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C11440-42U30/C11440-42U31 Instruction manual_Ver.1.2
4. OVERVIEW
C11440-42U30/C11440-42U31 is equipped with the new scientific image sensor, an advanced
CMOS device that realizes the multiple benefits of high resolution, high readout speed, and low
noise all at once.
The camera provides 4.0 megapixels resolution at 30 fps (frames/s) (and up to 25 000 fps by
sub-array readout) while achieving 0.9 electrons (median) 1.5 electrons (r.m.s) readout noise
performance. Moreover, the camera delivers high sensitivity through its on-chip micro lens, 33
000:1 high dynamic range that makes the camera suitable for almost any scientific application
from bright field imaging to low-light fluorescence imaging across a wide spectral range. Various
external trigger functions and timing output functions ensure proper timing control with peripheral
equipment to cover a wide range of applications.
The camera is the new scientific digital camera for life science microscopy, semiconductor
inspection, x-ray scintillator readout or industrial imaging.
5. FEATURES
(1) Readout noise
In the camera, the pixel amplifier is optimized: it has high gain from optimizing the
semiconductor process, and the difference among pixel amplifiers are greatly
minimized. In addition, there is on-chip CDS (correlated double sampling) circuit, which
plays an important role in achieving low noise. Moreover, the sensor features a split
readout scheme in which the top and bottom halves of the sensor are readout
independently, and the data of each horizontal line is read by 2 lines of column
amplifier and A/D in the top and the bottom in parallel and simultaneously. As a result, it
achieves very fast readout speed while keeping very good low-noise performance.
The camera has lower readout noise (0.9 electrons (median), 1.5 electrons (r.m.s))
than the conventional cooled CCD camera. Moreover, high-speed readout (30 fps with
2048 pixels × 2048 pixels) with very low readout noise, which was impossible, can now
be achieved.
(2) Cooling structure
In the camera, the CMOS image sensor is cooled down by a peltier element to
suppress the dark current. The camera has a special chamber structure to avoid the
condensation.
(3) Pixel number and pixel size
The CMOS image sensor has 6.5 µm x 6.5 µm pixel sizes that is equivalent to
conventional CCD image sensor (2/3 inch, 1.3 megapixels). Also, the camera can
observe a wider field of view because the pixel number is about 3 times that of the
conventional CCD image sensor (2/3 inch, 1.3 megapixels)
(4) Readout method
The camera has a variety of readout modes. In addition to full resolution readout mode,
sub-array readout and binning readout are supported.
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