How suitable are 445nm laser diode based modules for lasershow use?

Hi,

How suitable/safe are the current M-140 type laser diodes for either as a standalone blue or the blue in an RGB Laser Projector.

The wavelength of 445nm is quite a long way from the lines of an Argon laser, & even further from the eyes peak response. (Argon lines were said to be 50% @ 514nm, 30% @ 488nm & 20% @ approx 440nm).

A document from laser visuals describes how green DPSS lasers can appear 3 to 4 times as 'bright' as an argon laser of the same power.

The thing it said that made me take note was that the minor 440nm argon line 'is barely visible to the human eye'.

Which maks me think that lasers at this wavelength may not be ideal for lasershow use?

Or if they are used, are there any special considerations to be observed?

Thanks,

Simon B.

Many folks here use the *140 445nm diode lasers in their projectors. These are typically used with correction optics and are approximately 1:1 power ratio with 532nm to achieve a balance.

I'm surprised by your question as there is so much information here about these diodes and their use in projectors. In fact the Admin had to create a whole section of the forum for it when the news broke!

they're quite suitable.... especially when you combine 10 into a single beam.

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Originally Posted by simonb

Hi,

How suitable/safe are the current M-140 type laser diodes for either as a standalone blue or the blue in an RGB Laser Projector.

The wavelength of 445nm is quite a long way from the lines of an Argon laser, & even further from the eyes peak response. (Argon lines were said to be 50% @ 514nm, 30% @ 488nm & 20% @ approx 440nm).

A document from laser visuals describes how green DPSS lasers can appear 3 to 4 times as 'bright' as an argon laser of the same power.

The thing it said that made me take note was that the minor 440nm argon line 'is barely visible to the human eye'.

Which maks me think that lasers at this wavelength may not be ideal for lasershow use?

Or if they are used, are there any special considerations to be observed?

Thanks,

Simon B.

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You'll shoot your eye out kid ! :cool: