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Motion Blur Exposure Calculator
Calculate the maximum exposure time for moving objects in machine vision systems. The calculator uses field of view, image pixels, object speed, and allowed blur pixels to estimate exposure limits.
Input Parameters
Results
Use these results as engineering selection values, then verify with actual lens, camera, PCB, or light-source data as appropriate.
Equations Used
Object-side pixel size:
Pixel Size = Field of View / Pixels Along Motion Direction
Maximum exposure time:
Exposure Time = Allowed Blur Pixels × Pixel Size / Object Speed
Motion distance:
Motion Distance = Object Speed × Exposure Time
Frequently Asked Questions (FAQ)
Q1: What does this motion blur exposure calculator do?
It estimates the maximum camera exposure time that keeps moving objects within an allowed blur limit.
Q2: Why use object-side pixel size?
Motion blur becomes visible when the object moves across one or more pixels during exposure.
Q3: What blur limit should I use?
For measurement, use a strict value such as 0.5 pixel. For presence detection, 1 to 2 pixels may be acceptable depending on the algorithm.
Q4: Does frame rate equal exposure time?
No. A camera can run at a frame rate while using a much shorter exposure time, especially with strobed lighting.
Q5: What if the exposure time is too short?
Use more illumination, larger aperture, higher sensor gain, a strobe light, or reduce object speed.
