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Astronomy and Cosmology
Astronomy and Astrophysics
Can you me with this Hershel telescope beam?
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[QUOTE="sophiecentaur, post: 5495793, member: 199289"] The decrease in resolution (softer) is analogous to the effect of lag in old analogue TV cameras. A moving object will be 'smeared out' because of the delay in building up the image on the camera and the rate the object travels across a given spot. The image on the back of the tube is not over the sensor element for long enough to register fully and the charge on the sensor takes time to decay so it leaves behind a trace of the object that passed. A stationary object will give a full resolution image and the resolution will get worse as the speed increases and more picture elements contain traces of the image moving across them. The acceptable angular speed will be inversely proportional to the decay time of the image on the sensor. It is due to the Convolution of the time sensitivity function and the time profile of the light (heat) landing on a spot. (Those of a nervous disposition can ignore this bit.) [/QUOTE]
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Astronomy and Cosmology
Astronomy and Astrophysics
Can you me with this Hershel telescope beam?
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