Features Specifications Application Download Manual Back

Model QHY411U3G20
Image Sensor SONY IMX411 BSI CMOS Sensor
Pixel Size 3.76um x 3.76um
Color / Mono Version Both Available (QHY411U3G20M  QHY411U3G20C)
Sensor Surface Glass AR+AR multi-coating Clear Glass
Image Resolution
14304*10748 (Inlcudes the optic black area and over scan area)
Effective Pixels
151 Megapixels
Effective Image Area
54mm x 40mm
Full Well Capacity (1x1, 2x2, 3x3)
50ke- / 200ke- / 450ke- in Standard Mode
80ke- / 320ke- / 720ke- in Extend Fullwell Mode
16-bit (0-65535 greyscale)
Sensor Size
TYPICAL 4.2inch
Sensor Type Back Illuminated (BSI) 
Read Noise Apporx 1 to 3 e (in HGC Mode)
Dark Current Apporx 0.0011e/pixel/sec at -20C
Exposure Time Range 20us - 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 @ 16BIT

Fiber Port : TBD

Shutter Type Electric Rolling Shutter
Computer Interface USB3.0 and 2*10Gigabit Fiber
Trigger Port TrigOut  High Speed Sync Port /GPS interface  
Filter Wheel Interface 4PIN QHYCCD CFW Port
Built-in Image Buffer 2GByte (16Gb)
Non-volatile memory / On camera storage Build-in total 64MByte Flash Memory. 10MBytes user-accessible space
for stellar ROI frames for analysis of exoplanet investigation, occultations, atmospheric seeing messurement, focus , optic analysis etc. Support 100*100 image x 500frames   50*50 image x4000frames. 25*25 image x16000frames 10*10 image *  250000 frames 
FPGA Upgrade Via USB 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
Anti-Dew Heater
Telescope Interface
Optic Window Type

AR+AR High Quality Multi-Layer Anti-Reflection Coating

Back Focal Length
16mm(without tilt adjust ring) 28.5mm (with tilt adjust ring)
Reference Price (Tax not included)

QHY411 Performance Curves

As a scientific camera, QHYCCD gives the maxium flexibility to access the setting of the camera and allow user to use all possible readout mode in the CMOS sensor. Currently there is totally 8 readout mode (In future we will active more). The eight readout modes is mode #0 to mode #7. The follwing graph is the system gain, readout noise and fullwell of each mode. Different mode has different behaviour in both fullwell, readout noise , and some other noise conditions.  You can select the suitable mode according the applications. You can also download the detailed messured data from this link (excel file)    

QHY411 QE. Since SONY has not release the absolutely QE curve of IMX411. There is only the relativity QE Curve.  QHYCCD did some test of absolutely QE for the 3.76um BSI sensor in another model. It can be used for just a reference.  This article can be found in https://www.qhyccd.com/index.php?m=content&c=index&a=show&catid=23&id=261

Regarding the linearity of QHY411, we conducted a preliminary linearity determination experiment. QHY411 data can be used to enable astronomical metering.
The experiment is to obtain a deviation of a fixed area by shooting the flat field plate with different exposure times. Then, after converting the conversion to a value in units of volume, the curve where the overlapping exposure time is increased and replaced by the image sensor is replaced.
In order to obtain relatively large full-scale range data. We used the QHY411 correction mode with a gain of 0 (GAIN = 60). The obtained curve is as follows. You can see from the picture. QHY411 has very good linearity in a wide range. When the full scale is greater than 75000e, the linearity begins to decrease, and the curve conforms to the general linearity of the image sensor in the near area.

QHY411 mechanical size chart

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  503, Block A, Singularity Center, Shahe Town, Changping District, Beijing, China, 102206




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