Ocean Optics NIR - Manual (Page 28)

B: Specifications
Name Description
InGaAs Detector
Each pixel on the detector responds to the wavelength of light that strikes it.
Electronics bring the complete spectrum to the software.
NIR Detector Specifications
NIR512 NIR256-2.1 NIR256-2.5
Detector
Hamamatsu G9204 512-
element InGaAs cooled
array Hamamatsu G9206 256-
element InGaAs cooled
array Hamamatsu G9208 256-
element InGaAs cooled
array
Number of
elements
512 pixels 256 pixels 256 pixels
Detector
temperature
specifications
Cooling 30 ºC below
ambient, stable
temperature to within ±
.1 ºC
Cooling 40 ºC below ambient, stable temperature to
within ± .1 ºC
Responsivity
range
0.85 – 1.7µm 0.9 – 2.05µm 0.9 – 2.55µm
Responsivity peak 1.6µm 1.95µm 2.3µm
Pixel size 25 µm x 500 µm 50 µm x 250 µm 50 µm x 250 µm
Pixel well depth 187,000,000 electrons
Dark signal RMS 1 <12 counts <14 counts <14 counts
Defective pixels 2
None
Max Dark Current = 60pA
at 25 ºC
2%
Max Dark Current = 120pA
at -20 ºC
5%
Max Dark Current = 2000pA
at 25 ºC
Signal-to-noise
ratio
4000:1 at full signal
Above zero
integration Time
3
1000 msec N/A N/A
Notes:
1. Does not include first or last pixels.
2. Defective Pixels are specified at the specific test conditions.
3. As integration time increases, the dark value of a pixel may decrease. The “Above Zero Integration Time” figure is the maximum
integration time at which all pixels have a dark value greater than zero A/D counts. Longer integration times are possible if these pixel
values are ignored or interpolated.
22 197-00000-512-02-0707