SL3 Line & Dot Test Target

PURPOSE

The Line and Dot Micrometer Stage is designed for calibration of imaging systems used in precision measurement tasks. It provides reference features that allow users to verify pixel-to-distance conversion and detect errors caused by image processing algorithms such as pixel dithering. With a clearly structured grid of dot and line gratings, the slide supports accurate scaling, distortion mapping, and repeatability assessment in digital imaging environments including machine vision, metrology, microscopy, and automated inspection systems.

CONFIGURATION

• Material: Chrome on 75 × 75 × 1.5 mm Transparent Soda Lime Glass
• Material: Chrome on 100 × 100 × 1.25 mm White Diffuser Glass

PATTERN DESCRIPTION

The pattern features multiple 10 mm × 10 mm arrays of dots and lines, each spaced with a 5 mm gap between adjacent arrays. Dot arrays use a pitch equal to twice the dot diameter (e.g., 25 µm dots are placed at 50 µm centres). Line arrays follow the same principle, with pitch set to twice the line width (e.g., 50 µm lines at 100 µm centres).

The Standard Resolution target includes: 25 µm, 50 µm, 100 µm, 200 µm, 300 µm, 400 µm, 500 µm, 750 µm

The High Resolution target includes: 5 µm, 6 µm, 8 µm, 10 µm, 25 µm, 50 µm, 75 µm, 100 µm, 200 µm, 300 µm, 400 µm

Low-resolution PDF previews of the pattern are available for download in the DOWNLOAD tab.

MATERIAL

Soda Lime Glass is the most commonly used substrate for calibration targets due to its balance of optical quality and cost. It provides high flatness and minimal surface defects, with excellent UV transparency from 350 nm upwards. It has a thermal expansion coefficient of 93 × 10⁻⁷ (approximately 10 ppm) and 88% transmittance over the 375–750 nm range. Flatness class: 5 µm.

White Diffuser Glass is a semi-opaque soda lime glass with inherent diffusive properties, not reliant on coatings or laminations. It provides ~30% light transmission and is polished on both sides, producing near-Lambertian light transmission with slight surface specular reflection. Suitable for even illumination and use as a viewing screen or optical attenuator. Flatness class: 2 µm.

Anti-glare spray coatings are available to reduce surface reflectivity for reflected-light applications.

TURNAROUND

Standard production turnaround is 5 working days from receipt of order. Expedited services can be arranged for time-critical applications.

INSPECTION

All photomasks undergo a comprehensive inspection process. Key parameters such as Critical Dimension (CD) and feature uniformity are measured and recorded. High-magnification images (Nikon MM40 at 900×, OGP ZIP 300 at 400×) are stored with production data. For sectors requiring compliance documentation—such as medical or automotive—optional inspection certificates can be included with the order.

Standard: Full inspection performed; no documentation supplied.

Certificate of Conformance: Confirms compliance with internal inspection standards.

Certificate of Measurement: One line/dot width and one pitch dimension are verified for each array size. Additional features can be measured on request. CAD or marked drawing required.

Please see the TECHNICAL, DOWNLOAD, and FAQ sections for further information. If you still require clarification, please either email or click for LIVE SUPPORT.