TWI486144B - Multi-light couple device - Google Patents

Description

Multi-optical coupling

The invention relates generally to an optical coupling device, and more particularly to a multi-optical coupling device.

As shown in Fig. 1, a general endoscope light source uses a fiber A1 to conduct a light beam generated by the light-emitting diode A2, and irradiates the light beam to a predetermined area by the flexibility of the optical fiber A1. In the prior art, the light-emitting diode A2 is disposed on the top end A11 of the optical fiber A1. However, since the area of the fiber tip A11 is limited and it is impossible to arrange more of the light-emitting diodes A2, the brightness of the endoscope light source is limited.

An embodiment of the present invention provides a multi-optical coupling device including a light pipe, a first light source, a first filter film, and a second light source. The light pipe has a first light source area and a second light source area. The first light source is disposed on an outer side of the light guide and corresponds to the first light source region, wherein the first light source generates a first light beam, and the first light beam is located in a first wavelength portion. The first filter film is disposed in the first light source region, and passes the light beam located in the first wavelength section, and reflects the light beam located outside the first wavelength section, wherein the first light beam located in the first wavelength section passes through the first light beam A filter film enters the interior of the light pipe. The second light source is disposed on the outer side of the light guide and corresponds to the second light source region, wherein the second light source emits a second light beam into the interior of the light guide. A portion of the second light beam inside the light guide is located outside the first wavelength section, and when the second light beam located outside the first wavelength section is irradiated to the first filter film, the first filter film reflects at the first wavelength a second beam outside the segment.

In summary, the multi-optical coupling device of the present invention can provide a plurality of light sources on a light guide to increase the luminous flux output by the light guide. In addition, the filter film of the present invention can pass the light beam of one corresponding wavelength section and reflect the light beam of other wavelength sections, thereby reducing the loss caused when a plurality of light sources are disposed on the light guide.

Fig. 2 is a perspective view of the multi-optical coupling device 1 of the first embodiment of the present invention. Fig. 3 is an exploded view of the multi-optical coupling device 1 of the first embodiment of the present invention. Fig. 4 is a schematic view showing the multi-optical coupling device 1 of the first embodiment of the present invention. The multi-optical coupling device 1 includes a light pipe 10, a heat dissipating component 20, a mounting frame 30, an optical fiber 40, and a plurality of light source modules 50, 60.

The light pipe 10 can be a hollow structure and has an opening h1. The material of the light guide 10 can be, for example, a transparent material such as glass or plastic or a light-transmitting material. The light pipe 10 includes a top portion 11, a plurality of side walls 12, and a plurality of protrusions 13. The top portion 11 may be a plate-like structure disposed perpendicular to an extending direction D1. The side wall 12 may be a plate-like structure and disposed in parallel extending direction D1. The side wall 12 is connected to the top portion 11 and forms an opening h1. The side walls 12 can be perpendicular to each other and can be perpendicular or substantially perpendicular to the top portion 11. The opening h1 is opposite to the top 11, that is, the opening h1 and the top 11 are respectively located on the side wall 12 ends.

The protruding portions 13 are respectively disposed on the side wall 12 and extend radially perpendicular to the extending direction D1. The protrusion 13 may be located at one end of the side wall 12 and adjacent to the opening h1. Further, the protruding portions 13 may be integrally formed with the side walls 12, respectively.

The heat dissipating component 20 includes a base 21 and a heat sink 22. The pedestal 21 has a receiving groove 211, and one end of the light pipe 10 can be fixed in the accommodating groove 211. The top portion 11 of the light pipe can be received in the receiving groove 211, and the light source module 50 is in contact with the base 21. The material of the heat sink 22 can be metal to assist the base 21 and the light source module 50 to dissipate heat.

The holder 30 may be a plate-like structure fixed to the light pipe 10. The fixing frame 30 has a fixing groove 31 and a plurality of screw holes 32. The protruding portion 13 of the light pipe 10 and the side wall 12 can be fixed in the fixing groove 31. The holder 30 can be locked to another object via a screw hole 32.

The optical fiber 40 can be disposed in the light pipe 10 via the opening h1. Through the heat dissipating component 20 and the fixing frame 30, the user can quickly replace the light pipe 10 and assemble the multi-optical coupling device 1.

The light source module 50 is disposed on the outer side of the light pipe 10 . In the embodiment, the light source module 50 is disposed on the top portion 11 , and the light source module 60 is disposed on the side wall 12 . In another embodiment, the light source modules 50, 60 are selectively disposed on the top portion 11 and/or the side walls 12, and are not limited thereto. In addition, for convenience of description, in the embodiment, three light source modules are taken as an example, but the number of the light source modules may be two or more.

In the present embodiment, the side walls 12 are four, but in another embodiment, the side walls 12 may be three or more. As shown in Figure 2, since the side walls 12 are all surrounded The optical fiber 40 is disposed, so when the number of the side walls 12 is small (for example, three, the side wall 12 forms a hollow triangular column), the width of each side wall 12 is wider, and the area of the light source module 60 disposed on the side wall 12 can be compared. Large, each light source module 60 can generate a large luminous flux, but more of the light beam will be lost by the gap between the side wall 12 and the optical fiber 40.

When the number of the side walls 12 is large (for example, five, the side wall 12 forms a hollow pentagonal column), and the side wall 12 is tightly covered with the optical fiber 40, the width of each side wall 12 is narrow, and the light source disposed on the side wall 12 The area of the module 60 is small, and each of the light source modules 60 can generate a small amount of light flux, but fewer beams are lost by the gap between the side wall 12 and the optical fiber 40.

As shown in Fig. 4, the light guide 10 is provided with a plurality of light source regions Z1, Z2. In this embodiment, the light source region Z1 may be located at the top portion 11, and the light source region Z2 may be located at the sidewall 12. However, the light source regions Z1 and Z2 are selectively located at the top portion 11 and/or the side wall 12, and are not limited thereto. It should be noted, however, that the light source modules 60 on the side walls 12 will increase the loss of the beam if they oppose each other. Therefore, the light source modules 60 on the side walls 12 can be arranged in an interlaced arrangement.

The outer surface S1 of the sidewall 12 of the light pipe 10 or the inner surface S2 (in the present embodiment, the inner surface S2), and a portion outside the light source region Z2 is provided with a reflective film 14 for reflecting the light pipe 10 Internal beam. The reflective film 14 can be disposed outside the light source region Z2 by means of a plating film, for example, but the disclosure is not limited thereto.

The light source module 50 is disposed in the light source region Z1 and includes a first light source 51, a filter film 52, and a wavelength conversion layer 53. The first light source 51 can be composed of one or more light emitting diodes. The first light source 51 can be disposed on the light pipe The outer side of 10 corresponds to the light source area Z1. In the present embodiment, the first light source 51 is disposed on the outer surface S1 of the light pipe 10.

The filter film 52 is disposed on the light source region Z1. The wavelength conversion layer 53 is disposed on the light source region Z1. In the present embodiment, the filter film 52 is disposed on the inner surface S2 of the light pipe 10, and the wavelength conversion layer 53 is disposed on the filter film 52. The filter films 52 and 53 can be disposed on the light source region Z1 by using a plating film, for example, but the disclosure is not limited thereto.

The first light source 51 can generate a first light beam. The first light beam is emitted by the first light source 51 and sequentially passes through the filter film 52 and the wavelength conversion layer 53 to enter the inside of the light guide 10. The material of the wavelength conversion layer 53 may be a fluorescent glue. When the first beam passes through the wavelength conversion layer 53, the wavelength of part of the first beam is changed.

A light source module 60 can be disposed in the second light source region Z2, and includes a second light source 61, a filter film 62, and a wavelength conversion layer 63. The second light source 61 is composed of one or more light emitting diodes. The second light source 61 can be disposed on the outer side of the light pipe 10 and corresponds to the second light source region Z2. In the embodiment, the second light source 61 is disposed on the outer surface S1 of the light pipe 10.

The filter film 62 is disposed on the second light source region Z2. The wavelength conversion layer 63 is disposed on the second light source region Z2. In the present embodiment, the filter film 62 is disposed on one inner surface S2 of the light pipe 10, and the wavelength conversion layer 63 is disposed on the filter film 62.

The second light source 61 can generate a second light beam. The second light beam is emitted by the second light source 61 and sequentially passes through the filter film 62 and the wavelength conversion layer 63 to enter the inside of the light guide 10. The material of the wavelength conversion layer 63 can be a fluorescent glue, when After the second beam passes through the wavelength conversion layer 63, the wavelength of a portion of the second beam is changed.

For example, the first beam and the second beam may both be blue light, and thus the dominant wavelength of the first beam and the second beam is a wavelength segment between 435 nanometers (nm) and 490 nm. The filter films 52, 62 are capable of passing light beams of wavelength sections having wavelengths between 380 nm and 500 nm, but are capable of reflecting light beams of other wavelength sections (bands). Therefore, the first light source 51 and the second light source 52 generate the first light beam and the second light beam of the wavelength band between 435 nm and 490 nm, respectively, and pass through the filter films 52, 62, respectively.

In this embodiment, the material of the wavelength conversion layers 53, 63 may be a yellow fluorescent glue. Since the first beam passing through the filter film 52 will then pass through the wavelength conversion layer 53, and the second beam passing through the filter film 62 will then pass through the wavelength conversion layer 63, a portion of the first beam and the second beam will be converted into The wavelength band is greater than 500 nm, and the light beam of this wavelength band is reflected inside the light pipe 10 or directly irradiated to the optical fiber 40. Therefore, when the first light beam and the second light beam inside the light guide 10 are irradiated to the filter film 52 and/or 62, they are reflected by the filter film 52 and/or 62.

The conversion ratio of the wavelength conversion layers 53 and 63 to the wavelength of the light beam is 60% or more, and may be 70%, 80%, or 90% or more. For example, when the conversion ratio of the wavelength conversion layers 53, 63 is 80%, the first and/or second light beams may have 20% blue light and 80% yellow light through the wavelength conversion layer 53 and/or 63, after mixing Forming white light.

The reflectance of the light beams reflected by the filter films 52 and 62 passing through the wavelength conversion layers 53 and 63 may be 60% or more, and may be 70%, 80%, or 90%. on. Therefore, when the plurality of light source modules 50, 60 are disposed on the top and/or the side walls 12, the reflection of the light beams that are incident on the light source regions Z1, Z2 where the light source modules 50, 60 are located can be maintained, so that the light beam can be minimized. The loss is conducted to the optical fiber 40 inside the light pipe 10. Therefore, when more light source modules are disposed on the light pipe 10, the luminous flux entering the optical fiber 40 can be gradually increased.

In addition, even if only one light source module is provided with a filter film, it can be achieved that when a plurality of light sources are disposed in the light pipe 10, the loss of the light beam when transmitting through the light pipe 10 is reduced, so the number of the filter films is No restrictions.

In another embodiment, the wavelength section of the first beam may be different from the wavelength section of the second beam, so that the filter film 52, the filter film 62, the wavelength conversion layer 53, and/or the wavelength may be selectively omitted. The conversion layer 63, and thus the number of filter films and wavelength conversion layers, is not limited.

Fig. 5 is a schematic view showing a multi-optical coupling device 1a according to a second embodiment of the present invention. The main differences between the second embodiment and the first embodiment are explained below. A groove 121 is formed on the inner surface S2 of the side wall 12 of the light pipe 10. The wavelength conversion layer 63 of the light source module 60a is located in the recess 121, the filter film 62 is disposed on the outer surface S1, and the second light source 61 is disposed on the filter film 62. Further, the reflective film 14 may be disposed on the outer surface S1 or on the inner surface S2 and not on the region of the recess 121. Therefore, the wavelength conversion layer 63 may not protrude from the inner surface S2 of the multi-optical coupling device 1a, and the influence on the reflection of the light beam may be reduced. In another embodiment, the filter film 62 and the wavelength conversion layer 63 may be disposed in the recess 121.

The multi-optical coupling device 1a further includes a light guiding component 70 disposed inside the light pipe 10, and the width of the light guiding component 70 can be smaller than the width of the light pipe 10. half. The light guiding element 70 may be a solid cylindrical body that transmits light and extends in the extending direction D1. The light guiding element 70 can include a reflective film 71 disposed on a sidewall of the light guiding element 70 for reflecting a light beam inside the light pipe 10 and between the light guiding elements 70. One end of the light guiding element 70 passes through the wavelength conversion layer 53 and contacts the filter film 52, so that the first light beam of the first light source 51 can directly enter the light guiding element 70 through the filter film 52. The other end of the light guiding element 70 faces the optical fiber 40 and is at a distance D from the optical fiber 40.

In the present embodiment, the cross-sectional area of the light guiding element 70 and the relative position inside the light pipe 10 are not limited. In addition, the first light beam of the first light source 51 may be a wavelength section located in the blue light. Since the first light source 51 does not pass through the wavelength conversion layer 53, the first light beam also maintains the wavelength range of the blue light inside the light guiding element 70. . Therefore, the luminous flux of the wavelength section of the blue light can be increased by the light guiding element 70.

In this embodiment, the distance D between the light guiding element 70 and the optical fiber 40 affects the uniformity of the light beam outputted to the optical fiber 40. When the distance between the light guiding element 70 and the optical fiber 40 is longer, the light beam outputted to the optical fiber 40 is uniform. The greater the degree, the more uniformity can be achieved accordingly. For example, the uniformity of the light beam with the distance between the light guiding element 70 and the optical fiber 40 being greater than 5 millimeters (mm) may be greater than 80%, and when the distance between the light guiding element 70 and the optical fiber 40 is 3 mm, the uniformity of the light beam is approximately 50%, when the distance between the light guiding element 70 and the optical fiber 40 is 1 mm, the uniformity of the light beam is about 10%.

In another embodiment, one end of the light guiding element 70 can pass through the filter film 52 and the wavelength conversion layer 53 to directly contact the top 11 of the light pipe 10.

Figure 6 is a diagram showing the multi-optical coupling device 1b of the third embodiment of the present invention. intention. The main differences between the third embodiment and the second embodiment are explained below. The second light source 61 of the light source module 60b is inclined to the outer surface S1 of the light pipe 10 (or the second light source 61 has an angle with the outer surface S1 of the light pipe 10), so that the vector of the second light beam toward the optical fiber 40 can be increased, thereby The loss of light transmitted through the light pipe 10 is reduced.

The light source module 50b may further include a primary light source 54 having a wavelength section different from that of the first light source 51. For example, the secondary light source 54 may be a wavelength section of red light. The secondary light source 54 corresponds to one end of the light guiding element 70 and directly emits a light beam toward the light guiding element 70, whereby the light color of the light pipe 10 outputted to the optical fiber 40 can be changed and adjusted.

In the present embodiment, the ratio of the secondary light source 54 to the light source region Z1 and the area of the secondary light source 54 to the first light source 51 is not limited.

In summary, the multi-optical coupling device of the present invention can provide a plurality of light sources on a light guide to increase the luminous flux output by the light guide. In addition, the filter film of the present invention can pass the light beam of one wavelength section of the corresponding light source and reflect the light beams of other wavelength sections, thereby reducing the loss caused when a plurality of light sources are disposed on the light guide.

The present invention has been described above with reference to various embodiments, which are intended to be illustrative only and not to limit the scope of the invention, and those skilled in the art can make a few changes without departing from the spirit and scope of the invention. With retouching. The above-described embodiments are not intended to limit the scope of the invention, and the scope of the invention is defined by the scope of the appended claims.

[Practical Technology]

A1‧‧‧ fiber

A11‧‧‧ top

A2‧‧‧Light Emitting Diode

[this invention]

1, 1a, 1b‧‧‧ multiple optical coupling devices

10‧‧‧Light pipes

11‧‧‧ top

12‧‧‧ side wall

121‧‧‧ Groove

13‧‧‧Protruding

14‧‧‧Reflective film

20‧‧‧ Heat Dissipation Components

21‧‧‧Base

211‧‧‧ accommodating slots

22‧‧‧ Heat sink

30‧‧‧Retaining frame

31‧‧‧ fixing slot

32‧‧‧ screw holes

40‧‧‧Fiber

50, 50a, 50b‧‧‧ light source module

51‧‧‧First light source

52‧‧‧Filter film

53‧‧‧wavelength conversion layer

54‧‧‧ secondary light source

60, 60a, 60b‧‧‧ light source module

61‧‧‧second light source

62‧‧‧Filter film

63‧‧‧wavelength conversion layer

70‧‧‧Light guiding elements

71‧‧‧Reflective film

D‧‧‧Distance

D1‧‧‧ extending direction

H1‧‧‧ openings

S1‧‧‧ outer surface

S2‧‧‧ inner surface

Z1, Z2‧‧‧ light source area

1 is a schematic view of a conventional light source of an endoscope; FIG. 2 is a perspective view of a multi-optical coupling device according to a first embodiment of the present invention; and FIG. 3 is a multi-optical coupling device according to a first embodiment of the present invention; 4 is a schematic view of a multi-optical coupling device according to a first embodiment of the present invention; FIG. 5 is a schematic view of a multi-optical coupling device according to a second embodiment of the present invention; and FIG. 6 is a view of the present invention A schematic diagram of a multi-optical coupling device of the third embodiment.

1‧‧‧Multiple optical coupling

10‧‧‧Light pipes

11‧‧‧ top

12‧‧‧ side wall

14‧‧‧Reflective film

40‧‧‧Fiber

50‧‧‧Light source module

51‧‧‧First light source

52‧‧‧Filter film

53‧‧‧wavelength conversion layer

60‧‧‧Light source module

61‧‧‧second light source

62‧‧‧Filter film

63‧‧‧wavelength conversion layer

D1‧‧‧ extending direction

H1‧‧‧ openings

S1‧‧‧ outer surface

S2‧‧‧ inner surface

Z1, Z2‧‧‧ light source area

Claims (20)

A multi-optical coupling device includes: a light pipe, a first light source region and a second light source region; a first light source disposed on an outer side of the light pipe and corresponding to the first light source region, wherein the first The light source generates a first light beam, and the first light beam is located in a first wavelength section; a first filter film is disposed in the first light source region, and allows the light beam located in the first wavelength segment to pass through, and Reflecting a light beam located outside the first wavelength section, wherein the first light beam located in the first wavelength section passes through the first filter film to enter the inside of the light pipe; and a second light source is disposed on the light The second side of the conduit corresponds to the second light source region, wherein the second light source emits a second light beam into the light guide, wherein a portion of the second light beam inside the light guide is outside the first wavelength portion And when the second light beam located outside the first wavelength section is irradiated to the first filter film, the first filter film is reflected in the first wavelength region Said second light beam away from. The multi-optical coupling device of claim 1, further comprising a first wavelength conversion layer disposed in the first light source region, wherein the first light beam sequentially passes through the first filter film and the first The wavelength conversion layer enters the inside of the light guide, and after the first light beam passes through the first wavelength conversion layer, a portion of the first light beam has a wavelength that is changed and is located outside the first wavelength portion. Such as the multi-optical coupling device described in claim 1 of the patent scope, A second filter film is disposed in the second light source region, wherein the second light beam passes through the second filter film to enter the internal filter film of the light pipe. The multi-optical coupling device of claim 1, further comprising: a second filter film disposed in the second light source region; and a second wavelength conversion layer disposed in the second light source region, wherein The second light beam sequentially passes through the second filter film and the second wavelength conversion layer to enter the inside of the light guide, and after the second light beam passes through the second wavelength conversion layer, a part of the wavelength of the second light beam The filter film is changed and located outside the first wavelength section. The multi-optical coupling device of claim 1, further comprising a first wavelength conversion layer disposed on the first filter film, wherein the first filter film is disposed on an inner surface of the light pipe on. The multi-optical coupling device of claim 5, wherein the inner surface has a recess, and the first filter film and the first wavelength conversion layer are located in the recess. The multi-optical coupling device of claim 1, further comprising a first wavelength conversion layer disposed on an inner surface of the light pipe, wherein the first filter film is disposed outside one of the light pipes On the surface. The multi-optical coupling device of claim 7, wherein the inner surface has a recess, and the first wavelength conversion layer is located in the recess. The multi-optical coupling device of claim 1, wherein The light pipe has a top portion, a plurality of side walls, and an opening relative to the top portion, the side wall being connected to the top portion and forming the opening. The multi-optical coupling device of claim 9, wherein the first light source region is located at the top portion, and the second light source region is located at least one of the sidewalls. The multi-optical coupling device of claim 9, wherein the first light source region is located at least one of the side walls, and the second light source region is located at the top portion. The multi-optical coupling device of claim 9, wherein the first light source region and the second light source region are located on the side wall. The multi-optical coupling device of claim 9, further comprising a reflective film disposed on the sidewall for reflecting the first and second light beams inside the light guide. The multi-optical coupling device of claim 9, further comprising a heat dissipating component disposed on the top portion. The multi-optical coupling device of claim 9, further comprising a fixing frame for fixing the light guide. The multi-optical coupling device of claim 15, wherein the light guide further comprises a plurality of protruding portions respectively disposed on each of the side walls, and the protruding portion and the side wall are disposed on the fixing frame. The multi-optical coupling device of claim 9, further comprising an optical fiber, wherein one end of the optical fiber is disposed at the opening, and the first light beam and the second light beam are directly inside the light guide Or enter the above optical fiber through the reflection of the above light guide. The multi-optical coupling device of claim 17, further comprising a light guiding element disposed inside the light guide, wherein one end of the light guiding element faces the top portion, and the other end of the light guiding element Facing the above fiber. The multi-optical coupling device of claim 18, wherein the light guiding element is a solid cylindrical body that transmits light. The multi-optical coupling device of claim 18, further comprising a primary light source disposed on the top of the light guide and located outside the light guide, wherein the secondary light source emits a primary light beam into the light guiding element.