Anti-reflection laser radar window outer cover with high hardness, anti-fog capability and self-cleaning capability
By designing a multi-layer membrane structure on the outer cover of the lidar window, the problems of dirt, scratches, and low transmittance were solved, achieving high hardness, self-cleaning, and anti-fog functions, thus improving the performance of the lidar.
Patent Information
- Application Number
- CN202422779620.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-14
AI Technical Summary
Existing lidar windows are prone to getting dirty and scratched, have low transmittance, and lack self-cleaning and anti-fog functions, affecting detection accuracy and range.
The outer cover employs a multilayer membrane structure, including a polysiloxane or polymethyl methacrylate hardening layer, alternating hollow silica particles or a magnesium fluoride and titanium lanthanum mixture antireflection layer, and a modified hydrophilic silica hydrophilic layer, which endows the outer cover with high hardness, wear resistance, self-cleaning and anti-fogging properties.
The improved transmittance of the outer casing enhances the measurement range and accuracy of the lidar, prevents the effects of dirt and fog, and ensures accurate detection.
Smart Images
Figure CN223582136U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical film technical field especially relates to a kind of high hardness, anti-fog and self-cleaning ability's antireflection laser radar window cover. BACKGROUND
[0002] Laser radar is a kind of emission detection signal (laser beam) to measured target, measures the arrival time, the parameter such as intensity of reflected or scattered signal, to determine the distance, direction, motion state and surface optical characteristic of target.The laser radar cover of protective effect is particularly crucial, if window surface appears dirty, scratch and other problems, then it will directly affect the detection accuracy of laser radar.In addition, the transmittance of cover also affects the detection distance of laser radar, the higher the transmittance of cover, the farther the distance that laser radar can detect, if outer surface of cover does not have self-cleaning function, inner surface does not have anti-fog function, then dirt and fog are easy to affect laser radar, therefore we need a kind of antireflection laser radar window cover with high hardness, friction resistance, and outer surface has self-cleaning function, inner surface has anti-fog function, can effectively avoid the influence of dirt and fog on laser radar. SUMMARY
[0003] The utility model aims at providing a kind of high hardness, anti-fog and self-cleaning ability's antireflection laser radar window cover, can effectively protect the performance of radar.
[0004] To achieve the above object, the utility model adopts the following technical scheme implementation:
[0005] The utility model provides a kind of high hardness, anti-fog and self-cleaning ability's antireflection laser radar window cover, including PC plastic piece, the upper surface of PC plastic piece is provided with first hardening layer, the lower surface of PC plastic piece is provided with second hardening layer, the upper surface of first hardening layer is provided with first antireflection layer, the lower surface of second hardening layer is provided with second antireflection layer, the upper surface of first antireflection layer is provided with first hydrophilic layer, the lower surface of second antireflection layer is provided with second hydrophilic layer.
[0006] Further, the material of first hardening layer and second hardening layer is polysiloxane or polymethyl methacrylate material;The material of first antireflection layer and second antireflection layer is hollow silica particle or the alternate film layer of magnesium fluoride and titanium and lanthanum mixture;The material of first hydrophilic layer and second hydrophilic layer is modified hydrophilic silica.
[0007] Further, the thickness of first hardening layer and second hardening layer is 1~10 μm: the thickness of first antireflection layer and second antireflection layer is 10~50 nm;The thickness of first hydrophilic layer and second hydrophilic layer is 50~150 nm.
[0008] Further, the anti-reflection laser radar window cover is C-shaped.
[0009] Further, the anti-reflection laser radar window cover is cylindrical.
[0010] The radar performance is effectively protected by the high hardness and friction resistance of the anti-reflection laser radar window cover, and the influence of dirt and fog on the laser radar is avoided by the self-cleaning function of the outer surface and the anti-fog function of the inner surface. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 The utility model discloses a structure schematic diagram.
[0012] Figure 2 It is C-shaped schematic diagram of anti-reflection laser radar window cover.
[0013] Figure 3 It is cylindrical schematic diagram of anti-reflection laser radar window cover.
[0014] Figure 4 It is U-shaped schematic diagram of anti-reflection laser radar window cover.
[0015] Figure 5 It is D-shaped schematic diagram of anti-reflection laser radar window cover.
[0016] In the drawing, 1-PC plastic part, 2-first hardening layer, 3-second hardening layer, 4-first anti-reflection layer, 5-second anti-reflection layer, 6-first hydrophilic layer, 7-second hydrophilic layer. DETAILED DESCRIPTION
[0017] The utility model will be further described below in connection with the drawings.
[0018] Please refer to Figures 1 to 4 The utility model provides an embodiment:
[0019] Please refer to Figure 1 An anti-reflection laser radar window cover with high hardness, anti-fog and self-cleaning ability, comprising a PC plastic part 1, a first hardening layer 2 is arranged on the upper surface of the PC plastic part 1, a second hardening layer 3 is arranged on the lower surface of the PC plastic part 1, a first anti-reflection layer 4 is arranged on the upper surface of the first hardening layer 2, a second anti-reflection layer 5 is arranged on the lower surface of the second hardening layer 3, a first hydrophilic layer 6 is arranged on the upper surface of the first anti-reflection layer 4, and a second hydrophilic layer 7 is arranged on the lower surface of the second anti-reflection layer 5.
[0020] Please refer to Figure 1The material of the first hardening layer 2 and the second hardening layer 3 is polysiloxane or polymethyl methacrylate; the material of the first anti-reflection layer 4 and the second anti-reflection layer 5 is hollow silica particles or an alternating film layer of magnesium fluoride mixed with titanium and lanthanum; the material of the first hydrophilic layer 6 and the second hydrophilic layer 7 is modified hydrophilic silica. The first hardening layer 2 and the second hardening layer 3 give the PC plastic part good hardness and wear resistance, the first anti-reflection layer 4 and the second anti-reflection layer 5 increase the transmittance of the cover, the first hydrophilic layer 6 and the second hydrophilic layer 7 form a water film on the outer surface of the cover when encountering rain, so that it is not affected by raindrops and the surface dirt is removed, and a thin water film is formed on the inner surface when encountering fog, so that the surface does not produce diffuse reflection effect, which does not affect the laser emission and reception.
[0021] Please refer to Figure 1 The thickness of the first hardening layer 2 and the second hardening layer 3 is 1-10 μm; the thickness of the first anti-reflection layer 4 and the second anti-reflection layer 5 is 10-50 nm; the thickness of the first hydrophilic layer 6 and the second hydrophilic layer 7 is 50-150 nm. The surface hardness of the PC plastic part itself is very soft and easy to scratch. If the hardening layer is too thin, the film layer cannot form effective support, and it is easy to be pressed into the PC when encountering hard collision or scratching, resulting in scratches, so the thickness of the hardening layer is 1-10 μm.
[0022] Please refer to Figure 2 The cover of the anti-reflection laser radar window cover is C-shaped.
[0023] Please refer to Figure 3 and Figure 4 The cover of the anti-reflection laser radar window cover is cylindrical. It can also be applied to different shapes of anti-reflection laser radar window covers according to needs, such as Figure 4 is a U-shaped schematic diagram of the anti-reflection laser radar window cover, and Figure 5 is a D-shaped schematic diagram of the anti-reflection laser radar window cover.
[0024] Working principle: the multifunction of the laser radar cover is mainly realized by stacking multiple film layers, from inside to outside, there are hardening layer, antireflection layer and hydrophilic layer, the hardening layer gives the cover surface high hardness and wear resistance, the antireflection layer gives the cover high transmittance, and the hydrophilic layer gives the outer surface of the cover self-cleaning performance and the inner surface anti-fog performance. The PC plastic part 1 is mainly black infrared-transparent material, which eliminates the influence of visible light on the laser radar while allowing infrared light to be emitted and received, the hardening layer material is mainly polysiloxane or polymethyl methacrylate material, with a thickness of 1-10μm, which gives the PC plastic part 1 good hardness and wear resistance while not affecting the bulletproof performance of the PC plastic part 1; the main material of the antireflection layer is hollow silica particles or alternating film layers of magnesium fluoride mixed with titanium and lanthanum, but the top layer is a silica film layer with a thickness of 10-50nm, which mainly increases the transmittance of the cover, and the transmittance of the cover can reach more than 96% in the range of 855-955nm, and the inner surface antireflection layer can also reduce the light reflection of the equipment components and improve the imaging distortion problem of the radar; the main material of the hydrophilic layer is modified hydrophilic silica with a thickness of 50-150nm, the surface energy of the hydrophilic layer is very large, and the contact angle is very low (contact angle <10°), which is a super-hydrophilic film layer, specifically, when in contact with liquid water, the liquid water can fully wet the surface, thereby washing away the surface dirt and achieving the effect of rain self-cleaning, and when it rains, a water film is formed on the surface, which will not affect the imaging due to raindrops; when in contact with water vapor, the water vapor condenses on the surface of the hydrophilic layer without forming mist (small water droplets), but forms a uniform water film, thereby not affecting the light fiber transmittance and achieving the anti-fog effect, and the film layers can be freely combined in order, for example, only high hardness and antireflection performance are needed, then only the hardening layer and the antireflection layer need to be prepared; if high hardness and self-cleaning / anti-fog function are needed, then only the hardening layer and the hydrophilic layer need to be prepared. At the same time, the outer surface can be used with multiple film layers, the inner surface can be used with single film layer or no film layer to meet different needs.
Claims
1. An anti-reflective lidar window cover with high hardness, anti-fogging, and self-cleaning capabilities, characterized in that: The PC plastic part is provided with a first hardening layer on its upper surface, a second hardening layer on its lower surface, a first anti-reflection layer on the upper surface of the first hardening layer, a second anti-reflection layer on the lower surface of the second hardening layer, a first hydrophilic layer on the upper surface of the first anti-reflection layer, and a second hydrophilic layer on the lower surface of the second anti-reflection layer.
2. The anti-reflective lidar window cover with high hardness, anti-fogging and self-cleaning capabilities according to claim 1, characterized in that: The thickness of the first and second hardening layers is 1-10 microns, the thickness of the first and second anti-reflection layers is 10-50 nanometers, and the thickness of the first and second hydrophilic layers is 50-150 nanometers.
3. The high hardness, anti-fog and self-cleaning transmittance laser radar window cover of claim 1, wherein: The anti-reflection laser radar window outer cover is C-shaped.
4. The high hardness, anti-fog, and self-cleaning, anti-reflection laser radar window cover of claim 1, wherein: The anti-reflection laser radar window outer cover is cylindrical.