Optics - MICRO-EPSILON CTVM-1L Instruction Manual

Optical Charts
The vario optics of the CTVideo allows a smooth focusing of the optics to the desired distance. The sensors
are available in two optic versions:

Optics

SF
CF
The size of the measuring object and the optical resolution of the infrared thermometer determine the maximum
distance between sensor and measuring object.
In order to prevent measuring errors the object should fill out the field of view of the optics completely.
Consequently, the spot should at all times have at least the same size like the object or should be smaller than
that.
The following tables show the diameter of the measuring spot for some selected distances. The spot size
refers to 90 % of the radiation energy.
The distance is always measured from the front edge of the sensor.
3L: SF optics (D:S = 60:1)
spot size
measurement distance
3L: CF optics (D:S = 60:1)
spot size
measurement distance
thermoMETER CTVideo
Focus adjustable in the range
200 mm til infinity
90 mm til 250 mm
mm 3,3
mm 200
mm
1,5
mm 90
5,0 7,5 11,7
300 450 700
2,0 2,5 3,0
120 150 180
18,3 26,7 41,7
1100 1600 2500
3,5 4,2
210 250
83,3
5000
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