I had always assumed, (old saying about that last word),

by former hater of plastic, Tuesday, July 03, 2018, 09:03 (2272 days ago) @ ERSisk

that a dot sight projected an LED laser beam onto a lens.

Which is why I would query as to how just that light pipe would work, seeing as how it seems to be simply laying flat atop a low mount, a lens high above, nothing even angled towards lens, or visa versa.

What I do not know about such dot sights would fill volumes, including how they were able to appropriate the name "holographic" to shining a light on a window.


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