BS IEC 61745:1998

Foreword
1 General
1.1 Scope and object
1.2 Definitions
1.3 Geometrical parameters of optical fibres
1.4 Description of geometry test sets
1.5 Calibration standard requirements
2 Calibration
2.1 Introductory remark
2.2 Rationale for calibration of geometry test sets
2.3 Calibration procedure
2.4 Check calibration procedure
2.5 Spatial linearity
2.6 Calibration of core/cladding concentricity error measurement
2.7 Calibration of non-circularity measurement
3 Evaluation of uncertainties
3.1 Introductory remark
3.2 Evaluation of uncertainty in test set calibration
3.3 Evaluation of uncertainty in fibre measurement
3.4 Evaluation of uncertainty in chromium mask measurement
3.5 Summary
4 Documentation
4.1 Records
4.2 Certificate of calibration
4.3 Sample calibration certificate
Figure 1 - Example of a calibration chain and the accumulation
           of uncertainties
Annex A (informative) Derivation of calibration factors
Annex B (informative) Worked examples for the determination of
                      calibration factors
Annex C (normative) Calculation of uncertainties
Annex D (informative) Worked examples for the determination of
                      uncertainties
Annex E (informative) Generation of working standards
Annex F (informative) Estimation of uncertainty in the measurement
                      of core/cladding concentricity error
Annex G (informative) Estimation of uncertainty in the measurement
                      of non-circularity

Defines the calibration of test sets which perform end-face image analysis, also known as near-field or grey-scale analysis. Applicable to test sets of a different type. Covers the calibration of measurements made on single-mode fibres only, this test set may also be used to measure the geometrical parameters of the cores of multimode fibres, but the evaluation of uncertainties associated with these measurements is beyond the scope of this standard.