ISO 10110-8-2019 PDF

Full title and description

ISO 10110-8:2019 — Optics and photonics — Preparation of drawings for optical elements and systems — Part 8: Surface texture. This part of the ISO 10110 series defines rules and notation for indicating surface texture (roughness and waviness) on technical drawings for optical elements, primarily for polished optics.

Abstract

This document specifies rules for the indication of the surface texture of optical elements, describing statistical surface parameters, spatial-frequency (band) considerations, and a method for characterizing the residual surface after detrending (removal of surface form). It is intended primarily for polished optics and applies to surfaces before coating unless otherwise stated. The control of surface form (covered in other parts of the series) is not specified in this part.

General information

• Status: International Standard — published; confirmed following a 2025 review (remains current).
• Publication date: November 2019 (Edition 3, 2019).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 37.020 (Optical equipment) / 01.100.20 (Mechanical engineering drawings).
• Edition / version: Edition 3 (2019).
• Number of pages: 23 pages (ISO published edition).

Scope

ISO 10110-8:2019 specifies how to indicate and document surface texture characteristics on drawings for optical elements and systems. It covers statistical descriptors of texture (e.g., Ra, Rq, Sa, Sq), sampling and bandwidth considerations, symbols and drawing conventions for polished and ground surfaces, and methods for expressing limits and test bands. It does not replace or specify surface-form tolerances (these are handled in other ISO 10110 parts).

Key topics and requirements

• Standardized drawing notation for surface texture (checkmark symbols with letters such as P for polished, G for ground, and P1–P4 grading for polishing levels).
• Definition and use of statistical roughness parameters (Ra, Rq, Sa, Sq) and selection of appropriate units (typically micrometres).
• Specification of spatial-frequency band (lower and upper cutoff wavelengths) for roughness/waviness measurement and the requirement to state the measurement bandwidth on drawings.
• Method for characterizing the residual surface after detrending by subtracting surface form (so that form errors are excluded from texture measurements).
• Guidance on application limits (primarily polished optics) and warnings about non-random textures from processes such as diamond turning or crystalline materials.
• Interoperability with other ISO 10110 parts (surface form, surface imperfection, coatings) — drawing callouts should reference the appropriate part where needed.

Typical use and users

Used by optical engineers, lens designers, drawing/detailing engineers, quality and metrology laboratories, optical manufacturers, and procurement/specification authors to unambiguously specify surface finish requirements on optical drawings so that manufacturing and acceptance testing align with design intent. Common in lens fabrication, precision polishing shops, and optical systems procurement.

Related standards

ISO 10110-8 is one part of the ISO 10110 series. Closely related parts include ISO 10110-1 (general rules), ISO 10110-5 (surface form tolerances), ISO 10110-7 (surface imperfections / scratch & dig), ISO 10110-12 and ISO 10110-19 (other form/inspection-related parts). Users typically apply multiple parts of ISO 10110 together when preparing complete optical drawings.

Keywords

Surface texture, roughness, waviness, Ra, Rq, Sa, Sq, spatial-frequency band, PSD, polished optics, drawing notation, ISO 10110, optical drawings.

FAQ

Q: What is this standard?

A: ISO 10110-8:2019 is the ISO standard that defines how to indicate and document surface texture (roughness and waviness) for optical elements on technical drawings. It provides symbols, parameter definitions, and measurement-band requirements for polished optical surfaces.

Q: What does it cover?

A: It covers rules for indicating surface texture on drawings, the statistical parameters used (e.g., Ra, Rq, Sa, Sq), how to state the measurement bandwidth and sampling lengths, and a method for characterizing the residual surface after removing form. It does not specify surface-form tolerances (see ISO 10110-5).

Q: Who typically uses it?

A: Optical designers, CAD/drawing specialists, lens and optics manufacturers, polishing shops, inspection and metrology laboratories, and purchasing/specification engineers use this part to ensure consistent surface-finish specifications and testing.

Q: Is it current or superseded?

A: ISO 10110-8:2019 (Edition 3) was published in November 2019 and, according to ISO’s review records, was reviewed and confirmed in 2025 — therefore this edition remains the current published version. It replaced ISO 10110-8:2010.

Q: Is it part of a series?

A: Yes — ISO 10110-8 is part of the ISO 10110 series, which standardizes drawing indications for optical elements and systems; other parts cover general rules, surface form tolerances, surface imperfections, coatings, etc. For example, ISO 10110-1 (general) and ISO 10110-5 (surface form tolerances) are commonly used together with part 8.

Q: What are the key keywords?

A: Key terms are surface texture, roughness, waviness, Ra, Rq, Sa, Sq, spatial-frequency band, PSD, polished, drawing notation, and checkmark symbol (P/G). These reflect the standard’s focus on statistical surface descriptors and drawing callouts for optical surfaces.