TWI674447B - Method for adjusting a reflection mode of a reflective film - Google Patents

Abstract

A reflection mode adjustment method of a reflective sheet is used to solve the problem that the conventional reflective sheet reflects light along the incident direction and cannot change the angle of the reflected light. The system comprises: a first reflecting surface, a second reflecting surface and a third reflecting surface are bonded to each other to form a light reflecting unit, and the first reflecting surface and the second reflecting surface have a first angle between the first reflecting surface and the first reflecting surface; A second included angle is formed between the reflective surface and the third reflective surface, and a second included angle is formed between the second reflective surface and the third reflective surface; the first included angle and the second included angle are adjusted; light acts on the The reflecting unit generates a reflected light intensity analysis chart; and according to the reflected light intensity analysis chart, positions of several reflected light points are marked with an azimuth angle and a polarization angle.

Description

Adjustment method of reflection mode of reflective sheet

The invention relates to a traffic safety reflective device, in particular to a method for adjusting the reflection mode of a reflective sheet that can change the angle and illuminance of reflected light according to demand.

Please refer to FIGS. 1 to 3, which are a conventional retro-reflective reflector 9 which is composed of a plurality of pyramids 91 closely arranged, and each of the pyramids 91 and its adjacent A plurality of grooves 92 are formed between the pyramids 91. Each of the pyramids 91 has a slope coefficient and a reflection surface 93. Each of the grooves 92 is surrounded by three reflection surfaces 93. The three reflection surfaces 93 are perpendicular to each other. When light enters the groove 92 at an arbitrary angle, the light is sequentially reflected on the three reflecting surfaces 93, and according to the principle of reflection, the final reflected light is incident in parallel with the light and leaves the groove 92 in the opposite direction. Therefore, the light source is projected on the conventional retro-reflective reflector 9 so that the light can travel straight and straight.

The above-mentioned conventional retro-reflective reflector 9 is generally applied to traffic signs, road signs or installed on the front and back sides of vehicles. The retro-reflective reflector 9 is illuminated by the headlights of other vehicles, which can generate reflected light warnings. Because of the effect of the retro-reflective sheeting 9 on traffic safety when driving a vehicle, the reflection angle, light intensity and other modes of the retro-reflective sheeting 9 must meet the standards established by traffic safety regulations. The formulated standard specifications are not the same, which leads to the illegal installation of the retroreflective reflector 9 of the vehicle and affects the traffic safety.

For this reason, the conventional reflectors do still need to be improved.

In order to solve the above problems, an object of the present invention is to provide a method for adjusting the reflection mode of a reflective sheet, which can analyze the reflection mode of light acting on the reflective sheet.

A secondary object of the present invention is to provide a reflection mode adjustment method for a reflective sheet, which can adjust the light intensity of the reflected light generated by the reflective sheet to meet the specifications of the reflective sheet.

Another object of the present invention is to provide a reflective sheet, which can adjust the reflection angle of the reflected light generated by the reflective sheet to meet the specifications of the reflective sheet.

The reflection mode adjustment method of a reflective sheet of the present invention includes: forming a reflective unit by joining a first reflective surface, a second reflective surface, and a third reflective surface to each other; There is a first included angle between the first reflective surface and the third reflective surface, and a second included angle between the second reflective surface and the third reflective surface. The angle between the angle and the second included angle is not equal to 90 °; adjusting the first included angle and the second included angle; light acting on the reflective unit to generate a reflected light intensity analysis chart; and based on the reflected light intensity analysis chart, a The azimuth and a polarization angle indicate the positions of several reflected light spots.

According to this, the reflection mode adjustment method of the reflective sheet of the present invention changes the reflection angle and the intensity of the reflected light generated by the reflective sheet by adjusting the angles of the first included angle and the second included angle, and through experiments and analysis of various angles The change can be adjusted by the reflection angle, light intensity and other reflection modes of the reflector to meet various legal specifications. It is used for traffic signs, road signs or vehicles, and has the effect of improving traffic safety. In addition, the system can prevent light from converging and converging after reflection, and has the effect of improving the propagation range of reflected light.

The angle of the first included angle is equal to the angle of the second included angle. This has the effect of uniformly dispersing the reflected light in all directions.

The angle of the first included angle is greater than the angle of the second included angle. In this way, the azimuth difference between the plurality of reflected light spots is reduced, which has the effect of increasing the intensity of the reflected light.

The angle of the first included angle is smaller than the angle of the second included angle. In this way, the azimuth angle difference between several reflected light spots increases, which has the effect of increasing the coverage of the reflected light.

The angle of the first included angle is adjusted, and the angle of the second included angle is fixed. In this way, the azimuth difference between the plurality of reflected light points is negatively correlated with the first included angle, and has the effect of adjusting the intensity of the reflected light.

The angle of the first included angle is fixed, and the angle of the second included angle is adjusted. In this way, the azimuth difference between the reflected light spots is positively related to the second included angle, and has the effect of adjusting the intensity of the reflected light.

Wherein, the azimuth angle is circled counterclockwise from 0 ° to 360 °. In this way, it has the effect of indicating the density of the reflected light spots.

The polarization angle ranges from 0 ° to 90 ° and is indicated on a plane in the direction of 0 ° of the azimuth. This has the effect of indicating the reflection angle of the reflected light.

〔this invention〕

1‧‧‧Reflective unit

11‧‧‧First reflecting surface

12‧‧‧Second reflective surface

13‧‧‧ Third reflecting surface

α‧‧‧First angle

β‧‧‧ the second angle

ψ‧‧‧azimuth

θ‧‧‧ polarization angle

〔Usually〕

9‧‧‧ retro-reflective reflector

91‧‧‧ pyramid

92‧‧‧Groove

93‧‧‧Reflective surface

[Fig. 1] A perspective view of an arrangement of pyramid cores of a conventional reflector.

[Fig. 2] A combined perspective view of a partial pyramid core as shown in Fig. 1.

[Figure 3] A plan view of a partial pyramid core as shown in Figure 2.

[Fig. 4a] A front view of a reflecting surface of the first embodiment of the present invention.

[FIGS. 4b to 4d] An analysis chart of reflected light intensity according to the first embodiment of the present invention.

[Fig. 5a] A front view of a reflecting surface of a second embodiment of the present invention.

[FIGS. 5b to 5c] An analysis chart of reflected light intensity in the second embodiment of the present invention.

[Fig. 6a] A front view of a reflecting surface of a third embodiment of the present invention.

[FIGS. 6b to 6c] A reflection light intensity analysis chart according to a third embodiment of the present invention.

[Fig. 7a] A front view of a reflecting surface to which the present invention is applied to the European standard.

[Fig. 7b] An analysis chart of reflected light intensity as shown in Fig. 7a.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following describes the preferred embodiments of the present invention in detail with the accompanying drawings as follows: Please refer to FIG. 4a, The method for adjusting the reflection mode of the reflective sheet of the present invention is applied to a reflective unit 1 having a first reflective surface 11, a second reflective surface 12 and a third reflective surface 13. The first reflective surface 11 and There is a first included angle α between the second reflective surface 12, a second included angle β between the first reflective surface 11 and the third reflective surface 13, and the second reflective surface 12 and the third reflective surface 13 There is also a second included angle β therebetween, wherein the first included angle α or the second included angle β is preferably not equal to 90 °, which can prevent the light from converging and converging after it enters the reflective unit 1 and cannot reflect the light to the far end. .

Please refer to Figs. 4a to 4d, which are the first embodiment of the method for adjusting the reflection mode of the reflecting sheet of the present invention, and the first angle α and the second angle β of the reflecting unit 1 are adjusted. Figures 4b, 4c, and 4d are analysis charts of the reflected light intensity generated by the reflecting unit 1 after adjustment. The relative positional relationship between several reflected light points and an origin point can be determined by an azimuth angle ψ and a polarization angle. θ is expressed as the coordinate position (ψ, θ), and the origin can be expressed as (0 °, 0 °). Moreover, the density of the reflected light spots is proportional to the intensity of the reflected light. The distance between the reflected light point and the origin can be used to determine the reflection angle of the reflected light, and the distance between the plurality of reflected light points can be used to obtain the reflected light intensity. In the reflected light intensity analysis chart, the azimuth angle ψ can be rotated counterclockwise from 0 ° to 360 °, and the polarization angle θ can be from 0 ° to 90 ° and marked at 0 ° of the azimuth angle ψ The plane of the direction is used to analyze and explain the reflection angle and intensity of the reflected light, and the present invention is not limited to this marking method.

When the first included angle α and the second included angle β are 90 °, the light path goes straight back through the reflection system, that is, the incident direction is 180 ° different from the reflected direction. As shown in FIG. 4b, the several reflected light points The coordinate position (0 °, 0 °) overlapping the origin.

By adjusting the first included angle α and the second included angle β to be 90.01 °, as shown in FIG. 4C, the reflected light spots are dispersed at equal intervals along the azimuth angle ψ direction, and the polarization angles θ are all 0.033. °, the reflection points are located at the coordinate positions (0 °, 0.033 °), (60 °, 0.033 °), (120 °, 0.033 °), (180 °, 0.033 °), (240 °, 0.033 ° ), (300 °, 0.033 °).

By adjusting the first included angle α and the second included angle β to be 90.02 °, as shown in FIG. 4D, the reflected light spots are dispersed at equal intervals along the azimuth angle ψ direction, and the polarization angles θ are all 0.064. °, the reflected light points are located at the coordinates (0 °, 0.064 °), (60 °, 0.064 °), (120 °, 0.064 °), (180 °, 0.064 °), (240 °, 0.064 °) ), (300 °, 0.064 °).

Please refer to FIGS. 5a to 5c, which are the second embodiment of the reflection mode adjustment method of the reflective sheet of the present invention, which adjust the first included angle α of the reflective unit 1 and the second included angle β is fixed at 90.01 ° Wherein, FIG. 5b is an analysis chart of the intensity of the reflected light generated by the reflecting unit 1 when the first included angle α is greater than or equal to the second included angle β; FIG. 5c is the first included angle α less than or equal to the second included angle β At this time, an analysis chart of the intensity of the reflected light generated by the reflective unit 1.

By fixing the second included angle β to 90.01 ° and adjusting the angle of the first included angle α to increase, as shown in FIG. 5b, when the first included angle α is 90.01 °, the reflected light points are located at the coordinates. Position (60 °, 0.033 °), (0 °, 0.033 °), (300 °, 0.033 °); when the first included angle α is 90.05 °, the reflected light points are located at the coordinate position (19.6 °, 0.088 °), (0 °, 0.098 °), (340.4 °, 0.088 °); when the first included angle α is 90.09 °, the reflected light points are located at the coordinates (11.2 °, 0.151 °), (0 ° , 0.164 °), (348.8 °, 0.151 °).

By fixing the second included angle β to 90.01 ° and adjusting the angle of the first included angle α to decrease, as shown in FIG. 5c, when the first included angle α is 90.01 °, the reflected light points are located at the coordinates. Position (60 °, 0.033 °), (0 °, 0.033 °), (300 °, 0.033 °); when the first included angle α is 90.007 °, the reflected light points are located at the coordinate position (68.5 °, 0.03 °), (0 °, 0.027 °), (291.5 °, 0.03 °); when the first included angle α is 90.003 °, the reflected light points are located at the coordinates (78.2 °, 0.028 °), (0 ° , 0.021 °), (281.8 °, 0.028 °).

It can be known from the above-mentioned second embodiment that when the second included angle β is fixed and the size of the first included angle α is adjusted, the difference in azimuth angle ψ between the reflected light spots is negatively related to the first included angle α. , And the polarization angle θ of the reflected light spot is positively correlated with the first included angle α. Therefore, increasing the angle of adjusting the first included angle α will cause the gap between the azimuth angle ψ to decrease and the polarization angle θ to increase. It is possible to increase the density (reflected light intensity) of the plurality of reflected light spots and increase the reflection angle of the reflected light.

Please refer to FIGS. 6a to 6c, which is a third embodiment of the reflection mode adjustment method of the reflective sheet of the present invention, which fixes the first included angle α of the reflective unit 1 to 90.01 °, and adjusts the second included angle β Wherein, FIG. 6b is an analysis chart of the reflected light intensity generated by the reflecting unit 1 when the second included angle β is greater than or equal to the first included angle α; FIG. 6c is a second included angle β that is less than or equal to the first included angle α At this time, an analysis chart of the intensity of the reflected light generated by the reflective unit 1.

By fixing the first included angle α to 90.01 ° and adjusting the angle of the second included angle β to increase, as shown in FIG. 6b, when the second included angle β is 90.01 °, the reflected light points are located at the coordinates. Position (60 °, 0.033 °), (0 °, 0.033 °), (300 °, 0.033 °); when the second included angle β is 90.05 °, the reflected light points are located at the coordinate position (83.5 °, 0.144 °), (0 °, 0.098 °), (276.5 °, 0.144 °); when the second included angle β is 90.09 °, the reflected light spots are located at the coordinates (86.5 °, 0.255 °), (0 ° , 0.164 °), (273.5 °, 0.255 °).

By fixing the first included angle α to 90.01 ° and adjusting the angle of the second included angle β to decrease, as shown in FIG. 6c, when the second included angle β is 90.01 °, the reflected light points are located at the coordinates. Position (60 °, 0.033 °), (0 °, 0.033 °), (300 °, 0.033 °); when the second included angle β is 90.007 °, the reflected light points are located at the coordinate position (51.3 °, 0.026 °), (0 °, 0.027 °), (308.7 °, 0.026 °); when the second included angle β is 90.003 °, the reflected light points are located at the coordinates (27.5 °, 0.017 °), (0 ° , 0.021 °), (332.5 °, 0.017 °).

It can be known from the third embodiment that when the first included angle α is fixed and the size of the second included angle β is adjusted, the difference in azimuth angle ψ between the reflected light spots is positively related to the second included angle β. And the polarization angle θ of the reflected light spot is positively correlated with the second included angle β. Therefore, increasing the angle of adjusting the second included angle β will cause the azimuth angle ψ gap and the polarization angle θ to increase, which can reduce The density (reflected light intensity) of the plurality of reflected light spots, and the reflection angle of the reflected light is increased.

Please refer to Figs. 7a and 7b. The reflection mode adjustment method of the reflection sheet of the present invention is a combination of the adjustment rules and results of the foregoing embodiments, which can change the reflection angle of the reflection light generated by each reflection unit 1 on the reflection sheet and The reflected light intensity is increased by adjusting the first included angle α to 90.195 ° and the second included angle β to be 90.0065 °. As shown in FIG. 7b, the difference in azimuth ψ between the reflected light spots is less than 10 degrees, and The polarization angles θ of the reflected light spots are between 0.3 ° and 0.35 °, which are in compliance with the specifications of the Economic Commission of Europe (ECE). However, the present invention can adjust the reflection according to the purpose of the reflector The light angle and intensity are not limited to this.

In summary, the method for adjusting the reflection mode of the reflective sheet of the present invention changes the reflection angle and the intensity of the reflected light generated by the reflective sheet by adjusting the angles of the first included angle and the second included angle, through experiments and analysis. Various angle changes can reflect the reflection angle, light intensity and other reflection modes of the reflector to comply with various legal specifications. It is used for traffic signs, road signs or vehicles, and has the effect of improving traffic safety.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention. The technical scope protected by the invention, so the scope of protection of the present invention shall be determined by the scope of the appended patent application.

Claims (8)

A method for adjusting the reflection mode of a reflective sheet includes: a first reflecting surface, a second reflecting surface, and a third reflecting surface are bonded to each other to form a reflecting unit, and the first reflecting surface and the second reflecting surface have a space therebetween. A first included angle, a second included angle between the first reflective surface and the third reflective surface, a second included angle between the second reflective surface and the third reflective surface, an angle of the first included angle and The angle of the second included angle is not equal to 90 °; adjusting the first included angle and the second included angle; light acting on the reflecting unit to generate a reflected light intensity analysis chart; and an azimuth angle based on the reflected light intensity analysis chart And a polarization angle indicates the positions of several reflected light spots. According to the method for adjusting the reflection mode of the reflective sheet according to item 1 of the scope of the patent application, wherein the angle of the first included angle is equal to the angle of the second included angle. The method for adjusting the reflection mode of the reflective sheet according to item 1 of the scope of the patent application, wherein the angle of the first included angle is greater than the angle of the second included angle. The method for adjusting the reflection mode of the reflective sheet according to item 1 of the scope of the patent application, wherein the angle of the first included angle is smaller than the angle of the second included angle. The method for adjusting the reflection mode of the reflective sheet according to item 1 of the scope of the patent application, wherein the angle of the first included angle is adjusted, and the angle of the second included angle is fixed. The method for adjusting the reflection mode of the reflective sheet according to item 1 of the scope of the patent application, wherein the angle of the first included angle is fixed and the angle of the second included angle is adjusted. The method for adjusting the reflection mode of the reflector as described in item 1 of the scope of the patent application, wherein the azimuth angle makes a circle in a counterclockwise direction from 0 ° to 360 °. The method for adjusting the reflection mode of the reflector according to item 7 of the scope of the patent application, wherein the polarization angle is from 0 ° to 90 ° and is marked on a plane in the direction of 0 ° of the azimuth.