Photonics Dictionary: S

An aperture consisting of a semitransparent central region whose amplitude transmittance only is varied, and the relative phase difference between the central and annular region is fixed as p -...

A television system that uses a slow rate of horizontal scanning to increase its reproduction and transmittance accuracy of printed matter, photographs and illustrations.

The spatial distribution of incident and collected flux contained in the analysis of reflectance, transmittance or densities.

Average wavelength usually determined for light-transmitting devices by taking a weighted average for each wavelength of the spectral energy distribution of incident light, transmittance of the...

A wavelength region of relatively high transmittance, surrounded by regions of low transmittance.

A spectrophotometer is a scientific instrument used to measure the intensity of light at various wavelengths in the electromagnetic spectrum, typically in the visible and ultraviolet regions. It is...

The detection and measurement of spectral reflectance, spectral transmittance or relative spectral emittance, relative to wavelength.

See regular transmittance; the term specular is not properly applied to transmission.

The observed time dependence of the transmittance of a step of radiation through a given medium.

A viewer that uses the transmittance of polarized light through glass or a similar medium to examine strained regions. See polariscope.