Infrared Thermal Imaging: Fundamentals, Research and by Michael Vollmer

By Michael Vollmer

This richly illustrated hands-on consultant is designed for researchers, lecturers and practitioners. the massive number of examples taken from technology, uncomplicated instructing of physics, sensible purposes in and a number of different disciplines spanning the diversity from medication to volcano examine permits readers to choose those who come closest to their very own person activity to hand. Following a glance on the basics of IR thermal imaging, houses of the imaging structures, in addition to simple and complicated equipment, the e-book is going directly to talk about IR imaging functions in educating, examine and undefined. particular examples comprise thermography of constructions, microsystems and the quite new box of IR imaging of gases.

Impartially written by way of specialist authors within the box from a popular utilized technological know-how establishment, who're within the detailed place of getting either adventure in private and non-private learn and in instructing, this complete e-book can be utilized for educating novices within the box in addition to supplying additional schooling to really good employees, scholars and researchers.

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Extra resources for Infrared Thermal Imaging: Fundamentals, Research and Applications

Example text

The maximum radiant power that can be emitted by any object depends only on the temperature of the object that has led to the term thermal radiation. 4). 5) of thermal radiation. These are called blackbodies. Blackbodies resemble ideal surfaces, having the following properties [20]: 1) A blackbody absorbs every incident radiation, regardless of wavelength and direction. 2) For given temperature and wavelength, no surface can emit more energy than a blackbody. 3) Radiation emitted by a blackbody depends on wavelength, however, its radiance does not depend on direction, that is, it behaves like a Lambertian radiator.

114, that is, emissivity has increased by a factor of nearly 3 owing to this surface structure. The basic idea behind this enhancement explains why any rough surface has higher emissivity than polished flat surfaces. Regular surface structures often lead to nonuniform angular distributions of emissivity. 36) reveals strong variations of emissivity as a function of observation angles. 5 Wavelength As is well known in optics, material properties usually depend on wavelength. 04 (after [32]). and copper (Cu).

For simplicity, let us assume TBB1 = 303 K, TBB2 = 302 K, since most detector sensitivities are rated at T = 30 ◦ C. The integral values can be easily derived from F(λ1→λ2) . 38 is assumed. 2 × 10−4 W). A typical standard lens of an IR camera has an acceptance angle of 24◦ . 86◦ . If 24◦ corresponds to the 320 pixel width of the detector, the blackbody source will be imaged on an angular diameter of about 19 pixels, corresponding to a circular area with about 1140 pixels. 54 nW K−1 . 2); second, the camera optics has a transmission smaller than 100% and third, the active detector area is only about 50% of the complete pixel area.

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