An LED multi-spectrum common light path light source lighting device

Abstract

The present invention discloses an LED multi-spectrum common light path light source lighting device, comprising a multi-band LED light source, a mobile platform and an optical element, wherein the multi-band LED light source is fixedly mounted on the mobile platform, the mobile platform and the optical element are both mounted on a base, and the light-emitting surface of the multi-band LED light source is arranged opposite to the optical element. Compared with the prior art, the present invention has the advantages of simple structure, low difficulty in installation and adjustment, stable and reliable control mode, economical cost and high light energy utilization rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting, and relates to a multi-spectral common light path LED light source lighting device, which can realize that light of different spectrum bands emitted by an LED light source is emitted from the same optical element. Background Art

[0002] Traditional fluorescence microscopy illumination sources mostly use wide-band light sources, such as xenon lamps, halogen lamps, etc., and use multiple filter boxes of different bands to achieve light excitation of different wavelengths. Obviously, the energy utilization rate is very low, and each excitation light only accounts for a small part of the total light energy. Moreover, filter boxes of different bands not only increase the volume of the system, but also increase the cost. At present, it has been replaced by LED light sources with low energy consumption and small size, but the light emitted by the LED light source itself is a narrow-band spectrum, and a combination of LED light sources of multiple bands is required to meet the lighting application of fluorescence microscopes.

[0003] In order to ensure that the optical axes of the lights of each band are consistent in the emission direction, the existing technologies mostly realize the combination of multiple bands of light in the following ways: 1) Multiple bands of light are coupled through dichroic mirrors or corners, wherein each band requires a separate optical collimation system, and multiple bands of light are coupled by beam combining. Beam combining requires that the optical axes of the light sources of each band are consistent in the emission direction, which is difficult and costly to install and adjust; 2) The base is moved by electromagnetic control, so that the multi-band light source can be coupled into an optical element, and the base is moved by electromagnetic control, so that the light sources of different bands can pass through the same optical collimation system by changing the position of the base. However, repeated base collisions are unstable; 3) Multiple bands of light sources pass through the same lens, and multiple bands share a set of optical collimation systems at the same time. Light sources of different bands share the entrance of a set of optical elements at the same time, and the collected light energy will be much lower than the previous two solutions. Summary of the invention

[0004] In view of the above-mentioned shortcomings or deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an LED multi-spectrum common light path light source lighting device with simple structure, easy installation and adjustment, stable and reliable control method, economical cost and high light energy utilization rate.

[0005] In order to solve the above technical problems, the present invention has the following structure:

[0006] An LED multi-spectrum common light path light source lighting device comprises a multi-band LED light source, a mobile platform and an optical element, wherein the multi-band LED light source is fixedly mounted on the mobile platform, the mobile platform and the optical element are both mounted on a base, and the light emitting surface of the multi-band LED light source is arranged opposite to the optical element.

[0007] The movable platform comprises a horizontal movable component and a vertical movable component. The horizontal movable component is fixedly mounted on the base. The vertical movable component is fixedly connected to the multi-band LED light source. The horizontal movable component and the vertical movable component are fixedly connected via a support plate.

[0008] The horizontal movement assembly includes a first guide rod, a first guide block, a first adjusting screw, a first nut and a first motor, wherein both ends of the first guide rod are fixedly mounted on the base through a first support seat; the first guide block matched with the first guide rod is fixedly mounted on the support plate; one end of the first adjusting screw is fixedly connected to the first motor, and the other end is threadedly connected to the first nut; the first nut is fixedly mounted on the support plate through a first nut mounting seat.

[0009] The base is also provided with a first optical coupler switch, and the support plate is also provided with a first baffle used in conjunction with the first optical coupler switch.

[0010] The vertical moving assembly includes a second guide rod, a second guide block, a second adjusting screw, a second nut, a second motor and a second support seat fixedly mounted on the support plate, the second guide rod is vertically mounted on the second support seat, the second guide block matching and connected to the second guide rod is fixedly mounted on one side of the multi-band LED light source, one end of the second adjusting screw is threaded through the support plate and fixedly connected to the second motor, and the other end is threadedly connected to the second nut; the second nut is fixedly mounted on the other side of the multi-band LED light source through a second nut mounting seat.

[0011] A second optical coupler switch is also provided on the support plate, and a second baffle used in conjunction with the second optical coupler switch is provided on the heat sink of the multi-band LED light source.

[0012] The optical element comprises a square lens, a collimating lens group and a support fixedly mounted on the base, the collimating lens group is mounted on the support, and the square lens is arranged on the light incident side of the collimating lens group.

[0013] A focusing mechanism is also provided on the light-emitting side of the optical element.

[0014] The multi-band LED light source comprises LED chips of multiple bands, a substrate, a heat sink and connectors. The LED chip is packaged on the substrate, and a plurality of connectors are also arranged on the substrate fixedly mounted on the heat sink.

[0015] A fan is also installed on the back of the heat sink.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] The present invention can realize the movement of the center point of LED chips of different wavebands through the moving platform, so as to achieve the effect of coinciding with the optical axis of the optical element;

[0018] Compared with the method of optically combining LED chips of different wavelength bands, the present invention has great improvements in installation and cost, which can not only bring higher light power to fluorescence microscopy illumination, but also greatly reduce the cost of the lighting device;

[0019] The first limiting mechanism or the second limiting mechanism in the present invention ensures that the moving platform can be accurately positioned, so that the multi-band LED light source can move LED chips in different areas to the target area according to the microscopic lighting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 : A stereoscopic diagram of the LED multi-spectrum common light path light source lighting device of the present invention;

[0022] Figure 2 : A cross-sectional view of the LED multi-spectrum common light path light source lighting device of the present invention;

[0023] Figure 3 : Front view of the LED multi-spectrum common light path light source lighting device of the present invention;

[0024] Figure 4 : Rear view of the LED multi-spectrum common light path light source lighting device of the present invention. DETAILED DESCRIPTION

[0025] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0026] like Figures 1 to 4 As shown, the LED multi-spectrum common light path light source lighting device of this embodiment includes a multi-band LED light source 10, a moving platform 20 and an optical element 30. The multi-band LED light source 10 is fixedly mounted on the moving platform 20. The moving platform 20 and the optical element 30 are both mounted on a base 40. The light-emitting surface of the multi-band LED light source 10 is arranged opposite to the optical element 30. In this embodiment, the center point of the LED chip 11 of different bands can be moved by the moving platform 20, so as to achieve the effect of coinciding with the optical axis of the optical element 30; compared with the LED chips 11 of different bands through optical beam combining, this embodiment has great improvements in installation and cost; this embodiment can not only bring higher light power to fluorescence microscopy illumination, but also greatly reduce the cost of the lighting device.

[0027] In this embodiment, the movable platform 20 includes a horizontal movable component 21 and a vertical movable component 22. The horizontal movable component 21 is fixedly mounted on the base 40. The vertical movable component 22 is fixedly connected to the multi-band LED light source 10. The horizontal movable component 21 and the vertical movable component 22 are fixedly connected via a support plate 23.

[0028] The horizontal moving assembly 21 includes a first guide rod 211, a first guide block 212, a first adjusting screw 213, a first nut 214 and a first motor 215. The two ends of the first guide rod 211 are fixedly mounted on the base 40 through a first support seat 216 respectively; the first guide block 212 matched with the first guide rod 211 is fixedly mounted on the support plate 23; one end of the first adjusting screw 213 is fixedly connected to the first motor 215, and the other end is threadedly connected to the first nut 214; the first nut 214 is fixedly mounted on the support plate 23 through a first nut mounting seat. The first motor 215 drives the first adjusting screw 213 to rotate, thereby generating a horizontal translation force on the support plate 23 through the first nut 214. The horizontal moving assembly 21 can ensure the linear motion of the multi-band LED light source 10 in the horizontal direction.

[0029] Furthermore, the base 40 is also provided with a first optical coupler switch, and the support plate 23 is also provided with a first baffle used in conjunction with the first optical coupler switch. The first optical coupler switch and the first baffle cooperate with each other as a first limiting mechanism to ensure that the movable platform 20 can be accurately positioned, so that the multi-band LED light source 10 can move the LED chips 11 in different areas to the target area according to the microscopic lighting requirements. The first limiting mechanism can be set at the initial position or the target position, and can be flexibly installed according to actual conditions. In this embodiment, the first limiting mechanism can also be replaced by a servo positioning system.

[0030] The first baffle moves to the first optical coupler switch on the base 40 along with the horizontal movement of the support plate 23. The first optical coupler switch has a feedback signal to the controller, and the controller will issue an instruction to stop the horizontal movement.

[0031] The vertical moving assembly 22 includes a second guide rod 221, a second guide block 222, a second adjusting screw 223, a second nut 224, a second motor 225, and a second support seat 226 fixedly mounted on the support plate 23. The second guide rod 221 is vertically mounted on the second support seat 226. The second guide block 222 matched with the second guide rod 221 is fixedly mounted on one side of the multi-band LED light source 10. One end of the second adjusting screw 223 is threaded through the support plate 23 and fixedly connected to the second motor 225, and the other end is threadedly connected to the second nut 224. The second nut 224 is fixedly mounted on the other side of the multi-band LED light source 10 through the second nut mounting seat. The second motor 225 drives the second adjusting screw 223 to rotate, thereby generating a vertical translation force on the heat sink 13 through the second nut 224. The vertical moving assembly 22 can ensure the linear motion of the multi-band LED light source 10 in the vertical direction.

[0032] Furthermore, a second optical coupler switch is also provided on the support plate 23, and a second baffle used in conjunction with the second optical coupler switch is provided on the heat sink 13 of the multi-band LED light source 10. The cooperation between the second optical coupler switch and the second baffle is used as a second limiting mechanism to ensure that the movable platform 20 can be accurately positioned, so that the multi-band LED light source 10 can move the LED chips 11 in different areas to the target area according to the microscopic lighting requirements. The second limiting mechanism can be set at the initial position or the target position, and can be flexibly installed according to actual conditions. In this embodiment, the second limiting mechanism can also be replaced by a servo positioning system.

[0033] The second baffle moves to the second optical coupler switch on the support plate 23 along with the vertical movement of the heat sink 13. The second optical coupler switch has a feedback signal to the controller, and the controller will issue an instruction to stop the vertical movement.

[0034] Under the movement of the horizontal moving assembly 21 and the vertical moving assembly 22, the heat sink 13 returns to the first optical coupler switch or the second optical coupler switch after horizontal and vertical movement, which is a zeroing operation, and can ensure that there is no cumulative error in the movement.

[0035] In this embodiment, each dimension of movement is coordinated by a motor and a linear guide rail to ensure the linearity of the movement in this dimension.

[0036] In this embodiment, the movable platform 20 may also be provided with a fine-tuning mechanism along the axial direction of the optical axis, and the fine-tuning mechanism can adjust the distance between the LED chip 11 and the square lens 31. This can be used to compensate for the error caused by machining or adjustment, resulting in the defect of reduced efficiency due to excessive distance between the LED chip 11 and the square lens 31.

[0037] An optical element 30 is arranged in front of the multi-band LED light source 10, so that the light emitted by the LED chip 11 of one band can be emitted through the optical element 30. The base of the optical element 30 and the base of the moving stage 20 are fixed on the same substrate. The optical element 30 always remains stationary relative to the substrate. The multi-band LED light source 10 moves along the heat sink plane of the moving stage 20 according to the requirements of fluorescence microscopy illumination, so that the LED chips 11 of different bands can pass through the optical element 30 in front, or the center of the LED chips 11 of different bands is located on the optical axis of the optical element 30.

[0038] The optical element 30 includes a square lens 31, a collimating lens group 32, and a support 33 fixedly mounted on the base 40, wherein the collimating lens group 32 is mounted on the support 33, and the square lens 31 is arranged on the light incident side of the collimating lens group 32. The square lens 31 can collect the light emitted by the LED light source and evenly mix the light emitted by the LED chip; the collimating lens group 32 can complete the projection of light.

[0039] A focusing mechanism 50 is also provided on the light-emitting side of the optical element 30. The focusing mechanism 50 can adjust the angle of the emitted light spot.

[0040] The multi-band LED light source 10 includes LED chips 11 of multiple bands, a substrate 12, a heat sink 13 and a connector 14. The LED chip 11 is packaged on the substrate 12 to form a multi-band LED light source, and each band contains one or more LED chips 11. The substrate 12 fixedly mounted on the heat sink 13 is also provided with a plurality of connectors 14 connected to an external control circuit. Each LED chip 11 integrated in each LED light source 10 is individually controlled by the external control circuit to realize operations such as lighting, turning off, and periodic lighting. In this embodiment, LED chips 11 of different bands are arranged at a certain interval.

[0041] Thermally conductive silicone grease is applied between the substrate 12 and the heat sink 13 , and the thermally conductive silicone grease is used to conduct heat of the substrate 12 .

[0042] A fan 131 is also installed on the back of the heat sink 13. The fan 131 is fixed on the back of the heat sink 13, and can make the heat sink 13 dissipate heat better.

[0043] The present invention can realize the movement of the center points of LED chips of different bands through a moving platform, so as to achieve the effect of coinciding with the optical axis of the optical element; compared with the method of optically combining LED chips of different bands, the present invention has great improvements in installation and cost, which can not only bring higher light power to fluorescent microscopy illumination, but also greatly reduce the cost of the lighting device; therefore, the present invention has good market application prospects.

[0044] The above embodiments are only used to illustrate the technical solution of the present invention but not to limit it. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, and all should be included in the scope of the claims of the present invention.

Claims

1. An LED multi-spectrum common light path light source lighting device, characterized in that: It comprises a multi-band LED light source (10), a moving platform (20) and an optical element (30). The multi-band LED light source (10) is fixedly mounted on the mobile platform (20). The moving platform (20) and the optical element (30) are both mounted on a base (40). The light-emitting surface of the multi-band LED light source (10) is arranged opposite to the optical element (30); The moving platform (20) comprises a horizontal moving component (21) and a vertical moving component (22). The horizontal moving assembly (21) is fixedly mounted on the base (40). The vertical moving component (22) is fixedly connected to the multi-band LED light source (10). The horizontal moving assembly (21) and the vertical moving assembly (22) are fixedly connected via a supporting plate (23); The horizontal moving assembly (21) comprises a first guide rod (211), a first guide block (212), a first adjusting screw rod (213), a first nut (214) and a first motor (215), wherein the first motor (215) is used to drive the first adjusting screw rod (213) to rotate, thereby generating a horizontal translation force on the support plate (23) through the first nut (214). Both ends of the first guide rod (211) are fixedly mounted on the base (40) via first support seats (216); A first guide block (212) matched with the first guide rod (211) is fixedly mounted on the support plate (23); One end of the first adjusting screw (213) is fixedly connected to the first motor (215), and the other end is threadedly connected to the first nut (214); The first nut (214) is fixedly mounted on the support plate (23) via a first nut mounting seat; The vertical moving assembly (22) comprises a second guide rod (221), a second guide block (222), a second adjusting screw (223), a second nut (224), a second motor (225), and a second support seat (226) fixedly mounted on the support plate (23); the second guide rod (221) is vertically mounted on the second support seat (226); the second motor (225) drives the second adjusting screw (223) to rotate, thereby generating a vertical translation force on the heat sink (13) through the second nut (224); A second guide block (222) matched with the second guide rod (221) is fixedly mounted on one side of the multi-band LED light source (10). One end of the second adjusting screw (223) is threadedly passed through the support plate (23) and is fixedly connected to the second motor (225), and the other end is threadedly connected to the second nut (224); The second nut (224) is fixedly mounted on the other side of the multi-band LED light source (10) via a second nut mounting seat; A focusing mechanism (50) is also provided on the light-emitting side of the optical element (30); The multi-band LED light source (10) comprises LED chips (11) of multiple bands, a substrate (12), a heat sink (13) and a connector (14). The LED chips (11) are packaged on the substrate (12), wherein the LED chips (11) are distributed in a rectangular shape and are arranged at intervals; The substrate (12) fixedly mounted on the heat sink (13) is also provided with a plurality of connectors (14); The optical element (30) comprises at least a square lens (31) and a collimating lens group (32), wherein the square lens (31) is arranged on the light incident side of the collimating lens group (32); A fan (131) is also installed on the back of the heat sink (13); The moving platform (20) is also provided with a fine adjustment mechanism along the axial direction of the optical axis, and the fine adjustment mechanism is used to adjust the distance between the LED chip (11) and the square lens (31); The base (40) is also provided with a first optical coupler switch, and the support plate (23) is also provided with a first baffle plate used in conjunction with the first optical coupler switch, and the first optical coupler switch and the first baffle plate cooperate with each other to serve as a first limit mechanism; A second optical coupler switch is also provided on the support plate (23), and a second baffle plate used in conjunction with the second optical coupler switch is provided on the heat sink (13) of the multi-band LED light source (10), and the second optical coupler switch and the second baffle plate cooperate with each other to serve as a second limiting mechanism.

2. The LED multi-spectrum common light path light source lighting device according to claim 1, characterized in that: The optical element (30) further comprises: a support (33) fixedly mounted on the base (40), and the collimating lens group (32) is mounted on the support (33).

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