QSI 6120WSG-8 Cooled Monochrome CCD Camera with Internal 8-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
The 6120wsg, as with all QSI 600 series cameras, delivers up to 8 MHz dual read rates with high speed USB 2.0 and full 16-bit output for superior quality images featuring high frame rates, exceptionally wide dynamic range, excellent linearity, and extremely low noise. Regulated cooling down to over 45ºC, or 50ºC with an optional Liquid Heat Exchanger, is achieved via custom two-stage TEC.
All QSI 600 Series cameras utilize High Speed USB 2.0 port (USB 1.1 compatible) for connection to the host computer and imaging application software. Read and transfer time for an entire 2048 x 2048 image frame is typically approximately 1/2 second in High Speed mode and less than 7 seconds in High Quality mode. The frame rate can be further increased by reading just a portion of the image (ROI) or with flexible on-chip binning.
With QSI 600 Series cameras, you'll enjoy superior imaging performance and spectacular power efficiency with upgrade capabilities to protect your investment all wrapped up in an eye-pleasing compact design. The refined engineering and remarkable fit, finish, and attention to detail displayed by this camera will blow away even your highest expectations.
QSI 6120wsg Monochrome CCD Camera Features
Sony ICX834 CCD Sensor: The QSI 6120wsg camera uses the Sony ExView Interline Transfer CCD image sensor, and sports both micro lens technology and anti-blooming protection. The 12 MP Sony ICX834 uses 3.1 µm x 3.1 µm pixels with a photoactive image array of 4250 x 2838. The ICX834 has exceptional sensitivity across the visual band with peak quantum efficiency of 77% along with remarkably low dark current.
Mechanical Shutter: This 6120wsg camera from QSI comes with 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: To accommodate both an internal 8-position color filter wheel and an integrated guide port, this QSI 600 series camera uses a WSG body. Constructed of CNC machined aircraft grade aluminum, the QSI 6120wsg camera body was engineered with extensive use of advanced CAD-CAM design tools. Elegantly finished anodized body components are built using corrosion resistant stainless steel hardware throughout. Filter wheel accepts standard threaded 1.25" filters*.
Integrated Guide Port (IGP): The QSI 6120wsg's Integrated Guider Port functions by taking a portion of the light from your main telescope and redirecting it via a pick-off prism to a separate guide camera attached to the 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 8-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.
Measuring 1/2" square, the pick-off prism is optimally placed close to the internal filter wheel barely outside the field of view of the main sensor to support the use of guide cameras with large sensors while the main sensor vignetting is prevented even with extremely 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: Pixel depth is a full 16-bits per pixel for the smoothest color and gray scale transitions and the lowest noise.
Selectable ROI and Binning: Every QSI camera features selectable Region of Interest (ROI) and binning for high flexibility in framing your subject.
Output Hardware Trigger: QSI cameras are capable of generating a hardware signal from the Control Port to produce an external event like a strobe.
Regulated Cooling: For successful long exposure imaging, cooling the CCD is crucial. Sensor cooling drastically minimizes an image's dark current and resulting thermal noise to make long exposures a realistic undertaking.
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: One of the defining features of the 600 Series cameras is power efficiency. A fully configured WS camera operates from a single 12v DC supply and consumes less than 24 watts at full cooling, with both fans at maximum and the filter wheel moving. Other camera model configurations have power consumption as low as 5 watts. Included with each camera is an approved 12 volt DC power supply with an input voltage range of 90-240V, 50-60HZ.
Notification: All QSI 600 Series cameras offer both visual and audible notification. Various states of camera operation are indicated by a multi-color LED status display. Indicator behavior can be modified or disabled entirely by the user. Aural feedback of camera operation and status is provided by a unique internal beeper. As with the visual display, this beeper can be modified or disabled by user command.
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: 8-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 (WxH): 13.2mm x 8.8mm
- Pixel Array (WxH): 4250 x 2838 active (12 megapixels)
- Pixel Size: 3.1µm x 3.1µm
- Pixel Full Well Depth: 9,000 e-
- Absolute Quantum Efficiency Peak: 77% at 560nm
- Pixel Dark Current: <0.002 electrons per second at -10°C
- Intrinsic Read Noise: 1.6 electrons RMS
- Dynamic Range: 75db