Sometimes we need a non-contact liquid level sensor. There are several ways to build that, but the easiest is to try an optical liquid level sensor. You may already have an idea in mind since you are ...

Tunable filters are optical filters that are suitable for applications requiring wavelength tuning. Two of their main specifications are the optical density (OD) and the out-of-band rejection. The ...

Several light sources produce light across various wavelengths. While this wavelength spectrum can be useful in lighting applications, other applications require light with a restricted visible ...

Spectral-splitting CPV-T collector design. (a) Cross-sectional view; (b) 3-D view. (The PV cells are on the two sloped, flat sides of the central primary PV-T channel.) Conventional ...

Nano–soft hybrid materials combine the structural precision of nanotechnology with the adaptability of soft matter such as liquid crystals.