Providing more than twice the high-dymanic range of
normal cameras, operating in the visible spectrum and designed around
2CCD monochrome, progressive scan, prism-mounted sensors,
the AD-081GE leverages the
benefits of GigE Vision/GeniCam technology by adding
innovative capabilities and improvements previously unavailable in their
the CameraLink version of this camera.
Special benefits of 2CCD design
The prism-based design enables a single optical
path to be split across both CCDs simultaneously while maintaining alignment
to within one-quarter pixel.
By independently adjusting the shutter/gain settings on each of the two
CCDs and fusing the two synchronized video streams (using the new S/N
mode), the AD-081GE is able to capture details in scenes with
a wide variation of light intensities, providing more
than double the dynamic range of standard CCD cameras (up to
~120 dB) but in a linear fashion that avoids
the noise, shutter, and compression issues found in typical CMOS-based
logarithmic or LinLog™ high dynamic range cameras.
Alternatively, the timing of each CCD’s readout can be offset by
one-half frame and interleaved together to produce 60 fps output without
the image degradation that would result from over-clocking the
Precise CCD alignment for HDR motion capture
Selection of capture modes
The AD-081GE is equipped with continuous mode, pre-select trigger mode,
pulse width trigger mode and a special 3-shot PIV (Particle Image Velocimetry
see below) mode.
Output is via a standard GigE Vision interface, which
can be used in a one-cable or two-cable configuration, depending on the
GigE Vision, GeniCam
and the JAI SDK software combination
Combining the above three facilities allows for a built-in image fusion
routines that can automatically produce high-dynamic range output without
any post-processing required. The camera uses built-in algorithms to fuse
the two images and outputs the combined result.
Specialised HDR functions
Understanding that users may have unique requirements, JAI has added a
variety of specialized HDR functions allowing users to offload HDR processing
to a host computer and build customise applications to fit their own needs.
Many CMOS HDR cameras use logarithmic methods to compress 16- or 20-bit
scene information into 8- or 10-bit pixel data on the sensor. However,
this allows the high-dynamic range scenes to be displayed at the expense
of losing the true values of the 20-bit pixel scale. By using two CDs,
the camera is able to capture a linear representation of true 20-bit pixel
values for machine-vision processing while converting those values in
a way that can be displayed on standard monitors.
The camera's prism-based design guarantees alignment of the two CCDs
to within a quarter pixel accuracy, enabling a full 30 fps HDR performance
with no ghosting or parallax issues on moving objects.
Better analysis of ultra-fast events
Unique "3-frame" *Particle
Image Velocimetry (PIV) trigger modes leverage the camera's two-channel
design to capture three closely-spaced images on a single trigger instead
of the two captured by conventional PIV trigger modes. This allows 50% more
data to provide better analysis of ultra-fast events.
Read more: Adept
Machine Vision Techology Newsletter - July, 2010.
Typical applications for the
Typical HDR applications for the AD-081GE include
inspection tasks where incident light or bright reflections are present,
such as LED inspection, welding, and various types of lighting or glass
The camera is also ideal for a wide range of automotive applications,
microscopy, or high-end surveillance uses. The parameters of each CCD
can be adjusted by the user to provide maximum dynamic range or maximum
contrast/sensitivity within a narrower lighting range, depending on the
||Two 1/3” Monochrome IT CCD mounted on
an optical prism
||1024 (h) x 768 (v) active pixels per channel
||4.65 x 4.65µm
||Dual monochrome 8-, 10- or 12-bit GigE Vision
output. Sunchronised or separate timing.
|Max. Line / Frame Rate
||30 frames/second (HDR) image fusion; 60 frames/second
||Auto shutter from 1/30 to 1/10,000 sec.
||C-mount (use 3CCD type, Max. 4.0 mm thread)
||-5°C to +45°C
||12V - 24V DC ± 10%.
||55 (H) x 55 (W) x 98.3 (D)mm
JAI AD-081GE Datasheet