CN117706795A - Beam combining structure and laser display device - Google Patents
Beam combining structure and laser display device Download PDFInfo
- Publication number
- CN117706795A CN117706795A CN202311839910.4A CN202311839910A CN117706795A CN 117706795 A CN117706795 A CN 117706795A CN 202311839910 A CN202311839910 A CN 202311839910A CN 117706795 A CN117706795 A CN 117706795A
- Authority
- CN
- China
- Prior art keywords
- light
- holographic grating
- volume holographic
- wavelength
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 44
- 239000000178 monomer Substances 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 238000005286 illumination Methods 0.000 claims description 8
- 230000001427 coherent effect Effects 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 5
- 239000012986 chain transfer agent Substances 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- 108010010803 Gelatin Proteins 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 229920000159 gelatin Polymers 0.000 claims description 3
- 239000008273 gelatin Substances 0.000 claims description 3
- 235000019322 gelatine Nutrition 0.000 claims description 3
- 235000011852 gelatine desserts Nutrition 0.000 claims description 3
- 238000007699 photoisomerization reaction Methods 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- -1 silver halide Chemical class 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002165 photosensitisation Effects 0.000 description 3
- 239000003504 photosensitizing agent Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1086—Beam splitting or combining systems operating by diffraction only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/32—Holograms used as optical elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Holo Graphy (AREA)
Abstract
The embodiment of the invention discloses a beam combining structure and a laser display device, which comprise a first light source, a second light source, a third light source, a first volume holographic grating and a second volume holographic grating; the first light source, the first volume holographic grating and the second volume holographic grating are arranged along a first direction, and the second light source, the first volume holographic grating, the third light source and the second volume holographic grating are arranged along a second direction; the first light source emits first wavelength light along a first direction, and the first wavelength light is transmitted through the first volume holographic grating and the second volume holographic grating; the second light source emits second-wavelength light along a second direction, and the second-wavelength light is reflected by the first volume holographic grating and transmitted by the second volume holographic grating; the third light source emits third wavelength light along the second direction, and the third wavelength light is reflected by the second volume holographic grating and then is combined with the first wavelength light and the second wavelength light to form white light. The embodiment of the invention can realize beam combination with low cost and is used for laser display.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to a beam combining structure and a laser display device.
Background
In the laser display technology, light beams emitted by a three-primary-color laser light source or a combined light source (laser+LED) are required to be combined to form white light, and then the white light is collimated or expanded to enter a light machine, and an image formed after modulation by a light modulation device is projected on a screen.
In the prior art, a method of color separation and beam combination is generally adopted in the beam combination process, a dichroic mirror is adopted, namely a high-reflection film with one wavelength and a high-transmission film with other wavelengths are plated on an optical glass substrate, and reflection and transmission of light rays with different wavelengths are utilized to form a combined beam. The prior art has the defects of high device cost, smaller device size and the like.
Disclosure of Invention
The embodiment of the invention provides a beam combination structure and a laser display device, wherein the beam combination structure reduces cost, has simple preparation flow and can be used for the laser display device.
According to an aspect of the present invention, there is provided a beam combining structure for use in a laser display device, the beam combining structure including a first light source, a second light source, a third light source, a first volume hologram grating, and a second volume hologram grating;
the first light source, the first volume holographic grating and the second volume holographic grating are arranged along a first direction, the second light source and the first volume holographic grating are arranged along a second direction, the third light source and the second volume holographic grating are arranged along the second direction, and the first direction and the second direction are intersected;
the first light source emits first wavelength light along the first direction, and the first wavelength light is transmitted through the first volume holographic grating and the second volume holographic grating in sequence;
the second light source emits second wavelength light along the second direction, and the second wavelength light is reflected by the first volume holographic grating and transmitted by the second volume holographic grating in sequence;
and the third light source emits third wavelength light along the second direction, and the third wavelength light is combined with the first wavelength light and the second wavelength light to form white light after being reflected by the second volume holographic grating.
Optionally, the first volume holographic grating and the second volume holographic grating each comprise a holographic recording material;
and exposing the holographic recording material by using the same light beam in laser display to form the first volume holographic grating or the second volume holographic grating.
Optionally, performing interference exposure on the position of the holographic recording material by using two coherent light beams with the same wavelength and a preset included angle in the direction to form the first volume holographic grating or the second volume holographic grating;
the two coherent light beams comprise a reference light beam and an object light beam, when the first light beam is incident to the first volume holographic grating or the second volume holographic grating, a second light beam is output in a diffraction mode, the first light beam is identical to the reference light beam in direction and the same in wavelength, the second light beam is identical to the object light beam in direction and the same in wavelength, or the first light beam is identical to the object light beam in direction and the same in wavelength, and the second light beam is identical to the reference light beam in direction and the same in wavelength.
Optionally, the first wavelength light is red light, the second wavelength light is green light, and the third wavelength light is blue light.
Optionally, the first light source comprises a red light laser, the second light source comprises a green light laser, and the third light source comprises a blue light laser.
Optionally, the first light source comprises a red phosphor light source or a red light emitting diode, the second light source comprises a green laser, and the third light source comprises a blue laser.
Optionally, the holographic recording material comprises at least one of a photopolymer, a silver halide emulsion, a dichromated gelatin, a photodegradable polymer material, a photoconductive thermoplastic material, a photoisomerization material, a photorefractive material, and a super surface material.
Optionally, the holographic recording material comprises a photopolymer, wherein the photopolymer consists of a photosensitive dye, an initiator, a chain transfer agent, a monomer, a film-forming resin and a plasticizer, wherein the refractive index of the monomer is different from that of the film-forming resin, and the monomer is polymerized by utilizing illumination to generate diffusion due to concentration difference to form a phase-type holographic grating with refractive index modulation with the film-forming resin so as to realize holographic recording.
According to another aspect of the present invention, there is provided a laser display device, including the beam combining structure, the digital light processing module and the projection lens as described above, where the beam combining structure is used to emit an illumination beam, the illumination beam is modulated by the digital light processing module to form an image beam, and the image beam is amplified by the projection lens and then output.
Optionally, the device further comprises a screen, and the image beam output by the projection lens is transmitted or reflected by the screen and then is incident to eyes of a user.
According to the beam combining structure and the laser display device provided by the embodiment of the invention, the first wavelength light rays emitted by the first light source are transmitted along the first direction, the second wavelength light rays emitted by the second light source are reflected by the first volume holographic grating and then transmitted along the first direction, the third wavelength light rays emitted by the third light source are reflected by the second volume holographic grating and then transmitted along the first direction, the directions of the first wavelength light rays, the second wavelength light rays and the third wavelength light rays are the same, the positions of the first wavelength light rays, the second wavelength light rays and the third wavelength light rays are the same, and the beam combining forms white light to be transmitted along the first direction.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a beam combining structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a holographic recording material exposure process according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a laser display device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a beam combining structure according to an embodiment of the present invention, and referring to fig. 1, the beam combining structure includes a first light source 101, a second light source 102, a third light source 103, a first volume hologram grating 201, and a second volume hologram grating 202. Wherein the first light source 101, the first volume holographic grating 201 and the second volume holographic grating 202 are arranged along a first direction x, the second light source 102 and the first volume holographic grating 201 are arranged along a second direction y, the third light source 103 and the second volume holographic grating 202 are arranged along the second direction y, and the first direction x and the second direction y intersect; the first light source 101 emits first-wavelength light rays along a first direction x, and the first-wavelength light rays sequentially pass through the first volume holographic grating 201 and the second volume holographic grating 202 to be transmitted; the second light source 102 emits second-wavelength light rays along the second direction y, and the second-wavelength light rays are sequentially reflected by the first volume holographic grating 201 and transmitted by the second volume holographic grating 202; the third light source 103 emits light with a third wavelength along the second direction y, and the light with the third wavelength is reflected by the second volume hologram 202 and then combined with the light with the first wavelength and the light with the second wavelength to form white light.
Illustratively, the first light source 101 emits a first wavelength light, the first wavelength light is transmitted to the first volume holographic grating 201 along the first direction x, the second light source 102 emits a second wavelength light, the second wavelength light is transmitted to the first volume holographic grating 201 along the second direction y, the second wavelength light is reflected by the first volume holographic grating 201 and then transmitted along the first direction x, the first wavelength light and the second wavelength light form a combined beam, the combined beam is transmitted to the second volume holographic grating 202 along the first direction x, the third light source 103 emits a third wavelength light, the third wavelength light is transmitted to the second volume holographic grating 202 along the second direction, the third wavelength light is reflected by the second volume holographic grating 202 and then transmitted along the first direction x, the first wavelength light, the second wavelength light and the third wavelength light are identical in direction and position, and the combined beam forms white light and is transmitted along the first direction x.
In the beam combining structure provided by the embodiment of the invention, the first wavelength light emitted by the first light source 101 is transmitted along the first direction, the second wavelength light emitted by the second light source 102 is reflected by the first volume holographic grating 201 and then transmitted along the first direction, the third wavelength light emitted by the third light source 103 is reflected by the second volume holographic grating 202 and then transmitted along the first direction, the directions of the first wavelength light, the second wavelength light and the third wavelength light are the same, the positions are the same, and the beam combining is performed to form white light to be transmitted along the first direction.
The first wavelength light, the second wavelength light and the third wavelength light may be red, green and blue light, respectively, and the color and wavelength of the emitted light may be set according to practical requirements, which is not particularly limited in the embodiment of the present invention.
Illustratively, referring to FIG. 1, the first volume holographic grating 201 and the second volume holographic grating 202 each comprise holographic recording material; the hologram recording material is exposed by the same beam as in the laser display to form the first volume hologram 201 or the second volume hologram 202. Among them, a hologram recording material is a material for recording and reconstructing information in a hologram technology. The holographic technique is to record information in the form of holograms in a holographic material using the principle of interference of light, and recover all stored information in the form of diffraction imaging under the condition that the readout light satisfies diffraction matching. The characteristic of the holographic recording material is that the internal structure or composition changes correspondingly under the illumination with the difference of light intensity, thereby causing the change of refractive index and forming the modulation of refractive index. The holographic recording material may include at least one of a photopolymer, a silver halide emulsion, a dichromated gelatin, a photodegradable polymer material, a photoconductive thermoplastic material, a photoisomerization material, a photorefractive material, and a super surface material.
The light beam emitted by the light source is expanded to obtain parallel light with the same size as the holographic recording material, and the parallel light is split into two beams through polarization light splitting, wherein one beam of light directly irradiates the holographic recording material, and the other beam of light irradiates the holographic recording material after light intensity modulation. The two beams of light interfere at the position of the holographic recording material to form specific intensity distribution and expose the holographic recording material, and the refractive index of the holographic recording material changes under the change of the light intensity to form the first volume holographic grating 201 or the second volume holographic grating 202.
Illustratively, two coherent light beams with the same wavelength and a preset included angle in the direction are used for interference exposure at the position of the holographic recording material to form a first volume holographic grating 201 or a second volume holographic grating 202. The two coherent light beams include a reference light beam and an object light beam, when the first light beam is incident to the first volume holographic grating 201 or the second volume holographic grating 202, a second light beam is diffracted and output, the first light beam is identical to the reference light beam in direction and wavelength, the second light beam is identical to the object light beam in direction and wavelength, or the first light beam is identical to the object light beam in direction and wavelength, and the second light beam is identical to the reference light beam in direction and wavelength.
Illustratively, parameters such as a period, a shape, a size, etc. of the volume hologram grating may be set according to actual requirements, which is not limited by the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an exposure process of a holographic recording material according to an embodiment of the present invention, referring to fig. 2, after a beam emitted from a laser light source 30 is expanded at a beam expander 40, parallel light with the same size as the holographic recording material is obtained, and the parallel light is split into two beams after passing through a polarization splitting prism 50, wherein a reference beam is directly irradiated onto the holographic recording material, and an object beam is reflected by a first mirror 60 and a second mirror 70 and then irradiated onto the holographic recording material. The object beam and the reference beam interfere at the holographic recording material to form an interference fringe pattern and perform interference exposure on the holographic recording material. The refractive index of the holographic recording material changes under the change of the light intensity, and the first volume holographic grating 201 or the second volume holographic grating 202 is formed.
In a specific embodiment, optionally, the holographic recording material includes a photopolymer, the photopolymer is composed of a photosensitive dye, an initiator, a chain transfer agent, a monomer, a film-forming resin and a plasticizer, wherein the refractive index of the monomer is different from that of the film-forming resin, and the holographic recording is realized by using light to make the monomer diffuse due to concentration difference and form a phase-type holographic grating with refractive index modulated by the film-forming resin after polymerization.
Wherein the principle of the photopolymer is as follows: the photosensitizing dye determines the photosensitizing spectral range of the material that can transfer energy to the initiator upon absorption of photon energy. The initiator initiates polymerization of the monomer by cleavage or hydrogen abstraction reactions to form reactive species (radicals or anions). The chain transfer agent has the function of enabling the free radicals with large volume and low activity (including chain growth free radicals) to generate free radical transfer reaction, generating free radicals with small volume and high activity, and rapidly initiating the polymerization of the monomers. The monomer is the main component of the photopolymer, has unsaturated group or epoxy group, and is polymerized under the action of free radical or anion and cation. The film-forming resin mainly plays a role in forming and supporting and provides a certain mechanical stability for the material. The plasticizer has the function of weakening secondary valence bonds among polymer molecules and increasing the plasticity and flexibility of the polymer so as to facilitate the migration of the monomer. When exposed, the photosensitizing dye in the bright area of the interference fringes absorbs photons and activates the photoinitiator to generate active species through electron transfer or energy transfer, thereby initiating the polymerization reaction of the monomers. The monomer concentration of the dark area is hardly consumed along with the gradual reduction of the polymerization concentration of the monomer of the bright area, the monomer concentration difference of the light and dark area promotes the monomer of the dark area to start to migrate to the bright area, meanwhile, the substrate film-forming resin of the bright area is extruded to the dark area, the refractive index of the final bright area is close to that of the polymer, and the refractive index of the dark area is close to that of the film-forming resin, so that the phase type volume holographic grating with refractive index modulation is formed.
Illustratively, the first wavelength light is red light, the second wavelength light is green light, and the third wavelength light is blue light.
Illustratively, the first light source 101 comprises a red laser, the second light source 102 comprises a green laser, and the third light source 103 comprises a blue laser.
Illustratively, the first light source 101 comprises a red phosphor light source or a red light emitting diode, the second light source 102 comprises a green laser, and the third light source 103 comprises a blue laser.
Based on the same technical conception, the embodiment of the invention also provides laser display equipment. Fig. 3 is a schematic structural diagram of a laser display device according to an embodiment of the present invention, referring to fig. 3, a laser display device includes a beam combining structure 10, a digital light processing module 80 and a projection lens 90 according to any embodiment of the present invention, the beam combining structure 10 is configured to emit an illumination beam, the illumination beam is modulated by the digital light processing module 80 to form an image beam, and the image beam is amplified by the projection lens 90 and then output.
Illustratively, the laser display device further includes a screen 100, and the image beam output by the projection lens 90 is transmitted or reflected by the screen 100 and then is incident on the eyes of the user. Therefore, the laser display device provided by the embodiment of the present invention has the corresponding beneficial effects of the beam combining structure provided by the embodiment of the present invention, and will not be described herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. The beam combining structure is characterized by being used in a laser display device and comprises a first light source, a second light source, a third light source, a first volume holographic grating and a second volume holographic grating;
the first light source, the first volume holographic grating and the second volume holographic grating are arranged along a first direction, the second light source and the first volume holographic grating are arranged along a second direction, the third light source and the second volume holographic grating are arranged along the second direction, and the first direction and the second direction are intersected;
the first light source emits first wavelength light along the first direction, and the first wavelength light is transmitted through the first volume holographic grating and the second volume holographic grating in sequence;
the second light source emits second wavelength light along the second direction, and the second wavelength light is reflected by the first volume holographic grating and transmitted by the second volume holographic grating in sequence;
and the third light source emits third wavelength light along the second direction, and the third wavelength light is combined with the first wavelength light and the second wavelength light to form white light after being reflected by the second volume holographic grating.
2. The beam combining structure of claim 1, wherein the first volume holographic grating and the second volume holographic grating each comprise holographic recording material;
and exposing the holographic recording material by using the same light beam in laser display to form the first volume holographic grating or the second volume holographic grating.
3. The beam combining structure according to claim 2, wherein the first volume holographic grating or the second volume holographic grating is formed by performing interference exposure at the position of the holographic recording material by using two coherent light beams having the same wavelength and a predetermined angle in a direction;
the two coherent light beams comprise a reference light beam and an object light beam, when the first light beam is incident to the first volume holographic grating or the second volume holographic grating, a second light beam is output in a diffraction mode, the first light beam is identical to the reference light beam in direction and the same in wavelength, the second light beam is identical to the object light beam in direction and the same in wavelength, or the first light beam is identical to the object light beam in direction and the same in wavelength, and the second light beam is identical to the reference light beam in direction and the same in wavelength.
4. The beam combining structure of claim 1, wherein the first wavelength light is red light, the second wavelength light is green light, and the third wavelength light is blue light.
5. The beam combining structure of claim 4 wherein the first light source comprises a red light laser, the second light source comprises a green light laser, and the third light source comprises a blue light laser.
6. The beam combining structure of claim 4 wherein the first light source comprises a red phosphor light source or a red light emitting diode, the second light source comprises a green laser, and the third light source comprises a blue laser.
7. The beam combining structure of claim 2, wherein the holographic recording material comprises at least one of a photopolymer, a silver halide emulsion, a dichromated gelatin, a photodegradable polymer material, a photoconductive thermoplastic material, a photoisomerization material, a photorefractive material, and a metasurface material.
8. The beam combining structure of claim 7, wherein the holographic recording material comprises a photopolymer composed of a photosensitive dye, an initiator, a chain transfer agent, a monomer, a film forming resin, and a plasticizer, wherein the monomer and the film forming resin have refractive indexes different, and the holographic recording is realized by using light to make the monomer diffuse due to concentration difference and form a phase type holographic grating with refractive index modulation with the film forming resin after polymerization.
9. The laser display device is characterized by comprising the beam combining structure, the digital light processing module and the projection lens, wherein the beam combining structure is used for emitting illumination beams, the illumination beams are modulated by the digital light processing module to form image beams, and the image beams are amplified by the projection lens and then output.
10. The laser display device of claim 9, further comprising a screen, wherein the image beam output by the projection lens is transmitted or reflected by the screen and then incident on the eyes of the user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311839910.4A CN117706795A (en) | 2023-12-27 | 2023-12-27 | Beam combining structure and laser display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311839910.4A CN117706795A (en) | 2023-12-27 | 2023-12-27 | Beam combining structure and laser display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117706795A true CN117706795A (en) | 2024-03-15 |
Family
ID=90162302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311839910.4A Pending CN117706795A (en) | 2023-12-27 | 2023-12-27 | Beam combining structure and laser display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117706795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118151399A (en) * | 2024-05-08 | 2024-06-07 | 杭州纳境科技有限公司 | Projection display device and wearable equipment based on superlens |
-
2023
- 2023-12-27 CN CN202311839910.4A patent/CN117706795A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118151399A (en) * | 2024-05-08 | 2024-06-07 | 杭州纳境科技有限公司 | Projection display device and wearable equipment based on superlens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6730442B1 (en) | System and method for replicating volume holograms | |
| US3580655A (en) | Wavefront reconstruction | |
| US3743507A (en) | Recording of a continuous tone focused image on a diffraction grating | |
| CN117706795A (en) | Beam combining structure and laser display device | |
| US3623798A (en) | Blazed hologram fabrication | |
| Piao et al. | Full-color holographic diffuser using time-scheduled iterative exposure | |
| CN104614869A (en) | Ternary exposure technology-based achromatic system and implementation method thereof | |
| US20130120814A1 (en) | Hologram replicating method and hologram replicating apparatus | |
| US3754808A (en) | Holographic readout system employing predispersion diffraction grating | |
| CN111352328B (en) | Holographic display material, holographic display system and holographic display method thereof | |
| KR940020185A (en) | Holographic Projector System for Directional Light Filters and Filter Fabrication | |
| Vázquez-Martín et al. | Full-color multiplexed reflection hologram of diffusing objects recorded by using simultaneous exposure with different times in photopolymer Bayfol® HX | |
| US3936138A (en) | Method of reconstructing holograms using a reflected undiffracted beam as a reconstruction beam | |
| CN110488397B (en) | Single-frame imaging device capable of coding and imaging method | |
| CN114237002B (en) | System for generating image plane hologram | |
| KR20140027812A (en) | Phase mask and holographic recording apparatus employing the same | |
| CN117631430A (en) | Speckle suppression screen and laser display device | |
| RU2498380C2 (en) | Device for recording microholograms | |
| CN117631122A (en) | Laser phase modulation method for laser display | |
| CN117631432A (en) | Fresnel screen and laser display device | |
| CN117741919A (en) | Laser display device | |
| Kodama et al. | Mastering process for color graphic arts holograms | |
| JP3594141B2 (en) | Manufacturing method of micro hologram array for liquid crystal display | |
| CN220962152U (en) | Holographic optical screen preparation system and projection display system | |
| CN217655308U (en) | Manufacturing system of grating scattering device and volume holographic signal lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |