High speed 3000 pixel SWIR line-scan detector

High performance earth observation with high line rate and low noise

The high resolution Xlin-1.7-3000 InGaAs detector is specifically designed for earth observation. The detector is based on mechanical butting of three InGaAs photodiode arrays with each 1024 pixels on a 25 μm pixel pitch, forming a nearly continuous line of 2900 pixels. The sensors come in an hermetically sealed package with an anti-refl ective coated window or in an open package (optional).

Thanks to their high sensitivity and quantum efficiency they operate at very low illumination levels.

The read-out integrated circuit includes Correlated Double Sampling (CDS) and autozero features, enabling low Dark Signal Non Uniformity (DSNU).

A selectable integration time and capacitor allow for fi ne tuning the conversion gain in fl ight. You can choose from High Sensitivity (HS) mode and High Dynamic Range (HDR) mode. Furthermore the high maximum line rate of 10 kHz enables a high resolution in the time domain.


The Xlin-1.7-3000 linear SWIR detector is used in ESA's Proba-V satellite.

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Benefits & features

  • 3 x 1024 pixels
    Mechanical butting of 3 arrays of 1024 pixels each
  • High-speed 10 kHz
    Maximum line rate of 10000 lines per second
  • Correlated Double Sampling (CDS)
    Noise reduction technique
  • High sensitivity in the SWIR range
    Low noise for high sensitivity
  • Selectable integration time and capacitor
    Various gain modes available - full control over integration time

Designed for use in

  • High resolution across track
    Satellite based Linescan SWIR detector with 3000 pixels
  • High ground resolution along track
    High frame rate linescan SWIR detector
  • Low noise performance
    Various gain capacitors selectable - high gain to high dynamic range
  • Perfectly suited for atmospheric and vegetation inspection
    SWIR Linescan detector in the 800-1700 nm range
  • Inflight adaptivity to illumination conditions
    Integration time can be adjusted based on illumination condition


High resolution

3000 pixels in one line

High dynamic range

High dynamic range mode available

Camera specifications

Array Specifications

Array Specifications Xlin-1.7-3000
Array characteristics
Array type InGaAs photodiode array
Spectral band 0.9 μm to 1.7 μm
Resolution 3 x 1024 pixels mechanically butted
Pixel pitch 25 μm
Pixel height 25 μm or 250 μm
Array length 73.2 mm
Pixel operability > 99 %
Pixel alignment X-Y direction: < 25 μm (over the full array) Z direction: < 100 μm (over the full array)
Subarray separation < 1.5 mm
Fill factor 100 %
ROA 0.27 M.Ω.cm²
Peak detectivity (at 293K) 3.8 x 1012 cm.sqrt (Hz)/W
Detector characteristics
Integration time range 1 μs - 1 s
Array cooling Uncooled
Dark Signal Non-Uniformity < 5%
Modulation Transfer Function at Nyquist (MTF) > 50 %
Package Custom made metal can with ceramic substrate and 2 x 36 pins
Window and lid Double-side coated transmission fi lter with gold plated lid to allow for seam sealing
Read-Out characteristics
Technology CTIA topology 0.35 μm CMOS
Power supply 3.3 V
CDS Correlated Double Sampling
Auto Zero Yes
# outputs 3
Pixel rate 12.5 MHz
Line time 100 μs
Operating modes Integrate Then Read (ITR) Integrate While Read (IWR)
Power consumption < 300 mW per module or < 900 mW for the full array
Gain settings Various settings from 30 fF (HS) till 2130 fF (HDR)
Gain (μV/e-) From 32 (HS) till 0.19 (HDR)
Pixel well depth Various settings from 60 Ke- (HS) till 10 Me- (HDR)
Dynamic range Various settings from 60:1 (HS) till 3200:1 (HDR)
Environmental specifications
Operational temperature range -40°C to 85°C
Radiation tolerance Qualified for 10 krad ionizing radiation with maintained performance

Broad range of accessories available

Lens & filter options



Application notes
Xlin-1.7-3000 for earth observation The Xlin-1.7-3000 detector is specifically designed for earth observation to reveal lots of detailed information on vegetation, clouds, humidity and other atmospheric conditions.
Sensors for remote sensing by Xenics The main activities of Xenics are the design and manufacture of linear arrays, FPA and cameras for the Short Wavelength range (SWIR), based on InGaAs detectors. Exactly this wavelength band is of high interest in the remote sensing of vegetation properties. The water (vapor) content of the atmosphere causes a strong absorption at 1.45 μm, but above this absorption peak, the reflectance in the [1.5 – 1.7 μm] band is very interesting to determine the liquid water content in the plants and for the identification of tree types and plant conditions. For the more Mediterranean area the SWIR band is also important to detect wild fire affected areas and even for the detection of active fires.
Space developments resulting in industrial camera platforms Xenics, involved in several space projects such as Proba-V, is responsible for the design and development of the short-wave infrared detectors. A novel high resolution InGaAs line-scan camera from Xenics conquers many applications in the near infrared.
EARTHCARE is a cornerstone mission of ESA to study the radiometric balance of the earth ecosystem Preparation of the Visible, Near Infrared and ShortWave Infrared detectors on Earthcare for the radiometric analysis of the earth energy balance
Press Releases
Xenics InGaAs SWIR detector is part of the Proba-V space mission Three Xlin-1.7-3000 linear arrays are launched into space aboard the ESA's Proba-V satellite (2013)


Modules & components brochure Xlin-1.7-3000

Versatile infrared analysis and reporting software

The Xeneth user interface is common to all the Xenics cameras. This makes it easy for customers to apply their familiarity with this comprehensive product to any new applications, covering wide ranging capabilities in various parts of the IR spectrum.

Learn it once and apply it over and over again.

Karl Niedermeyer, President, Spectro Associates, Inc.