QHY183C … 20mega pixel Back illumination cooled colour COLDMOS Camera
The QHY183C is a 1 inch, 20 megapixel colour back illuminated COLDMOS camera.
Pixel size is 2.4um, 15FPS @ 20megapixel.
Two stage cooling (40 to 45C below ambient) 10/12bit ADC and 8/12bit output with USB3 interface.
QHY183C is only available in a colour version.
Exposure range is from 50us to approx. 1000sec
Sony’s Image Sensor Exmor R is the back-illuminated CMOS image sensor with improved sensitivity and noise reduction – the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It has retained the advantages of CMOS image sensors such as low power consumption and high-speed operation
With a conventional front-illumination structure, the metal wiring and transistors on the surface of the silicon substrate that form the sensor’s light-sensitive area (photo-diode) impede photon gathering carried out by the on-chip lens, and this has also been an important issue in the miniaturisation of pixels and widening optical angle response.
A back-illuminated structure minimises the degradation of sensitivity to optical angle response, while also increasing the amount of light that enters each pixel due to the lack of obstacles such as metal wiring and transistors that have been moved to the reverse of the silicon substrate.
However, compared to conventional front-illuminated structures, back-illuminated structures commonly causes problems such as noise, dark current, defective pixels and colour mixture that lead to image degradation and also cause a decrease in the signal-to-noise ratio.
To overcome this Sony has newly developed a unique photo-diode structure and on-chip lens optimised for back-illuminated structures, that achieves a higher sensitivity and a lower random noise without light by reducing noise, dark current and defect pixels compared to the conventional front-illuminated structure. Additionally, Sony’s advanced technologies such as high-precision alignment have addressed any colour mixture problems.
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The QHY367C full frame cooled CMOS camera uses the Sony IMX094 36 megapixel, 14bit sensor. This sensor is also used in the Nikon D810A camera. Readout noise is 3.2e at lowest gain and 2.4e at unity gain. Dynamic range is > 14 Stops.
The QHY6 is a cooled 16 bit camera with a sensitive 1/3″ Mono EXview CCD that offers excellent guiding performance and deep sky imaging. It can be used without external power, for guiding, or with a 12 volt supply for cooled long exposure imaging.