Very small laser scanner needed

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piotr.pioro
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Very small laser scanner needed

Post by piotr.pioro »

Hi all,

I wonder if it is possible to scan a small space (2 sqm) that can be only accessed through a 5cm hole? Is there so small scaner?

Piotr

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Mike Annear
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Re: Very small laser scanner needed

Post by Mike Annear »

Hi,
Google "void cavity scanner"
These are used a lot in the mining industry, I am not sure if they are now small enough to fit into a 50mm hole, the ones that I have seen are quite a bit larger.
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Mike
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Re: Very small laser scanner needed

Post by jcoco3 »

Any idea what your accuracy needs are for this scan?

I have been wanting to build my own cavity scanner from a depth camera just in case a scan like this popped up. This could be done with some of the smaller inexpensive devices like prime sense, or intel realsense depth cameras. Depending on the software used a small led light would have to be added to provide enough light for the software tracking to function properly. A method to articulate the device around so you can obtain a complete scan would also be required since the depth cameras have a limited field of view. This could be done with either a simple servo or even a hand operated mechanical mount added to the end of a pole. The pole would also need to be twisted around to obtain a complete the scan.

Sorry for indulging in this fantasy, as you might not have time or desire to construct your own. It is just something I have wanted to do for a while, but have not had the time.

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Re: Very small laser scanner needed

Post by dhirota »

jcoco3 wrote:
Thu Jun 25, 2020 12:18 pm
Any idea what your accuracy needs are for this scan?

I have been wanting to build my own cavity scanner from a depth camera just in case a scan like this popped up. This could be done with some of the smaller inexpensive devices like prime sense, or intel realsense depth cameras. Depending on the software used a small led light would have to be added to provide enough light for the software tracking to function properly. A method to articulate the device around so you can obtain a complete scan would also be required since the depth cameras have a limited field of view. This could be done with either a simple servo or even a hand operated mechanical mount added to the end of a pole. The pole would also need to be twisted around to obtain a complete the scan.

Sorry for indulging in this fantasy, as you might not have time or desire to construct your own. It is just something I have wanted to do for a while, but have not had the time.
Jonathan:
It is not that difficult. I have my home built unit using an INTEL D415 on a Samsung 10+ (8cm wide) using the flashlight app for illumination. I have never tried it out in total darkness or in a space that it might get lost, yet.
Dennis Hirota, PhD, PE, LPLS
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Re: Very small laser scanner needed

Post by jcoco3 »

Wow Dennis, that is very cool and a very good idea for this problem. Sounds like I need to purchase a d415 to upgrade from my antique Asus Xtion :lol:

Is that a custom app you are using or something that anyone can purchase?

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Re: Very small laser scanner needed

Post by Phil Marsh »

LASER SCANNING FORUM
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Re: Very small laser scanner needed

Post by Mike Annear »

jcoco3 wrote:
Thu Jun 25, 2020 12:18 pm
I have been wanting to build my own cavity scanner from a depth camera just in case a scan like this popped up.
Hi Jonathan,
Did you see this during the week ?
https://www.dotproduct3d.com/blog/l515

Regards,
Mike.

EDIT.... just saw this :)
viewtopic.php?f=185&t=16456
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Re: Very small laser scanner needed

Post by jcoco3 »

Thanks to this forum I had not missed it :D Makes sense that DotProduct would be the first to take advantage of the new sensors. I checked out the preorder pages of the D455 and the L515, but have not made an order...yet.

Biggest concern I have before purchasing another small scanner of this type is two basic things. Full sun performance, and scanning in complete darkness. If any of these can do both, then I would buy one in a snap.

I also thought intel's use of the term "Coded Light" a better fit for the tech than depth cameras (which makes me think more of a stereo pair), or structured light (which is more akin to David scan projector based systems). Now what do we call the MEMs based lidar like thenD455? Not sure I have seen any others like it.

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Re: Very small laser scanner needed

Post by dhirota »

jcoco3 wrote:
Sat Jun 27, 2020 8:52 am
Wow Dennis, that is very cool and a very good idea for this problem. Sounds like I need to purchase a d415 to upgrade from my antique Asus Xtion :lol:

Is that a custom app you are using or something that anyone can purchase?
I am using DotProduct software.
Dennis Hirota, PhD, PE, LPLS
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