The Electromagnetic (EM) Spectrum is simply a name scientists use when referring to the entire range of radiation types. Ultraviolet radiation is that part of the electromagnetic spectrum between visible light and x-rays. An interesting characteristic of UV radiation occurs when it falls upon certain substances know as phosphors (phosphorescent substance), where it causes the phosphors to emit specific visible radiation which is known as fluorescence. To fully understand how a thermal image, or thermogram is produced, some background knowledge of the physics of light is needed. Visible light is made up of a spectrum of colours (those you seen in a rainbow), in this spectrum violet has the most energy and red has the least. As well as the visible light spectrum there are also UltraViolet (UV) and InfraRed (IR) Spectrums either side of it. You're probably very familiar with both near and mid-InfraRed as they're used by a variety of electronic devices, e.g.
The key difference between Thermal-IR and the other categories is that it's emitted by an object instead of being reflected off it. An IR camera is used to measure the heat photons emitted from the animal and to convert them into electrical impulses which are then displayed as coloured images on a monitor. These pictures were taken with the FLIR veterinary thermal imaging camera, which has the ability to simultaneously take and then fuse together visible light and thermal images. Wool is a fantastic insulator, so heat is not emitted through her fleece, and this area doesn't even register on the thermal scale.
Since there is a high degree of thermal symmetry in the normal body, subtle abnormal temperature asymmetries can be easily identified. After the images have been taken by the thermal imaging camera, they are digitally mastered on a PC. On the left an eventer prepares to head out on the cross country course; would his knees worry you?
On the right a mare shows some unusual cold spots on her side; would you want to do further tests? The eventer's knees appear unusually hot, but this is due to the radiation from the sun warming him. See how a Veterinary Thermal Imaging Camera works and how thermograms are produced to help improve animal health.

Veterinary Thermography can help in the diagnosis of musculo-skeletal problems, soft tissue injury, nerve damage, dermatological and dental issues in animals. The technology inside animal thermal imaging cameras - used for animal and equine thermography - and how veterinary reports are generated.
After thermally imaging your animal, we will interpret the thermograms and produce a comprehensive veterinary thermal imaging report for you and your vet.
A short history of thermography from Hippocrates to modern day animal and equine thermography using state of the art digital infrared thermal imaging cameras.
Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation.
While every effort has been made to follow citation style rules, there may be some discrepancies. Unlike x-rays, UV radiation has a low power of penetration, with effects on the body limited to skin and eyes. A similar effect is phosphorescence in which the emission lasts longer after the UV source is removed. The amount of energy in each light wave is related to its wavelength; shorter wavelengths have more energy.
About 60% of all the heat an animal produces passes into the surrounding air as radiant heat, or heat photons.
This visual image graphically maps the animal’s body temperature and is referred to as a thermogram. The corners of the eye are always the warmest points on any animal as the skin is thinner here, allowing heat to radiate out easily. This ensures that differences with the thermal scales between images are eradicated, and a true like-for-like comparison is produced. To the untrained eye these can give a ‘false positive’, so experience and knowledge is a key to producing accurate thermograms for interpretation.
The clue is in the lorry ramp which has also faced the direction of the sun for some time and warmed up.
Water blocks the emission of infrared radiation, even a small amount like this saliva can create dramatic looking thermal patterns. UVA, (know as longwave or blacklight), is radiation with wavelengths between 315nm and 400nm.

Direct and indirect exposure to UV, especially in the UVB and UVC range, include sunburn, aging and carcinogenic changes. Many practical applications have been developed that take advantage of these unique properties triggered by UV light. The remaining heat is lost to the environment by evaporation (25%), conduction to objects (3%) and conduction to the air (12%). The heat detector, or microbolometer within the thermal camera can detect differences in temperature of less than 0.05oC, which is 40 times more sensitive than the human hand. As the ear is concave, the infrared radiation bounces around and concentrates in this area making it appear warmer.
For example, if legs have been bandanged, or blisters or liniments have been used, they will show up as areas with increased heat. The motion of these charged particles produces energy that can be described as traveling as waves. Other examples of EM radiation are ultraviolet and infrared light, microwaves, X-rays and gamma-rays.
UVB ( midrange) spans wavelengths from 280 to 315nm and UVC (shortwave) covers 280nm down to about 30nm.
UV protective eyewear, clothing and creams are recommended whenever exposure to UV is possible.
Thermal-IR is the part of the Spectrum we're interested in for Thermography (Thermal Imaging). A “cold spot” is a reduction in blood supply usually due to swelling, thrombosis, scar tissue or increased tone in the nervous system. These remodelled images are then compiled electronically into a Veterinary Thermal Imaging report. External environmental factors can also play a part, if the animal has been in the sunlight or lying on one side, or there are draughts, this will again affect the image, therefore a strict preparation protocol must be followed before each consultation and time is spent carefully taking a history and examining the environment.

Glue glass to metal
Cure loca glue in sun

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