Well Finally , I received my Dichro for combining red and green. So here is a Mini review to explain exactly what it is and how it works.
It is a small piece of optical glass , that will transmit a certain wavelength of light, yet reflect another. It is a key component in all pro laser scanners, to take 2 beams of different colours to mix and make another colour.
Typically there are 2 different types of Dichros commonly used for visual lasers. The first and most common is the dichro used to combine red and green to make yellow, and the second is the dichro that can use blue laser light to produce the 7 major colours, or even White light (when used in combination with the first Dichro)
I recently purchased a red / Green Dichro from Ebay and in theory can reproduce any colour in between 650nm - 532nm (red, Orange, yellow and green) .
Once the colours are mixed its important to know that it looses a quality that makes it a laser beam. that is coherence , (it will always be a mix of 2 colours and not a new colour).
The red / Green Dichro works like this: The glass will transmit the green while reflecting the red, so with careful positioning of the lens and both lasers, it is possible to simulate both beams coming from the same origin.
here is a schematic to explain what I mean.
This will be a multi post topic, so stay tuned
Jason.
It is a small piece of optical glass , that will transmit a certain wavelength of light, yet reflect another. It is a key component in all pro laser scanners, to take 2 beams of different colours to mix and make another colour.
Typically there are 2 different types of Dichros commonly used for visual lasers. The first and most common is the dichro used to combine red and green to make yellow, and the second is the dichro that can use blue laser light to produce the 7 major colours, or even White light (when used in combination with the first Dichro)
I recently purchased a red / Green Dichro from Ebay and in theory can reproduce any colour in between 650nm - 532nm (red, Orange, yellow and green) .
Once the colours are mixed its important to know that it looses a quality that makes it a laser beam. that is coherence , (it will always be a mix of 2 colours and not a new colour).
The red / Green Dichro works like this: The glass will transmit the green while reflecting the red, so with careful positioning of the lens and both lasers, it is possible to simulate both beams coming from the same origin.
here is a schematic to explain what I mean.
This will be a multi post topic, so stay tuned
Jason.
It would appear that especially when trying to scan a mixed beam, any tiny error in allignement becomes very apparant. I think I need an optics table as opposed to balancing the lasers and optics on books and padding :-[.
