CN101634550B - Eccentricity detecting device - Google Patents

Abstract

The invention provides an eccentricity detection device, which includes a connecting device, an eccentricity detector and a bearing device. The carrying device is used for carrying the object to be detected. The connecting device has opposing first and second ends. The first end is connected to the eccentricity detector, the second end is connected to the carrying device, at least one of the connection between the first end and the eccentricity detector or the connection between the second end and the carrying device is a rotational connection, The eccentricity detector and the carrying device can rotate relatively around the central axis of the connecting device, so that the eccentricity detector can detect the object to be detected carried on the carrying device. The eccentric detection device improves detection accuracy.

Description

Eccentricity detection device

technical field

The invention relates to an eccentricity detection device, in particular to an eccentricity detection device for detecting the eccentricity of a lens.

Background technique

With the rapid development of multimedia technology, digital cameras (seeing Capturing images with digital still cameras, Micro, IEEE Volume: 18, issue: 6, Nov.-Dec.1998 Page (s): 14-19), video cameras and cameras with Mobile phones with cameras are more and more popular among consumers. While people put forward higher requirements for the image quality of objects shot by digital cameras, video cameras and mobile phone cameras, the demand for products such as digital cameras, video cameras and mobile phones with cameras is also increasing. is increasing. In photographic devices such as digital cameras, video cameras and mobile phone cameras, the lens is an indispensable part.

As an important part of the lens, the lens plays a key role in the imaging quality of the entire lens. After the lens is molded, ground and polished, its optical axis tends to deviate from its geometric central axis. This phenomenon is called eccentricity. Theoretically, the eccentricity of the lens can be divided into two types, one is the parallel translation of the optical axis and the geometric center, and the other is the intersection of the optical axis and the geometric center of the lens, but in fact the eccentricity of the lens is usually a combination of these two eccentricities.

There are many traditional lens eccentricity measurement methods. One of the lens eccentricity measurement methods first uses a collimator to measure the first center of curvature of the lens. Secondly, rotate the lens around the central axis of the collimator, and then use the collimator to measure the second center of curvature of the lens, and repeat the above operations, so as to measure the center of curvature of the lens when the lens is in different positions relative to the collimator. The eccentricity of the lens can be obtained after geometric conversion based on the center of curvature of the lens measured by multiple rotations. However, in the process of rotating the lens, the rotation axis of the lens may deviate from the central axis of the collimator due to uneven force, so that the center of curvature of each measurement is not obtained with the same rotation axis, resulting in deviations in measurement results .

Contents of the invention

Therefore, it is necessary to provide an eccentricity detection device, so as to avoid the problem of offset of the rotation center and improve the accuracy of the measurement result.

An eccentricity detection device will be described below with an embodiment.

An eccentricity detection device comprises a connecting device, an eccentricity detector and a carrying device. The carrying device is used for carrying the object to be detected. The connecting device has opposing first and second ends. The first end is connected with the eccentricity detector, and the second end is connected with the carrying device. At least one of the connection between the first end and the eccentricity detector or the connection between the second end and the carrying device is a rotational connection, so that the eccentricity detector and the carrying device can rotate relatively around the central axis of the connecting device, thereby providing eccentricity The detector detects the object to be detected carried on the carrying device.

Compared with the prior art, the eccentricity detection device connects the eccentricity detector and the carrying device through the connecting device, so that when the eccentricity detector and the carrying device rotate relative to each other, they always keep rotating with the central axis of the connecting device as the rotation axis, avoiding The offset problem of the rotating shaft during the rotation process improves the accuracy of the measurement results.

Description of drawings

Fig. 1 is an exploded view of the eccentricity detection device provided by the first embodiment of the technical solution.

Fig. 2 is a schematic structural diagram of the eccentricity detection device provided by the first embodiment of the technical solution.

Fig. 3 is a cross-sectional view of the eccentricity detection device provided by the first embodiment of the technical solution.

Fig. 4 is a cross-sectional view of the eccentricity detection device provided by the second embodiment of the technical solution.

Detailed ways

The eccentricity detection device provided by the technical solution will be further described in detail below with reference to the drawings and multiple embodiments.

Referring to FIG. 1 to FIG. 3 , the eccentricity detection device 10 provided by the first embodiment of the technical solution includes a connecting device 11 , an eccentricity detector 12 and a carrying device 13 . The connection device 11 is connected to the eccentricity detector 12 and the carrying device 13 .

The connecting device 11 has a first end portion 111 and a second end portion 112 oppositely disposed. The first end 111 is connected to the eccentricity detector 12, and the second end 112 is connected to the carrying device 13, so that the eccentricity detector 12 is directly opposite to the carrying device 13, and can rotate relatively around the central axis of the connecting device 11, so that The eccentricity detector 12 detects the object to be detected carried on the carrying device 13 . The first end portion 111 and the second end portion 112 can be rotatably connected with the eccentricity detector 12 and the carrying device 13 respectively, or only the first end portion 111 can be rotatably connected with the eccentricity detector 12 or only the second end portion 112 can be rotatably connected with the carrying device 13. The device 13 is rotatably connected. In this embodiment, only the second end portion 112 is rotatably connected to the carrying device 13 . Specifically, the connecting device 11 is a cylinder, which is provided with a receiving through hole 113 passing through the first end 111 and the second end 112, for accommodating the eccentricity detector 12 and the carrying device 13, so that the eccentricity detector 12 and The carrying devices 13 are connected by the connecting device 11 and arranged along the central axis of the receiving through hole 113 . In addition, the receiving through hole 113 is also convenient for the detection light of the eccentricity detector 12 to pass through and reach the carrying device 13 for detection. The central axis of the receiving through hole 113 is the central axis of the connecting device 11 . Preferably, the accommodating through hole 113 is a stepped through hole, the diameter of which near the first end 111 is smaller than the diameter of the second end 112 , and is respectively used for connecting with the eccentricity detector 12 and the carrying device 13 . The connecting device 11 has an inner side 114 . The inner side 114 is fixedly connected to the eccentricity detector 12 near the first end 111 . The inner surface 114 defines a first rolling groove 115 close to the second end portion 112 . The first rolling groove 115 is an annular groove perpendicular to the central axis of the receiving through hole 113 . The first rolling groove 115 is provided with a ball 116 that can roll in the first rolling groove 115 for cooperating with the eccentricity detector 12 to achieve rotational connection.

The eccentricity detector 12 has a detection end 121 and an outer surface 122 . The outer surface 122 is affixed to the inner surface 114 of the connecting device 11 close to the first end 111, so that the detection end 121 faces the carrying device 13, and is used to eccentric the object to be detected (such as a lens) on the carrying device 13 detection. In this embodiment, the eccentricity detector 12 is a collimator, which may further include a display screen for displaying the lens eccentricity detection result. The eccentricity detector 12 can judge whether the eccentricity of the object to be detected is within the allowable range through the eccentricity detection result of the object to be detected displayed on the display screen.

The carrying device 13 includes a carrying portion 131 and a connecting portion 132 oppositely disposed, and has a through hole 135 passing through the carrying portion 131 and the connecting portion 132 . The carrying portion 131 is used to carry the object to be detected, and the connecting portion 132 is rotatably connected to the inner surface 114 of the connecting device 11 . The detection end 121 is directly opposite to the object to be detected fixed on the carrying part 131 , and the detection light from the detection end 121 can reach the object to be detected fixed on the carrying part 131 through the through hole 135 for detection. In this embodiment, the connecting portion 132 has an outer wall 133 opposite to the inner surface 114 for rotational connection with the inner surface 114 . The outer wall 133 defines an annular second rolling groove 134 perpendicular to the central axis of the receiving through hole 113 . The second rolling groove 134 is opposite to the first rolling groove 115 of the connecting device 11 , and cooperates with the first rolling groove 115 to form a receiving space for receiving the ball 116 . When the carrying device 13 and the connecting device 11 rotate relatively, the ball 116 rolls in the accommodation space formed by the second rolling groove 134 and the first rolling groove 115, so that the carrying device 13 circles around the opening of the receiving through hole 113 in the receiving through hole 113. The central axis rotates. Therefore, the relative rotation between the eccentricity detector 12 and the carrying device 13 always takes the central axis of the receiving through hole 113 as the rotation axis, so as to avoid the deviation caused by the deviation of the rotation axis during the rotation process.

In this embodiment, the eccentricity detection device 10 further includes a rotating table 14 . The end of the eccentricity detector 12 facing away from the detection end 121 is fixed on the rotating platform 14 for rotation driven by the rotating platform 14 .

Please refer to Fig. 4, the structure of the eccentricity detection device 20 provided for the second embodiment of the technical solution is roughly the same as that of the eccentricity detection device 10 provided by the first embodiment, the difference is that the carrying device 23 and the eccentricity detector 22 and the connecting device 21 connections. In this embodiment, the outer wall 233 of the connecting portion 232 of the carrying device 23 is provided with an annular first boss 234 . The first boss 234 is perpendicular to the central axis of the connecting device 21 and is used to cooperate with the connecting device 21 to achieve rotational connection. Certainly, the outer wall 233 may be provided with one or more first bosses 234 of other shapes. Preferably, the plurality of first bosses 234 are equally spaced around the central axis of the connecting device 21 . Correspondingly, the inner surface 214 of the second end portion 212 of the connecting device 21 defines a first sliding groove 216 matched with the first boss 234, so that the first boss 234 surrounds the center of the connecting device 21 in the first sliding groove 216. The axis rotates to drive the carrying device 23 to rotate around the central axis of the connecting device 21 .

In this embodiment, the eccentricity detector 22 is also rotatably connected to the connecting device 21 . Specifically, the outer surface 222 is provided with an annular second boss 223 . The second boss 223 is perpendicular to the central axis of the connecting device 21 . Correspondingly, the inner surface 214 of the first end portion 211 of the connecting device 21 defines a second sliding groove 217 matched with the second boss 223, so that the second boss 223 surrounds the center of the connecting device 21 in the second sliding groove 217. The axis rotates to drive the eccentricity detector 22 to rotate around the central axis of the connecting device 21 . Of course, one second boss 223 or a plurality of second bosses 223 may be arranged at intervals around the central axis of the connecting device 21 on the outer surface 222 . In addition, the eccentricity detector 22 can also adopt the rotational connection method of the carrying device 13 and the connecting device 11 in the first embodiment to realize the rotational connection.

It can be understood that the carrying device 23 or the eccentricity detector 22 can also be rotationally connected with the connecting device 11 in other ways, as long as the carrying device 23 and the eccentricity detector 22 can rotate relative to the central axis of the connecting device 21 .

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (9)

1. A kind of eccentricity detection device, it comprises eccentricity detector and carrying device, and described carrying device comprises the carrying portion and connecting portion that are arranged oppositely, and this carrying portion is used for carrying object to be detected, it is characterized in that, described eccentricity detecting device Also includes a connection device, the connection device has a first end and a second end opposite, the first end is connected to the eccentricity detector, the second end is connected to the carrying device The connection part is connected by rotation, so that the eccentricity detector and the carrying device can rotate relative to each other around the central axis of the connecting device, so that the eccentricity detector can detect the object to be detected carried on the carrying device. 2. The eccentricity detection device according to claim 1, wherein the connecting device is provided with a receiving through hole passing through the first end portion and the second end portion, and the eccentricity detector and the carrying device are respectively accommodated in the accommodating through hole. 3. The eccentricity detection device according to claim 1, wherein the first end is fixedly connected to the eccentricity detector, and the second end is rotatably connected to the carrying device. 4. The eccentric detection device as claimed in claim 3, wherein the connecting device has an inner surface, the inner surface of the second end portion is provided with a first rolling groove, and the carrying device has an inner surface opposite to the inner surface. The outer wall of the outer wall is provided with a second rolling groove, the first rolling groove and the second rolling groove are annular grooves perpendicular to the central axis of the connecting device, and are arranged oppositely, the first rolling groove and the second rolling groove Balls are accommodated in the accommodation space, so that the carrying device and the connecting device are rotatably connected. 5 . The eccentricity detection device according to claim 2 , wherein the receiving through hole is a stepped through hole, and the diameter of the hole near the first end is smaller than the diameter of the second end. 6 . 6 . The eccentricity detection device according to claim 1 , further comprising a rotary table, the eccentricity detector is arranged on the rotary table. 7 . 7. The eccentricity detection device according to claim 1, characterized in that, the first end is rotatably connected with the eccentricity detector. 8. The eccentric detection device according to claim 7, wherein the connecting device has an inner surface, and the carrying device has an outer wall opposite to the inner surface, and the outer wall is provided with a first boss, and the second The inner surface of the two ends is provided with a first sliding groove that cooperates with the first boss, so that the first boss can rotate around the central axis of the connecting device in the first sliding groove, and the eccentricity detector has a The outer surface of the first end portion is provided with a second boss, and the inner surface of the first end is provided with a second sliding groove that cooperates with the second boss, so that the second boss is in the second sliding groove Rotate around the central axis of the connecting device. 9. The eccentricity detection device according to claim 8, wherein the first boss and the second boss are annular bosses perpendicular to the central axis of the connecting device.

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