distance stays on the lens model row.
4. Exposure for a moving part
Maximum exposure = pixel size on the part ÷ speed. Enter a pixel size directly, or leave it blank and use the field and pixel count.
5. Line-scan rate
Line rate = web speed ÷ pixel size, multiplied by the number of time slots.
6. Multiply and divide
Integer multiply and divide values, from 1 to 64, that land closest to the output rate.
7. Emitting size
Half-angle is arctan(field ÷ (2 × lens distance)). A bright field or backlight edge is the field plus the spread at the light. A ring inner diameter is the field diagonal at the light, plus 15% clearance.
8. Strobe duty
Duty is on-time divided by the period. This screen uses 1% for a standard strobe and 0.1% for a high-output strobe. Order against the limit on the controller model row.
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Calculator questions
Where do I take the result?
Open the matching lighting or controller series, then send the part. Emitting size, wavelength, and working distance sit on the model row.