GOST 11141-84 PDF

Full title and description

GOST 11141-84 — "Optical parts. Classes of cleanness of optical surfaces. Methods of control" (Russian: "Детали оптические. Классы чистоты поверхностей. Методы контроля"). The standard defines classes of surface cleanliness for optical components (glass, crystals, sitalls, polymeric materials, optical ceramics, metals and fiber‑optic products) and establishes methods for inspection and control of surface defects such as scratches and points, including requirements tied to surface roughness after mechanical, ion and other processing and coating operations.

Abstract

This national standard (GOST) establishes classification criteria and test/inspection methods to assess and control the cleanness (scratch/dig and point defects) of optical surfaces used in precision optics and fiber‑optic components. It is intended to provide uniform acceptance criteria and measurement procedures for manufacturers and quality laboratories.

General information

• Status: Active (in force / действующий).
• Publication date: Designation year 1984; brought into force 01 January 1985.
• Publisher: Originally published under the USSR state standards system (Gosstandart); maintained in the Russian national standards catalog (Rosstandart / Interstandard listings).
• ICS / categories: Optics and optical instruments — ICS 37.020 (classification related to optical parts and control methods).
• Edition / version: GOST 11141-84 (original 1984 designation); amendments and updates recorded in subsequent published amendments (examples cited in standards catalogs include amendments in 1989–1990).
• Number of pages: Listed as 23 pages in several national catalogs (some commercial copies list 23–24 pages depending on cover/annex pagination).

Scope

The standard applies to optical parts made of glass, crystals, sitalls, polymeric materials, optical ceramics, metals and fiber‑optic products. It sets classes of cleanliness for polished optical surfaces (based on permissible sizes, numbers and locations of scratches and points/digs) and specifies methods of visual and instrumental control for acceptance, incoming inspection and quality control of finished optical components with typical surface roughness parameters (Rz) not exceeding specified limits after processing and coating.

Key topics and requirements

• Definition of surface cleanliness classes for optical parts (classification by permissible scratch and point/dig defects and their distribution on the surface).
• Inspection and control methods — visual inspection procedures, reference comparison charts and instrumental checks appropriate for production inspection and acceptance testing.
• Quantitative acceptance criteria tied to defect size, count and location, and guidance on sampling and area assessment.
• Surface roughness considerations and limits for applied criteria (document references surface quality after mechanical, ion and other treatments and coatings).
• Application notes for various materials used in optical parts (glass, crystals, polymers, ceramics, metals and fiber‑optic elements).

Typical use and users

Manufacturers of optical components (lenses, prisms, windows, fiber‑optic elements), optical coatings producers, incoming inspection and quality assurance laboratories, metrology and test labs in optics and photonics, plus design and procurement groups in aerospace, scientific instrumentation, medical optics and defense sectors use this standard to set and verify surface quality acceptance criteria.

Related standards

GOST 11141-84 is commonly referenced alongside other national GOST standards covering optical materials, environmental/modification categories and related test methods (for example standards on climatic categories, material specifications and related optical testing standards). Individual product standards (e.g., spectacle lens specifications and other optics GOSTs) may reference GOST 11141-84 for surface‑cleanness requirements.

Keywords

optical parts; surface cleanliness; scratch; dig; point defects; inspection methods; surface roughness; Rz; optical components; quality control.

FAQ

Q: What is this standard?

A: GOST 11141-84 is a national standard that defines classes of cleanness for optical surfaces and prescribes methods of control and inspection for optical parts.

Q: What does it cover?

A: It covers classification criteria (permissible sizes, counts and locations of scratches and points/digs), inspection and control procedures, and applicability to a range of optical materials and components.

Q: Who typically uses it?

A: Optical component manufacturers, coating shops, quality and metrology laboratories, procurement and design teams in optics, photonics, aerospace, medical optics and related industries.

Q: Is it current or superseded?

A: The standard is listed as active/current in national catalogs and commercial standards databases; amendments and updates have been recorded in catalogs, so users should check the latest national catalog entry or publisher notice for any recent revisions or replacement documents before application.

Q: Is it part of a series?

A: It is part of the body of GOST standards covering optics and optical instruments and is frequently cited by related product and test standards; it should be used together with material‑specific and environmental GOSTs when specifying acceptance and test regimes.

Q: What are the key keywords?

A: Optical parts, surface cleanliness, scratch/dig classification, inspection methods, surface roughness (Rz), optical materials.