GB/T 45410.5-2026Optics and photonics - Test methods for telescopic systems - Part 5: Transmittance (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 5 of GB/T 45410, "Test Methods for Optical and Photonic Telescope Systems". GB/T 45410 has been issued.

The following parts were laid out.

---Part 1: Basic Characteristics;

---Part 2: Binoculars;

---Part 3: Aiming the Telescope;

---Part 5: Transmittance;

---Part 7: Limiting Resolution.

This document is equivalent to ISO 14490-5:2021 "Optical and photonic telescope systems – Test methods – Part 5: Transmittance tests".

method".

The following minimal editorial changes have been made to this document.

---To harmonize with existing standards, the standard name has been changed to "Test Methods for Optical and Photonic Telescope Systems - Part 5: Transmission".

Emission rate.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Standardization of Optics and Photonics (SAC/TC103).

Introduction

The telescope system is the core component of various telescopes and is widely used in astronomical observation, space remote sensing, geodesy, weaponry, and education.

In fields such as sports, cultural entertainment, and tourism, the applications of telescopes are expanding daily. With advancements in science and technology and socio-economic development, the range of applications for telescopes is increasingly broadening.

Large-scale production and output have gradually increased, and the industry has reached a considerable scale.

With the rapid development of various telescope system technologies both domestically and internationally, the experimental methods for the transmittance of telescope systems and observation telescopes have also evolved.

The accuracy of the information presented in the test report is crucial to the standard setting, technical document preparation, textbook and publication writing, and design of telescope system products.

The uniformity and accuracy of technical language in design, manufacturing, and quality assessment affect the development and standardized description of the entire telescope system.

major.

For the reasons mentioned above, and based on the technical and operational characteristics of the telescope system, a test method for the transmittance of the telescope system and the observation telescope is proposed.

It is essential to standardize and regulate the expression of information in test reports.

GB/T 45410 "Test Methods for Optical and Photonic Telescope Systems" is proposed to consist of ten parts.

---Part 1: Basic Characteristics. The purpose is to specify the test methods for the technical parameters of the telescope system.

---Part 2: Binoculars. The purpose is to specify test methods for the technical parameters of binocular systems.

---Part 3: Aiming Telescope. The purpose is to specify the test methods for the technical parameters of aiming telescope systems.

---Part 4: Astronomical Telescopes. The purpose is to specify test methods for the technical parameters of astronomical telescope systems.

---Part 5: Transmittance. The purpose is to specify the test methods for the technical parameters of a telescope system.

---Part 6: Glare Shielding Index. The purpose is to specify the test methods for the technical parameters of telescope systems.

---Part 7: Limiting Resolution. The purpose is to specify the test methods for the technical parameters of a telescope system.

---Part 8: Night Vision Devices. The purpose is to specify the test methods for the technical parameters of night vision device systems.

---Part 9: Field Curvature. The purpose is to specify the test methods for the technical parameters of a telescope system.

---Part 10: Axial Color Properties. The purpose is to specify test methods for the technical parameters of telescope systems.

Test methods for optical and photonic telescope systems Part 5: Transmittance

1 Scope

This document specifies the test methods for the transmittance of telescope systems and observation telescopes.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

ISO/CIE 11664-1.2019 Colorimetry - Part 1: CIE Standard Colorimetry Observer Note. GB/T 20147.1-2026 Colorimetry – Part 1: CIE Standard Colorimetric Observer (ISO/CIE 11664-1.2019, MOD) ISO/CIE 11664-2 Colorimetry - Part 2: CIE standard illuminants Note. GB/T 20147.2-2026 Colorimetry – Part 2: CIE Standard Illuminants (ISO/CIE 11664-2.2022, MOD) ISO 14132-1 Optical and Photonic Telescope Systems Terminology Part 1: General Terminology and Alphabetical Sequences of ISO 14132 Terminology Note. GB/T 44403-2024 General Terminology for Optical and Photonic Telescope Systems and Binoculars, Monoculars, Observation Mirrors and Aiming Telescopes Terminology (ISO 14132-1:2015, ISO 14132-2:2015, ISO 14132-3:2021, MOD) ISO 14490-1:2005 Optics and optical instruments - Test methods for telescope systems - Part 1: Test methods for fundamental characteristics) Note. GB/T 45410.1-2025 Optical and photonic telescope systems – Test methods – Part 1: Fundamental characteristics (ISO 14490-1:2005, MOD) Note. There are no technical differences between the content cited in CIE018.2019 and the content cited in CIE18.2.1983.

3 Terms and Definitions

The terms and definitions defined in ISO 14132-1 apply to this document.

The URLs for the terminology databases maintained by ISO and IEC for standardization are as follows.

4 General Rules

To determine the spectral transmittance tau(lambda), the radiative flux of a finite beam of light before entering and after passing through the optical system will be measured.