[Simh] DIY microfiche scanner?

[Tim Stark]

Ok, thanks for some replies.   I have CanonScan 9000F Mark II flatbed.  It have optical 9600 dpi CMOS sensor with interpolation up to 19,200 dpi.  Also, I will try HD microscope camera (40x to 1000x) someday.  I have backlight pad for scanning.

 

I have some fiche films for technical manuals which are not in Bitsavers yet like DECserver 200 tm, CI 780 tm, etc.   When I have scanned docs, I will send them to bitsavers.  They can be useful for developing emulators. 

 

I read Al’s links (vintage computing forum), I was surprised to notice a lot of fiches about VMS sources.

 

I was trying to find Avanti technical manuals (AS200/400) but found separately technical manuals like CPU, PCI chip, etc. because Alpha servers are based on PC architecture. 

 

Tim

 

From: Simh [mailto:simh-bounces at trailing-edge.com] On Behalf Of Sergii Kolisnyk
Sent: Saturday, February 24, 2018 6:39 PM
To: simh <simh at trailing-edge.com>
Subject: Re: [Simh] DIY microfiche scanner?

 

 

 

On Feb 24, 2018 18:21, "Al Kossow" <aek at bitsavers.org <mailto:aek at bitsavers.org> > wrote:



On 2/24/18 8:19 AM, Sergii Kolisnyk wrote:
> Isn't 4800x9600 DPI just enough?

No

read the thread I just posted

 

 

The thread says:

As you can see from 1ajs's 4800dpi example, even these could "nearly do".

 

Also I think saving uncompressed 9600 DPI from 4800x9600 scanner may be much better.

 

Could it be tried?

 

I've calculated fiche DPI for posted DEC images (TA11 bootstrap), it's about 3200.

1110*16/5.75 = 3089 DPI

You can add a few percents for margins.

 



DEC crammed a lot of frames on a fiche sheet

 

 

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