The QHY411 is the largest resolution cooled CMOS camera in the world. The 150 Megapixel SONY IMX411BSI back-illuminated sensor has a 14192 x 10640 pixel array with 3.76um pixels. The sensor size is 54mm x 40mm. Ultra low dark noise. QHY411 has both mono and color version.
Most CMOS sensors are 12-bit or 14-bit. This means that the conversion ratio cannot achieve 1e-/ADU and weak signals are not very highly sampled. Photometric measurements of low signals in such case are not as accurate. Some camera combine two 12-bit outputs to create 16-bit images, but the actual number of levels is still 4096 x 2 = 8192 levels. Still less than native 16-bits. The QHY411 is the world's first scientific CMOS camera with native 16-bit A/D on-chip. The output is real 16-bits with 65536 levels.
One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. Even with unbinned 3.76um pixels the QHY411 has a full well capacity of 50ke- and >80ke in extend mode. When binned 2x2 to 7.5um the full well is 200ke- and when binned 3x3 to 11um the full well is 450ke-.
The QHY411 has only one electron of read noise at high gain and 1FPS(16bit),2FPS(8bit) high readout speed. One electron of read noise means the camera can achieve a SNR>3 at only 4 to 6 photons. This is perfect performance when conditions are photon limited, i.e., short exposures, narrow band imaging, etc., making this large area sensor ideal for sky surveys and time domain astronomy.
The QHY411 is a back-illuminated Scientific CMOS camera with extremely low dark current using SONY's Exmor BSI CMOS technology.In general, the fan-blade mechanical shutter will be broken if it is used 200,000 times or so, and in some specific cases it is easy to fail to switch on or off. The advantage of electronic shutter over mechanical shutter is high reliability and stability when the observatory shoots a large number of pictures. The electronic shutter is a relatively perfect choice for the observatory.
The 150 Megapixel QHY411 uses the world largest resolution single sensor.
The QHY411 comes in two versions, USB3.0 and 10GigaE. The USB3.0 supports 1FPS readout speed. Each image is 300MByte. The 10GigaE version supports 2.6FPS readout speed.
The QHY411 has Air / Liquid Cooling with 2-stage TE Cooler.