Category Archives: Glossary


Was bedeutet eigentlich Auflösung in der Welt der digitalen Bilder? Nun, stell dir vor, jedes digitale Bild ist wie ein Mosaik aus winzigen Pixeln. Wir messen Auflösung in Pixeln pro Inch (PPI). Das bedeutet, wie viele Pixel es auf einem Zoll (etwa 2,54 cm) gibt. Wenn du also eine hohe Auflösung hast, gibt es viele Pixel pro Inch.

Aber Moment mal, Auflösung ist nur ein Teil des Bildqualitäts-Puzzles: Es ist wie ein Stück in einem großen Spiel. Es sagt dir nur, wie viele Pixel da sind, aber nicht, wie scharf diese Pixel sind. Stell dir vor, du hast zwei Bilder mit der gleichen Auflösung, aber eins ist super scharf, und das andere ist verschwommen. Da siehst du den Unterschied!


Nun, wie viel Auflösung brauchst du? Das hängt von dem ab, was du vorhast. Wenn du zum Beispiel eine winzige Briefmarke digitalisieren und dann auf einem riesigen Poster drucken möchtest, dann ist eine hohe Auflösung definitiv dein Freund.


Und hey, wenn du mehr Auflösung in deinem Leben möchtest,  könnte dich vielleicht die neue budgetfreundliche M150 interessieren! 😉

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PPI stands for "Pixel per Inch". It describes [...]


Sensor technology


Image sensor/area sensor

Image sensor/CMOS versus CCD

Line sensor



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Image sensor / area sensor

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Lighting system

Professional scanners should have a lighting system that provides uniform and gentle illumination and can adapt variably to a wide variety of originals, depending on the specific requirements. In addition, the light sources should be glare-free as well as UV/IR-free, so that there is no radiation exposure for the user in accordance with EN60825-1.

LED lighting unit: Less is more!

All our book2net scanners are therefore equipped with a LED lighting system as standard, which provides a stable color temperature during the scanning process and thus guarantees true color reproduction. When using conventional LED light bands, different luminous intensities also occur in due to the different light paths on the surface, depending on the position of the light source. Therefore, we use only Fresnel lenses, which compensate for this process and provide uniform illumination of the entire scan area.

Thanks to the CMOS sensor technology we use and innovative process optimization, our scanners operate with an extremely reduced illumination time of 0.6 sec. This guarantees particularly gentle recording of originals with the lowest light requirement to avoid irretrievable damage to paper, ink and colors that can be caused by excessive light intensity.

In addition, we have optimized the design of our devices to ensure the best possible illumination and to assure constant scan quality:

The elegant black design of our scanners prevents annoying back reflections.

The rear-mounted lighting system and optimized housing curvature provide the optimum angle of light incidence to avoid uncontrolled reflections into the optics caused by the curvature of the side.

All of our lighting units are customized for specific applications as fixed components of our high-quality systems.


Additional lighting: optimal illumination for large formats and precious old books

Large formats and particularly valuable old books with waved surfaces, special inks, gold grounds and gildings require more than standard illumination.

To meet these special requirements, we have developed auxiliary lighting for our Ultra, Flash, Mosquito, Hornet and Cobra production scanners that can be integrated, mounted or controlled externally as required. The additional lighting can be easily synchronized with the integrated scanner lighting via a light control module. This ensures optimum shadow- and reflection-free illumination.


Sided light: individual illumination for special requirementsn

Some of our devices such as our reprographic systems and book2net Archive Pro scanners also feature individually controllable back and side lighting units to enable application-specific lighting scenarios.

Lighting scenarios with book2net reprographic system to highlight different features on a coin.

Advantages of the book2net lighting system:

Modern, LED lighting concept (UV/IR and ozone free, according to EN60825-1)

Glare- and flicker-free light (no flash effects)

Low energy consumption < 100 W

Stable color temperature of 5500 Kelvin

Lowest light intensity; controllable from 1000 to 3500 lux

LED lighting units individually adjustable and controllable according to special requirements

Unique Fresnel lens concept for uniform illumination of originals

Continuous regulation of the light emission angle

Additional illumination (optional)

Extremely long service life (10,000 working hours)

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LEDs (light-emitting diodes) are energy-saving light sources (ESL). [...]

Fresnel lens

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Exposure time

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UV fluorescence

UV fluorescence examination is a non-destructive examination method used on works of art. It uses UV radiation to make surface phenomena visible that remain hidden to the human eye in normal light. This allows important insights into the condition of the objects to be obtained, particularly in paintings for the visualization of varnish layers, retouching and overpainting. Occasionally, it is also possible to narrow down the material groups used (including binders).

The short-wave UV radiation stimulates the materials used (e.g. varnishes, binders, pigments) to fluoresce. The different fluorescence properties of the materials used allow a differentiated perception.

UV fluorescence photography should not be confused with UV photography or UV reflectography.

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Fluorescence refers to the ability of some atoms and molecules to absorb light at a certain wavelength (the excitation: Ex, excitation) and then to emit light of a longer wavelength during a short-lived emission (Em).

Art technology, among others, makes use of this property when examining works of art. Properties can be detected and assigned to specific materials; the spectrum thus becomes material-specific, a kind of optical fingerprint. The storage of such reference spectra in reference databases supports the work of scientists in their research.

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Luminance is a photometric measure of the luminous intensity (brightness) per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle. The standard unit of luminance is candela per square meter (cd/m2).

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Environmental protection

Environmental protection refers to the entirety of all measures to protect the environment, in which ecological action is in the foreground.

At MICROBOX/book2net we act ecologically and considerately by saying “YES” to Germany as a business location. In the development and production of our scanners, we attach particular importance to low energy consumption, not only with regard to the consumption of the end product, but also during the manufacturing process. If possible, we also offer the revision of old scanning systems to the latest status as an alternative to buying a new one.

We recycle everything that can be recycled and, if necessary, only work with certified waste disposal companies.

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With this in mind, we at MICROBOX act sustainably and considerately and [...]