JPH09281614A - Stereoscopic image photographing auxiliary optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic image photographing auxiliary optical device which is compact, light weight and having no stereoscopic image photographing lens at all. SOLUTION: This device possesses a pair of reflection mirror surfaces 7 and 8 disposed in a nearly reverse truncated chevron state in terms of plan view to an object and capable of reflecting the object on respective opposed surfaces, and is provided with a pair of turning bodies 10 and 11 rotating freely attachable and detachable by a supporting point and a pair of second reflection mirrors provided between the turning bodies 10 and 11 reflecting the respective images of the object reflected through the reflection mirror surfaces of the turning bodies 10 and 11 to the lens 19 of a camera set on a rear side between the turning bodies 10 and 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary optical device for photographing a stereoscopic image, more specifically, by mounting the auxiliary optical device in front of a photographing lens having various angles of view of a photographing device such as a single-lens reflex camera or a video camera. The present invention relates to an auxiliary optical device for stereoscopic image capturing, which can easily capture a stereoscopic image of a subject with a single camera.

[0002]

2. Description of the Related Art Conventionally, as an auxiliary optical device for photographing a stereoscopic image, there is known a so-called stereo camera for photographing the same subject from a position separated by a constant distance and taking two pictures. . A conventional auxiliary optical device for stereoscopic image pickup is one camera body provided with two photographing lenses having the same angle of view at a fixed distance. By observing each of the two photographs at the same time, it can be seen as one stereoscopic photograph.

[0003]

In the auxiliary optical device for photographing a stereoscopic image, when a subject is photographed as one stereoscopic image as described above, a stereo camera having the above-mentioned configuration is purchased. However, the most common type of camera in recent years is a single-lens reflex camera, in which various lenses with different angles of view are removable, and if you purchase a stereo camera separately, it is not only economical but also a shooting lens. However, the weight and bulk of the body of the stereo camera having two units are serious problems when carrying the camera, and it is required to reduce the weight and size.

The present invention is not limited to a single-lens reflex camera in which the focusing of an object through a mounting lens can be clearly confirmed with a viewfinder, but can also be mounted in front of a shooting lens of various video cameras having different angles of view. , A very compact and lightweight lens that can easily shoot a subject as a stereoscopic image corresponding to the angle of view of the mounted lens with various handheld cameras or video cameras An object of the present invention is to provide an extremely excellent auxiliary optical device for stereoscopic image capturing, which does not have at all.

[0005]

In order to solve this problem, the present invention provides a pair of objects which are arranged in a substantially inverted C-shape in plan view and which are capable of projecting the object on their respective facing surfaces. A pair of rotating bodies that have a first reflecting mirror surface, and that rotate so as to come into contact with and separate from each other by a fulcrum, and that are provided between the rotating bodies and are reflected via the first reflecting mirror surface of each of the rotating bodies. A pair of second reflecting mirror surfaces for reflecting the respective images of the subject to the space between the rotating bodies are arranged in a substantially V shape in plan view with respect to the subject, and further, the respective contact portions of the second reflecting mirror surfaces are arranged. However, it is configured such that it can be attached to the camera so that it is located on the central optical axis of the lens of the camera.

As a result, the subject can be easily converted into a stereoscopic image corresponding to the angle of view of the attached lens by simply attaching the subject in front of the taking lens of various angle of view of the various video cameras. It is possible to obtain an auxiliary optical device for taking a stereoscopic image which is extremely compact and lightweight for taking an image, and which has no taking lens for stereoscopic image at all.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) The invention according to claim 1 of the present invention is a pair of first and second objects arranged in a substantially inverted C shape in plan view, and capable of projecting the object on respective facing surfaces. A pair of rotating bodies that have one reflecting mirror surface and that rotate so that they can freely come in contact with and separate from each other by using the respective closest end sides as fulcrums, and the reflecting mirror surfaces of the rotating bodies that are provided between the rotating bodies. A pair of second reflecting mirror surfaces that reflect each of the reflected images of the subject into the space between the rotating bodies are viewed in plan view as V with respect to the subject.
Arranged in a letter shape, and the respective contact portions of the second reflecting mirror surface are
It is constructed so as to be located on the central optical axis of the lens of the photographing device which is positioned rearward from the fulcrum on the end side of the first reflecting mirror surface, and also has a photographing lens for stereoscopic vision at all. Since it is not so compact and lightweight, it is mounted not only on a single-lens reflex camera that can clearly check the focus of the subject through the mounted lens with a viewfinder, but also on the front of a shooting lens of various video cameras with different angles of view. Only by doing so, it is possible to easily shoot a subject as a stereoscopic image corresponding to the angle of view of the mounted lens with various cameras, video cameras, etc. on hand.

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing the internal structure of an embodiment of an auxiliary optical device for stereoscopic image capturing according to the present invention. In FIG. 1, 1 is an auxiliary optical device main body case, and 2 is the main body case 1. An adjustment knob that is reciprocally movable on the upper surface and along an oblong guide hole 3 formed in the front-back direction of the main body case 1 is shown, and 4 is a window formed in the rear surface portion of the main body case 1. Indicates a hole.

In the body case 1, a desired object 15 is arranged in front of the body case 1 with a predetermined distance, and is arranged in an inverted inverted V shape in a plan view. A support shaft having a pair of first reflecting mirror surfaces 7 and 8 capable of projecting the subject 15 on the respective facing surfaces, and the end sides 10b and 11b closest to each other being fixed to the main body case 1. 12 and 13 are pivotally supported and each end side 10
b and 11b as a fulcrum, a pair of rotary bodies 10 and 11 which rotate freely (arrow A) and are provided between the rotary bodies 10 and 11, and the reflecting mirror surfaces 7 and 8 of the rotary bodies 10 and 11 respectively. Each of the images of the subject 15 reflected via the pair of second members arranged in a substantially V-shape in plan view with respect to the subject 15 so as to be reflected between the rotating bodies 10 and 11. And a reflecting mirror surface fixing base 9 to which the reflecting mirror surfaces 5 and 6 are fixed.

Further, arm bodies 10a and 11a for transmitting drive are respectively formed above the end portions 10b and 11b of the pair of rotating bodies 10 and 11 with a predetermined angle, and the reflecting mirror surface fixing base 9 is provided. And the elliptical holes 10c and 11c are formed at the tip ends of the respective arm bodies 10a and 11a, and the elliptic holes 10c and 11c are provided on the adjusting knob 2. The sliding shaft 14 thus inserted is inserted.

Reference numerals 17 and 17a denote windows for taking in the image of the subject 15 on the first reflecting mirror surfaces 7 and 8 provided on the rotating bodies 10 and 11, respectively, and 18 is a main body case having the above-mentioned configuration. 1 shows a fixed body for attaching and fixing 1 to the camera shown by the broken line in FIG. In addition, the abutting portions 16 of the second reflecting mirror surfaces 5 and 6 are provided on the fixed body 18, and the first reflecting mirror surfaces 7 and 8 are provided via the fixing body 18.
2 is composed of a mounting means that can be positioned on the central optical axis a of the lens 19 shown by the alternate long and short dash line in FIG.

FIG. 2 is a diagram showing an optical function of the present apparatus. In FIG. 2, a lens 19 is a lens of a photographing device or the like shown by a broken line in FIG. It has a distance f. Reference numeral 20 denotes an image pickup surface such as a film or a CCD of the image pickup device, and the image pickup surface has a width of W dimension.

Further, a in the one-dot chain line a, b, c indicates the central optical axis of the lens 19, and the second optical axis is on the central optical axis a.
The contact portions 16 of the reflecting mirror surfaces 5 and 6 are positioned. That is, this state shows a state in which the image reflected on the second reflecting mirror surfaces 5 and 6 is distributed to the center of the image pickup surface 20 to be picked up, and the alternate long and short dash lines b and c indicate the central optical axis a.
Is a parallel light ray with a certain distance to, and a light ray parallel to the alternate long and short dash line b is imaged at the position m of the image pickup surface 20 via the reflecting mirror surfaces 8 and 6 and the lens 19, and similarly, the alternate long and short dash line c
A light beam parallel to is imaged at the position n on the imaging surface 20.

Therefore, by setting the positions m and n of the light rays b and c on the image pickup surface 20 at a distance of 1/4 W from the central optical axis a, images of the same subject viewed from different positions can be obtained. You can shoot from left to right from the center of
The condition is that θ1 is determined by the condition of the photographing device from the figure and θ1 = tan ⁻¹ W / (4f). Next, θ2-θ
The purpose is achieved by establishing the relationship of 3 = θ1 / 2.
At this time, θ2-θ3 are narrow angles and acute angles of the reflecting mirror surfaces facing each other.

Therefore, when the camera shown by the broken line in FIG. 1 is a single-lens reflex camera or a video camera, the images viewed by the respective viewfinders and the captured image are the same, and the adjustment knobs while viewing the image of the viewfinder. 2 is reciprocally moved and adjusted so that the same image of the subject can be seen on the left and right,
= Θ1 / 2 is established, and when a photograph is taken in this state, a stereoscopic image is projected on the image pickup surface 20 of the photographing device.

[0016]

As described above, according to the present invention, not only a single-lens reflex camera capable of clearly confirming the focus of a subject through a mounting lens with a viewfinder, but also various video cameras having different angles of view can be used. It is extremely compact and lightweight because you can easily shoot a subject as a stereoscopic image corresponding to the angle of view of the mounted lens by simply mounting it in front of the lens with various handheld cameras, video cameras, etc.
Moreover, there is an advantageous effect that it is possible to provide an extremely excellent auxiliary optical device for stereoscopic image capturing, which does not have a stereoscopic image capturing lens at all.

[Brief description of drawings]

FIG. 1 is a plan view disclosing an internal mechanism of an embodiment of an auxiliary optical device for stereoscopic image capturing according to the present invention.

FIG. 2 is an explanatory view illustrating an optical action of the auxiliary optical device for stereoscopic image capturing according to the present invention.

[Explanation of symbols]

 1 main body case 2 adjustment knob 3 guide hole 4 window hole 5 second reflecting mirror surface 6 second reflecting mirror surface 7 first reflecting mirror surface 8 first reflecting mirror surface 9 reflecting mirror surface fixing base 10 rotating body 11 rotating body 12 spindle 13 support shaft 14 sliding shaft 15 subject 16 present portion 17 window portion 18 fixed body 19 lens

Claims (1)

[Claims] 1. A pair of first reflecting mirror surfaces, which are arranged in a substantially inverted C shape in plan view with respect to a subject, and have a pair of first reflecting mirror surfaces capable of projecting the subject on their respective facing surfaces, and can be freely separated by a fulcrum. And a pair of second rotating bodies that are provided between the rotating bodies and that reflect each of the images of the subject reflected through the reflecting mirror surfaces of the rotating bodies.
The reflecting mirror surface of the second reflecting mirror surface is arranged in a substantially V shape in plan view with respect to the subject, and the abutting portions of the second reflecting mirror surface are positioned on the central optical axis of the lens of the photographing apparatus. Auxiliary optical device for stereoscopic image capturing that can be mounted.