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So you want your lens covered 99.9% of the time, just in case someone points a laser at it?
by bufferoverflow 7y ago
So you want your lens covered 99.9% of the time, just in case someone points a laser at it?
- Terr_ 7y agoWho says you're limited to one? For that matter, if you're just trying to find the direction of the beam, why bother with "good sensor" at all? Set up a bunch of not-quite-parallel tubes with simple and durable light-sensors in the "deep" end, and whichever sensor measures the highest must be pointed at the light-source.
- CharlesColeman 7y ago>> Sweep a physical occluder across the lens, measure abatement? > So you want your lens covered 99.9% of the time, just in case someone points a laser at it? Don't some missile seekers already work that way? https://www.ausairpower.net/TE-Sidewinder-94.html https://www.ausairpower.net/TE-Sidewinder-94.html: > The Sidewinder's seeker used an ingeniously clever optical arrangement, with a Cassegrainian mirror fitted with a tilted secondary mirror. The secondary mirror rotated in unison with a reticle, projecting the whole instantaneous field of view of the mirror through the reticle onto a filter/detector assembly. Because the mirror secondary was tilted, rotating it about the missile's axis swept the cone of the mirror's field of view about the missile's axis in a fashion analogous to a conical scanning radar seeker (see diagram).
- AWildC182 7y agoModern systems are Focal Plane Array which is aerospace speak for a typical camera.