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Summary of Contents for Moravian Instruments G4-9000
- Page 1 G4 Series Mark II Cooled CCD Cameras User’s Guide...
- Page 2 Version 1.1 Modified on July 27 , 2018 All information furnished by Moravian Instruments is believed to be accurate. Moravian Instruments reserves the right to change any information contained herein without notice. G4 cameras 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 ....................5 G4 Camera Overview ..................8 CCD and Camera Electronics ............... 11 CCD sensor ....................12 Model G4-9000 ................... 13 Model G4-16000 ................. 13 Camera Electronics .................. 13 Model G4-9000 ................... 14 Model G4-16000 ................. 14 Cooling and power supply ................ - Page 4 Desiccant containers for Standard cooling and Enhanced cooling cameras ....................33 Changing the Telescope Adapter ............34 Power Supply Fuse .................. 35...
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Page 5: Introduction
Introduction Thank you for choosing the Moravian Instruments camera. The cooled G4 series Mark II CCD cameras were developed for imaging under extremely low-light conditions in astronomy, microscopy and similar areas. Design of this series inherits from earlier G4 Mark I cameras, but brings some significant enhancements. - Page 6 2. Is compatible with a PC standard and runs 32 or 64-bit Linux operating system. Drivers for 32-bit and 64-bit Linux systems are provided, but the SIPS camera control and image processing software, supplied with the camera, requires Windows operating system. 3.
- Page 7 with voltage drop on long USB cables or with drawing of laptop batteries etc. Also note the camera must be connected to some optical system (e.g. the telescope) to capture images. The camera is designed for long exposures, necessary to acquire the light from faint objects. If you plan to use the camera with the telescope, make sure the whole telescope/mount setup is capable to track the target object smoothly during long exposures.
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Page 8: G4 Camera Overview
G4 Camera Overview G4 camera head is designed to be easily used with a set of accessories to fulfil various observing needs. The cameras do not allow usage of internal filter wheel as the large sensors require large 50×50 mm filters. External filter wheel is then the only option for G4 camera. - Page 9 Figure 2: Schematic diagram of G4 camera system components...
- Page 10 Components of G4 Camera system include: 1. G4 camera head with standard cooling 2. G4 camera head with Enhanced Cooling (EC) option Both variants of camera head are capable to control the External Filter Wheel 3. External Filter Wheel “M” size (5 positions) 4.
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Page 11: Ccd And Camera Electronics
CCD and Camera Electronics G4 series of CCD cameras are manufactured with “Full Frame” CCD sensors manufactured by On Semiconductor (formerly Kodak). Almost all Full Frame CCD detector area is exposed to light, which ensures quantum efficiency provided but these sensors. Modern FF CCD detectors are suitable also for scientific applications, even if equipped with so-called Anti Blooming Gate (ABG –... -
Page 12: Ccd Sensor
G4 camera models: Model G4-9000 G4-16000 CCD sensor KAF-09000 KAF-16803 Resolution 3056 × 3056 4096 × 4096 Pixel size 12 × 12 μm 9 × 9 μm Sensor area 36.8 × 36.8 mm 36.9 × 36.9 mm Color mask CCD sensor Quantum efficiency (sensitivity) of CCD detectors used in G4 cameras depends on the particular camera model. -
Page 13: Model G4-9000
Model G4-9000 G4-9000 uses 9 MPx CCD OnSemi KAF-09000. Resolution 3056 × 3056 pixels Pixel size 12 × 12 μm Imaging area 36.8 × 36.8 mm Full well capacity Approx. 110 000 e Dark current 0.5 e-/s/pixel at 0°C Dark signal doubling 7 °C... -
Page 14: Model G4-9000
Preview read mode provides system read noise approx. 1 or 2 e above CCD chip read noise. Low Noise read mode is somewhat slower, but ensures system read noise roughly equal to the manufacturer-specified chip read noise. Model G4-9000 Gain 1.5 e /ADU (1×1 binning) 1.7 e /ADU (other binnings) -
Page 15: Cooling And Power Supply
Cooling and power supply Regulated thermoelectric cooling is capable to cool down the CCD chip from 42 to 47 °C below ambient temperature, depending on the camera type. The Peltier hot side is cooled by fans. The CCD chip temperature is regulated with ±0.1 °C precision. -
Page 16: Power Supply
The camera head contains two temperature sensors – the first sensor measures directly the temperature of the CCD chip. The second one measures the temperature inside the camera shell. The cooling performance depends on the environmental conditions and also on the power supply. If the power supply voltage drops below 12 V, the maximum temperature drop is lower. - Page 17 Camera head supply 12 V DC Camera head power consumption 15 W without cooling 52 W maximum cooling Power connector 5.5/2.5 mm, center + Adapter input voltage 100-240 V AC/50-60 Hz Adapter output voltage 12 V DC/5 A Adapter maximum power 60 W Figure 6: 12 V DC/5 A power supply adapter for G4 camera Power consumption is measured on the AC side of the supplied 12 V...
- Page 18 G4 camera measures its input voltage and provides it to the control software. Input voltage is displayed in the Cooling tab of the CCD Camera control tool in the SIPS. This feature is important especially if you power the camera from batteries.
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Page 19: Mechanical Specifications
Mechanical Specifications Compact and robust camera head measures only 154×154×65 mm (approx. 6×6×2.6 inches) for the model with standard cooling. Enhanced cooling increases camera depth by 11 mm. 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, no other parts (CPU box, USB interface, etc.), except a “brick”... -
Page 20: Camera Without Filter Wheel
Camera without filter wheel Figure 7: G4 camera head front view dimensions Figure 8: G4 camera head side view dimensions... -
Page 21: Enhanced Cooling Variant
Figure 9: G4 camera head bottom view dimensions Enhanced cooling variant Figure 10: G4 camera head with Enhanced cooling side view dimensions... -
Page 22: Camera With "M" External Filter Wheel
Camera with “L” External filter wheel Figure 11: G4 camera head with External filter wheel front view dimensions Figure 12: G4 camera head with External filter wheel side view dimensions... -
Page 23: Enhanced Cooling With External Filter Wheel Variant
Figure 13: G4 camera head with External filter wheel bottom view dimensions The “M” sized External Filter Wheel diameter is smaller (see External Filter Wheel User's Guide), but the back focal distance of all external filter wheels is identical. Enhanced cooling with External filter wheel variant Figure 14: G4 camera head with Enhanced cooling and External filter wheel side view dimensions... -
Page 24: Optional Accessories
Optional accessories Various accessories are offered with G4 Mark II cameras to enhance functionality and help camera integration into imaging setups. Telescope adapters Usage of many common types of telescope and lens adapters are ruled out by very large sensor used in G4 Mark II cameras. The CCD diagonal dimension of G4 cameras is 52 mm, which is greater than outer dimensions of many adapter kinds. -
Page 25: Attaching Camera Head To Telescope Mount
Figure 15: OAG on G4 camera with thick adapter base G4-OAG is manufactured with M68×1 thread with the back focal distance 61.5 mm. If the OAG is used on camera without filter wheel, thicker adapter base must be used to keep the Back focal distance and to allow the guiding camera to reach focus. -
Page 26: Camera Head Color Variants
photographic lens, directly to various telescope mounts supporting this standard. Figure 16: 1.75" bar for standard telescope mounts Camera head color variants Camera head is available in several color variants of the center plate. Visit manufacturer's web pages for current offering. Figure 17: G4 camera color variants... -
Page 27: Gx Camera Ethernet Adapter
Gx Camera Ethernet Adapter Gx Camera Ethernet Adapter allows connection of up to 4 Gx cameras of any type on the one side and 1 Gbps Ethernet on the other side. This adapter allows access to connected Gx cameras using routable TCP/IP protocol over practically unlimited distance. -
Page 28: Adjusting Of The Telescope Adapter
Adjusting of the telescope adapter All telescope/lens adapters of the G4 Mark II series of cameras can be slightly tilted. This feature is introduced to compensate for possible misalignments in perpendicularity of the telescope optical axis and sensor plane. Figure 19: Releasing of the “pushing” screw The Mark II camera telescope adapters are attached using three “pulling”... - Page 29 Because the necessity to adjust two screws (one pushing, one pulling) at once is inconvenient, the adapter tilting mechanism is also equipped with ring-shaped spring, which pushes the adapter out of the camera body. This means the pushing screws can be released and still slight releasing of the pulling screw means the distance between the adapter and the camera body increases.
- Page 30 Adjustable telescope/lens adapters are attached slightly differently depending if the adapter is attached directly to the camera head (e.g. when camera is equipped with internal filter wheel) or to the External filter wheel case. If the External filter wheel is used, the adapted base is not necessary, as the Mark II External filter wheel front plate is already designed to hold the spring and it also contains threads to fix respective adapters.
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Page 31: Camera Maintenance
Camera Maintenance The G4 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. Desiccant exchange The G4 camera cooling is designed to be resistant to humidity inside the CCD chamber. -
Page 32: Exchanging The Silica-Gel
transparent without any color hue when it becomes wet. It is recommended to shorten replacement interval if the silica-gel is completely transparent upon replacement. If it is still yellow-orange, it is possible to prolong the replacement interval. Figure 22: Silica-gel container is accessible from the camera back side Exchanging the silica-gel G4 Mark II cameras employ the same desiccant container like the G3 and G2 cameras. - Page 33 aluminum parts only. So, it is possible to heat the whole container to desired temperature without risking of the temperature-induced sealing damage. This design also allows usage of some optional parts: Threaded hermetic cap, which allows sealing of the dried container when it is not immediately attached to the camera head.
- Page 34 Changing the Telescope Adapter All adapters of the Mark II cameras are attached using three “pulling” screws. As the adapter tilt is adjustable, another three “pushing” screws are intended to fix the adapter in place. If the adapter has to be replaced for another one, it is necessary to unscrew the three pulling screws.
- Page 35 Power Supply Fuse The power supply inside the camera is protected against connecting of inverted-polarity power plug or against connecting of too-high DC voltage (above 15 V) by a fuse. If such event happens and the cooling fans on the back side of the camera do not work when the camera is connected to proper power supply, return the camera to the service center for repair.