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It is therefore capable of penetrating deeper into the material and generates fewer surface reflections than short-wave light. In the range between nm and nm normal monochrome CCD cameras can still be used for inspection, the sensitivity of which indeed increasingly diminishes but is basically sufficient. Therefore preferably LEDs with a range of approx. All visible colors except black, very dark colors with black admixtures and metallic colors disappear.
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In industrial machine vision, however, most of the applications are located in the near infrared range, which comprises the spectral range from to nm. The optics no longer consists of normal glass, but are made of materials like germanium. Bright colors appear brightthe dark colors are normally dark IR LED with nm All visible colors except black, very dark colors with black admixtures and metallic colors disappear.
Daylight shot for comparison Daylighht – Mono8 Daylight. All visible colors disappear on banknote and credit card except for black and special security features.
In case of the longer wavelength, lower straying at the surface and thus a better screening of the test object is to be expected, however the sensitivity of common CCD 50066 sensors is increasingly reduced.
Cameras for the evaluation of the medium IR range are called thermographic cameras or thermal imaging cameras.
IR radiation is often also called thermal radiation. Daylight shot for comparison Daylight – Mono8 Daylight.
For longer-wave IR ranges, Peltier-cooled sensors and special semiconductor materials must be used. As IR radiation is not visible to the human eye, it can be applied particularly well bbi workstations where normal light would be disturbing. When using IR radiation it is sometimes even possible to look through an object. Bright colors 50006 brightthe dark colors are normally dark IR LED mit nm All visible colors disappear on banknote and credit card except for black and special security features Daylight – RGB Colour image.
The wavelength range from approximately nm to 1 mm, i. IR illumination The wavelength range from approximately nm to 1 mm, i. Longer-wave radiation is electromagnetic radiation and therefore oscillates less frequently than shorter-wave radiation and thus generates less interaction with the material.