Cinema Camera Sensor Thermal Noise & Dark Current Calculator

Estimate your sensor's thermal behavior and signal-to-noise ratio degradation based on operating temperature and exposure parameters.

Input Parameters

25°C
1.0s
800
4.5µm

Dark Current

0.00

e⁻ / pixel / sec

Thermal Noise

0.00

RMS Electrons (e⁻)

Signal Integrity Analysis

Signal-to-Noise Impact Excellent
"Note: Thermal noise estimations assume typical CMOS architecture scaling. Actual performance varies by sensor design and dark frame subtraction efficacy."

How It's Calculated

Dark Current Modeling

The tool utilizes the Arrhenius equation model where dark current ($I_d$) roughly doubles for every 6-7°C increase in temperature. The formula is expressed as: I_d(T) = I_0 * 2^((T - T_ref) / 6.5). We use a baseline of 0.5 e⁻/px/s at 20°C as our reference point.

Noise Accumulation

Thermal noise is modeled as shot noise, calculated as the square root of the accumulated dark electrons over the exposure time: Noise_rms = sqrt(I_d * ExposureTime). This represents the statistical fluctuation in the electron count independent of incoming light.