Hey guys, I recently bought a green laser, a 150mw 520nm version. The beam is strong and powerful. However, whenever i shine the dot at a white wall, i will get something like this. The rectangle is not as bright as the dot, but it is noticable and really makes me annoyed. Its not the problem with the focusing ring, as the rectangle stays in the same position even when i turn the ring. However, it does change position when i rotate the whole laser, which makes me suspect its a diode issue. Anyone has any idea? Appreciate all help! Btw, greetings from Singapore!
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