Thermal footprints

With a good thermal infrared camera, we can explore phenomena that produce only small thermal changes in the environment. One example is the temperature change produce by our footprints when walking. When a shoe or foot contacts the floor, the floor is usually the cooler surface, and so the shoe […]

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Human infrared vision

When describing the visual spectrum range, most researchers (including myself) will describe it as spanning 400-700 nm, using round numbers as a convenience. Some will use the narrower region 420-680 nm, allowing only for the region where the eye’s sensitivity is reasonably high, while some use the expanded region 380-720 […]

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Introduction to the blog

Ever since I was a graduate student, I’ve spent time writing notes on technical articles and blog posts that I’ve found interesting. I tend to get interested in a lot of different subjects, and so these notes wander among the fields of mathematics and algorithms, optical design and optical physics, […]

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