Stereoscopic camera lens and camera

Abstract

The utility model relates to a stereo pick-up lens and a camera. The stereoscopic imaging lens is attachable to and detachable from a main body of a camera, and includes: a first lens system that forms an optical image of a subject in a first imaging region; and a second lens system that is disposed side by side with the first lens system and that forms an optical image of the subject in the second imaging region, in which the first and second lens systems are disposed such that imaging circles formed by the first and second lens systems overlap both the first and second imaging regions. The stereoscopic imaging lens further comprises a wall member which is provided on the image side of the first and second lens systems and which shields a light beam incident from the first / second lens system to the second / first imaging region. The long side length of the wall member is shorter than the short side length of the imaging sensor forming the first and second imaging regions. As a result, it is possible to prevent two optical images from overlapping during stereoscopic imaging while ensuring miniaturization of the entire camera.

Description

Technical Field

[0001] The utility model relates to the field of optics, in particular to a stereo camera lens and a camera. Background Art

[0002] As a method of stereo photography, there is known a method of photographing an image for reproducing a three-dimensional image using an optical system capable of simultaneously forming a pair of images having a left-right parallax. In the case where only two lens systems arranged side by side are used to form two images side by side in two photographing areas of one imaging sensor, the following problems occur: the left and right images are mixed with each other at the central portion of the imaging sensor; stray light from the right lens system enters the left photographing area; and stray light from the left lens system enters the right photographing area. In this case, the images formed by each lens system overlap each other.

[0003] Regarding the above problems, the prior art has proposed a solution to reduce the intercepted size of the left and right images. However, in this solution, a part of the imaging sensor is not used, which not only causes waste of resources but also leads to the overall enlargement of the camera. In addition, the prior art has also proposed a solution in which a field stop for shielding the light beam that will enter the second photographing area from the first lens system and the light beam that will enter the first photographing area from the second lens system is provided on the subject side of the lens system to prevent the left and right images from overlapping. However, in this solution, since the field stop is close to the lens system, the image near the field stop becomes blurred, and there are disadvantages that the effect of preventing the left and right images from overlapping is incomplete and the overall size of the camera is enlarged. Summary of the Utility Model

[0004] Technical Problem

[0005] In view of this, the technical problem to be solved by the utility model is to provide a stereo camera lens and a camera that can prevent two optical images from overlapping during stereo photography while ensuring the overall miniaturization of the camera.

[0006] Solution

[0007] In order to solve the above technical problems, according to an embodiment of the present utility model, a stereo camera lens is provided, which can be loaded and unloaded relative to the main body of the camera. The stereo camera lens includes: a first lens system that forms an optical image of the subject in a first imaging area; and a second lens system that is arranged side by side with the first lens system and forms an optical image of the subject in a second imaging area. Wherein, the first lens system and the second lens system are configured in the following positional relationship: the imaging circle formed by the first lens system overlaps both the first imaging area and the second imaging area, and the imaging circle formed by the second lens system overlaps both the first imaging area and the second imaging area. The stereo camera lens further includes a wall member that is disposed on the image side of the first lens system and the second lens system and is used to block the light beam incident from the first lens system to the second imaging area and the light beam incident from the second lens system to the first imaging area. When observing along the optical axes of the first lens system and the second lens system, the length of the long side of the wall member is shorter than the length of the short side of the imaging sensor that forms the first imaging area and the second imaging area.

[0008] For the above stereo camera lens, in a possible implementation, when observing along the optical axes of the first lens system and the second lens system, the center of the imaging sensor is located within the wall member.

[0009] For the above stereo camera lens, in a possible implementation, when observing along the optical axes of the first lens system and the second lens system, the center of the imaging sensor coincides with the center of the wall member.

[0010] For the above stereo camera lens, in a possible implementation, the length of the wall member in the direction along the optical axes of the first lens system and the second lens system is less than the minimum value of the mechanical back focus of the camera that can mount the stereo camera lens.

[0011] For the above stereo camera lens, in a possible implementation, the wall member is disposed on the image-side portion of the housing of the stereo camera lens.

[0012] For the above stereo camera lens, in a possible implementation, it further includes a lens mounting member for detachably connecting the stereo camera lens to the main body of the camera, and the wall member is integrally formed with the lens mounting member.

[0013] In order to solve the above technical problems, according to another embodiment of the present utility model, there is provided a camera, comprising: the above-mentioned stereo camera lens; and a camera body, which is provided with an imaging sensor for receiving the optical image formed by the first lens system and the second lens system and converting the optical image into an image signal.

[0014] Advantageous effects

[0015] For the stereo camera lens and the camera according to the embodiments of the present utility model, by providing a wall member on the image side of the stereo camera lens near the first lens system and the second lens system, the long side length of which is shorter than the short side length of the imaging sensor forming the first imaging area and the second imaging area, for shielding the light beam incident from the first lens system to the second imaging area and the light beam incident from the second lens system to the first imaging area, thus, when performing stereo imaging, it is possible to prevent the optical images formed by the two lens systems from overlapping. And when replacing the stereo camera lens, the wall member rotates between the lens system and the imaging sensor as the stereo camera lens rotates in a manner that does not interfere with the internal structure of the camera (such as a low-pass filter, a shake correction mechanism, etc.), and there is no need to further ensure a space for arranging the wall member, so the miniaturization of the entire camera can be ensured.

[0016] According to the following detailed description of the exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present utility model will become clear. Brief description of the drawings

[0017] The drawings included in the specification and constituting a part of the specification show the exemplary embodiments, features and aspects of the present utility model together with the specification, and are used to explain the principles of the present utility model.

[0018] Figure 1 It is a diagram showing the structure and light distribution of the optical system of the stereo camera lens without the wall member.

[0019] Figure 2 It is a reference diagram showing the optical image formed on the imaging sensor through the optical system of the stereo camera lens without the wall member.

[0020] Figure 3 It is a diagram showing the structure and light distribution of the stereo camera lens of the present embodiment.

[0021] Figure 4 It is a diagram showing the wall member and the imaging sensor when observing along the optical axis of the stereo camera lens of the present embodiment.

[0022] Figure 5 It is a schematic diagram showing the rotation of the wall member when observing along the optical axis of the stereo camera lens of the present embodiment.

[0023] Figure 6 It is a sectional view along the cutting line shown by arrow A of a camera equipped with the three-dimensional imaging lens of this embodiment.

[0024] Figure 7 It is a diagram showing the structure on the image side of the three-dimensional imaging lens when viewed along the optical axis of the three-dimensional imaging lens of this embodiment.

[0025] Figure 8 It is another diagram showing the structure on the image side of the three-dimensional imaging lens when viewed along the optical axis of the three-dimensional imaging lens of this embodiment. Detailed Embodiment

[0026] Hereinafter, various exemplary embodiments, features, and aspects of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0027] The term "exemplary" used here means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments.

[0028] In addition, for a better description of the present invention, numerous specific details are given in the following detailed embodiments. Those skilled in the art should understand that the present invention can be implemented without some specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art are not described in detail so as to highlight the gist of the present invention.

[0029] In this embodiment, the three-dimensional imaging lens can be detachably mounted on the camera body of a lens interchangeable digital camera system, and is used to capture images with an angular difference for reproducing three-dimensional images (including both still images and moving images). The three-dimensional imaging lens includes, for example, a lens system for forming the optical image of the subject in different imaging regions respectively, a lens barrel, a lens mounting member detachably connected to the camera mounting member of the camera body, a protection member, and a glass plate disposed at the forefront of the three-dimensional imaging lens, etc.

[0030] Figure 1 It is a diagram showing the structure of the optical system and the light distribution of the three-dimensional imaging lens 2 without a wall member. Figure 2 It is a reference diagram showing the optical image formed on the imaging sensor through the optical system of the three-dimensional imaging lens without a wall member.

[0031] As Figure 1 shown, the three-dimensional imaging lens 2 includes a pair of lens systems 3L and 3R. In Figure 1In this case, each of the lens systems 3R and 3L is composed of a plurality of lens elements. The lens systems 3R and 3L have the same lens structure and are arranged side by side with their optical axes parallel to each other. When the stereo camera lens 2 is mounted on the camera body, the lens systems 3R and 3L are arranged in the left-right direction (the long side direction of the imaging sensor 1) of the camera body.

[0032] As Figure 1 shown, the optical axis 11 of the stereo camera lens 2 is parallel to the optical axes of the lens systems 3R and 3L, and passes through the center of the sensor 1 that forms the later-described photographic regions 4L and 4R, that is, Figure 2 the intersection of the diagonals of the imaging sensor 1 shown.

[0033] As Figure 1 and Figure 2 shown, the left lens system 3L forms an optical image 5L of the subject on the photographic region 4L in the left half of the imaging sensor 1, and the right lens system 3R forms an optical image 5R of the same subject on the photographic region 4R in the right half of the imaging sensor 1. The interval between the optical axes of the lens systems 3R and 3L is set to generate a prescribed parallax in the left and right photographic images.

[0034] Preferably, as Figure 2 shown, the photographic images formed by the lens system 3L and the photographic images formed by the lens system are quadrilaterals to effectively use the effective area of the imaging sensor 1. In order to obtain a quadrilateral photographic image, the optical image 5L formed by the lens system 3L becomes a circle covering the diagonal of the photographic region 4L, and the optical image 5R formed by the lens system 3R becomes a circle covering the diagonal of the photographic region 4R.

[0035] In the present embodiment, the lens systems 3L and 3R are arranged in the following positional relationship: the image circle formed by the lens system 3L overlaps both the photographic regions 4L and 4R, and the image circle formed by the lens system 3R overlaps both the photographic regions 4L and 4R. More specifically, the lens systems 3R and 3L and the imaging sensor 1 are arranged in the following positional relationship: the image circle formed by the lens system 3R on the imaging sensor 1 overlaps the image circle formed by the lens system 3L on the imaging sensor 1 at the central portion of the imaging sensor 1.

[0036] Here, although it is possible to perform electrical shielding on the unused portions of the imaging sensor 1 other than the photographic regions 4L and 4R so as not to use signals, in the portion where the optical image 5R in the portion 6L overlaps the photographic region 4L, the optical image 5R becomes noise, and in the portion where the optical image 5L in the portion 6R overlaps the photographic region 4R, the optical image 5L becomes noise.

[0037] It should be noted that Figure 1 the lens structures of the lens systems 3R and 3L in are merely illustrative, but those skilled in the art can understand that the present utility model should not be limited thereto. In fact, users can flexibly set the lens structures of the lens systems 3R and 3L according to personal preferences and / or actual application scenarios as long as three-dimensional imaging can be achieved.

[0038] Figure 3 FIG. is a diagram showing the structure and light distribution of the three-dimensional imaging lens 2 according to the present embodiment. Figure 4 FIG. is a diagram showing the wall member 7 and the imaging sensor 1 when viewed along the optical axis 11. Figure 5 FIG. is a schematic diagram showing that the wall member 7 rotates about the optical axis 11 by an operation of replacing a known lens when viewed along the optical axis 11.

[0039] As Figure 3 shown, the three-dimensional imaging lens 2 further includes a wall member 7 provided on the image side of the lens systems 3L and 3R, and the wall member 7 can block the light beam incident from the lens system 3L to the imaging area 4R and the light beam incident from the lens system 3R to the imaging area 4L. Specifically, the wall member 7 is provided behind the lens systems 3L and 3R and in front of the cover glass CG (or low-pass filter) for protecting the imaging sensor 1, and the wall member 7 blocks the light beam incident from the lens system 3L to the imaging area 4R and the light beam incident from the lens system 3R to the imaging area 4L to prevent the light beam emitted from the lens system 3L from entering the imaging area 4R and prevent the light beam emitted from the lens system 3R from entering the imaging area 4L, thereby preventing the overlap of two optical images.

[0040] As Figure 4 shown, when viewed along the optical axis 11, the long side length 7W of the wall member 7 is shorter than the short side length 1W of the image sensor 1. Thus, when the wall member 7 rotates as the three-dimensional imaging lens 2 rotates during the replacement of the three-dimensional imaging lens 2, the wall member 7 rotates between the lens systems 3L and 3R and the imaging sensor 1 in a manner that does not collide with the internal structure of the camera (such as a low-pass filter, a shake correction mechanism, etc.) as Figure 5 shown. Therefore, while ensuring miniaturization, it is also ensured that the wall member 7 does not interfere with the inside of the camera when the three-dimensional imaging lens 2 is replaced.

[0041] In addition, preferably, when viewed along the optical axis 11, the center of the imaging sensor 1 is located inside the wall member 7, that is, the optical axis 11 passes through the inside of the wall member 7, thereby ensuring that the distances between the wall member 7 and the surrounding components are not much different, and it is possible to further ensure that the wall member 7 does not interfere with the inside of the camera and miniaturization when the three-dimensional imaging lens 2 is replaced. In addition, more preferably, as Figure 4As shown, when observing along the optical axis 11, the center of the imaging sensor 1 coincides with the center of the wall member 7, that is, the optical axis 11 passes through the center of the wall member 7, thereby ensuring that the distances between the wall member 7 and the surrounding components are approximately equal, and further ensuring that the wall member 7 does not interfere with the inside of the camera and miniaturization when replacing the stereo camera lens 2.

[0042] Figure 6 is a sectional view of the camera S equipped with the stereo camera lens 2 along the cutting line shown by the arrow A. As Figure 6 shown, the camera S includes: a stereo camera lens 2 having lens systems 3L and 3R and a wall member 7, and a camera body 9 that can detachably mount the stereo camera lens 2 by means of a contact 17. The camera body 9 includes an imaging sensor 1 that receives the optical image formed by the lens systems 3R and 3L and converts it into an image signal, and a low-pass filter 8 provided in front of the imaging sensor 1.

[0043] In Figure 6 , the height (length in the direction along the optical axis 11) of the wall member 7 from the contact surface of the lens mounting member 10 with the camera body 9 is represented by 7H. In the present embodiment, the height 7H of the wall member needs to be a height that does not contact the low-pass filter 8 (or protective cover glass). That is, the height 7H of the wall member needs to be less than the mechanical back focus (MBF) 12 of the camera.

[0044] In addition, the lens may be mounted on different cameras, and the mechanical back focus may also vary depending on the camera. Therefore, it may be necessary to replace the wall member with a wall member suitable for the mechanical back focus of the camera when replacing the stereo camera lens. Alternatively, the height 7H of the wall member 7 may be less than the minimum value of the mechanical back focus of the cameras on which the stereo camera lens can be mounted, so as to avoid the trouble of selecting the wall member according to the mechanical back focus of the camera.

[0045] Figure 7 is a view showing the structure on the image side of the stereo camera lens 2 when observing along the optical axis 11. As Figure 7 shown, the wall member 7 is provided on the image-side portion of the housing of the stereo camera lens 2 by a screw member 13. The wall member 7 with a height suitable for the mechanical back focus 12 of the camera is replaced by removing and screwing in the screw member 13.

[0046] In addition, as Figure 8 shown, the lens mounting member 10 and the wall member 7 may be integrated, so that the lens mounting member 10 and the wall member 7 can be replaced simultaneously by removing and screwing in the screw member 13, thereby preventing the situation where the wrong wall member 7 is selected for the lens mounting member 10.

[0047] In the three-dimensional imaging lens and camera according to the present embodiment, by providing a wall member 7, which has a long side length shorter than the short side length of the image sensor 1, on a part of the three-dimensional imaging lens 2 on the image side of the lens systems 3L and 3R, for shielding the light beam incident from the lens system 3L into the imaging area 4R and the light beam incident from the lens system 3R into the imaging area 4L, it is possible to prevent the optical images formed by the two lens systems from overlapping when performing three-dimensional imaging. Further, when replacing the three-dimensional imaging lens, the wall member rotates between the lens system and the imaging sensor as the three-dimensional imaging lens rotates without interfering with the internal structure of the camera (such as a low-pass filter, a shake correction mechanism, etc.), and there is no need to further ensure a space for arranging the wall member, so that miniaturization of the entire camera can be ensured. The three-dimensional imaging lens of the present embodiment is easily applicable to an interchangeable lens digital camera.

[0048] In addition, in the above embodiment, the three-dimensional imaging lens 2 is used to form left and right optical images side by side on one imaging sensor 1. However, the three-dimensional imaging lens according to the present invention may also use two imaging sensors arranged side by side to form left and right imaging areas. A gap may be provided between the imaging areas of the two imaging sensors, and a pair of lens systems are configured to form optical images in the imaging areas of the pair of imaging sensors respectively. In this case, similarly to the above example, by providing a wall member 7, which has a long side length shorter than the short side length of the image sensor 1, on a part of the three-dimensional imaging lens 2 on the image side of the lens systems 3L and 3R, for shielding the light beam incident from the lens system 3L into the imaging area 4R and the light beam incident from the lens system 3R into the imaging area 4L, it is possible to prevent the left and right optical images from being mixed on each imaging sensor.

[0049] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A stereo camera lens capable of being attached to and detached from a camera body, wherein: include: a first lens system that forms an optical image of a subject in a first photographic area; as well as a second lens system arranged side by side with the first lens system so as to form an optical image of the object in a second photographic area; The first lens system and the second lens system are arranged in the following positional relationship: an imaging circle formed by the first lens system overlaps with both the first photographic area and the second photographic area, and an imaging circle formed by the second lens system overlaps with both the first photographic area and the second photographic area. The stereo camera lens further includes a wall component, which is disposed on the image side of the first lens system and the second lens system and is used to shield a light beam incident from the first lens system to the second photographic area and a light beam incident from the second lens system to the first photographic area. When viewed along the optical axes of the first lens system and the second lens system, the long side length of the wall member is shorter than the short side length of the imaging sensor forming the first photographing area and the second photographing area.

2. The stereo camera lens according to claim 1, characterized in that: The imaging sensor is centered within the wall member when viewed along the optical axes of the first and second lens systems.

3. The stereo camera lens according to claim 2, characterized in that: When viewed along the optical axes of the first lens system and the second lens system, the center of the imaging sensor coincides with the center of the wall member.

4. The stereo camera lens according to claim 1, wherein: The length of the wall member in the direction along the optical axes of the first lens system and the second lens system is smaller than a minimum value of a mechanical back focus of a camera on which the stereo camera lens can be mounted.

5. The stereo camera lens according to any one of claims 1 to 4, characterized in that: The wall member is provided at a portion of a housing of the stereoscopic imaging lens on the image side.

6. The stereo camera lens according to claim 5, characterized in that: It also includes a lens mounting member for connecting the stereo camera lens to the camera body in a detachable manner. The wall member is formed integrally with the lens mounting member.

7. A camera, characterized in that: include: The stereo camera lens according to any one of claims 1 to 6; as well as The camera body includes an imaging sensor that receives an optical image formed by the first lens system and the second lens system and converts the optical image into an image signal.

Images