There are a couple of images below taken with an A6703sc, both images are of a £2 coin, one with a 50mm lens, the other with a 1X microscope lens.
This is an excellent question. Of course it does depend on how far away the object is from the camera. Camera specifications usually give a figure for FOV and IFOV, but seldom quote the MFOV. FOV (Field of View), this refers to everything that the camera can see, as it will depend on the distance to … Read More
Objects begin to glow when they become incandescent. Incandescence is a name given when objects begin emitting thermal energy in the visible part of the electromagnetic spectrum. This usually starts at about 500-525 degrees C. As an object heats up two things happen. Firstly they emit more radiated energy. Secondly, the peak wavelength of the … Read More
I have come across much discussion online about Delta T and their importance. Some people consider low Delta’s to be irrelevant. I even came across the following statement “some people call for a repair with temperature differences of 5 Deg C. I say no need”. From a personal point of view I consider it unprofessional … Read More
Can you carry out thermography surveys of buildings when it is raining? I have often been asked this. If it rains, the external surfaces can be wet/damp. This causes evaporative cooling over the damp surface and this cooling can mask problems. For this reason it is best not to conduct surveys in the rain. Reports … Read More
Question “How often does thermography have to be done on our electrical system?” Answer; Firstly, In most countries thermography is not a legal requirement, however there are other reasons that it should be done. Some insurance companies require thermography to be done as part of their insurance requirements. They do this to mitigate losses. Their … Read More
This is an excellent question. A silvered mirror is a piece of glass, coated on one side with a very reflective metal. The silvered side with have an extremely low emissivity, but the other side is essentially glass, so its emissivity will be the emissivity for the glass, which should be high. Sometimes people use … Read More
Yet again it is the end of a fantastic week in Kuala Lumpur, thanks to all at Inframatrix, and an incredibly enthusiastic group of Thermography students. Best Wishes
An excellent question, the concept of temperature relates to the average speed of molecular movement. It is a relative measurement, letting us know simply that one object is hotter (or colder) than another object. The principle of temperature measurement is essentially linked to the so-called “Zeroth Law of Thermodynamics”. This curiously named law is … Read More
Students in KL, busy preparing reports as part of their Level 1 Thermography course. Taken with a T640.