New near infrared/colour multispectral line scan cameras
12 Oct 2015
These quadlinear 4 channel cameras provide the benefit of simultaneous feature detection in the visible and the NIR spectrum. This enhances detection capability for a wide range of applications, including print, bank note inspection, electronics manufacturing, food and material sorting. In particular, the NIR channel allows the detection of defects that cannot be seen in the visible spectrum, making these cameras particularly powerful for both sorting and inspection.
The unique combination of NIR and visible imaging in a single unit allows machine vision developers to design compact systems using one instead of two separate cameras.
Piranha4 from Teledyne DALSA
The Piranha4 quadlinear line scan camera features a 4 line CMOS sensor with wafer-level dichroic filters to provide red, green, and blue (RGB) outputs plus a NIR channel for multispectral imaging. It is available in 2k resolution, with 14.08 micron pixel size and delivers a maximum line rate of 70 kHz.
The camera also features sub-pixel spatial correction, horizontal parallax correction, multiple AOI and ROI, and independent exposure time for each colour channel. Flat field correction can be done on each channel or as a group. In addition, by utilizing a single sensor, these cameras can make use of standard lenses with infrared correction, which leads to lower prices and a larger choice of lenses.
Sweep+ from JAI
The new Sweep+ models are prism-based industrial colour line scan cameras. These cameras capture the red, green, blue and NIR bands in four separate channels simultaneously through the same optical path.
Sweep+ cameras are available with a variety of sensor resolutions (from 512 to 4096 pixels) and sensor types (CCD and CMOS). All cameras in the range feature one-push automatic white balance, flat-field correction and colour shading compensation and binning functions for increased sensor sensitivity.