DIA50.8mm BK7 BI-CONVEX LENSES

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Fabricating large bi-convex lenses is significantly more difficult than making smaller ones, primarily due to the challenges in handling, manufacturing, and metrology. i.e Substrate Shaping and Grinding, Polishing, Coating, ensuring consistent Thermal and Mechanical Stress.

Measuring the optical quality of a large lens is often the most significant challenge. Standard interferometers used to measure surface flatness and figure have apertures that are typically much smaller than a large lens. This means a technician must take multiple measurements and stitch them together, a process that can introduce errors and may not accurately capture larger-scale surface deviations. Specialized, larger metrology equipment is required, which adds to the overall cost and complexity of the process.

POL-BK7-BCX-B-50 SERIES