Tech Tips
Planck's Blackbody Curve
What is Emissivity?
All objects and materials do not radiate infrared energy equally. Emissivity is a term describing the efficiency with which a material radiates infrared energy. A blackbody has an emissivity of 1.00 and no other material can radiate more thermal energy at a given temperature. An object with an emissivity of 0 emits no infrared energy. Real-world objects have emissivity values between 0 and 1.00. The lower emissivity of most real-world materials reduces the intensity of radiation from the theoretical predictions of Planck’s Law.
Mid-Wavelength Camera
The MW640-15 is Optotherm’s most sensitive thermal imaging camera, providing spatial resolution down to 2μm and captures images at 100Hz. Due to the camera’s high image capture rate, lock-in tests can be performed with test frequencies up to 25Hz, reducing thermal diffusion and improving fault location. Because silicon is partially transparent in the MWIR range, features and metallization can be observed when testing devices from the backside. The MW640-15 camera also provides the ability to see through window materials commonly used in chip testing, such as silicon carbide.
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