I LED Detection Range with Night Vision Goggles?

AI Thread Summary
The discussion focuses on the detection capabilities of Gen 3 ANVIS9 night vision goggles (NVGs) concerning LED wavelengths, particularly in the 600-900 nm range. Participants seek clarity on how LED color temperatures, measured in Kelvin, correspond to the visible spectrum of 400-900 nm. It is noted that different types of LEDs emit light across various parts of the spectrum, with lower Kelvin numbers producing redder light. A suggestion is made to reference a chart that illustrates the relationship between the electromagnetic spectrum and temperature, although the effectiveness of such a chart for practical understanding is questioned. Overall, the conversation emphasizes the complexity of matching LED characteristics with NVG detection capabilities.
r971821
Messages
1
Reaction score
0
TL;DR Summary
Looking for info on LED lighting detection by Gen 3, anvis9 NVGs and others.
Hi:
Non-physicist here doing some research into detection ability of LED wavelengths by Gen3 anvis9 NVG. Have found that these NVG's optimize 600-900nm. Since LED are sold and measured in K, the conversion is not directly evident to me.
Is it possible to create a chart that might show where the roughly 400-900 nm visible spectrum lies with regard to degrees K for a lay person to understand?
 
Science news on Phys.org
I assume you're referring to 'white' LED's like those found in light bulbs for general illumination. These all emit light in various parts of the spectrum with each type of LED having a somewhat different spectrum. You could probably find the charts for each type with some effort, but in general, the lower the K number the redder the LED looks and the more light will be emitted in the red and orange end of the spectrum compared to the blue end.
 
r971821 said:
TL;DR Summary: Looking for info on LED lighting detection by Gen 3, anvis9 NVGs and others.

Is it possible to create a chart that might show where the roughly 400-900 nm visible spectrum lies with regard to degrees K for a lay person to understand?
Would the diagram in this link be sufficient for you? It starts with some general chat and then you get a pretty graph of irradiance over the EM spectrum against the absolute temperature. Equations follow. An LED attempts to reproduce a near enough black body spectrum at the temperature marked

LEDs vary from maker to maker and they all attempt to assign just one number to the apparent temperature. That may not be useful for you. In fact I'm not sure what you actually want to know and why.

Unless you actually know the spectrum of the LeD of interest and the frequency response of the detector then I don't think you will get an answer. But someone may have an idea.
 
Thread 'A quartet of epi-illumination methods'

Thread 'A quartet of epi-illumination methods'

Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
View full post »

Thread 'Effective absorption coefficient of gold nanoparticles'

I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
View full post »

Hot Threads

Recent Insights

Back
Top