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what kind of laser is used in laser printers? Answered

what kind of laser is used in laser printers?




6 years ago

There is more energy in blue light then IR, but the photo emissivity of the
semiconducting drum as orksecurity pointed out will probably make the
laser color selection for a printer and this is importan......... Oh No you
don't give best answer to we who answer you. 


I'm not playing the best-answer game very seriously. If folks say thanks by marking best answer that's appreciated -- I'd sorta like to come up to 8% -- but after all these years I've stopped expecting users of teh interwebz to express appreciation. Nice when it happens, and makes me more likely to make an effort to help them in the future, but... I have more important things to spend energy on than stressing over missing couth.

Yeh me too - I have been stuck on 7% for ages (not that I look) - I guess the more questions you answer the lower the %.

If you really want to play the best-answer game, remember that responses to answers can't be selected as best answer; only top-level answers can be selected... so if you're saying something that you think might be picked, you may want to post it as a separate answer thread.

Annoying historical quirk in the software, which I'bles doesn't seem inclined to change.

Porkypine: "Such is life: A darksome vision, dimly seen as in a rear-view mirror."
Albert: "If that's advice, you can sort it out for yourself."

I'm only 13% of your 7% maybe after a few more.....

Low power laser diode. Unable to give a part number. i doubt your going to make a burning laser with it or get it to focus on anything further away than the laser drum was when it was working.

Not certain -- but it's nothing very special.

A laser printer is basically a photocopier. Charge is sprayed onto a semiconducting drum, and the laser is used to selectively cause areas to conduct and thus lose their charge. The charge is then used to attract toner, which is then transferred to the paper. Finally, a fuser unit melts the toner onto the paper so it doesn't just blow away again.

It doesn't take much light to activate the semiconductor. Lasers are used because they can be focused on a precise point, not for power.

(Putting it another way: the laser that excites electrons may not excite you.)