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.
As a result the dark current of the camera is:
QHY367C Pro: 0.0015e-/p/s at -15C
Model
QHY128C
QHY367PRO-C
CMOS Sensor
Sony IMX128
Sony IMX094
Mono/Color
Color
FSI/BSI
FSI
Pixel Size
5.97um*5.97um
4.88um*4.88um
Effective Pixel Area
6036 * 4028
7376*4938
Effective Pixels
24MP
36MP
Sensor Size
Full Format
36mm*24mm
Fullwell
74ke-
56ke-
AD Sample Depth
14-bit
14bit
Full Frame Rate
5FPS
3.2FPS
Readout Noise
1.8e- to 4e-
2.4e- to 3.2e-
Dark Current
0.0006e/pixel/sec @ -15C
0.0015e/pixel/sec @-15C
Exposure Time Range
60us-3600se
60us-3600sec
Unity Gain
3300
2800
Amp Glow
Zero Amp
Shutter Type
Electric Rolling Shutter
Computer Interface
USB3.0
Built-in Image Buffer
128MB DDR2 Memory
Cooling System
Dual Stage TEC cooler(about -35C below ambient)
(Test temperature +20°)
Dual Stage TEC cooler(about -45C below ambient)
Optic Window Type
AR+AR High Quality Multi-Layer Anti-Reflection Coating (For color camera user need to add a UV/IR filter in the light path)
Anti-Dew Heater
Yes
Telescope Interface
M54/0.75
Back Focal Length
17.5mm
Weigth
788g
678g