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A comment on Reflected hidden faces in photographs revealed in pupil. Parent comment

Re:Reflected hidden faces in photographs revealed in pupil by kika on Friday December 27, 2013 @01:45PM (#6971975)
To get such less noise you not only need to utilize advanced materials, but also cool down the sensor considerably. To register single photon impacts you'll need to cool down to 0K I guess :-)
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Re:Reflected hidden faces in photographs revealed in pupil by hahainternet on Friday December 27, 2013 @02:07PM (#6972081)
Not at all, just look at the difference in the current sensors on the market. There's a wide range of performances due to engineering restrictions. Only the pixel size and aperture size are really relevant to diffraction so it occupies a different class of problems.
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Re:Reflected hidden faces in photographs revealed in pupil by Gravityloss on Friday December 27, 2013 @04:17PM (#6972656)
Even if you had 100% efficient sensors, photon shot noise would still be an issue. You are sampling the photons emitted by the target. After having reasonably efficient sensors, it's a baseline you can't go under.
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Re:Reflected hidden faces in photographs revealed in pupil by wlievens on Friday December 27, 2013 @05:29PM (#6972903)
I'm not sure about that minimum, but I do know noise (dark current signal non-uniformity for those in the know) increases considerably with temperature. So yes it matters.
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Re:Reflected hidden faces in photographs revealed in pupil by barrkel on Saturday December 28, 2013 @06:33AM (#6974755)
FWIW, the rods in your own eye's retina are able to register single photon impacts.
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