Calibration Boards

Discuss about cameras, projectors, calibration panels, turntables etc.
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fritts
Posts: 20
Joined: 14 Nov 2016, 17:52

Calibration Boards

Post by fritts » 25 Jan 2017, 01:04

Wondering if anyone has used a service like the one at the link below for making their calibration panels on aluminum. I have the polyboard David calibration files and though fairly sturdy have question printing some that might be a bit more accurate.

http://www.zno.com/metal-print.html

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avogra
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Posts: 99
Joined: 11 Nov 2016, 17:27
Location: Munich, Germany
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Re: Calibration Boards

Post by avogra » 31 Jan 2017, 00:01

I'm not yet long enough in the whole David business, but didn't David make the first calibration panels out of Dibond? Or is that something different? Yet I think nothing beats the current design with glass panels. I suppose any metal will bend a slight amount when there is something attached on only one side.

lovebay1
Posts: 8
Joined: 23 Jan 2018, 17:03

Re: Calibration Boards

Post by lovebay1 » 26 Jan 2018, 21:50

My selfmade calibration board, support is 3dprinted and designed by me.
Now I'm waiting courier for my projector...
20180126_223915.jpg
20180126_224005.jpg

Alonso
Posts: 17
Joined: 05 Dec 2016, 05:55

Re: Calibration Boards

Post by Alonso » 29 Jan 2018, 18:00

They look nice lovebay! What are the panels made out of?

lovebay1
Posts: 8
Joined: 23 Jan 2018, 17:03

Re: Calibration Boards

Post by lovebay1 » 29 Jan 2018, 18:48

Thanks Alonso, it is made with adhesive printing on forex 5mm.
Then i designed white 90 degree plastic support and 3d printed.

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Micr0
Posts: 264
Joined: 15 Nov 2016, 15:20

Re: Calibration Boards

Post by Micr0 » 13 Mar 2018, 02:46

fritts wrote:
25 Jan 2017, 01:04
Wondering if anyone has used a service like the one at the link below for making their calibration panels on aluminum. I have the polyboard David calibration files and though fairly sturdy have question printing some that might be a bit more accurate.

http://www.zno.com/metal-print.html
Old Thread but I just had a set of 350mm panels made via a similar process. I will be testing them for accuracy and see how they work in the next week or so. will report back. one problem I already see is that the edge definition (the printed edge) isn't great. you can clearly see the pixelation of the printing. more later.
µ

martan
Posts: 6
Joined: 23 May 2018, 19:18
Location: Sweden

Re: Calibration Boards

Post by martan » 17 Jun 2018, 07:07

Thread lift :-)

I made angles in my milling machine to be certain of the 90-degree angle. (Tried 3D-printed but not good enough. Measuered at work.)
Then called the local glass shop (glazier?) and ordered two pieces of ordinary 3mm window glass.
It cost me SEK 50 (about 5 Euros).

Glued the glass into the angles with silicone.
Printed the A4 Calibration left/right printouts on Polyester (Avery/Zweckform L4775) in my cheap home laser printer.
(Ordinary paper is moist sensitive and hard to mount/align.
Polyester is mounted with a drop of soap and water and can be easily aligned to each other)

Scale 145 mm.

This panel calibrates easily to RMS < 0,2 on both cameras.

Some pictures. The 40 scans (!) and the fused result (Vertex spacing 0,16mm, Sharpness 0). Carburettor test object as always :-)
Attachments
angle.JPG
Angle
scans.JPG
Scans
fusion.JPG
Fusion

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