What is refractive index?

What is refractive index?

The refractive index (also known as the index of refraction) is defined as the quotient of the speed of light as it passes through two media. It is a dimensionless number that depends on the temperature and wavelength of the beam of light. “Refractive index describes...
The Complete Guide to Non-Imaging Optics

The Complete Guide to Non-Imaging Optics

Non-imaging optics, also known as anidolic optics, is the branch of optics concerned with optimal light transference between a source and a target. Unlike imaging optics the techniques used for non-imaging optics do not form an image of the source. Non-imaging optics...
Optics materials: Glass versus Polymers

Optics materials: Glass versus Polymers

Optical elements are made from various kinds of materials. Optical materials are usually transparent models, meaning materials with good light transmission in some spectral ranges with little absorption or scattering of light. However, absorption could also be used...