Refraction device composed of multiple lens segments

Abstract

The utility model provides a refraction device consisting of a plurality of lens segments, which is characterized in that the plurality of lens segments are combined into a refraction body, and the optical axes of the lens segments are not converged after being combined into the refraction body; incident light is transmitted by the lenses and then is emitted to the bearing surface along the optical axes, and scattered light spots are arranged on the bearing surface. According to the utility model, the plurality of lens segments are combined into the refraction body, so that light spots are dispersed under the condition that light energy is not lost. In addition, the source of the lens segments can be the lenses with flaws in partial areas but intact other parts, the abandoned lenses are reused, so that the lens is green and environment-friendly, the projection effect of a refraction body is achieved, and the purpose of solving the problem of burning caused by excessively concentrated energy on the receiving surface for receiving light spots is achieved.

Description

Technical Field

[0001] This utility model relates to the field of optics, and in particular to a refractive device composed of multiple lens segments. Background Technology

[0002] With the large-scale application of laser light sources in the projector field, the excellent directionality of their emitted light, especially the fact that multiple laser emitting units are usually manufactured in an array, results in a laser beam with a very small aperture angle and extremely high collimation. This greatly improves the efficiency of light use. Furthermore, these beams, after passing through a converging system, fall onto the receiving device, such as the projector integrating bar, and the optical elements adjacent to the integrating bar, resulting in a very small spot size and extremely concentrated laser energy.

[0003] In applications with high luminous flux, such as projectors with brightness of 100001lm or more, the demand for such equipment increases. Consequently, the light power density loaded on the integrating bar receiver and nearby devices such as diffusers in the projector's optical path also increases. This places extremely stringent requirements on the materials, coatings, and heat dissipation of optical devices.

[0004] The high optical power density can easily cause components in the optical path to burn out. Once these components burn out, the high-energy beam cannot be effectively guided out and will be absorbed nearby, thus converting into heat energy and generating extremely high temperatures. This can lead to more serious accidents.

[0005] Existing converging systems typically consist of one or more lenses. The overall effect of a converging system can be equivalent to a positive lens, where the incident light beam converges along the principal optical axis to form a nearly circular or elliptical converging spot. To ensure high receiving efficiency, the integrating rod receiver is usually placed near this focal plane. In addition to the integrating rod, other optical elements, such as diffusers, are usually placed near the front of the integrating rod; these are collectively referred to as converging light receiving devices. The converging spot on the receiving end face of the receiving device is a diffused spot centered at the intersection of the principal optical axis and the receiving end face of the device. The light power density is high in the center and decreases towards the periphery. The light power density distribution is extremely uneven within the aperture of the incident surface of the converging light receiving device, resulting in very low or even zero light power density in the peripheral region. Most of the energy is highly concentrated in the central region of the diffuser and other elements and the integrating rod. This places enormous stress on the coatings and materials of the optical elements in this region, making them prone to burn-out, which can lead to machine malfunction and potentially accidents.

[0006] Because the light power density distribution is extremely uneven in the light-transmitting aperture of the incident surface of the converging light receiver, the concentrated energy can easily cause the components in the optical path of the projection device to burn out. This makes the design and manufacturing of high-brightness projection difficult, and also leads to high costs in the manufacturing process for finding high-end materials and coatings with high damage thresholds.

[0007] The applicant previously proposed a refractive device consisting of two lens segments to disperse a light spot. However, during actual implementation, the following problems were discovered: Although the refractive device consisting of two lens segments can disperse the converging light spot into two parts, which can meet the needs of many applications, as the energy distribution of incident light varies, using only two lens segments lacks the flexibility of the method of equally dividing the incident light energy into two parts. Furthermore, as the incident light power continues to increase, even if the incident light is divided into two parts and converged separately, the energy of the resulting converged light spot is still too large. At this point, it is necessary to disperse the converged light spot into more parts. Utility Model Content

[0008] This invention provides a refraction device composed of multiple lens segments to solve the problem that the peak light power density of the receiving surface used to receive light spots is still too large. Furthermore, this invention can make full use of lenses that cannot be used completely due to local wear, saving costs and being environmentally friendly.

[0009] To achieve the above objectives, the present invention provides a refractive device composed of multiple lens segments, comprising: combining multiple lens segments into a refractive body, wherein the optical axes of each lens segment have multiple optical axes after being combined into the refractive body; incident light is transmitted through each lens segment and exits onto a receiving surface according to each optical axis, wherein the receiving surface has a diffused light spot.

[0010] As a preferred embodiment of the above technical solution, each of the lens segments is a portion separated from the same or different types of lenses / lens groups.

[0011] As a preferred embodiment of the above technical solution, each of the lens segments is a portion separated from a single lens, and / or a portion separated from a lens group composed of multiple lenses.

[0012] As a preferred embodiment of the above technical solution, preferably, the distance between each lens segment and the receiving surface varies with the focal length of each lens segment.

[0013] As a preferred embodiment of the above technical solution, preferably, when the lens segments with different focal lengths are combined, they are fixed by a fixing device.

[0014] This invention provides a refractive device composed of multiple lens segments, comprising: combining multiple lens segments into a refractive body, wherein the optical axes of each lens segment, after being combined into the refractive body, have multiple optical axes; incident light, after being transmitted through each lens, exits along each optical axis to a receiving surface, and the receiving surface has a dispersed light spot. This invention combines multiple lens segments into a refractive body, dispersing the light spot without losing light energy. Furthermore, the lens segments can be sourced from lenses with defects in some areas but intact parts, or lenses with worn sides but intact projection convex surfaces. By reusing discarded lenses, it is environmentally friendly and achieves the projection effect of a refractive body, thus solving the problem of excessive energy concentration on the receiving surface used to receive the light spot, which can lead to burns. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a refractive device composed of lens segments provided by this utility model.

[0017] Figure 2 For the Figure 1 The diagram shows the distribution of the three light spots on the converging light receiving device after separation by the refraction device.

[0018] Figure 3 For incident light Figure 1 The diagram shows the structure of the three optical axes generated after the refraction device is separated. Figure 1 .

[0019] Figure 4 For incident light Figure 1 The diagram shows the structure of the three optical axes generated after the refraction device is separated. Figure 2 .

[0020] Figure 5 This is a schematic diagram of another refractive device composed of lens segments provided in this utility model, with the misalignment method being similar to... Figure 1 different.

[0021] Figure 6 This is a schematic diagram of the refractive device consisting of three lens segments provided by this utility model.

[0022] Figure 7 For the Figure 6The diagram shows the distribution of the three light spots on the converging light receiving device after separation by the refraction device.

[0023] Figure 8 For the incident light Figure 6 The diagram shows the structure of the two optical axes generated after the refraction device is separated. Figure 1 .

[0024] Figure 9 For incident light Figure 6 The diagram shows the structure of the two optical axes generated after the refraction device is separated. Figure 2 . Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The lens structure provided by this utility model is as follows: Figure 1 and Figure 2 As shown, a refractive body is composed of several lens segments. In this refractive body, lens segments 201, 202, and 203 transmit their respective incident light to the receiving surface, resulting in several light spots (light spot 3001, light spot 3002, and light spot 3003) on the receiving surface.

[0027] Specifically, multiple lens segments originating from the same or different lens / lens groups are combined into a refractive body, with the cross-sections of each lens segment adjacent or staggered in a fixed device. After the incident light is transmitted through the refractive body, it is transmitted along the principal optical axis to the receiving surface, resulting in a diffused light spot on the receiving surface.

[0028] Each lens segment can be a part separated from different lenses (single lens) / lens groups (multiple lenses glued together); each lens segment can be one from a different lens / lens group than the remaining lens segments.

[0029] Furthermore, when lens segments of different thicknesses or focal lengths are combined to form a refractive body, the distances of each lens segment from the receiving surface within this refractive body are different. A fixing device can be used to fix each lens segment in a different position.

[0030] Furthermore, such as Figures 1 to 4 As shown, this embodiment uses a refracting body composed of three lens segments with an optical axis of 3 as an example for illustration. Specifically:

[0031] like Figure 1 , Figure 3 and Figure 4 As shown, lens segments 201, 202, and 203 form a refractive body, which is a refractive device 200.

[0032] Among them, lens segments 201, 202, and 203 can originate from the same positive lens, dividing a complete positive lens into three parts. When assembling this refractive device, these three sets of partial lenses are joined along the dividing plane, and the two side lenses are offset in opposite directions relative to the middle lens by a certain distance. For example... Figure 3 and Figure 4 As shown, in the refraction device 200, lens segments 201, 202, and 203 separate the principal optical axis transmitted by a lens in the prior art into three optical axes, namely optical axis 401 corresponding to lens segment 201, optical axis 402 corresponding to lens segment 202, and optical axis 403 corresponding to lens segment 203, as detailed below. Figure 3 As shown.

[0033] Among them, lens segment 201, lens segment 202, and lens segment 203 can be derived from different positive lenses. When these three lens segments are combined, since the focal lengths of the lens segments are different, the three lens segments can be set at different distances from the receiving device (the light-gathering receiving device 300 in the figure).

[0034] Preferably, when combining these three lens segments, the three optical axes are kept parallel and they have similar focal planes on the side of the emitted light. In the schematic diagram, this position is referred to as the converging light receiving device 300 (the aforementioned receiving surface).

[0035] When the incident light 100 is incident on the three lens segments at an angle parallel to its principal optical axis, it will be converged into three light spots by the converging light receiving device 300, such as... Figure 2 As shown, these are spot 3001, spot 3002, and spot 3003, respectively.

[0036] Optical axis 401 corresponds to lens segment 201, optical axis 402 corresponds to lens segment 202, and optical axis 403 corresponds to lens segment 203. The incident light 100 falling on the refractive device 200 is converged by the partial positive lenses 201, 202, and 203 that make up the refractive device 200, and the converging light receiving device 300 is placed near the focal plane of the three sets of partial lenses that make up the refractive device 200 on the side of the emitted light. The light rays converged by lens segment 201 fall onto the entrance surface of the converging light receiver 300, forming a light spot centered on the intersection of the main optical axis 401 and the entrance surface of the converging light receiver 300; the light rays converged by lens segment 202 fall onto the entrance surface of the converging light receiver 300, forming a light spot centered on the intersection of the main optical axis 402 and the entrance surface of the converging light receiver 300; the light rays converged by lens segment 203 fall onto the entrance surface of the converging light receiver 300, forming a light spot centered on the intersection of the main optical axis 403 and the entrance surface of the converging light receiver 300. In this way, the energy of the converged beam is distributed to three separate light spots, greatly reducing the optical power density carried by the entrance surface of the converging light receiver.

[0037] Reference illustration Figure 3 and Figure 4 As shown, 100 incident light rays falling on lens segment 201 are converged by lens segment 201 onto the converging light receiving device 300 to form a light spot 3001. The energy center of this light spot is the intersection of the principal optical axis 401 of lens segment 201 and the converging light receiving device 300. Similarly, 100 incident light rays falling on lens segment 202 are converged by lens segment 202 onto the converging light receiving device 300 to form a light spot 3002. The energy center of this light spot is the intersection of the principal optical axis 402 of lens segment 202 and the converging light receiving device 300. Likewise, 100 incident light rays falling on lens segment 203 are converged by lens segment 203 onto the converging light receiving device 300 to form a light spot 3003. The energy center of this light spot is the intersection of the principal optical axis 403 of lens segment 203 and the converging light receiving device 300. Clearly, the distance between the energy centers of light spots 3001, 3002, and 3003 corresponds to the distance between the optical axes of the three sets of partial lenses. By adjusting the relative positions of the corresponding three sets of partial lenses, the distance between their principal optical axes can be adjusted, thereby adjusting the spacing between the three light spots formed on the focal plane after the 100 incident light rays are converged by this refraction device. Specifically, when the three lens segments in the refraction device are combined, the separation of the principal optical axes is achieved by offsetting them by a certain distance in opposite directions along the dividing surfaces of the partial lenses, such as... Figure 1 and Figure 5As shown, the result is that the lens segment in the middle of the refraction device 200 converges the incident light beams 100 into a light spot in the middle of the converging light receiving device 300, while the lenses on both sides converge the incident light beams 100 into light spots on both sides.

[0038] Furthermore, the lateral relative relationship between the refractive device and the converging light receiving device can be adjusted. Specifically, the refractive device 200 can be rotated relative to the converging light receiving device 300 to... Figure 2 The light spot rotates clockwise / counterclockwise, effectively adjusting the energy distribution of the converging light on the converging light receiving device. Unlike a refraction device, which is a complete positive lens or split in two, the energy of the converging light cannot be concentrated in a small area of ​​the converging light receiving device, which can cause damage to the device or cause local burns around the central area, rendering the device unusable.

[0039] Furthermore, based on the technical solution of this utility model, two optical axes can also be projected through multiple lens segments, specifically, as shown below. Figures 6-9 As shown, it also includes lens segment 201, lens segment 202, and lens segment 203. In this embodiment, these three sets of partial positive lenses are derived from dividing a complete positive lens into three parts. When assembling this refractive device, these three sets of partial lenses are joined along the dividing surface, and the partial lenses on both sides are offset by the same distance in the same direction relative to the middle partial lens. Figure 8 As shown, what was originally a single principal optical axis has now become two separate ones: principal optical axis 401 corresponding to lens segments 201 and 203, and principal optical axis 402 corresponding to lens segment 202. This is because although the three lens segments have the same focal length, their positions are staggered. Furthermore, these two principal optical axes are separate. When combining these three sets of partial lenses, their two principal optical axes are kept parallel, and they have similar focal planes on the outgoing light side. A converging light receiving device 300 is placed at the focal plane, allowing principal optical axes 401 and 402 to converge onto it. Figure 7 The light spots 3001 and 3002 are shown. The location of the converging light receiving device 300 in this invention is not a unique position. Considering aberrations and actual manufacturing tolerances, each group of partial lenses cannot converge the collimated beam into a single point, but rather forms a light spot that diffuses outwards from the center. In specific implementations, the optimal position is selected by considering the impact of the change in light spot size on the collection efficiency of the converging light receiving device placed at this position (focal plane) when the converging light receiving device 300 is offset near this position (focal plane), as well as its impact on the maximum optical power density falling on the converging light receiving device.

[0040] Furthermore, such as Figure 6 , Figure 8As shown, when the collimated beam is incident on these three sets of partial positive lenses at an angle parallel to their principal optical axes, it will be converged into two light spots, namely light spot 3001 and light spot 3002, by these three lens segments on the converging light receiving device 300. (Refer to the schematic diagram) Figure 7 , Figure 8 As shown, the collimated light beam falling on lens segment 201 and lens segment 203 is converged by lens segment 201 and lens segment 203 onto the converging light receiving device 300, forming a light spot 3001. The energy center of this light spot is the intersection of the common principal optical axis 401 of part of lens segment 201 and lens segment 203 with the converging light receiving device 300. The collimated light beam falling on lens segment 202 is converged by lens segment 202 onto the converging light receiving device 300, forming a light spot 3002. The energy center of this light spot is the intersection of the principal optical axis 402 of part of lens segment 202 with the converging light receiving device 300. Obviously, the distance between the energy centers of light spots 3001 and 3002 corresponds to the distance between the two principal optical axes of the three sets of partial lenses. By adjusting the relative positions of lens segments 201 and 203 with lens segment 202, the distance between the two principal optical axes of the three sets of partial lenses can be adjusted, thereby adjusting the spacing between the two light spots formed on the focal plane after the incident collimated beam is converged by this refraction device. Furthermore, the lateral relative relationship between this refraction device and the converging light receiving device can be adjusted, thereby adjusting the relative position of the light spots falling on the entrance surface of the converging light receiving device. In this way, when the converging light receiving device is placed near the focal plane, the maximum power density can be greatly reduced, or even halved, compared to the case where the refraction device has only a single principal optical axis. Moreover, the energy distribution of the converging light energy on the converging light receiving device can be effectively adjusted, unlike when the refraction device has only one set of positive lenses, where the energy of the converging light can only be concentrated in a small area of ​​the converging light receiving device.

[0041] like Figure 9As shown, the light emitted from the incident ray 100 is guided and collimated to the refraction device 200. The refraction device 200 consists of three lens segments 201, 202, and 203, which are divided from the same lens. When these three sets of partial positive lenses are combined, their principal optical axes are separated into two groups by offsetting or separating one group of partial lenses relative to the other two groups of partial lenses by a certain distance. These two principal optical axes are kept parallel, and the three sets of partial positive lenses are positioned close to each other on the focal plane of the outgoing light side. The principal optical axis 401 is shared by lens segments 201 and 203, and the principal optical axis 402 corresponds to lens segment 202. The collimated light falling on the refraction device 200 is converged by the partial positive lenses 201, 203, and 202 that make up the refraction device. The converging light receiving device 300 is placed near the focal plane of the three sets of partial lenses that make up the refraction device 200 on the outgoing light side. The light rays converged by lens segments 201 and 203 fall on the entrance surface of the converging light receiver 300, forming a light spot centered on the intersection of the principal optical axis 401 and the entrance surface of the converging light receiver 300; the light rays converged by lens segment 202 fall on the entrance surface of the converging light receiver 300, forming a light spot centered on the intersection of the principal optical axis 402 and the entrance surface of the converging light receiver 300. In this way, the energy of the converged beam is distributed to two separate light spots, greatly reducing the optical power density carried by the entrance surface of the converging light receiver.

[0042] The refractive device described in this embodiment consists of three sets of partial lenses derived from a complete lens of the same type; this is a special case. In fact, it can also be composed of three sets of partial lenses derived from different types of complete lenses, as provided in the previous embodiment. These partial lenses should have different surface shapes, refractive indices, and sizes. The original complete lens could even be multiple closely spaced lens groups. As long as they have similar focal plane positions on the outgoing light side when combined, and one set of partial lenses has its own principal optical axis while the other two sets share a separate principal optical axis, the incident collimated beam can still form two energy centers near the focal plane. This achieves the same goal of significantly reducing the maximum power density of the beam and effectively adjusting the energy distribution of the converging light on the converging light receiving device.

[0043] In this embodiment, the three sets of partial lenses in the refractive device are separated from the principal optical axis by offsetting the two side partial lenses by the same distance relative to the dividing surface of the middle partial lens in the same direction. This results in the middle partial lens focusing the incident collimated beam onto one side, while the two side partial lenses focus the beam onto the other side. This is not the only offsetting method; alternatively, the middle and one side partial lenses can remain stationary while the other side partial lens is offset relative to them. This also achieves the purpose of separating the beam into two principal optical axes and focusing the incident collimated beam into two separate beams. This is suitable for situations where the three partial lenses in this refractive device are derived from different types of complete lenses, and the incident light energy distribution is uneven.

[0044] The converging light receiving device 300 refers to an optical device placed near the focal plane on the side of the emitted light of the three sets of partial lenses that make up the refraction device 200. Common examples include diffusers and integrating bars. By using the refraction device 200, the incident light beams 100 from the light emitting device are converged into three separate light spots. If the converging light receiving device is a diffuser, the maximum light power density falling on the entrance and exit surfaces of the diffuser can be greatly reduced, even to one-third of that in the case of a single principal axis. If the converging light receiving device is an integrating bar, not only can the maximum light power density falling on the entrance surface of the integrating bar be greatly reduced, even to one-third of that in the case of a single principal axis, but the converged light is incident on the entrance surface of the integrating bar as three separate light spots, which improves the distribution of the beam on the entrance surface and makes the integration effect of the integrating bar more effective. It can even allow the integrating bar to achieve the same integration effect with a shorter length.

[0045] In this invention, the dividing surfaces of the individual lens segments do not have to be parallel when they are assembled. As long as the optical axes of each lens segment can be separated to the required degree and the incident light is not missed, it is also feasible.

[0046] This invention uses a cutting and splicing method to form a refractive body, dispersing the light spot without losing light energy. Furthermore, the lens fragments can be sourced from lenses with defects in some areas but intact parts, reusing discarded lenses in a green and environmentally friendly manner while achieving the projection effect of a refractive body. This invention addresses the problem of ring-shaped burns easily caused on the receiving surface used to receive the light spot. According to the converging method provided by this invention, the relative position of the light spot on the entrance surface of the converging light receiving device is adjusted. Thus, when the converging light receiving device is placed near the focal plane, its maximum power density of received light is significantly lower than in the case of a single principal optical axis. Moreover, the receiving surface (converging light receiving device 300) can be evenly utilized by rotating the refractive body, preventing localized damage.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A refractive device composed of multiple lens segments, characterized in that, include: Three lens segments are combined into a refractive body, and the optical axes of each lens segment have multiple non-converging optical axes after being combined into the refractive body; After being transmitted through each of the lens segments, the incident light exits along its respective optical axis onto the receiving surface, where there are scattered light spots.

2. The refractive device according to claim 1, characterized in that, Each of the aforementioned lens segments is a portion separated from the same or different types of lenses / lens groups.

3. The refractive device according to claim 2, characterized in that, Each of the aforementioned lens segments is a portion separated from a single lens, and / or a portion separated from a lens group consisting of three lenses.

4. The refractive device according to claim 1, characterized in that, The distance between each lens segment and the receiving surface varies with the focal length of each lens segment.

5. The refractive device according to claim 1, characterized in that, When the lens segments with different focal lengths are combined, they are fixed by a fixing device.

Images