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ccs_hello
Carpal Tunnel
Reged: 07/03/04
Posts: 2805
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Hi,
The IR-cut filter is glued to the CCD glass.
Tried Xacto knife scraping the four edge but still can't remove the filter. (Note the filter itself is 3-layered.)
This leads me to believe there must be optical-grade glue in between the filter and the CCD glass window.
Any suggest on how to dissolve the glue is appreciated!
Please note the CCD's chip carrier is plastic. This may cause problem for some methods  .
Clear Skies!
ccs_hello
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ccs_hello
Carpal Tunnel
Reged: 07/03/04
Posts: 2805
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Another pic
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Gama
Vendor (Gama Electronics)
Reged: 08/23/05
Posts: 673
Loc: I come from the land downUnder
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All i can think off is Acetone.
Disolves alot of glues.
Theo.
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Larry Geary
sage
Reged: 09/24/06
Posts: 472
Loc: NJ, USA
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The last time I had to remove glue I used a product called "Goof Off". It may damage the plastic carrier, so what you would have to do is get a fine needle syringe (around 31 gauge) and introduce just a tiny amount under the edge of the glass where you were able to scrape a bit away with the Exacto knife. Just introduce a micro amount, wait a few moments for it to act, then lift with the Exacto. If you are successful in lifting it slightly, introduce more liquid further inside along the glued edges. This is what I did to remove a logo disk from a scope without damaging either the disk or the scope, and the whole operation took less than a minute. Acetone may work using the same technique.
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1-20-2013
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DAVIDG
Pooh-Bah
Reged: 12/02/04
Posts: 1458
Loc: Hockessin, De
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The typical adhesive used in optics is UV cureable. Depending on the type used they can be very resistant to any type of organic solvent. Norland is a big supplier of optical adhesives. You may wish to contact them and see what they recommend.
- Dave
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Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schief. 60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4.5" f/16 Schupmann Medial refractor, 14 Stellafane awards 7 in optics
Engineering = Taking what you have and making what you need.
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walt r
Carpal Tunnel
Reged: 02/13/07
Posts: 2423
Loc: Doylestown, PA
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Heat can help soften many adhesives. Just don't apply too much.
Good luck.
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Walt
Obsession 18" f/4.45 #1370 AN/SC
MK67 Deluxe 6" f/12 Mak-Cass, Super Polaris GEM, JMI MicroMax DSC
DIY 60mm f/6 Achromat
Cookbook 245 CCD
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ccs_hello
Carpal Tunnel
Reged: 07/03/04
Posts: 2805
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Thanks folks!
It turns out the plastic package is rather rigid and strong. Good news!
On the other hand,
{half-time report}
CCD 3, ccs_hello 0
The anti-alias/IR-cut glass chipped.
Using brute force won't snap the filter off.
Using (my hacksaw) Dremmel with regular cutting wheel, it will take out some boundary-layer adhesive but not all. It implies the adhasive is very strong and is located in between the IR-cut (glass type) filter and the CCD glass window.
Obviously I am at the point of no return.
{Final score}
CCD reset-to-Zero, ccs_hello 1
Dremmel the CCD's plastic packaging from its side to make the CCD window easily accessible. Carefully remove the glasses (many pieces) while trying not to let anything physically scratch the die. (Household) vacuum the chip.
So I have the picture #1.
Don't know if it is dead or alive.
Clear Skies!
ccs_hello
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ccs_hello
Carpal Tunnel
Reged: 07/03/04
Posts: 2805
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Since I was not sure I'd further invest a perfectly good UV/IR-cut in this attempt. I used a regular 37mm UV filter glass and Epoxy to seal the chamber.
Sorry no gas (or Nitrogen) purge  .
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ccs_hello
Carpal Tunnel
Reged: 07/03/04
Posts: 2805
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Camera is back.
Now CCD has been under physical stress, exposed to ambient, "kind of" sealed with air.
It is living on the borrowed time.
Here is the cam:
Polaris USA DX-9263SL
CCD is a nice ICX408AK
Clear Skies!
ccs_hello
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ccs_hello
Carpal Tunnel
Reged: 07/03/04
Posts: 2805
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IR is allowed in.
See the characteristic pink picture.
Clear Skies!
ccs_hello
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