User Manual

DANAK akkreditering 255
Dansk Fundamental Metrologi A/S
Matematiktorvet 307, DK-2800 Kgs. Lyngby
Certifikat nr. PM1203
Side 2 af 2
Dato: 2012-07-02
Method
The power calibration is performed according to DFM procedure Q2KAL402.
The working standard used is the Trap#1. The working standard was most recently calibrated
2011-11-23.
The total power was measured approximately 10 mm from the source.
The calibrations were performed at a room temperature of 22 C ± 1 C.
The reported expanded uncertainty of measurement is stated as the standard uncertainty
multiplied by a coverage factor k = 2. For a normal distribution this corresponds to a
coverage probability of approximately 95%. The standard uncertainty of measurement has
been determined in accordance with EA publication EAL-R2.
Calibration parameters
Results
Wavelength
Battery Voltage
Power
Uncertainty
nm
V
mW
mW
652
3×1,5
0,823
±0,030
Classification
The standard EN 60825-1: 2007 (Safety of laser products – Part 1: Equipment classification
and requirements) has been used to calculate the maximum permissible exposure (MPE) and
the accessible emission limit (AEL). The latter indicates the maximum accessible emission
permitted within a particular class.
The output power was measured shortly after insertion of the batteries, which were supplied
by DFM.
The output power is 0,823 mW (λ = 652 nm), the source is a well-collimated point source
where the angular subtense α ≤ 1,5 mrad. The beam diameter and divergence angle are
small and hence measurement conditions 1, 2 and 3 give the same AEL.
Beam diameter: 1,7 mm
MPE (Table A.2) = 10 W/m
2
. For a pupil opening of 7 mm this corresponds to 0,39 mW.
AEL (Table 7) = 1 mW. This value is the AEL for a Class 2 laser product. The laser under test
exceeds the AEL for a Class 1 but is less than the AEL for Class 2; therefore the laser would
be classified as Class 2.
A class 2 laser product is any laser product in the wavelength range 400 nm to 700 nm, which
during operation does not permit human access to accessible laser radiation in excess of the
accessible emission limits of Class 2 for applicable wavelengths and emission durations.