14 July 2010
JAI has released the LQ-200CL, a prism-based four-CCD colour line scan camera providing simultaneous separate imaging of red, green, and blue, plus near-infrared light data.
The camera features a beam splitter prism with hard dichroic coatings incorporating four precisely pixel-to-pixel aligned CCD sensors. R, G, B and NIR light spectrum bands are captured simultaneously in four separate channels through the same optical path. By adding an NIR sensor, the camera makes it possible to identify an even wider set of defects on inspected objects.
Each of the four CCD sensors provides 2,048 linear pixels with a pixel size of 14 x 14μm. The camera runs at a maximum scan rate of 19,048 lines per second with a 40MHz pixel clock, delivering a high signal-to-noise ratio of 58dB.
The camera's prism-block technology enables users to avoid the complex alignment and encoding issues associated with tri-linear line scan cameras, especially those related to off-axis viewing, variations in conveyor speeds, surface undulations, or objects that roll or move as they pass through the camera's field of view.
A number of built-in pre-processing functions are available including flat-field correction, gamma/gain correction and manual/automatic white balance. With the gamma/gain correction function the user can take full advantage of the sensors' dynamic range to optimise the image. Gamma/gain correction, flat-field correction, as well as the electronic shutter can be set individually for the four channels.
With a special noise reduction circuit and a newly developed algorithm, the LQ-200CL makes it possible to improve the signal-to-noise ratio by up to 3dB (depending on the situation) without losing spatial resolution.
The LQ-200CL features three shutter operating modes, including a pulse width control mode, providing users with substantial flexibility in operating the camera. The camera outputs 4 x 8 bits or 4 x 10 bits through a Camera Link interface. A binning function can combine the values of two adjacent pixels at the output stage resulting in double sensor sensitivity.
A test pattern generator is also included that can be applied as a setup and installation aid to check the performance of the camera. This feature also provides users with help when debugging and setting up the frame grabber.
Just like JAI's other line scan cameras, the LQ-200 undergoes extensive shock (50G) and vibration (3G) testing. A ridged housing design provides maximum surface area for heat dissipation resulting in excellent temperature management and optimal image quality.
LQ-200CL is available with M52 mount (standard) or Nikon F-mount (optional).