KR101220921B1 - Device for photographing three-dimensional stereoscopic video - Google Patents

Abstract

Disclosed is a stereoscopic imaging apparatus. The disclosed stereoscopic imaging apparatus includes: left and right objective lenses for receiving primary left and right incident light, respectively, and spaced apart from left and right objective lenses, respectively, for adjusting binocular spacing and equalizing binocular optical field length. A split polarizer for controlling binocular image separation by controlling the polarization of each incident light input through the binocular control unit, left and right objective lenses, and a polarization beam splitter for synthesizing and separating the P and S waves separated by the split polarizer. And a relay lens that transmits the first imaging image of the left and right objective lenses to the camera, and the binocular image received through the left and right objective lenses is passed through a common relay lens to implement stereoscopic imaging. Stereoscopic imaging device characterized in that.

Description

Stereoscopic imager {DEVICE FOR PHOTOGRAPHING THREE-DIMENSIONAL STEREOSCOPIC VIDEO}

The present invention relates to a stereoscopic image capturing apparatus, and more particularly, to a stereoscopic image capturing apparatus that is compact, lightweight, and has excellent performance and easy operation and provides convenience in terms of portability and photographing.

3D stereoscopic image technology is intended to realize a vivid image and is in the spotlight as the next generation image technology. Recently, the production of various 3D video contents such as movies, education, and advertisements has been actively made, and the size of the related market is expected to expand greatly with the spread of 3D TVs.

3D stereoscopic image technology uses the principle of binocular disparity in which humans see the world through their eyes. The human eyes are about 65mm apart, which causes the left and right eyes to see different two-dimensional images. The brain synthesizes and recognizes two different images to feel a three-dimensional effect. Therefore, in order to obtain a stereoscopic image, a subject is photographed using two image cameras corresponding to the left and right eyes of a human, and the left and right images are synchronized and synthesized.

On the other hand, in order to obtain the left image and the right image, a so-called 'rig' (rig) equipment is called. The rig is a core equipment for precise control of two video cameras installed and can be divided into horizontal rig and orthogonal rig according to the arrangement of video cameras.

Since the horizontal rig has to focus and zoom each separately, there is a problem in that the operation is inconvenient.

In addition, the vertical rig separates the left and right images in the horizontal and vertical directions by the half mirror. Like the horizontal rig, the vertical rig must be operated separately, and the transmission by the half mirror: the separation ratio is exactly 1: 1. There is a problem that is difficult to be the object distance between the two lenses is easy to be different from each other, so that the ratio of the image is not matched a lot occurs, it needs to be adjusted. have.

Therefore, there is a need to improve this.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

The present invention has been created by the necessity as described above, it is easy to operate by focusing the left and right eye image image at the same time, the overall volume and length can be reduced, it is possible to reduce the size and weight to provide convenience in terms of portability and shooting Its purpose is to provide a three-dimensional imaging device.

Left and right objective lens for receiving the left and right incident light, respectively, according to the present invention, and the left and right objective lens, respectively, and the left and right objective lens are spaced apart from each other to adjust the binocular spacing and to make the binocular optical field equal A polarization beam splitter for controlling bipolarization image separation by controlling the polarization of each incident ray entering through the left and right objective lenses, and a polarization beam splitter for synthesizing and separating the P and S waves separated by the separation polarizer; It includes a relay lens for transmitting the first imaging image by the right-eye objective lens to the camera, and the stereoscopic image shooting is implemented by allowing the binocular image received through the left and right objective lens through a common relay lens. .

In addition, the binocular control unit is provided on the rear side of the right-eye objective lens and the first and second prism for reflecting the incident light entering through the right-eye objective lens and transmitted to the polarization beam splitter, and is provided on the rear side of the left-eye objective lens through the left eye objective lens And a third prism reflecting the incident light beam passing through the glass block and the incident light beam passing through the glass block to the polarization beam splitter.

In addition, the first prism, the second prism, the glass block, and the third prism are characterized by reflecting the incident light of the right eye lens and the left eye lens in the same direction.

In addition, the polarizing beam splitter is located in front of the relay lens, respectively, and combines the P and S waves representing the left and right eye images, respectively, and transmits the P polarizing beam splitter and the rear of the relay lens to transmit the P and S waves, respectively. It characterized in that it comprises a rear polarizing beam splitter for transmitting to the camera side.

In addition, it is characterized in that the transmission and reflection frequency and direction of the P wave and the S wave is adjusted according to the arrangement of the rear polarization beam splitter.

In addition, the relay lens is characterized in that it comprises an aperture for adjusting the brightness of the left and right images in common.

In addition, the relay lens is characterized in that the primary image of each of the right-eye objective lens and the left-eye objective lens are commonly received and transmitted to the camera at a ratio of 1: 1.

In addition, the rear end of the relay lens is characterized in that the correction polarizer for filtering the polarization caused by the mechanical optical factors back to the P wave and the S wave.

The stereoscopic image photographing apparatus according to the present invention has an effect of simplifying operation in comparison with the conventional focusing of the left and right eye image images by a single relay lens at the same time.

In addition, the present invention can reduce the overall volume and length can be compact, light weight, excellent in performance, and easy to operate has the effect of providing convenience in terms of portability or shooting.

1 is a view showing an arrangement of a stereoscopic imaging apparatus according to an embodiment of the present invention;
2 is a view illustrating separation of polarized light P and S waves of a stereoscopic image photographing apparatus according to an embodiment of the present invention;
3 is a view illustrating a binocular control unit of a stereoscopic image photographing apparatus according to an embodiment of the present invention;
4 is a view showing P-wave and S-wave synthesis and separation of a three-dimensional image pickup apparatus polarizing beam splitter according to an embodiment of the present invention;
5 is a view showing a transmission and reflection direction according to the arrangement of the three-dimensional image pickup apparatus polarization beam splitter according to an embodiment of the present invention;
6 is a view illustrating a corrected polarizer of a stereoscopic image photographing apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of a stereoscopic imaging apparatus according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a diagram illustrating an arrangement of a stereoscopic image photographing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating separation of polarized light P and S waves of a stereoscopic image photographing apparatus according to an embodiment of the present invention. 3 is a view showing the binocular control unit of the three-dimensional image recording apparatus according to an embodiment of the present invention, Figure 4 is a P-wave, S-wave synthesis of the three-dimensional image recording apparatus polarizing beam splitter according to an embodiment of the present invention And a view showing separation, FIG. 5 is a view showing a transmission and reflection direction according to the arrangement of the three-dimensional imaging apparatus polarizing beam splitter according to an embodiment of the present invention, Figure 6 is a three-dimensional view according to an embodiment of the present invention The corrected polarizer of the imaging device is shown.

1 to 6, the stereoscopic image capturing apparatus 100 according to an embodiment of the present invention includes left and right objective lenses 110a and 110b, a binocular adjusting unit 130, a separated polarizer 120, and polarization. It includes a beam splitter 140, a relay lens 150.

A feature of the present invention lies in the arrangement layout of the optical elements described above as shown in FIG. 1.

The objective lens 110 includes a left eye objective lens 110a and a right eye objective lens 110b. The objective lens 110 receives the left eye incident light and the right eye incident light, respectively, and performs primary imaging.

In this design, the distance between the left eye objective lens 110a and the right eye objective lens 110b is arranged at an interval of 65 mm, but the interval can be adjusted as necessary.

It is preferable to adjust the spacing by adopting rack pinion gear method, and various design changes such as cylinders are possible.

Separate polarizers 120 are disposed at the rear ends of the left and right objective lenses 110a and 110b. The separation polarizer is composed of a left eye separation polarizer 120a and a right eye separation polarizer 120b provided at the rear ends of the left and right eye lenses, respectively, and as shown in FIG. 2, P wave (Primary Wave) and S wave (Secondary) Separate the wave).

That is, the first unpolarized light passes through the left and right objective lens 110a and then is separated into P and S waves through the separation polarizer 120.

The left and right eye lenses 110a and 110b are provided at the rear sides of the binocular adjusting unit 130, respectively. The binocular control unit 130 is for equalizing the binocular spacing and equalizing the length of the binocular optical path, and is provided at the rear side of the right eye objective lens 110b to reflect the incident light entering through the right eye objective lens 110b. The glass blocks 136 and the glass blocks 136 provided at the rear of the first and second prisms 132 and 134 and the left eye objective lens 110a passing through the left eye objective lens 110a to pass through the first and second prisms 132 and 134. And a third prism 138 that reflects the incident light beams passing through the beams to the polarization beam separator 140.

That is, as shown in FIG. 3, the first, second, and third prisms 132, 134, and 138 and the glass blocks 136 are arranged under accurate calculation to match the binocular spacing, and to match the optical path length of the P wave and the optical path length of the S wave. Optical path length is the sum of the refractive index times the distance.

The incident light incident through the right eye lens lens 110b and the left eye lens lens lens 110a is directed in the same direction through the first and second prisms 132 and 134, the glass block 136, and the third prism 138, respectively. Reflect.

The polarization beam separator 140 synthesizes and separates the P wave and the S wave separated by the separation polarizer 120. That is, as shown in FIG. 4, polarization may be synthesized or separated for P and S waves.

The polarization beam splitter 140 is located in front of the relay lens 150 to be described later, and the front polarized beam splitter 140a for synthesizing the P wave and the S wave representing the left and right eye images, respectively, and transmitting the P and S waves to the relay lens, and the relay lens ( It is located in the rear of the 150 and includes a rear polarized beam splitter (140b) for transmitting the P wave and the S wave to each camera 170 side.

That is, the front polarization beam splitter 140a plays a role of synthesizing and transmitting P waves and S waves.

In addition, the rear polarized beam splitter 140b is positioned behind the relay lens 150 to transmit P waves and S waves to the respective cameras 170, and the transmission and reflection directions of the P waves and S waves are changed according to the arrangement direction. It is possible.

As shown in FIG. 5, the P polarization beam separator 140b transmits the P wave and reflects the S wave. However, when the rear polarization beam separator 140b is rotated by 90 °, the P polarization beam separator 140b is reflected and the S wave is transmitted. You can do that.

The relay lens 150 is provided between the front polarized beam splitter 140a and the rear polarized beam splitter 140b. Then, the first imaging image by the left and right objective lenses 110a and 110b is transmitted to the camera 170 at a magnification of 1: 1. In the present embodiment, the relay lens 150 is designed with a fixed focus, but the zoom lens may be designed with a zoom lens to change the magnification of the primary image.

In addition, the diaphragm 155 is inserted into the relay lens 150 to control the amount of light, thereby adjusting the brightness of the left and right images.

The rear end of the rear polarization beam splitter 140b is further provided with a correction polarizer 160 for filtering the polarization of the distortion caused by mechanical or optical factors back to the P wave and S wave.

That is, the corrected polarizer 160 is composed of a left eye corrected polarizer 160a and a right eye corrected polarizer 160b, and P and S waves, which are distorted while passing through several optical elements provided on the front side, are respectively corrected by the left eye corrected polarizer 160a. The image is corrected through the right eye correcting polarizer 160b and transmitted to the left and right cameras 170a and 170b, respectively, and the images formed on the left and right cameras 170a and 170b may be viewed in stereoscopic fashion through a 3DTV or a 3D monitor.

Hereinafter, operations and effects of the stereoscopic imaging apparatus according to the embodiment of the present invention will be described.

First, the image is received from the left and right objective lenses 110a and 110b. The image entering the left and right objective lenses 110a and 110b is polarized by the left and right eye polarizers 120a and 120b to separate the unpolarized image into P waves and S waves representing left and right.

At this time, the first, second, third prism 132, 134, 138 and the glass block 136 are arranged under accurate calculation to maintain the binocular spacing as well as to match the optical path length.

The primary imaging image is telecentric and has no impact on performance, whether in the air, in a prism, or in a glass block.

P-waves and S-waves separated by the left-eye and right-eye split polarizers 120a and 120b are transmitted to the front polarized beam splitter 140a, synthesized, and transmitted to a single relay lens 150.

That is, the binocular image received through the left and right objective lenses 110a and 110b is delivered to the single relay lens 150 to be focused, and the amount of light can be adjusted by the aperture 155 so that the respective focusing is performed separately. It is simpler to operate.

The P-wave and the S-wave are transmitted to the respective cameras 170 through the rear polarization beam separator 140b through the relay lens 150.

Between the rear polarizing beam splitter 140b and the left and right cameras 170a and 170b, a left eye correction polarizer 160a and a right eye correction polarizer 160b are respectively provided to correct P- and S-waves that are distorted while passing through several optical elements. .

As described above, the image transferred to each camera 170 and formed into an image may be viewed in three dimensions through a 3D TV or 3D monitor.

As described above, according to the present invention, the overall volume and length can be reduced, so that the size and weight can be reduced, and the performance is excellent and the operation can be easily performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

100: stereoscopic image recording device 110: objective lens
110a: left eye lens 110b: right eye lens
120: separation polarizer 120a: left eye separation polarizer
120b: right eye separation polarizer 130: binocular control unit
132: first prism 134: second prism
136: glass block 138: the third prism
140: polarized beam splitter 140a: front side polarized beam splitter
140b: rear polarization beam splitter 150: relay lens
155: Aperture 160: Corrected Polarizer
160a: left eye correction polarizer 160b: right eye correction polarizer
170: camera 170a: left eye camera
170b: Right eye camera

Claims (8)

Left and right objective lens for receiving the left and right incident light, respectively, and primary imaging;
A binocular control unit provided to be spaced apart from the left and right objective lenses, respectively, to make a binocular spacing and equal an optical path length of both eyes;
Separation polarizer for implementing binocular image separation by controlling the polarization of each incident light entering through the left and right objective lens;
A polarization beam separator for synthesizing and separating the P and S waves separated by the separation polarizers;
It includes a relay lens for transmitting the primary imaging image by the left, right objective lens to the camera;
Stereoscopic imaging is realized by allowing the binocular images received through the left and right objective lenses to pass through the common relay lens;
First and second prisms provided at the rear side of the right eye objective lens to reflect incident light entering through the right eye objective lens to be transmitted to the polarizing beam separator;
A glass block provided at a rear side of the left eye lens and configured to pass an incident light beam through the left eye lens; And
A third prism reflecting incident light passing through the glass block and transmitting the reflected light to the polarization beam separator;
The left and right objective lens has a viewing angle capable of shooting without affecting the size or position of the subject.
delete The method of claim 1,
And the first, second prism, the glass block, and the third prism reflect incident light of the right eye lens and the left eye lens, respectively, in the same direction.
The method of claim 1,
The polarizing beam splitter is located in front of the relay lens and the front polarized beam splitter for synthesizing the P wave and the S wave respectively representing the left and right eye images to the relay lens; And
And a rear polarization beam splitter positioned behind the relay lens to transmit P waves and S waves to the cameras.
5. The method of claim 4,
And adjusting the number of times and directions of transmission and reflection of P waves and S waves according to the arrangement of the rear polarization beam splitter.
The method of claim 1,
The relay lens is a stereoscopic imaging apparatus, characterized in that it comprises an aperture for adjusting the brightness of the left and right images in common.
The method of claim 1,
The relay lens is a stereoscopic image photographing apparatus, characterized in that the primary image pickup of each of the right-eye objective lens and the left-eye objective lens in common to transmit to the camera at a ratio of 1: 1.
The method of claim 1,
And a corrected polarizer for filtering the polarized light, which has been distorted due to mechanical optical factors, to the P wave and the S wave at the rear end of the relay lens.

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