FopticalB

FopticalB is a hypothetical parameter used in optical-system modeling to denote the baseline transmission efficiency associated with a configuration labeled B. It is a dimensionless quantity that abstracts the cumulative effect of material transmittance, coatings, and alignment losses for that configuration.

In practice, FopticalB is used within broader throughput models. For example, the total optical throughput T of a multi-element system might be written as T = FopticalA × FopticalB × FopticalC, where each factor represents a distinct configuration or path. FopticalB encapsulates wavelength dependence, incidence angle, and surface quality, and can vary across the spectral range.

Applications and context include theoretical discussions and simulation tutorials in optics, photonics, and imaging. It helps compare baseline performance between alternative configurations, such as different coatings or tolerancing scenarios. It is not a standardized physical constant; definitions and ranges differ by study and by author.

Origin and usage notes: The term is commonly used in educational contexts and in some open-source toolkits as a didactic variable. It is often paired with FopticalA and FopticalC to illustrate how sequential optical stages contribute to overall throughput, and it may be described differently in various models or software packages.

See also: FopticalA, FopticalC, optical throughput, transmittance, spectral response.