ISO 14490-7:2016 PDF

Optics and photonics — Test methods for telescopic systems — Part 7: Test methods for limit of resolution

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Title (English):

ISO 14490-7:2016

Optics and photonics — Test methods for telescopic systems — Part 7: Test methods for limit of resolution

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 10
Publication date:: November 14, 2016
Edition:: ISO IS 14490 edition 2 version 1
ICS:: 37.020

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Description (English):

ISO 14490-7:2016 specifies the test methods for the determination of the limit of resolution of telescopic systems and observational telescopic instruments.

Technical details

Technical committee: ISO/TC 172/SC 4 - Telescopic systems
SKU: ISO 14490-7:2016

Abstract

Overview

ISO 14490-7:2016 - "Optics and photonics - Test methods for telescopic systems - Part 7: Test methods for limit of resolution" defines standardized procedures to measure the limit of resolution of telescopic systems and observational telescopic instruments. The standard specifies test arrangements, required test equipment, measurement procedures, calculation methods and reporting requirements to determine the minimum angular separation at which adjacent bars in a bar‑type resolution target can be distinguished.

Key topics and technical requirements

Test concept: Uses a bar‑type resolution test target placed at the focal plane of a collimator to produce a collimated image for the test specimen (telescope or observational instrument).
Resolution definition: The limit of resolution is the minimum angular distance between centrelines of adjacent bright (or dark) bars that can be detected through the test specimen.
Essential equipment & setup:
- Collimator lens with diameter ≥ 1.2 × entrance‑pupil diameter of the test specimen and focal length ≥ 5 × objective focal length.
- Bar‑type resolution test target (glass plate with vertical, horizontal and ±45° patterns) mounted at the collimator focal plane.
- Uniform illumination (correlated colour temperature 5 000–6 000 K; mean illuminance uniformity ±5% Peak-to‑Valley).
- Optional auxiliary telescope; magnification must not reduce the system exit pupil below 0.8 mm. Guidance given when auxiliary telescope is unnecessary (e.g., angular limit worse than 2′–3′ and exit pupil

Related standards

Other ISO standards

Overview

Key topics and technical requirements

Test concept: Uses a bar‑type resolution test target placed at the focal plane of a collimator to produce a collimated image for the test specimen (telescope or observational instrument).
Resolution definition: The limit of resolution is the minimum angular distance between centrelines of adjacent bright (or dark) bars that can be detected through the test specimen.
Essential equipment & setup:
- Collimator lens with diameter ≥ 1.2 × entrance‑pupil diameter of the test specimen and focal length ≥ 5 × objective focal length.
- Bar‑type resolution test target (glass plate with vertical, horizontal and ±45° patterns) mounted at the collimator focal plane.
- Uniform illumination (correlated colour temperature 5 000–6 000 K; mean illuminance uniformity ±5% Peak-to‑Valley).
- Optional auxiliary telescope; magnification must not reduce the system exit pupil below 0.8 mm. Guidance given when auxiliary telescope is unnecessary (e.g., angular limit worse than 2′–3′ and exit pupil

ISO 14490-7:2016 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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