There are both the simplest models on the thermal imaging lenses market that are ready to use immediately after the start button is pressed, as well as more complex specialized devices.
We advise you to choose a device with good overall specs , so you don’t have to buy another one in the future just to provide some new features. However, since an infrared camera are a universal instrument for measuring temperature and analyzing thermal fields, you may be very tempted to use it for a maximum number of measuring and diagnostic tasks. This is the first thought you should get rid of when choosing a camera. When you buy a thermal imaging lenses, the first thing you should clearly see is the main areas of its further application, the second is to decide on the budget.
Let’s take a brief look at devices by area of application.
Field of view
This is a parameter of the thermal imaging lenses that describes the size of space when taking a photo of an object. Most often it is measured in degrees. Simple geometry is used to calculate the basic field of view parameters. The smaller is the field of view angle, the further you may move away from the object without loss of image quality.
The bigger the field of view, the better the thermal imager works.
Zoom Capacity
Optical multiplicity and digital zoom are used to obtain a detailed image of objects at a great distance. Optical multiplicity for portable thermal imaging lenses usually does not exceed 4-5x, and digital zoom – 2x/4x/8x. On average, you can increase the ratio to 20x. The minimum multiplicity provides a wide field of view and displays the real size of the target.
Resolution and pixel size
The main parameter of the thermal imaging lenses determines its sensitivity and image quality. The larger the size and resolution of the sensor, the more temperature points are displayed. At a resolution of 160×120 pixels, a thermogram of 19,200 pixels is displayed, and at a resolution of 320×240 – 76,800. The maximum value for commercially available thermal imaging lenses – 640×480 pixels, forming a picture of 307 200 points.
Wavelength
A spectrum of thermal radiation – invisible infrared range – 780-100 thousand nm wavelength.
You should therefore pay attention to the wavelength when purchasing a thermal imaging lenses. It is important to realize that the bigger the wavelength, the better your thermal imaging lenses will perform.