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BDi

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Another way of saying this is that the first dichro needs to pass A and reflect B, the second dichro needs to passs A+B and reflect C, the third dichro must pass A+B+C and reflect D, and that last poor dichro must pass all of A+B+C+D and reflect E. See how complicated it gets the more dichros you put into the system?
For sure! Gets very complex...

Maybe something simpler would be a better fit...
 

lasersbee

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:wave:Welcome to the Forum...
Looks like the members here have already
stepped in to help you.

Enjoy your stay...


Jerry
 

CurtisOliver

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As Paul has rightly stated, it gets more difficult when you add more dichros into the system. In other words it also gets more difficult when you add more wavelengths to the system. What you are essentially creating is a OTT and elaborate RGB system. Are you hoping for a white output?
 

BDi

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As Paul has rightly stated, it gets more difficult when you add more dichros into the system. In other words it also gets more difficult when you add more wavelengths to the system. What you are essentially creating is a OTT and elaborate RGB system. Are you hoping for a white output?
I'm not sure what the output wavelength colour would end up being as I thought it would ultimately be determined by the colours mixed along the beam and that in order for the laser to work, the colour mix would need to sequenced correctly to deliver the maximum output...
 

diachi

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I'm not sure what the output wavelength colour would end up being as I thought it would ultimately be determined by the colours mixed along the beam and that in order for the laser to work, the colour mix would need to sequenced correctly to deliver the maximum output...

Yeah, output colour would be determined by which wavelengths you pick and what powers they are at.

You'll need to figure out what wavelengths you want to use before you can proceed...
 

BDi

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Yeah, output colour would be determined by which wavelengths you pick and what powers they are at.

You'll need to figure out what wavelengths you want to use before you can proceed...
My other thought was building 2x 3 colours into 1 combined using diachroic and then combine the 2 beams generated into 1 beam using a cube...
 

Encap

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I have no idea, was hoping to get advice on best to use...
My other thought was building 2x 3 colours into 1 combined using diachroic and then combine the 2 beams generated into 1 beam using a cube...
To do what precisely? For what reason precisely, real world? Budget available? If you want help indicate same?

If you don't know what you are doing, why, or what you want to do, then why are you asking questions about an imaginary nothing--spinning everyone's wheels?

No input wavelengths stated , no output wavelength goal, no output power goal, no platform, hand held or lab optical table incicated???

Just daydreaming questions is not likely to be of any real help in any real world situation.
Why are you asking questions about an imaginary--spinning everyone's wheels?

No input wavelengths stated , no output wavelength goal, no output power goal, no platform, hand held or lab optical table incicated???

PS---Australian laser law considers anything over 1mW a dangerous weapon you need permission/permits for ownership and/or use and if you have any intention of ever using it outdoors, be advised that most States of Australia require a license or laser permit to operate handheld lasers in outdoor areas + safety and legal liability issues are involved & need to be addressed as well.

"In Western Australia, laser pointers of power output greater than 1mW should not be used or possessed by members of the general public. If you are uncertain of the power output of a laser pointer, please contact Radiation Health for assistance" ~ from: Radiological Council

It is an offence under the Western Australia Radiation Safety Act to manufacture, sell, possess or use a laser pointer with a classification exceeding Class 1or Class 2, meaning 1mW, as defined in Australian/New Zealand Standard 2211
For more on Western Australia laser laws see: WA Health - Public Health - Radiation standards and Codes of Practice
 
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BDi

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To do what precisely? For what reason precisely, real world? Budget available? If you want help indicate same?

If you doing nothing and don't know what you are doing, why, or what you want to do, then why are you asking questions about an imaginary nothing--spinning everyone's wheels?
Hi Encap, I appreciate your feedback.

To set you at ease, my goal is portable humane bird abatement, I have a budget and have not come here to waste peoples time. My own time is precious enough let alone that of others.

I am aware of laws & regulations within Australia and that isn't why I am here communicating with experts on laser construction.

I totally admit I don't have all the answers, or even questions in that respect and gaining expert advice and a proper solution fit is the exact reason I have joined this forum.
 

Encap

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Hi Encap, I appreciate your feedback.

To set you at ease, my goal is portable humane bird abatement, I have a budget and have not come here to waste peoples time. My own time is precious enough let alone that of others.

I am aware of laws & regulations within Australia and that isn't why I am here communicating with experts on laser construction.

I totally admit I don't have all the answers, or even questions in that respect and gaining expert advice and a proper solution fit is the exact reason I have joined this forum.
You might want to talk with professional in Australia to find out what works and is actually done, what laser and bird abatement in Australia is and how effective it is. There are many.
Chances of you designing, buliding, + , safely,effectively, and legally deploying a portable or even stationary system, unless you have alot of time and money to burn to reivent the wheel, are very slim. The big problem is not scaring away birds for a few minutes, it is that birds come back/return, so unless you want to stand there with a portable laser 24/7 to scare away birds, it is not going to go well. You need a sensor activated system that can target brids where they are and/or one that can scan over a large area repeatedly.

Good luck in you investigations of what might be able to be in your real world application. Best advice is to study what is avaiable already. There is little, if any chance, you can invent and build something as good or effective for lower cost. This application as been studied by professional is several fields involved for years and product exists.

ABC news article: Laser trialled to frighten birds from Adelaide Hills vineyard - ABC News (Australian Broadcasting Corporation)

Article: https://birdcontrolgroup.com/testimonial-adelaide-airport/

Product: Bird Gard Laser Gun | Bird Gard Pty. Ltd.

Company: Birds Off - Australia's Leading Bird Control Specialists

PS Green lasers seem to work but systems to scare birds are expensive see:
Bird Phazer lasers - JETLASERS.ORG

Distributor of CNI is AU: You can get a powerful 532nm green CNI laser from the distributor in Australia--maybe talk with them about lasers and bird abatement -- EFORCE LASERS

Manufacturer: CNI lasers China: Green laser, Blue laser, Infra Red laser, IR laser, UV DPSS laser.
 
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BDi

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Thanks for the advice Encap.

The issue with the Agrilaser-ish products is that their intention is to scare the flock or any birds in a given area.

My needs are to target a small group of ravens (5-9) when they are in a specific area used by an endangered species, so must be done by targeting each raven individually without disturbing any other birds.

This occurs mainly at sundown/ dusk as that's when the ravens attack or muscle these birds as they come in to rest for the night.

The birds I am trying to protect only exist in WA and are internationally classified as 'threatened with extinction' and can go into immense detail about this, but seeing this a forum for lasers, not conservation I won't bore anyone with details unless asked.

So am trying to find a solution that fits.
 

Encap

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Thanks for the advice Encap.

The issue with the Agrilaser-ish products is that their intention is to scare the flock or any birds in a given area.

My needs are to target a small group of ravens (5-9) when they are in a specific area used by an endangered species, so must be done by targeting each raven individually without disturbing any other birds.

This occurs mainly at sundown/ dusk as that's when the ravens attack or muscle these birds as they come in to rest for the night.

The birds I am trying to protect only exist in WA and are internationally classified as 'threatened with extinction' and can go into immense detail about this, but seeing this a forum for lasers, not conservation I won't bore anyone with details unless asked.

So am trying to find a solution that fits.
Sounds like a laser is not the most significant problem or cost you are going to encounter.
To identify and select a particular bird from amongst birds and just chase that bird away is going to be the challenge short of having a human trained, standing there doing that full time work.

You are going to need a computer controlled recongnition system that can discriminate birds types and target only ravens at whatever distance and then direct an automated laser & mount or several of them speciffically at the targeted raven/ravens.

Not practical or done for cost and technical reasons as far as I know---would be a very interesting thing to develop if it can be within reasonable expense--one thing is for sure at this point either way seems fraught with problems and solutions very expensive either initially or over time.
Does WA or whomever has the responsibility for the land and protecting these birds in that location have a budget to support such an R ,D ,T, and E effort in hopes of being successful?
 
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