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Old 08-07-2013, 04:11 PM #1
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Default Multi Mode lasers

Hey guys, I want to ask a very noob question.

"How does multi-mode lasers pointers work?"

By multi-mode I mean, High power, Low power, Strobe, SOS, etc..

Also, I want to ask that:

How is the modes controlled? Through the driver or through the switch circuit?

Is all drivers and diodes compatible with multiple modes?

Thanks,
Dragonizer



Last edited by dragonizer; 08-07-2013 at 04:12 PM.
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Old 08-08-2013, 03:28 AM #2
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Default Re: Multi Mode lasers

Google PWM.
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Old 08-08-2013, 03:59 PM #3
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Default Re: Multi Mode lasers

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Originally Posted by Cyparagon View Post
Google PWM.
PWM as in Pulse-Width Modulation? If so, I still don't get how these multiple modes work. Thanks for your response though.
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Old 08-08-2013, 04:15 PM #4
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Default Re: Multi Mode lasers

Using PWM, you can blink a laser (including blink patterns), set it to low or high power, etc.

For example, PWM for 50% power would be blinking the laser on and off VERY rapidly at a 50% duty cycle.

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Old 08-08-2013, 04:40 PM #5
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Default Re: Multi Mode lasers

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Originally Posted by Trevor View Post
Using PWM, you can blink a laser (including blink patterns), set it to low or high power, etc.

For example, PWM for 50% power would be blinking the laser on and off VERY rapidly at a 50% duty cycle.

Trevor
Now I get the LOW power and HIGH power part.

But, I still want to ask:

Where is the PWM circuit situated? Near the switch or at the driver??

And, the high and low power is due to the duty cycle, how about the strobe/SOS mode? The strobe is just that the frequency is lower?

Thanks
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Old 08-08-2013, 04:43 PM #6
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Default Re: Multi Mode lasers

The modulation would be in the driver.

For the other modes, if the laser diode can be cycled on and off at 1kHz+, then cycling it at 10Hz or lower is no problem...

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Old 08-08-2013, 04:49 PM #7
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Default Re: Multi Mode lasers

Now I get it. Thank you very much.

+Rep

THANKS!!
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