Cadmium Posted June 9, 2021 Share Posted June 9, 2021 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 to evaluate how much red comes through with thinner stacks. Link to comment
dabateman Posted June 9, 2021 Share Posted June 9, 2021 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. Link to comment
Andrea B. Posted June 11, 2021 Share Posted June 11, 2021 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?) Link to comment
Andy Perrin Posted June 11, 2021 Share Posted June 11, 2021 Andrea, it's practically opaque in the 500-600nm range, so they probably rounded transmittance to zero (it may have been unmeasurably small). Link to comment
dabateman Posted June 11, 2021 Share Posted June 11, 2021 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. Link to comment
Cadmium Posted June 12, 2021 Author Share Posted June 12, 2021 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). Link to comment
dabateman Posted June 12, 2021 Share Posted June 12, 2021 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.com/transmission-simulation-software-hoya-color-filter-simulator/ Link to comment
Cadmium Posted June 13, 2021 Author Share Posted June 13, 2021 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. Link to comment
dabateman Posted June 13, 2021 Share Posted June 13, 2021 Where are you finding this sheet?All I see from official websites is 0.0 Link to comment
Cadmium Posted June 13, 2021 Author Share Posted June 13, 2021 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.com/colored-glass-filters/ultraviolet-transmitting-visible-absorbing-filters-u/ https://hoyaoptics.com/colored-glass-filters/ Link to comment
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now