projekte:dvdlsm:start
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Beide Seiten der vorigen RevisionVorhergehende ÜberarbeitungNächste Überarbeitung | Vorhergehende ÜberarbeitungLetzte ÜberarbeitungBeide Seiten der Revision | ||
projekte:dvdlsm:start [2021/02/07 00:28] – [OPU Modification] thasti | projekte:dvdlsm:start [2021/02/07 22:25] – [PDIC] thasti | ||
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~~NOTOC~~ | ~~NOTOC~~ | ||
- | ====== DVD-Drive-Based | + | ====== DVD-Drive |
- | {{ : | + | {{ : |
Due to an abundance of one specific type of DVD drives, plans were made to give a useful afterlife to these devices. A laser scanning microscope seemed to be the most useful project. | Due to an abundance of one specific type of DVD drives, plans were made to give a useful afterlife to these devices. A laser scanning microscope seemed to be the most useful project. | ||
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It was conjectured that the smaller inner quadrants were responsible for the low-sensitivity outputs, while the outer segments would produce a large amplitude (due to their larger light collection area). | It was conjectured that the smaller inner quadrants were responsible for the low-sensitivity outputs, while the outer segments would produce a large amplitude (due to their larger light collection area). | ||
- | In a second reverse engineering session, the exact pinout was determined by means of selective illumination: | + | In a second reverse engineering session, the exact pinout was determined by means of selective illumination: |
{{: | {{: | ||
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- | Higher | + | Higher |
{{: | {{: | ||
- | Scan of an I2C test chip from my colleage | + | Scan of an I2C test chip from my colleague |
{{: | {{: | ||
- | This picture shows some of the aforementioned nonlinearity in one axis, which introduces periodical distortions in the image. These could be corrected in principle, but I didn't bother. The nice CERN logo was placed on the top metal layer, and is composed | + | This picture shows some of the aforementioned nonlinearity in one axis, which introduces periodical distortions in the image. These could be corrected in principle, but I didn't bother. The nice CERN logo was placed on the top metal layer, and some of the lower level metals |
Also from this chip, here's a few very small scans performed at 200 nm step size. Small metal filling patterns on the top metal layer are imaged, each of which is only about a two micron wide square. Lithographic imperferfections can clearly resolved using this imaging technique. The horizontal (black) lines were caused by the erratic X-axis stage, sometimes going to places it was not told to go... | Also from this chip, here's a few very small scans performed at 200 nm step size. Small metal filling patterns on the top metal layer are imaged, each of which is only about a two micron wide square. Lithographic imperferfections can clearly resolved using this imaging technique. The horizontal (black) lines were caused by the erratic X-axis stage, sometimes going to places it was not told to go... | ||
{{: | {{: | ||
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+ | Finally, here are two videos of the device in Action: | ||
+ | * Focusing: https:// | ||
+ | * Scanning: https:// | ||
===== Summary ===== | ===== Summary ===== | ||
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* PC software: https:// | * PC software: https:// | ||
- | + | ===== References ===== | |
+ | I'm of course not the first one to build something like this. Here's some sources of my own inspiration: | ||
+ | * http:// | ||
+ | * https:// | ||
+ | * https:// | ||
+ | * https:// | ||
projekte/dvdlsm/start.txt · Zuletzt geändert: 2021/02/07 22:25 von thasti