IEVref: | 731-03-86 | ID: | |

Language: | en | Status: Standard | |

Term: | maximum theoretical numerical aperture | ||

Synonym1: | NA<sub>max th</sub> [Preferred] | ||

Synonym2: | |||

Synonym3: | |||

Symbol: | |||

Definition: | a theoretical value of numerical aperture calculated using the values of refractive index of the core and cladding given by:
${\left({n}_{1}^{2}-{n}_{2}^{2}\right)}^{1/2}$ where | ||

Publication date: | 1991-10 | ||

Source | |||

Replaces: | |||

Internal notes: | 2016-01-22: The en and fr equations are different in the standard. NA<sub>max th</sub> in the en transferred as a synonym in line with 731-03-85 and since it is not presented as a variable. JGO 2017-06-02: Cleanup - Remove Attached Image 731-03-86.gif | ||

CO remarks: | |||

TC/SC remarks: | |||

VT remarks: | |||

Domain1: | |||

Domain2: | |||

Domain3: | |||

Domain4: | |||

Domain5: |

${\left({n}_{1}^{2}-{n}_{2}^{2}\right)}^{1/2}$

where *n*_{1} is the maximum refractive index of the core, and *n*_{2} is the refractive index of the innermost homogeneous cladding