Pass Green Reflect Red dichroic mirror as an infrared filter

thebouljello said:

I want to make a rg yellow laser by combining 650 and 532nm beams with a pass green reflect red dichroic mirror. Can this mirror double as an ir filter for the 532nm laser or will the ir be reflected? Thanks.

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Trendkilla254 said:

Can you post links to what you bought? Which type of build were you planning. I am also interested in a similar build.

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thebouljello said:

RGB System Optics Reflect Red and Pass Green Laser Lens 15x15mm 1pcs | eBay I want to use the generic 5mw green and red laser pens. If I can, I also want to add a star cap to the yellow laser.

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diachi said:

You can add a star cap, but it'll split the green and red back into individual green and red beams.

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thebouljello said:

I wonder what it would look like. I have seen projectors with red and green lasers where the red and green are clearly split. In some of them, there are faint traces of yellow beams.

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diachi said:

Something like this:

May still be some hints of yellow, but the red and green will split apart - shorter wavelengths diffract less than longer wavelengths. To get a true yellow out of a diffraction grating (Star cap, same thing) you'd need to use a true yellow laser - not two lasers combined.

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