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What is the surface roughness (Ra) of the MBP A...

Hallo,

Could anyone tell me what the surface roughness parameters (defined at https://en.wikipedia.org/wiki/Surface_finish) for the Aluminium notebooks/computers are?

Other than that, I might have to consider sticking my device under a profilometer/tally surf machine.

Thanks.

Samuel

The anodized layer on the aluminum is very thin.

Hello Leroy,

Thanks for the response. Do you know how thin?

I kinna need specific numbers for this.

Thanks.

Samuel

Patents - Publication number US20140001052 A1

"the anodic layer may be approximately 35-40 micrometers thick"

For any who might be interested: The aluminium body on the MBP has a roughness (Ra) of 1.83 micrometers.

Thanks

You have aroused my curiosity.  Why would some one want to know the 'roughness' (Ra) of a MBP?

Ciao.

Hallo Ogelthorpe,

I've just designed a camera chip that can use light to detect ultrasound signals from rough surfaces. It is useful for detecting subsurface structure, damage precursors, cracks or other defects. (Non Destructive Testing/Evaluation). From a scientific/engineering point of view detection of the ultrasound is challenging when the surface is not smooth (mirror-like finishes are fantastic and easy to work with).  Its targetted at material characterisation, pipe inspection, thickness measurement, etc.

Imagine an ultrasound scanner that doesn't need contact with mother's skin to observe a foetus? What this detector does is analagous to doing that, doing it safely, and doing that even if mother is a hairy chimp.

I wanted a relatively commonplace item to showcase what the detector can work with (roughness - how hairy mummy is), and the macbook pro aluminium popped into mind.

Good news is the detector can quite easily work with that roughness!

Ciao!

I'm impressed.  A friend of mine has a large commercial charter boat and just recently had the hull audio gauged.  Would you device perform the same function? 

Also would it be able to detect cracks in the rigging?  Currently one of the 'tricks' is to swap iodine over potential cracks.  In this case it is 1x19, 316 SS wire.  Would it also perform the function in solid rod rigging?

Ciao.

Yes that is the same principle/function. We can find faults of micrometer size in aluminium, steel, titanium, composites, etc, so inspecting the hull would work fine and so would the rigging (I hope that answers your question - boats aren't my forté). I hope your friend's boat was alright.

Our tech hasn't yet matured enough to be used as a handheld device in the field, but here's hoping we get funds to get it there soon.

Perhaps I have identified an additional area where there are commercial opportunities for your technology.  What I find most interesting that in addition to metals you also include composites.  That would never have occurred to me.

achyeboah wrote:

 

Our tech hasn't yet matured enough to be used as a handheld device in the field, but here's hoping we get funds to get it there soon.

That often means the difference between commercial success or failure, or degree of success. (viz. the computer industry)

Ciao.

You may find a market in the auto racing world, especially the high end world where internal cracks (in carbon fibre) can put a swift end to a 20 million dollar car.

Where are you located, the UK is the hub of fast car design (in the racing world)

Good luck (contact McLaren Engineering, Woking, Surrey, UK)

Where did you find this info? I'm also looking for it.

Thank you. How did you check it?

最後更新：2017-08-29 22:54:51

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