WO2012128469A2

WO2012128469A2 - Camera having shift lens that shifts focusing points

Info

Publication number: WO2012128469A2
Application number: PCT/KR2012/000778
Authority: WO
Inventors: 이호준
Original assignee: 오앤아이(주)
Priority date: 2011-03-22
Filing date: 2012-02-01
Publication date: 2012-09-27
Also published as: WO2012128469A3; KR101068656B1

Abstract

The present invention relates to a camera having a shift lens that shifts focusing points which is applied to an industrial camera to resolve the limitations of a narrowed field of view even when using high magnification. In particular, by using a method of mounting a shift lens onto a conventional industrial camera, a camera is provided having a shift lens that shifts focusing points, which resolves the limitation of a narrowed field of view at a high magnification and moves two focusing points in a wide angle view to the center in order to capture an image.

Description

Camera with shift lens to shift focusing point

The present invention relates to a camera having a shift lens applied to an industrial camera to move the focusing point to solve the problem of narrowing the field of view while utilizing a high magnification. In particular, a shift lens for solving the problem of narrowing the field of view at high magnification by attaching a shift lens to a conventional industrial camera, and shifting a focusing point for grasping two focusing points in a wide field of view and moving them to the center portion can be taken. It is about a camera that has.

In general, an industrial camera is a precision device used to photograph a connection part of an object or an article to be manufactured, and to observe whether the connection part is connected correctly or the movement for the connection is correct through the photographing.

Unlike general cameras, industrial cameras have a fixed focus or magnification, so they should always capture a fixed position and a fixed range. That's because cameras are always best suited to shoot fixed points at fixed locations in the electronics manufacturing process, and to ensure that uniform work is performed perfectly. .

In particular, automated equipment requires ultra-precise work in slimming (thinning) products and connecting and joining parts and components in the production of products, and therefore requires high alignment accuracy. Doing. In addition, in order to shorten the overall production time in order to improve the overall production yield, the equipment size and volume of each section are reduced to reduce the travel time between operations. Of course, in order to achieve this, each related equipment is inevitably miniaturized.

Furthermore, in order to increase the alignment and improve the accuracy of the work, it is important to observe the lens more accurately by increasing the magnification of the lens. Conventionally, a high magnification lens, a high resolution lens, and a high resolution camera are used. The more precise and finer the alignment, the more the connection works. However, the following problems occur in utilizing such a high magnification and high resolution photographing technology.

When a high magnification camera is installed and used to increase the degree of alignment, the field of view by the camera, that is, the field of view (FOV), is reduced. In particular, in the case of an industrial camera that can not achieve the improvement of the field of view and magnification by adjusting the distance between the lenses, unlike the general camera, this technical matter is a serious problem. Industrial cameras that always have a fixed lens and always shoot a fixed position can only shoot the exact position where the lens is fixed, since the lens adjustment is impossible. Of course, adding a separate thick lens and installing another camera may be used to improve the field of view, but adding a separate lens to an already fully systemized production facility will cause interference. In addition, it is not possible to attach two cameras within the center of the measuring point.

Therefore, it is not possible to increase the magnification at a desired magnification, and thus, the learner decides to learn according to the viewing area, and in fact, it is often impossible to use the intended degree of alignment. In more detail, FIG. 8 is the largest field of view that any camera can capture. In other words, the camera you are using now can only shoot and observe this field of view. However, when a camera having a high magnification is purchased for more precise work, there is no choice but to secure a narrow field of view compared to this field of view. Of course, there is no problem if the location where the work is done is within the range where all the photographing can be achieved even with a narrower viewing area through high magnification. However, if the position outside the narrow field of view is an important position for the work, this camera becomes useless and the problem is that another camera must be installed.

The present invention is to provide a camera having a shift lens that is applied to an industrial camera to move the focusing point to solve the problem of narrowing the field of view while utilizing a high magnification.

That is, the present invention solves the problem of narrowing the field of view at high magnification by attaching a shift lens to a conventional industrial camera, and shifting the focusing point to grab two focusing points from a wide angle of view and move them to the central part. It is intended to provide a camera with a shift lens.

According to the present invention, a camera having a shift lens for moving a focusing point includes: a lens unit having a plurality of lenses; A camera 70 having an image sensor 79 fastened to the end of the lens portion; And a shift lens 50 having two reflecting prisms 51 to move the images of the left and right ends of the subject 10 transmitted from the lens to the central portion. , To precisely photograph the two zones.

Also in accordance with a camera having a shift lens for moving the focusing point of the present invention, the shift lens 50 is coupled to a connection with the camera 70, which is the end of the lens portion: the shift lens 50 is formed at the center, Insert a metallic blocking block 52 that supports the prism in a triangular cross section, and sets two reflective prisms 51 to the left and right sides in accordance with the tapered outer circumferential surface of the blocking block 52, so that the light is introduced into the prism inlet. Reflecting and moving toward the center portion of the shift lens 50 to form an image in the region of the sensor 79: the blocking block 52 and the reflecting prism 51 are brought into close contact with each other through the adhesive 53. .

In addition, the adhesive block 53 of the blocking block 52 and the reflecting prism 51 according to the camera having the shift lens for moving the focusing point of the present invention is a reflecting coating material: in the direction of the light traveling in the reflecting prism 51. The outer portion of the tapered surface is a reflective coating 54: the shift lens 50 comprises a blocking lens 52 and a shift lens housing 57 surrounding the reflective prism 51 to be packaged.

In addition, according to the camera having a shift lens for moving the focusing point of the present invention, the shift lens 50 including the shift lens housing 57 has a screw portion protruding to one side to the circular body 61 according to the diameter of the lens portion ( Housed inside the adapter 60 having a 62, so that the lens unit and the camera 70 can be connected: a separate flat plate lens 80 corresponding to one reflective prism 51 is padded on the lens unit. For example, it is possible to photograph an image having substantially different focal lengths: The flat lens 80 may be inserted immediately before the shift lens 50, which is the first end of the lens unit or the end of the lens unit.

In addition, according to the camera having a shift lens for moving the focusing point of the present invention, the lens portion is made of a combination of the object-side imaging lens 20, the image-side imaging lens 40: the object-side imaging lens 20 and the image side The beam splitter 30 is inserted into the middle of the imaging lens 40.

According to the present invention, it is possible to secure a wider field of view and to obtain an image with high magnification and high efficiency, and thus there is an advantage that the degree of alignment can be increased.

In addition, according to the present invention, there is an advantage that the utilization of the two cameras can be photographed through one camera can be used.

In addition, according to the present invention, although one focus is focused, since the flat lens can be used separately, which can focus two focuses, there is an advantage in that the photographing of the curved surface is also advantageous.

1 is a view showing a state that the light is bent and reflected through the shift lens of the present invention,

2 is a view comparing the field of view of the present invention with a conventional field of view;

3 is a view showing a shift lens of the present invention;

4 is a view showing a shift lens coupled to the camera module of the present invention;

5 is an exploded view showing the camera of the present invention as a whole;

6 is a view showing a state of photographing the flexion according to the present invention,

7 is a view showing a state photographed through a general industrial camera,

8 is a view showing a state photographed through the camera of the present invention.

The present invention relates to a shift lens for securing a wider field of view. Therefore, the configuration of the present invention and its operation will be described in detail with reference to FIGS. 1 to 8.

As shown, the present invention has a lens unit having a plurality of lenses, a camera 70 having an image sensor 79 is fastened to the end of the lens unit, built in two reflective prisms 51, and transmitted from the lens There is a shift lens 50 for moving the left and right ends of the subject 10 to the central portion. Therefore, while shooting a wide field of view through them, it is to accurately capture the two zones.

In order to describe the present invention in more detail, the problems of the existing camera, the form of its use, and the method of utilizing the shift lens will be described first.

Table 1 is a table listing the development process of the present invention.

Table 1

That is, in the case of an industrial camera as shown in this table, a method of increasing the resolution of the image sensor 79 and a method of increasing the magnification of the lens are used to increase the degree of alignment thereof. That is, when the magnification of the lens is increased to increase the degree of alignment, an unavoidable problem arises that the field of view that the camera can photograph is narrowed.

In the table, "1" shows the photographing information of the standard camera, and it was concluded that the unusual point in the photographing state using the lens of 1 magnification was low degree of vision. That is, detailed observation is difficult. To solve this problem, if the magnification of the lens is increased, the degree of vision is increased but the field of view is reduced.

Therefore, we replaced the camera with a high resolution camera, tried the existing 1x magnification lens, and experimented with the embodiment using the camera and the high resolution lens. Both come with problems. That is, the lens resolution does not follow the resolution of the camera, due to the use of a high-resolution lens has caused a problem of severe space constraints.

In particular, the embodiment using a high resolution camera and increasing the magnification causes a problem that the field of view is narrowed although the degree of vision is increased.

After all, the technical problems of the existing industrial cameras and the main points shown in the above table are as follows.

First, in the case of an industrial camera, since the distance between the lenses cannot be adjusted, the magnification of the magnification is only a direction in which a separate lens is fastened and the aperture of the lens is widened. This brings about spatial constraints.

Secondly, finding a method and increasing the magnification of the lens narrows the field of view, causing the need to mount two cameras for any shooting.

The shift lens 50 of the present invention is mounted on the camera 70, and has come up with the following solution. You can get the vision you want and move it to the location you want to see. As a result, a wide viewing angle was obtained while achieving magnification of magnification.

Such technical solutions will now be described with reference to FIGS. 1, 2, 7 and 8.

The conventional camera described above has a constant field of view as in FIG. This is shown in Figure 2 is a diagram of (a). If a picture is taken using a lens of 1 magnification, the actual viewable area will be the area of the shaded portion. However, when the magnification lens is used twice in this camera, the field of view is greatly reduced as shown in FIG. Problems arise at this time. If the subject 10 is an important part that the camera must photograph for the production of electronic products, then this part cannot be photographed with a camera that has actually been enlarged by two magnifications. In order to photograph this, only one of two subjects outside the area is selected and photographed, and the other one must be photographed through another camera.

The present invention solves this problem, it is solved by a simple method of making the shift lens 50 separately to be mounted on the existing camera 70.

The present invention divides the image of the subject transmitted from the lens unit (long and short lens body mounted on an industrial camera; a special code is omitted) by using two reflective prisms 51 as shown in FIG. And separate and move toward the image sensor 79. As a result, as the magnification of the lens increases, the viewing angle thereof becomes smaller. However, as shown in (c) of FIG. 2, only the subjects widened on the left and right ends are photographed to form an image on the image sensor 79.

This content will be described with reference to FIG. 1 as follows. When the image of the subject 10 is transmitted to the light by passing through the lens of a conventional industrial camera that is being used, the shift lens 50 is received. In the shift lens 50 of the present invention, two reflective prisms 51 are mounted so that only a part of light can be received as shown in FIGS. 1 and 3. In FIG. 1, light entering the portion defined as “B” does not pass through the prism and disappears. Only light entering the "K1" and "K2" areas outside the "B" area is incident to the image sensor 79 through the reflecting prism (51).

In this case, the light passing through the reflective prism 51 is bent and bent, as shown in FIG. 1, to form an image on the image sensor 79 while the image moves to the center portion. As a result, the shift lens 50 of the present invention injects only the images of the subjects 10 at the left and right ends into the reflection prisms 51 "K1, K2" region, and shifts them by bending and reflecting them to the center, and the image sensor 79 ), Only the K1 and K2 areas should be awarded. In FIG. 2C, the shape is illustrated, and in FIG. 8, a diagram in which the image having such an image is taken is illustrated.

Since the shift lens 50 of the present invention is to bend the light and move to the center, it can be used in various ways and positions. However, the shift lens 50 is preferably coupled to the connection portion with the camera 70, which is the end of the lens portion.

In the illustrated drawings illustrating the present invention, all of them are mounted at the end of the lens portion, and this embodiment is most preferred. Mounting between the camera 70 and the lens unit can be combined to form the most effective and accurate two images.

This will be described in detail with reference to the drawings the more detailed configuration and its operation of the present invention.

The shift lens 50 used in the present invention is formed at the center portion, and inserts a metal blocking block 52 that supports a prism in a triangular cross section and is left and right in accordance with a tapered outer peripheral surface of the blocking block 52. It is preferable to raise two reflection prisms 51 on both sides so that the light injected from the introduction portion of the prism is reflected and moved toward the center portion of the shift lens 50 to form an image in the area of the sensor 79.

3 shows an embodiment of the shift lens 50 according to the present invention, which is shown in (a) in its most basic form. That is, it is a shift lens 50 having two reflective prisms 51 which form a triangular blocking block 52 for blocking the passage of light in the central part and adheres to the tapered surface of the blocking block 52. . The blocking block 52 absorbs light and prevents light from being transmitted in the direction of light propagation, and the left and right reflective prisms 51 transmit and reflect the light introduced into the area of the inlet, thereby allowing the image sensor ( 79) to win a prize.

At this time, the light passing through the reflection prism 51 is naturally moved to the central portion to form an image, so that a small field of view can be taken, but a substantially wider field of view.

The blocking block 52 made of metal is blackish metal or has a black coating. The blocking block 52 is most preferable when the incoming light is naturally removed without scattering. If light and scattered light entering the outer portion of the blocking block 52 are generated, there is a concern that the sharpness of the image to be formed on the image sensor 79 may be disturbed. Therefore, the blocking block 52 must be manufactured using black metal or coated with black. Light passing through the lens unit is completely absorbed and blocked through the blocking block 52 to form the most effective image.

In addition, as shown in FIG. 3, the blocking block 52 and the reflecting prism 51 are preferably tightly coupled to each other through the adhesive 53, and the adhesive 53 of the blocking block 52 and the reflecting prism 51 is preferable. ) Is preferably a reflective coating material.

The blocking block 52 and the reflective prism 51 are adhered through the adhesive 53. The blocking block 52 is metallic, and the reflecting prism 51 is glass. It is most desirable to have a material that can be in close contact with each other so as not to be vibrated and at the same time completely block the mutual transmission of light.

In other words, it is better not to harm the reflection of the reflective prism 51. To this end, the adhesive 53 of the present invention is preferably a material capable of reflecting at the same time as the adhesive.

Also, as shown in FIG. 3, the outer portion of the tapered surface in the traveling direction of the light in the reflective prism 51 is preferably reflective coated 54. Since the light passes through the part facing each other at right angles, light should be passed through it as it is, and it should be anti-reflective coating, and total reflection coating should be performed on the reflective surface to perform the reflectivity of the prism more effectively.

Furthermore, the main object of the present invention is a shift lens 50 to be used as it is without modification to the existing industrial camera 70 and the lens used. Therefore, it is most preferable to package the shift lens 50 of the present invention. That is, the shift lens 50 includes a shift lens housing 57 surrounding the blocking block 52 and the reflective prism 51 to package.

In FIG. 3B, such a shift lens 50 is illustrated. The shift lens 50 is coupled to the shift lens housing 57 that couples the blocking block 52 and the reflective prism 51 into one lens. That's the way. It is sufficient if it is not a special form but a cylindrical shape that can be simply inserted into the lens unit.

Furthermore, the adapter 60 may be provided to surround the outside of the shift lens housing 57 to be coupled to the lens unit and the connection portion of the camera 70. That is, the shift lens 50 including the shift lens housing 57 is accommodated inside the adapter 60 having the threaded portion 62 protruding to one side to the circular body 61 adapted to the diameter of the lens portion. The lens unit and the camera 70 can be connected.

4 and 5, an adapter 60 having a groove for accommodating the shift lens 50 including the shift lens housing 57 is used. The adapter 60 has a circular body as shown, and has a threaded portion 62 protruding to one side. The screw part 62 is used to fasten the existing camera 70. In the case of a general camera, it is screwed with the lens part, and this fastening is achieved through the screw part 62 of the adapter 60. And the other side is a method of forming a screw (not shown) on the inner circumferential surface to be screwed with the lens.

In addition, the main feature of the present invention is that it is possible to shoot two separate areas with a single shooting, and by taking a picture of the separated areas, it is possible to shoot in a form having a different focus. That is, a separate flat plate lens 80 corresponding to one reflective prism 51 is attached to the lens unit so that images having substantially different focal lengths can be photographed.

As shown in Fig. 2, when photographing the subject 10 away from the distance "a", if both subjects 10 are curved concave and convex portions, the distance between them does not match, which part is clear and which part There is a lot to be clear. However, the present invention can control this.

FIG. 6 illustrates such a drawing in detail. FIG. 6A illustrates a viewing area photographed through a conventional camera 70, and FIG. 6B illustrates the camera 70 of the present invention. It is a figure which shows the visual field image | photographed through. 6 (c) shows a state in which the flat plate lens 80 is photographed with one side for photographing a bent portion and an uneven portion, which are portions having a different distance from each other. According to the present invention, the flat lens 80 can be used well to more effectively accurately focus on portions of different distances such as irregularities.

The flat plate lens 80 may be inserted directly in front of the shift lens 50, which is the first end of the lens unit or the end of the lens unit. As shown in (c) of FIG. 6, the lens unit may be inserted at the first end of the lens unit or may be inserted at the end of the lens unit and the connection portion of the camera 70.

The camera of the present invention is applicable to all types of industrial cameras and lenses that are generally used. That is, the lens unit used in the present invention is a combination of the object-side imaging lens 20, the image-side imaging lens 40. As shown in FIG. 5 and FIG. 6 shown as partitioning the lens unit, a lens unit in which the object side imaging lens 20 and the image side imaging lens 40 are combined with each other may be utilized.

In addition, a lens unit in which the beam splitter 30 is inserted may be used in the middle of the object side imaging lens 20 and the image side imaging lens 40 used in a special case. The beam splitter 30 is a tool for advancing separate light from the inside of the lens unit to the subject 10 and photographing the reflected subject light again. It is a mechanism that makes it possible to express the shape or outline of a special part to be photographed by adding or subtracting light more clearly.

Claims

A lens unit having a plurality of lenses;

A camera 70 having an image sensor 79 fastened to the end of the lens portion; And

Built-in two reflection prisms 51, the shift lens 50 for moving the left and right both ends of the subject (10) transmitted from the lens to the central portion; and comprises a whole to shoot the angle of view, the A camera having a shift lens for moving a focusing point, characterized by photographing two zones of the angle of view.
The method of claim 1,

The shift lens (50) is a camera having a shift lens for moving the focusing point, characterized in that coupled to the connection with the camera 70, the end of the lens portion.
The method according to claim 1 or 2,

The shift lens 50

A metal blocking block 52 is formed in the center and has a triangular cross section to support the prism, and two reflective prisms 51 are formed on the left and right sides in accordance with the tapered outer peripheral surface of the blocking block 52. A camera having a shift lens for moving a focusing point, characterized in that the light injected from the introduction portion is reflected and moved toward the central portion of the shift lens (50) to form an image in the area of the sensor (79).
The method of claim 3,

The blocking block 52 and the reflecting prism 51, the camera with a shift lens for moving the focusing point, characterized in that the close contact with the adhesive (53).
The method of claim 4, wherein

A camera having a shift lens for moving a focusing point, characterized in that the blocking block 52 and the adhesive 53 of the reflective prism 51 are reflective coating materials.
The method of claim 3,

A camera having a shift lens for moving the focusing point, characterized in that the outer portion of the surface tapered in the direction of light propagation in the reflection prism (51).
The method of claim 3,

The shift lens (50) comprises a shift lens housing (57) surrounding the blocking block (52) and the reflecting prism (51) and packaged.
The method of claim 7, wherein

The shift lens 50 including the shift lens housing 57 is housed inside the adapter 60 having the screw portion 62 protruding to one side to a circular body 61 adapted to the diameter of the lens portion, and the lens portion And a camera having a shift lens for moving the focusing point, characterized in that the camera 70 can be connected.
The method of claim 3,

In the lens unit, a shift lens for shifting the focusing point is characterized in that a separate flat lens 80 corresponding to one reflective prism 51 is padded so that an image having a substantially different focal length can be photographed. With camera.
The method of claim 9,

The flat lens (80) is a camera having a shift lens for moving the focusing point, characterized in that it can be inserted in front of the shift lens 50, which is the first end of the lens portion or the end of the lens portion.
The method of claim 1,

The lens unit is a camera having a shift lens for moving the focusing point, characterized in that the combination of the object-side imaging lens 20, the image-side imaging lens (40).
The method of claim 11,

A camera having a shift lens for moving the focusing point, characterized in that the beam splitter 30 is inserted between the object side imaging lens 20 and the image side imaging lens 40.
The method of claim 3,

The metal blocking block 52 is a camera having a shift lens for moving a focusing point, characterized in that it is black in metal or has a black coating.