ASTM C1652/C1652M is the ASTM standard for measuring optical distortion in flat glass products using digital photography of grids. It provides a structured way to evaluate how glass affects the appearance of a grid pattern, helping users identify distortion that may influence visual quality and product acceptance. For manufacturers, specifiers, and quality teams, this standard supports more consistent testing and clearer communication when assessing flat glass performance.

ASTM C1652/C1652M standard overview

The ASTM C1652/C1652M standard overview centers on a digital photography method for measuring optical distortion in flat glass products. Based on the official title, the method uses grid images as the visual reference for evaluation, making it useful where appearance and distortion control matter. As an ASTM standard, it helps define a repeatable technical approach for comparing test results, supporting uniform assessment in inspection, product development, and acceptance-related workflows.

Where is ASTM C1652/C1652M used?

ASTM C1652/C1652M is commonly used in flat glass testing environments where optical appearance must be checked with consistency. It may be applied in laboratory or quality control settings that evaluate glass products by photographing a grid through or against the material. The method is relevant to workflows involving flat glass inspection, product comparison, and documentation of distortion behavior, especially when visual quality is part of the specification or buyer requirement.

Practical importance of ASTM C1652/C1652M

The practical value of ASTM C1652/C1652M is in helping teams measure distortion in a more controlled and repeatable way. That can support compliance efforts, product evaluation, procurement decisions, and internal quality control. Using a recognized ASTM test method may reduce ambiguity when comparing glass products or reviewing performance against a standard. For organizations that rely on visual clarity, it helps make testing and reporting more consistent.

• Digital photography of grid patterns
• Measurement of optical distortion
• Flat glass product evaluation
• Quality control and inspection support
• Technical comparison for acceptance decisions