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IgorT said:I just received a response from Meredith Instruments about their glass lens.
They say, that the Meredith glass lens has an MgF2 AR coating optimized for 655nm.
The 405nm custom lens will also have an MgF2 AR coating, but optimized for 405nm. It also consists of a glass material with which this type of coating works particularly well (refractive index of 1.9.. regular glass =1.5).
And since it is very similar to Meredith in all aspects, only a bit larger (with a higher NA as well), there is no reason it should not work just as well.
I hope i receive another comparative measurement (AixiZ acrylic & Meredith) soon, and we should know more then.
I'd say it's looking pretty good for now.
Is Meredith also going to be offering a custom AR coated glass lens for their housings as well then?