Richard CanonNews / Thursday, May 31, 2018 / Categories: Canon Patents This post may contain affiliate links(s). An affiliate link means I may earn advertising/referral fees if you make a purchase through my link, without any additional cost to you. It helps to keep this site afloat. Thank you in advance for your support. If you like what we do here, maybe buy me a coffee. Canon Patent Application: Air Sphere Coating and Flourine being combined In this patent application, we see Canon combining two coatings to form one coating that would benefit lenses, and allow for greater control of flare and ghosting while at the same time, assist with cleaning the front element and keeping it clean. ASC or Air Sphere Coating has been around since the Canon 100-400L II was released, and Flourine coatings have been implemented in many of Canon's L lenses to date. A low-refractive-index layer utilizing gaps between particles has a problem that oily matter penetrates and diffuses into voids between particles in the film. The present inventor has found that the contamination that has not been visually recognized at the time of adhesion of the contamination and low-molecular-weight oily matter generated by the adhesion of contaminants diffuse among particles in the low-refractive-index layer to decrease the refractive index, resulting in deterioration in the appearance to a degree that can be visually recognized. I would not be surprised to see this technology implemented in some of Canon's higher end L lenses at a future date and time. US Patent Application 20180148603 Richard CanonNewsRichard CanonNews Richard has been using Canon cameras since the 1990s, with his first being the now legendary EOS-3. Since then, Richard has continued to use Canon cameras and now focuses mostly on infrared photography. Richard is the founder and editor of CanonNews since 2017, and has worked as a writer on CanonRumors and other websites in the past. Other posts by Richard CanonNews Contact author Facebook page Previous Article Canon patent application: A new type of stacked sensor design Next Article Canon Patent Application: APS-C Mirrorless/Compact Lenses Print Please login or register to post comments.