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Thermalert
®
4.0 Series
Users Manual, Rev. 2.4, Jul 2021
22
2.2 Optical Specifications
Optical Resolution
D:S
5
Focus Distances
LT-07
7:1
CF0 (plastic lens)
LT-15
15:1
SF0 (plastic lens)
LT-30
33:1
SF0, CF1, CF2
LTB-30
33:1
SF0, CF1, CF2
LT-50
50:1
SF0, CF2
LT-70
70:1
SF2, CF2
LTD-04
4:1
SF0
P7-30
33:1
SF0
G7-70
70:1
SF2
G5-30
33:1
SF0
G5-70
70:1
SF2
MT-30
33:1
SF0, CF1, CF2
MT-70
70:1
SF2, CF1, CF2
P3-20
20:1
SF4
HT-60
60:1
SF0, CF1, CF2
3M-70
70:1
SF0, CF2
2M-150
150:1
SF0, CF2
1ML-150
150:1
SF0, CF2
1MH-150
150:1
SF0, CF2
Focus Distances
SF0
1520 mm (60 in)
SF2
1250 mm (49 in)
SF4
500 mm (20 in)
CF0
50 mm (2 in)
CF1
76 mm (3 in)
CF2
200 mm (7.9 in)
Note
The focus distance is measured from the lens of the sensor.
For units with
air/water-cooled housing,
you have to subtract 70 mm (2.8 in) from the focus distance.
For units with
ThermoJacket,
you have to subtract 55 mm (2.2 in) from the focus distance.
These considerations are very important, especially for sensors with close focus optic!
For detailed optical charts, see section 15.1
5
at 90% energy, specified D:S ratio at focus point only
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