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Home > Products > VIS / SWIR HyperSpectral Imaging > Snapscan SWIR Hyperspectral Imaging Camera
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snapscan SWIR camera

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snapscan SWIR camera & lens shown with a full Lab Setup kit

Snapscan SWIR Hyperspectral Imaging Camera

Features

  • High Spectral Resolution: 100 bands (5~10nm FWHM) from 1100 – 1700nm
  • High Spatial Resolution: up to 1200 x 640 pixels
  • TE-cooled InGaAs SWIR image sensor: from 1100 – 1700nm
  • High SNR: 600:1
  • Supports Hardware Triggering
  • Host Interface: USB3.0
  • C-Mount compatible: works with industry standard lenses and microscopes
  • Includes HSI Snapscan Software for acquisition of spectral image datacubes which are ENVI compatible
  • Includes HSI Studio Software for the interactive visualization of datacubes
  • Supported by a Full-featured API with both C and Python bindings

Typical Applications:

  • Microscopy in the SWIR spectrum
  • Recycling & waste management (paper, wood, plastic, textiles, …)
  • Food quality grading, defect inspection and sorting
  • Pharmaceutical pills composition analysis
  • Skin imaging & cosmetic research
  • Forensic and counterfeit detection
  • Semiconductor thin-film inspection
  • Mineral & material characterization
  • General application research for hyperspectral imaging in the lab

Product Documents

Camera Docs

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Snapscan SWIR cameras are used by researchers to spectrally inspect stationary samples by generating HyperSpectral image datacubes with high spectral resolution AND high spatial resolution. The image sensors used in these cameras employ imec’s proprietary technology in which 5~10nm FWHM Fabry-Perot band-pass spectral filters are deposited in a pattern on the photosensitive pixels of a TE-cooled InGaAs SWIR imager. In the snapscan series, the band-pass filters are deposited on the image sensors in a striped pattern of 100 filter bands, spanning the spectral range of the underlying SWIR imager.

The cameras are c-mount compatible, which allows their use in microscopy or with conventional camera lenses. See below for an animation that describes the operation of snapscan cameras.

Snapscan SWIR cameras generate HSI datacubes in seconds by translating the image sensor with its striped pattern of 100 filter bands through the image circle that is projected by the lens or microscope optics onto the focal plane. Pixel values are read out and can now be rearranged into HSI datacubes with each λ plane along the z-axis representing the (x,y) intensity values measured for a particular wavelength.

Since the scanning process is integrated within the camera, HSI datacubes of stationary samples can be efficiently created in seconds. Researchers do not have to configure translation stages, conveyor belts or other motion control. The systems are robust enough for lab operation as well as for use in the field.

Users who wish to set up SWIR H.S.I. systems for inspecting “macro” samples can select a lens with a focal length that allows them to achieve their Field-of-View requirements. To complete the system, users may add a Lab Setup kit that includes the following: (a) a mounting setup with vibration dampening on a breadboard with a sturdy metal frame (b) 4 x 20W Halogen lighting solution, with diffusers (c) a stabilized DC power supply (d) a 200mm x 200mm calibration tile with 95% reflectance (d) a Color checkerboard calibration card

Included with Snapscan SWIR cameras is HSI Snapscan software for the acquisition of spectral image datacubes which are ENVI compatible. HSI Snapscan is a powerful, user-friendly software that helps researchers discover spectrally significant information in the reflected light from their samples that is inaccessible via conventional imaging systems. Users may also interact with datacubes from HSI Studio, which is included with the camera. HSI Studio is a user-friendly tool for the interactive visualization of ENVI compatible datacubes.

Snapscan SWIR cameras are shipped as complete systems with a sturdy Pelicase in which the snapscan camera, all necessary cables and software are included.

Host Interface: USB3.0

Wavelength Range:

  • SWIR [100 bands in the 1100 – 1700nm range]
  • For VNIR [150 bands in the 470 – 900nm range] imaging, click here

Spatial resolution up to 1200 x 640 px (0.8MP RAW per band)
Spectral resolution 100 bands (SWIR)
Spectral range 1100-1700 nm (SWIR)
FWHM ~ 5 – 10 nm (collimated)
Acquisition speed 2 to 10 seconds, depending on acquisition parameters, lighting and object
SNR up to 600:1
Software HSI Snapscan software for data acquisition, data pre-processing, hypercube visualization and classification & API for data acquisition and pre-processing in custom software  
SW scanning modes Digital TDI (x4 stages)
Digital binning  (lxl up to 20x20)
Spectral ROI - Region of Interest
Spatial ROI - Region of Interest
Dynamic range 13 bit
Optics C-mount
Smile & keystone Software-corrected
Interface USB3.0 + GPIO for triggering (TTL)
Cooling Passive & active cooling (fan based + TEC)
Operating Temperature 15°C to 45°C (operation), 5°C to 50°C (transport)
Mechanical Integrated mechanical shutter for automatic dark-counts, Tripod mount (¼’’20) + side mounting M5 holes
Dimensions (LxWxH) Weight 9 x 9 x 13 cm | 3.54" x 3.54" x 5.11"
Weight 1072g (without optics)
Hyperspectral software compatibility Output in standard ENVI hyperspectral data format

Once an ENVI-commpatible hyperspectral datacube is acquired, users can interact with the data, first by marking one or more selection areas for analysis and then classifying the image.

Snapscan software provides the following two options for classification:
▪ imec’s built-in Spectral Angle Mapper (SAM) classifier, which is included with the bundled software.
▪ Integration with 3rd party industry leading HSI analysis software perClass Mira

The following video shows how data acquired from a Snapscan SWIR camera can be used with perClass Mira software to classify different types of textiles. A 14-day trial license of perClass Mira software is included with the purchase of a camera. Users may then purchase a license and register their perClass Mira software.

Using the method described in our Knowledge Base Article titled “How Diffraction Limits the Optical Resolution of a Microscope” one can estimate the performance of this camera when used in a microscope with commercially available microscope objectives. In the table below, it is assumed that the microscope is comprised of the objective and a tube lens with the correct focal length for the objective such that the nominal optical magnification of the microscope is the value that is specified for the objective.

    SNAPSCAN SWIR Camera Parameters
    Optical Format #Megapixels #H pixels #V pixels Pixel size (μm) H size (mm) V size (mm) Diagonal (mm)
    > 1.2" 0.77MP 1200 640 15 18 9.6 20.4
    Objectives (for reference only)
    Objective: Mag/NA 1X\0.03NA 2X\0.1NA 4X\0.13NA 10X\0.26NA 20X\0.5NA 40X\0.75NA 60X\0.85NA 100X\1.4NA
    Min. feature size (um) 11.18 3.36 2.58 1.29 0.67 0.45 0.39 0.24
    Max pix size (um) 5.59 3.36 5.16 6.45 6.70 9.00 11.70 12.00
    FN (mm) 22 22 22 22 22 22 22 22
    WD (mm) 8 56.3 17.2 16 2.1 16 0.66 0.31-0.4
    NA 0.03 0.1 0.13 0.26 0.5 0.75 0.85 1.4
    Magnification 1 2 4 10 20 40 60 100
    Estimated Performance of Camera and Objective Combinations
    (*) Limiting Resolution (µm) 30 15 7.5 3 1.5 0.75 0.5 0.3
    Vignetting? No No No No No No No No
    FOV (H x V) mm 18 x 9.6 9 x 4.8 4.5 x 2.4 1.8 x 0.96 0.9 x 0.48 0.45 x 0.24 0.3 x 0.16 0.18 x 0.1
    FOV (diagonal) mm 20.4 10.2 5.1 2.04 1.02 0.51 0.34 0.2
    Please contact our imaging experts for assistance in selecting a camera & objective combination that fulfils your FOV & resolution requirements at application-specific wavelengths.
    1) The minimum feature size is estimated using the Rayleigh Criteria at λ = 550nm; it can be re-calculated for other wavelengths. R = 1.22*λ/(2NA)
    2) The maximum pixel size is estimated by applying the Nyquist criteria to the minimum feature size as it appears on the imager plane. Maximum pixel size = R*magnification/2
    3) Camera and Objective combinations which meet the Nyquist criteria and are therefore diffraction limited are indicated by showing the Limiting Resolution in green font. (*)
    4) Values for Working Distance (WD) and Field Number (FN) are shown for reference only. Actual values may vary.
    5) Vignetting, a darkening of the image at the corners, may be observed if the Imager Diagonal is larger than the Field Number of the Objective.

Please contact Scientific Imaging to select a suitable lens based on your Field-of-View requirements.

Optical format > 1.2" #H pixels #V pixels Pixel size (μm) H size (mm) V size (mm) Diagonal (mm)
snapscan SWIR 0.77MP 1200 640 15 18 9.6 20.4
In applications that require the best achievable optical resolution, it is desirable to use a lens with an optical resolution ≥ 33 lp/mm for an image sensor with a pixel size of 15μm. This will ensure that the optical resolution of the camera & lens combination is Nyquist-limited by the pixel-size of the camera, and not by the quality of the lens.

This camera has an optical format of >1.2″, corresponding to an imager diagonal of 20.4mm.

The lenses shown in the following table have a high optical resolution which exceeds the Nyquist limit imposed by the pixel size of this camera. Please check out our Knowledge Base Article for more details on why this is an important consideration for system designers.

Add to MyList Lens P/N Focal Length (mm) WD (mm) Optical Magnification Diag FOV (mm) H FOV (mm) V FOV (mm) (**) Min resolvable feature size (mm) 1mm feature =
+ My Quote
C1015.001 16 2000 0.008 2550 2250 1200 3.75 1 pixel
+ My Quote
SWIR-25 24 2000 0.013 1632 1440 768 2.31 1 pixel
+ My Quote
SWIR-35 35 2000 0.018 1166 1029 549 1.67 1 pixel
+ My Quote
SWIRON 2.8/50 50 2000 0.025 816 720 384 1.20 2 pixels

Notes:
The working distance (WD) is defined as the distance from the object plane to the front of the lens.
The above are theoretical estimates provided for reference, and are not a guarantee of performance. Actual FOVs and optical resolution are best determined by experiment.
The FOVs and smallest resolvable feature sizes are estimated with the object plane placed at the WD that is chosen for the purposes of example in this table. A similar calculation may be performed for the user-specified WDs. Please contact us for assistance: our specialists can help you identify a lens that meets your FOV requirements at a Working Distance that is convenient for your workflow.
Increasing the WD will result in larger FOVs, and lower optical resolution (an increase in the smallest resolvable feature size).
(**) Since the Nyquist limit imposed by the pixel size of the camera is comfortably exceeded by the lenses shown above, the optical resolution of the system is the estimated to be the distance on the sample plane that corresponds to two pixels in the image plane.

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