Scan document with open lid - bad idea?

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dp62 Regular Member • Posts: 117
Scan document with open lid - bad idea?

Sometimes I would like to scan something that isn't flat, or normal papersize.
For example, small photos, or descriptions on some packing.

I may put them on the glass surface of the scanner, but whilst closing the lid, these things often shift.

The best way would be to something to press them down, some sort of press paper and keep the lid open when scanning.

Out of curiosity...
I've always wondered whether this may be bad for the fluorescent lamp...

Is it always producing the same power no matter whether the lid is closed or not.
(when the lid is closed, there is a white reflection)
Thanks.

olyflyer
olyflyer Forum Pro • Posts: 28,599
Re: Scan document with open lid - bad idea?

dp62 wrote:

Sometimes I would like to scan something that isn't flat, or normal papersize.
For example, small photos, or descriptions on some packing.

I may put them on the glass surface of the scanner, but whilst closing the lid, these things often shift.

The best way would be to something to press them down, some sort of press paper and keep the lid open when scanning.

Out of curiosity...
I've always wondered whether this may be bad for the fluorescent lamp...

It's not a florescent lamp, but a LED strip. At least, in all the more modern scanners.

Anyway, no it doesn't matter for the functionality, but the uncovered area will be black in the prints. If you don't want that, you can always use a sheet of white paper to cover the gaps.

But by that said, it is a good idea to press the scanned area flat against the glass sheet, otherwise the scanned image will be of poor quality or even totally useless, out of focus.

Is it always producing the same power no matter whether the lid is closed or not.
(when the lid is closed, there is a white reflection)
Thanks.

Yes, the light is even over the scanned surface. Maybe some scanners measure the reflected light and adjust to the best possible scan quality, but in the area outside the image, there will be no reflection, so the light output will be at maximum. Also some scanners sense the image edges and only scan that area. Anyway, regardless how your scanner works, leaving the lid open during a scan won't harm the scanner.

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OP dp62 Regular Member • Posts: 117
Re: Scan document with open lid - bad idea?

Thank you very much indeed. This is good to know.
Yes, it is necessary to have something that is pressing the document(s) onto the scanner glass surface.
It is always a bit of cumbersome in case of, for example, series of small photos, or scanning the packing of something.

In case of small photos (often a bit curly), one would arrange them on the glass surface and then gently try to put something on top of that, but what? Something of 20x30cm, maybe a kitchen cutting board or so?

Anyway, that is off-topic.

Thanks again!
Truly appreciated.

PaulWhite Forum Member • Posts: 50
Re: Scan document with open lid - bad idea?

dp62 wrote:

Sometimes I would like to scan something that isn't flat, or normal papersize.
For example, small photos, or descriptions on some packing.

I may put them on the glass surface of the scanner, but whilst closing the lid, these things often shift.

The best way would be to something to press them down, some sort of press paper and keep the lid open when scanning.

Out of curiosity...
I've always wondered whether this may be bad for the fluorescent lamp...

Is it always producing the same power no matter whether the lid is closed or not.
(when the lid is closed, there is a white reflection)
Thanks.

If it was bad for the device, there would be a lot of damaged photocopiers around...

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olyflyer
olyflyer Forum Pro • Posts: 28,599
Re: Scan document with open lid - bad idea?

dp62 wrote:

Thank you very much indeed. This is good to know.
Yes, it is necessary to have something that is pressing the document(s) onto the scanner glass surface.
It is always a bit of cumbersome in case of, for example, series of small photos, or scanning the packing of something.

In case of small photos (often a bit curly), one would arrange them on the glass surface and then gently try to put something on top of that, but what? Something of 20x30cm, maybe a kitchen cutting board or so?

I'd use a sheet of glass and then close the lid on top of that. I have butchered some scanners before, so I have a few sheet, but if you don't have any then you can just buy a cheap A4 / letter size frame with a glass sheet and use that sheet. You can also buy a sheet of perplex (plexi glas) and use that. It is cheap and will apply enough pressure to hold the images in place and you would see if any of them move so you can correct.

Anyway, that is off-topic.

I don't mind, and since there is no forum for scanning discussions, I don't find it off topic.

Thanks again!
Truly appreciated.

You're welcome.

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Nikon Z7
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