Signal to Noise Ratio Calculator

Signal to Noise Calculator

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Select detector
QE %		Exposure time,s
Pixels
Chip area mm
Pixel size µm
Single Pixel area µm²

		Single pixel Dynamic Range
Well capacity ke-		Signal e-/eff.pixel
Sensor temp C°-		S/N Ratio
Dark current e-/pixel/s		System gain e-/count
Readnoise e- rms		Expected counts*
Spherical photon flux	ph/s	Incident photons,ph/eff.pixel/s

Amplifier mode: Optimization of system performance for lowest noise or highest SNR. Binning factor: The number of pixels to be combined. Dark current: The charge accumulated within a well, in the absence of light. Exposure time: The length of time that a CCD/CMOS is accumulating charge. Read noise: Unwanted signal or disturbance that is generated by the on-chip amplifier Signal-to-noise ratio: The ratio of the measured signal to the overall noise at that pixel. Dynamic Range: Defined as the linear full well (e-) divided by read noise (e-). Spherical photon flux: The number of photons intercepted by a sphere per unit time. System gain: Relationship between the detected electrons and A/D units generated Excess noise: Statistical nature of the EMCCDs results in excess noise between 1 to 1,4. EM gain: Electrons are accelerated from pixel to pixel in the multiplication register. CMS: Correlated Multiple Sampling, a effective noise reduction technique. Note: * The actual values may be 50-100 counts higher because of the Baseline Offset. *Disclaimer:* all numbers presented in this calculator should be used purely for reference and comparison purposes only. We do not assume any liability for their accuracy.