Condensing lens device for high-power illumination light path

Abstract

The invention discloses a condenser device for a high-power illumination light path, which belongs to the technical field of high-power illumination and comprises a positioning base, a positioning box body, a water cooling plate, a box body cover plate, a heat resisting sheet, a light trap box, a light trap, a cooling fin, a first off-axis reflector, a cold light mirror assembly and a second off-axis reflector. The positioning box body is provided with two arms, is L-shaped and is fixed on the positioning base; the first off-axis reflecting mirror is fixed on one arm of the positioning box body; the water cooling plate is fixed on the back surface of the first off-axis reflector on the positioning box body; the second off-axis reflector is fixed on the other arm of the positioning box body; the radiating fins are fixed on the outer surface of the positioning box body and on the back surface of the second off-axis reflector; and the cold light mirror assembly is tightly fixed on two 90-degree surfaces in the positioning box body. The integral structure is high in integration level, good in installation and maintenance performance and capable of being used in a high-power illumination light path.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-power lighting, and in particular relates to a condenser device used in a high-power lighting light path. Background Art

[0002] In the illumination optical path, the light emitted by the light source needs to pass through a condenser device to filter out visible light and infrared light, and focus the ultraviolet light into the optical components behind the condenser device. For high-power light sources, the condenser device not only needs to meet the positioning accuracy of the optical components, but also needs to consider how to dissipate heat. Therefore, existing condenser devices are rarely used for collimating and focusing the light path in high-power illumination optical paths. High-power illumination optical paths often use lenses for collimating and focusing the light path, and the film system of the lens is generally unable to withstand the irradiation of the high-power optical path. Therefore, in order to address the above problems, it is necessary to propose a condenser device for high-power illumination optical paths to solve the problems existing in the prior art. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A condenser device for a high-power illumination light path, comprising: a positioning base, a positioning box, a water-cooling plate, a box cover, a heat insulating sheet, a light trap box, a light trap, a heat sink, a first off-axis reflector, a cold light mirror assembly, and a second off-axis reflector;

[0005] The positioning box has two arms in an L shape and is fixed on the positioning base; the first off-axis reflector is fixed on one of the arms of the positioning box and inside the positioning box; the water-cooling plate is fixed on the back of the positioning box where the first off-axis reflector is installed; the second off-axis reflector is fixed on the other arm of the positioning box and inside the positioning box; the heat sink is fixed on the outer surface of the positioning box and on the back where the second off-axis reflector is installed; the cold light mirror assembly is tightly fixed on the two sides at a 90° angle inside the positioning box to ensure that the cold light mirror reflects the light at a 90° angle; the light trap is fixed on the light trap box, which is fixed on the outer surface of the positioning box and on the back where the cold light mirror assembly is installed; the heat insulation sheet is installed between the light trap box and the positioning box to reduce the heat transferred from the light trap to the positioning box; the box cover is fixed on the upper end of the positioning box.

[0006] The present invention has the following beneficial effects:

[0007] The present invention provides a condenser device for high-power illumination optical paths. The optical components are precisely positioned and installed using a positioning box, which also prevents light leakage and provides excellent installation and maintainability. The cold light mirror is secured with a set screw and a pressure frame, which effectively controls the clamping force required to secure the cold light mirror and reduces stress concentration during clamping.

[0008] The light trap structure of this invention is highly manufacturable and space-saving. The smaller the sawtooth angle of the matte structure, the more light is reflected within it, resulting in a better matte effect. A flow channel is provided within the light trap, dissipating heat from the light trap via water cooling. The flow channel and the sawtooth matte structure are integrated, effectively reducing thermal resistance and facilitating the water cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the three-dimensional structure of the condenser device for high-power illumination light path of the present invention, wherein 1-positioning base, 2-positioning box, 3-water cooling plate, 4-light source, 5-box cover, 6-thermal insulation sheet, 7-light trap box, 8-light trap, 9-heat sink;

[0010] Figure 2 This is a schematic diagram of the layout of optical components of a condenser device for a high-power illumination light path according to the present invention, wherein: 2 - positioning box; 3 - water-cooling plate; 4 - light source; 6 - thermal insulation sheet; 7 - light trap box; 8 - light trap; 9 - heat sink; 10 - first off-axis reflector; 11 - cold light mirror assembly; 12 - second off-axis reflector;

[0011] Figure 3 This is a partially exploded schematic diagram of a condenser device for a high-power illumination optical path according to the present invention, showing: 1 - positioning base, 2 - positioning box, 3 - water-cooling plate, 4 - light source, 6 - thermal insulation sheet, 7 - light trap box, 8 - light trap, 9 - heat sink, 10 - first off-axis reflector, 11 - cold light mirror assembly, 12 - second off-axis reflector;

[0012] Figure 4 This is a partially exploded schematic diagram of a cold light mirror assembly in a condenser device for a high-power illumination optical path according to the present invention, wherein 111 is a cold light mirror base, 112 is a cold light mirror, 113 is a pressing frame, 114 is a cold light mirror frame, and 115 is a set screw.

[0013] Figure 5 Schematic diagram of the three-dimensional structure of a light trap in a condenser device for a high-power illumination optical path according to the present invention, wherein 81 is a water-cooling channel, and 82 is an extinction structure;

[0014] Figure 6 It is a schematic diagram of the layout of the water-cooling channel of the light trap in the condenser device for the high-power illumination light path of the present invention;

[0015] Figure 7 It is a schematic diagram of the light trap extinction principle in the condenser device for high-power illumination light path of the present invention;

[0016] Figure 8This is a schematic diagram of the installation and positioning of the condenser device for high-power illumination light path of the present invention, wherein A is the pin and B is the support surface. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0018] The technical solution of the present invention is described in detail below with reference to the embodiments:

[0019] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the condenser device for a high-power illumination optical path of the present invention (hereinafter referred to as the condenser device) includes: a positioning base 1, a positioning box 2, a water-cooling plate 3, a box cover 5, a thermal insulation sheet 6, a light trap box 7, a light trap 8, a heat sink 9, a first off-axis reflector 10, a cold mirror assembly 11, and a second off-axis reflector 12. The cold mirror assembly 11 includes a cold mirror base 111, a cold mirror 112, a pressing frame 113, a cold mirror frame 114, and a set screw 115.

[0020] The positioning box 2 has two L-shaped arms and is fixed to the positioning base 1. A first off-axis reflector 10 is fixed to one of the arms of the positioning box 2 and is located within the positioning box 2. A water-cooled plate 3 is fixed to the back of the positioning box 2 where the first off-axis reflector 10 is mounted. A second off-axis reflector 12 is fixed to the other arm of the positioning box 2 and is located within the positioning box 2. A heat sink 9 is fixed to the outer surface of the positioning box 2 and is located behind the second off-axis reflector 12. A cold mirror assembly 11 is fixed closely to two surfaces of the positioning box 2 at a 90° angle, ensuring that the cold mirror 112 reflects light at a 90° angle. A light trap 8 is fixed to a light trap box 7, which is fixed to the outer surface of the positioning box 2 and is located behind the cold mirror assembly 11. A heat shield 6 is installed between the light trap box 7 and the positioning box 2 to reduce the amount of heat transferred from the light trap 8 to the positioning box 2. A box cover 5 is fixed to the upper end of the positioning box 2.

[0021] like Figure 4 As shown, the pressing frame 113 described in this embodiment is arranged in the cold light mirror frame 114, the cold light mirror 112 is limited by the cold light mirror frame 114, the cold light mirror frame 114 is fixed to the cold light mirror base 111, and the set screw 115 presses against the pressing frame 113, so that the cold light mirror 112 is pressed and fits tightly against the positioning surface of the cold light mirror base 111.

[0022] like Figure 5 As shown, the extinction structure 82 of the light trap 8 described in this embodiment is sawtooth-shaped, and the light trap 8 is provided with a water-cooling channel 81 .

[0023] The surface of the sawtooth matte structure 82 of the light trap 8 described in this embodiment is sandblasted and then plated with black nickel. The inner wall of the light trap box 7 is plated with black nickel, which is conducive to absorbing light entering the sawtooth matte structure 82.

[0024] The positioning box 2 described in this embodiment is made of a whole piece of material, such as aluminum alloy 6061, which can ensure the installation and positioning accuracy of the optical element.

[0025] The working principle of this embodiment is as follows:

[0026] like Figure 2 、 Figure 4 As shown, the first off-axis reflector 10 collimates the light emitted by the light source 4. The cold mirror 112 reflects only blue and ultraviolet light, filtering most of the visible and infrared light into the light trap 8. Most of the visible and infrared light is collected and absorbed by the light trap 8, while the ultraviolet light is reflected 90° by the cold mirror 112 onto the second off-axis reflector 12. The second off-axis reflector 12 focuses the light reflected by the cold mirror 112, directing it into the subsequent optical components (the condenser assembly is only part of the illumination optical path; other components, such as the light rod module, may follow the condenser assembly). This embodiment is used in a high-power illumination optical path. For example, if the output power of the light source 4 is 300W, the reflectivity of the first and second off-axis reflectors 10 and 12 after coating is approximately 93%. After the cold mirror 112 filters the light emitted by the light source 4, approximately 90% of the light is collected and absorbed by the light trap 8. Therefore, the majority of the heat in this embodiment is concentrated in the light trap 8. like Figure 7 As shown, the extinction structure 82 of the light trap 8 is sawtooth-shaped, which is easy to manufacture and can be obtained by wire cutting, and is relatively space-saving. The smaller the sawtooth angle, the more times the light is reflected in it, and the better the extinction effect. Figure 5 、 Figure 6 As shown, light trap 8 is provided with a water-cooling channel 81, which dissipates heat from light trap 8 through water cooling. Light trap 8 is machined from a single integral part, and the water-cooling channel 81 and the serrated matte structure 82 of light trap 8 are integrated, effectively reducing thermal resistance and facilitating the water-cooling heat dissipation effect. The first off-axis reflector 10 itself is subject to approximately 7% of the light emitted by light source 4, while the second off-axis reflector 12 itself is subject to a smaller optical power. Therefore, a water-cooling plate 3 is provided to dissipate heat for the first off-axis reflector 10, while a heat sink 9 is provided to dissipate heat for the second off-axis reflector 12. Thermal grease can be applied between the surfaces of the water-cooling plate 3 and the heat sink 9 mating with the positioning box 2 to reduce thermal resistance and enhance heat dissipation.

[0027] like Figure 8 As shown, the optical elements in the condenser device are encapsulated in the positioning box 2, which can prevent light leakage. The first off-axis reflector 10 and the second off-axis reflector 12 are positioned by the pin A and the positioning box 2, and the positioning box 2 and the positioning base 1 are positioned by the support surface B. After the condenser device is adjusted to a good position, the positioning base 1 is fixed to the lighting system. During maintenance and disassembly, the components except the positioning base 1 can be taken out separately for maintenance.

[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied to other related system fields, are also included in the scope of protection of the present invention.

[0029] The contents not described in detail in the specification of the present invention belong to the prior art known to those skilled in the art.

Claims

1. A condenser device for a high-power illumination light path, characterized in that: include: Positioning base, positioning box, water cooling plate, box cover, thermal insulation sheet, light trap box, light trap, heat sink, first off-axis reflector, cold light mirror assembly, second off-axis reflector; The positioning box has two arms in an L shape and is fixed on the positioning base; the first off-axis reflector is fixed on one of the arms of the positioning box and inside the positioning box; the water-cooling plate is fixed on the back of the positioning box where the first off-axis reflector is installed; the second off-axis reflector is fixed on the other arm of the positioning box and inside the positioning box; the heat sink is fixed on the outer surface of the positioning box and on the back where the second off-axis reflector is installed; the cold light mirror assembly is tightly fixed on the two sides at a 90° angle inside the positioning box to ensure that the cold light mirror reflects the light at a 90° angle; the light trap is fixed on the light trap box, which is fixed on the outer surface of the positioning box and on the back where the cold light mirror assembly is installed; the heat insulation sheet is installed between the light trap box and the positioning box to reduce the heat transferred from the light trap to the positioning box; the box cover is fixed on the upper end of the positioning box.

2. The condenser lens device for high-power illumination light path according to claim 1, characterized in that: The cold light mirror assembly includes a cold light mirror base, a cold light mirror, a pressing frame, a cold light mirror frame, and a set screw; the pressing frame is arranged in the cold light mirror frame, the cold light mirror is limited by the cold light mirror frame, the cold light mirror frame is fixed on the cold light mirror base, and the set screw presses the pressing frame so that the cold light mirror is pressed tightly against the positioning surface of the cold light mirror base.

3. The condenser lens device for high-power illumination light path according to claim 1, characterized in that: The extinction structure of the light trap is sawtooth-shaped.

4. The condenser lens device for high-power illumination light path according to claim 3, characterized in that: The surface of the sawtooth matte structure of the light trap is sandblasted and then plated with black nickel, and the inner wall of the light trap box is plated with black nickel.

5. The condenser lens device for high-power illumination light path according to claim 1, characterized in that: The positioning box is processed from a whole piece of material.

6. The condenser lens device for a high-power illumination optical path according to claim 1, characterized in that: The first off-axis reflector collimates the outgoing light from the light source; the cold mirror reflects only blue light and ultraviolet light, filtering most of the visible light and infrared light into the light trap; Most of the visible light and infrared light are collected and absorbed by the light trap, while the ultraviolet light is reflected by the cold mirror at a 90° angle to the second off-axis reflector. The second off-axis reflector focuses the light reflected from the cold mirror.

7. The condenser lens device for a high-power illumination light path according to claim 1, characterized in that: Apply thermal grease between the water cooling plate, heat sink and positioning box fitting surface.

8. The condenser lens device for a high-power illumination light path according to claim 1, characterized in that: The first off-axis reflector and the second off-axis reflector are positioned by pins and a positioning box.

9. The condenser lens device for a high-power illumination optical path according to claim 1, characterized in that: A water cooling channel is provided on the light trap to dissipate heat from the light trap through water cooling.

10. The condenser lens device for high-power illumination light path according to claim 1, characterized in that: The light trap is processed from an integral part, and the water-cooling channel and the serrated matting structure of the light trap are arranged as a whole.

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