QB21 colored glass is an absorptive optical glass with a transparent blue hue. After grinding and polishing, its overall light transmittance exceeds 90%, and the surface remains smooth. It can also undergo optical tempering to enhance hardness. This product is widely used in various instruments such as fluorescence analyzers, biometric systems, optical sensors, and camera lenses. Additionally, coating can be applied to improve light transmittance and provide anti-oxidation properties.

Available grades of absorptive cyan-blue optical glass include: QB1, QB2, QB3, QB4, QB9, QB10, QB11, QB12, QB13, QB16, QB17, QB18, QB19, QB21, QB23, QB24, QB26, QB29, QB38, and QB39 series.

Product dimensions: 50*50*2.0mm (customizable according to customer requirements)
Optical characteristics: Please refer to the spectral diagram below

Dimensional tolerance: ±0.1mm; Thickness tolerance: ±0.1mm
Surface finish: 60-40 to 80-50