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Thanks for the suggestion and help. They only list long pass, but they also have dichroic. I would link to them, but i am not allowed until 20 posts :) I haven't found surplus on their site but I will contact them. The prices listed make me think that the slow boat from China or eastern...

That is such a weird response that itself took time. I always thought trolls spent time writing inflammatory things, but I am no expert. Answering where a good source of dichroic filters in the US takes a few seconds if someone knows. Suggesting better designs to accomplish the goal certainly...

I have a goal to create a laser that I can swap between different wavelengths, but will still line up more or less. I was hoping to see the difference in peaks distances when passed through a dual slit with different wavelengths. So like and RGB laser in many ways, but I am not trying to mix...