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BS ISO 13653:2019

BS ISO 13653:2019

$142.49

Optics and photonics. General optical test methods. Measurement of relative irradiance in the image field

Published By Publication Date Number of Pages
BSI 2019 24
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This document specifies general optical test methods for the measurement of the relative irradiance in the image field.

This document is applicable to optical imaging systems in the optical spectral region from ? = 100 nm to ? = 1 ?m. Theoretical reflections and the comparison with the calculation apply only to optical systems. This document is applicable to rotationally invariant and rotationally variant systems; anamorphic systems, for example, are included.

Telescopic systems are also included. The title of this document refers to the relative irradiance in the image field, but this document is also applicable to determination of the relative radiant power.

NOTE

For telescopic systems, it is suitable to state only the radiant power; for most imaging systems, the conversion from radiant power to irradiance is easy.

As far as measurements are concerned, this document is also applicable to electro-optical systems.

The two methods described differ particularly in the influence of veiling glare.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Quantities, symbols and units
5 Designation
11 6 Description of measurement procedures
6.1 Factors influencing the relative irradiance
6.1.1 General
6.1.2 Natural fall-off in brightness, Fnat = cos4ωp (cos4 law)
6.1.3 Relative pupil surface, Fp(ωp)
6.1.4 Vignetting, Fvig(ωp)
6.1.5 Influence of the transmission, FT(ωp)
6.1.6 Change in size of the image surface element due to distortion
12 6.1.7 Resulting relative irradiance
6.2 Classification of the measurement procedures
6.3 Brief description of the irradiance measurement
6.4 Brief description of the radiant power measurement
13 7 Measurement of relative irradiance
7.1 Description of the measuring set-up
7.1.1 Source of radiation
7.1.2 Test specimen holder
7.1.3 Measuring system
14 7.2 Measurement
7.2.1 Adjustment of the measuring set-up
7.2.2 Spectral region
7.2.3 Determination of measurement value
15 7.2.4 Selection of image heights and image-space pupil field angles
8 Measurement of radiant power
8.1 Description of the measuring set-up
8.1.1 Source of radiation
8.1.2 Adjusting elements
16 8.1.3 Measuring system
8.2 Measurement
8.2.1 Adjustment of the measuring set-up
17 8.2.2 Spectral region
8.2.3 Determination of the measurement value
8.2.4 Selection of the object-space pupil field angles
9 Presentation of results
9.1 Tabular form
18 9.2 Graphical representation
9.2.1 Curves of measured values
9.2.2 Curves of equal relative irradiance
10 Test report
19 11 Examples
11.1 Measurement of relative irradiance by procedure A1 (see Figure 4, Table 4)
11.2 Example of the representation of curves of equal relative irradiance against the image field (see Figure 5)

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BS ISO 13653:2019
$142.49