CN112797373B - Light guide assembly and optical system - Google Patents
Light guide assembly and optical system Download PDFInfo
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- CN112797373B CN112797373B CN201911109139.9A CN201911109139A CN112797373B CN 112797373 B CN112797373 B CN 112797373B CN 201911109139 A CN201911109139 A CN 201911109139A CN 112797373 B CN112797373 B CN 112797373B
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- light guide
- guide rod
- light
- rotating
- assembly
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
Abstract
The invention provides a light guide assembly, which comprises a light guide rod, a rotating part sleeved outside the light guide rod and fixedly connected with the light guide rod, and a driving assembly for driving the rotating part to rotate, wherein the light guide rod is used for homogenizing light, the rotating part drives the light guide rod to rotate around an axis parallel to the long axis direction of the light guide rod when rotating, and light led out by the light guide rod when rotating forms a circular light spot. The invention also provides an optical system which comprises a light source and the light guide assembly, wherein the light guide assembly receives light emitted by the light source. According to the light guide assembly and the optical system, the rotating part drives the light guide rod to rotate, so that the non-circular light spots are converted into circular light spots with larger area and better light homogenizing effect, and the application requirement is met.
Description
Technical Field
The present invention relates to the field of optics, and in particular, to a light guide assembly and an optical system.
Background
In the field of illumination, it is generally required that the illumination spot emitted from the light source is a uniform circular spot. The conventional light homogenizing element comprises a square light guide rod and a round light guide rod, wherein the cross section of the square light guide rod perpendicular to the central line of the light guide rod is square, and the cross section of the round light guide rod perpendicular to the central line of the light guide rod is round, wherein the light homogenizing effect of the square light guide rod is superior to that of the round light guide rod, and the square light guide rod is generally adopted in the conventional optical system to perform light homogenizing so as to obtain uniform illumination light spots.
In order to obtain the round light spot, one mode is to adopt a square-round integrated light guide rod or a combination of the square light guide rod and the round light guide rod, and the main problem is that the light spot has patterns with alternate brightness; another way is to provide a circular pattern piece on the outgoing light path of the light source, which has the main problem of low light utilization rate.
Disclosure of Invention
The invention provides a light guide assembly and an optical system, which can convert non-circular light spots into circular light spots with larger area and better light homogenizing effect, thereby meeting application requirements.
The embodiment of the invention realizes the aim through the following technical scheme.
In a first aspect, an embodiment of the present invention provides a light guide assembly, including a light guide rod, a rotating portion sleeved outside the light guide rod and fixedly connected to the light guide rod, and a driving assembly for driving the rotating portion to rotate, where the light guide rod is used for homogenizing light, and when the rotating portion rotates, the light guide rod is driven to rotate around an axis parallel to a long axis direction of the light guide rod, and light led out by the light guide rod forms a circular light spot when the light guide rod rotates.
In some embodiments, the light guide assembly further comprises a bearing, the bearing being sleeved on the outside of the rotating portion and being rotatably connected to the rotating portion, the bearing remaining stationary as the rotating portion rotates.
In some embodiments, the rotating part comprises a rotating shell and a transmission device, the rotating shell comprises a shell and a fixing piece arranged on the surface of the shell, the shell forms an accommodating space, the light guide rod is accommodated in the accommodating space, the fixing piece is fixedly connected to the shell and the light guide rod, and the transmission device is sleeved on the outer surface of the rotating shell.
In some embodiments, the transmission includes a gear or pulley and the drive assembly drives the transmission in rotation via a gear mesh or belt.
In some embodiments, the fixing member includes a spring, and the spring is pressed against the light guide rod.
In some embodiments, at least one hook is disposed on the outer surface of the rotary shell, and an opening corresponding to the hook is disposed on the elastic sheet along a direction perpendicular to the central axis of the light guide rod, and the hook passes through the opening to fasten the elastic sheet.
In some embodiments, the central axis of the light guide bar coincides with the central axis of the rotating portion.
In some embodiments, the central axis of the light guide bar is parallel to and non-coincident with the central axis of the rotating portion.
In a second aspect, an embodiment of the present invention further provides a light guide assembly, including a light guide rod, a rotating portion sleeved outside the light guide rod and fixedly connected with the light guide rod, and a driving assembly driving the rotating portion to rotate, where the rotating portion includes an end located in a long axis direction, the driving assembly is disposed at the end, and when the rotating portion rotates, the light guide rod is driven to rotate around an axis parallel to the long axis direction of the light guide rod, and light led out by the light guide rod forms a circular light spot when the light guide rod rotates.
In some embodiments, the end portion includes a bottom wall including an inner surface and an outer surface facing away from each other, and the drive assembly is abutted to the outer surface and fixedly connected to the rotating portion.
In some embodiments, the light guide assembly further includes a fluorescent device disposed on the inner surface, and the light guide rod abuts against the fluorescent device.
In some embodiments, the light guide assembly further includes a reflecting device disposed on the inner surface, and the light guide rod abuts against the reflecting device.
In some embodiments, the rotating portion includes a heat dissipating structure, the heat dissipating structure being located on an outer surface, the heat dissipating structure being a plurality of fan-like fins or turbulators.
In a second aspect, an embodiment of the present invention further provides an optical system, including a light source and the above light guide assembly, where the light guide assembly collects light emitted by the light source.
According to the light guide assembly and the optical system, the light guide rod is driven to rotate through the rotating part, light is reflected in the light guide rod for multiple times, a virtual light source image is formed by each reflection, a two-dimensional virtual light source matrix is formed by multiple reflections, and therefore non-circular light spots are converted into circular light spots which are larger in area and better in light homogenizing effect, and application requirements are met.
These and other aspects of the invention will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a light guide assembly according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a light guide rod of a light guide assembly according to an embodiment of the present invention.
Fig. 3 is a schematic view of a light guide rod of a light guide assembly according to another embodiment of the present invention.
Fig. 4 is a schematic diagram of a circular light spot emitted by a light guide assembly according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of brightness of a circular light spot emitted by a light guide assembly according to an embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a light guide assembly according to an embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of a light guide assembly according to another embodiment of the present invention.
Fig. 8 is a schematic diagram illustrating eccentric rotation of a light guide assembly according to an embodiment of the present invention.
Fig. 9 is a schematic view illustrating a light guiding assembly rotated by a conveyor belt according to another embodiment of the present invention.
Fig. 10 is a schematic structural view of an optical system according to an embodiment of the present invention.
Fig. 11 is a schematic structural diagram of a light guide assembly according to another embodiment of the present invention.
Fig. 12 is a schematic structural diagram of a light guide assembly according to still another embodiment of the present invention.
Fig. 13 is a schematic diagram of a heat dissipation structure of an optical system according to an embodiment of the present invention.
Fig. 14 is a schematic view of another heat dissipation structure of an optical system according to an embodiment of the present invention.
Fig. 15 is a schematic structural view of an optical system according to still another embodiment of the present invention.
Fig. 16 is a schematic structural view of an optical system according to another embodiment of the present invention.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present invention with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a light guide assembly 100, where the light guide assembly 100 includes a light guide rod 10, a rotating portion 20 and a driving assembly 30, the rotating portion 20 is sleeved outside the light guide rod 10 and is fixedly connected with the light guide rod 10, the driving assembly 30 drives the rotating portion 20 to rotate, the light guide rod 10 is used for homogenizing light, the rotating portion 20 drives the light guide rod 10 to rotate around an axis X parallel to the long axis direction of the light guide rod 10 when rotating, and the light led out by the light guide rod 10 forms a circular light spot when rotating.
With continued reference to fig. 1, in the present embodiment, the axis X of the light guide rod 10 in the long axis direction coincides with the rotation axis of the rotating portion 20, that is, the light guide rod 10 is disposed along the rotation axis of the rotating portion 20. In other embodiments of the present invention, the axis X of the light guide rod 10 in the long axis direction is parallel to and does not coincide with the rotation axis of the rotating portion 20, i.e., the light guide rod 10 is eccentrically disposed inside the rotating portion 20. When the light guide rod 10 is eccentrically disposed in the rotating portion 20, the rotating portion 20 drives the light guide rod 10 to rotate, so that the size and brightness distribution of the circular light spots can be changed, and light spots with required size and brightness distribution can be obtained.
Referring to fig. 2, in the present embodiment, the light guide rod 10 is of a solid structure, and the light guide rod 10 has a quadrilateral cross section along the axis X along two ends of the axis X, namely, the first end face 11 and the second end face 12. In some embodiments of the present invention, the cross section of the light guide rod 10 along the direction perpendicular to the axis X may be various polygons such as triangle, pentagon, hexagon, octagon, and the like. According to the measurement and calculation of a plurality of experiments, the light guide rod 10 with the polygonal cross section has better light homogenizing effect and less light loss compared with the light guide rod with the circular cross section. In some other embodiments of the present invention, the light guide rod 10 may also be a hollow structure.
In some embodiments of the present invention, the light guide rod 10 is of a centrally symmetrical structure, and the light guide rod 10 is identical at a section perpendicular to the axis direction X. Referring to fig. 3, in other embodiments of the present invention, the cross section of the light guide rod 10a perpendicular to the axis direction Y may also be changed in equal proportion, for example, the area of the first end face 11a is larger than the area of the second end face 12a along the axis direction Y, and the cross section parallel to each other between the first end face 11a and the second end face 12a becomes uniformly smaller along the direction from the first end face 11a to the second end face 12 a. In some embodiments of the invention, the cross-sectional area may also be non-uniformly larger along the direction from the first end face 11a to the second end face 12a, or the cross-sectional area at the second end 12a may be larger than the cross-sectional area at the first end face 11 a.
The light homogenizing principle of the light guide bar 10 is as follows: the light is reflected at the light guide bar 10 for many times, each time the reflection can form a virtual light source image, the virtual light source image is reflected for many times to form a two-dimensional virtual light source matrix, so that the light is more uniform, the light led out by the light guide bar 10 with a non-circular cross section can form a corresponding non-circular light spot when the light guide bar 10 is not rotated, and the non-circular light spot can be converted into a circular light spot with larger area and better light homogenizing effect when the light guide bar 10 rotates, thereby meeting application requirements.
For example, in the present embodiment, when the light guide rod 10 has a quadrangular cross section and a side length of 2a, referring to fig. 4, as the light guide rod 10 rotates, numerous light spots are formed on the light exit surface of the light guide rod 10, and the numerous light spots overlap to form a final illumination light spot.
Under normal conditions, the speed of the human eye recognizing the consecutive image is 24 frames/second, that is, 1000 ms/24 frames, about 40ms (milliseconds), and the human eye does not feel a stuck feeling when viewing the consecutive image reaching or exceeding the speed, so that when the rotation speed of the light guide rod 10 is higher than 24rpm, the human eye can form a continuous circular illumination spot when viewing.
The numerous square light spots overlap to form a circular light spot, the diameter of the circular light spot is the diameter of the circumscribed circle of the quadrangular light spot, namely, 2 v 2a, and compared with the situation that the light guide rod with the circular cross section can only form the circular light spot with the same size, the light guide rod 10 with the quadrangular cross section in the embodiment enlarges the original quadrangular light spot area into the quadrangular circumscribed circle light spot area, and further has better illumination and projection effects.
As for the brightness of the formed circular spots, referring to fig. 4 and 5, assuming that the original quadrangular spot brightness is uniform, the brightness ratio gradually decreases to 0 in the circular ring with diameters of 2a to 2 v 2a due to the smaller number of overlapping times of the quadrangular spots at the overlapping position of a plurality of quadrangular spots in the region with diameters of 2a (between a to the left of 0 point on the horizontal axis) which is the same as the quadrangular spot brightness.
Referring to fig. 6, in some embodiments of the present invention, the rotating portion 20 may further include bearings 27, where the bearings 27 are sleeved on the outside of the rotating portion 20 and are rotatably connected to the rotating portion 20, and when the rotating portion 20 rotates, the bearings 27 remain stationary, specifically, the bearings 27 are in a ring-shaped structure, in this embodiment, the number of the bearings 27 is two, and the two bearings 27 are respectively disposed at two ends of the rotating portion 20.
In some embodiments of the present invention, the light guide assembly 100 may further include a stationary housing 28, the stationary housing 28 includes an annular clamping groove 281, and the bearing 27 is embedded in the annular clamping groove 281. During rotation of the rotating part 20, the bearing 27 slides in the annular clamping groove 281 relative to the stationary housing 28.
Referring to fig. 7, in another embodiment of the present invention, the bearing 27 has an inner surface 271 and an outer surface 272, the bearing 27 is sleeved on both ends of the rotating portion 20 through the inner surface 271 thereof, and is fixed to the stationary housing 28 through the outer surface 272 thereof in the form of screws 273. During rotation of the rotating part 20, the rotating part 20 slides relatively to the bearing 27, and the bearing 27 and the stationary housing 28 remain relatively stationary.
The arrangement of the bearing 27 and the static shell 28 can play a role in fixing and protecting the light guide assembly 100, prevent other objects in the environment from influencing the light guide assembly 100 rotating at a high speed, and improve the stability and the safety coefficient of the system.
Referring to fig. 1, the rotating portion 20 includes a rotating housing 21 and a transmission device 23, and the transmission device 23 is sleeved on an outer surface of the rotating housing 21. Specifically, in the present embodiment, the rotary housing 21 has a hollow cylindrical structure, the rotary housing 21 includes a housing 211 and a fixing member 212 disposed on a surface of the housing 211, the housing 211 forms an accommodating space 213, the light guide rod 10 is accommodated in the accommodating space 213, and the fixing member 212 is fixedly connected to the housing 211 and the light guide rod 10. The receiving space 213 is configured to match the shape of the light guide rod 10 to stably place the light guide rod 10. The light guide rod 10 is accommodated in the accommodating space 211, so that the light guide rod 10 can be driven to rotate by the rotary shell 21, and the light guide rod 10 can be better fixed.
Specifically, the hollow cylindrical structure of the rotary shell 21 has complete circumferential surfaces at both ends, the circumferential surface of the middle section is hollowed out, the circumferential surfaces at both ends are connected by a plurality of columns, and the hollow part forms an accommodating space 213.
Referring to fig. 1 and 8, in the present embodiment, the transmission device 23 is a transmission gear, a saw-tooth structure is disposed on the periphery of the transmission device 23, and the transmission device 23 rotates in a gear transmission manner. Specifically, the transmission device 23 is driven to rotate by the driving assembly 30 as a driven gear, the driving assembly 30 comprises a driving wheel 31, and the driving wheel 31 is in meshed connection with the transmission device 23. In the present embodiment, the axis X of the light guide rod 10 in the longitudinal direction coincides with the rotation axis of the rotating portion 20, the number of transmission gears is two, and the transmission gears are respectively fitted on the circumferential surfaces of the two ends of the rotating case 21, and in other embodiments of the present invention, the number of transmission gears may be 1.
Referring to fig. 9, in some embodiments of the present invention, the transmission 23a is a pulley, and the transmission 23a rotates in a belt-driven manner. Specifically, the outer peripheral surface of the transmission device 23a is provided with a transmission belt groove, the driving assembly 30a comprises a turntable, the turntable is connected with the transmission device 23a through a transmission belt 281, and the turntable is used as a driving wheel to drive the transmission device 23a to rotate through the transmission belt 281.
Referring to fig. 1 again, the fixing member 212 includes a spring 2121, and the spring 2121 is pressed against the light guide rod 10. Specifically, at least one hook 215 is disposed on the outer surface of the rotary housing 21, and an opening 2122 corresponding to the hook 215 is disposed on the elastic sheet 2121 along an axis perpendicular to the long axis direction of the light guide rod 10, and the hook 215 passes through the opening 2122 to fasten the elastic sheet 2121. The elastic sheet 2121 is provided around the outer periphery of the light guide rod 10. The elastic sheet 2121 can firmly combine the light guide rod 10 with the rotary shell 21, so as to prevent the light guide assembly 100 from being separated from the rotary shell 21 in the high-speed rotation process, and improve the overall stability of the light guide assembly 100.
Other structures, such as glue strips or elastic contractions, may be used for securing the light guide bar 10 to the rotating portion 20 by the securing member 212 in other embodiments of the present invention.
Referring to fig. 10, an optical system 200 is further provided in the embodiment of the invention, and the optical system 200 is a transmission optical system. The optical system 200 includes a light source 40 and a light guide assembly 100, wherein the light guide assembly 100 receives the light emitted from the light source 40, homogenizes the light, and guides out a circular light spot when rotating.
In some embodiments of the present invention, the optical system 200 further includes a converging lens 50, the converging lens 50 being located on the optical path between the light source 40 and the light guide assembly 100, the converging lens 50 being configured to collect and converge the light emitted by the light source 40.
In this embodiment, in order to better explain the light spot formed by the optical system 200, a receiving screen 90 is further provided in fig. 9, and the light emitted from the light source 40 forms a circular light spot on the receiving screen 90. It is well known that the presence or absence of the receiving screen 90 does not affect the light-emitting effect of the optical system 100, and that the receiving screen 90 may not be provided in other embodiments of the present invention.
The light emitted by the light source 40 is converged on the light incident surface of the light guide assembly 100 through the converging lens 50, the light guide assembly 100 rotates under the driving of an external motor, innumerable square light spots are formed on the light emergent surface of the light guide assembly 100, and the innumerable square light spots are overlapped to form a circular light spot. The transmission type optical system 200 has a simple structure, can form round light spots with good light homogenizing effect, and has wide application range.
Referring to fig. 11, the embodiment of the invention further provides a light guide assembly 300, wherein the light guide assembly 300 includes a light guide rod 10a, a rotating portion 320 sleeved outside the light guide rod 10a and fixedly connected with the light guide rod 10a, and a driving assembly 330 driving the rotating portion 320 to rotate, the light guide rod 10a is used for homogenizing light, the rotating portion 320 includes an end 321 located in a long axis direction, the driving assembly 330 is disposed at the end 321, and the rotating portion 320 drives the light guide rod 10a to rotate around an axis Y parallel to the long axis direction of the light guide rod 10a when rotating, the light guided by the light guide rod 10a forms a circular light spot.
In this embodiment, the driving assembly 330 includes a motor 3301 and a driving shaft 3302, where the driving shaft 3302 and the motor 3301 are in an integral rotation structure, that is, the motor 3301 and the driving shaft 3302 are fixedly connected and can move together, so that the problem that concentricity cannot be guaranteed between the meshing precision and a plurality of rotating parts in other combination modes such as a meshing mode can be effectively avoided, the integration of the rotating part 320 is higher, no redundant rotating parts exist, the symmetry of the rotating part 320 is better, and a serious rotation balance problem cannot occur.
The rotating portion 320 includes a rotating shell 321, in this embodiment, the rotating shell 321 is a hollow cylinder structure, the end 321 includes a bottom wall 322, the bottom wall 322 includes an inner surface 3221 and an outer surface 3222 that are opposite to each other, and the driving assembly 330 is abutted to the outer surface 3222 and fixedly connected to the rotating portion 320.
In this embodiment, the light guide assembly 300 further includes a fluorescent device 340, the fluorescent device 340 is disposed on the inner surface 3221, and the light guide rod 10a abuts against the fluorescent device 340.
The fluorescent device 340 is a film-shaped structure made of fluorescent material, and emits fluorescence under the excitation of light beams, in some embodiments, because the fluorescent device 340 generates heat during the light conversion process, if heat cannot be timely dissipated, the working temperature of the fluorescent device 340 gradually rises, after exceeding a certain temperature, the fluorescence conversion efficiency is rapidly reduced, the vicious circle is caused by the rise of heat power consumption, and finally, the failure occurs at the extreme working temperature. In this embodiment, the fluorescent device 340 is further a fluorescent film with a scattering function, so that a part of the light beam can be radiated, and the accumulation of heat is reduced.
Specifically, the fluorescent device 340 may be formed by mixing fluorescent powder and a carrier thereof, the carrier may be glue, glass, etc., the fluorescent powder may be yellow fluorescent powder, green fluorescent powder, red fluorescent powder, or a mixture of several fluorescent powder, etc., in a specific embodiment, the fluorescent powder is excited to perform wavelength conversion on the light emitted by the light source to form illumination light, and a reflective layer is disposed between the fluorescent device 340 and the inner surface 3221, where the reflective layer is a metal reflective layer or a non-metal reflective layer.
In some embodiments of the present invention, the fluorescent device 340 may be at least one material or a composite material formed of two or more materials such as silver, aluminum, gold, chromium, nickel, copper, platinum, rhodium, silver/aluminum, gold/silver, gold/aluminum, gold/silver/aluminum, or a non-metal reflective material such as at least one material or a composite material formed of two or more materials such as silicon oxide, magnesium fluoride, zinc sulfide, tantalum oxide, cerium oxide, zirconium oxide, and aluminum oxide, or a metal-non-metal composite reflective material.
In some embodiments of the present invention, a thermally conductive paste may also be applied between the fluorescent device 340 and the inner surface 3221 to reduce the thermal contact resistance between the fluorescent device 340 and the fluorescent device 340.
Referring to fig. 12, in some embodiments of the present invention, the light guiding assembly 300 may replace the fluorescent device 340 with a reflective device 350, the reflective device 350 is disposed on the inner surface 3221, the light guiding rod 10a abuts against the reflective device 350, and the reflective device 350 is used for reflecting the received light. In another embodiment of the present invention, the light guide rod 10a may be spaced apart from the reflecting means 350.
With continued reference to fig. 11, in the light guide assembly 300, the rotating portion 320 may further include a heat dissipation structure 326, where the heat dissipation structure 326 is located on the outer surface 3222 and is configured to dissipate heat emitted by the system to cool the rotating housing. Referring to fig. 13, the heat dissipating structure 326 is a plurality of fan-like fins 3261. Referring to fig. 14, in some embodiments of the present invention, the heat dissipating structure 326a may also be a plurality of spoiler columns 3262. The spoiler column 3262 and the fan-like structure fin 3261 may be mixedly disposed on the outer surface 3222. The heat dissipating structures 326 and 326a are used to enhance the turbulence of the fluid nearby during rotation, and increase the convective heat transfer coefficient, thereby achieving the purpose of enhancing heat transfer without adding additional heat dissipating elements.
Referring to fig. 15, an optical system 400 is further provided in the embodiment of the present invention, and the optical system 400 is a reflective optical system. The optical system 400 includes a light source 440 and a light guide assembly 500, the light guide assembly 500 includes a fluorescent device 470, the fluorescent device 470 is spaced apart from the light guide rod 510 by a certain distance, and the light guide assembly 500 receives light emitted from the light source 440. The optical system 400 further includes a light splitting and combining element 460, where the light splitting and combining element 460 is located on the optical path between the light source 440 and the light guiding assembly 500.
In this embodiment, the light splitting and combining element 460 is a dichroic plate, the light splitting and combining element 460 includes a first face 461 and a second face 462 opposite to each other, the first face 461 is disposed near the light source 440, and the second face 462 is disposed near the light guiding assembly 500. The light splitting and combining element 460 is a dichroic plate, and light incident on the first surface 461 is transmitted through the first surface 461, and light incident on the second surface 462 is reflected on the second surface 462, thereby performing a light splitting function. In some embodiments of the present invention, the light splitting and combining element 460 may be one of a region plating film or a region light combining film.
In this embodiment, the optical system 400 further includes a converging lens 450, and the converging lens 450 is used to collect and converge the light emitted from the light source 440. The fluorescent device 470 may remain stationary or rotate with the light guide assembly 300.
Referring to fig. 16, an optical system 600 is further provided in the embodiment of the present invention, and the optical system 600 is a reflective optical system. The optical system 600 includes a light source 640 and a light guide assembly 300, and the light guide assembly 300 receives light emitted from the light source 640. The optical system 600 further includes a light splitting and combining element 660, where the light splitting and combining element 660 is located on the optical path between the light source 640 and the light guiding assembly 300.
In summary, the embodiment of the invention provides that the optical system 200 adopts the light guide assembly 100, the optical system 400 adopts the light guide assembly 500, and the optical system 600 adopts the light guide assembly 300 to obtain the circular light spot with uniform brightness, and the light path is simple and the application range is wide.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (12)
1. The light guide assembly is characterized by comprising a light guide rod, a rotating part sleeved outside the light guide rod and fixedly connected with the light guide rod, and a driving assembly for driving the rotating part to rotate, wherein the light guide rod is used for homogenizing light, the rotating part drives the light guide rod to rotate around an axis parallel to the long axis direction of the light guide rod when rotating, and light led out by the light guide rod when rotating forms a circular light spot;
the rotating part comprises a rotating shell, the rotating shell comprises a shell and a fixing piece arranged on the surface of the shell, the shell forms an accommodating space, the light guide rod is accommodated in the accommodating space, and the fixing piece is fixedly connected with the shell and the light guide rod; the fixing piece comprises an elastic piece, the elastic piece is pressed and attached to the light guide rod, the elastic piece is arranged around the periphery of the light guide rod, at least one hook is arranged on the outer surface of the rotary shell, an opening corresponding to the hook is arranged on the elastic piece along the axis perpendicular to the long axis direction of the light guide rod, and the hook penetrates through the opening to be fastened and fixed with the elastic piece.
2. The light guide assembly of claim 1, further comprising a bearing that is sleeved outside of the rotating portion and rotatably coupled thereto, the bearing remaining stationary as the rotating portion rotates.
3. The light guide assembly of claim 1, wherein the rotating portion comprises a transmission device that is sleeved on an outer surface of the rotating housing.
4. A light guide assembly as claimed in claim 3, wherein the transmission comprises a gear or pulley, and the drive assembly drives the transmission in rotation via a gear mesh or belt.
5. The light guide assembly of claim 1, wherein the axis of the light guide rod in the long axis direction coincides with the axis of rotation of the rotating portion.
6. The light guide assembly of claim 1, wherein the axis of the light guide rod in the long axis direction is parallel to and not coincident with the axis of rotation of the rotating portion.
7. The light guide assembly of claim 1, wherein the rotating portion includes an end portion in a long axis direction, and the driving assembly is disposed at the end portion.
8. The light guide assembly of claim 7, wherein the end portion includes a bottom wall including an inner surface and an outer surface facing away from each other, and wherein the drive assembly abuts the outer surface of the bottom wall and is fixedly coupled to the rotating portion.
9. The light guide assembly of claim 8, further comprising a fluorescent device disposed on the inner surface, the light guide rod abutting the fluorescent device.
10. The light guide assembly of claim 8, further comprising a reflective device disposed on the inner surface, the light guide rod abutting the reflective device.
11. The light guide assembly of claim 8, wherein the rotating portion includes a heat dissipating structure on an outer surface of the bottom wall, the heat dissipating structure being a plurality of fan-like fins or turbulators.
12. An optical system comprising a light source, an optical element, and a light guide assembly according to any one of claims 1-11, wherein the light guide assembly collects light from the light source.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911109139.9A CN112797373B (en) | 2019-11-13 | 2019-11-13 | Light guide assembly and optical system |
| PCT/CN2020/123807 WO2021093566A1 (en) | 2019-11-13 | 2020-10-27 | Light guide assembly and optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911109139.9A CN112797373B (en) | 2019-11-13 | 2019-11-13 | Light guide assembly and optical system |
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| CN112797373A CN112797373A (en) | 2021-05-14 |
| CN112797373B true CN112797373B (en) | 2023-06-20 |
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| CN201911109139.9A Active CN112797373B (en) | 2019-11-13 | 2019-11-13 | Light guide assembly and optical system |
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| CN (1) | CN112797373B (en) |
| WO (1) | WO2021093566A1 (en) |
Citations (3)
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|---|---|---|---|---|
| JPH10186145A (en) * | 1996-12-27 | 1998-07-14 | Minolta Co Ltd | Light guide holding mechanism |
| JP2010160356A (en) * | 2009-01-08 | 2010-07-22 | Olympus Corp | Illumination optical apparatus and projector |
| JP2010164855A (en) * | 2009-01-16 | 2010-07-29 | Olympus Corp | Rod integrator, and illumination system and projection apparatus each having the same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW414327U (en) * | 2000-03-17 | 2000-12-01 | Optoma Corp | Dust-free structure for integration pillar of projector |
| JP2003279710A (en) * | 2002-03-22 | 2003-10-02 | Seiko Epson Corp | Rod integrator and projector |
| JP2006091045A (en) * | 2004-09-21 | 2006-04-06 | Nidec Copal Corp | Holding mechanism for projector light tunnel |
| JP2006243433A (en) * | 2005-03-04 | 2006-09-14 | Seiko Epson Corp | Lighting system and image display device |
| US8496352B2 (en) * | 2010-02-26 | 2013-07-30 | Texas Instruments Incorporated | Wavelength conversion |
| CN103292254B (en) * | 2011-12-07 | 2015-05-27 | 深圳市绎立锐光科技开发有限公司 | Light source |
| JP5997077B2 (en) * | 2013-03-07 | 2016-09-21 | 日立マクセル株式会社 | Light source device |
| CN206682878U (en) * | 2017-02-28 | 2017-11-28 | 广州市杕光照明器材有限公司 | Stage lighting and its light guide component |
| CN207279393U (en) * | 2017-10-09 | 2018-04-27 | 广州市焦汇光电科技有限公司 | One kind realizes the rotating optical system of pattern |
-
2019
- 2019-11-13 CN CN201911109139.9A patent/CN112797373B/en active Active
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2020
- 2020-10-27 WO PCT/CN2020/123807 patent/WO2021093566A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10186145A (en) * | 1996-12-27 | 1998-07-14 | Minolta Co Ltd | Light guide holding mechanism |
| JP2010160356A (en) * | 2009-01-08 | 2010-07-22 | Olympus Corp | Illumination optical apparatus and projector |
| JP2010164855A (en) * | 2009-01-16 | 2010-07-29 | Olympus Corp | Rod integrator, and illumination system and projection apparatus each having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021093566A1 (en) | 2021-05-20 |
| CN112797373A (en) | 2021-05-14 |
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