QSI 6120wsg Cooled Monochrome CCD Camera with Internal 5-Position Color Filter Wheel
- Color or Monochrome Camera: Monochrome
- Cooled or Uncooled: Cooled
- Pixel Array & Resolution: 4250 x 2838 (12.1 MP)
- Pixel Size in Microns: 3.1
- Sensor Model: ICX834
Like all QSI 600 Series cameras, the 6120wsg offers supreme quality images with high frame rates, exceptionally wide dynamic range, superb linearity, and extremely low noise by providing up to 8 MHz dual read rates using High Speed USB 2.0 and full 16-Bit output. Custom two-stage TEC enables regulated cooling down to greater than 45ºC, or greater than 50ºC with an optional Liquid Heat Exchanger.
Each camera in QSI's 600 Series uses a high speed USB 2.0 port (USB 1.1 compatible) in order to connect with a host computer and imaging application software. For an entire 2048 x 2048 image frame, typical read and transfer time is roughly 1/2 second in High Speed mode and under 7 seconds in High Quality mode. This frame rate can be enhanced further by reading only part of the image (ROI) or with flexible on-chip binning.
The superb imaging performance of QSI 600 Series cameras is wrapped in an attractive, compact design with outstanding power efficiency and investment protecting upgrade capabilities. The refined engineering and impressive fit, finish and attention to detail will surpass your highest expectations.
QSI 6120wsg Monochrome CCD Camera Features
Sony ICX834 CCD Sensor: This QSI 6120wsg camera incorporates the 12 megapixel Sony ExView ICX834 interline transfer CCD image sensor featuring both micro lens technology and anti-blooming protection technology. The Sony ICX834 contains 3.1 µm x 3.1 µm pixels in a 4250 x 2838 active imaging array for high resolution. Image size is 13.2 mm x 8.8 mm. With a peak quantum efficiency of 77% at 560 nm and remarkably low dark current, the ICX834 offers impressive sensitivity across the visual band.
Mechanical Shutter: Includes both an electronic shutter and a mechanical shutter. When operating with an interline transfer CCD, the mechanical shutter is not used to actually make the exposure. This is still the responsibility of the electronic shutter. The mechanical shutter is employed to cover the CCD and simplify the creation of Dark and Bias frames for subsequent image processing.
WSG Body & Integrated Filter Wheel:Using a WSG camera body in order to accommodate an internal five position color filter wheel while supplying an integrated guide port, this 6120 camera from QSI features CNC machined aircraft grade aluminum alloy contruction engineered via liberal use of sophisticated CAD-CAM design tools. Anodized body parts, assembled using corrosion resistant stainless steel hardware throughout, are elegantly finished. Filter wheel accepts standard threaded 1.25" filters*.
Integrated Guide Port (IGP): The Integrated Guider Port in the QSI 6120wsg works by redirecting a portion of the light from your main telescope with a pick-off prism into a separate guide camera mounted on top of the WSG cover.
The Integrated Guider Port solves a number of the problems associated with other common guiding solutions. In one of the images to your left you will see a camera with the red arrows that represent the portion of the light redirected to the guide camera. The light enters the camera, strikes the pick-off prism positioned in front of the built-in 5-position color filter wheel and is reflected upward at 90 degree angle into the guide camera attached on top. By picking off the light for guiding from in front of the filters and mechanical shutter, you’re able to utilize all the light from your guide star for guiding. No light is lost by first passing through a red, green blue or narrowband filter, guaranteeing the highest possible signal to noise ratio (SNR) for your guide stars. You can guide even while the shutter is closed.
The large 1/2” square pick-off prism is optimally positioned close to the internal filter wheel just outside the field of view of the main sensor, supporting the use of guide cameras with large sensors, while preventing any vignetting of the main sensor even with very fast optical systems.
High Quality Read Mode: For the lowest possible noise, use High Quality (HQ) Read Mode. This mode, however, doesn't read the image from the sensor as quickly as High Speed (HS) Read Mode, which reads the sensor image at a rate of 8 million pixels per second (8 MHz) while supporting frame rates of up to 15 fps depending on the camera model, ROI, and binning.
USB 2.0 and Full 16-Bit Output: A pixel depth of a full 16-bits per pixels enables extremely smooth color and gray scale transitions as well as the lowest noise.
Selectable ROI and Binning: All QSI cameras have selectable Region of Interest (ROI) and binning for the most flexibility in framing your subject.
Output Hardware Trigger: QSI cameras are able to produce a hardware signal from the Control Port to generate an external event such as a strobe.
Regulated Cooling: Successful long exposure imaging depends on CCD cooling. Sensor cooling significantly reduces the dark current and the consequent thermal noise in an image, making long exposures realistic.
QSI 600 Series cameras use a very efficient thermo-electric cooler (TEC) which relies on the 'Peltier Effect' to cool the CCD. When power is applied to a TEC, one side of the device gets cold and other side gets hot, essentially pumping heat from the cold side to the hot side. All QSI 600 Series cameras employ a two-stage TEC to increase the differential cooling effect. The more power applied to the TEC, the greater the differential cooling and the colder the CCD can get. The heat pumped from the CCD, as well as the power dissipated by the TEC, creates a significant amount of excess heat that must be removed from the camera. The back of a QSI 600 Series camera acts as a large heatsink with cooling fins machined directly into the body. Two automatically controlled cooling fans force air through these fins. The movement of air through the cooling fins greatly increases the amount of heat removed from the camera. Keep in mind that the lowest temperature that the CCD can be cooled is limited by the ambient air temperature and the speed of the cooling fans. Achieving very low temperatures is easy when imaging outdoors during cooler weather. If it is particularly cold you may not even need to turn the fans on, but if it is too warm you may need the help of Liquid-Assisted Cooling, which is available optionally.
Power Efficiency: Power efficiency is one of the hallmarks of QSI 600 Series cameras. Fully configured WS cameras operate via a 12v DC power supply and consume under 24 watts at full cooling with the filter wheel moving and both fans working at maximum. Power consumption for other camera model configurations can be as low as 5 watts. An approved 12 volt DC power supply with an input voltage range of 90-240V, 50-60HZ is included with each camera.
Notification: Both visual and audible notification is built into all 600 Series cameras. A multi-color LED status display provides visual indication of the various states of camera operation. The behavior of the indicator is configurable and can be disabled by user command. A unique internal beeper provides audible feedback of camera operation and status. Like the visual display, the beeper can be configured and disabled by the user.
QSI 6120wsg Monochrome CCD Camera Specifications
- Body Type: Integrated Guider Port Enclosure
- Shutter: Mechanical (Sensor has electronic shutter)
- Minimum Exposure: 0.03 seconds
- Maximum Exposure: 240 minutes
- Integrated Filter Wheel: 5-position for 1.25" filters (upgradeable to 31 mm)
- Integrated Guide Port: Yes
- Dimensions: 4.45" width x 4.45" height" x 3.08" depth
- Weight: 46 oz.
- Thermoelectric CCD Cooling: Temperature regulation +/- 0.1°C, @ 0°C to -40°C CCD temperature
- Cooling in Free Air, Fans @ Full Speed: Typically 40°C below ambient air with 85% cooling power
- Liquid Cooling (Optional) - Fans Off: Typically 45°C below circulating liquid with 85% cooling power (adds 0.75" to camera depth)
- Cooling Fan Control: Intelligent, user configurable
- Read Rate: User selectable High Quality mode at 800 KHz, High Speed mode at 8 MHz
- Camera Gain: User selectable High Gain 0.13 e-/ADU (default), Low Gain 0.28 e-/ADU
- Digital Resolution: 16 bits in both High Quality and High Speed modes
- Total System Read Noise: <4 electrons RMS (typically <3.5 e- RMS, CCD specification limited) in High Quality mode (typically <7 e- RMS (CCD specification limited) in High Speed mode
- Pixel Dark Current: <0.002 electrons per second at -10°C
- Full Image Read and Download Time: Typically <16 seconds (host computer dependent) in High Quality Mode (800 KHz), <2 seconds in High Speed Mode (8 MHz), Image download times will be reduced with binning and/or subframe (ROI)
- Binning Modes: Symmetrical and Asymmetrical binning up to 9 pixels horizontally or vertically
- Status and Notification: User configurable multi-color LED status indicator and multifunction audible beeper. Over-temperature and high/low voltage alarms.
- Power Consumption: 12v, 2A (24 watts) at max cooling, max fans and filter moving (25 AC watts max with included 90-240V AC power supply)
- Operating Environment: Temperature: -20°C to 30°C, Humidity 10% to 90% non-condensing
- Computer Connectivity: USB 2.0 High Speed (USB 1.1 compatible)
- Other Ports: Optically isolated 4-channel control port for telescope guiding or input/output shutter trigger (See API Reference Manual for details)
- Included T-Mount Adapter: 42x0.75 mm t-thread
- Nosepiece; T-Mount Adapter to 2"
Sony ICX834 Sensor Specifications
- CCD Sensor: Sony ICX834 monochrome
- CCD Architecture: Interline Transfer
- Microlens: Yes
- Anti-blooming: Yes - 800x suppression
- Imager Size: 13.2 mm x 8.8 mm
- Pixel Array (Active): 4250 x 2838
- Pixel Size: 3.1 µm square
- Full Well Depth: 9,000 e-
- Absolute Quantum Efficiency Peak: 77% at 550 nm
- Pixel Dark Current: <0.002 electrons per second at -10°C
- Intrinsic Read Noise: 1.6 electrons RMS
- Dynamic Range: 75 db