Diffraction Limited’s line of high performance or “scientific grade” CCD and CMOS cameras are designed to operate under extremely low-light conditions with high sensitivity, low noise, and good linearity and dynamic range. Let’s discuss some of these factors in detail, and why they matter when choosing a detector. Detection performance of the camera is all about […]
I’m often asked how CMOS Active Pixel Sensors differ from CCD sensors in terms of image calibration. For me, as a camera designer and a user, it’s been something of a learning process—not all CMOS sensors behave the same way. There are some rather surprising differences compared to CCD sensors. The basic principles are largely […]
by Douglas George In order to get the best results from your equipment, it is important to match the resolution of your camera to the resolution of your optics. In conventional photography your lenses are highly adaptable, with adjustable f/ratio and often zoom capability (adjustable focal length). On dedicated science instruments such as telescopes and […]
by Doug George. Some people ask, “Why do we use desiccant plugs?” Simply put, they minimize life cycle cost and downtime. The imaging sensor needs to be below freezing in order to control dark current and noise. If the sensor is exposed to the atmosphere it will quickly be encased in ice. This not only […]
The Dragonfly Array consists of two telescope mounts, each carrying 24 ultra high contrast lenses. These off-the-shelf Canon lenses use new nano-fabricated coatings with sub-wavelength structure on the optical glass, which has unprecedented performance in reducing stray light and reflections. On the back of each of these 48 lenses is an SBIG STT-8300M camera. The […]
