A method to sublimate a wide variety of coatings onto optical lens includes printing a first coating using a sublimation transfer ink onto a sublimation paper, positioning the sublimation paper onto the optical lens to align the sublimation paper to a first surface of the optical lens, placing the sublimation paper thereon, preheating a chamber of a vacuum oven to a predetermined temperature, placing the optical lens into the chamber of the vacuum oven with the first surface of the optical lens facing upward, closing the vacuum oven and setting a predetermined time for heating, heating and vacuuming the chamber of the vacuum oven during about the predetermined time such that the first coating sublimates onto the first surface of the optical lens from the sublimation paper, removing from the vacuum oven and cooling the optical lens having the first coating on its first surface.

The invention provides a thermal cast-molding method for producing colored silicone hydrogel contact lenses. The method of the invention comprises: (1) forming, on a molding surface of a mold, a transferable colored polymeric composite film which comprises or consists essentially of a first polymeric film, a second polymeric film and a cured colored image encapsulated therewithin; (2) dispensing a silicone hydrogel lens formulation into the lens-forming cavity of the mold; and (4) thermally curing the third polymerizable composition within the lens-forming cavity for at least about 40 minutes to form the colored silicone hydrogel contact lens, whereby the transferable, colored, and polymeric composite film detaches from the first or second molding surface and becomes integral with the body of the silicone hydrogel contact lens.

An ophthalmic lens and a method of manufacturing the ophthalmic lens, the ophthalmic lens including a base lens that includes at least a layer of low-birefringence material and at least one holographic component recorded on a surface of the layer of low-birefringence material, and an auxiliary lens assembled to the base lens.

An optical material for making an optical product is provided. The optical material includes a light-resistant material undergone surface modification by titanium dioxide, so that the optical product is at least resistant to light having a wavelength between 280 nm and 380 nm. The optical product and a manufacturing method thereof are also provided.

The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.

A dyeing data management method is performed between dyeing systems disposed at different locations. The method includes a first dyeing step of dyeing a lens in a first dyeing system, a first acquisition step of acquiring first result color information of the lens dyed in the first dyeing system, a dyeing data creation step of creating dyeing data based on a discharge amount of dye in the first dyeing step and the first result color information, a data provision step of providing the dyeing data for dyeing a lens to a predetermined color from the first dyeing system to a second dyeing system, a second dyeing step of performing dyeing of a lens according to the provided dyeing data in the second dyeing system, and a second acquisition step of acquiring second result color information of the lens dyed in the second dyeing system.

An optical component includes a light guide board. The light guide board can include an incident surface, an underside, and an exit surface. The incident surface is connected to the underside and the exit surface, respectively. The underside is parallel to the exit surface. Further, the exit surface includes a prism structure for refracting light in the light guide board.

A method of producing a photochromic resin body includes a first step, a second step and a third step. In the first step, a sublimable photochromic dye having sublimability is applied to a base body so as to obtain a function-adding base body. In the second step, the function-adding base body obtained in the first step is set to face a resin body, the function-adding base body is heated to sublimate the sublimable photochromic dye applied to the function-adding base body, and the sublimable photochromic dye is deposited on the resin body. In the third step, the resin body on which the sublimable photochromic dye is deposited in the second step is heated to fix the sublimable photochromic dye on the resin body.

The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.

In general, the disclosure relates to methods and compositions for preparing colorants useful for preparing pigmented hydrogels. The disclosure further relates to pigmented hydrogels comprising the disclosed colorants. In some instances, the colorant is an alcohol extract of an agro-material, such as turmeric, paprika, spinach, and/or woad or the colorants comprise one or more of: a carotenoid, chlorophyll-a, chlorophyll-b, a curcumoid, or indigorubin. Alternatively, the colorant can be carbon black. The disclosure further relates to contact lenses comprising the disclosed pigmented hydrogels.