ISO/TS 22247:2022 PDF

Name: ISO/TS 22247:2022 — Optics and photonics — Effective numerical aperture of laser lenses — Definition and verification procedure
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Optics and photonics — Effective numerical aperture of laser lenses — Definition and verification procedure

Название (английский):

ISO/TS 22247:2022

Optics and photonics — Effective numerical aperture of laser lenses — Definition and verification procedure

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 18
Дата публикации:: 27 апреля 2022 г.
Издание:: ISO TS 22247 edition 1 version 1
ICS:: 31.260

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Описание (английский):

This document covers terms, definitions, and a verification procedure to characterize the ability of laser lenses to collimate divergent laser beams and to focus collimated laser to small spot sizes. The aim of this document is to give users reliable information on the applicability of laser lenses in the field of beam forming.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO/TS 22247:2022 - "Optics and photonics - Effective numerical aperture of laser lenses - Definition and verification procedure" defines how to characterize a laser lens’s ability to collimate divergent beams or focus collimated beams to small spots. The technical specification gives terms, definitions, coordinate systems and a practical verification procedure that yields a reliable effective numerical aperture (NAeff) for laser lenses used in beam forming.

Key topics and requirements

Effective numerical aperture (NAeff): Defined as the sine of half the maximum divergence angle for which a nearly diffraction-limited beam can be collimated or focused without unacceptable aberration or more than 0.5 increase in beam propagation ratio.

Beam characterization metrics: Uses beam propagation ratio (M²), divergence angles and encircled-power/second-moment beam diameters consistent with ISO 11146-1.

Verification procedures: Provides methods to verify NAeff using:

Beam propagation ratio method (measures how lens affects M²), and
Residual divergence method (measures divergence after collimation).

Lens types covered: Rotationally symmetric lenses and cylindrical lenses (including long cylindrical lenses with sequential and parallel test procedures).

Probe laser requirements: Specifies acceptable probe beam characteristics (simple astigmatic beams, limits on M²) and orientation rules for cylindrical lenses.

Test reporting: Specifies mandatory test-report content - lens and probe laser details, measurement results (both methods), and lower limits for NAeff.

Practical applications

ISO/TS 22247:2022 is directly applicable wherever precise laser beam shaping and spot size control are required:

Lens manufacturers - for specification, production control and conformance statements of laser lenses.

Optical design and integration engineers - to select lenses for collimation, focusing and beam-forming applications.

Test and calibration laboratories - to perform reproducible verification of lens performance.

System integrators in industries such as laser material processing, microscopy, LiDAR, optical metrology and high-precision manufacturing - where reliable lens behavior affects system performance.

Related standards

ISO 11146-1 - Test methods for laser beam widths, divergence angles and beam propagation ratios; referenced for coordinate systems, M² definitions and beam-measurement foundations.

ISO/TS 22247:2022 provides a practical, standardized way to express and verify the effective numerical aperture of laser lenses, enabling consistent supplier specifications and informed component selection for beam-forming systems.

ISO/TS 22247:2022 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications

Related standards

Технические детали

SIST EN ISO 11146-1:2021

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