1.7µm InGaAs

Andor iDus InGaAs 491 array series provide the most compact and optimized research-grade platform for Spectroscopy applications up to either 1.7 or 2.2 μm. The Thermo-Electrically cooled, in-vacuum sensors reach cooling temperatures of -90ºC where the best signal-to-noise ratio can be achieved for the majority of the applications in this spectral region

  • 0.6 to 1.7 μm
  • Peak QE of > 85%
  • TE cooling to -90°C
  • UltraVac™
  • Single window design

Andor's iDus InGaAs detector array for Spectroscopy

Andor's iDus InGaAs 1.7 array detector series provides the most optimized platform for Spectroscopy applications up to 1.7 µm. The TE-cooled, in-vacuum InGaAs camera sensors reach cooling temperatures of -90°C where best Signal-to-Noise ratio can be achieved. Indeed dark current will improve moderately below -90°C where scene black body radiation will dominate, while Quantum Efficiency of the sensor will be greatly impacted at these lower temperatures and lead to a lower Signal-to-Noise ratio..

Key Specifications
Model Number DU490A DU491A DU492A
Sensor Options 512 pixels, 25μm pitch 1024 pixels, 25μm pitch 512 pixels, 50μm pitch
Active Pixels 512 1024 512
Pixel Size 25 x 500 µm 25 x 500 µm 50 x 500 µm
Cooler Type DU
Wavelength Range 600 nm - 1.7 µm
Minimum Exposure Time 1.4 µs
Minimum Temperatures
Air Cooled
Coolant @ 16°C , 0.75l/min
Coolant @ 10ºC, 0.75l/min

Max Spectra per Second 193 per sec. 97 per sec. 193 per sec.
System Window Type Single UV-grade fused silica window, uncoated
Digitization 16 bit
Features Benefits
0.6 to 1.7 μm Operating wavelength range
Peak QE of > 85% High detector sensitivity
TE cooling to -90°C Negligible dark current without the inconvenience of LN2
UltraVac™ Permanent vacuum integrity, critical for deep cooling and sensor performance
Single window design Delivers maximum photon throughput
25 μm pixel width option Ideal for high-resolution NIR spectroscopy
Simple USB 2.0 connection USB plug and play – no controller box. Inputs & Outputs: External Trigger, Fire and Shutter TTL readily accessible. I2C for the more adventurous user
Software selectable output amplifiers Allows user to optimize operation with choice of High Dynamic Range (HDR) or High Sensitivity (HS) modes of operation
Minimum exposure time of 1.4 μs Enables higher time-resolution and minimization of dark current contribution for applications with reasonable signal level
Graphs and Drawings
System Dark Current v Temperature

Quantum Efficiency Curve
 Typical Application
 Typical Setup
 Dimensions - Front

 Dimensions - Side

 Connector Panel

Multimedia Library
Product Photos (4)