Post #2594063

2026-05-12 23:21 UTC

Oh cool So if you had a camera with mirror would it still go a bit through the enclosure and hit the sensor? What if the sensor is flipped so it has to go through the silicon substrate before hitting the sensitive bits, would it be equally noisy but less noisy overall?

Replies (1)

@Redjard@reddthat.com 2026-05-12 23:31

Yes. Silicon substrate is too thin to matter. Redirecting with mirrors is probably gonna make it worse. Your housing would need over a cm of solid plastic to block beta radiation. On a dedicated camera you might have a sizeable lens with many lenses totalling a cm of shielding, but redirect the light and place the sensor not behind the lens and you only have that camera housing. Realistically though you have a smartphone, and that β-radiation will probably make it most of the way through the entire thing. And the gamma radiation really won't care, even if you have a 50cm long zoom lens right between the sensor and source. This is where you might want a lead brick wall, 10cm thick should make it short-term safe for ⁶⁰Co. Edit: forgot this was in general, not about the β

Open ##2594070