ISO 8980-4-2006 PDF

Full title and description

St ISO 8980-4-2006 — Ophthalmic optics — Uncut finished spectacle lenses — Part 4: Specifications and test methods for anti-reflective (AR) coatings. The standard specifies optical and non‑optical performance requirements, durability/adhesion tests and laboratory measurement methods applicable to AR coatings applied to uncut finished spectacle lenses.

Abstract

ISO 8980-4:2006 defines type-test methods and acceptance criteria for anti‑reflective coatings on spectacle lenses, including spectral and luminous reflectance measurement procedures, usable coated-area requirements, durability and rubbing tests, and documentation obligations for manufacturers. The standard explicitly excludes transmittance/absorptance and the colour of reflected light.

General information

• Status: Published.
• Publication date: August 2006.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 11.040.70 (Ophthalmic optics and instruments).
• Edition / version: Edition 2 (2006).
• Number of pages: 18 pages.

(ISO/TC 172/SC 7 is the technical committee responsible for this series of standards.)

Scope

Applies to anti‑reflective coatings on uncut finished spectacle lenses and specifies optical measurement methods (spectral and luminous reflectance), allowable coated area, durability/adhesion tests (environmental cycling + rubbing), acceptance criteria and related test conditions. It does not cover spectral transmittance/absorptance nor the colour of reflected light.

Key topics and requirements

• Spectral reflectance measurement: specified spectral range 380–780 nm, wavelength step ≤ 5 nm and spectral bandwidth (FWHM) ≤ 5 nm; use of a dual‑ or single‑beam spectrophotometer with incident angle ≤ 17°. Measurement uncertainty and instrument calibration requirements are stated.
• Luminous and mean reflectance: methods to calculate luminous reflectance (ρV) and mean reflectance (ρM) are given; when measured as specified, luminous reflectance is required to be below defined limits (example limit: ρV < 2.5% for the procedure in the standard).
• Calibration and reference specimens: use of an uncoated calibration specimen matched in curvature (within about 0.50 D) and with known refractive index (uncertainty Δn < 0.001) to derive lens spectral reflectance.
• Usable coated area: formula and requirement for usable coated diameter on uncut lenses (manufacturer nominal diameter minus allowance; commonly expressed as W(d − 4) mm, where d is the nominal lens diameter).
• Durability and adhesion testing: defined environmental cycling (temperature, humidity and light exposure) combined with standardized rubbing sequences; acceptance criteria require consecutive test specimens (typically five) to show no significant loss of adhesion. Failure modes and inspection conditions (central inspection zone, delamination limits) are specified.
• Test conditions and timing: at least 24 hours after coating before testing and controlled storage/conditioning (for example 20–26 °C) are required; documentation of spectral reflectance curves and stated reflectance values must be available from the manufacturer on request.

Typical use and users

Used by spectacle‑lens manufacturers, coating suppliers, optical testing laboratories, quality assurance teams, opticians and regulatory bodies to define and verify AR coating performance on uncut finished lenses. Test labs and manufacturers use the standard for type testing, specification compliance and product documentation.

Related standards

Other parts of the ISO 8980 series (e.g., Parts 1, 2, 3 and 5) cover finished‑lens terms, power‑variation lenses, transmittance specifications and abrasion‑resistant surfaces; ISO 13666 (calculation of luminous quantities) and ISO 14889 (test methods referenced for finished lenses) are commonly referenced. Work updating ISO 8980‑4 has also been progressed to include hydrophobic coating properties in a newer draft.

Keywords

anti‑reflective coating, AR coating, spectacle lens, uncut finished lens, spectral reflectance, luminous reflectance, durability testing, adhesion, rubbing test, ophthalmic optics.

FAQ

Q: What is this standard?

A: ISO 8980‑4:2006 is an international standard that specifies measurement methods, performance limits and durability/adhesion tests for anti‑reflective coatings applied to uncut finished spectacle lenses.

Q: What does it cover?

A: It covers spectral and luminous reflectance measurement procedures, calibration and instrumentation requirements, usable coated area, durability (environmental + rubbing) tests and acceptance criteria. It does not address lens transmittance/absorptance or the colour of reflected light.

Q: Who typically uses it?

A: Spectacle‑lens manufacturers, coating suppliers, accredited test laboratories, product compliance and quality teams, opticians and standards/regulatory organizations use this standard to specify and verify AR coating performance.

Q: Is it current or superseded?

A: The published edition is ISO 8980‑4:2006 (Edition 2). ISO metadata indicates the 2006 edition is published and that the document has been placed under review with a revision activity (work to update the part, including additions for hydrophobic coatings, has been progressed as a draft). Users should check the national/ISO catalogue for any newer formal revisions or consolidations before relying on it for regulatory compliance.

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 8980 series (Ophthalmic optics — Uncut finished spectacle lenses). Other parts address terminology and basic requirements, power‑variation lenses, transmittance and surface abrasion resistance.

Q: What are the key keywords?

A: Anti‑reflective coating, reflectance measurement, spectral reflectance, luminous reflectance, adhesion, durability testing, spectacle lenses, ophthalmic optics.