Specifications
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Alvium G1 User Guide V1.1.1
Notes on specifications
This section defines the conditions for specifications stated in this chapter.
Sensor
Absolute QE plots
Measurements for color cameras were done with IR cut filter. Measurements for
monochrome and S-Mount cameras were done without optical filters. With
protection glass or filters, QE decreases by approximately 10 percent.
The uncertainty in measurement of the QE values is
10 percent. This is mainly
due to uncertainties in the measuring apparatus itself (such as Ulbricht sphere and
optometer).
Manufacturing tolerance of the sensor increases overall uncertainty.
ON Semiconductor sensors
The curve in the absolute QE plots shown in this chapter is taken from the sensor
manufacturer data sheet. The information was correct at the time of publishing.
Sony sensors
Sony provides relative response curves in their sensor data sheets. To create the
absolute QE plots shown in this chapter, the relative response was converted to a
normalized QE response and then adjusted as per three measured QE values
(at 448 nm, 529 nm, 632 nm) for color sensors and one measured QE value
(at 529 nm) for monochrome sensors.
Wavelength
The wavelength range in the absolute QE plots reflects the information available in
the sensor manufacturer data sheet at the time of publishing. Many color sensors
are documented by the sensor manufacturer only for wavelengths from 400 nm to
700 nm.
Spectral response plots
The curves in the spectral response plots shown in this chapter were calculated
from measured quantum efficiencies at 448 nm, 529 nm, and 632 nm. The shape
of the curve is taken from the sensor data sheet, but the values have been adjusted
based on these measured values. The uncertainty in measurement of the spectral
response values is
10 percent.
