LBTEK Reticle is fabricated by depositing a high-reflectivity chrome coating onto UV-grade fused silica. Since reticles are often integrated into eyepieces of imaging systems to superimpose a reference pattern onto the observed object, and are most commonly used under transmission conditions, UV-grade fused silica is selected as the substrate. Unlike resolution test targets made from soda lime glass, UV-grade fused silica offers excellent transmission from the ultraviolet through the infrared spectrum, making it ideal for use in eyepieces as a positional reference. LBTEK also provides customerization reticle services. For specific pattern or size requirements, please contact LBTEK Technical Support.