JP2005192169A - Imaging part, lens unit, and imaging system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging system capable of confirming image data with correction data, corresponding to a newly purchased interchangeable lens, reflected thereon immediately after performing photographing on an image monitor which is arranged in a camera. <P>SOLUTION: A portable terminal 1 with the camera includes: an interchangeable imaging part 3; and a body part 2 with an attachment part 2a for mounting the imaging part 3. The imaging part 3 includes an image forming optical system 10; an imaging element 21; a recording part 22; an image output part 42; a data output part 43; and an imaging part side engagement part 31. The body part 2 includes: an image input part 47; a data input part 48; a radio communications means 80; a sequence control circuit 27; an image correction circuit 101; and a body side engagement part 32. The sequence control circuit 27 transmits identification data of the imaging part 3 mounted on the body part 2 to a base station 200 and receives correction data corresponding to the identification data. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an exchangeable image pickup unit or lens unit that is provided in a digital camera, a camera-equipped mobile phone, and the like, and uses a free-form surface prism in an imaging optical system, and an image pickup system including the image pickup unit or the lens unit. .

  Digital cameras and camera-equipped mobile phones are required to be smaller and thinner. In these devices, in order to reduce the size of the imaging device, it is necessary to reduce the size of the lens or the number of lenses. However, when the size of the lens is reduced or the number of the lenses is reduced, the depictability of the object image formed by this optical system is lowered. For example, the effects of distortion (distortion aberration) and shading (peripheral dimming) increase.

  Distortion is a phenomenon in which when a lattice-like object image is photographed, the image is not correctly photographed in a lattice shape and is distorted into a barrel shape, a pincushion shape, or a Jinkasa shape. In the case of a lens in which distortion is conspicuous, a person or a building around the image does not stand upright, and the image is distorted in an arc shape. Shading is a phenomenon in which the amount of light in the peripheral part is insufficient and darker than in the central part of the screen. The deterioration of the image quality of the object image due to these optical causes tends to become more prominent as the size of the imaging device is reduced. These problems have become apparent in recent thin digital cameras and camera-equipped mobile phones.

  In addition, there is an interchangeable lens type camera in which interchangeable lenses having different shooting angles of view (focal lengths) are detachable in order to cope with various subject conditions. These interchangeable lens type cameras are common in a relatively large camera system such as a single-lens reflex camera system. Also, as small digital cameras and camera-equipped mobile phones have become widespread, there has been a demand for small digital cameras and camera-equipped mobile phones to be able to handle a wide variety of subject conditions with interchangeable lenses. .

  However, when the lenses are exchangeable, the degree of distortion and shading differs depending on the respective lenses. Therefore, it is desirable to change the correction value each time the lenses are exchanged. As one method for solving this problem, there is a method disclosed in Patent Document 1. In this method, ID data of the interchangeable lens is stored in advance in a memory built in the interchangeable lens. The camera body records the ID data of the interchangeable lens together with the captured image data on a recording medium connected to the camera body. Then, the image is corrected by applying the recording medium to the image processing apparatus after shooting and referring to the optical correction data specific to the lens from the ID number of the lens used for shooting.

In addition, when a so-called pirated lens that is not a genuine image pickup unit or lens unit is used, the desired performance cannot be obtained and the function on the main body side may be damaged. As a method for solving this problem, there are methods described in Patent Documents 2 to 4. In these technologies, identification data stored in an accessory such as an interchangeable lens is read out by the camera body, and it is determined whether the attached accessory is a genuine product or a pirated version.
JP 2000-184247 A JP 2003-228113 A JP 2003-228114 A JP 2003-228115 A

  However, the method described in Patent Document 1 has a problem that the corrected image data cannot be confirmed on an image monitor provided in the camera after shooting. A method of storing all the optical correction data corresponding to each lens inside the camera is also conceivable, but it occupies a memory area and it is difficult to cope with a newly released interchangeable lens. The problem arises.

  Also, when determining whether the product is genuine or pirated by the methods of Patent Documents 2 to 4, there is a possibility that ID data is analyzed and a pirated copy including this ID data is available. Therefore, it is necessary to set more advanced ID data for a new product or a newly sold genuine product. However, if new ID data is set, it cannot be recognized by camera bodies already on the market. In order to use a new lens, it is only necessary to reset the camera body so that the new ID can be recognized, but this is not easy for all users. Further, a function for setting a new ID and a memory for storing them are required.

  Therefore, the present invention can check the image data reflecting the correction data corresponding to the newly purchased interchangeable lens immediately after shooting on the image monitor provided in the camera, and easily confirm the authenticity of the newly purchased interchangeable lens. It is an object of the present invention to provide an imaging system that can be determined in a simple manner and an optical unit applied to the imaging system.

  An imaging system according to the present invention includes a replaceable imaging unit and a main body provided with a mounting unit for mounting the imaging unit. The imaging unit includes an imaging optical system, an imaging element, a recording unit, an image output unit, a data output unit, and an imaging unit side engagement unit. In the imaging optical system, a light beam from an object is incident to form an object image on the imaging surface. The imaging element is disposed on the imaging plane and converts the object image into image data. The recording unit records the identification data set in the imaging unit. The image output unit outputs image data output from the image sensor to the main body unit. The data output unit outputs the identification data recorded in the recording unit to the main body unit. The imaging unit engaging unit attaches the imaging unit to the attachment unit. The main body unit includes an image input unit, a data input unit, a wireless communication unit, a wireless communication control unit, a correction calculation unit, and a main body side engagement unit. The image input unit receives image data output from the image output unit. Identification data output from the data output unit is input to the data input unit. The wireless communication means wirelessly communicates with the base station. The wireless communication control unit transmits the identification data input from the imaging unit to the base station via the wireless communication unit, and receives optical correction data corresponding to the identification data from the base station. The correction calculation unit corrects the image data input from the imaging unit with the optical correction data received from the wireless communication unit. The main body side engaging portion is fitted to the imaging portion side engaging portion to fix the imaging portion to the attachment portion of the main body portion.

  An imaging system according to another aspect of the present invention includes an interchangeable lens unit and a main body provided with a mounting portion for mounting the lens unit. The lens unit includes an imaging optical system, a light output unit, a recording unit, a data output unit, and a lens unit side engagement unit. In the imaging optical system, a light beam from an object is incident to form an object image on the imaging surface. The light output unit outputs a light beam from the imaging optical system. The recording unit records the identification data set in the lens unit. The data output unit outputs the identification data recorded in the recording unit to the main body unit. The lens unit side engaging portion attaches the lens unit to the mounting portion. The main body includes an optical input unit, an image sensor, a data input unit, wireless communication means, wireless communication control means, correction calculation means, and a main body side engaging part. The light input unit receives the light beam output from the light output unit. The image sensor receives a light beam input to the light input unit and converts an object image formed by the imaging optical system into image data. The data input unit receives identification data output from the data output unit. The The wireless communication means wirelessly communicates with the base station. The wireless communication control means transmits the identification data input from the lens unit to the base station via the wireless communication means, and receives optical correction data corresponding to the identification data from the base station. The correction calculation means corrects the image data input from the image sensor with the optical correction data received from the wireless communication means. The main body side engaging portion is fitted to the lens unit side engaging portion to fix the lens unit to the mounting portion of the main body portion.

  An imaging system according to another aspect of the present invention includes a replaceable imaging unit and a main body provided with a mounting unit for mounting the imaging unit. The imaging unit includes an imaging optical system, an imaging element, a recording unit, an image output unit, a data output unit, and an imaging unit side engagement unit. In the imaging optical system, a light beam from an object is incident to form an object image on the imaging surface. The imaging element is disposed on the imaging plane and converts the object image into image data. The recording unit records the identification data set in the imaging unit, and the image output unit outputs the image data output from the imaging element to the main body unit. The data output unit outputs the identification data recorded on the recording medium to the main body unit. The imaging unit side engaging unit attaches the imaging unit to the mounting unit. The main body unit includes an image input unit, a data input unit, a wireless communication unit, a wireless communication control unit, an operation control unit, and a main body side engagement unit. The image input unit receives image data output from the image output unit. Identification data output from the data output unit is input to the data input unit. The wireless communication means wirelessly communicates with the base station. The wireless communication control unit transmits the identification data input from the imaging unit to the base station via the wireless communication unit, and receives data related to operation permission corresponding to the identification data from the base station. The operation control means controls the operation of the imaging unit based on data relating to operation permission from the wireless communication means. The main body side engaging portion is fitted with the imaging portion side engaging portion to fix the imaging portion to the attachment portion.

  An imaging system according to another aspect of the present invention includes an interchangeable lens unit and a main body provided with a mounting portion for mounting the lens unit. The lens unit includes a coupling optical system, a light output unit, a recording unit, a data output unit, and a lens unit side engagement unit. In the imaging optical system, a light beam from an object is incident to form an object image on the imaging surface. The light output unit outputs a light beam from the imaging optical system. The recording unit records the identification data set in the lens unit. The data output unit outputs the identification data recorded in the recording unit to the main body unit. The lens unit side engaging portion attaches the lens unit to the mounting portion. The main body includes an optical input unit, an image sensor, a data input unit, a wireless communication unit, a wireless communication control unit, an operation control unit, and a main body side engagement unit. The light input unit receives the light beam output from the light output unit. The image sensor receives the light beam input to the light input unit and converts the object image formed by the imaging optical system into image data. Identification data output from the data output unit is input to the data input unit. The wireless communication means wirelessly communicates with the base station. The wireless communication control means transmits the identification data input from the lens unit to the base station via the wireless communication means, and receives data relating to operation permission corresponding to the identification data from the base station. The operation control means controls the operation of the lens unit based on data relating to operation permission from the wireless communication means. The main body side engaging portion is fitted to the lens unit side engaging portion to fix the lens unit to the mounting portion of the main body portion.

  An imaging system according to another aspect of the present invention includes a main body unit, an optical unit, an imaging optical system, an image sensor, a recording unit, a data output unit, a data input unit, a wireless communication unit, a wireless communication control unit, and a main body side control unit. With. The main body portion exposes an operation member group including a plurality of operation members. The optical unit is selected from a plurality of different specifications according to imaging conditions and used in a state of being mounted on an attachment portion provided in the main body. The imaging optical system is built in the optical unit and forms an object image on the imaging surface with a light beam incident from the object. The image sensor is disposed on the image plane and converts the object image into image data. The recording unit records identification data that is mounted on the optical unit and set in the optical unit. The data output unit is provided in the optical unit and outputs identification data to the main body unit. The data input unit is provided in the main body unit and receives identification data. The wireless communication means is provided in the main body and performs wireless communication with the base station. Wireless communication control means, transmitting identification data input from the data input section to the main body section to the base station, and receiving a control signal returned from the base station corresponding to the transmitted identification data via the wireless communication means . The main body side control unit controls the imaging operation based on the control signal. In this case, the main body side control unit receives the optical correction data of the imaging optical system as a control signal returned in response to the identification data of the optical unit, or corresponds to the identification data of the optical unit. As a control signal to be returned, data related to operation permission for imaging by the optical unit is received.

  The imaging unit according to the present invention has a wireless communication unit and is an exchangeable type that is used in a state of being mounted on a mounting unit provided in a main body of an imaging system that acquires a control signal related to imaging from a base station by the wireless communication unit. The imaging optical system, the imaging device, and the recording unit each include an image output unit, a data output unit, and an imaging unit side engagement unit. In the imaging optical system, a light beam from an object is incident to form an object image on the imaging surface. The imaging element is disposed on the imaging plane and converts the object image into image data. The recording unit records identification data set in the imaging unit to be transmitted to the base station by wireless communication means. The image output unit outputs image data output from the image sensor to the main body unit. The data output unit outputs the identification data recorded in the recording unit to the main body unit. The imaging unit side engaging unit attaches the imaging unit to the mounting unit.

  The lens unit according to the present invention is an interchangeable type used in a state where the lens unit has a wireless communication unit and is attached to a mounting portion provided in a main body of an imaging system that acquires a control signal related to imaging from a base station by the wireless communication unit. The lens unit includes an imaging optical system, a light output unit, a recording unit, a data output unit, and a lens unit side engagement unit. In the imaging optical system, a light beam from an object is incident to form an object image on the imaging surface. The light output unit outputs a light beam from the imaging optical system. The recording unit records the identification data set in the lens unit to be transmitted to the base station by wireless communication means, and outputs the identification data recorded in the recording unit to the main unit. The lens unit side engaging portion attaches the lens unit to the mounting portion.

  According to the imaging system of the present invention, the main unit reads identification data from the mounted imaging unit or lens unit, and transmits the identification data to the base station using wireless communication means. The main body unit receives optical correction data corresponding to the identification data from the base station, and corrects the image data using the received optical correction data. That is, this imaging system obtains the individual optical correction data of the imaging optical system of the mounted imaging unit from the outside every time the imaging unit or the lens unit is replaced by the wireless communication means. Therefore, it is not necessary to previously store optical correction data corresponding to each imaging unit or lens unit in the main body unit. Therefore, the memory built in the main body can be effectively used. In addition, when a new imaging unit or lens unit is released, optical correction data is simply added to the server connected to the base station without requiring any special operation on the main unit. The optical correction of the newly purchased imaging unit or lens unit can be reflected.

  According to another aspect of the imaging system of the present invention, the main unit reads identification data from the mounted imaging unit or lens unit, and transmits the identification data to the base station using wireless communication means. . Then, whether or not the identification data is genuine is determined by a device connected to the base station. When it is determined that the mounted imaging unit or lens unit is a genuine product, the main unit receives an operable signal transmitted from the base station to enable the imaging function and is not a genuine product. That is, when it is determined that the image is a pirated version, an inoperable signal transmitted from the base station is received to the effect that the imaging function is disabled. That is, this imaging system obtains data regarding the operation permission of the mounted imaging unit or lens unit from the outside every time the imaging unit or lens unit is replaced by the wireless communication means. Therefore, even if an image pickup unit or lens unit supplied to the market after the main unit or a new image pickup unit or lens unit having new format identification data is purchased, the authenticity of the image pickup unit or lens unit can be easily determined. can do. In addition, it is possible to monitor the state in which the imaging system is utilized in the market. For example, it is possible to monitor the usage status such as whether pirated versions are available in the market or what kind of imaging unit or lens unit is used by a user in the market.

  An imaging system according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the camera-equipped mobile terminal 1 includes a main body 2 and an imaging unit 3. The main body 2 is formed with a mounting portion 2a to which the imaging unit 3 is attached. The attachment portion 2a is formed such that one of the corner portions of the main body portion 2 is cut out in a rectangular parallelepiped shape. The image pickup unit 3 is formed in a size that fits flush with the outer shape of the main body unit 2 when mounted on the attachment unit 2a. Further, as shown in FIG. 1, the imaging unit 3 is provided so as to be removable from the main body unit 2. In addition, when the imaging part 3 with different specifications is attached to the attachment part 2a, it may protrude from the outer shape of the main body part 2 or may be recessed.

  The imaging unit 3 includes the first prism 11, the second prism 12, the imaging device 21, the recording unit 22, the imaging unit housing 30, the imaging unit side terminal unit 40, and the imaging unit illustrated in FIGS. A side engagement portion 31 and a lock pin 51 are provided. In this case, the imaging unit 3 is an optical unit that incorporates the imaging element 21. The first prism 11 includes a first incident surface 11a, a first reflecting surface 11b, and a first exit surface 11c. The second prism 12 includes a second incident surface 12a, two second reflecting surfaces 12b and 12c, and a second exit surface 12d. The first reflecting surface 11b and the second reflecting surfaces 12b and 12c are each formed in a free-form surface shape.

  The light beam incident from the first incident surface 11a of the first prism 11 is reflected by the first reflecting surface 11b and then exits from the first exit surface 11c. The light beam emitted from the first exit surface 11c enters the second incident surface 12a of the second prism 12, is reflected by the second reflecting surfaces 12b and 12c, and then passes from the second exit surface 12d to the imaging surface A. It is injected towards. In addition, the incident optical axis λi of the light beam incident on the first incident surface 11a from the object and the emission optical axis λo of the light beam emitted from the second exit surface 12d toward the imaging plane A are not arranged coaxially. .

  That is, the first prism 11 and the second prism 12 constitute a prism optical system having at least one reflecting surface formed in a free-form surface, and a light beam from an object is incident as shown in FIG. 2 is an example of a prism optical system included in the imaging optical system 10 that forms an object image on an image plane A; Therefore, the prism optical system may include a third prism or a lens in addition to the two prisms, or may be configured by one prism. The imaging optical system 10 may further include a filter, a diaphragm, and the like.

As a feature of the prism optical system constituted by such prisms, there are the following advantages.
(1) The three reflecting surfaces 11b, 12b, and 12c use free-form curved surfaces having power, but these reflecting surfaces 11b, 12b, and 12c have a large power compared to a refractive optical system such as a lens. Can be obtained at the same time without being affected by chromatic aberration.
(2) Seven optical surfaces (first incident surface 11a, first reflecting surface 11b, first exit surface 11c, second entrance surfaces 12b and 12c, and second exit surface 12d) can be provided in a compact space. . Therefore, the optical elements can be condensed and set in a limited space.
(3) In order to improve optical performance, it is preferable to lengthen the optical path length of the entire optical system to some extent. By using such a prism optical system and bending the optical path, the imaging optical system 10 having a long optical path length and a compact overall size can be realized.
That is, it is possible to obtain an object image with good image quality while the occupied volume that the optical system tightens is compact.

  The imaging element 21 is a CCD (Charge-coupled device) in which a large number of semiconductor elements such as phototransistors that convert light into an electrical signal are arranged on the light receiving surface 21a. The image sensor 21 has a light receiving surface 21a disposed on the image plane A, converts an object image formed on the image plane A into image data of an electrical signal, and outputs the image data. The image sensor 21 is mounted on the substrate 23. A recording unit 22 is mounted on the first prism 11 side end portion of the substrate 23 which is the other side when the side on which the imaging element 21 is disposed is the one side. The recording unit 22 records identification data (for example, data representing the serial number and the type of the imaging unit) that uniquely identifies the imaging unit 3 as unique data of the imaging unit 3.

  The imaging unit housing 30 houses the imaging optical system 10, the imaging device 21, and the recording unit 22. The imaging unit housing 30 is formed in a rectangular parallelepiped shape along the outer shape of the imaging optical system 10. The outer surface of the imaging unit housing 30 on the side on which the substrate is attached is the mounting surface 3a of the imaging unit 3, and an imaging unit side engaging unit 31 is provided as shown in FIG. As shown in FIG. 3, the imaging unit side engaging unit 31 protrudes from the mounting surface 3a, and the tip is bent in a bowl shape. In addition, the substrate 23 on which the imaging element 21 is mounted is connected to the imaging unit side terminal unit 40. The imaging unit side terminal unit 40 penetrates through the imaging unit casing 30 and is exposed to the outside of the imaging unit casing 30, and has a shape provided on the outer periphery of the imaging unit casing 30.

  The imaging unit side terminal unit 40 outputs a signal input unit 41 to which a control signal for controlling the operation of the imaging unit 3 is input from the main body unit 2, an image output unit 42 that outputs image data, and identification data of the recording unit 22. In addition to the data output unit 43, a power input unit 44 is provided, each of which is formed by a cantilever spring contact. In addition, the shape of the contact point is an example, and other shapes may be used as long as the connection terminal is conductive.

  The imaging unit housing 30 includes an incident window 30 w that allows a light beam from an object to pass through the first incident surface 11 a of the first prism 11. The entrance window 30w is fitted with a cover glass for dust prevention or the like and a filter for cutting infrared rays.

  Further, as shown in FIG. 3, a lock pin 51 and a spring 52 are provided in the plate thickness of the imaging unit housing 30. An operation knob 51 a that is exposed to the outside of the imaging unit housing 30 is formed on the lock pin 51. The spring 52 biases the lock pin 51 in a direction protruding from the mounting surface 3a.

  As shown in FIGS. 1 to 3, a mounting surface 2 b facing the mounting surface 3 a of the imaging unit 3 is provided on the mounting portion 2 a provided on the main body 2. A body-side engagement portion 32, a body-side terminal portion 45, and a lock hole 53 are provided on the mounted surface 2b. The main body side engaging portion 32 is a key slot that is recessed from the mounted surface 2b, and is disposed at a position corresponding to the imaging portion side engaging portion 31 that is a key provided on the mounting surface 3a of the imaging portion 3. ing.

  The imaging unit side engaging unit 31 is inserted into the main body side engaging unit 32 in a state where the mounting surface 3a of the imaging unit 3 and the mounted surface 2b of the mounting unit 2a are aligned, and performs imaging along the direction in which the key slot extends. By sliding the part 3, the main body side engaging part 32 is engaged. The lock pin 51 and the lock hole 53 are a lock mechanism 50 provided between the main body 2 and the imaging unit 3. Since the lock pin 51 is fitted into the lock hole 53, the imaging unit 3 is prevented from falling off the main body 2. When removing the imaging unit 3, the operation knob 51 a of the lock pin 51 is operated against the spring 52 to release the lock mechanism 50. The form of the lock mechanism 50 is not limited as long as it restricts the sliding operation between the imaging unit side engaging unit 31 and the main body side engaging unit 32 in a state where the imaging unit 3 is mounted on the mounting unit 2a. Shapes and arrangements other than those shown in FIG. 1 and FIG.

  The relationship between the imaging unit side engaging unit 31 and the main body side engaging unit 32 may be provided in reverse. That is, the imaging unit side engaging portion 31 may be formed as a key slot and the main body side engaging portion 32 may be formed as a key. Further, the shapes of the imaging unit side engaging unit 31 and the main body side engaging unit 32 are not limited to those having an L-shaped cross section across the sliding direction T, as shown in FIG. That is, it is only necessary that the imaging unit 3 is firmly held without rattling with respect to the mounting portion 2a of the main body unit 2 as a result of the slide mounting of the imaging unit 3.

  The main body side terminal unit 45 is provided to face the imaging unit side terminal unit 40, and outputs a control signal for controlling the operation of the imaging unit 3, an image input unit 47 to which image data is input, and In addition to a data input unit 48 to which identification data of the imaging unit 3 is input, a power output unit 49 that supplies power to the imaging unit 3 is provided.

  FIG. 4 is a block diagram showing the overall configuration of the camera-equipped mobile terminal 1. Further, with respect to the standard imaging unit 3 mounted on the main body unit 2, an imaging unit with zoom 3z having a zoom function is shown as another imaging unit prepared for replacement. The imaging unit 3 includes an imaging element interface circuit 24 and an imaging unit side communication control circuit 25 in addition to the imaging optical system 10, the imaging element 21, and the recording unit 22 described above. The imaging unit with zoom 3z further includes a zoom mechanism 10z. The zoom mechanism 10z is driven by a control signal input from the signal input unit 41.

  The main body 2 includes a main body side communication control circuit 26, a sequence control circuit 27, a compression / decompression circuit 28, a recording means 29, an applied recording medium 29a, an operation member group 60, a display means 70, a wireless communication means 80, an image A correction circuit 101 and a frame memory 102 are provided. In this case, the applied recording medium 29 a means a memory built in the main body 2 or a memory card or a magnetic recording device that is detachably provided in the main body 2.

  The imaging element interface circuit 24 is provided between the imaging element 21 and the imaging unit side communication control circuit 25. The recording unit 22 and the imaging unit side terminal unit 40 are connected to the imaging unit side communication control circuit 25. The main body side communication control circuit 26 is provided between the main body side terminal portion 45 and the sequence control circuit 27.

  The sequence control circuit 27 is an example of the main body side control means, and is connected to the compression / expansion circuit 28, the recording means 29, the operation member group 60, the monitor interface 71 of the display means 70, and the wireless communication circuit 81 of the wireless communication means 80. Has been. The sequence control circuit 27 includes a main body control unit and wireless communication control means which are operation control means. The operation control unit controls the operation of the imaging unit 3 based on the data regarding the operation permission received by the wireless communication unit 80 and the control signal. The wireless communication control unit transmits the identification data input from the imaging unit 3 to the base station 200 via the wireless communication unit 80, and receives the optical correction data transmitted from the base station 200 corresponding to the identification data. To do. An example of specific operations of the operation control unit and the wireless communication control unit is shown in an imaging sequence described later.

  The compression / decompression circuit 28 is data compression / expansion means for compressing image data and decompressing the compressed image data. The recording unit 29 records the compressed image data and data related to the image data on the recording medium 29a to be applied.

  The operation member group 60 includes a release button and an operation button as an example of the operation member, and each is exposed to the outer surface of the main body 2. The operation member group 60 outputs an operation signal for controlling the imaging operation of the imaging unit 3 when manually operated. The display unit 70 includes a monitor 72 connected to the monitor interface 71 and having an image display surface exposed on the outer surface of the main body 2.

  The wireless communication means 80 includes an antenna 82 connected to the wireless communication circuit 81 and provided facing the outer surface of the main body 2. The wireless communication means 80 is wirelessly connected to a nearby base station 200 and transmits and receives information.

  The image correction circuit 101 is an example of a correction calculation unit, and corrects distortion, shading, and the like of image data based on correction data received by the wireless communication unit. The correction data is different between the imaging unit 3 and the imaging unit with zoom 3z. The frame memory 102 temporarily stores image data in the middle of image processing when various image processing is performed on the image data obtained by the imaging unit 3 or the imaging unit with zoom 3z by the sequence control circuit.

  Here, with reference to FIG. 5 to FIG. 8, distortion, shading generation principles, and the form of correction data will be briefly described. First, distortion correction data will be described. FIG. 5 shows distortion of light incident on the optical system Os at an angle θ. On the optical axis that is separated from the optical system Os by the focal length f, an image having a real image height z affected by the distortion with respect to the ideal image height z ′ is formed.

In this case, the magnitude a of the distortion is expressed by the following equation (1).
a = (z−z ′) / z ′ × 100 (%) (1)
However, z ′ = f × tan (θ) (2)
The aberration of the optical system is generally a function of the image height.

  FIG. 6 shows a distortion aberration curve in the case where the vertical axis is the real image height z and the horizontal axis is distortion a. FIG. 7 shows an image when the square lattice is distorted. FIG. 7 (a) is called a barrel type, FIG. 7 (b) is a pincushion type, FIG. 7 (c) is a Jinkasa type, FIG. 6 (a) is shown in FIG. 6 (b) corresponds to FIG. 7 (b), and FIG. 6 (c) corresponds to FIG. 7 (c).

Here, these aberration curves are developed as follows.
a (z) = A ₁ · z + A ₂ · z ² + A ₃ · z ³ + A ₄ · z ⁴ + A ₅ · z ⁵ + A ₆ · z ⁶ + (3)
If the expansion coefficients A ₁ , A ₂ , A ₃ ... Of the expression (3) are included as distortion correction data, the aberration characteristics shown in FIG. 6 can be corrected by performing a correction operation. These expansion coefficients have higher correction accuracy as the order is larger. However, in this embodiment, the expansion coefficients A ₁ , A ₂ , A ₃ , A ₄ , having up to a ₅ as the distortion correction data.

Next, shading correction data will be described. When the effective luminance on the film surface is b and the ideal image luminance is b ′, the shading magnitude D is expressed by the following equation (4).
D = (b−b ′) / b ′ × 100 (%) (4)
Assuming that shading is a function of image height, when the real image height z is taken on the vertical axis and the shading D is taken on the horizontal axis, the shading curve shown in FIG.

  In the present embodiment, due to the amount of correction data and the calculation time, the number of points is limited to five as shown in FIG. 8A, and five points of shading data are connected as shown in FIG. 8B. It is approximated by a shading line consisting of a broken line.

  Next, an imaging sequence of the camera-equipped mobile terminal 1 configured as described above will be described with reference to FIGS. 4 and 9. In this camera-equipped mobile terminal 1, the sequence control circuit 27 determines whether or not the imaging unit 3 has been removed (S1). If the imaging unit 3 has been removed, the imaging unit 3 is newly attached. It is determined whether it has been received (S2). When the imaging unit is not removed, the process shifts to an imaging standby state. In addition, after the image pickup unit 3 is removed, when the image pickup unit 3 is not newly attached, the apparatus waits in that state until the image pickup unit 3 is newly attached.

  When the imaging unit 3 is newly attached, the sequence control circuit 27 of the main body unit 2 reads identification data of the imaging unit 3 (S3). The read identification data is compared with the identification data recognized by the sequence control circuit 27 until then (S4). If the read identification data matches the identification data that has been recognized by the sequence control circuit 27 until then, it is determined that the same imaging unit 3 has been reattached, that is, the imaging unit 3 has not been replaced. Thus, the state shifts to the image pickup possible state. When the read identification data is different from the identification data recognized by the sequence control circuit 27 until then, it is determined that a different image pickup unit 3 is attached, that is, the image pickup unit 3 is replaced, and the wireless communication circuit 81 is set. The identification data is transmitted from the antenna 82 to the base station 200 (S5).

  For example, a server 400 and a data bank 401 of a manufacturer that manufactures and sells the imaging unit 3 are connected to the base station 200 via the information communication network 300. The data bank 401 stores correction data of the imaging optical system 10 associated with identification data of the imaging unit 3 that has already been manufactured and sold. Then, correction data associated with identification data that matches the transmitted identification data is sent back from the base station 200.

  Therefore, the camera-equipped mobile terminal 1 receives the correction data transmitted from the base station 200 via the wireless communication circuit 81 (S6), so that the imaging optical system of the imaging unit 3 attached to the main body unit 2 is received. 10 can be obtained. The camera-equipped mobile terminal 1 becomes ready for imaging by obtaining correction data of the imaging unit. Then, the sequence control circuit 27 determines whether or not the release button of the operation member group 60 has been pressed (S7).

  When the release button is pressed, an operation signal is output to the sequence control circuit 27. The sequence control circuit 27 has operation control signal generation means, and outputs an operation control signal for controlling the imaging operation of the imaging unit 3 when an operation signal is input. The operation control signal is output from the main body side terminal unit 45 to the imaging unit 3 via the main body side communication control circuit 26. The imaging unit 3 captures an image based on the operation control signal (S8), and outputs the image data from the imaging unit side terminal unit 40 to the main body unit 2 via the imaging unit side communication control circuit 25.

  The sequence control circuit 27 applies the optical correction data of the imaging optical system 10 of the imaging unit 3 acquired from the base station 200 by the wireless communication unit 80, and controls the body side communication control from the image input unit 47 of the body side terminal unit 45. The image data input through the circuit 26 is subjected to shading correction (S9) and distortion correction (S10) using the image correction circuit 101 and the frame memory 102. When the correction of the image data is completed, the sequence control circuit 27 compresses the image data using the compression / decompression circuit 28 (S11), and records the compressed image data on the recording medium 29a by the recording means 29 (S12). .

  An imaging system according to a second embodiment of the present invention will be described with reference to FIG. 1 to FIG. 8 and FIG. Note that the imaging sequence is different from the camera-equipped mobile terminal 1 of the first embodiment. Therefore, the description relating to the configuration of the camera-equipped mobile terminal 1 in the present embodiment shall refer to the description of the camera-equipped mobile terminal 1 in the first embodiment and FIGS. 1 to 8. Description is omitted. Moreover, since the configuration of the entire imaging system is the same as the block diagram shown in FIG. 4 of the camera-equipped mobile terminal 1 of the first embodiment, the description in this embodiment is omitted. Furthermore, in the imaging sequence, the same symbols are attached to those performing the same operation.

  An imaging sequence of the camera-equipped mobile terminal 1 according to the present embodiment will be described with reference to FIGS. 4 and 10. In this camera-equipped mobile terminal 1, the sequence control circuit 27 built in the main body 2 is connected to the base station 200 using the wireless communication means 80, and based on the identification data stored in the recording unit 22 of the imaging unit 3. The authenticity of the image pickup unit 3 attached to the attachment portion 2a of the main body 2 is confirmed. That is, it is determined whether the mounted imaging unit 3 is a genuine product that conforms to the main body unit 2 or a pirated version that is made to resemble a genuine product.

  Therefore, first, when the camera-equipped mobile terminal 1 enters the imaging sequence, it determines whether or not the imaging unit 3 has been removed (S1). When the imaging unit 3 is not removed, the state up to that point is maintained. When the imaging unit 3 is removed, it is further determined whether the imaging unit 3 is newly attached (S2). And it waits in the state until the imaging part 3 is newly attached.

  When the imaging unit 3 is newly attached to the main body unit 2, the sequence control circuit 27 of the main body unit 2 reads the identification data of the imaging unit 3 (S3). However, some pirated imaging units may not have identification data. Therefore, the sequence control circuit 27 determines whether or not there is identification data (S21). Those having no identification data are judged to be pirated, and a warning is immediately displayed on the monitor 72 provided in the main unit 2 (S22). In this case, before the warning is displayed after it is found that there is no identification data (S22a) or after the warning is displayed (S22b), the fact that the pirated version has been installed is transmitted by the wireless communication means 80. May be.

  If the imaging unit 3 has identification data, the identification data is compared with the identification data that has been recognized by the sequence control circuit 27 (S4). If the read identification data matches the identification data recognized by the sequence control circuit until then, it is determined that the same imaging unit 3 has been reattached, and the imaging unit 3 has not been replaced, and the imaging state Migrate to If the identification data does not match the identification data recognized by the sequence control circuit 27 until then, it is determined that a different imaging unit 3 is attached, that is, the imaging unit 3 has been replaced, and the wireless communication circuit 81 is The identification data is transmitted from the antenna 82 to the base station 200 (S5).

  The transmitted identification data is compared with genuine product identification data stored in the data bank 401 by the server 400 connected to the base station 200. If the identification data transmitted from the camera-equipped mobile terminal 1 matches the identification data stored in the data bank 401 as a genuine product, the optical correction data of the imaging optical system corresponding to the identification data from the server 400 is received as the imaging permission signal. Sent with. If the identification data transmitted from the camera-equipped mobile terminal 1 does not match any of the identification data in the data bank 401, a warning signal is transmitted as an imaging non-permission signal.

  The camera-equipped mobile terminal 1 that has transmitted the identification data to the base station 200 determines whether or not a warning signal has been received (S23). When the warning signal is received, the sequence control circuit 27 displays a warning on the monitor 72. (S22). If no warning signal is received, the sequence control circuit 27 determines whether an imaging permission signal is received (S24). If the imaging permission signal is not received, it is determined again whether a warning signal is received (S23). When the imaging permission signal and the optical correction data are received, the sequence control circuit 27 enters a standby state in which imaging can be performed. Before determining whether a warning signal has been received (S23), it may be determined whether an imaging permission signal and optical correction data have been received (S24).

  When the release button of the operation member group 60 is pressed (S7) in the camera-equipped mobile terminal 1 that is in a ready state for photographing (S7), it is confirmed again that the imaging permission signal has been received (S25). Is not received, a warning is displayed on the monitor 72 (S22). In addition, when the imaging permission signal is received, the operation signal is input to the sequence control circuit 27. When the operation signal is input, the sequence control circuit 27 outputs an operation control signal by the operation control signal generating means, and performs imaging (S8).

  When the captured image data is input from the imaging unit 3 to the main body unit 2, the sequence control circuit 27 uses the optical correction data received from the base station 200 together with the imaging permission signal by the wireless communication unit 80 to convert the image data. The image correction circuit 101 performs distortion correction and shading correction (S9, S10). When the correction is completed, the sequence control circuit 27 compresses the image data using the compression / decompression circuit 28 (S11), and records the compressed image data on the recording medium 29a by the recording means 29 (S12).

  When the image capturing unit 3 is replaced, the camera-equipped mobile terminal 1 transmits identification data to the base station 200 and verifies whether the mounted image capturing unit 3 is a genuine product compatible with the main body unit 2. Accordingly, the authenticity of the new imaging unit 3 sold after the main unit 2 can be easily determined. Further, a manufacturer that manufactures and sells the imaging unit 3 can check the usage status of the imaging unit sold from the transmitted identification data and the distribution status of pirated copies in the market. Further, when a pirated version having no identification data is installed, it is transmitted to the base station 200, so that it is possible to check the distribution status in the market.

  An imaging system according to a third embodiment of the present invention will be described with reference to FIGS. 11 to 14 by taking a camera-equipped mobile terminal 1a as an example. In addition, about the structure which has the same function as the portable terminal 1 with a camera in 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  This camera-equipped mobile terminal 1a differs from the camera-equipped mobile terminal 1 of the first embodiment in that an image sensor 21 is built in the main body 2 as shown in FIGS. Accordingly, the camera-equipped mobile terminal 1a is different in connection form between the main body 2 and the imaging unit 3 attached to the attachment 2a. In the present embodiment, the imaging unit 3 does not include the imaging element 21, and thus has a function as a lens unit. That is, the imaging unit 3 according to the first embodiment is an optical unit including the imaging element 21, whereas the imaging unit 3 according to the present embodiment is an optical unit that does not include the imaging element 21.

  First, as illustrated in FIG. 11, a light output unit 91 is provided on the second prism 12 side of the mounting surface 3 a of the imaging unit housing 30. The light output unit 91 is an exit window that allows a light beam emitted from the second exit surface 12d of the second prism 12 to pass along the exit optical axis λo. Further, a light input portion 92 is provided on the mounting surface 2 b of the main body portion 2 facing the light output portion 91. As shown in FIGS. 11, 13, and 14, the light output unit 91 and the light input unit 92 are fitted with a cover glass for dust prevention and a filter for cutting infrared rays.

  As shown in FIG. 13, the imaging element 21 is disposed in the main body 2 so that the light receiving surface 21 a is positioned at the position of the imaging plane A on the emission optical axis λo. As shown in FIG. 14, the image sensor interface circuit 24 is provided between the image sensor 21 and the sequence control circuit 27 in the main body 2. Therefore, the image output unit 42 is not required for the image pickup unit side terminal unit 40 provided in the image pickup unit 3.

  The main body side terminal unit 45 includes a signal output unit 46, a data input unit 48, and a power output unit 49. In addition, the main body side terminal unit 45 further includes an image input unit 47 similarly to the main body side terminal unit 45 of the first embodiment, so that the image pickup unit 3 incorporating the image pickup device 21 shown in the first embodiment. You will be able to deal with it. Further, since the light output unit 91 and the light input unit 92 are provided, the imaging unit side terminal unit 40 and the main body side terminal unit 45 are disposed on the first prism 11 side.

  Then, as shown in FIG. 12, the imaging unit 3 is slid along the direction T in a state where the mounting surface 3a is superimposed on the mounted surface 2b on the main body unit 2 side, and the imaging unit side engaging unit 31 is moved to the main body. By being fitted to the side engagement portion, it is fixed to the attachment portion 2a.

  In 3rd Embodiment, the imaging sequence demonstrated using FIG. 9 and FIG. 10 by the 1st and 2nd embodiment is applied to the portable terminal 1 with a camera. Since each imaging sequence has already been described in the description of the first and second embodiments, the description in this embodiment will be omitted.

  In each embodiment, the present invention has been described by applying a prism lens optical system as an imaging optical system built in the imaging unit 3, the imaging unit with zoom 3z, and the imaging unit 3 that is a lens unit. The present invention transmits the identification data of the optical system by wireless communication means, acquires the correction data, corrects the captured image data, or of the imaging unit mounted based on the transmitted identification data This is an imaging system that obtains the result of determination of authenticity and performs operation control. Therefore, even if the imaging optical system is an imaging unit configured only by a coaxial optical system, the same effect as that of the above-described embodiment can be obtained.

  Further, even if the lock mechanism 50 is provided with the lock pin 51 on the main body 2 side and the lock hole 53 is provided on the imaging unit 3 side, the function as the lock mechanism 50 is not changed. Since the lock pin 51 is provided on the main body side, the volume of the imaging unit 3 can be reduced.

  In each embodiment, a camera-equipped mobile terminal is described as an example of an apparatus to which the imaging system is applied. However, the imaging system of the present invention is applied to an electronic device having an imaging function, such as a digital camera or a portable electronic device. Is possible.

The disassembled perspective view which shows the portable terminal with a camera of 1st Embodiment which concerns on this invention. The side view which made the attachment part of the imaging part and main body of the portable terminal with a camera shown in FIG. Sectional drawing of the locking mechanism of the portable terminal with a camera shown in FIG. The block diagram which shows the outline of a structure of the portable terminal with a camera shown in FIG. The figure which shows the distortion which the light which injected into the optical system with the angle (theta) arises in the position away from the focal distance f. The figure which shows the relationship between real image height z and the distortion a in (a)-(c), respectively. The figure which each shows the image image when a square lattice receives distortion. The figure which shows the relationship between real image height z and the shading D to (a)-(b), respectively. The flowchart which shows the imaging sequence of the portable terminal with a camera shown in FIG. The flowchart which shows the imaging sequence of the portable terminal with a camera of 2nd Embodiment which concerns on this invention. The disassembled perspective view which shows the mobile telephone with a camera of 3rd Embodiment which concerns on this invention. FIG. 12 is a side view of the camera-equipped mobile terminal shown in FIG. Sectional drawing which shows the imaging part of the portable terminal with a camera shown in FIG. 11, and its periphery. The block diagram which shows the outline of a structure of the portable terminal with a camera shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 1a ... Portable terminal with camera (imaging system), 2 ... Main body part, 2a ... Mounting part, 3 ... Imaging part (lens unit, optical unit), 3z ... Imaging part with zoom (imaging part, lens unit, optical unit) 10 ... imaging optical system, 21 ... imaging element, 22 ... recording section, 27 ... sequence control circuit (operation control means, wireless communication control means, main body side control section), 31 ... imaging section side engagement section, 32 DESCRIPTION OF SYMBOLS ... Main body side engaging part, 42 ... Image output part, 43 ... Data output part, 47 ... Image input part, 48 ... Data input part, 60 ... Operation member group, 80 ... Wireless communication means, 91 ... Light output part, 92 DESCRIPTION OF SYMBOLS ... Light input part, 101 ... Image correction circuit (correction calculating means), 200 ... Base station, A ... Imaging plane.

Claims (9)

An imaging system having a replaceable imaging unit and a main body provided with a mounting unit for mounting the imaging unit,
The imaging unit
An imaging optical system that forms an object image on the imaging surface by the incident light beam from the object;
An image sensor disposed on the imaging plane for converting the object image into image data;
A recording unit for recording identification data set in the imaging unit;
An image output unit that outputs image data output from the image sensor to the main body unit;
A data output unit for outputting the identification data recorded in the recording unit to the main body unit;
An imaging unit side engagement unit for mounting the imaging unit on the mounting unit;
The main body is
An image input unit to which image data output from the image output unit is input;
A data input unit to which identification data output from the data output unit is input;
Wireless communication means for wireless communication with a base station;
Wireless communication control means for transmitting identification data input from the imaging unit to the base station via the wireless communication means and receiving optical correction data corresponding to the identification data from the base station;
Correction calculation means for correcting the image data input from the imaging unit with optical correction data received from the wireless communication means;
An imaging system comprising: a main body side engaging portion that fits with the imaging portion side engaging portion and fixes the imaging portion to the attachment portion of the main body portion. An imaging system having an interchangeable lens unit and a main body provided with a mounting portion for mounting the lens unit,
The lens unit is
An imaging optical system that forms an object image on the imaging surface by the incident light beam from the object;
A light output unit for outputting a light beam from the imaging optical system;
A recording unit for recording the identification data set in the lens unit;
A data output unit for outputting the identification data recorded in the recording unit to the main body unit;
A lens unit side engaging portion for mounting the lens unit on the mounting portion;
The main body is
A light input unit to which a light beam output from the light output unit is input;
An image sensor for receiving a light beam input to the light input unit and converting an object image formed by the imaging optical system into image data;
A data input unit to which identification data output from the data output unit is input;
Wireless communication means for wireless communication with a base station;
Wireless communication control means for transmitting the identification data input from the lens unit to the base station via the wireless communication means and receiving optical correction data corresponding to the identification data from the base station;
Correction calculation means for correcting the image data input from the image sensor with optical correction data received from the wireless communication means;
An imaging system comprising: a main body side engaging portion that is fitted to the lens unit side engaging portion and fixes the lens unit to the mounting portion of the main body portion. An imaging system having a replaceable imaging unit and a main body provided with a mounting unit for mounting the imaging unit,
The imaging unit
An imaging optical system that forms an object image on the imaging surface by the incident light beam from the object;
An image sensor disposed on the imaging plane for converting the object image into image data;
A recording unit for recording identification data set in the imaging unit;
An image output unit that outputs image data output from the image sensor to the main body unit;
A data output unit for outputting the identification data recorded in the recording unit to the main body unit;
An imaging unit side engagement unit for mounting the imaging unit on the mounting unit;
The main body is
An image input unit to which image data output from the image output unit is input;
A data input unit to which identification data output from the data output unit is input;
Wireless communication means for wireless communication with a base station;
Wireless communication control means for transmitting the identification data input from the imaging unit to the base station via the wireless communication means, and receiving data relating to operation permission corresponding to the identification data from the base station;
Operation control means for controlling the operation of the imaging unit based on data relating to operation permission from the wireless communication means;
An imaging system comprising: a main body side engaging portion that fits with the imaging portion side engaging portion and fixes the imaging portion to the attachment portion. An imaging system having an interchangeable lens unit and a main body provided with a mounting portion for mounting the lens unit,
The lens unit is
An imaging optical system that forms an object image on the imaging surface by the incident light beam from the object;
A light output unit for outputting a light beam from the imaging optical system;
A recording unit for recording the identification data set in the lens unit;
A data output unit for outputting the identification data recorded in the recording unit to the main body unit;
A lens unit side engaging portion for mounting the lens unit on the mounting portion;
The main body is
A light input unit to which a light beam output from the light output unit is input;
An image sensor for receiving a light beam input to the light input unit and converting an object image formed by the imaging optical system into image data;
A data input unit to which identification data output from the data output unit is input;
Wireless communication means for wireless communication with a base station;
Wireless communication control means for transmitting identification data input from the lens unit to the base station via the wireless communication means, and receiving data relating to operation permission corresponding to the identification data from the base station;
Operation control means for controlling the operation of the lens unit based on data relating to operation permission from the wireless communication means;
An imaging system comprising: a main body side engaging portion that is fitted to the lens unit side engaging portion and fixes the lens unit to the mounting portion of the main body portion. A main body that exposes the operating member group;
An optical unit that is selected from a plurality of different specifications according to imaging conditions and used in a state of being attached to a mounting portion provided in the main body;
An imaging optical system that forms an object image on an imaging surface with a light beam that is built into the optical unit and incident from the object;
An image sensor that is disposed on the imaging plane and converts the object image into image data;
A recording unit that is mounted on the optical unit and records identification data set in the optical unit;
A data output unit provided in the optical unit for outputting the identification data to the main body;
A data input unit provided in the main body unit to which the identification data is input;
Wireless communication means provided in the main body for wireless communication with a base station;
The identification data input to the main body from the data input unit is transmitted to the base station, and a control signal returned from the base station corresponding to the transmitted identification data is received via the wireless communication unit. Wireless communication control means;
An imaging system comprising: a main body side control unit that controls an imaging operation based on the control signal.   2. The imaging according to claim 1, wherein the main body side control unit receives optical correction data of the imaging optical system as a control signal returned in response to the identification data of the optical unit. system.   2. The imaging according to claim 1, wherein the main body side control unit receives data relating to operation permission for imaging by the optical unit as a control signal returned in response to the identification data of the optical unit. system. An exchangeable imaging unit used in a state of being attached to a mounting part provided in a main body of an imaging system having a wireless communication unit and acquiring a control signal related to imaging from a base station by the wireless communication unit,
An imaging optical system that forms an object image on the imaging surface by the incident light beam from the object;
An image sensor disposed on the imaging plane for converting the object image into image data;
A recording unit for recording identification data set in the imaging unit to be transmitted to the base station by the wireless communication means;
An image output unit that outputs image data output from the image sensor to the main body unit;
A data output unit for outputting the identification data recorded in the recording unit to the main body unit;
An imaging unit comprising: an imaging unit side engaging unit for mounting the imaging unit on the attachment unit. An interchangeable lens unit that is used in a state of being attached to a mounting portion provided in a main body of an imaging system that has wireless communication means and obtains a control signal related to imaging from a base station by the wireless communication means,
An imaging optical system that forms an object image on the imaging surface by the incident light beam from the object;
A light output unit for outputting a light beam from the imaging optical system;
A recording unit for recording identification data set in the lens unit to be transmitted to the base station by the wireless communication means;
A data output unit for outputting the identification data recorded in the recording unit to the main body unit;
A lens unit comprising: a lens unit side engaging portion for mounting the lens unit on the mounting portion.

Images