CN104483810A - 3D projection system adopting holographic technique - Google Patents

Abstract

The present invention relates to a 3D projection system, in particular to a 3D projection system using holographic technology, including a 3D projector, a holographic projector and a graphics analysis control host, wherein the holographic projector is used to transform objects The image forms a holographic picture, and then sends the holographic picture to the graphic analysis control host; the graphic analysis control host is used to decode and edit the holographic picture sent by the holographic projector, and then send the decoded and edited holographic picture to the 3D projector ; The 3D projector is used to project the hologram sent by the graphics analysis control host. After adopting the above structure, the 3D projection system using holographic technology in the present invention can compare and adjust the image sent to the 3D projector and the image input by the holographic projector through the graphics analysis control host, so as to ensure the clarity of projection of the 3D projection system .

Description

3D projection system using holographic technology

technical field

The invention relates to a 3D projection system, in particular to a 3D projection system using holographic technology.

Background technique

3D holographic projection is a kind of 3D technology that uses the principle of interference and diffraction to record and reproduce the real three-dimensional image of an object. It is a 3D technology that does not need to wear glasses, and the audience can see three-dimensional virtual characters.

The first step of holographic technology is to use the interference principle to record the light wave information of the object, which is the shooting process: the object to be photographed forms a diffuse object beam under laser irradiation; The superposition produces interference, which converts the phase and amplitude of each point on the object light wave into a spatially varying intensity, so that all information of the object light wave can be recorded by using the contrast and interval between the interference fringes. After the negative film recording the interference fringes undergoes processing procedures such as developing and fixing, it becomes a hologram, or a hologram; the second step is to reproduce the light wave information of the object by the principle of diffraction, which is the imaging process: a hologram is like a For complex gratings, under the irradiation of coherent laser light, the diffracted light waves of a linearly recorded sinusoidal hologram can generally give two images, namely the original image (also known as the initial image) and the conjugate image. The reproduced image has a strong three-dimensional effect and has a real visual effect. Each part of the hologram records the optical information of each point on the object, so in principle, each part of it can reproduce the entire image of the original object, and multiple different images can be recorded on the same film through multiple exposures. And they can be displayed separately without interfering with each other.

Chinese utility model patent CN 202911636U discloses a head-up display system based on holographic projection technology, the system includes: two projectors respectively installed on the two A-pillars of the car: a holographic film installed under the front windshield, It is used to receive 3D projection data from the projector; the control center receives the driving information, calculates the 3D projection data corresponding to the driving information according to the preset database, and sends it to the projector for projection. By displaying the driving information three-dimensionally on the front windshield, the driver can check the driving information without looking down, reducing driving fatigue. The head-up display system realized by holographic film and holographic projection technology can display more information.

Contents of the invention

The technical problem to be solved by the present invention provides a 3D projection system using holographic technology.

In order to solve the above-mentioned technical problems, the 3D projection system using holographic technology in the present invention includes a 3D projector, and also includes a holographic projector and a graphic analysis control host, wherein

The holographic projector is used to form the image of the object into a holographic picture through holographic projection technology, and then send the holographic picture to the graphic analysis control host;

The graphics analysis control host is used to decode and edit the holographic pictures sent by the holographic projector, and then send the decoded and edited holographic pictures to the 3D projector;

The 3D projector is used to project the hologram sent by the graphic analysis control host.

Further, the holographic projector includes a laser, and the laser is divided into two beams after passing through the first beam expander, one of which is projected onto the holographic film through the second beam expander after being reflected by the first plane mirror; The beam passes through the second plane mirror, passes through the third beam expander, passes through the object, and then diffusely reflects onto the holographic film, and also includes an image acquisition unit for collecting the image of the object on the holographic film.

Further, the graphic analysis control host includes an image decoding unit, the input end of the image decoding unit is connected to the image acquisition unit of the holographic projector, the output end of the image decoding unit is connected to the input end of the image editing unit, and the The output end of the image editing unit is connected with the input end of the image comparison unit, the output end of the image comparison unit is connected with the input end of the image comparison unit through a proportional integral adjustment unit, and the output end of the image comparison unit is an image analysis unit. Control host output.

Further, the image comparison unit includes a differential amplifier and a comparator, the differential amplifier is connected to the comparator, the input terminal of the differential amplifier is the input terminal of the image comparison unit, and the output terminal of the comparator is the image Compare unit output.

After adopting the above-mentioned structure, the 3D projection system using holographic technology in the present invention can compare and adjust the image sent to the 3D projector and the image input by the holographic projector through the graphics analysis control host to ensure the clarity of the projection of the 3D projection system .

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a system structural block diagram of a 3D projection system using holographic technology according to the present invention.

Fig. 2 is a schematic structural diagram of a holographic projector of the present invention.

Fig. 3 is a schematic diagram of the structure of the graphics analysis control host computer of the present invention.

In the figure: 1 is a holographic projector, 2 is a graphic analysis control host, 3 is a 3D projector, 4 is an object

101 is a laser, 102 is a first beam expander, 103 is a first plane mirror, 104 is a second plane mirror, 105 is a third beam expander, 106 is a second beam expander, 107 is a holographic film, and 108 is an image acquisition unit , 201 is an image decoding unit, 202 is an image editing unit, 203 is an image comparison unit, 204 is a proportional-integral adjustment unit, 205 is a differential amplifier, and 206 is a comparator

Detailed ways

As shown in FIG. 1 , the 3D projection system using holographic technology of the present invention includes a 3D projector 3 , a holographic projector 1 and a graphic analysis control host 2 . Among them, the holographic projector is used to form the image of the object into a holographic picture through holographic projection technology, and then send the holographic picture to the graphic analysis control host; the graphic analysis control host is used to decode and edit the holographic picture sent by the holographic projector, Then, the decoded and edited holographic picture is sent to the 3D projector; the 3D projector is used to project the holographic picture sent by the graphic analysis control host.

Wherein, as shown in Figure 2, the holographic projector of the present invention includes a laser 101, the laser is divided into two beams after passing through the first beam expander 102, one of which passes through the second beam expander after being reflected by the first plane mirror 103 The mirror 106 is projected onto the holographic film 107; the other beam passes through the second plane mirror 104, passes through the third beam expander 105 and diffusely reflects on the holographic film 107 after the object 4, and the two beams of light form the object on the holographic film 107 by interference. image. It also includes an image acquisition unit 108 for acquiring images of objects on the holographic film.

As shown in FIG. 3 , the graphic analysis control host of the present invention includes an image decoding unit 201 , and the input end of the image decoding unit 201 is connected to the image acquisition unit 104 of the holographic projector. The output end of the image decoding unit 201 is connected to the input end of the image editing unit 202, the output end of the image editing unit 202 is connected to the input end of the image comparison unit 203, and the output end of the image comparison unit is adjusted by proportional integral The unit 204 is connected to the input end of the image comparison unit, where the output image is adjusted by the proportional-integral adjustment unit to make the projection of the 3D projection system clearer. The output end of the image comparison unit is the output end of the image analysis control host, the image comparison unit includes a differential amplifier 205 and a comparator 206, the differential amplifier is connected to the comparator, and the input end of the differential amplifier is The input end of the image comparison unit, the output end of the comparator is the output end of the image comparison unit.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and various changes or modifications can be made to the embodiments without departing from the principle and essence of the invention. The scope is limited only by the appended claims.

Claims (4)

1. adopt a 3D optical projection system for holographic technique, comprise 3D projector, it is characterized in that: also comprise holographic projector and pattern analysis main control system, wherein

Holographic projector, for the image of object being formed holographic picture by line holographic projections technology, then sends to pattern analysis main control system by holographic picture;

Pattern analysis main control system, carries out decoding editor for the holographic picture sent by holographic projector, then the holographic picture after decoding editor is sent to 3D projector;

3D projector, projects for the holographic picture sent by pattern analysis main control system.

2. according to the 3D optical projection system of employing holographic technique according to claim 1, it is characterized in that: described holographic projector comprises laser instrument, described laser instrument is divided into two bundles after the first beam expanding lens, wherein a branch ofly projects on holofilm by the second beam expanding lens after by the first flat mirror reflects; Another bundle on holofilm, also comprises the image acquisition units for gathering subject image on holofilm by the diffuse reflection after object of the 3rd beam expanding lens by the second level crossing.

3. according to the 3D optical projection system of employing holographic technique according to claim 1, it is characterized in that: described pattern analysis main control system comprises image decoding unit, described image decoding unit input end is connected with the image acquisition units of holographic projector, the output terminal of described image decoding unit is connected with image editing unit input end, described image editing unit output terminal is connected with image comparing unit input end, described image comparing unit output terminal passing ratio integration adjustment unit is connected with image comparing unit input end, described image comparing unit output terminal is graphical analysis main control system output terminal.

4. according to the 3D optical projection system of employing holographic technique according to claim 3, it is characterized in that: described image comparing unit comprises differential amplifier and comparer, described differential amplifier is connected with comparer, described differential amplifier input end is image comparing unit input end, and described comparator output terminal is image comparing unit output terminal.