LIGHT SOURCE MODULE

Abstract

Light source module comprising: a first light source (1) generating a first beam (10) and comprising: a second light source (12) generating a second beam (120), a third light source (14) generating a third beam (140), a first beam splitter (16) arranged along the path of the second beam (120) and the third beam (140), such that the second light source (12) is on one side of the first beam splitter (16) and the third light source (14) is on the other side of the first beam splitter (16), which transmits the second beam (120) and reflects the third beam (140) and mixes the second beam (120) and the third beam (140) to form the first beam (10), a fourth light source (4) generating a fourth beam (40), a second beam splitter (7) arranged along the path of the first is arranged in beam (10) and the fourth beam (40),such that the first light source (1) is arranged on one side of the second beam splitter (7) and the fourth light source (4) is arranged on the other side of the second beam splitter (7), which reflects the first beam (10) and transmits the fourth beam (40) and mixes the first beam (10) and the fourth beam (40) to form a mixed beam (ML), and an optical processing device (9) arranged along the path of the mixed beam (ML), wherein one end receives the mixed beam (ML) and the other end projects the mixed beam (ML), characterized in that the optical processing device (9) tapers gradually from one end of it to its other end, and the second beam (120) is a red beam and the third beam (140) is a mixed beam of a blue beam and an ultraviolet beam, wherein the fourth beam (40) is a yellow beam,such that the first beam (10) is a mixed beam of a red beam, a blue beam and an ultraviolet beam, and the mixed beam (ML) in which the first beam (10) and the fourth beam (40) are mixed is a mixed beam of a white beam and an ultraviolet beam.

Description

FIELD OF THE INVENTIONThe present invention relates generally to a light source module, and more particularly to an optical module combining high color reproduction and ultraviolet optical properties.BACKGROUND OF THE INVENTIONDocument DE 10 2005 010 606 A1 relates to a method for producing a compact optical concentrator and applications thereof. Furthermore, a conventional system and method for producing a balanced white LED light source is known from the document US 2009 / 0 284 965 A1. Moreover, the document disclosesDE 10 2005 054 184 A1 discloses a multi-spectral illumination device and optical devices, in particular imaging, examination, observation and projection devices, having such an illumination device and essentially shows a light source module according to the preamble of claim 1.Document DE 10 2005 054 184 A1 describes an illumination device having four semiconductor radiation sources for emitting optical radiation in respectively different emission wavelength ranges. The document DE 10 2005 010 606 A1 describes a method for producing compact light concentrators and their use. Document US 2009 / 0 284 965 A1 describes an LED light system for emitting essentially white light.The illumination device of an endoscope generates white light by using a plurality of light sources having different colors together with lenses and beam splitters. A single light source or a plurality of light sources excites phosphors, and the excited light is mixed by lenses and beam splitters to generate white light. Alternatively, a plurality of light sources are first combined before phosphors are excited, and the generated light is mixed by lenses and beam splitters to form white light for an endoscope apparatus.Unfortunately, the color rendering of the white light produced according to the prior art is generally inferior and unable to image the true appearance of the inspected object. In addition, for applications in an endoscope to inspect with an endoscope whether a patient's nidu (for example, tissue, cells, or blood in a human body) appears abnormal, it is not sufficient to apply simple white light illumination for medical personnel to judge the symptoms thereof. In other words, a special light source for exhibiting symptoms is required before effective pathological information can be obtained. In addition to the color rendering problem, some disadvantages for particular lighting applications must be improved still further.SUMMARYIt is an object of the present invention to provide a light source module that combines a first beam (a mixed beam consisting of red, blue and ultraviolet rays) generated from a first light source and a fourth beam (a yellow beam) generated from a fourth light source to generate a mixed white beam via the function of a second beam splitter. As a result, the color reproduction of the white light according to the prior art with specific optical properties can be improved. Thereby, the application efficiency of the light source module can be improved.In order to achieve the above object and effectiveness, the present invention discloses a light source module according to claim 1.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 shows the schematic diagram 1 according to the first exemplary embodiment of the present invention; FIG. 2 shows the schematic diagram 2 according to the first exemplary embodiment of the present invention; FIG. 3 shows the schematic diagram 1 according to the second exemplary embodiment of the present invention; FIG. 4 shows the schematic diagram 2 according to the second exemplary embodiment of the present invention; FIG. 5 is a schematic diagram showing the third embodiment of the present invention.DETAILED DESCRIPTIONReferring to FIG. 1, the present invention provides a light source comprising:a first light source 1 generating a first beam 10 and comprising:a second light source 12 generating a second beam 120,a third light source 14 that generates a third beam 140,a first beam splitter 16 disposed on the path of the second beam 120 and the third beam 140 such that the second light source 12 is disposed on one side of the first beam splitter 16 and the third light source 14 is disposed on the other side of the first beam splitter 16 that transmits the second beam 120 and reflects the third beam 140 and mixes the second beam 120 and the third beam 140 to form the first beam 10,a fourth light source 4 which generates a fourth beam 40,a second beam splitter 7 disposed on the path of the first beam 10 and the fourth beam 40 such that the first light source 1 is disposed on one side of the second beam splitter 7 and the fourth light source 4 is disposed on the other side of the second beam splitter 7 that reflects the first beam 10 and transmits the fourth beam 40 and mixes the first beam 10 and the fourth beam 40 to form a mixed beam ML, andan optical processing device 9 disposed on the path of the mixed beam ML gradually tapering from one end to the other end, the one end receiving the mixed beam ML and the other end projecting the mixed beam ML.The optical processing device 9 includes a light receiving portion 90 and a light emitting portion 92, one end of the light receiving portion 90 corresponds to the mixed beam ML, and the other end thereof is connected to the light emitting portion 92. The optical processing device 9 gradually narrows from the light receiving portion 90 to the light emitting portion 92 The light receiving portion 90 is used to receive the mixed beam ML. The light emitting portion 92 is used to project the mixed beam ML.Referring to FIG. 2, the first beam splitter 16 includes a first surface 160 and a second surface 162. The second beam 120 is transmitted through the first surface 160 and the second surface 162 and mixed with the third beam 140 reflected from the second surface 162 to form the first beam 10. The second beam splitter 7 comprises a third surface 70 and a fourth surface 72. The first beam 10 is reflected by the third surface 70. The fourth beam 40 is transmitted through the third surface 70 and the fourth surface 72 and mixed with the first beam 10 to form the mixed beam ML. The first beam 10 is a mixed beam including red, blue and ultraviolet rays. The second beam 120 is a red beam. The third beam 140 is a mixed beam including blue and ultraviolet rays. The fourth beam is the yellow light. The mixed beam ML is a mixed beam formed by white and ultraviolet rays.Reference is made again to FIGS. 1 and 2. The operation of the present invention will be described below. The first light source 1 and the fourth light source 4 can illuminate the second beam splitter 7 simultaneously or sequentially. First, the second light source 12 and the third light source 14 may illuminate the first beam splitter 16 simultaneously or sequentially. The second light source 12 and the third light source 14 project the second beam 120 and the third beam 140, respectively, to the first beam splitter 16. the third beam 140 is reflected from the second surface 162, toward the direction of the second beam splitter 7. the second beam 120 is directly transmitted through the first surface 160 and the second surface 162 and mixed with the third beam 140 to form the first beam 120 traveling toward the direction of the second beam splitter 7. In other words, by using the above structure, the first beam 10 for subsequent processing can be projected to the second beam splitter 7.Next, the first light source 1 and the fourth light source 4 project the first beam 10 and the fourth beam 40 to the second beam splitter 7. the first beam 10 is reflected by the third surface 70 and travels toward the direction of the optical processing device 9. the fourth beam 40 is transmitted through the third surface 70 and the fourth surface 72 and travels toward the direction of the optical processing device 9. thereafter, the first beam 10 and the fourth beam 40 are mixed by the function of the second beam splitter 7 to form the mixed beam ML, which is then received and used by the optical processing device 9.As an optical fiber, the light receiving portion 90 of the optical processing device 9 receives the mixed beam ML and then projects the mixed beam ML via the light emitting portion 92 By using the gradually tapered structure (or the cone structure) of the optical processing device 9, the range for projecting the mixed beam ML from the light emitting portion 92 can be wider, thereby enlarging the observable range. For the endoscope according to the related art, the size of the inspection equipment inserted into a human body is limited. Therefore, the area observable to the medical worker provided by the light projected from the optical processing device 4 is larger, and the illumination efficiency is also improved. It is not necessary to change the structure of the endoscope apparatus in order to provide broader illumination.Further, the mixed beam ML improves the problem of inferior color resolution of white light according to the prior art. By mixing the first beam 10 and the fourth beam 40, the overall color resolution of the white light can be improved. The light source module according to the present invention can function as the illumination device for endoscope equipment. Thanks to the high color resolution of the mixed beam ML, when illuminating the symptoms for diagnosis by the medical staff, the true appearance of the structures of the human body can be provided and hence false judgment by the medical staff due to low color resolution can be avoided. In addition, the first beam 10 includes the ultraviolet light, which allows the mixed beam ML to have the specific optical characteristics provided by the ultraviolet light. Some special symptoms can be visualized by the illumination by the mixed beam ML, thereby avoiding an in shortfall of the medical staff. Thereby, informed pathological information can be obtained.Referring to FIGS. 3 and 4, the difference between the second embodiment and the first embodiment according to the present invention is that the third light source 14 according to the second embodiment includes a fifth light source 142, a sixth light source 144, and a third beam splitter 146. The fifth light source 142 generates a fifth beam 1420. The sixth light source 144 generates a sixth beam 1440. The third beam splitter 146 is disposed on the path of the fifth beam 1420 and the sixth beam 1440 such that the fifth light source 142 is disposed on one side of the third beam splitter 146 and the sixth light source 144 is disposed on the other side of the third beam splitter 146. The third beam splitter 146 reflects the fifth beam 1420 and transmits the sixth beam 1440, and therefore mixes the fifth beam 1420 and the sixth beam 1440 to form the third beam 140.The third beam splitter 146 includes a fifth surface 1460 and a sixth surface 1462. The sixth beam 1440 is transmitted through the fifth surface 1460 and the sixth surface 1462 and mixed with the fifth beam 1420 reflected from the fifth surface 1462 to form the third beam 140. The fifth beam 1420 is an ultraviolet beam. The sixth beam 1440 is a blue beam.Regarding the mechanism of the third light source 14 according to the second embodiment, the fifth light source 142 and the sixth light source 144 may illuminate the third beam splitter 146 simultaneously or sequentially. The fifth light source 142 and the sixth light source 144 project the fifth beam 1420 and the sixth beam 1440 to the third beam splitter 146, respectively. The fifth beam 1420 is reflected from the fifth surface 1462 toward the direction of the first beam splitter 16. The sixth beam 1440 is directly transmitted through the fifth surface 1460 and the sixth surface 1462 and mixed with the fifth beam 1420 to form the third beam 140 traveling toward the direction of the first beam splitter 16. In other words, by using the above structure according to the second embodiment according to the present invention, the third beam 140 for the subsequent processing can be projected to the first beam splitter 16.Referring to FIG. 5, the difference between the third embodiment and the first embodiment is that the fourth light source 4 according to the third embodiment includes a seventh light source 42 and a fluorescent plate 44. The seventh light source 42 generates a seventh beam 420. The fluorescent plate 44 is disposed on the path where the second beam splitter reflects the seventh beam 420. The fluorescent plate 44 further includes a reflecting mirror 440, a phosphor 442, and a light concentrating lens 444. The phosphor 442 is disposed on one side of the reflection mirror 440. The second beam splitter 7 reflects the seventh beam 420 to travel to the fluorescent plate 44. Then, the seventh beam 420 is reflected by the phosphor 442 and the reflecting mirror 442 to form the fourth beam 40. The light concentrating lens 444 is disposed at a side of the reflecting mirror 440 and the phosphor 442 to cover the phosphor 442 and concentrate the light (the seventh beam 420) projected toward the fluorescent plate 44 toward the phosphor 442.The seventh beam 420 is a blue beam formed by the matrix of a plurality of laser beams. The phosphor 442 is composed of yellow fluorescent powders. The material of the phosphor 442 included in the fluorescent plate 44 may be any material that is stimulable by the seventh beam 420 and forms the fourth beam 40 (yellow beam). Preferably, the phosphor is comprised of, but not limited to, yellow powders.According to the third embodiment, the mechanism of the second beam splitter 7 on the first beam 10 is identical to the mechanism on the fourth beam 40. therefore, the generation of the fourth beam 40 is taken as an example. The fourth beam 40 is generated by the seventh beam 420 from the seventh light source 42 reflected from the fourth surface 72 and reflected and excited by the fluorescent plate 44. The fourth beam 40 is reflected and travels to the second beam splitter 7, After being transmitted through the third and fourth surfaces 70, 72, the fourth beam 40 travels to the optical processing device 9, Thereafter, the first beam 10 and the fourth beam 40 are mixed by the second beam splitter 7 to form the mixed beam ML, which is then received and used by the optical processing device 9.According to the above embodiments, the light sources (the first to seventh) can be arranged according to the lighting requirements. It is not limited to adopting a plurality of laser beams or light emitting diodes (LEDs) arranged in a matrix, or a single laser beam or LED. In addition, the beam splitters (the first to the third) are designed to allow direct transmission through the light having a specific wavelength and reflect the light having a different specific wavelength and thereby project or transmit it to other devices. They are changed according to design requirements and light sources. In addition, the second light source 12, the fifth light source 142, and the sixth light source 144 are interchangeable. For example, the second light source 12 may be disposed at a side of the third beam splitter 146. The fifth light source 142 may be disposed at a side of the first beam splitter 16. Then, the fifth surface 1460 of the third beam splitter 146 may reflect the second beam 120 to travel to the first beam splitter 16. Meanwhile, the first surface 160 and the second surface 162 of the first beam splitter 16 may transmit the fifth beam 1420 to directly travel to the second beam splitter 7.

Claims

A light source module comprising: a first light source (1) generating a first beam (10) and comprising: a second light source (12) generating a second beam (120); a third light source (14) generating a third beam (140); a first beam splitter (16) disposed on the path of the second beam (120) and the third beam (140) such that the second light source (12) is disposed on one side of the first beam splitter (16) and the third light source (14) is disposed on the other side of the first beam splitter (16) transmitting the second beam (120) and reflecting the third beam (140) and mixing the second beam (120) and the third beam (140) to form the first beam (10); a fourth light source (4) generating a fourth beam (40); a second beam splitter (7), which is disposed on the path of the first beam (10) and the fourth beam (40) so that the first light source (1) is disposed on one side of the second beam splitter (7) and the fourth light source (4) is disposed on the other side of the second beam splitter (7) which reflects the first beam (10) and transmits the fourth beam (40) and mixes the first beam (10) and the fourth beam (40) to form a mixed beam (ML), and an optical processing device (9) disposed on the path of the mixed beam (ML), wherein the one end receives the mixed beam (ML) and the other end projects the mixed beam (ML), characterized in that the optical processing device (9) gradually narrows from one end thereof to the other end thereof, and the second beam (120) is a red beam, and the third beam (140) is a mixed beam of a blue beam and an ultraviolet beam, wherein the fourth beam (40) is a yellow beam, such that the first beam (10) is a mixed beam of a red beam, a blue beam, and an ultraviolet beam, and the mixed beam (ML) in which the first beam (10) and the fourth beam (40) are mixed is a mixed beam of a white beam and an ultraviolet beam.The light source module of claim 1, wherein the first beam splitter (16) comprises a first surface (160) and a second surface (162), and the second beam (120) is transmitted through the first surface (160) and the second surface (162) and then mixed with the third beam (140) reflected from the second surface (162) to form the first beam (10).The light source module of claim 1, wherein the third light source (14) comprises: a fifth light source (142) that generates a fifth light beam (1420); a sixth light source (144) that generates a sixth light beam (1440); and a third beam splitter (146) disposed on the path of the fifth beam (1420) and the sixth beam (1440) such that the fifth light source (142) is disposed on one side of the third beam splitter (146) and the sixth light source (144) is disposed on the other side of the third beam splitter (146) that reflects the fifth beam (1420) and transmits the sixth beam (1440) and mixes the fifth beam (1420) and the sixth beam (1440) to form the third beam (140).The light source module of claim 3, wherein the fifth beam (1420) is an ultraviolet beam and the sixth beam (1440) is a blue beam.The light source module of claim 3, wherein the third beam splitter (146) includes fifth and sixth surfaces (1460, 1462), and the sixth beam (1440) is transmitted through the fifth surface (1460) and the sixth surface (1462), and then mixed with the fifth beam (1420) reflected from the fifth surface (1460) to form the third beam (140).The light source module according to claim 1, wherein the second beam splitter (7) includes a third surface (70) and a fourth surface (72), the first beam (10) is reflected by the third surface (70), and the fourth beam (40) is transmitted through the third surface (70) and the fourth surface (72) and mixed with the first beam (10) to form the mixed beam (ML).The light source module according to claim 1, wherein the fourth light source (4) comprises: a seventh light source (42) generating a seventh beam (420); and a fluorescent plate (44) disposed on the path where the second beam splitter (7) reflects the seventh beam (420), and comprises a reflection mirror (440) and a phosphor (442), wherein the phosphor (442) is disposed on a side of the reflection mirror (440), and the second beam splitter (7) reflects the seventh beam (420) to travel to the fluorescent plate (44), and then the seventh beam (420) is reflected by the phosphor (442) and the reflection mirror (440) to form the fourth beam (40).The light source module according to claim 7, wherein the seventh beam (420) is a blue beam formed by the matrix of a plurality of laser beams, and the phosphor (442) is a yellow fluorescent powder.

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