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MxwllsPersuasns

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Now I just need some help finding that distance. I was looking on the schematic diagram for our laser diode and wanted to determine that distance. I imagined the distance from the "image" to the lens for a laser (as opposed to a camera) would be from the point of emission of the laser to the lens. I've attached a picture of this schematic, if anyone can help me find the distance σ I would truly appreciate it.

** The little distance indicator that I drew in pencil on the diagram is where I believed the distance σ would be. But there's no way to determine this distance from the info given.