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QHY461M CMOS IMAGER w/ PCIE grabber card and GPS



QHY411 is using the 150 Megapixel SONY IMX411 sensor, with 54*40mm image area, native 16bit ADC, Back-illuminated, while QHY461 is with SONY medium format IMX461 sensor,44*33mm,100mega pixels, back-illuminated,16bit ADC. The features of their sensor are quite similar but the IMX411 sensor is bigger. The QHY411 is so far the largest resolution cooled CMOS camera in the world.

 

 

The QHY411/461 has both USB3.0 and 2*10GigaE interfaces. The 2*10GigaE version supports a higher readout speed.

 

QHY411/QHY461 have both mono and color version. The application of this camera includes astronomy imaging, astronomy photography, space object survey, satellite tracking, etc

 

Native 16 bit A/D

The new Sony sensor has native 16-bit A/D on-chip. The output is real 16-bits with 65536 levels. Compared to 12-bit and 14-bit A/D, a 16-bit A/D yields higher sample resolution and the system gain will be less than 1e-/ADU with no sample error noise and very low read noise.

 

BSI

One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels.In a typical front-illuminated sensor, photons from the target entering the photosensitive layer of the sensor must first pass through the metal wiring that is embedded just above the photosensitive layer. The wiring structure reflects some of the photons and reduces the efficiency of the sensor.

In the back- illuminated sensor the light is allowed to enter the photosensitive surface from the reverse side. In this case the sensor’s embedded wiring structure is below the photosensitive layer. As a result, more incoming photons strike the photosensitive layer and more electrons are generated and captured in the pixel well. This ratio of photon to electron production is called quantum efficiency. The higher the quantum efficiency the more efficient the sensor is at converting photons to electrons and hence the more sensitive the sensor is to capturing an image of something dim.

 

Zero Amplify Glow

This is also a zero amplifer glow camera.

 

TRUE RAW Data

In the DSLR implementation there is a RAW image output, but typically it is not completely RAW.  Some evidence of noise reduction and hot pixel removal is still visible on close inspection.  This can have a negative effect on the image for astronomy such as the “star eater” effect.  However,  QHY Cameras offer TRUE RAW IMAGE OUTPUT and produces an image comprised of the original signal only, thereby maintaining the maximum flexibility for post-acquisition astronomical image processing programs and other scientific imaging applications.

 

Anti-Dew Technology

Based on almost 20-year cooled camera design experience, The QHY cooled camera has implemented the fully dew control solutions. The optic window has built-in dew heater and the chamber is protected from internal humidity condensation. An electric heating board for the chamber window can prevent the formation of dew and the sensor itself is kept dry with our silicon gel tube socket design for control of humidity within the sensor chamber.

 

Cooling

In addition to dual stage TE cooling, QHYCCD implements proprietary technology in hardware to control the dark current noise.

 

Model QHY411 QHY461
Image Sensor SONY IMX411 BSI CMOS Sensor SONY IMX461 BSI CMOS Sensor
Pixel Size 3.76um x 3.76um 3.76um x 3.76um
Color / Mono Version Both Available Both Available
Image Resolution 14304 x 10748 (Inlcudes the optic black area and over scan area) 11760 × 8896
Effective Pixels 151 Megapixels 102 Megapixels
Effective Image Area 54mm x 40mm 44mm x 33mm
Sensor Surface Glass AR+AR multi-coating Clear Glass AR+AR Multi-Coating Clear Glass
Full Well Capacity (1×1, 2×2, 3×3) 50ke- / 200ke- / 450ke- in Standard Mode
80ke- / 320ke- / 720ke- in Extend Fullwell Mode
50ke- / 200ke- / 450ke- in Standard Mode
80ke- / 320ke- / 720ke- in Extend Full Well Mode
A/D 16-bit (0-65535 greyscale) 16-bit (0-65535 greyscale) for 1X1Binning

 

18bit in 2X2   19BIT in 3X3  20BIT in 4*4 software Binning

Sensor Size TYPICAL 4.2inch TYPICAL 3.4inch
Read Noise Apporx 1 to 3 e (in HGC Mode) 1e to 3.7e (in HGC mode)
Dark Current Apporx 0.0011e/pixel/sec at -20C Approx 0.003e/pixel/sec @ -20C
Exposure Time Range 20us – 3600sec 50us – 3600sec
Frame Rate USB3.0 Port:
Full Frame Resolution  2FPS @ 8BIT    1FPS @ 16BIT
5000Lines   4FPS @ 8BIT    2FPS @16BIT
3000Lines   7FPS @ 8BIT    3.3FPS @16BIT
2000Lines   10FPS@8BIT    5.5FPS @16BIT
1000Lines   20FPS@8BIT    10FPS @16BIT
500Lines     35FPS@8BIT   19FPS @ 16BITFiber Port : TBD
2.7FPS @ 8BIT   1.3FPS@16BIT  on USB3.0
2.7FPS @ 16BIT   6FPS @ 14BIT on 10Gigabit Filber
Shutter Type Electric Rolling Shutter Electric Rolling Shutter
Computer Interface USB3.0 and 2*10Gigabit Fiber USB3.0 and 2*10Gigabit Fiber
Trigger Port Programmable TrigOut, High Speed Sync Port / GPS interface Port Programmable TrigOut, High Speed Sync Port / GPS interface Port
Filter Wheel Interface 4PIN QHYCCD CFW Port 4PIN QHYCCD CFW Port
Built-in Image Buffer 2GByte 2GByte
     
FPGA Upgrade Via USB Support Support
Cooling System Dual Stage TEC cooler(-35C below ambient with air cooling, -45C below ambient with ambient temperature water cooling). More deltaT below ambient can be achieve by using the cooled water cooling.

 

Fan Cooling/Water Cooling Compatible

Dual Stage TEC cooler(-35C below ambient with air cooling, -45C below ambient with ambient temperature water cooling). More deltaT below ambient can be achieve by using the cooled water cooling.

 

Fan Cooling/Water Cooling Compatible

Anti-Dew Heater Yes Yes
Telescope Interface Six Screw holes  (See mechanical drawing) Six Screw holes  (See mechanical drawing)
Optic Window Type AR+AR High Quality Multi-Layer Anti-Reflection Coating AR+AR High Quality Multi-Layer Anti-Reflection Coating
Back Focal Length 16mm(without tilt adjust ring)

 

28.5mm (with tilt adjust ring)

16mm (without tilt adjust ring)28.5mm (with tilt adjust ring)

 


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