What is the maximum degree of a beam splitter

A beam splitter can produce two or more output levels, with some designs allowing continuous adjustment of the splitting ratio between transmitted and reflected beams.Basic FunctionalityBeam splitters are optical devices that divide an incident light beam into two or more beams, which may differ in optical power, polarization, or wavelength . Standard beam splitters typically have two output levels: one transmitted and one reflected. The distribution of light between these outputs is defined by the splitting ratio, such as 50/50, 70/30, or other fixed ratios .Variable and Continuous LevelsSome beam splitters are designed to allow continuous adjustment of the output levels. This can be achieved using:Rotating disks with gradient coatings, where the local reflectance changes with the angular position, allowing smooth tuning of the transmitted and reflected power .Combination of a rotatable half-wave plate and a polarizing beam splitter, which adjusts the polarization of the input beam relative to the splitter axes, continuously controlling the power distribution according to Malus' law . These methods enable a continuous range of current or optical power levels rather than discrete steps, making them suitable for precision optical experiments and laser systems.Multi-Beam and Dichroic SplittersBeam splitters can also separate light into more than two beams based on wavelength (dichroic splitters) or polarization (polarizing splitters). Multi-band dichroic splitters can have three or more transmission/reflection bands, effectively creating multiple output levels for different spectral components .SummaryStandard beam splitters: 2 output levels (transmitted and reflected).Variable beam splitters: continuous adjustment between two outputs.Dichroic or multi-band splitters: 3 or more output levels based on wavelength.Polarizing splitters: separate beams by polarization, effectively creating multiple levels for polarized light components . Thus, the number of current levels a beam splitter can use depends on its type and design, ranging from two fixed outputs to multiple adjustable or wavelength-dependent outputs.