black or white lasers

[the laser man 2]

do lasers that have pitch black beam and dot exist (or lasers that have a white beam and dot)

 

[Sowee7]

do lasers that have pitch black beam and dot exist (or lasers that have a white beam and dot)

White lasers do exist, (RGB lasers and white ar-kr lasers) but a black one doesn't exist and never will

 

[steve001]

Excluding white lasers think through what is wrong with the idea of a black beam producing laser.

 

[julianthedragon]

The short answer is no (for black). But if the demand for a black laser must be satisfied, here are my ideas:

1) A non-visible wavelength laser would be indistinguishable from a black laser in a pitch dark room.

2) An "inverted laser". Basically a bright flashlight with an intentional negative space where the "beam" would be, or in other words a "collimated shadow", with white light enclosing a tight cylinder of darkness. Not entirely sure how this would be done optically if at all possible.

I'll see myself out