TS ISO 10110-7

TS ISO 10110-7 is the part of the ISO 10110 series that deals with how surface imperfections are identified in drawings for optical elements and optical systems. In optics, surface quality affects more than appearance: it can influence image formation, light transmission or reflection, and the long-term durability of a component, so this part provides a structured way to describe such imperfections on technical drawings.

The standard specifies how to indicate the acceptable level of surface imperfections within a test region on individual optical elements and optical assemblies. The imperfections addressed include local surface flaws, edge chips, and long scratches, which are typical manufacturing or handling marks found on optical surfaces. Acceptance is expressed by considering both functional effects and cosmetic effects.

How the drawing notation is used

In general technical practice, a common notation for surface imperfections helps manufacturers, inspectors, and customers speak the same language. The impact of an imperfection depends on its size, location, count, and the intended use of the optical surface. For that reason, the standard allows permissible imperfections to be specified either by the area affected or by the visibility of the imperfections, giving users a practical way to describe quality expectations for different optical applications.

Scope and technical boundaries

• Applies to transmitting and reflecting finished optical surfaces.
• Covers optical elements whether coated or uncoated.
• Also applies to optical assemblies.
• Allows imperfection limits to be stated by affected area or by visibility.
• Considers both functional impact and cosmetic appearance.

This part supports more consistent drawing requirements for lenses, mirrors, windows, and similar components where optical performance is sensitive to surface condition. It helps turn surface-quality expectations into a drawing requirement that can be communicated and checked consistently.