ISO/TR 18476:2017 PDF

Name: ISO/TR 18476:2017 — Ophthalmic optics and instruments — Free form technology — Spectacle lenses and measurement
SKU: ISO/TR 18476:2017
Price: 25 EUR
Availability: InStock

Ophthalmic optics and instruments — Free form technology — Spectacle lenses and measurement

Название (английский):

ISO/TR 18476:2017

Ophthalmic optics and instruments — Free form technology — Spectacle lenses and measurement

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 30
Дата публикации:: 22 мая 2017 г.
Издание:: ISO TR 18476 edition 1 version 1
ICS:: 11.040.70

Тип поставки:

Full version450 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:5 раб. дн. (перевод)

Цена:450 €

Описание (английский):

ISO/TR 18476:2017 outlines all the steps from refraction to dispensing of spectacles, with particular attention to the benefits added by using free form technology, and provides a collection of relevant terms and descriptions. ISO/TR 18476:2017 does not contain the proprietary features of lens designs provided by suppliers.

Abstract

Похожие стандарты

Другие стандарты ISO

Overview

ISO/TR 18476:2017 - Ophthalmic optics and instruments - Free form technology - Spectacle lenses and measurement - is a technical report that documents the workflow from refraction to dispensing with a specific focus on the benefits, manufacturing methods and measurement practices associated with free form technology for spectacle lenses. The report explains terminology and provides guidance on classification, manufacturing processes, measurement and quality control, but does not include proprietary lens-design features supplied by commercial vendors.

Key topics and technical content

Definition of free form surfacing: description of computer-controlled CNC processes that create continuous, non-symmetrical 3‑D lens surfaces (e.g., single-point diamond turning and soft‑lap polishing) versus conventional spherical/toroidal surfacing.

Classification of free form lenses: front-surface, dual-surface and back-surface free form configurations (the report concentrates on full back-surface lenses).

Manufacturing workflows: comparison of conventional surfacing (blocking, generating, fining/smoothing, polishing) with modern free form surfacing steps and implications for production and process control.

Optical design and benefits: potential advantages such as optimization for individual prescriptions, reduction of oblique astigmatism, customization for as-worn position, frame size and wearer behaviour, and progressive‑power adaptations.

Measurement and quality control: guidance on surface-shape measurement, through‑power measurement, assessing conformity with standards, measuring the as‑worn position and inspection gates in manufacturing.

Supporting material: Annex A (typical dispensing flowchart), Annex B (measurement technology), Annex C (glossary of terms).

Practical applications and who uses it

ISO/TR 18476:2017 is intended for professionals across the ophthalmic optics supply chain who need to understand or implement free form technology:

Lens designers and optical engineers - to align design intent with surfacing and measurement capabilities.

Laboratory and manufacturing managers - for process selection, surfacing strategy (front/dual/back) and quality-control checkpoints.

Dispensing opticians and ophthalmic clinicians - to understand as‑worn measurement, customization options and fitting considerations.

Quality and compliance engineers - for verification methods (surface shape, through power) and inspection gate planning.

Equipment and metrology providers - to ensure measurement technologies support free form verification needs.

Related standards and resources

Prepared by ISO/TC 172 (Optics and photonics), Subcommittee SC 7 (Ophthalmic optics and instruments).

The report contains no normative references but includes a bibliography and normative guidance on measurement and verification practices (see Annex B and C).

Keywords: ISO/TR 18476:2017, free form technology, ophthalmic optics, spectacle lenses, lens measurement, free form surfacing, progressive lenses, as‑worn position, lens manufacturing, quality control.

ISO/TR 18476:2017 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical content

Practical applications and who uses it

Related standards and resources

Технические детали

ISO 8689-1:2000

Water quality — Biological classification of rivers — Part 1: Guidance on the interpretation of biological qu…

ISO/ASTM51540-04(2012)

Standard Practice for Use of a Radiochromic Liquid Dosimetry System (Withdrawn 2020)

ISO/ASTM51204-04

Standard Practice for Dosimetry in Gamma Irradiation Facilities for Food Processing (Withdrawn 2013)

ISO/ASTM51431-05

Standard Practice for Dosimetry in Electron Beam and X-Ray (Bremsstrahlung) Irradiation Facilities for Food P…

ISO/ASTM52628-20e1

Standard Practice for Dosimetry in Radiation Processing

ISO/ASTM52921-13(2019)

Standard Terminology for Additive Manufacturing—Coordinate Systems and Test Methodologies

ISO/ASTMTR52917-EB

Additive Manufacturing — Round Robin Testing — General Guidelines

ISO/ASTM52901-17(2023)

Standard Guide for Additive Manufacturing – General Principles – Requirements for Purchased AM Parts