Getinge Volista - Page 96

8
Technical specifications
Optical properties of VSTII lightheads
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VOLISTA
IFU 01781 EN 19
Specifications VSTII 600 Tolerance Representation
Nominal illumination, Ec (AIM mode
enabled)
23
130,000lx ±10%
Shadow dilution with one offset mask
23
86% ±10
Shadow dilution with two offset
masks
23
58% ±10
Tab.34: AIM mode specifications on VSTII 600
Specifications VSTII 400 Tolerance Representation
Nominal illumination, Ec (AIM mode
enabled)
23
130,000lx ±10%
Shadow dilution with one offset mask
23
77% ±10
Shadow dilution with two offset
masks
23
50% ±10
Tab.35: AIM mode specifications on VSTII 400
NOTE
The R9 colour rendering index applies to only one end of the spectrum, above
650nm, in which the sensitivity of the eye is reduced. Therefore, above a value of
50points, there is no longer any impact on colour discrimination by the surgeon.
An increase in R9 is necessarily accompanied by an increase in radiant energy.
Irradiance in near-infrared wavelengths of the ranges relevant to fluorescence imaging
Volista fixed colour
temperature
Volista variable col-
our temperature
Volista VisioNIR
Boost
Irradiance in the
710-800 nm range
≤ 35 W/m² ≤ 12 W/m² ≤ 1.25 W/m²
Irradiance in the
800-870 nm range
≤ 2.1 W/m² ≤ 0.25 W/m² ≤ 0.03 W/m²
Tab.36: Irradiance in near-infrared wavelengths