Spot Size Ratio Calculator

Choose Your Camera Model
Camera Model
Horizontal Field-of-View		degrees
Detector Array Size (horizontal)		pixels/row
Effective pixels/spot		pixels/spot

Pixel angular resolution(IFOV)		mrad
Measurement angular resolution		mrad
Spot Size Ratio (SSR)		SSR

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Try this calculator with any infrared camera.
NOTE: Registration is required.

NOTE:
SSR = distance to object/measurement spot size
A higher number is better.

Enter Distance to Object to Determine Min. Object Size
Distance from camera to object		meters
Smallest object dimension		mm

Enter Minimum Object Size to Determine Max. Distance
Smallest object dimension		mm
Maximum distance from camera to object		meters