ES2396536B1 - ELECTROMAGNETIC RADIATION TRANSMITTER COATING - Google Patents

Abstract

The invention relates to a coating formed by at least one layer of transmitting paint. Said paint layers generate a dioptre with the air, and its refractive index can be adjusted as a function of the composition and surface finish thereof. By applying a light source to an object painted with this coating, the surface thereof will be illuminated, independently of its geometry. The invention is intended for use in the fields of lighting and signage and in hospital environments.

Description

Transmitter coating of electromagnetic radiation.

Sector "of the technique

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The present invention falls within the lighting sector. Although it is extensive because of its application to the signage industry or through the application of Ultraviolet e to sterilize in the hospital medical field.

Background of the Invention

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Different light transmission systems based on optical fiber are known, either in their conventional form or in the form of a sheet, obtained industrially by means of a fiber optic preform that subsequently undergoes a stretching process intended to transmit different ranges of the electromagnetic spectrum. JP 11038232 describes a transparent resin with particles intended to create a diffusing layer on a light screen, sifting it, achieving the effect that produces for example an acid or glazed glass sheet.

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There is no known history of coatings formed by layers of paint designed to transmit and diffuse light radiation.

Object of the invention

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Be able to illuminate any surface regardless of its geometry, applying a new coating formed at least by a layer of light-transmitting paint. This would allow for example to illuminate the walls of an operating room, furniture, appliances or advertising panels.

Description of the invention

There are numerous applications where it is necessary to illuminate certain surfaces, since

be it for decorative, signaling or other purposes.

The present invention proposes a solution to illuminate an object, through a new coating whose physical-optical properties allow it to create a diopter formed by the coating and the air that allows to transmit a radiation of light and diffuse it from the surface of the painted object.

After applying this coating (1) (figure 1) on an object (5) (figure 1), so that it illuminates, a light source (2) will be activated (figure 1) that transmits the radiation to the interior (3) (figure 1) of the coating. This source of electromagnetic radiation can have a wavelength range from 50 micrometers (infrared) to 400 nanometers (ultraviolet).

The coating shall consist of at least one paint layer of polymeric base material, silicone, polyurethane, fiberglass, acrylic polymer, acrylic resin, polyester, vinyl or epoxy, with a light permeability greater than 80% and with a refractive index between 1.2 and 1.9.

In order for the light radiation to be conducted inside the coating, the diopter formed by the coating and the air allows the critical angle of reflection not to be exceeded.

The diffusion (4) (figure 1) of the light outside can be achieved with different coating characteristics. On the one hand, the modification of the surface roughness from 10 to 300 micrometers acts by generating a change in the radiation exit angle, exceeding the critical index of refraction and thereby varying the amount of diffused light. On the other hand, diffusion abroad can be achieved by anisotropy of the coating, generated by the addition of micro or nano particles (6) (figure 4), of nitrides, carbides, oxides such as silicon oxide, titanium, zirconium, cerium, metal salts, and halogenated derivatives, since the addition of these components modify the physical-optical properties of the coating such as the refractive index, the reflection index, the attenuation and the light permeability. Causing that part of the light transmitted through the interior of the coating change its angle of refraction and diffuse to the outside (4) (figures 1, 2, 3, 4 and 5).

Another way to vary the coating index is to include loads or

additives such as AsGa, KH2P04, KDl P04 or liTaD], whose refractive values change when an electric field is applied.

Versions of this coating are planned in which paint layers are incorporated

5 conventional reflective (7) (figure 2). This layer is between the object to be coated (5) (figure 2) and the transmitting layer (8a) (figure 2) in order to improve the transmission efficiency of the light source. In turn, this layer avoids the physical-optical discontinuities of the base object, homogenizing it to a known value. And other versions in which the reflective paint layer (9) (figure 3) is located on the outside of the coating, in order to minimize

10 diffusion losses in those areas where you do not want to illuminate.

The coating is applied in at least one layer on the object that we want to illuminate using conventional painting techniques, both manual or industrialized, such as: rollers. brush, spray painted gun Curtain or electrodeposition.

BRIEF DESCRIPTION OF THE DRAWINGS:

For the best understanding of what is described herein, some drawings are attached by way of example only.

Description figures

Figure 1: Coating applied to an object with the light source and the radiation transmission to the surface outside. Description of the elements: coating of one or several layers of paint (1), radiation emitting source (2), transmitted radiation conducted inside the coating (3), radiation diffusing the coating (4) outside, object to light up (5).

Figure 2: Detail of the coating with a reflective layer between the coating and the object to be illuminated. Description of the elements: radiation transmitted or conducted inside the coating (3), radiation diffusing outside the coating (4), object to be illuminated (5), reflective paint layer (7), acrylic paint layer (Ba ).

Figure 3: Detail of the coating with a reflective layer between the coating and the air. Description of the elements: radiation transmitted or conducted inside the coating (3), radiation diffusing outside the coating (4), object to be illuminated (5), acrylic paint layer with micro or nano particles (Ba) and layers of reflective paint (9).

Figure 4: Detail of the coating with multiple layers, with a layer with particles to modify the direction of the radiation. Description of the elements: coating of one or several layers of paint (1), radiation transmitted or conducted inside the coating (3), radiation diffusing outside the coating (4), nano or micro particles included in the paint ( 6), reflective paint layer (7), micro or nano acrylic paint layer

particles (8a) and silicone-based paint layer (Bb).

Figure 5: Example of application in medical equipment. Description of the elements: coating of one or several layers of paint (l), radiation emitting source (2), radiation diffusing outside the coating (4), object to be illuminated (5) is a medical device

T.A.e.

DESCRIPTION OF A PREFERRED EMBODIMENT:

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An example of a preferred embodiment is cited, being independent of the object of the invention the materials used in the manufacture of the components of the paint, the layers that form it and the methods of application and all the accessory details that may arise, always V when they do not affect their essentiality.

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The described embodiment comprises a coating (1) (figures 4 and 5) that transmits electromagnetic radiation more specifically in its ultraviolet C range. This radiation has known sterilizing effects. This coating is applied on an object to be illuminated (5) (figures 4 and S) in this case a computerized axial tomography (T.A.C.) equipment, whose complex geometry and difficult access requires an effective sterilization method.

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First, a first layer of conventional reflective paint (7) (Figure 4) is applied by means of a spray gun, such as a white paint formulated with anatase titanium dioxide given its high reflection index. This allows the surface of the object to be homogenized and in turn minimizes radiation attenuation.

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After drying, a second layer of acrylic-based transmitter paint (8a) is applied (figure 4) due to its rapid drying with a light transmission greater than 90% and with a characteristic refractive index of 1.49. This second layer of paint is formulated with micro particles of metal oxides such as cerium oxides. Causing that part of the light transmitted through the interior of the coating affects the micro particles (6) (figure 4) changing its angle of refraction and diffuses to the outside (4) (figures 4 and 5).

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Finally, a third layer of a silicone-based paint (8b) (figure 4) with a light transmission greater than 60% and a characteristic refractive index of less than 1.4 is applied. The diopter formed by the second and third layers will allow the formation of a refractive index jump structure for radiation guidance. ultraviolet radiation is transmitted following a zigzag path (3) (figure 4). And its diffusion will be the result of the anisotropy of the second layer of paint created with the addition of the metal oxide particles.

Once the coating has dried, we will apply an ultraviolet light source e (2) (figure SI,

so that this radiation penetrates into the second layer of paint so that the radiation and its sterilizing effects will be transmitted along the coating spreading

(4) (figure 5) part of it on the entire surface of the object.

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Claims (3)

1. Coating for infrared range radiation transmission to Ultraviolet S from an external light source characterized by being constituted by a layer of paint (1) that conducts electromagnetic radiation from the range of 50 micrometers to 400 nanometers inside, consisting of at least one layer of paint (8a) of polymeric base material, silicone, polyurethane, fiberglass, acrylic polymer, acrylic resin, polyester, 10 vinyl epoxy or PET, with a luminous permeability greater than 60%, with a refractive index between 1.3 V 1.9, V with a surface roughness of 10 to 300 micrometers. 2. Coating according to the definition of claim 1 characterized by including anisatropia in the layer by the addition of micro or nano particles (6) 15 nitrides, carbides, oxides such as silicon oxide, titanium oxide, zirconium oxide, cerium oxide, metal salts, and halogenated derivatives. 3. Coating according to the definition of claims 1 and 2, characterized in that at least one of the layers of the coating (1) includes fillers or additives of AsGa, KH 2P04, KD2P04 or liTaOl. •