Light cylinder, dispenser, and light cylinder manufacturing method
A light cylinder, a dispenser, and a method of manufacturing a light cylinder are disclosed. The light cylinder includes an outer layer and an inside layer, where the inside layer is formed by filling optical resin into the inside space of the outer layer, and the refractive index of the optical resin is determined in consideration of the refractive index of the outer layer.
1. A light cylinder comprising:
an outer layer pre-fabricated as a tube or a cylinder having an inside hollow space, wherein the outer layer has a thickness that is greater than or equal to 0.01 mm and less than or equal to 1 mm, and has a first refractive index; and
an inside layer being a layer of an optical resin made of optical substances without air bubbles,
wherein the outer layer is a sheath of the inside layer,
wherein the inside layer is formed by (i) preparing the outer layer for manufacturing the light cylinder, wherein the outer layer is temporarily held in a holder and moved in a row by a roller member for filling of the optical resin in the inside hollow space of the outer layer, (ii) determining a second refractive index of the inside layer to have a total reflection relationship with the outer layer based on a material of the outer layer, (iii) making the optical resin by combining a plurality of optical substances to obtain the determined second refractive index of the inside layer, (iv) filling the optical resin into the inside hollow space of the outer layer, and (v) UV curing the optical resin by irradiating UV rays in a direction coinciding with a direction in which the optical resin is filled,
wherein no void or oil gap is formed between the outer layer and the inside layer,
wherein the second refractive index of the inside layer is equal to the first refractive index of the outer layer+α, and
wherein α represents a weighted value and satisfies the condition 0.001≤α≤0.003.
2. The light cylinder of claim 1 , the inside layer is a core.
3. The light cylinder of claim 1 , wherein the optical substances include a mixture of at least two of a urethane acrylate compound, an epoxy acrylate compound, an acrylate monomer, an acrylate comprising a vinyl group, a bisphenol compound, and an acrylate comprising a fluoro group.
4. A light cylinder comprising:
an outer layer pre-fabricated as a tube or a cylinder having an inside hollow space; and
an inside layer being a layer of optical resin made of optical substances without air bubbles,
wherein the inside layer is formed by filling the optical resin into the inside hollow space of the outer layer, and UV curing the optical resin by irradiating UV rays in a direction coinciding with a direction in which the optical resin is filled,
wherein the optical resin of the inside layer is formed by combining a plurality of optical substances to have a second refractive index, which is equal to a first refractive index of the outer layer+α, and
wherein α represents a weighted value and satisfies the condition 0.001≤α≤0.003.