The Quantum SEgrade series are designed for most amateur and some academic applications. These filters meet the critical DayStar quality control criteria applicable in all visual and some photographic environments.
Our Quantum PE grade series is designed for professional research studies and applications in which precision homogeneity and onband transmitance values across the substrate surface are required. These filters require additional quality control steps and additional fabrication and testing time. (READ MORE ABOUT OUR PE GRADE CERTIFICATION)
* HALF-BANDWIDTH: The term half-bandwidth refers to an optics industry standard of measure. On a chart depicting the peak where light is transmitted, that peak's width is measured at the point 50% between zero and full transmission. This term is called half-bandwidth.