CN111399358A - Holographic display screen shooting method with overlapped reflected and diffracted lights - Google Patents
Holographic display screen shooting method with overlapped reflected and diffracted lights Download PDFInfo
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- CN111399358A CN111399358A CN202010360868.8A CN202010360868A CN111399358A CN 111399358 A CN111399358 A CN 111399358A CN 202010360868 A CN202010360868 A CN 202010360868A CN 111399358 A CN111399358 A CN 111399358A
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- light
- dry plate
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- holographic dry
- reflected
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000001427 coherent effect Effects 0.000 claims abstract description 9
- 238000011161 development Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- -1 silver halide Chemical class 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2249—Holobject properties
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
- G03H2001/2213—Diffusing screen revealing the real holobject, e.g. container filed with gel to reveal the 3D holobject
- G03H2001/2215—Plane screen
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
Abstract
The invention discloses a method for shooting a holographic display screen with superposed reflected and diffracted lights, which comprises the following steps: dividing emergent light of the laser into two beams of coherent light which are respectively marked as a light beam 1 and a light beam 2 by a light splitting device, and respectively injecting the two beams of coherent light to two sides of the holographic dry plate substitute; adjusting an internal optical path of the light splitting device to enable the light beam 1 to be incident to the holographic dry plate substitute at an angle theta, and enabling the direction of the light beam 2 to be parallel to the reflected light of the light beam 1 after passing through the holographic dry plate substitute; turning off the laser, and replacing the holographic dry plate substitute with a holographic dry plate; opening a laser, and shooting the duration t of the holographic dry plate; and processing the shot holographic dry plate to realize development. The invention has higher image light utilization efficiency and higher transparency, can be applied to vehicle-mounted and airborne displays, individual soldiers, pilots, police, entertainment helmet displays and the like, and ensures that an application object has the characteristics of high diffraction reflection efficiency, no dispersion, light weight, small volume, low cost and the like.
Description
Technical Field
The invention belongs to the field of holographic optics, particularly relates to the field of airborne display, and particularly relates to a method for shooting a holographic display screen with superposed reflected and diffracted lights.
Background
The airborne aiming display technology is perspective display technology used for displaying airplane aiming attack and navigation information. When the pilot uses the aiming display device, the target information and the aiming information superposed on the target information can be observed simultaneously, and key information provided by other sensors can be observed simultaneously. And the pilot can observe the key information of the airplane, such as flight speed, direction, altitude, weapon state, ground and command of fighters, without lowering head while observing the external scene. The use of the onboard helmet sight effectively improves the fighting capacity of the fighter plane. The technology can also be used in the fields of vehicle-mounted flat panel display, individual helmets, police helmets, entertainment helmets and the like.
The individual helmet generally adopts a projection display principle, and the small size and light weight are always indexes pursued in the development process of the individual helmet. The glass surface is plated with a semi-transparent and semi-reflective film which is semi-transparent and semi-reflective to all wavelengths of light, so that the signal image entering human eyes is 0.5, the ambient light is 0.5, the total brightness entering human eyes is 1, actually less than 1 and only 0.9, and therefore, the utilization efficiency of the image light is not high, the transparency is not high, the quality and the volume cannot reach the target, and the cost is high.
Disclosure of Invention
The invention aims to provide a holographic display screen shooting method for superposition of reflected diffracted light.
The technical solution for realizing the purpose of the invention is as follows: a method of photographing a holographic display screen in which reflected diffracted light coincides, the method comprising the steps of:
step 1, dividing emergent light of a laser into two beams of coherent light which are respectively marked as a light beam 1 and a light beam 2 by a light splitting device, and respectively injecting the two beams of coherent light to two sides of a holographic dry plate substitute;
here, the two coherent lights may be parallel light, diffuse spherical light, and convergent spherical light, depending on the design requirements of the object-image relationship.
Step 2, adjusting an internal light path of the light splitting device to enable the light beam 1 to be incident to the holographic dry plate substitute at an angle theta, and enabling the direction of the light beam 2 to be parallel to the reflected light of the light beam 1 after passing through the holographic dry plate substitute;
step 3, turning off the laser, and replacing the holographic dry plate substitute with a holographic dry plate;
step 4, turning on a laser, and shooting the duration t of the holographic dry plate;
and 5, processing the shot holographic dry plate to realize development.
Further, the light splitting device in step 1 comprises a light splitting element, a collimating element and a reflecting mirror which are coaxially arranged in sequence, and the angle of the reflecting mirror is adjustable.
Further, the light splitting device in step 1 further comprises a lens arranged behind the reflector, and the distance between the lens and the reflector is adjustable.
Further, the laser in step 1 is a single-mode semiconductor laser.
Further, the holographic dry plate substitute in step 1 adopts a transparent glass plate.
Further, the angle θ in step 2 is in the range of 30 ° < θ < 60 °.
Further, the holographic dry plate in the step 3 is a silver halide holographic dry plate.
Compared with the prior art, the invention has the following remarkable advantages: 1) the traditional film coating method has the maximum value of the image reflectivity of 50 percent and the maximum value of the natural light transmissivity of 50 percent, and the holographic display screen obtained by the shooting method has the reflectivity of the image energy of more than 80 percent and the transmissivity of the natural light of more than 85 percent; 2) the traditional plane film coating method only has the reflecting function, needs other optical systems for magnification or reduction, has complex structure and heavy weight, and can magnify or reduce the image field angle, namely has the comprehensive functions of reflection and lens; 3) the implementation is simple, the application range is wide, the holographic display screen can be applied to vehicle-mounted and airborne head-up displays, individual soldiers and pilot helmet displays, police and entertainment helmet displays, a user can observe images from the image display while observing an external scene through the holographic display screen, and an application object of the holographic display screen has the characteristics of simplicity in manufacture, high diffraction reflection efficiency, no dispersion, light weight, small size, low cost and the like.
The present invention is described in further detail below with reference to the attached drawing figures.
Drawings
FIG. 1 is a schematic diagram of a holographic display imaging method in which reflected diffracted light is coincident in one embodiment.
Fig. 2 is a schematic diagram of an embodiment of the present invention applied to a vehicle-mounted flat panel display.
Fig. 3 is a schematic diagram of the application of the present invention to an individual helmet in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, in conjunction with FIG. 1, the present invention provides a method for imaging a holographic display with coincident reflected and diffracted light, the method comprising the steps of:
step 1, dividing emergent light of a laser into two beams of coherent light which are respectively marked as a light beam 1 and a light beam 2 by a light splitting device, and respectively injecting the two beams of coherent light to two sides of a holographic dry plate substitute;
step 2, adjusting an internal light path of the light splitting device to enable the light beam 1 to be incident to the holographic dry plate substitute at an angle theta, and enabling the direction of the light beam 2 to be parallel to the reflected light of the light beam 1 after passing through the holographic dry plate substitute;
step 3, turning off the laser, and replacing the holographic dry plate substitute with a holographic dry plate;
step 4, turning on a laser, and shooting the duration t of the holographic dry plate;
and 5, processing the shot holographic dry plate to realize development.
Here, the processing generally includes: exposure- > development- > bleaching- > desensitization- > dehydration- > drying.
Further, in one embodiment, the light splitting device in step 1 includes a light splitting element, a collimating element and a reflecting mirror, which are coaxially disposed in sequence, and an angle of the reflecting mirror is adjustable.
Further, in one embodiment, the light splitting device in step 1 further includes a lens disposed behind the reflector, and a distance between the lens and the reflector is adjustable.
Further, in one embodiment, the laser in step 1 is a single-mode semiconductor laser.
Illustratively, in one embodiment, the laser in step 1 is a single-mode semiconductor laser with a wavelength of 532nm and a power of 50 mW. For this laser, t, which is the length of time for which the holographic plate is photographed in step 4, is preferably 8s to 15 s.
Further, in one embodiment, the holographic dry plate substitute of step 1 may be a transparent glass plate.
Further preferably, in one embodiment, the angle θ in step 2 is in the range of 30 ° < θ < 60 °.
Further, in one embodiment, the holographic dry plate in step 3 is specifically a silver halide holographic dry plate.
The silver halide holographic dry plate has mature manufacturing process, and when a holographic photo is shot, the emulsion layer has small shrinkage and high sensitivity to light, and is convenient to process, and moisture and humidity are not affected.
Illustratively, fig. 2 shows the usage of the vehicle-mounted flat panel display, and through simulation analysis, 80% of image energy of the image display screen enters human eyes through reflection and diffraction of the holographic reflection screen, and 85% of external scenery enters the human eyes at the same time. Fig. 3 is a schematic diagram of the use of the holographic display screen in the helmet of the individual pilot, and through simulation analysis, 80% of energy from the image display screen is reflected and diffracted by the holographic display screen to enter human eyes, and 85% of natural light external scenes enter the human eyes.
Compared with the traditional method, the method has the advantages of higher image light utilization efficiency, higher transparency, light weight, small volume, low cost and the like.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A method for shooting a holographic display screen with superposed reflected and diffracted lights is characterized by comprising the following steps of:
step 1, dividing emergent light of a laser into two beams of coherent light which are respectively marked as a light beam 1 and a light beam 2 by a light splitting device, and respectively injecting the two beams of coherent light to two sides of a holographic dry plate substitute;
step 2, adjusting an internal light path of the light splitting device to enable the light beam 1 to be incident to the holographic dry plate substitute at an angle theta, and enabling the direction of the light beam 2 to be parallel to the reflected light of the light beam 1 after passing through the holographic dry plate substitute;
step 3, turning off the laser, and replacing the holographic dry plate substitute with a holographic dry plate;
step 4, turning on a laser, and shooting the duration t of the holographic dry plate;
and 5, processing the shot holographic dry plate to realize development.
2. The method for photographing a holographic display screen with overlapped reflected and diffracted lights according to claim 1, wherein the beam splitting device of step 1 comprises a beam splitting element, a collimating element and a reflecting mirror coaxially arranged in sequence, and the angle of the reflecting mirror is adjustable.
3. The method for photographing a holographic display of the reflected and diffracted light coincided according to claim 2, wherein the beam splitting device of step 1 further comprises a lens disposed behind the mirror, and a distance between the lens and the mirror is adjustable.
4. The method for photographing a holographic display of reflected diffracted light coincidence as claimed in claim 1, wherein said laser in step 1 is a single-mode semiconductor laser.
5. The method for photographing a holographic display of reflected diffracted light coincidence of claim 1, wherein the holographic dry plate substitute of step 1 is a transparent glass plate.
6. The method for photographing a holographic display of reflected diffracted light coincidence of claim 1, wherein the angle θ in step 2 is in the range of 30 ° < θ < 60 °.
7. The method for photographing a holographic display in which reflected and diffracted light coincide according to claim 1, wherein the holographic dry plate in step 3 is a silver halide holographic dry plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360868.8A CN111399358A (en) | 2020-04-30 | 2020-04-30 | Holographic display screen shooting method with overlapped reflected and diffracted lights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360868.8A CN111399358A (en) | 2020-04-30 | 2020-04-30 | Holographic display screen shooting method with overlapped reflected and diffracted lights |
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| Publication Number | Publication Date |
|---|---|
| CN111399358A true CN111399358A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010360868.8A Pending CN111399358A (en) | 2020-04-30 | 2020-04-30 | Holographic display screen shooting method with overlapped reflected and diffracted lights |
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| CN (1) | CN111399358A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173782A (en) * | 1988-12-27 | 1990-07-05 | Central Glass Co Ltd | Holographic display device |
| CN102914935A (en) * | 2011-06-10 | 2013-02-06 | 株式会社尼康 | Projector and image capturing apparatus |
| CN103140791A (en) * | 2010-10-01 | 2013-06-05 | 松下电器产业株式会社 | See-through display device and vehicle having see-through display device mounted thereon |
| CN203825374U (en) * | 2014-04-21 | 2014-09-10 | 象山星旗电器科技有限公司 | Reflection type volume holographic grating based light path experimental device |
| US20170153450A1 (en) * | 2005-11-23 | 2017-06-01 | Fusao Ishii | High contrast projection screen |
| CN110109320A (en) * | 2019-05-09 | 2019-08-09 | 深圳市深大极光科技有限公司 | A kind of production method and producing device of hololens projection screen |
-
2020
- 2020-04-30 CN CN202010360868.8A patent/CN111399358A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173782A (en) * | 1988-12-27 | 1990-07-05 | Central Glass Co Ltd | Holographic display device |
| US20170153450A1 (en) * | 2005-11-23 | 2017-06-01 | Fusao Ishii | High contrast projection screen |
| CN103140791A (en) * | 2010-10-01 | 2013-06-05 | 松下电器产业株式会社 | See-through display device and vehicle having see-through display device mounted thereon |
| CN102914935A (en) * | 2011-06-10 | 2013-02-06 | 株式会社尼康 | Projector and image capturing apparatus |
| CN203825374U (en) * | 2014-04-21 | 2014-09-10 | 象山星旗电器科技有限公司 | Reflection type volume holographic grating based light path experimental device |
| CN110109320A (en) * | 2019-05-09 | 2019-08-09 | 深圳市深大极光科技有限公司 | A kind of production method and producing device of hololens projection screen |
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Application publication date: 20200710 |
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| RJ01 | Rejection of invention patent application after publication |