Device and method for forming round rainbow on ground by using water mist

Abstract

The invention discloses a device and method for forming a complete circular rainbow by using water mist, and belongs to the technical field of photography assistion.The device comprises a light source assembly, a mist spraying assembly and a lifting platform, a light source adopts a combination of a universal joint and a lifting support, the height and the pitch angle of + / -90 degrees are adjusted, and by adjusting the mist spraying pressure of a high-pressure nozzle, the complete circular rainbow is formed. The particle size of sprayed water mist is controlled within the range of 200-500 microns, and the rainbow definition is improved; a complete circular rainbow can be shot by optimizing the height and angle of the light source and the height of the water mist area and placing a lens of the shooting equipment at a position with the same height as the light source and a proper distance from the water mist area through the lifting platform; in addition, a light source assembly or a reflecting mirror can be additionally arranged to form a cross rainbow or a hyperbolic rainbow, the problems that a traditional artificial rainbow is single in form and poor in scene adaptability are solved, forming and capturing of a complete circular rainbow are achieved, shooting at night and in the indoor environment is supported, and the device can be widely applied to photography in various scenes.

Description

Technical Field

[0001] The present invention relates to the field of photographic assistance technologies, and particularly to a device and method for forming a circular rainbow on the ground using water mist, which form a complete circular rainbow by controlling the light source, spray parameters, and shooting position. Background Art

[0002] In nature, the rainbow that appears after rain is magnificent and gives people the enjoyment of beauty, and is deeply loved by people. However, rainbows are not common, and even when they appear, they usually last for a relatively short time. Rainbows in nature generally appear after summer rain, which is caused by the refraction of sunlight into nearly circular water droplets in the air, resulting in dispersion and reflection. When sunlight shines on spherical water droplets, it enters at different angles. The light undergoes refraction, reflection, and again refraction inside the water droplet. When the angle between the outgoing light and the incident light is between 40° and 42°, obvious dispersion occurs, which is the basic reason for the formation of a rainbow. This angle is called the Cartesian angle, also known as the rainbow angle, and the corresponding outgoing light is called the Cartesian ray.

[0003] Existing rainbow generation technologies can be achieved by adhering millimeter-sized glass beads to the surface of a substrate, but they have the following defects: the rainbow form is fixed, lacking dynamic beauty; the glass beads are separated from natural scenery and are difficult to integrate into photographic creation; it can only be achieved under specific lighting conditions and cannot meet the needs of night photography. And traditional devices for forming rainbows using water spraying devices can only observe a semi-circular arc of the rainbow and cannot form a complete circular rainbow. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the existing rainbow-assisted photography technologies, such as the single form of the rainbow, lack of natural beauty, and inability to integrate with the environment, and to propose a device and method for forming a circular rainbow on the ground using water mist, which can form a complete circular rainbow, especially suitable for rainbow-assisted creative shooting at night or in specific scenarios.

[0005] To solve the above technical problems, the present invention provides a device for forming a circular rainbow on the ground using water mist, including:

[0006] A light source assembly, including a light source bracket capable of adjusting the height and a light source, and the light source is installed on the light source bracket through a universal joint;

[0007] A spray assembly, including a spray bracket capable of adjusting the height, a cross bar is installed on the spray bracket, an arc-shaped pipe connected to a pressurized water supply device is installed below the cross bar, and high-pressure nozzles are evenly distributed below the arc-shaped pipe to spray water mist to form a uniformly distributed spray area;

[0008] The lifting platform is located between the water spraying component and the spraying area, and is used to place the photographing device, making the lens of the photographing device at the same height as the light source, and the included angle θ between the line of sight of the lens and the incident light of the light source is 40 - 42°.

[0009] Preferably, it further includes a base. The surface of the base is provided with a slide rail, which is located between the spraying area and the light source assembly. The lifting platform is installed on the slide rail and can move along the slide rail to facilitate adjusting the photographing distance according to the required size of the rainbow.

[0010] Preferably, self-locking mobile wheels are installed under the base, which is convenient for freely moving and locking according to the scene requirements.

[0011] Preferably, the light source is a white light source, the power of the light source is ≥500 lumens, the color temperature is 5000 - 6500K, simulating the natural light spectrum, and with a 15° divergence angle design, a uniform illumination area is formed.

[0012] Preferably, the light source realizes a 0 - 90° pitch angle adjustment through the first universal joint.

[0013] Preferably, the aperture of the high-pressure nozzle is 0.2 - 0.5 mm, the particle size of the sprayed water mist is 200 - 500 μm, and the water mist density is 10 6 ~5×10 6 drops / m 3 , forming a stable optical medium.

[0014] The white light emitted by the light source is incident on the water droplets at a specific angle (adjusted by the first universal joint). The light undergoes the first refraction inside the water droplets, is reflected by the inner surface of the water mist, and then refracts out of the water droplets again. The included angle between the outgoing light and the incident light is 40 - 42° (Cartesian angle); the refractive indices of light with different wavelengths in the water droplets are different (1.343 for violet light and 1.331 for red light), resulting in different colored lights being emitted at different angles (40° for violet and 42° for red), thus forming a concentric circular spectrum with red on the outside and violet on the inside, which is the circular rainbow. In the present invention, by setting an adjustable-height light source and a spraying component, and optimizing the distance between the photographing device and the spraying area, the water droplets sprayed by the high-pressure nozzle reflect - refract - reflect the light source optical fiber, forming a circular rainbow that is completely captured and photographed. And by controlling the particle size d of the water droplets, a high-definition rainbow with bright colors is formed. It is possible to adjust the radius of the rainbow by adjusting the height h 1 of the light source, the height h 2 of the spraying area, the incident angle α of the light source light, and the photographing position, so as to obtain the required rainbow.

[0015] The present invention also provides a method for forming a ground circular rainbow using a water mist device. Using the above device, it includes the following steps:

[0016] S1. Set the device in the shooting area according to the scene requirements, and make the sprayed spray area located in front of the shooting area;

[0017] S2. Adjust the height h of the spray area according to the radius R of the rainbow to be formed 2 , the height h of the light source 1 and the elevation angle α of the light source;

[0018] S3. Adjust the height of the lifting platform so that the lens of the shooting device is at the same height as the light source, and the included angle θ between the lens line of sight and the incident light of the light source is θ ∈ [40°, 42°];

[0019] S4. Optimize the spray pressure so that the droplet size d of the fog droplets satisfies d ∈ [200μm, 500μm];

[0020] S5. Turn on the light source and the pressurized water supply device, and the light emitted by the light source forms a circular rainbow after refraction - reflection - refraction by the fog droplets.

[0021] Step S2 is specifically as follows:

[0022] S21. Set the height h of the light source according to the radius R of the rainbow to be formed 1 and make h 1 ≥ R, the height h of the spray area 2 and make h 2 ≥ h 1 + R and the horizontal distance L from the light source to the spray area 1 ;

[0023] S22. Adjust the elevation angle of the light source according to the incident angle of the light source;

[0024] S23. Calculate the horizontal distance between the lifting platform and the spray area according to the formula and adjust the position of the lifting platform accordingly, where θ is the optimal viewing angle, θ ∈ [40°, 42°].

[0025] The device of the present invention can form a complete circular rainbow at night, indoors or outdoors on cloudy days; by setting a light shield above the spray area to block sunlight, a circular rainbow can also be formed outdoors on sunny days, achieving the purpose of forming a circular rainbow in various situations.

[0026] The present invention can also use a mirror instead of a light source, use the sunlight reflected by the mirror as the light source, and change the incident angle of the sunlight to achieve the formation of a complete circular rainbow outdoors on sunny days.

[0027] The present invention can also form two rainbow rings (hyperbolic rainbows) by adding an auxiliary light source assembly with the same parameters as the light source assembly, and irradiating the same spray area or two adjacent spray areas with the two light sources at different angles respectively; by adjusting the height and angle of the two light sources, the two rainbow rings are crossed in space to form an "∞" - shaped or "x" - shaped crossed rainbow, and by synchronously adjusting the height and angle of the two light sources, the dynamic change of the intersection position and intersection angle is realized (if there are multiple groups of light sources, multi - curve rainbows or multi - crossed rainbows can also be formed). A dual - path independent control module is adopted to realize the synchronous or asynchronous adjustment of the height, angle and light intensity of the two light sources, and a laser calibrator is equipped to ensure that the incident angles of the two light sources are accurately aligned with the center of the spray area.

[0028] The present invention can also form a secondary rainbow by adding a plane mirror with a high reflectivity, which is installed on a bracket with adjustable height through a universal joint. By adjusting the position and angle of the mirror, it is ensured that the reflected light also meets the Cartesian angle condition. In this way, the direct light of the original light source forms the main rainbow, and the reflected light of the mirror can form the secondary rainbow, thus also being able to form a hyperbolic rainbow. By adjusting the height and reflection angle of the mirror, the two rainbows are crossed to form a crossed rainbow.

[0029] On the premise that the spray area and the illumination area are limited and the distance between the photographer and the spray area is fixed, a complete circular rainbow can be photographed by synchronously adjusting the spray angle and moving the photographing device and using the wide - angle mode or panoramic mode.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. The light source adopts a combination of a universal joint and a lifting bracket to realize continuous adjustment of the pitch angle of ±90° and height, so as to obtain a rainbow of appropriate size and meet the needs of more shooting scenarios;

[0032] 2. The high - pressure nozzle continuously sprays uniform droplets to achieve a continuous rainbow effect of ≥30 minutes; the droplet size is controlled within the range of 200 - 500 μm, improving the clarity of the rainbow;

[0033] 3. The lens of the photographing device is at the same height as the light source, and the distance between the photographing device and the rainbow (spray area) is optimized to ensure that a complete rainbow image is formed and photographed, which can be widely applied to photographic shooting in various scenarios.

[0034] 4. By optimizing the parameters of the light source, spray area and shooting position, the dynamic regulation and shooting of a complete circular rainbow are realized, solving the problems of the single form and poor scene adaptability of traditional artificial rainbows, realizing the dynamic adjustment of the rainbow radius, breaking through the limitation of natural light, supporting shooting in night and indoor environments, especially at night, the secondary rainbow "secondary rainbow" can be clearly shown.

[0035] 5. The present invention can also quickly achieve hyperbolic rainbows or multi - shaped cross rainbows on the basis of traditional single rainbows by adding auxiliary light sources or mirror components, and is applicable to scenarios such as high - end film shooting, commercial activities, and art exhibitions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 FIG. is a schematic diagram of the device for forming a circular rainbow on the ground using water mist in the first embodiment.

[0037] Figure 2 FIG. is a schematic diagram for optimizing the shooting position.

[0038] Figure 3 FIG. is a picture of the circular rainbow formed by the device of the first embodiment at night.

[0039] Figure 4 FIG. is a picture of the circular rainbow formed by the device of the first embodiment outdoors on a cloudy day.

[0040] Figure 5 FIG. is a picture of the rainbow formed by adding a light - shielding cover outdoors on a sunny day.

[0041] Figure 6 FIG. is a schematic diagram of the device for forming a double rainbow in the second embodiment.

[0042] Figure 7 FIG. is a picture of the cross rainbow formed by the device of the second embodiment.

[0043] Reference numerals:

[0044] 1 - light source assembly; 11 - light source bracket; 12 - universal joint; 13 - light source; 2 - spray assembly; 21 - spray bracket; 22 - cross bar; 23 - arc tube; 24 - high - pressure nozzle; 3 - lifting platform; 4 - base; 41 - slide rail; 5 - second light source assembly; 53 - second light source. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0046] First Embodiment

[0047] A device for forming a circular rainbow on the ground using water mist, as Figure 1 shown, includes:

[0048] Light source assembly 1, including a light source bracket 11 capable of adjusting height and a light source 13 with a power ≥ 500 lumens and a color temperature of 5000 - 6500K. The light source 13 is installed on the light source bracket 11 through a universal joint 12, and the height h of the light source 1 has an adjustment range of 0.5 - 2m, and the light source 13 can achieve a pitch angle adjustment of 0 - 90° through the universal joint 12;

[0049] Spray assembly 2, including a spray bracket 21 capable of adjusting height. A cross bar 22 is installed on the spray bracket 21, and the cross bar 22 can be adjusted in height on the spray bracket 21 to adjust the height h of the spray area 2 . Below the cross bar 22, an arc-shaped pipe 23 connected to a pressurized water supply device is installed. Five high-pressure nozzles 24 with apertures of 0.2 - 0.5mm are evenly distributed below the arc-shaped pipe 23. When the pressurized water supply device is turned on and the high-pressure nozzles 24 on the arc-shaped pipe 23 spray, a large-area spray area is formed; the aperture of the high-pressure nozzles is 0.2 - 0.5mm, the water mist particle size ejected is 200 - 500μm, and the water mist density is 106 - 5×106 drops / m3, forming a stable optical medium.

[0050] Lifting platform 3, which is used to provide a placement position for the shooting device and make the lens of the shooting device level with the light source 13. The lifting platform 3 is located between the light source assembly 1 and the spray area ejected by the spray assembly 2, and the included angle θ between the lens line of sight and the incident light of the light source is 40 - 42°.

[0051] Base 4, with a slide rail 41 on its surface. The slide rail 41 is located between the spray area and the light source assembly 1. The lifting platform 3 is installed on the slide rail 41 and can move along the slide rail 41 to facilitate adjusting the shooting distance according to the required size of the rainbow. A self-locking mobile wheel is installed below the base 4, which is convenient for freely moving and locking according to the needs of the scene.

[0052] Moreover, the present invention also provides a method for forming a ground circular rainbow using a water mist device. Using the above device, it includes the following steps:

[0053] S1. According to the needs of the scene, set the device in the shooting area and make the ejected spray area located in front of the shooting area;

[0054] S2. Adjust the height h of the spray area 2 , the height h of the light source 1 and the elevation angle α of the light source;

[0055] S3. Adjust the height of the lifting platform to make the lens of the shooting device level with the light source, and the included angle θ between the lens line of sight and the incident light of the light source ∈ [40°, 42°];

[0056] S4. Optimize the spray pressure so that the droplet size d satisfies d ∈ [200μm, 500μm];

[0057] S5. Turn on the light source and the pressurized water supply device. The light emitted by the light source forms a circular rainbow after refraction - reflection - refraction by the droplets.

[0058] Step S2 is specifically as follows:

[0059] S21. Set the height h of the light source according to the radius R of the rainbow to be formed 1 and make h 1 ≥ R, the height h of the spray area 2 and make h 2 ≥ h 1 + R and the horizontal distance L from the light source to the spray area 1 ;

[0060] S22. Adjust the elevation angle of the light source according to the incident angle of the light source;

[0061] S23. Calculate the horizontal distance between the lifting platform and the spray area according to the formula and adjust the position of the lifting platform accordingly, where θ is the optimal viewing angle, θ ∈ [40°, 42°], as Figure 2 shown.

[0062] Application Scenario 1: Night Outdoor Photography

[0063] To form a complete circular rainbow with a radius R = 2m, the horizontal distance L from the light source to the spray assembly 1 is 4m. Adjust the height of the light source to 2.5m, and the height of the crossbar of the spray assembly is 5m, so that the height h of the spray area 2 > 4.5m. Raise the lifting platform until the lens of the shooting device is at the same height as the light source. At the same time, move the lifting platform along the slide rail to a position 0.72 - 0.82m away from the spray area. Turn on the light source and the pressurized water supply device, and set the spray pressure so that the droplet size is in the range of 200 - 500μm, and the droplet density is 2×10 6 drops / m 3 . A complete circular rainbow with a diameter of 4m appears. The lowest point of the rainbow is 0.5m above the ground, and the boundary of the rainbow is clear. Place the shooting device on the lifting platform, with the camera facing away from the light source, and turn on the wide - angle shooting to obtain a complete circular rainbow image, as Figure 3 shown.

[0064] Application Scenario 2: Cloudy Day Outdoor Shooting

[0065] To form a complete circular rainbow with a radius R = 1.5m, the horizontal distance L from the light source to the spray assembly 1 is 6m. Adjust the height of the light source to 1.5m, and the height of the crossbar of the spray assembly is 3.5m, so that the height h of the spray area 2> 3m, raise the lifting platform until the lens of the shooting device is at the same height as the light source. At the same time, move the lifting platform along the slide rail to a position 0.48 - 0.56m away from the spraying area. Turn on the light source and the pressurized water supply device, and set the spraying pressure so that the droplet size is in the range of 200 - 500μm, and the droplet density is 2×10 6 droplets / m 3 , a complete circular rainbow with a diameter of 3m appears. The lowest point of the rainbow is on the ground, and the boundary of the rainbow is clear. Place the shooting device on the lifting platform, with the camera facing away from the light source for shooting, and a complete circular rainbow image is captured, as Figure 4 shown.

[0066] Application Scenario 3: Outdoor shooting on a sunny day

[0067] Set up a light shield above the spraying area to block sunlight, and form a circular rainbow using the same parameters as in Scenario 2, as Figure 5 shown.

[0068] Example 2

[0069] This example provides a device for forming an intersecting rainbow using water mist. As Figure 6 shown, a second light source assembly 5 with the same parameters as the light source assembly 1 is added to the device of Example 1. The second light source assembly 5 and the light source assembly 1 are arranged on the same side. The second light source assembly 5 includes a second light source 53. The height and angle adjustment process of the second light source 45 is the same as that of Example 1. By adjusting the height and angle of the light source 13 and the second light source 53, a hyperbolic rainbow is formed or the rainbow rings formed by the two light sources intersect in space, forming an "∞" - shaped or "x" - shaped intersecting rainbow (as Figure 7 shown).

[0070] The above is only the best implementation mode of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several deformations or equivalent replacements can be made to the technical solution of the present invention, and the same technical effects can also be achieved, which should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A device for forming a circular rainbow on the ground using water mist, characterized in that: include: A light source assembly (1) comprises a light source lifting bracket (11) capable of adjusting the height and a light source (13), wherein the light source (13) is mounted on the light source lifting bracket (11) via a universal joint (12); The spray assembly (2) comprises a spray lifting bracket (21) capable of adjusting the height, a crossbar (22) being mounted on the spray lifting bracket (21), an arc-shaped pipe (23) connected to a pressurized water supply device being mounted below the crossbar (22), and high-pressure nozzles (24) being evenly distributed below the arc-shaped pipe (23) so as to spray water mist to form an evenly distributed spray area; The lifting platform (3) is located between the light source assembly (1) and the spray area and is used to place a shooting device so that the lens of the shooting device is at the same height as the light source (13), and the angle θ between the lens sight line and the incident light of the light source is 40 to 42 degrees.

2. The device for forming a circular rainbow on the ground by using water mist according to claim 1, characterized in that: It also includes a base (4), the surface of the base (4) is provided with a slide rail (41), the slide rail (41) is located between the spray area and the light source assembly (1), and the lifting platform (3) is installed on the slide rail (41) and can move along the slide rail (41).

3. The device for forming a circular rainbow on the ground by using water mist according to claim 2, characterized in that: Self-locking moving wheels are installed below the base (4).

4. The device for forming a circular rainbow on the ground by using water mist according to claim 3, characterized in that: The light source (13) is a white light source, the power of the light source is ≥500 lumens, and the color temperature is 5000-6500K.

5. The device for forming a circular rainbow on the ground by using water mist according to claim 4, characterized in that: The light source (13) is adjusted to a pitch angle of 0 to 90 degrees through the first universal joint (12).

6. The device for forming a circular rainbow on the ground by using water mist according to claim 5, characterized in that: The aperture of the high pressure nozzle (24) is 0.2-0.5 mm, the particle size of the sprayed water mist is 200-500 μm, and the water mist density is 10 6 ~5×10 6 Drops / m 3 .

7. A method for forming a circular rainbow on the ground using a water mist device, characterized in that: The device according to claim 6 comprises the following steps: S1. According to the scene requirements, the device is set in the shooting area, and the spray area is located in front of the shooting area; S2, adjusting the spray area height h2, the light source height h1 and the light source pitch angle α according to the rainbow radius R to be formed; S3, adjust the height of the lifting platform so that the lens of the shooting device is at the same height as the light source, and the angle θ∈[40°,42°] between the lens sight line and the incident light of the light source; S4, optimize the spray pressure so that the droplet size d satisfies d∈[200μm,500μm]; S5. Turn on the light source and the pressurized water supply device. The light emitted by the light source is refracted-reflected-refracted by the fog droplets to form a circular rainbow.

8. The method for forming a circular rainbow on the ground using a water mist device according to claim 7, characterized in that: Step S2 is specifically as follows: S21, according to the radius R of the rainbow to be formed, set the light source height h1 and make h1 ≥ R, the spray area height h2 and make h2 ≥ h1 + R, and the horizontal distance L1 from the light source to the spray area; S22, adjusting the elevation angle of the light source according to the incident angle of the light source; S23, according to the formula The horizontal distance between the lifting platform and the spray area is calculated, and the position of the lifting platform is adjusted accordingly, where θ is the optimal observation angle, θ∈[40°,42°].

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