Cloud projection system
By setting up two pattern modulators in the optical path of the cloud projection system, the beam of the transmission light column is patterned twice, which solves the problems of uneven beam brightness and difference in the shape of the light column in cloud imaging, and achieves better beam shaping and imaging effects.
Patent Information
- Application Number
- CN202011093138.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-10-13
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2040-10-13
AI Technical Summary
In cloud imaging, the transmission light column has problems such as partial light segment blur, uneven beam brightness, and large differences in the shape of the light column from the final imaging.
By setting two pattern modulators in the optical path, the light beam is patterned twice. The first pattern modulator is located at the angular distribution surface and the second pattern modulator is located at the surface distribution surface, respectively shaping the first and second half of the beams of the transmission light column.
The beam shaping of the first and second half of the transmission light column is realized, so that the transmission light column has a better surface distribution shape at the imaging end of the cloud carrier, improving the beam brightness uniformity and the accuracy of the beam shape.
Smart Images
Figure CN114355712B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of projection, and in particular to a cloud projection system. Background Art
[0002] With the continuous development of projection technology, people have begun to have more understandings of projection, gradually penetrating from short-distance projection such as projection TV and projection movie to long-distance projection. Compared with the gradual maturity of short-distance projection technology, long-distance projection still has more challenges.
[0003] Long-distance projection is currently mainly used to present images in the cloud for advertising, publicity, performance and other purposes. Cloud imaging includes cloud images and the transmission light column formed from the light output point of the ground projector to the cloud imaging point. At present, the transmission light column formed by long-distance light beam propagation has some problems such as partial light segment blurring, uneven light beam brightness, and large differences between the shape of the light column and the final image. Summary of the invention
[0004] The technical problems to be solved by the present invention are: the partial blurring of light segments in the transmitted light column in cloud imaging, the uneven brightness of the light beam, and the large difference between the shape of the light column and the final imaging.
[0005] In order to solve the above technical problems, the present invention provides a cloud projection system, comprising:
[0006] A light emitting component, used for emitting a light beam;
[0007] A pattern modulation component, used for modulating the light beam into a preset pattern light;
[0008] A light guiding component, used for guiding the preset pattern light to a remote carrier for imaging;
[0009] The pattern modulation component is arranged in the light path between the light emitting component and the guiding component;
[0010] 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, the second pattern modulator is arranged on the surface distribution surface of the optical path, and the surface distribution surface is downstream of the optical path.
[0011] In one embodiment, a first lens assembly and a second lens assembly are further included, wherein the first lens assembly is disposed between the light source and the first pattern modulator, and the second lens assembly is disposed between the first pattern modulator and the second pattern modulator.
[0012] 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 hollow patterns form preset pattern lights.
[0013] In one embodiment, the first pattern modulator and the second pattern modulator are coated plates, the coated plates include a first coated area and a second coated area, the first coated area is a preset pattern shape, the second coated area is a coated area outside the first coated area on the coated plate, and the first coated area and the second coated area have different transmission and reflection characteristics to an incident light beam.
[0014] In one embodiment, the light source assembly comprises:
[0015] A laser light source, used to generate excitation light;
[0016] The wavelength conversion device is used to receive the excitation light and generate corresponding converted light, and the converted light is guided to be incident on the pattern modulation component.
[0017] In one embodiment, the light source assembly further comprises a dichroic mirror disposed in the excitation light path and the stimulation light path;
[0018] The dichroic mirror is used for reflecting the excitation light and transmitting the converted light, and the transmitted converted light is incident on the pattern modulation component.
[0019] In one embodiment, the first pattern modulator is disposed in the excitation light path and the conversion light path, and is used to reflect the excitation light and transmit the conversion light, and the transmitted conversion light is incident on the pattern modulation component.
[0020] In one embodiment, the light source assembly emits broad-spectrum light, the broad-spectrum light includes a first-band light and a second-band light, the first coating area transmits the first-band light, and the second coating area transmits the second-band light;
[0021] Or the first coating area transmits the second wavelength band light or the second coating area transmits the first wavelength band light, and the transmitted first wavelength band light and the second wavelength band light form the preset pattern light.
[0022] In one embodiment, the remote carrier is any one of clouds, water mist, water curtain, the surface of a flying object and smoke from fireworks.
[0023] In one embodiment, the light directing assembly is a projection lens.
[0024] Compared with the prior art, the cloud projection system of the present invention performs two pattern modulators on the light beam through two pattern modulators arranged in the optical path, and the preset pattern emitted by the second pattern modulator on the surface distribution surface is imaged at the imaging end of the cloud carrier presenting the surface distribution, and the preset pattern emitted by the first pattern modulator on the angular distribution surface is imaged at the front end of the transmission light column presenting the angular distribution, and the light beam shape at the front end of the transmission light column is corrected within a certain transmission distance, so that the front half light beam and the rear half light beam of the transmission light column are both shaped, and the transmission light beam has a better presentation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to make the content of the present invention clearer, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0026] Figure 1 It is a structural schematic diagram of implementation mode 1 of the cloud projection system of the present invention.
[0027] Figure 2 Schematic diagram of the transmission light column of the present invention.
[0028] Figure 3 It is a structural schematic diagram of implementation mode 2 of the cloud projection system of the present invention. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] Embodiment 1
[0031] Please refer to Figure 1 As shown, 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 guiding component 104 arranged in sequence, wherein:
[0032] The light emitting component 101 is used for emitting a light beam; the pattern modulation component (103, 104) is used for modulating the light beam into a preset pattern light; the light guiding component 102 is used for guiding the preset pattern light to a remote carrier (not shown) for imaging; the pattern modulation component (103, 104) is arranged in the light path between the light emitting component 101 and the light guiding component 102. The light path between the light emitting component 101 and the light guiding component 102 includes an angular distribution surface 1 and a surface distribution surface 2 for propagating the light beam.
[0033] The pattern modulation component (103, 104) comprises a first pattern modulator 103 and a second pattern modulator 104, wherein the first pattern modulator 103 is arranged on an angular distribution surface 1 of the optical path, and the second pattern modulator is arranged on a surface distribution surface 2 of the optical path, and the surface distribution surface 2 is downstream of the optical path.
[0034] It should be noted that a beam shaping device is included between the angular distribution surface and the surface distribution surface, which is used to convert the light beam from angular distribution to surface distribution. The light beam is beam shaped by the first pattern modulator 103 and the second pattern modulator 104 respectively, and the light emitted from the first pattern modulator 103 and the second pattern modulator 104 are both preset pattern lights.
[0035] The preset pattern light emitted from the light guiding component 102 is imaged on the remote carrier after long-distance transmission, and a transmission light column is formed in the imaging path, such as Figure 2 As shown. Wherein, the remote carrier is any one of clouds, water mist, water curtain, flying object surface and smoke from fireworks. The light guide component 102 is a projection lens.
[0036] Continue to refer Figure 2 , the transmission light column is long enough, and the light beam undergoes the conversion of angular distribution and surface distribution during the sufficiently long transmission process, and finally presents surface distribution at the imaging end of the cloud carrier, and presents angular distribution at the front end of the transmission light column. The preset pattern emitted by the second pattern modulator on the surface distribution surface 2 is imaged at the imaging end of the cloud carrier presenting the surface distribution, and the preset pattern emitted by the first pattern modulator on the angular distribution surface 1 is imaged at the front end of the transmission light column presenting the angular distribution, and the shape of the light beam at the front end of the transmission light column is corrected within a certain transmission distance. It can be seen that this embodiment performs two pattern modulations on the light beam by the first pattern modulator 103 and the second pattern modulator 104 at specific positions, and can respectively realize the shaping of the first half of the light beam and the second half of the light beam of the transmission light column, so that the transmission light column with a longer distance has a better display effect.
[0037] Embodiment 2
[0038] Please refer to Figure 3As shown, this embodiment provides a cloud projection system 200, including a light-emitting component, a pattern modulation component (205, 207) and a light guiding component 209 arranged in sequence, and also including a first lens component 203 and a second lens component 206, wherein the first lens component 203 is arranged between the light-emitting component and the first pattern modulator 205, and the second lens component 206 is arranged between the first pattern modulator 205 and the second pattern modulator 207.
[0039] The first lens assembly 203 and the second lens assembly 206 are both used to convert the angular distribution and the surface distribution of the incident light beam.
[0040] The light-emitting assembly of this embodiment includes a laser light source 201 for emitting laser light, a wavelength conversion device 202 for receiving the excitation light and generating corresponding stimulated light, and a dichroic mirror 204 disposed in the excitation light path and the stimulated light path. The laser light emitted by the laser light source 201 is incident on the dichroic mirror 204, which guides the laser light to the wavelength conversion device 202 by reflection, and excites the wavelength conversion material on the wavelength conversion device 202, and the excited wavelength conversion material emits stimulated light. The stimulated light emitted from the wavelength conversion device 202 presents a surface distribution.
[0041] The converted light presenting a surface distribution is incident on the first lens assembly 203. The first lens assembly 203 converges the converted light into collimated light and converts the light beam into an angularly distributed light beam. The angularly distributed collimated light beam is incident on the dichroic mirror 204. The dichroic mirror 204 transmits the converted light beam and makes it incident on the first pattern modulator 205. The first lens assembly 203 makes the first pattern modulator 205 be in an angularly distributed surface position, and the first pattern modulator 205 performs optical modulation on the angularly distributed light beam. Similarly, the second lens assembly 206 converges 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 in a surface distribution surface position, and the second pattern modulator 207 performs optical modulation on the surface distributed light beam.
[0042] Furthermore, the laser light source 201 emits a blue laser, and the wavelength conversion device 202 is stimulated to emit a broad spectrum light, such as yellow light. The dichroic mirror 204 reflects the blue laser and transmits the yellow light. In another embodiment, the dichroic mirror can also transmit the blue laser and reflect the yellow light. It should be noted that the light emitting component can emit light beams of various colors as needed, and the dichroic mirror 204 can select the corresponding transmission and reflection characteristics as needed.
[0043] 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 hollow patterns form preset pattern lights. The light beams reflected from the reflective plates can be recycled through the optical path and incident on the pattern modulation components again for modulation to improve light utilization.
[0044] In another embodiment, the first pattern modulator 205 and the second pattern modulator 207 are coated plates, the coated plates include a first coated area and a second coated area, the first coated area is a preset pattern shape, and the second coated area is a coated area other than the first coated area on the coated plate. The first coated area can transmit incident light to form a preset pattern light, and the corresponding second coated area reflects the incident light. Similarly, the reflected light beam can be recycled through the optical path and incident on the pattern modulation component again for modulation to improve light utilization.
[0045] Furthermore, when the incident light is a wide-spectrum light including the first wavelength band light and the second wavelength band light, the first coating area can transmit the first wavelength band light and reflect the second wavelength band light, and correspondingly, the second coating area reflects the first wavelength band light and transmits the second wavelength band light; or the first coating area transmits the second wavelength band light and reflects the first wavelength band light, and correspondingly, the second coating area 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 having a preset pattern shape emits a pattern, and the second coating area emits a background color around the pattern.
[0046] In one embodiment, the first pattern modulator 205 is a film-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 film-coated plate.
[0047] When the first pattern modulator 205 is a coating plate, the coating plate can be arranged in the laser light path and the converted light light path to guide the excitation light and the converted light through the coating characteristics, replacing the dichroic mirror, that is, the first pattern modulator takes into account the functions of beam modulation and beam guidance to simplify the optical path. Specifically, the first pattern modulator is arranged in the excitation light path and the converted light path, and is used to reflect the excitation light and transmit the converted light, and the transmitted converted light is incident on the pattern modulation component, or transmit the excitation light and reflect the converted light, and the reflected converted light is incident on the pattern modulation component.
[0048] The above embodiments are only examples for clearly explaining the present invention and are not intended to limit the implementation methods. The scope of the present invention includes but is not limited to the above embodiments, and any equivalent changes made to the shape and structure of the present invention are included in the protection scope of the present invention.
Claims
1. A cloud projection system, characterized in that: include: A light-emitting component, the light-emitting component comprising a laser light source, a wavelength conversion device and a dichroic mirror, the laser light source is used to generate excitation light, the wavelength conversion device is used to receive the excitation light and generate corresponding converted light, the dichroic mirror is arranged in the excitation light path and the converted light path, the dichroic mirror is used to reflect the excitation light and transmit the converted light; A pattern modulation component, used for modulating the light beam emitted by the light emitting component into a preset pattern light, the pattern modulation component comprising a first pattern modulator and a second pattern modulator; A light guiding component, used for guiding the preset pattern light to a remote carrier for imaging, wherein the pattern modulation component is arranged in the light path between the light emitting component and the light guiding component; a first lens assembly disposed between the wavelength conversion device and the dichroic mirror; a second lens assembly, disposed between the first pattern modulator and the second pattern modulator, wherein the first pattern modulator is located on an optical path of the converted light transmitted by the dichroic mirror; The excitation light is incident on the dichroic mirror and reflected by the dichroic mirror to the wavelength conversion device, the wavelength conversion device emits the converted light, the converted light presenting a surface distribution is converged and collimated by the first lens component and converted into an angularly distributed light beam before being incident on the dichroic mirror, the converted light is transmitted through the dichroic mirror and then incident on the first pattern modulator, and then modulated by the first pattern modulator and then incident on the second lens component, and then converged and converted into a surface-distributed light beam by the second lens component and then incident on the second pattern modulator.
2. The cloud projection system according to claim 1, characterized in that: 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 hollow patterns form preset pattern lights.
3. The cloud projection system according to claim 1, characterized in that: The first pattern modulator and the second pattern modulator are coated plates, the coated plates include a first coated area and a second coated area, the first coated area is a preset pattern shape, the second coated area is a coated area outside the first coated area on the coated plate, and the first coated area and the second coated area have different transmission and reflection characteristics to the incident light beam.
4. The cloud projection system according to claim 1, characterized in that: The first pattern modulator is disposed in the excitation light path and the converted light path, and is used for reflecting the excitation light and transmitting the converted light, and the transmitted converted light is incident on the pattern modulation component.
5. The cloud projection system according to claim 3, characterized in that: The light emitting component emits broad-spectrum light, and the broad-spectrum light includes light of a first wavelength band and light of a second wavelength band; The first coating area transmits light of the first wavelength band, and the second coating area transmits light of the second wavelength band; or the first coating area transmits light of the second wavelength band, and the second coating area transmits light of the first wavelength band; The transmitted light in the first wavelength band and the light in the second wavelength band form the preset pattern light.
6. The cloud projection system according to claim 1, characterized in that: The remote carrier is any one of clouds, water mist, water curtain, flying object surface and firework smoke.
7. The cloud projection system according to claim 1, characterized in that: The light guiding component is a projection lens.
Citation Information
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