Big diameter filters for illumination wavelength range selection?

[Guenter Giese]

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Dear list members,


is anybody aware of a source / vendor of big diameter filters for
illumination wavelength range selection?

I think of something like the old-fashioned Wratten gelatine filters,
but with a more pronounced wavelength range selection (bandpass preferred).
Diameter:5 to 10 cm, or bigger.
Filters may be based on glass or gelatine or some other substrate.

Thank you in advance,

Guenter

--

------------------------------------------
Dr. Guenter Giese
Light Microscopy Facility Manager
Dept. of Biomedical Optics
MPI fuer Medizinische Forschung Jahnstr. 29
D-69120 Heidelberg, Germany
Phone [phone] (Fax: -325)
e-mail: [hidden email]

[Martin Wessendorf-2]

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Dear Dr. Giese--

Check with Chroma Technologies.  They certainly can custom-make almost
anything you want.  For colored glass long-pass filters, check Schott--I
think they can make glass sheets of arbitrary sizes.

Good luck!

Martin Wessendorf




On 6/21/2016 9:51 AM, Guenter Giese wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Dear list members,
>
>
> is anybody aware of a source / vendor of big diameter filters for
> illumination wavelength range selection?
>
> I think of something like the old-fashioned Wratten gelatine filters,
> but with a more pronounced wavelength range selection (bandpass
> preferred).
> Diameter:5 to 10 cm, or bigger.
> Filters may be based on glass or gelatine or some other substrate.
>
> Thank you in advance,
>
> Guenter
>

--
Martin Wessendorf, Ph.D.                   office: [phone]
Assoc Prof, Dept Neuroscience                 lab: [phone]
University of Minnesota             Preferred FAX: [phone]
6-145 Jackson Hall, 321 Church St. SE    Dept Fax: [phone]
Minneapolis, MN  55455                    e-mail: [hidden email]

[Craig Brideau]

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If your requirements are modest, your best price/performance tradeoff for
large filters is probably Schott filter glass as Martin suggests. For large
filters, interference filters will be very expensive compared to the
absorptive glass types.

Craig
On Jun 21, 2016 9:31 AM, "Martin Wessendorf" <[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Dear Dr. Giese--
>
> Check with Chroma Technologies.  They certainly can custom-make almost
> anything you want.  For colored glass long-pass filters, check Schott--I
> think they can make glass sheets of arbitrary sizes.
>
> Good luck!
>
> Martin Wessendorf
>
>
>
>
> On 6/21/2016 9:51 AM, Guenter Giese wrote:
>
>> *****
>> To join, leave or search the confocal microscopy listserv, go to:
>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
>> Post images on http://www.imgur.com and include the link in your posting.
>> *****
>>
>> Dear list members,
>>
>>
>> is anybody aware of a source / vendor of big diameter filters for
>> illumination wavelength range selection?
>>
>> I think of something like the old-fashioned Wratten gelatine filters, but
>> with a more pronounced wavelength range selection (bandpass preferred).
>> Diameter:5 to 10 cm, or bigger.
>> Filters may be based on glass or gelatine or some other substrate.
>>
>> Thank you in advance,
>>
>> Guenter
>>
>>
> --
> Martin Wessendorf, Ph.D.                   office: [phone]
> Assoc Prof, Dept Neuroscience                 lab: [phone]
> University of Minnesota             Preferred FAX: [phone]
> 6-145 Jackson Hall, 321 Church St. SE    Dept Fax: [phone]
> Minneapolis, MN  55455                    e-mail: [hidden email]
>

[George McNamara]

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Hi Guenter,

Newport web page has (specifications table near bottom of page):

Standard sizes ... 6.500" sq.

which would be 16.51 x 16.51 cm

Uses, "optical thin-film coating technology" -- aka interference
filters. See the web page for information on angle of incidence.

Newport Franklin has more stuff,
http://www.newportfranklin.com/products/products.htm


When I was with Applied Spectral Imaging, we used a set of Newport
narrow pass interference filters, 450, 550,0 650, 750 nm to calibrate
our SKY spectral imaging systems (2" = 50 mm sq). I've also used their
optical density filters for O.D. calibration with MetaMorph.

George


On 6/21/2016 9:51 AM, Guenter Giese wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Dear list members,
>
>
> is anybody aware of a source / vendor of big diameter filters for
> illumination wavelength range selection?
>
> I think of something like the old-fashioned Wratten gelatine filters,
> but with a more pronounced wavelength range selection (bandpass
> preferred).
> Diameter:5 to 10 cm, or bigger.
> Filters may be based on glass or gelatine or some other substrate.
>
> Thank you in advance,
>
> Guenter
>

--



George McNamara, Ph.D.
Houston, TX 77054
[hidden email]
713-239-0365 home
305-764-2081 cell
https://www.linkedin.com/in/georgemcnamara
https://works.bepress.com/gmcnamara/75/   Tattletales and T-Bow

[Rusty Nicovich]

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Guenter,

If you're looking for something very simple, akin to gelatine filters, then
look to theatrical lighting.  You can get colored plastic sheet (still
called 'gels' in the industry) up to 2' x 25' (though 20" x 24" is v common
and ~$25/sheet).  Maybe 2-300 colors per maker.  You might not be able to
select any arbitrary bandpass, but the transmission curves are available to
pick out one that might work for your application.  Idea is that you buy a
whole sheet and cut whatever size it is you want out.  You'll probably need
a frame or holder for the flimsy plastic - this is usually a piece of
stamped and folded sheet metal that the plastic gets sandwiched between
before sliding in front of the fixture (a 'gel frame').  They're plastic
and absorbing, so eventually it'll bleach or melt, at which point you throw
it out and cut a new one.

Next step up are dichroics made for theatrical and architectural lighting.
Makers again have a range of colors available, some of which may align to
what you're after.  Because they're made for large fixtures, very large (to
microscopists) sizes are available.  Over 12" diameter for the largest
standard size.  Almost certainly you can get a custom color if you need it
and it might come out cheaper than asking an "optical" filter maker to make
a big custom filter for you.

Rosco and Lee are two big makers of theatrical lighting filters.  If you
ask they'll almost certainly send you a swatch book of all of their
standard gels complete with transmission curves.  The book is fun to play
with even if you don't find the filter you're after.  Every major city (big
enough for a few music venues or theaters) has a lighting supply shop so it
shouldn't be hard to find a local vendor for any of these.

Thanks,
Rusty

On Wed, Jun 22, 2016 at 12:51 AM, Guenter Giese <
[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Dear list members,
>
>
> is anybody aware of a source / vendor of big diameter filters for
> illumination wavelength range selection?
>
> I think of something like the old-fashioned Wratten gelatine filters, but
> with a more pronounced wavelength range selection (bandpass preferred).
> Diameter:5 to 10 cm, or bigger.
> Filters may be based on glass or gelatine or some other substrate.
>
> Thank you in advance,
>
> Guenter
>
> --
>
> ------------------------------------------
> Dr. Guenter Giese
> Light Microscopy Facility Manager
> Dept. of Biomedical Optics
> MPI fuer Medizinische Forschung Jahnstr. 29
> D-69120 Heidelberg, Germany
> Phone [phone] (Fax: -325)
> e-mail: [hidden email]
>