A1471 Type 05 Hamamatsu Orca II Accessory

The Hamamatsu Orca II Series Cooled Digital Cameras is designed to combine high resolution, low noise, and high sensitivity with readout versatility. The ORCA II has two independent clock rates. The 1.25 MHz clock rate is for high precision imaging, achieving 3 to 5 electrons read-out noise. The 10 MHz clock readout is for high frame rate imaging (up to 5.3 Hz). In addition, various pixel formats are attainable by adjusting binning or sub-array functions to achieve even faster frame rates.

The ORCA II incorporates a CCD with an effective 1280 x 1024 pixel array and progressive scan interline design to eliminate the need for a mechanical shutter. This permits high resolution and high speed measurement without the vibration often seen when using a mechanical shutter. The combination of Hamamatu's unique hermetic vacuum sealing, and peltier cooling, with air radiation, enables the CCD chip to operate at -40 to -50°C. Vacuum levels of 10^-5 Torr or better keeps the temperature consistent for extended periods of time. This suite of features drastically reduces the dark current of the CCD chip, making the camera the ideal choice for high sensitivity scientific measurements that require long exposure times.

AIA standard digital output ensures compatibility with a large selection of commercially available frame grabber boards. Control commands common to the ORCA make it easy for the various commercially available software to be adapted for the ORCA II.