What is Reflected Apparent Temperature?

What is Reflected Apparent Temperature?

Reflected apparent temperature is basically unwanted radiation.

When you’re using your IR camera to measure the temperature of a specific object, it not only “sees” the radiation that object emits by itself, but also the radiation from all around, bouncing off it.

That other radiation affects the way the camera views your target object – net result: an inaccurate temperature reading.

Without compensation for reflected apparent temperature from the units on the left, the temperature of the unit on the right would appear much higher.

How does reflected apparent temperature work?

You’ll need to pay attention to reflected apparent temperature in situations where the radiation emitted by your target differs from the radiation emitted by its surroundings, such as a warm object in a cold environment – or vice versa.

That’s especially true if the surface of your target object has a low emissivity.

How is reflected apparent temperature used?

To capture the true temperature reading of any target object, the thermal imaging camera needs to compensate for that unwanted radiation it sees all around it.

It does so by calculating the energy reflected by that object, based on its reflected apparent temperature reading.  This reading can be taken in a number of ways, including using the IR camera to measure the radiation actually heading towards the target object – in much the same way photographers use their light meters.

The camera then deducts the value of that reflected energy from the value of the total energy picked up by its lens, which includes all the unwanted radiation.

In this way it gives an accurate reading of the energy emitted from the target object – i.e. its temperature.

Thermal Imaging Training Courses

However, getting a correct temperature reading isn’t just a case of looking at a strangely-coloured image and instantly coming to a conclusion:  the hallmarks of a good professional thermographer are careful thought about the situation, correct setup of the equipment to produce an image containing the appropriate information, accurate analysis of that information and the ability to effectively communicate that analysis to the client.

If you’re interested in a career in any kind of thermal imaging, you’ll need the right kind of training to gain the right qualifications and certifications.

And after taking any of the many specialist thermal imaging courses available from the iRed Academy, you’ll know how exactly to approach a problem situation, how to set up your thermal imaging equipment to produce the right kind of image, how to analyse the image produced and how to explain that analysis in order to provide the client with a solution to their problem.

Talk to us about the kind of thermography career you’re interested in, and we’ll help get you started, get trained, and get qualified.

2018-09-17T14:20:53+00:00September, 2018|Knowledge Base|

About the Author:

iRed is the UK’s largest provider of thermal imaging courses and specialist drone operator training. In operation since 2002, before thermal imaging had been accepted as a mainstream inspection tool, iRed has always delivered industry-leading training that’s regularly updated to meet current commercial needs.
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