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Old 17-07-2019, 09:41 AM
Poita (Peter)
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Diffuser/Opal Glass in Australia?

I need a 50mm diameter opal glass or similar diffuser to give a near lambertian diffusion from a LED COB.

I have found them at Knight Optical and Edmund Optics, but the postage is around $100 or more.

Does anyone know where to source such a thing locally in Oz?
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Old 17-07-2019, 10:22 AM
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DavidU (Dave)
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Just get a 50mm camera lens filter, remove the glass and then wet sand it with #800 wet and dry sandpaper, works a treat and would be very cheap.
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Old 17-07-2019, 06:04 PM
Hemi
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Pardon the ignorance, can I ask what you use a lambertian diffuser for? Im guessing for flats but am a relative newbie so no laughing.

Cheers

Hemi
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Old 19-07-2019, 01:18 PM
Poita (Peter)
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To be honest, it isn't for Astronomy, but I thought I'd ask in here as there are so many optics gurus.
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Old 16-09-2019, 10:03 AM
JohnF (John)
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I have a German Lietz microscope ground glass projection screen in holder for sale. It has ground opal glass in it, but is about 8 inches in diameter.

I live 12km north of Nimbin in NNSW.

It will be cheap -- make me an offer. Would swap for some telescope Eyepieces.

This is not it, but similar to give you an idea of what I mean. Microscope is not included.

http://www.radicalmicroscope.com/stu...e-1224566.html
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Old 17-09-2019, 08:03 PM
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Exfso (Peter)
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I use Opal perspex for my light box diffusers, dont suppose that helps much if you specifically want glass.
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