43 results about "High-energy visible light" patented technology

The present invention relates to ophthalmic and non-ophthalmic systems with blue light filtering and Yellowness Index ranges. UV and IR filtering are also included. Industrial applications are also outlined in the invention.

The invention discloses an inflaming-retarding transparent plasticized PVC (Polyvinyl Chloride) functional thin film and a preparation method. The inflaming-retarding transparent plasticized PVC functional thin film has the characteristics of selectively transmitting and absorbing a solar spectrum and multiple functions of efficiently shielding ultraviolet rays, infrared rays, energetic visible light-blue light and the like. The inflaming-retarding transparent plasticized PVC functional thin film has an average shielding rate, which is up to 99 percent or above, in a 200nm to 400nm of ultraviolet waveband and an average inhibition rate, which is up to 99 percent or above, for 400nm to 500nm of the energetic visible light (blue light), and meanwhile, has a limit oxygen index which is more than 30 percent. The inflaming-retarding transparent plasticized PVC functional thin film provided by the invention is prepared from the following raw materials by mass: 100 parts of PVC resin, 60 to 70 parts of compound plasticizer, 2 parts of compound heat stabilizer, 0.1 to 1 part of compound light stabilizer, 0.1 to 0.5 part of functional pigment and 0.5 to 1 part of surface graft-modified metallic oxide.

The invention provides a composition for resisting high energy visible light and repairing damage caused by high energy visible light. The composition comprises titanium dioxide and a composition forrepairing damage caused by high energy visible light, wherein the composition for repairing damage caused by high energy visible light comprises a cranberry extract, a withania kansuensis root extract, a cupressus sempervirens leaf extract and an argy wormwood leaf extract. The composition disclosed by the invention not only can withstand scattered high energy visible light and reduce transparencyof the high energy visible light but also can repair mitochondrial DNA damage caused by the high energy visible light, can reduce free radicals generated under the illumination of the high energy visible light, and can also solve the problems of pigmentation and skin aging caused by the high energy visible light.

A light filter that utilizes UV and visible light-absorbing dyes with transmission spectra in accord with the action spectra for suppression of melatonin so as to permit a maximum production of melatonin in humans during night time exposure to high energy visible light.

Described are polymerizable high energy light absorbing compounds of formula I:

wherein R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, and X are as described herein. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.

A design method of a color-controllable high-energy visible light filter comprises the following steps: selecting a filter, wherein the filter contains dye for absorbing short-wave visible light, andthe transmissivity T of the filter is expressed as a function of each parameter of an optical device; Selecting a light source, selecting a color group consisting of one color or a plurality of colors, and expressing each color sensing parameter of the color or the color group required to be optimized as a function comprising a light source D and filter transmissivity T; In a 1976 CIE L * a * b *color sensing space, according to the chroma to be optimized, selecting an optimization vector (shown in the specification) to express the comprehensive chromatic aberration of the color or the colorgroup projected on the chromaticity plane required to be optimized as an E optimization color axis T; And performing multi-objective optimization according to the color sensing parameter required foroptimizing the transmission spectrum and the E optimization color axis and T, selecting an appropriate solution, namely, the transmissivity T of the filter, and further optimally designing each parameter of the optical device of the filter based on a function expressed by the transmissivity T.

The invention relates to modified titanium dioxide particles, a preparation method thereof and a skin care product. The modified titanium dioxide particles comprise a core layer and a shell layer wrapping the core layer, wherein the core layer is made of titanium dioxide as a core, and the shell layer is a polydopamine layer; the particle size of the modified titanium dioxide particles is 200-700nm. In the modified titanium dioxide particles, the polydopamine layer wraps the titanium dioxide, and free radicals generated by the influence of external environments such as illumination can be eliminated, so that the modified titanium dioxide particles have antioxidant performance; meanwhile, the modified titanium dioxide particles have good biocompatibility and water dispersibility and efficient light absorption capacity, have very strong ultraviolet absorption capacity, and also have a better absorption effect on high-energy visible light at 400-500nm; and the modified titanium dioxide particles can also chelate heavy metal ions, so that the damage of the heavy metal ions to the skin can be resisted.

Described are ophthalmic devices and methods for their preparation and use. The ophthalmic device comprises at least one heterocyclic ligand complexed with a transition metal, wherein the ophthalmic device is a polymerization reaction product of a reactive mixture comprising: (a) one or more monomers suitable for making the ophthalmic device; and (b) a heterocyclic ligand-containing monomer, and wherein the ophthalmic device has a transmittance at 400 nm of 90 percent or less.