The 305 High Flatness Optical Glass Plate, also known as Model 305 high flatness glass, is an optical reference plate engineered to deliver ultra-high flatness and parallelism for precision inspection and calibration applications. The substrate is available in fused silica, alkali-free glass or borosilicate glass, and can be custom cut into strip, square or round formats to suit specific equipment requirements. With a Grade 305 ultra-high flatness standard, the plate exhibits minimal warpage and precise parallelism, providing a stable geometric baseline for high-precision vision systems and AOI calibration. The double-sided ultra-fine polished surfaces are free of scratches, pits, bubbles and stones, ensuring uniform light transmission without stray light interference for reliable optical measurement.

• Grade 305 ultra-high flatness: Minimal plate warpage and precise parallelism support high-precision imaging and AOI calibration with dependable reference accuracy.
• Double-sided ultra-fine polishing: The scratch-free, pit-free and bubble-free surface provides uniform light transmission without stray light interference.
• Low thermal expansion material: Slight deformation under temperature change keeps benchmark precision stable during long-term use.
• Excellent chemical and thermal stability: The plate resists acid and alkali cleaning agents and high temperature, with no precipitates that could contaminate workpieces.
• Precision chamfered edges: Chipping-free and burr-free edges avoid scratching lenses and test pieces during handling.

The 305 High Flatness Optical Glass Plate is designed for high-end precision inspection and calibration environments that demand an ultra-stable optical reference. It is widely used as a calibration reference plate for high-precision vision inspection systems, providing a verified flat surface that confirms the accuracy of cameras and measurement tools. In AOI automatic optical inspection equipment, the plate serves as a benchmark standard for verifying flatness and parallelism, helping to detect systematic errors in the inspection process. The material also works as an optical platform reference for laboratory instruments that require a clean, stable and low-thermal-expansion base. With options for custom strip, square and round cutting, the plate can be adapted to specific instrument geometries while maintaining the same Grade 305 flatness performance across all formats.

• Grade 305 for high-end inspection: The ultra-high flatness level meets demanding precision inspection requirements, with good rigidity and anti-bending performance.
• Full customization available: Thickness, slotting, drilling, optical coating and scale marking can all be tailored to customer specifications.
• High consistency in mass production: Flatness is maintained uniformly across batches, allowing plates to be interchanged between different equipment without recalibration.
• Stable precision after repeated cleaning: The durable surface and chemically stable material ensure measurement accuracy does not degrade after repeated cleaning cycles.