ASP-SP503U-1550 Phosphor Coated NIR Cameras

US $ 5,995.00 US $ 5,995.00 5995.0 USD

US $ 5,995.00

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    • 1440-1605 nm Wavelengths
    • NIR Telecom mode field analysis
    • NIR Laser beam analysis
    • Software included
    • Discontinued - Replace by: ASP-BGS-USB-SP907-1550-OSI

    Low Cost NIR Camera Technology

    ASP 503U-1550 series, phosphor coated CCD cameras, provide a new low cost alternative for measuring and viewing the output of NIR telecom devices and NIR lasers. The thin phosphor film coating is an anti-Stokes material that up-converts NIR radiation in the 1440nm to 1605nm range to visible light measurable by the CCD.

     

    Phosphor Coating Technology

    The up-conversion from NIR to visible light in the 1550 series cameras is nonlinear. The anti-Stokes phosphor coating produces visible photons at a rate roughly the square of the input signal. This is shown dramatically in Figure 1, where the camera total output increases dramatically faster than a linear output shown in the bottom line.

     

    Wavelength Response

    The anti-Stokes up-conversion efficiency is very wavelength dependent. Figure 3 shows the typical spectral response curve of a new, high response coating. As seen, we have calibrated the response from 1527nm to 1605nm. We have extrapolated the shorter wavelength region by comparing our measured response to data published over the entire range. The significance of this non-linearity is that from the CCD camera saturation in the center of a beam, the up-converted visible signal drops as the square of the input signal. Thus the lower signal wings of a beam are suppressed, resulting in the appearance and measurement of a beam width much smaller than actual.

    Model SP503U-1550
    Application Nir Wavelenghts, 1/2" format, low resolution
    Spectral Response 1440 - 1605nm
    Maximum beam size 6.3mm W x 4.7mm H
    Pixel Spacing 9.9µm x 9.9µm
    Number of effective pixels 640 x 480
    Minimum system dynamic range ~30dB
    Linearity with Power ±5%
    Spatial Uniformity ±5%
    Accuracy of beam width ±5% for beams larger than 0.6mm
    Frame rates in 12 bits mode 30 fps at full resolution 60 fps at 320 x 240
    Shutter duration 30µs to multiple frame times
    Gain control 43:1 manual
    Trigger Supports both Trigger In and Strobe Out
    Photodiode trigger Consult factory
    Saturation intensity 7mW/cm2 at 1550 nm
    Lowest measurable signal ~50µW/cm2
    Damage treshold 50W/cm2/0.1J/cm2 with all filters installed for
    Dimensions and CCD recess 89mm x 89mm x 28mm CCD recess: 4.5mm below surface
    Operation mode Interline transfer progressive scan CCD
    Software supported BeamGage
    PC interface USB 2.0
     

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