• Ultraviolet Photography

Teardown of micro4/3 UV/IR blocking filter

4 replies to this topic

#1 Dmitry

    Dmitry K.

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Posted 07 September 2018 - 20:08

Since I have internal blocking filter removed from my Olympus e-m10, I trying to break it on pieces. It does contain two layers.

Transparent layer 2mm thickness.
Bluish layer 0.7mm thickness.

They are glued somehow.

Bluish layer is very fragile to heating. Slow heating in water up to boiling does few cracks on it. Transparent layer still solid. I was able to remove tiny bluish piece to measure thickness.

Next phase is to heat it using soldering iron. There is result after 10 minutes of heating. Look at burnt glue areas.

Attached Image: P9070315.JPG

#2 Dmitry

    Dmitry K.

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Posted 07 September 2018 - 20:10

Transparent layer still have some red tint on surface. My goal is to measure it's transmission spectrum.

#3 Dmitry

    Dmitry K.

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Posted 07 September 2018 - 21:29

One more hour of heating
Attached Image: P9080316.JPG

#4 nfoto

    Fierce Bear of the North

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Posted 07 September 2018 - 22:28

Apparently, a rough treatment. Hopefully the parts separate entirely at some time.
Bjørn Birna Rørslett, Ph.D.
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#5 Cadmium


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Posted 08 September 2018 - 02:19

BG type filter glass (BG meaning Blue/Green) can be quite sensitive to heat. It can crack easy when heated. I would not use heat for separation, for any filter glass.
The adhesive is most likely UV curing type, and can be separated by soaking in methylene chloride (nasty stuff, AKA paint stripper), it can take days for separation.
In some cases acetone will work, but it will require much longer soaking time than using methylene chloride.
WARNING: Methylene Chloride. Read the link below, definitely bad stuff.

Edited by Cadmium, 08 September 2018 - 05:16.