The VL-3701 is an illuminance detector head whose photometric responsivity and cosine field of view correspond to the DIN 5032 - Article 7 quality class A. The detector can be combined with all optometers and light meters from Gigahertz-Optik.
The VL-3701 is calibrated in terms of its absolute illuminance responsivity and relative spectral responsivity by the Gigahertz-Optik calibration laboratory for optical radiation measurands. The calibrations are documented in an individually compiled calibration certificate. The design and contents of the calibration certificate are in accordance with the ISO 17025 specifications.
VL-3701 typical V(λ) responsivity
Calibration of the illuminance responsivity in A/lx using a halogen calibration lamp with a color temperature of 2856K and 1600 lx.
Calibration of the relative spectral responsivity in the visible spectral range
Calibration of the photometric responsivity in connection with the accessories
Calibration of the cosine field of view function
|V(λ) matching error||
f1 ≤ 3 %
|Max. signal current||
|Min. signal current||
depends on optometer
Diffuser window 7mmØ
|Cosine matching error||
f2 ≤ 1.5 %
coaxial cable 2m Long, with BNC (-1), calibration data (-2) or ITT (-4) connector
(5 - 40) °C
|typical V(λ) responsivity|
Optional waterproof retrofitting of the VL-3701 detector using quartz dome and o-ring reinforcement of the base plate.
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