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U-330 stacks/graphs

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#1 Cadmium

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Posted 09 June 2021 - 02:42

I made this comparison graph today of various U-330 (Hoya equivalent of UG5) stacked with various S8612 thicknesses.
(note the Hoya data drop out in the 500nm/600nm range)
The usual standard being U-330 1.5mm + S8612 2mm, and the redder version being U-330 1mm + S8612 1mm.
Mostly top evaluate how much red come through with thinner stacks.
Attached Image: U-330_S8612_thin.jpg

Edited by Cadmium, 09 June 2021 - 02:46.


#2 dabateman

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Posted 09 June 2021 - 12:51

The U330 glass and maybe even the Ug1/U360 are the type I think you can get away with just BG39 and not need S8612 to block the IR.


#3 Andrea B.

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Posted 11 June 2021 - 20:25

I wonder why the Hoya data is missing for the 500-600 nm range?

Cadmium, do you have a set of these for UG5 also? For comparison.
(Or we might have a set posted somewhere?)
Andrea G. Blum
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#4 Andy Perrin

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Posted 11 June 2021 - 21:42

Andrea, it's practically opaque in the 500-600nm range, so they probably rounded transmittance to zero (it may have been unmeasurably small).

#5 dabateman

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Posted 11 June 2021 - 22:54

Andy I don't think so. There seems to be a small bump at 580nm with my filter. I think they are just lazy. Just mentally connect the curves there is data there. Or just use the UG5 to fill in the blank.

#6 Cadmium

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Posted 12 June 2021 - 06:44

Andrea, Actually moments ago I went to get the link to Hoya U-330 data sheet, and it appears for the first time to me that they have updated their U-330 data to include the full visual range,
so I can now update that range in the Schott program to print our more inclusive U-330 graphs. Good! I have not checked the other Hoya U glass data yet, they may have updated the data for all their U glass.

As far as UG5, it works the same as U-330. Here is basically the same plots using Schott UG5 instead of Hoya U-330. I suggest using U-330 for price.
Someone wanted the comparison (showing more and more red included).

Attached Image: UG5_S8612_thin_dia.jpg

#7 dabateman

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Posted 12 June 2021 - 09:07

Cadmium it just lists 0 for October 2020 catalog. So not much difference.
Is the software better? I see it too was updated on October 29, 2020.
https://hoyaoptics.c...lter-simulator/

#8 Cadmium

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Posted 13 June 2021 - 06:20

A "0" data is what makes a 'data dropout' in the Schott program. If you put a "0" in it, then you get nothing, the plot drops to nothing, like the top graphs I posted here.
I think they were using "0" as an easy way to mean, "lower than you need to know", which may be true for some people, but not for us, or me.
I looked at U-340 which still has some "0" data, but the U-330 looks like it has been fully updated to show the entire visual range in real data.
Last I tried it, Hoya's program is lame in different instances, mostly based on the data they put in it, some of the data works, but not all of it, I don't know if they have updated it.

#9 dabateman

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Posted 13 June 2021 - 06:28

Where are you finding this sheet?
All I see from official websites is 0.0

#10 Cadmium

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Posted 13 June 2021 - 08:36

View Postdabateman, on 13 June 2021 - 06:28, said:

Where are you finding this sheet?
All I see from official websites is 0.0

Oops! I guess you are right, I thought I saw the U-330 had been updated, but nope. Sorry for my mistake.

https://hoyaoptics.c...bing-filters-u/

https://hoyaoptics.c...-glass-filters/