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Old 12-18-2010, 04:05 AM #1
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Default Blue lasers can cause cancer?

This is probably one of the stupidest newbiest questions, but do or can blue lasers cause cancer? Somehow I read (or misread) somewhere some time ago along these lines in regards to "touching" the blue laser with hands. How does this apply to a 1W? : o

EDIT: Just exactly how awfully dangerous is a 1W 445nm laser?



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Old 12-18-2010, 04:25 AM #2
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Default Re: Blue lasers can cause cancer?

It's approaching (or is) ionizing radiation. The simple answer: yes, in large enough amounts.

Personally, I'd be more concerned for my eyes.

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Old 12-18-2010, 12:16 PM #3
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Default Re: Blue lasers can cause cancer?

Quote:
Originally Posted by BlueToast View Post
This is probably one of the stupidest newbiest questions,
There are no stupid questions regarding laser safety, only stupid answers.
Quote:
Originally Posted by BlueToast View Post
EDIT: Just exactly how awfully dangerous is a 1W 445nm laser?
It's pretty dangerous alright. It effortlessly pokes tiny holes through many a thing,
living tissue (your skin, retinas...) included.
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Old 12-18-2010, 12:24 PM #4
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Default Re: Blue lasers can cause cancer?

There are many ways to get cancer. If you care about your eyes, I won´t risk it with the 445nm laser. There are better options around nowadays. I´m sure the results are going to make you happy.
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Old 12-18-2010, 01:52 PM #5
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Default Re: Blue lasers can cause cancer?

Adding to the original question, is 405 worse than 445 biochemically?
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Old 12-18-2010, 02:18 PM #6
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Default Re: Blue lasers can cause cancer?

This item had been discussed before at here,
blue light hazard

More information.
UW EH&S Hazards of Ultraviolet Light
Black light - Wikipedia, the free encyclopedia
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Old 12-18-2010, 02:31 PM #7
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Default Re: Blue lasers can cause cancer?

Blue Lasers at the 445nm wavelength cannot cause cancer, nor can Blu-Ray lasers at the 405nm wavelength.

They are not even UVA.

Eye damage is a whole different story though.
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Old 12-18-2010, 03:11 PM #8
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Default Re: Blue lasers can cause cancer?

I was referring to the photocell bleaching and unbleaching process. Only UVB and UVC can cause cancer, and UVC is near impossible to be exposed to.
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Old 12-18-2010, 06:11 PM #9
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Default Re: Blue lasers can cause cancer?

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I was referring to the photocell bleaching and unbleaching process. Only UVB and UVC can cause cancer, and UVC is near impossible to be exposed to.
I know, you said "biochemically".


Lasers at 405nm~445nm cannot cause cancer.
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Old 12-18-2010, 07:19 PM #10
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Default Re: Blue lasers can cause cancer?

According to what I've read, these wavelengths aren't mutagenic/carcinogenic like UVA-C, but damage to tissue can cause some forms of cancer.
Exposing skin to high intensity light (445nm and 405nm lasers included) can cause cell damage/death and release excessive amounts of free radicals which can cause melanoma.

So yes, there is a possibility.
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Old 12-18-2010, 07:33 PM #11
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Default Re: Blue lasers can cause cancer?

@RA_Pierce Im not sure but I think this applies to all lasers. 405 and 445 just have more energy per photon so it will occur more quickly.
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Old 12-18-2010, 11:12 PM #12
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Default Re: Blue lasers can cause cancer?

If you're burning your skin intentionally with a laser, you'll get no sympathy from me if you get cancer.
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Old 12-18-2010, 11:19 PM #13
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Default Re: Blue lasers can cause cancer?

Ok, I asked my dermatologist and he said light in to 400-500nm range can cause melanoma.
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Old 12-19-2010, 03:37 PM #14
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Default Re: Blue lasers can cause cancer?

I guess you better stay inside with the lights off for the rest of your life, because all white light has those components.

Also... what self-respecting male has a dermatologist?
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Old 12-19-2010, 03:49 PM #15
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Default Re: Blue lasers can cause cancer?

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Ok, I asked my dermatologist and he said light in to 400-500nm range can cause melanoma.
He/She must be quite dumb since the main danger lies in the UV spectrum (300nm<).
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Old 12-19-2010, 04:01 PM #16
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Default Re: Blue lasers can cause cancer?

Remember this is 1 Watt of blue light in a few square mm of area. Even though you're exposed to 445nm, and the entire visible spectrum and beyond every day, it never get close to this extreme. But I have no clue if it actually cause cancer, I'd really like to know from a reliable source. But I'm not taking chances in the meantime.
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Last edited by FireMyLaser; 12-19-2010 at 04:03 PM.
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