CN217772553U

CN217772553U - Light guide device and dental light curing machine

Info

Publication number: CN217772553U
Application number: CN202221860214.2U
Authority: CN
Inventors: 戴丽; 刘超; 吴颖; 姚志清; 王增香; 邢向辉; 袁琴; 张旺; 耿文娟
Original assignee: NANJING STOMATOLOGICAL HOSPITAL
Current assignee: NANJING STOMATOLOGICAL HOSPITAL
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-11
Anticipated expiration: 2032-07-19

Abstract

The utility model discloses a light guide device for the curing light output of dental light curing machine. The light guide device comprises a light guide rod and a spherical head connected with the light output end of the light guide rod, the light guide rod is composed of an optical fiber core and an optical fiber cladding coated on the outer layer of the optical fiber core, and the light refractive indexes n1, n2 and n3 of the optical fiber core, the optical fiber cladding and the spherical head meet the condition that n0 is greater than n2 and less than n3 and less than n1, wherein n0 is the light refractive index of air. The utility model also discloses a dental light curing machine. Compared with the prior art, the utility model discloses a set up the spherical head that has specific light refracting index at traditional optical guide stick front end, can improve solidification light optical power distribution homogeneity by a wide margin, avoid the not enough or excessive problem of solidification of resin local solidification to 180 degrees directions at spherical head can both form stable light source, and multiplicable oral cavity illumination area realizes many tooth positions illumination simultaneously.

Description

Light guide device and dental light curing machine

Technical Field

The utility model relates to an oral medical equipment technical field especially relates to a light guide for solidifying light output.

Background

Since the introduction of photocurable composite resins into the oral medical field, their excellent aesthetic and mechanical properties have been favored. The light curing lamp is used as a curing light source, and the correct and efficient application of the light curing lamp becomes a key factor influencing the curing effect.

The light curing lamps are mainly classified into halogen lamps, plasma arc lamps, argon laser lamps, and Light Emitting Diode (LED) light curing lamps. Plasma arc lamps and argon laser lamps are eliminated due to poor performance, and then halogen lamps become the mainstream. With the development of the LED light curing lamp, the LED light curing lamp has the advantages of unique emission spectrum, high curing efficiency, long service life and the like, and gradually replaces other types of light curing lamps to become standard equipment of resin material curing equipment.

Sufficient and appropriate light intensity ensures sufficient conversion of the resin monomer, which is a prerequisite for the resin to achieve desirable physical properties. The traditional view points that the higher the illumination intensity, the more sufficient the curing is, and the illumination intensity of the LED light curing lamp of the new generation exceeds 5000mW/cm ² . High intensity illumination compensates for the loss of light energy when the light source passes through the tooth structure, but too high intensity illumination may cause the hardness of the resin to decrease and promote polymerization shrinkage, so that the cavity and the resin interface cannot be tightly attached to cause microleakage. Since the surface layer of the resin rapidly forms a highly crosslinked polymer network under too high illumination intensity, the area of light passing through is reduced, resulting in low crosslinking frequency of the polymer chains, and thus, the elastic modulus and hardness are reduced. Therefore, the illumination intensity is neither too high nor too lowThe polymerization reaction is facilitated.

The illumination intensity of a light curing lamp is usually defaulted to a single value, but in fact the light output at the lamp head is not uniform, which may result in partial under-or over-curing of the resin, thereby reducing the service life. The uneven illumination intensity of the lamp head of the light curing lamp can cause uneven surface hardness of the cured composite resin.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a light guide device, can improve the luminous power distribution uniformity of the solidification light of exporting by a wide margin.

The utility model discloses specifically adopt following technical scheme to solve above-mentioned technical problem:

a light guide device is used for curing light output of a dental light curing machine and comprises a light guide rod and a spherical head connected with the light output end of the light guide rod, wherein the light guide rod is composed of an optical fiber core and an optical fiber cladding coated on the outer layer of the optical fiber core, and the light refractive indexes n1, n2 and n3 of the optical fiber core, the optical fiber cladding and the spherical head meet the condition that n0 is more than n2 and less than n3 and less than n1, wherein n0 is the light refractive index of air.

Preferably, the optical fiber core and the spherical head are both quartz.

Preferably, the optical fiber cladding is plastic.

Preferably, the optical fiber cladding is a polymer material.

Preferably, the optical refractive index of the optical fiber cladding is in the range of 0.37 to 0.48.

Further, the outer surface of the spherical head is provided with a light diffusion film.

Preferably, the light diffusion film is a light diffusion film of an additive scattering particle type.

Preferably, the light diffusion film is a surface microstructure array type light diffusion film.

Preferably, the light diffusion film is formed by compounding a plurality of film layers with different optical refractive indexes.

Based on the technical scheme, the method also can obtain the following steps:

a dental curing light comprising a light guide for curing a light output, the light guide being as claimed in any preceding claim.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model has the advantages that the spherical head with specific optical refractive index is arranged at the front end of the traditional optical guide rod, so that the optical power distribution uniformity of curing light can be greatly improved, the problems of insufficient local curing or excessive curing of resin are avoided, a stable light source can be formed in the 180-degree direction of the spherical head, the oral cavity irradiation area can be increased, and the simultaneous illumination of multiple tooth positions is realized;

the utility model discloses further set up the light diffusion membrane on spherical head surface, from the solidification light of spherical head output behind the light diffusion membrane, it is bigger to become the area, and the degree of consistency is better, 2 light sources that the colourity is stable for the emergent light area of lamp holder is bigger, and the luminous intensity is more even.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention; wherein, 1 is a light guide rod, 2 is a spherical head, and 3 is a light diffusion film;

FIG. 2 is a schematic diagram of the present invention;

fig. 3 is a microstructure view of two kinds of conventional light diffusion films.

Detailed Description

The problem to the curing light illumination intensity uneven distribution that prior art exists, the utility model discloses a solution thinking sets up the spherical head that has specific light refracting index at traditional light guide stick front end, can improve curing light luminous power distribution homogeneity by a wide margin, avoids the not enough or excessive problem of solidification of resin local solidification to 180 degrees directions at spherical head can both form stable light source, multiplicable oral cavity irradiation area realizes many tooth positions illumination simultaneously.

The technical scheme of the utility model is specifically as follows:

a light guide device is used for curing light output of a dental light curing machine and comprises a light guide rod and a spherical head connected with a light output end of the light guide rod, wherein the light guide rod is composed of an optical fiber core and an optical fiber cladding coated on the outer layer of the optical fiber core, and the light refractive indexes n1, n2 and n3 of the optical fiber core, the optical fiber cladding and the spherical head meet the condition that n0< n2< n3< n1, wherein n0 is the light refractive index of air.

Preferably, the optical fiber core, the optical fiber cladding and the spherical head are all quartz.

Preferably, the optical fiber core and the spherical head are both quartz, and the optical fiber cladding is plastic.

Preferably, the optical fiber core and the spherical head are both quartz, and the optical fiber cladding is made of a polymer material.

Based on the technical scheme, the method also can obtain the following steps:

For the convenience of understanding of the public, the following detailed description of the technical solution of the present invention is provided by a preferred embodiment and with reference to the accompanying drawings:

the light guide device of the present embodiment, which has the structure shown in fig. 1, includes a light guide rod 1, a spherical head 2 connected to the light output end of the light guide rod 1, and a light diffusion film 3 disposed on the outer surface of the spherical head 2; the light guide rod 1 is composed of an optical fiber core and an optical fiber cladding coated on the outer layer of the optical fiber core.

The working principle of the light guide device is shown in fig. 2, n0, n1, n2 and n3 are respectively the refractive indexes of air, an optical fiber core, an optical fiber cladding and a spherical head, and n0< n2< n3< n1; at this time, as shown in fig. 2, there is no symmetry between the incident light and the emergent light, and the included angle between the emergent light and the central line of the optical fiber is no longer Φ, but Φ'.

Because Φ' < Φ, i.e., the perforation angle is said to be smaller, this facilitates more uniform light extraction.

The light diffusion film has the function that light passes through media with different refractive indexes to refract, reflect and scatter the light, so that the emitted light is uniformly distributed, and the light diffusion effect is achieved. According to the incident light diffusion principle, the existing light diffusion film is mainly divided into 2 types, namely (1) a type of adding scattering particles, wherein particles with light scattering performance are added to the surface or the inside of the light diffusion film, and light rays generate the comprehensive action of reflection, refraction and scattering among different materials, so that the light diffusion effect is generated; (2) The surface microstructure array type refracts and scatters light by means of the shape and arrangement of the surface microstructures, so that the light diffusion effect is achieved. The microstructures of the two light diffusion films are shown in fig. 3, wherein the left side is of a scattering particle adding type, and the right side is of a surface microstructure array type. The two existing light diffusion films can be used in the utility model. In order to improve the light diffusion effect and facilitate the preparation, the light diffusion film used in this embodiment is formed by compounding a plurality of films with different light refractive indexes.

The light guide rod, the spherical head and the light diffusion film can be prepared by selecting various existing light guide materials, and comprehensively considering the aspects of light guide effect, production cost and the like, the light guide rod is preferably made of quartz fibers, the fiber cores of the quartz fibers are made of quartz materials, the fiber cladding can be made of plastic or polymer materials with the refractive index smaller than that of quartz, and the preferred range of the refractive index is 0.37-0.48. The spherical head can be adhered to the output end face of the quartz optical fiber by using pre-ground resin or a quartz hemispherical lens, or a quartz material with a preset refractive index is firstly adhered to the output end face of the quartz optical fiber and is fired into a hemispherical surface by adopting methods such as electrode discharge, flame combustion or laser firing and the like. Then plating a light diffusion film on the outer surface of the spherical head, wherein the light diffusion film is formed by coating materials with different refractive indexes on the spherical head in a layering manner, or quartz glass is adopted to be sintered into a hemispherical cover, scattering particles of barium sulfate and other materials are added in the sintering process, and then the manufactured hemispherical cover is bonded on the outer surface of the spherical head by adopting optical cement.

The dental photocuring machine adopting the light guide device can greatly improve the distribution uniformity of the light power of curing light in the dental treatment process, avoid the problem of insufficient local curing or excessive curing of resin, form a stable light source in the 180-degree direction of the spherical head, increase the irradiation area of the oral cavity and realize the simultaneous illumination of multiple tooth positions.

Claims

1. A light guide device is used for the curing light output of a dental light curing machine and is characterized by comprising a light guide rod and a spherical head connected with the light output end of the light guide rod, wherein the light guide rod consists of an optical fiber core and an optical fiber cladding coated on the outer layer of the optical fiber core, and the optical refractive indexes n1, n2 and n3 of the optical fiber core, the optical fiber cladding and the spherical head meet the condition that n0< n2< n3< n1, wherein n0 is the optical refractive index of air.

2. The light guide of claim 1, wherein the fiber core and the spherical head are both quartz.

3. The light guide of claim 2, wherein the fiber cladding is plastic.

4. The light guide of claim 2, wherein the fiber cladding is a polymeric material.

5. The light guide of claim 1, wherein the optical cladding has an optical index of refraction in the range of 0.37 to 0.48.

6. A light guide device as claimed in any one of claims 1 to 5, wherein the outer surface of the spherical head is provided with a light diffusing film.

7. The light guide device according to claim 6, wherein the light diffusion film is a light diffusion film of a type to which scattering particles are added.

8. The light guide device according to claim 6, wherein the light diffusion film is a surface microstructure array type light diffusion film.

9. The light guide device of claim 6, wherein the light diffusing film is formed by laminating a plurality of films having different refractive indices.

10. A dental curing light comprising a light guide for curing the light output, wherein the light guide is as claimed in any one of claims 1 to 9.