3results about How to "Reduce the refractive index difference" patented technology

The application relates to an ultra-low-loss large-effective-area optical fiber, which comprises, from inside to outside along the radial direction of the optical fiber, a core layer, a first gradient layer, an inner cladding layer, a second gradient layer, a sunken cladding layer, a third gradient layer, a transition cladding layer, a fourth gradient layer and an outer cladding layer; the core layer is chlorine-boron co-doped or chlorine-fluorine co-doped silica and is not doped with germanium; the first gradient layer, the inner cladding layer, the second gradient layer, the sunken cladding layer, the third gradient layer, the transition cladding layer and the fourth gradient layer are all fluorine-boron co-doped silica; and the outer cladding layer is pure silica. The application can solve the optical fiber attenuation problem caused by the viscosity imbalance of the existing optical fiber structure while having ultra-low loss and large effective area.

The application provides a display panel and a display device. The display panel comprises a substrate, a display function layer arranged on one side of the substrate, and a light extraction layer located on the side of the display function layer away from the substrate. The light extraction layer comprises a first light extraction layer, a second light extraction layer and a third light extraction layer arranged in sequence in the direction away from the substrate. The refractive index of the second light extraction layer is greater than the refractive index of the first light extraction layer and the refractive index of the third light extraction layer. The display panel provided by the application has a high refractive index of the second light extraction layer, which is beneficial to improving the microcavity effect and the light extraction efficiency. The refractive index of the first light extraction layer and the third light extraction layer is low, which is beneficial to reducing the refractive index difference between the display panel and other film layers, avoiding total reflection caused by the mismatch of the refractive index, improving the light extraction efficiency and power consumption, and improving the performance of the display panel.

The present application relates to a kind of laminated optical films, it is sequentially laminated with the 1st optical film, the 1st adhesive layer, the 2nd optical film, the 2nd adhesive layer and the 3rd optical film, wherein, the 1st adhesive layer and the 2nd adhesive layer are the cured product layer of laminated optical film adhesive composition containing curable component and metal oxide particles.It is preferable that the refractive index of the 1st adhesive layer and the 2nd adhesive layer is 1.55 or more.It is preferable that the refractive index of the 1st optical film and the 2nd optical film is 1.55 or more.It is preferable that the 1st optical film and the 2nd optical film are both phase difference films of liquid crystal type, and it is preferable that the 3rd optical film is at least a polarizing film with polarizer.