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Quantum Scientific Imaging

616 1.6mp Monochrome, Cooled CCD Camera


  • 4,30600

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QSI 616 1.6mp Monochrome
Cooled CCD Camera

  • Full-frame 1.6 megapixel KAF-1603 sensor
  • 1536x1024 9µm pixels
  • 16-bit output. Low noise, wide dynamic range
  • High Speed USB 2.0 and read rates up to 4 MHz
  • 2-Stage TEC w/ cooling to 45°C below ambient
  • Built-in mechanical shutter
  • Available 5 or 8-position color filter wheel
  • Available Integrated Guider Port
  • Broad Software support
  • ASCOM-compatible Windows COM API
  • Linux drivers and API

        The QSI 616 model camera employs a 1.6mp Kodak full-frame CCD image sensor with microlens technology. With high quantum efficiency, wide dynamic range, dual read rates, and internal 5 or 8-position color filter wheels the QSI 616 is ideally suited to a broad range of demanding scientific, medical, astronomical, and industrial imaging applications.

        The compact design of the QSI 600 Series allows the 616 to set a new benchmark for cost and size in a high performance, full-featured scientific CCD camera. With optional features and upgradeability, the QSI 616 can be tailored to fit your needs today and in the future.

        The 616 camera system is supported by industry leading image acquisition software plus a full camera control API is available for creating custom Windows or Linux applications.

        Shutter and Filter Subsystem
         
        The 600 Series achieves its compact size and unique configuration flexibility though an innovative shutter/filter subsystem. Both the mechanical shutter and filter wheel can be installed internally while keeping the growth of the camera dimensions at a minimum. This results in minimal loss of backfocus as these features are added. The compact design also reduces vignetting with fast optical systems.

        Shutter 

        The Model 616s camera incorporates QSI's proprietary internal, even-illumination mechanical shutter in the 'mid-size' camera body configuration. The shutter is not only used for timing exposures, but can be left closed to produce 'dark frames' for subsequent image processing. Exposures can be as short as 0.03 seconds or as long as 240 minutes. The shutter is rated for more than 1 million cycles. 

        Filter Wheel   

        The Model 616ws adds an internal five position filter wheel to the camera in a 'full-size' camera body. The 616ws-8 incorporates a larger 8-position filter wheel. The filter wheel accepts any standard threaded 1.25" filters. 

        The filter wheel can be easily removed and replaced to change or clean the glass filters. Additional filter wheels can be purchased allowing quick interchange of different filter set configurations.

        CCD Cooler Subsystem
         
        Key in the compact design of the 600 Series cameras is a very efficient custom 2-stage thermoelectric cooler (TEC) subsystem. Intelligent, programmable cooling fans are integrated into the rear of the camera body to remove the heat generated by the cooler. Typically, forced air cooling lowers the regulated CCD temperature by up to 45°C below ambient utilizing 85% power. Tight +/- 0.1°C temperature regulation is maintained at temperature settings of 10°C below ambient and lower. A slim liquid heat exchanger (shown at right) can be attached to the rear of the camera body to increase the cooling further, up to 55°C below the temperature of the circulating fluid.

        The cooled CCD image sensor is positioned in a hermetically sealed environmental chamber covered with an anti-reflection coated precision optical window. The chamber is purged with an ultra dry noble gas to increase heat conduction and eliminate the possibility of frost forming inside the chamber. To extend the useful period before re-purging is required, a user-rechargeable microsieve desiccant is employed to scavenge water molecules that enter the chamber. It is located behind a sub-micron, gas-permeable membrane to prevent particulate contamination of the CCD chamber. 

        Integrated Guider Port

        Selecting the best guiding solution for deep sky imaging has always required a compromise. The available Integrated Guider Port (IGP) solves many of the problems associated with existing guiding solutions. 

        The Right Guiding Solution

        Guiding with a separate guide scope provides the most flexibility, but differential flexure can be an issue, especially with long focal length scopes. With an internal guide chip, you're forced to guide with light through your filters and you can't guide at all while the shutter is closed or an image is being downloaded. This is especially problematic for narrowband imagers. To get around those issues, you could add an external off-axis guider, but a traditional OAG can add an inch or more of back focus plus more weight and two new mounting surfaces that need to be held rigidly.

        Guide with Light From in Front of the Filter Wheel

        The QSI 600 Series WSG models solves the problems with other guiding solutions by integrating a Precision Off-Axis Guider directly into the camera body with the pick-off prism positioned in front of the integrated color filter wheel – right where it belongs.

        Never Struggle With Finding a Guide Star

        One of the main challenges when using a camera with an internal guide chip is to find a star bright enough to guide by within the limited field of view of the internal guide sensor. When shooting through red, green or blue filters, ⅔ of the available light is blocked by the filter and not transmitted to the internal guider chip, guaranteeing lower signal-to-noise stars for guiding. This problem is compounded with narrowband filters where as little as 1% of the total light from a star reaches the guide chip. By positioning the pick-off prism in front of the filters, you alwayshave all the star's light available for guiding.

        Integrated Guide Port Supports Fast Optical Systems 

        By integrating the Off-Axis Guider into the camera, we're able to position the pick-off prism very close to the internal filter wheel adding minimal backfocus and eliminating any possibility of flexure or rotation compared to a traditional OAG. The large ½" square pick-off prism is optimally positioned close to the internal filter wheel, supporting the use of guide cameras with large sensors, while preventing any vignetting of the main sensor even with very fast optical systems.

        Flexible Guide Camera Options 

        The Integrated Guide Port (IGP) built into 600 Series WSG models is designed to support any camera with 12.5mm of back focus or less that can be attached using C-mount or T-mount threads. Many cameras are designed with 12.5mm of back focus to be compatible with CS-mount lenses. CS-mount lenses use the same thread as C-mount (1" x 32tpi) but with 12.5mm of back focus as opposed to 17.5mm for C-mount.

        Easy, Rigid Guide Camera Focusing

        The guide camera attaches to the WSG using a C-mount or T-mount threaded adapter (specified at time of order). The threaded adapter sits on top of the focus ring and allows the guide camera to be rotated to any position. The focus ring threads onto the focus base to allow 3mm of travel when focusing the guide camera. Once focus is achieved, the focus ring is locked with a set screw. The guide camera can still be rotated manually if desired without changing the focus. The end result is a rigid, easily focused guide camera that will not move or flex while your mount tracks the apparent motion of the night sky.

        Model 616 CCD Image Sensor Specifications 
         
        Feature Standard
        CCD Manufacturer & Model      Kodak KAF-1603ME        
        CCD Architecture Full Frame
             Blue Enhanced Yes
             Microlens Yes
             Anti-blooming No
        Imager Size: (WxH) 13.8mm x 9.2mm
        Pixel Array (WxH): 1552x1032 total pixels,
        1536x1024 active (visible)
        Pixel Size: 9µm x 9µm
          Typical Values
        Pixel Full Well Depth 100,000 electrons
        Absolute Quantum Efficiency Peak: 77%
        400nm: 45%
        Pixel Dark Current <1.0 electron per second at 0°C
        <0.1 electron per second at -25°C
        Dark Current Doubling 6.3° C
        Intrinsic Read Noise 15 electrons RMS
        Dynamic Range 76db
        Charge Transfer Efficiency >0.99999

         

        Model 616 Camera Specifications  

        Feature Model 616s Model 616ws(-8)
        CCD Image Sensor KAF-1603ME
        Electronic Shutter Mechanical, exposure range: 0.03 seconds to 240 minutes
        Mechanical Shutter Yes Yes
        Internal Color Filter Wheel No ws    - 5-Position CFW
        ws-8 - 8-position CFW
        Holds 1.25" or opt. 31mm filters
        Camera Body Configuration Medium
        Enclosure
        Full
        Enclosure
        Dimensions W4.45” x H4.45” x D2.00”
        (add 0.225" for T-Mount)
        5-pos, W4.45” x H4.45” x D2.50”
        8-pos, W5.86” x H5.56” x D2.50”
        (add 0.225" for T-Mount)
        Weight, without Nosepiece 34 oz.  /  950g 5-pos, 40 oz.  /  1130g
        8-pos, 51 oz.  /  1450g
        Optical Back Focus
        (w/o Filters in path)
        0.90" w/ T-mount adapter
        0.68" w/ C-mount adapter
        0.68" w/ no adapter
        1.40" w/ T-mount adapter
        1.18" w/ C-mount adapter
        1.18" w/ no adapter
        Thermoelectric CCD Cooling Temperature regulation +/- 0.1°C, @ 0°C  to -40°C CCD temperature
        In free air, 
        Fans @ Full Speed
        Typically 45°C below ambient air temperature with 85% cooling power
        With Opt Liquid Cooling - Fans Off Typically 52°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 800KHz, High Speed mode at 4MHz
        Camera Gain 2.6 electrons per ADU
        Digital Resolution 16 bits (both High Quality and High Speed mode)
        Total System Read Noise Typically 15 electrons RMS (CCD specification limited) in High Quality mode
        Typically 25 electrons RMS (CCD specification limited) in High Speed mode
        Pixel Dark Current <1.0 electron per second at 0°C
        <0.1 electron per second at -25°C
        Full Image Read and Download Time Typically <3 second (host computer dependent) in High Quality Mode (800KHz)
        Typically ~0.3 second (host computer dependent) in High Speed Mode (8MHz)
        Image download times will be reduced with binning and/or subframe (ROI)
        Binning Modes Symmetrical and Asymmetrical binning up to 9 pixels horizonally 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)
        T Mounting Adapter Standard - T-Thread, 42mm x .75mm pitch

        C Mounting Adapter
        (1" x 32TPI)
        (Not recommeded for 540i

        Optional, C-Mount (Type II) lens focus compatible 
        (17.5mm backfocus)
        Optional, for non-lens adapters and accessories 
        (standard C-Mount lens does not reach focus at infinity)
        Nosepiece Standard, T-Adapter to 2" nosepiece
        Optional, T-Adapter  to 1.25" nosepiece

         

        Additional Model 616wsg(-8) Camera Specifications  

        Feature QSI 600 Series wsg(-8)
        Camera Body Configuration Integrated Guider Port 
        Enclosure
        Dimensions 5-pos wsg,    W4.45” x H5.0” x D3.08”
        8-pos wsg-8, W5.86” x H6.1” x D3.08”
        (add 0.225" for T-Mount, 0.35" for 2.156" thread mount)
        Weight, without Nosepiece 5-pos, 46 oz.  /  1300g
        8-pos, 56 oz.  /  1600g
        Optical Back Focus
        (without Filters in path)
        2.10" (53.3mm) with 2.156" thread adapter (optional)
        1.98" (50.2mm) with T mounting adapter
        1.75" (44.5mm) w/o mounting adapter 
        Guide Camera Attachment  T-mount (42mm x 0.75mm) w/built-in manual rotator 
        C-mount (1" x 32 tpi) w/built-in manual rotator 
        Guide Camera Optical Focal Depth  12.5mm +/- 1.5mm (0.49" +/- 0.06") 
        Face Plate Adapter Standard adapter - T-mount (2.156" x 24tpi adapter available) 
        Nosepiece Standard T-mount to 2" nosepiece. 
        Optional 2" nosepiece for 2.156 adapter

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