CN114355712A - Cloud projection system - Google Patents

Abstract

The invention provides a cloud projection system, comprising: a light emitting assembly for emitting a light beam; the pattern modulation component is used for modulating the light beam into preset pattern light; the light guide component is used for guiding the preset pattern light to a remote carrier for imaging; the pattern modulation assembly is disposed in an optical path between the light emitting assembly and the light directing assembly; the pattern modulation component comprises a first pattern modulator and a second pattern modulator, the first pattern modulator is arranged on an angle distribution surface of the light path, the second pattern modulator is arranged on a surface distribution surface of the light path, and the surface distribution surface is arranged at the downstream of the light path. The cloud projection system can present the transmission light beam with uniform brightness and the shape consistent with the final pattern.

Description

Cloud projection system

technical field

The invention relates to the field of projection, in particular to a cloud projection system.

Background technique

With the continuous development of projection technology, people have begun to have more interpretations of projection, and gradually penetrated from close-up projection such as projection TV and projection movies to long-distance projection. Compared with the gradual maturity of near-distance projection technology, long-distance projection still has more challenges.

Remote projection is currently mainly used to present images in the cloud for advertising, publicity, performance and other purposes. Cloud imaging includes the cloud image and the transmission beam formed from the light point of the ground projector to the cloud imaging point. At present, the transmission beam formed by the long-distance beam propagation has some problems such as blurring of some light segments, uneven brightness of the beam, and a large difference between the shape of the beam and the final image.

SUMMARY OF THE INVENTION

The technical problems to be solved by the present invention are: some optical segments existing in the transmission beam in cloud imaging are blurred, the brightness of the beam is not uniform, and the shape of the beam differs greatly from the final imaging.

In order to solve the above-mentioned technical problems, the present invention provides a cloud projection system, including:

Light-emitting components for outgoing light beams;

a pattern modulation component for modulating the light beam into a preset pattern light;

a light guide assembly for guiding the preset pattern light to a distal carrier for imaging;

the pattern modulation assembly is disposed in the light path between the light emitting assembly and the light guide assembly;

Wherein, the pattern modulation component includes a first pattern modulator and a second pattern modulator, the first pattern modulator is arranged on the angular distribution surface of the optical path, and the second pattern modulator is arranged on the angular distribution surface of the optical path A surface distribution surface, the surface distribution surface is downstream of the optical path.

In one embodiment, it further includes a first lens assembly and a second lens assembly, the first lens assembly is disposed between the light emitting assembly and the first pattern modulator, and the second lens assembly is disposed in the between the first pattern modulator and the second pattern modulator.

In one embodiment, the first pattern modulator and the second pattern modulator are reflective plates with hollow patterns, and the light beams passing through the reflective plates through the hollows form preset pattern lights.

In one embodiment, the first pattern modulator and the second pattern modulator are a coating plate, the coating plate includes a first coating area and a second coating area, and the first coating area is a preset pattern The second coating area is a coating area other than the first coating area on the coating plate, and the first coating area and the second coating area have different transflective characteristics to the incident light beam.

In one embodiment, the light source assembly includes:

Laser light source for generating excitation light;

The wavelength conversion device is used for receiving the excitation light and generating the corresponding received laser light, and the received laser light is guided and incident into the pattern modulation component.

In one embodiment, the light source assembly further includes a dichroic mirror disposed in the excitation light path and the received laser light path;

The dichroic mirror is used to reflect the excitation light and transmit the received laser light, and the transmitted received laser light is incident on the pattern modulation component.

In one embodiment, the first pattern modulator is disposed in the excitation light path and the received laser light path, and is used to reflect the excitation light and transmit the received laser light, and the transmitted received laser light is incident to the pattern modulation component.

In one embodiment, the light source assembly emits broad-spectrum light, and the broad-spectrum light includes first-wavelength light and second-wavelength light;

The first coating region transmits the light of the first wavelength band, and the second coating region transmits the light of the second wavelength band; or the first coating region transmits the light of the second wavelength band, and the second coating region transmits the light of the first wavelength band;

The transmitted first wavelength band light and the second wavelength band light form the preset pattern light.

In one embodiment, the remote carrier is any one of cloud layer, water mist, water curtain, flying object surface and fireworks smoke.

In one embodiment, the light guide assembly is a projection lens.

Compared with the prior art, the cloud projection system of the present invention modulates the light beam twice through the two pattern modulators arranged in the optical path, and the preset pattern emitted by the second pattern modulator located on the surface distribution surface is presented. The imaging end of the cloud carrier with surface distribution is imaged, and the preset pattern emitted by the first pattern modulator on the angular distribution surface is imaged at the front end of the transmission beam with angular distribution, and the beam shape at the front end of the transmission beam is corrected within a certain transmission distance, so that the transmission The first half of the beam and the second half of the beam are shaped to present a transmission beam with uniform brightness and the same shape as the final pattern.

Description of drawings

In order to make the content of the present invention clearer, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are not relevant to ordinary skills in the field. As far as personnel are concerned, on the premise of no creative work, other drawings can also be obtained from these drawings, among which:

FIG. 1 is a schematic structural diagram of Embodiment 1 of the cloud projection system of the present invention.

FIG. 2 is a schematic diagram of the transmission beam of the present invention.

FIG. 3 is a schematic structural diagram of Embodiment 2 of the cloud projection system of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

Referring to FIG. 1, this embodiment provides a cloud projection system 100. From left to right, the cloud projection system 100 includes a light emitting component 101, a pattern modulation component (103, 104) and a light guide component 104 arranged in sequence. in,

The light-emitting component 101 is used to emit light beams; the pattern modulation components (103, 104) are used to modulate the light beams into preset pattern light; the light guide component 104 is used to guide the preset pattern light to the remote carrier (not shown) imaging; the pattern modulation components ( 103 , 104 ) are arranged in the light path between the light emitting component 101 and the light guide component 102 . The light path between the light emitting component 101 and the light guide component 102 includes an angular distribution surface 1 and a surface distribution surface 2 for propagating light beams.

Wherein, the pattern modulation component (103, 104) includes a first pattern modulator 103 and a second pattern modulator 104, the first pattern modulator 103 is arranged on the angular distribution surface 1 of the optical path, the second pattern modulator 103 The pattern modulator is arranged on the surface distribution surface 2 of the optical path, and the surface distribution surface 2 is downstream of the optical path.

It should be noted that a beam shaping device is included between the angular distribution surface and the surface distribution surface for converting the light beam from the angular distribution to the surface distribution. The light beam is shaped by the first pattern modulator 103 and the second pattern modulator 104 respectively, and the lights emitted from the first pattern modulator 103 and the second pattern modulator 104 are all preset pattern lights.

The preset pattern light emitted from the light guide member 102 is imaged on the far-end carrier through long-distance transmission, and a transmission beam will be formed in the imaging path, as shown in FIG. 2 . Wherein, the remote carrier is any one of cloud layer, water mist, water curtain, flying object surface and fireworks smoke. The light guide assembly 102 is a projection lens.

Continuing to refer to Figure 2, the transmission beam is long enough, and the beam is converted from angular distribution to surface distribution during the long enough transmission process. Finally, the imaging end of the cloud carrier will show a surface distribution, and the front end of the transmission beam will show an angular distribution. The preset pattern emitted by the second pattern modulator on the surface distribution surface 2 is imaged on the imaging end of the cloud carrier that presents the surface distribution, and the preset pattern emitted by the first pattern modulator on the angular distribution surface 1 is displayed on the transmission beam showing the angular distribution. The front end is imaged, and the beam shape at the front end of the transmission beam is corrected within a certain transmission distance. It can be seen that in this embodiment, the first pattern modulator 103 and the second pattern modulator 104 at specific positions are used to modulate the beam twice, so that the first half beam and the second half beam of the transmission beam can be shaped respectively. , so that the longer-distance transmission light column has a better display effect.

Embodiment 2

Referring to FIG. 3 , this embodiment provides a cloud projection system 200 , which includes a light-emitting component, a pattern modulation component ( 205 , 207 ) and a light guide component 209 arranged in sequence, and further includes a first lens component 203 and a second lens component 203 . A lens assembly 206, the first lens assembly 203 is arranged between the light emitting assembly and the first pattern modulator 205, and the second lens assembly 206 is arranged between the first pattern modulator 205 and the first pattern modulator 205. between the two pattern modulators 207 .

Both the first lens assembly 203 and the second lens assembly 206 are used to convert the angular distribution and the surface distribution of the incident light beam.

The light-emitting assembly of this embodiment includes a laser light source 201 for emitting laser light and a wavelength conversion device 202 for receiving the excitation light and generating the corresponding received laser light, and arranged in the excitation light optical path and the received laser light path The dichroic mirror 204. The laser light emitted by the laser light source 201 is incident on the dichroic mirror 204, and the dichroic mirror 204 guides the laser light to the wavelength conversion device 202 by means of reflection, and excites the wavelength conversion material on the wavelength conversion device 202. The excited wavelength conversion material Exit by laser. The received laser light emitted from the wavelength conversion device 202 exhibits a surface distribution.

The received laser light with surface distribution is incident on the first lens component 203, the first lens component 203 will focus the received laser light into a collimated light and convert the light beam into an angularly distributed light beam, and the angularly distributed collimated light beam is incident on the dichroic mirror 204, The dichroic mirror 204 transmits the received laser light and makes it incident on the first pattern modulator 205 . The first pattern modulator 205 is located at the position of the angular distribution surface through the first lens assembly 203, and the first pattern modulator 205 performs light modulation on the angularly distributed light beam. Similarly, the second lens assembly 206 condenses the pattern light emitted by the first pattern modulator 205, and converts the angularly distributed light beam into a surface distribution, so that the second pattern modulator 207 is at the position of the surface distribution surface, and the second pattern modulator 207 Light modulation is performed on the light beams distributed on the surface.

Further, the laser light source 201 emits blue laser light, and the wavelength conversion device 202 is excited to emit broad-spectrum light, such as yellow light. The dichroic mirror 204 reflects blue laser light and transmits yellow light. In another embodiment, the dichroic mirror can also transmit blue laser light and reflect yellow light. It should be noted that the light emitting components can emit light beams of various colors as required, and the dichroic mirror 204 can be selected according to the corresponding transflective characteristics.

In one embodiment, the first pattern modulator 205 and the second pattern modulator 207 are reflective plates with hollow patterns, and the light beams passing through the reflective plates through the hollows form preset pattern lights. The light beam reflected from the reflective plate can be recovered by the optical path and then incident on the pattern modulation component for modulation, so as to improve the light utilization rate.

In another embodiment, the first pattern modulator 205 and the second pattern modulator 207 are a coating plate, and the coating plate includes a first coating region and a second coating region, and the first coating region is According to the preset pattern shape, the second coating area is a coating area other than the first coating area on the coating plate. The first coating area can transmit incident light to form a predetermined pattern of light, and the corresponding second coating area reflects the incident light. Similarly, the reflected light beam can be re-incident to the pattern modulation component through the optical path for modulation, so as to improve the light utilization rate.

Further, when the incident light is broad-spectrum light including light of the first wavelength band and light of the second wavelength band, the first coating region can transmit the light of the first wavelength band and reflect the light of the second wavelength band, and correspondingly, the second coating region can reflect the light of the second wavelength band. One wavelength band light transmits the second wavelength band light; or the first coating region transmits the second wavelength band light and reflects the first wavelength band light, correspondingly, the second coating region transmits the first wavelength band light and reflects the second wavelength band light. The pattern thus formed consists of two parts, wherein the first coating area with a predetermined pattern shape emits the pattern, and the second coating area emits the background color around the pattern.

In one embodiment, the first pattern modulator 205 is a coated plate, and the second pattern modulator 207 is a reflective plate with a hollow pattern. Alternatively, the first pattern modulator 205 is a reflective plate with a hollow pattern, and the second pattern modulator 207 is a coated plate.

When the first pattern modulator 205 is a coated plate, the coated plate can be arranged in the laser light path and the laser light path to guide the excitation light and the laser light through the coating characteristics, instead of the dichroic mirror, that is, the first pattern The modulator takes both the role of beam modulation and beam guidance to simplify the optical path. Specifically, the first pattern modulator is disposed in the excitation light path and the received laser light path, and is configured to reflect the excitation light and transmit the received laser light, and the transmitted received laser light is incident on the pattern The modulation component either transmits the excitation light and reflects the received laser light, and the reflected received laser light is incident on the pattern modulation component.

The above embodiments are only examples to clearly illustrate the present invention, and are not intended to limit the embodiments; the scope of the present invention includes but is not limited to the above embodiments, and all equivalent changes made according to the shape and structure of the present invention are included in the present invention within the scope of protection.

Claims (10)

1. a cloud projection system, is characterized in that, comprises: Light-emitting components for outgoing light beams; a pattern modulation component for modulating the light beam into a preset pattern light; a light guide assembly for guiding the preset pattern light to a distal carrier for imaging; the pattern modulation assembly is disposed in the light path between the light emitting assembly and the light guide assembly; Wherein, the pattern modulation component includes a first pattern modulator and a second pattern modulator, the first pattern modulator is arranged on the angular distribution surface of the optical path, and the second pattern modulator is arranged on the angular distribution surface of the optical path A surface distribution surface, the surface distribution surface is downstream of the optical path. 2. The cloud projection system according to claim 1, further comprising a first lens assembly and a second lens assembly, wherein the first lens assembly is provided between the light-emitting assembly and the first pattern modulator. and the second lens assembly is disposed between the first pattern modulator and the second pattern modulator. 3 . The cloud projection system according to claim 1 or 2 , wherein the first pattern modulator and the second pattern modulator are reflective plates with hollow patterns, and the reflective plates pass through the hollow pattern. 4 . The beam forms a preset pattern of light. 4. The cloud projection system according to claim 1 or 2, wherein the first pattern modulator and the second pattern modulator are coated plates, and the coated plate comprises a first coating area and a second Coating area, the first coating area is a preset pattern shape, the second coating area is a coating area other than the first coating area on the coating plate, the first coating area and the second coating area are paired The incident light beams have different transflective properties. 5. The cloud projection system according to claims 1-4, wherein the light source assembly comprises: Laser light source for generating excitation light; The wavelength conversion device is used for receiving the excitation light and generating the corresponding received laser light, and the received laser light is guided and incident into the pattern modulation component. 6. The cloud projection system according to claim 5, wherein the light source assembly further comprises a dichroic mirror arranged in the excitation light path and the laser light path; The dichroic mirror is used to reflect the excitation light and transmit the received laser light, and the transmitted received laser light is incident on the pattern modulation component. 7 . The cloud projection system according to claim 5 , wherein the first pattern modulator is disposed in the excitation light path and the received laser light path, and is used for reflecting the excitation light and transmitting the The transmitted laser light is incident on the pattern modulation component. 8 . The cloud projection system according to claim 4 , wherein the light source assembly emits broad-spectrum light, and the broad-spectrum light comprises first-wavelength light and second-wavelength light; 8 . The first coating region transmits the light of the first wavelength band, and the second coating region transmits the light of the second wavelength band; or the first coating region transmits the light of the second wavelength band, and the second coating region transmits the light of the first wavelength band; The transmitted first wavelength band light and the second wavelength band light form the preset pattern light. 9 . The cloud projection system according to claim 1 , wherein the remote carrier is any one of cloud layer, water mist, water curtain, flying object surface and fireworks smoke. 10 . 10 . The cloud projection system according to claim 1 , wherein the light guide component is a projection lens. 11 .

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