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Related Manuals for Moravian Instruments G2-0402
Summary of Contents for Moravian Instruments G2-0402
- Page 1 G2 CCD Camera User's Guide...
- Page 2 Version 3.1 Modified on March 11 , 2016 All information furnished by Moravian Instruments is believed to be accurate. Moravian Instruments reserves the right to change any information contained herein without notice. G2 CCD devices are not authorized for and should not be used within Life Support Systems without the specific written consent of the Moravian Instruments.
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Page 3: Table Of Contents
Table of Contents Introduction....................4 G2 Camera Overview..................6 CCD and Camera Electronics.................9 CCD Chip....................12 Model G2-0402.................13 Model G2-1600.................13 Model G2-3200.................14 Model G2-8300.................14 Model G2-2000.................14 Model G2-4000.................15 Camera Electronics.................15 Model G2-0402.................16 Model G2-1600.................16 Model G2-3200.................17 Model G2-8300.................17 Model G2-2000.................17 Model G2-4000.................17 CCD Cooling and Power Supply..............18 Power Supply..................18... -
Page 4: Introduction
Introduction Thank you for choosing the G2 CCD camera. The cooled, slow-scan series of G2 cameras were developed for imaging under extremely low-light conditions in astronomy, microscopy and similar areas. The development team focused to every detail of camera mechanics, cooling, electronics and software to create state-of-the-art product. - Page 5 But keep on mind that if more USB devices connected to one hub need to communicate with a host PC, USB hub shares its single up link line to the host PC. Although G2 CCD cameras can operate through a USB hub, it can negatively affect the camera performance, like download time etc.
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Page 6: G2 Camera Overview
G2 Camera Overview G2 camera head is designed to be easily used with a set of accessories to fulfill various observing needs. Camera head itself is manufactured in two different variants: Camera with internal filter wheel. ● Camera with control port for external filter wheel. This model allows ●... - Page 7 Illustration 2: Schematic diagram of G2 camera system components...
- Page 8 Components of G2 Camera system include: 1. G2 camera head with internal filter wheel. 2. G2 camera head without internal filter wheel, ready for attaching of external filter wheel. 3. G0 Guider camera. 4. G1 Guider camera. G0 and G1 cameras are completely independent devices with their own USB connection to the host PC.
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Page 9: Ccd And Camera Electronics
CCD and Camera Electronics G2 series of CCD cameras are manufactured with two kinds of CCD detectors: G2 cameras with Kodak KAF Full Frame (FF) CCD architecture. ● Almost all Full Frame CCD detector area is exposed to light. This is why these detectors provide very high quantum efficiency. - Page 10 G2 cameras with Kodak KAI Interline Transfer (IT) architecture. ● There is a shielded column of pixels just beside each column of active pixels on these detectors. The shielded columns are called Vertical registers. One pulse moves charge from exposed pixels to shielded pixels on the end of each exposure.
- Page 11 G2 camera models with Full Frame CCD detectors: Model G2-0402 G2-1600 G2-3200 G2-8300 CCD chip KAF-0402ME KAF-1603ME KAF-3200ME KAF-8300 Resolution 768×512 1536×1024 2184×1472 3358×2536 9×9 µm 9×9 µm 6.8×6.8 µm 5,4×5,4 µm Pixel size CCD area 6.9×4.6 mm 13.8×9.2 mm 14.9×10.0 mm...
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Page 12: Ccd Chip
mask. Color filters of three basic colors (red, green, blue) cover all pixels, so every pixels detects only light of particular color. These cameras are able to acquire color image in single exposure, without the necessity to change color filters. On the other side color mask brings lower sensitivity and limits the capability to perform exposures using narrow-band filters etc. -
Page 13: Model G2-0402
Illustration 6: Dark current of Kodak CCD detectors, used in G2 cameras Model G2-0402 G2-0402 model uses 0.4 MPx Kodak KAF-0402ME. Resolution 768×512 pixels Pixel size × 9 µm Imaging area × 4.6 mm Full well capacity Approx. 100 000 e Output node capacity Approx. -
Page 14: Model G2-3200
Dark current /s/pixel at 0°C Dark signal doubling 6.3 °C Model G2-3200 G2-3200 model uses 3.2 MPx Kodak KAF-3200ME. Resolution × 2184 1472 pixels Pixel size 6.8 µm × Imaging area × 14.9 10.0 mm Full well capacity Approx. 55 000 e Output node capacity Approx. -
Page 15: Model G2-4000
Full well capacity Approx. 40 000 e Output node capacity Approx. 80 000 e Dark current 0.3 e /s/pixel at 0°C Dark signal doubling 7 °C KAI-2020 CCD detector with color (Bayer) mask can be used in the G2-2000C camera. Model G2-4000 G2-2000 uses 4 MPx CCD Kodak KAI-4022. -
Page 16: Model G2-0402
USB 2.0 high-speed USB 1.1 full-speed compatible Binning can be combined independently on both axes. Image download time and system read noise depends on the CCD chip used in particular camera model. Model G2-0402 Gain 1.5e /ADU (1×1 binning) 2.0e... -
Page 17: Model G2-3200
Model G2-3200 Gain 0.8 e /ADU (1×1 binning) 1.3 e /ADU (other binnings) System read noise (Low Noise mode) 10 e (Preview mode) Full frame download 5.5 s (Low Noise mode) 3.8 s (Preview mode) Model G2-8300 Gain 0.4 e /ADU (1×1 binning) 0.8 e /ADU (other binnings) -
Page 18: Ccd Cooling And Power Supply
CCD Cooling and Power Supply Regulated two-stage thermo-electric cooling is capable to cool the CCD chip up to 50 °C below ambient temperature. The Peltier hot side is cooled by a fan. The CCD chip temperature is regulated with ±0.1 °C precision. High temperature drop and precision regulation ensure very low dark current for long exposures and allow image proper calibration. - Page 19 source including batteries, wall adapters etc. Universal 100-240 V AC/50- 60 Hz, 60 W “brick” adapter is supplied with the camera. Although the camera power consumption does not exceed 30 W, the 60 W power supply ensures noise-free operation. Camera head supply 12 V DC Camera head power consumption 30 W Adapter input voltage...
- Page 20 Warning: The power connector on the camera head uses center-plus pin. Although all modern power supplies use this configuration, always make sure the polarity is correct if you use own power source.
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Page 21: Mechanical Specifications
Mechanical Specifications ×11 ×65 Compact and robust camera head measures only 114 mm (approx. × ×2.6 inches). The head is CNC-machined from high-quality aluminum and black anodized. The head itself contains USB-B (device) connector and 12 V DC power plug. Integrated mechanical shutter allows streak-free image readout, as well as automatic dark frame exposures, which are necessary for unattended, robotic setups. - Page 22 Illustration 8: G2 camera head front view dimensions Illustration 9: G2 camera head with internal filter wheel side view dimensions...
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Page 23: Telescope Adapters
Illustration 10: G2 camera head with external filter wheel side view dimensions Telescope adapters Various telescope and lens adapters for the G2 cameras are offered. Users can choose any adapter according to their needs and another adapters can be ordered separately. It is possible to choose among various telescope/lens adapters: 2"... - Page 24 T-thread with × 0.75 mm inner thread, 55 mm BFD preserves 55 mm back focal distance. Adapter with inner thread M48×0.75 thread × short 0.75, 7.5mm thick Adapter with inner thread M48×0.75 thread × with 55 mm BFD 0.75, preserves 55 mm back focal distance.
- Page 25 Nikon F lens Standard Nikon F bayonet adapter adapter. If the mounting standard defines also back focal distance (distance from adapter front plane to detector), the particular adapter is constructed to preserve defined distance (for instance T-thread defines back focal distance to 55 mm, but certain distance is defined also for Pentax (Praktica) thread, for Canon EOS and Nikon bayonets etc.).
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Page 26: Camera Maintenance
Camera Maintenance The G2 CCD camera is a precision optical and mechanical instrument, so it should be handled with care. Camera should be protected from moisture and dust. Always cover the telescope adapter when the camera is removed from the telescope or put the whole camera into protective plastic bag. -
Page 27: Changing The Silica-Gel
Warning: The 120 °C limit is valid for large-grain (3 to 5 mm) silica-gel, supplied with revision 4 cameras. Silica-gel supplied with earlier revisions could be dried at 160 °C. But such high temperature can damage the large-grain silica-gel. The silica-gel used in G2 cameras changes its color according to amount of water absorbed –... - Page 28 unscrewed e.g. by a coin. Pour out wet silica-gel and fill the chamber with a dry one. The desiccant chamber can be filled with a hot silica- gel without a danger of damaging of the container. The desiccant container can be left open without the fear from contamination of CCD chamber interior by dust.
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Page 29: Changing Filters
The sealed cap as well as the tool-less container are not supplied with the camera, the are supplied only as optional accessory. Illustration 12: Optional cap, standard container and the tool-less variant of the container Changing Filters It is necessary to open the camera head to change filters or the whole filter wheel. - Page 30 cables, connecting the filter wheel motor and the filter position optical bar, plugged into the electronics board. It is not necessary to unplug these cables to change filters, but if you unplug them, take care to connect them again in the proper orientation! Illustration 13: Filter positions are marked on the filter wheel Illustration 14: Filters cane be exchanged after removing of the camera front cover...
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Page 31: Changing The Whole Filter Wheel
Changing the Whole Filter Wheel The whole filter wheel can be changed at once. It is necessary to remove the front part of the camera case the same way as in the case of changing filters. The filter wheel can be removed when you unscrew the bolt on the center of the front part of camera case. -
Page 32: G2 Camera Revisions
G2 Camera Revisions G2 series of CCD cameras underwent several revisions, each implementing various enhancements, new printed circuits boards with latest electronics components and utilizing all gained experience and new ideas. Revision 1 The first introduced G2 camera. Only G2-0400 model with KAF0402ME CCD was available in this revision. -
Page 33: Revision 3
G2-0402. Digital electronics was completely overhauled and upgraded to USB ● 2.0 interface with 480 Mbps transfer speed. The air intake vents shaping was slightly changed to make the camera ● somewhat quieter. This revision still used two fans. -
Page 34: Revision 4
(accessible from the outside). Number of models of G2 cameras were offered – KAF detector ● variants (G2-0402, G2-1600, G2-3200), KAI detector variants (G2- 2000, G2-4000) and also “astrophotographic” model with ABG KAF detector (G2-8300). - Page 35 The G2 revision 4 shell underwent a slight facelift. Camera is less ● “boxy” and more similar to bigger G3 and G4 models. Air intake vents are better protected against unwanted interference of rotating fans with either fingers of various wires (hitting a rotating fan with finger is not dangerous, only somewhat unpleasant).
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