Where to buy Hoya and Schott special UV/IR filters?

[JCDowdy]

I checked with my longtime technical filter supplier and he responded that he made lots of filters for photography applications and was open to inquiries.

Optical Instrument Laboratories out of Houston TX.

[Akira]

I bought my U360 directly from Kenko optics (current Kenko):

 

https://www.kenko-tokina.co.jp/io-filters/filters/color-compensating-filter.html

 

and Schott BG40 from Shibuya Kogaku:

 

https://www.shibuya-opt.co.jp/ColorGlassFilter04.html

 

Both in 52mm filter rings.  Shibuya Kogaku offers Shott UG series filters as well.

 

I can ask them if they take orders from abroad.

[Doug A]

@Akirathis is excellent news. Please ask Shibuya Kogaku if they accept orders outside Japan.

Thank you,

Doug A

[Akira]

On 4/26/2023 at 4:01 PM, Doug A said:

@Akirathis is excellent news. Please ask Shibuya Kogaku if they accept orders outside Japan.

Thank you,

Doug A

 

Just called Shibuya Kogaku and confirmed that they take orders from abroad.  They handles Schott, Hoya and Chinese filter glasses and they will mount them in filter rings.

 

Their website has the English section:

 

https://www.shibuya-opt.co.jp/eng/index.html

 

and here you can search for various color (UV-pass, IR-pass and BG) filters of three brands mentioned above:

 

https://www.shibuya-opt.co.jp/eng/ColorGlassFilter_top.html

 

and here is the form for inquiries.  You can fill the form in English:

 

https://www.shibuya-opt.co.jp/eng/form/index.php

 

You can pay for the items via PayPal.

 

FWIW, we are getting into so-called "Golden Week" until 7th of May which is a series of national holidays.  So, please bare in mind that their responses to your inquiries would be slow.

 

Hope this would be of any help.

[Doug A]

13 hours ago, Akira said:

 

Just called Shibuya Kogaku and confirmed that they take orders from abroad.  They handles Schott, Hoya and Chinese filter glasses and they will mount them in filter rings.

 

Their website has the English section:

 

https://www.shibuya-opt.co.jp/eng/index.html

 

and here you can search for various color (UV-pass, IR-pass and BG) filters of three brands mentioned above:

 

https://www.shibuya-opt.co.jp/eng/ColorGlassFilter_top.html

 

and here is the form for inquiries.  You can fill the form in English:

 

https://www.shibuya-opt.co.jp/eng/form/index.php

 

You can pay for the items via PayPal.

 

FWIW, we are getting into so-called "Golden Week" until 7th of May which is a series of national holidays.  So, please bare in mind that their responses to your inquiries would be slow.

 

Hope this would be of any help.

Excellent news! Thanks for all the effort you put into this. The links are much appreciated.

Thanks again,

Doug A

[rfcurry]

I  have always liked the Schott S8612. I used that glass on some of my early UV bandpass filters. However, when Schott raised the price and availability dropped, I began requesting custom melts from other foundries. 
I was pleased with the melt I call the NIRBlock in 3mm thickness. Ulf has a point regarding the NIR blocking of the glass - it blocks well enough, but it doesn't start as soon as the S8612. See, below, the diabatic showing Ulf's data of the NIRBlock and Schott's data of the S8612.
 

Even my CuRB (4mm) filter doesn't start the NIR blocking as quickly as the S8612 (see below):
 

Theoretically, if I increase the thickness of CuSO4 to 6mm, the right leg of the CuRB syncs with the S8612 (see below):

 

Of course, Beer-Lambert is not perfect in this regard, as plain distilled water also cuts NIR. Some do sell water filters for NIR blocking, but they are absurdly long (thick).
Just some thoughts.
Regards,

Reed

UVROptics.com

[lukaszgryglicki]

From this, CuRB 6mm is the best option IMHO.

Do you know the exact transmission (like a table) for CuRB in 290-340nm range (UV-B rangne, which I'm mostly interested i recently)?

The biggest issue with all IR blockers is that they also block UV-B (quite heavy) and UV-C totally :-(