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Old 10-17-2012, 05:33 AM #1
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Default Bad beam patterens

I seem to have a 445 with a screwed up beam, I'm betting one or more of the dies is defective and right out of the projector

Has any one see this pattern before ?
it is being driven with 1400mA and is only putting out 140mW




here is a diode that puts out plenty of power and seems to have a normal pattern, this one is being driven with 1400mA and is putting out 1800mW.
The black spot is dirt on the lens.


Thanks for looking


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Last edited by Flaminpyro; 10-17-2012 at 05:37 AM.
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Old 10-17-2012, 05:34 AM #2
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Default Re: Bad beam patterens

Yup. Seems very familiar to me - I've killed my fair share of 445s. That's a common zombie output - usually, it's the central modes that go first.
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Old 10-17-2012, 07:30 AM #3
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Default Re: Bad beam patterens

This is my first one, I have killed a few 445's and zombie'd a couple 405's but this is my first zombie 445.
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Old 10-17-2012, 09:56 AM #4
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Default Re: Bad beam patterens

Yuppers.... I've blown few multi-line LDs myself that were
quite a bit more expensive than a 445nm LD. Ouch !!

Mine still Lase but only the lines that have not been damaged.
Hence the low output.

The quickest clue is the low output power compared to the
high input current.


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Last edited by lasersbee; 10-17-2012 at 10:00 AM.
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Old 10-17-2012, 01:40 PM #5
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Default Re: Bad beam patterens

you need to press your dioded in with Flaminpyro's diode press

Quote:
Originally Posted by Flaminpyro View Post
I seem to have a 445 with a screwed up beam, I'm betting one or more of the dies is defective and right out of the projector

Has any one see this pattern before ?
it is being driven with 1400mA and is only putting out 140mW




here is a diode that puts out plenty of power and seems to have a normal pattern, this one is being driven with 1400mA and is putting out 1800mW.
The black spot is dirt on the lens.


Thanks for looking
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Old 10-17-2012, 01:55 PM #6
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Default Re: Bad beam patterens

That looks EXACTLY like the patten on my Mitsubishi ML501P73. Same symptoms, it's drawing 1.4 amps and is putting put 4mW according to my LPM.
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Old 10-17-2012, 04:05 PM #7
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Default Re: Bad beam patterens

Quote:
Originally Posted by AUS View Post
That looks EXACTLY like the patten on my Mitsubishi ML501P73. Same symptoms, it's drawing 1.4 amps and is putting put 4mW according to my LPM.
yours should be a LED type beam. May you post a picture?
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Old 10-22-2012, 10:11 AM #8
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Default Re: Bad beam patterens

Sorry had a big weekend and was in Sydney most of last week.

Here you go. Hard to take a good pic of it....

EDIT! WOAH!!! Re sizing pics!



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445nm 750mW Ultrafire W501B
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Last edited by AUS; 10-22-2012 at 10:15 AM.
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Old 10-22-2012, 01:53 PM #9
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Default Re: Bad beam patterens

Yeah my A140 did that, lasted a year then wend downhill fast.
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