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200mW Red laser reflection into itself...?

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RedDart

RedDart

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Well I was playing with my 200mW red laser and I basically let the laser's reflection hit my laser...

Anyways now the red dot is really weak (barely visible) and it's long and wide. (not circular)... I'm guessing I destroyed the diode by reflecting it into itself?

Here's a small diagram if you don't understand (pro paint skillz)

Is there a way to fix this, or do I need a new diode?

14wyf6q.png
 
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RedDart said:
Well I was playing with my 200mW red laser and I basically let the laser's reflection hit my laser...

Anyways now the red dot is really weak (barely visible) and it's long and wide. (not circular)... I'm guessing I destroyed the diode by reflecting it into itself?

Here's a small diagram if you don't understand (pro paint skillz)

Is there a way to fix this, or do I need a new diode?

14wyf6q.png
Click to expand...

I melt my acrylic lens in this form; if your lens is the plastic one probably that is your problem.
 
RedDart said:
Hmm what's a viable solution?
Click to expand...

First you need to check if your lens is the glass or acrylic one. If your lens is the glass one that is not your problem probably is your diode but if your lens is the acrylic one try to buy a new one in glass with the blue coating to replace it.
You will need to post pictures if you want more help.:yh:
 
Hate to say this but regardless of the issue thanks for pointing out that this can happen:eek:
 
What? There is no way you're going to melt a lens with a laser this low powered, not even a 1W 445nm laser will melt an acrylic lens, it's the black plastic ring _AROUND_ the lens that melts.

You have killed the diode by destroying it's coatings, you basically elongated the cavity, and the power density became high enough to damage it's coatings, the diode is toast.
 
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Thanks for clearing that up Things. I was trying to figure this out and I couldn't. I have alot of units in this price range that I would think have the acrylic lens. Couldn't find anything to back up the original post. Didn't make sense to me either. I believe it has been posted quite a few times that the 1W Spartan doesn't have a glass lens (I do own a spartan and have a glass lens that could be put in it but I'm too edgy about doing it myself). Can't seem to find an absolute definitive answer on the Spartan lens.
 
It's not the lens, but fyi, replacing the lens in that laser takes literally two seconds, unless they epoxied it in.
 
The diode is toasted. The laser beam hits back at the aperture and through the lens again. All the energy is concentrated at the tiny point which is the laser cavity.
 
Things said:
What? There is no way you're going to melt a lens with a laser this low powered, not even a 1W 445nm laser will melt an acrylic lens, it's the black plastic ring _AROUND_ the lens that melts.

You have killed the diode by destroying it's coatings, you basically elongated the cavity, and the power density became high enough to damage it's coatings, the diode is toast.
Click to expand...

My fist laser was a BOBLASER 1W 445nm water proof. I burn my glass lens in this form pointing to a mirror. The problem with the melted lens was: less output and the dot change in an unusual form , fixed with a new lens.
 
Change the diode if you can or buy a new laser. There is no fix for your laser.
 
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