TW201339475A - Light coupling module - Google Patents

Abstract

A light coupling module is provided. The light coupling module includes a plurality of light source devices, an ellipse reflector module and a light guide. Each light source device includes a first directional light source used for providing a light. The ellipse reflector module is used for reflecting the light. The light guide is used for receiving the reflected light.

Description

Optical coupling module

This case is about an optical coupling module.

With the advancement of optical technology, various optical products have been developed. The development of optical products mainly has several directions, including the technology of the light source system, the technology of the light guiding system, and the technology of the image capturing system.

Some of these optical products combine the above various types of technologies, such as optical systems such as endoscopes or microscopes, which require the development of integrated light source systems, light guiding systems, and image capturing systems, which are quite complex.

Due to the high complexity of this type of optical product, many technical bottlenecks hinder the development of the industry. Researchers are committed to investing in technical research in this area to promote industrial development.

This case is about an optical coupling module.

According to a first aspect of the present invention, an optical coupling module is proposed. The optical coupling module comprises a plurality of light source devices, an elliptical mirror module and a light guiding component. Each light source device includes a first directional light source. The first directional light source is used to provide a light. The elliptical mirror module is used to reflect light. The light guiding element is for receiving the reflected light.

In order to better understand the above and other aspects of the present invention, the following specific embodiments, together with the drawings, are described in detail below:

First embodiment

Please refer to FIG. 1 , which is a schematic diagram of the optical coupling module 100 of the first embodiment. The optical coupling module 100 includes at least one light source device 110, an elliptical mirror module 120, and a light guiding component 130. The light source device 110 is a module composed of at least one light emitting diode chip for providing a light. The elliptical mirror module 120 is a module composed of at least one elliptical mirror for reflecting light. The light guiding element 130 is used to guide light, such as an optical fiber. For example, the optical coupling module 100 can be used as an endoscope, a microscope, or the like.

In the embodiment, the light source device 110 includes a first directional light source 111. The first directional light source 111 has a first light emitting surface 1111. The first light-emitting surface 1111 may be composed of a single light-emitting diode wafer, or a plurality of light-emitting diode chips of the same color, or a plurality of light-emitting diode chips of a plurality of colors.

In addition, the light guiding element 130 has a light incident surface 131. The elliptical mirror module 120 includes a first elliptical mirror 121. The first elliptical mirror 121 has a first focus 121a and a second focus 121b. According to the characteristics of the ellipse, the light of the first focus 121a is reflected by the first elliptical mirror 121 and is focused on the second focus 121b. The first light-emitting surface 111 is located at the first focus 121a, and the light-incident surface 131 of the light-guiding element 130 is located near the second focus 121b. Therefore, the light emitted by the first light-emitting surface 1111 will be focused on the light-incident surface 131 of the light-guiding element 130. The light incident surface 131 of the light guiding element 130 can smoothly receive most of the light of the light source device 110.

In an embodiment, if the elliptical mirror module 120 is not used, and the first directional light source 111 is directly aligned with the light guiding member 130, only the light directly incident on the light guiding member 130 can be received, and the light of other angles is received. It cannot be received. In this embodiment, the elliptical mirror module 120 is designed to allow light in various directions to be received by the light guiding element 130.

As shown in Fig. 1, the light guiding element 130 of the present embodiment is inclined to the line L1 of the first focus 121a and the second focus 121b. In this way, most of the light can be incident on the light guiding element 130 at a nearly vertical angle, thereby increasing the light collecting efficiency of the light guiding element 130.

In terms of the direction and angle of the tilt, the first light exiting surface 1111 emits light upward, and the light guiding element 130 is also inclined upward. That is, the first light-emitting surface 1111 and the light-incident surface 131 face the same side of the line L1 of the first focus 121a and the second focus 121b. The light guiding element 130 has a numerical aperture value NA. When the tilting angle θ of the light guiding element 130 is smaller than the sine angle (sin NA) of the numerical aperture NA, most of the light of the first light emitting surface 1111 can be nearly vertical. The light is incident on the light guiding element 130, thereby increasing the light collecting efficiency of the light guiding element 130.

Further, the first light-emitting surface 1111 is substantially parallel to the line L1 of the first focus 121a and the second focus 121b. The first light-emitting surface 1111 located at the first focus 121a will form a first focus surface 1111' at the second focus 121b, and the width of the first focus surface 1111' is greater than the width of the first light-emitting surface 1111. The light guiding member 130 is disposed at any position of the first focusing surface 1111' to obtain a good light collecting effect.

In one embodiment, if the light guiding element 130 is vertically disposed by the dashed line 130', the diameter of the light guiding element 130 at this time must be equal to the width of the first focusing surface 1111'. In the present embodiment, the light guiding member 130 is disposed in an inclined manner such that the diameter of the light guiding member 130 is smaller than the width of the first focusing surface 1111', and a good light collecting effect can still be obtained.

Second embodiment

Please refer to FIG. 2 , which is a schematic diagram of the optical coupling module 200 of the second embodiment. The optical coupling module 200 of the present embodiment is different from the optical coupling module 100 of the first embodiment in that the light source device 210 includes a first directional light source 211 and a second directional light source 212, and the elliptical mirror module 220 includes a first elliptical mirror 221 and a second elliptical mirror 222, and the rest are not repeated.

As shown in FIG. 2, the first directional light source 211 has a first illuminating surface 2111, and the second directional light source 212 has a second illuminating surface 2121. The first light-emitting surface 2111 and the second light-emitting surface 2121 may be composed of a single light-emitting diode wafer, or respectively composed of a plurality of light-emitting diode chips of the same color, or a plurality of light-emitting diodes of multiple colors respectively. The composition of the wafer. The first elliptical mirror 221 has a first focus 221a and a second focus 221b. The second elliptical mirror 222 has a third focus 222a and a fourth focus 222b. The first light exit surface 2111 is located at the first focus 221a, and the second light exit surface 2121 is located at the third focus 222a. According to the characteristics of the ellipse, the light of the first focus 221a is reflected by the first elliptical mirror 221 and is focused on the second focus 221b. The light of the third focus 222a is reflected by the second elliptical mirror 222 and is focused on the fourth focus 222b. The first focus 221a of the first light-emitting surface 2111 is adjacent to the third focus 222a where the second light-emitting surface 2121 is located, and the light-incident surface 131 of the light-guiding element 130 is located adjacent to the second focus 221b and the fourth focus 222b, so The light emitted from the light exit surface 2111 and the second light exit surface 2121 will be focused on the light incident surface 131 of the light guiding element 130, so that the light incident surface 131 of the light guiding element 130 can smoothly receive most of the light of the light source device 210.

The first light-emitting surface 2111 and the second light-emitting surface 2121 of the present embodiment are substantially parallel to each other and parallel to the line L1' of the first focus 221a and the second focus 221b. Moreover, the first light-emitting surface 2111 faces away from the second light-emitting surface 2121.

Further, the light guiding element 130 of the present embodiment is substantially parallel to the line L1" of the first focus 221a and the second focus 221b. The line L1' is substantially parallel to the line L1". The light incident surface 131 of the light guiding element 130 is substantially perpendicular to the connecting lines L1', L1". Thus, the light guiding element 130 can simultaneously receive the light of the first light emitting surface 2111 and the second light emitting surface 2121.

Similarly, the first light-emitting surface 2111 at the first focus 221a will form a first focus surface 2111' at the second focus 221b, and the second light-emitting surface 2121 at the third focus 222a will form a second at the fourth focus 222b. Focusing surface 2121'. The light guiding element 130 of the embodiment is disposed at any position of the first focusing surface 2111' and the second focusing surface 2121' to obtain a good light collecting effect.

Third embodiment

Please refer to FIG. 3 , which illustrates a schematic diagram of the optical coupling module 300 of the third embodiment. The optical coupling module 300 of the present embodiment is different from the optical coupling module 100 of the first embodiment in the arrangement of the light source device 310 and the mirror module 320, and the rest of the same is not repeated.

As shown in FIG. 3, the elliptical mirror module 320 of the present embodiment includes a plurality of first elliptical mirrors 321 . Each of the first elliptical mirrors 321 has a first focus 321a and a second focus 321b. Each of the second focal points 321b substantially overlaps.

The optical coupling module 100 of this embodiment includes a plurality of light source devices 310. Such light source devices 310 extend around one of the central axes of one of the light guiding elements 130. Each light source device 310 includes a first directional light source 311. Each of the directional light sources 311 has a first light emitting surface 3111. The first light-emitting surfaces 3111 may be composed of a single light-emitting diode wafer, or a plurality of light-emitting diode chips of the same color, or a plurality of light-emitting diode chips of a plurality of colors.

The light of each of the first focal points 321a is reflected by the respective first elliptical mirrors 321 and is focused on the respective second focal points 321b. Each of the first light-emitting surfaces 3111 is located at each of the first focal points 321a. The light guiding elements 130 are located at the overlap of the respective second focal points 321b. Therefore, the light emitted from each of the first light-emitting surfaces 3111 will be focused on the light-incident surface 131 of the light-guiding element 130, so that the light-incident surface 131 of the light-guiding element 130 can smoothly receive most of the light of the light source device 310.

In other embodiments, the number of the first light-emitting surface and the elliptical mirror of the first directional light source may be two or more, as long as the space permits, as long as each of the first light-emitting surfaces is located in each of the elliptical mirrors. One of the focal points, and the light guiding element is located at the overlap of the other focus of all the elliptical mirrors, so that the light guiding element receives the light of all the first light emitting surfaces.

Fourth embodiment

Please refer to FIG. 4 , which is a schematic diagram of the optical coupling module 400 of the fourth embodiment. The optical coupling module 400 of the present embodiment is different from the optical coupling module 100 of the first embodiment in the arrangement of the light source device 410 and the mirror module 420, and the rest of the same is not repeated.

As shown in FIG. 4, the elliptical mirror module 420 of the present embodiment includes two first elliptical mirrors 421 and one second elliptical mirror 422. Each of the first elliptical mirrors 421 has a first focus 421a and a second focus 421b. The second elliptical mirror 422 has a third focus 422a and a fourth focus 422b. The second focus 421b and the third focus 422a substantially overlap.

The optical coupling module 400 includes a plurality of light source devices 410, and each of the light source devices 410 includes a first directional light source 411. Each of the directional light sources 411 has a first light exit surface 4111. The first light-emitting surfaces 4111 may be composed of a single light-emitting diode wafer, or a plurality of light-emitting diode chips of the same color, or a plurality of light-emitting diode chips of a plurality of colors.

After the light of each of the first focal points 421a is reflected by the first elliptical mirror 421, it is focused on the second focus 421b (ie, the third focus 422a). The light of the third focus 422a is reflected by the second elliptical mirror 422 and is focused on the fourth focus 422b. Each of the first light-emitting surfaces 4111 is located at the first focus 421a. The light guiding element 130 is located at the fourth focus 422b. Therefore, the light emitted from each of the first light-emitting surfaces 4111 will be focused on the light-incident surface 131 of the light-guiding element 130, so that the light-incident surface 131 of the light-guiding element 130 can smoothly receive most of the light of the light source device 410.

In other embodiments, the number of the first directional light sources may be one or three or more, and the number of the elliptical mirrors may be two or more, as long as the space permits, as long as the first directional light sources are A light-emitting surface is located at one of the focal points of each of the outer elliptical mirrors, and the other focus of each of the outer elliptical mirrors substantially overlaps with one of the focal points of the central elliptical mirror, and the light guiding element is located at the center of the elliptical mirror The focus allows the light guide element to receive light from all of the light exiting surfaces.

Fifth embodiment

Please refer to FIG. 5 , which is a schematic diagram of the optical coupling module 500 of the fifth embodiment. The optical coupling module 500 of the present embodiment is different from the optical coupling module 100 of the first embodiment in that the optical coupling module 500 further includes a coupling coupling module 540, and the rest of the same is not repeated.

As shown in FIG. 5, the light source device 510 of the embodiment includes a first directional light source 511 and a second directional light source 512. The first directional light source 511 has a first light emitting surface 5111, and the second directional light source 512 has a second light emitting surface 5121. The first light-emitting surface 5111 and the second light-emitting surface 5121 may be composed of a single light-emitting diode wafer, or a plurality of light-emitting diode chips of the same color, or a plurality of light-emitting diode chips of a plurality of colors. composition.

The optical coupling module 500 includes a coupling light conversion module 540. The light coupling module 540 is configured to collect and conduct light from the first light emitting surface 5111 and the second light emitting surface 5121 to the light guiding element 130. As a result, the efficiency of coupling light rays in different directions to the light guiding element 130 can be effectively improved.

The optical coupling module 540 of the fifth embodiment can be applied to the optical coupling modules 100, 200, 300, and 400 of the first to fourth embodiments, so that the elliptical mirror reflection module is not illustrated, and various matching manners are used. Can be based on design needs.

In addition, the coupling light conversion module 540 of the embodiment has a first filter surface 541 and a second filter surface 542. The first filter surface 541 and the second filter surface 542 respectively filter the light of the first light exit surface 5111 and the second light exit surface 5121. When the light of the first light-emitting surface 5111 and the second light-emitting surface 5121 is white light, the light of the first light-emitting surface 5111 passes through the first filter surface 512 and is filtered into the first color light, and the light of the second light-emitting surface 5121. After passing through the second filter surface 542, it will be filtered into a second color light. In this way, color light of various colors of the light guiding element 130 can be provided.

The embodiments of the above various embodiments can be matched with each other. For example, the arrangement of the light-emitting surface of the second embodiment can be applied to the third embodiment or the fourth embodiment. The arrangement of the elliptical mirror module of the third embodiment can be applied to the fourth embodiment. The various embodiments are not separated from the technical scope of the present invention.

In summary, although the present invention has been disclosed above by way of example, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field of the present invention can make various changes and refinements without departing from the spirit and scope of the present case. Therefore, the scope of protection of this case is subject to the definition of the scope of the patent application attached.

100, 200, 300, 400, 500. . . Optical coupling module

110, 210, 310, 410, 510. . . Light source device

111, 211, 311, 411, 511. . . First directional light source

1111, 2111, 3111, 4111, 5111. . . First illuminating surface

1111’, 2111’. . . First focus surface

120, 220, 320, 420. . . Elliptical mirror module

121, 221, 321, 421. . . First elliptical mirror

121a, 221a, 321a, 421a. . . First focus

121b, 221b, 321b, 421b. . . Second focus

130. . . Light guide element

130’. . . dotted line

131. . . Glossy surface

212, 512. . . Second directional light source

2121, 5121. . . Second illuminating surface

2121’. . . Second focus surface

222, 422. . . Second elliptical mirror

222a, 422a. . . Third focus

222b, 422b. . . Fourth focus

540. . . Coupled optical adapter

541. . . First filter surface

542. . . Second filter surface

L1, L1', L1"... connection

θ. . . slope

FIG. 1 is a schematic view showing the optical coupling module of the first embodiment.

FIG. 2 is a schematic view showing the optical coupling module of the second embodiment.

FIG. 3 is a schematic view showing the optical coupling module of the third embodiment.

FIG. 4 is a schematic view showing the optical coupling module of the fourth embodiment.

FIG. 5 is a schematic view showing the optical coupling module of the fifth embodiment.

100. . . Optical coupling module

110. . . Light source device

111. . . First directional light source

1111. . . First illuminating surface

1111’. . . First focus surface

120. . . Elliptical mirror module

121. . . First elliptical mirror

121a. . . First focus

121b. . . Second focus

130. . . Light guide element

130’. . . dotted line

131. . . Glossy surface

L1. . . The connection between the first focus and the second focus

θ. . . slope

Claims (16)

An optical coupling module comprising: a plurality of light source devices, each of the light source devices comprising: a first directional light source for providing a light; an elliptical mirror module for reflecting the light; and a light guiding component, Used to receive the reflected light. The optical coupling module of claim 1, wherein the elliptical mirror module comprises a first elliptical mirror, the first elliptical mirror having a first focus and a second focus, the first directivity The light source has a first light exiting surface, the first light exiting surface is located at the first focus, and the light guiding element is located at the second focus. The optical coupling module of claim 2, wherein the light guiding element is inclined to a line connecting the first focus and the second focus. The optical coupling module of claim 3, wherein the light source devices extend an extension of one of the central axes of the light guiding member. The optical coupling module of claim 2, wherein the first light exiting surface is substantially parallel to the line connecting the first focus and the second focus. The optical coupling module of claim 2, wherein the elliptical mirror module further comprises a second elliptical mirror having a third focus and a fourth focus, each of the light source devices The second directional light source further includes a second illuminating surface, the second illuminating surface is located at the third focus, and the light guiding element is located at the fourth focus. The optical coupling module of claim 6, wherein the first focus overlaps with the third focus, and the second focus overlaps the fourth focus. The optical coupling module of claim 7, wherein the second illuminating surface faces away from the first illuminating surface. The optical coupling module of claim 7, wherein the light guiding element is substantially parallel to the line connecting the first focus and the second focus. The optical coupling module of claim 1, wherein the elliptical mirror module comprises a first elliptical mirror and a second elliptical mirror, the first elliptical mirror having a first focus and a second focus The second elliptical mirror has a third focus and a fourth focus. The second focus substantially overlaps the third focus. The first directional light source has a first illuminating surface, and the first illuminating surface is located at the second illuminating surface. The first focus is that the light guiding element is located at the fourth focus. The optical coupling module of claim 1, wherein each of the light source devices further comprises a second directional light source, the first directional light source has a first illuminating surface, and the second directional light source has a The second light-emitting surface, each of the light source devices further includes: a coupling light-switching module for collecting and conducting the light of the first light-emitting surface and the second light-emitting surface to the light guiding element. The optical coupling module of claim 11, wherein the coupling module has a first filter surface and a second filter surface, the first filter surface and the second filter surface For filtering the light of the first light emitting surface and the second light emitting surface, respectively. The optical coupling module of claim 1, wherein the first light-emitting surface of the first directional light source is composed of a single light-emitting diode chip. The optical coupling module of claim 1, wherein the first light-emitting surface of the first directional light source is composed of a plurality of light-emitting diode chips. The optical coupling module of claim 14, wherein the light emitting diode chips are of the same color. The optical coupling module of claim 14, wherein the light emitting diode chips are multi-colored.