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Thread: CNI 400mw 808 nm Laser pointer - dissapointed

  1. #1
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    Default CNI 400mw 808 nm Laser pointer - dissapointed

    OK I have been waiting for these for some time.

    2 x 500 mw 808 nm laser pointers from CNI. They turned up at a friends house today, and our first results are very dissapointing. I think someone here has had the 1064nm version and reported it very impressive (it could have been Spec).

    These units seem initally impressive, being able to ignite a chequebook within seconds. BUT the beam divergence is shocking, at 4 metres the beam is about 15cm wide (it starts out at 1mm) !! Focus has no effect.

    I think that collimating these "lasers" is impossible because of the large apature laser "pump" diode installed. These are more like big IR torches, and I belive should not be labled "laser pointers".

    We have emailed CNI, I will let you know the result.

    Regards

    Gold

  2. #2
    Gabriel Guest

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    Not liking that divergence! Might be true that after pumping, the beam would be more collimated? Maybe...

    Just a thought,
    ~Gabriel

  3. #3
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    By the way Gabriel are you sure you signature is big enough on CPF ?

    There are still 6 pixels available on the right

    Gold

  4. #4
    Gabriel Guest

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    I dunno man, I mean.. I was thinking of just making it into a gif that exponentionally increases in size until it EXPLODES out of your screen.

    ~Gabriel

    P.S: Get your butt on MSN

  5. #5
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    A message from my friend

    I've spoken to CNI, and clarified the situation. The 808nM "pointer" can't be collimated because it uses a large area emitter (much as I guessed, but would be a good idea to say so on the website wouldn't it) They don't seem to know what maximum level is possible when collimation is required.

    So I asked about 1064nM, and the situation here is quite different. They can do 100mW (collimated) in a standard pointer package, which I suppose would be good for popping balloons. The bloke I was speaking to was not great at English (better than my Chinese), but I think he said that 200mW is also possible. Then he said they can also do a 300mW version, but I think that is in a different package style and probably costs more. I've requested details and will let you know.

    Regards

    Gold

  6. #6
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    Gold...
    Maybe not collimated but, at least focusable.
    That would make it useful to some degree...(Ballon Popper)

    you can still excite different types of materials (crystal types I hope)
    and see what happends , but ...please be careful.
    "My signature has been taken, so Insert another here"
    http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
    *^_^* aka PhiloUHF

  7. #7
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    They are now on the way back to China, and 2 * 1064nm on the way.

    I will let you know how they turn out.

    Regards

    Gold

  8. #8
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    I think you will like those better IMHO...

    :arrow: >>>>>>>>>>>>>>>>>>>>>>>>> :twisted:
    "My signature has been taken, so Insert another here"
    http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
    *^_^* aka PhiloUHF

  9. #9
    Join Date
    Feb 2005
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    I see that there is a big thread on this on CPF.

    Yes these "poniters" do burn, but then so does my magnifying glass. In my opinion these are no more better than holding a big IR pump LED in front of a lens.

    AVOID, unless suitable for your project.

    Gold

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