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I had to do a lot of googling before I sort of understood this, so for future readers: these people figured out how to create tiny lenses using the same photoli
by msteffen 2y ago
I had to do a lot of googling before I sort of understood this, so for future readers: these people figured out how to create tiny lenses using the same photolithography machines that are used currently used to create microchips (I-line stepper. I-line refers to a specific wavelength of UV light—365nm, and the stepper is the machine that focuses it on the silicon wafer)
- Onavo 2y agoMore metamaterial lenses on the way?
- bhickey 2y agoWatch this space!
- DoctorOetker 2y agoThat is only the context i.e. prior art of their method. The novelty is in eliminating the etching and post-processing steps, by using a colored photoresist: > In this study, we present a simplified method for fabricating visible Fresnel zone plate (FZP) planar lenses, a type of diffractive optical element, using an i-line stepper and a special photoresist (color resist) that only necessitates coating, exposure, and development, eliminating the need for etching or other post-processing steps.