Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

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by dpc
Yesterday, 15:47
Forum: Scanners and Build Threads
Topic: PVC pipe scanner with 100 degree platen
Replies: 25
Views: 1878

Re: PVC pipe scanner with 100 degree platen

It would be helpful if you posted an image containing the mystery "line reflection". My guess from looking at your previously posted photos of your partially completed scanner is that you're seeing a reflection of the gray USB cable going to that right-side camera. Also a final picture of your scann...
by dpc
01 Jul 2021, 11:21
Forum: Scanners and Build Threads
Topic: PVC pipe scanner with 100 degree platen
Replies: 25
Views: 1878

Re: PVC pipe scanner with 100 degree platen

For the residual reflections you are seeing, remember that dpc has a proven method for removing those in software. Are you referring to the post-processing step that is used to compensate for uneven lighting across the page? I'm not sure that would work very well for mitigating reflections because ...
by dpc
29 Jun 2021, 15:25
Forum: Scanners and Build Threads
Topic: PVC pipe scanner with 100 degree platen
Replies: 25
Views: 1878

Re: PVC pipe scanner with 100 degree platen

The height of the light can change without producing a reflection if you change the size of the pages. That is, you may have to position the light higher for books with large pages, but when scanning smaller pages the light can be lowered since the area of the platen that is reflecting an image of t...
by dpc
28 Jun 2021, 12:00
Forum: Scanners and Build Threads
Topic: PVC pipe scanner with 100 degree platen
Replies: 25
Views: 1878

Re: PVC pipe scanner with 100 degree platen

The 100 deg. platen angle prevents the image of the adjacent platen pane from being reflected into the shot, not the light. In order to prevent the light from reflecting off of the platen you have to raise the height of the light over the platen and/or decrease your cameras' viewing angle by moving ...
by dpc
25 Jun 2021, 10:36
Forum: Scanners and Build Threads
Topic: PVC pipe scanner with 100 degree platen
Replies: 25
Views: 1878

Re: PVC pipe scanner with 100 degree platen

It has to be angled downward due to there simply being no space behind it before hitting the wall (you can see that in the picture in the previous post - there's a matter of only a few inches' wiggle room), so it will have extra weight attached to it. I still don't understand why the arms need to t...
by dpc
24 Jun 2021, 12:08
Forum: Scanners and Build Threads
Topic: PVC pipe scanner with 100 degree platen
Replies: 25
Views: 1878

Re: PVC pipe scanner with 100 degree platen

The PVC/wood combining I was asking about turns out to be the PVC pipes of the bottom frame resting on wood supports, and he's planning on drilling down through the PVC pipe and just screwing them into the wood. That'll work. You could also put an inline PVC 'T' fitting there (with the leg of the T...
by dpc
08 Jun 2021, 13:34
Forum: Scanners and Build Threads
Topic: a small story for my scanner
Replies: 71
Views: 54028

Re: a small story for my scanner

If you want to see reflections, put black paper under the platen, leave the lights ON, then photograph the black paper. I'm not sure what photographing book pages with the lights OFF shows, other than light contributions to your images from light sources other than the scanner's light.
by dpc
27 May 2021, 18:08
Forum: Lighting
Topic: Lighting for PVC pipe scanner
Replies: 20
Views: 3109

Re: Lighting for PVC pipe scanner

The Viltrox light's housing has a threaded 1/4-20 hole on the bottom edge (this is the same thing that most cameras have to mount to a tripod). I don't know why you'd use a hot shoe mount with this light unless you're going to mount it on the hot shoe of a camera. I'm unaware of how Landin mounted t...
by dpc
24 May 2021, 16:05
Forum: Lighting
Topic: LED lamps 'Warm' or 'Cold' light - Does it matter?
Replies: 6
Views: 2102

Re: LED lamps 'Warm' or 'Cold' light - Does it matter?

I'd strongly encourage anyone that is worried about the color temperature of lights affecting their photographed pages to use a camera that supports custom white balance control instead of a smartphone (although it's possible that some of the camera apps on newer phones may also support this feature...
by dpc
16 May 2021, 01:01
Forum: Lighting
Topic: Lighting for PVC pipe scanner
Replies: 20
Views: 3109

Re: Lighting for PVC pipe scanner

...it could also be the case that dpc with probably greater experience examined the light produced more closely. Here's a simple experiment that may help to explain things... If you put your camera in the bottom of the platen 'v' and pointed it straight up to photograph the light source above, what...