IDAS LPS-D2 Ready

Now IDAS LPS-D2 48mm and 52mm are commercially available.

Here is the actual measured production data. I’m not sure other suppliers publish “measured production value”. As far as I saw, mostly “designed value”. The design value is the good hint of its filter performance. But that doesn’t describe the “actual performance” as the commercial unit we receive. So production value is much more important for us.

Sorry, this is a temporary image. Too many curves in one place. We are preparing for the special page for all 4 kinds of LPS filters which allows us to see each lamp emission separately without clicking. Please wait for that.

Following plots show how LPS-D2 works with high pressure mercury emission lines. It is not intended for thought, just for your info.

As shown above, D2 doesn’t block Mercury’s 436nm and 547nm lines. So if your sky is dominant by Mercury vapor, LPS-P2 and LPS-D1 are still good choice for you. Meanwhile your sky is heavily polluted by high/low sodium vapors at least in US, LPS-D2 should be perfect solution. I will test and show you soon. The filter choice depends on your sky condition. Anyway, our new page makes it to see easier.

In any case, IDAS LPS-D2 should be the 1st filter in our industry to be considered for the modern light pollution – white LED. I applause IDAS to prepare the future light pollution now as the market leader.