Transmission gratings summary LightSmyth（透射光栅LightSmyth总结）.pdf

High Efficiency Transmission Diffraction Gratings Overview LightSmyth Technologies’ transmission gratings are fabricated on fused silica substrates and robust dielectric films by state-of-the-art projection photolithography and reactive ion etch. These high fidelity semiconductor fabrication methods enable precise realization of sophisticated proprietary grating designs that provide diffraction efficiency close to 100% and line spacing control to 1 part per million. No other grating technology is capable of achieving this degree of performance combined with the cost effectiveness and reproducibility afforded by semiconductor volume fabrication technology. Due to the intrinsic design, the gratings have very broad wavelength range of high performance that may be further enhanced by tuning the angle of incidence. Features:  High Diffraction Efficiency in Broad Range of Wavelengths  Low Polarization Sensitivity.  Excellent Feature Fidelity and Groove Uniformity.  Only fused Silica and robust dielectrics are used, no polymers.  Extreme environmental stability. Tellcordia qualified.  Each grating is a master: low light scatter, no ghosting.  Large area: Clear aperture up to 140 mm diameter.  Very competitive pricing.  Strict quality control. LightSmyth is ISO 9001:2008 certified. Pulse Grooves/mm Gen