RayTek MI Miniature Infrared Sensor - Manual (Page 14)

Technical Data
6 MI
3.2 Optical Specifications
Optical Resolution D:S
MID, MIC; MIH 22:1 (typ.), 21:1 (guaranteed)
MID, MIC; MIH 10:1
MID, MIC 2:1
At 90% energy in minimum and distance 400 mm (15.7 in.)
Figure 1: Spot Size Chart