JP2015002483A - Imaging system, imaging apparatus, optical apparatus, and imaging system control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a period until performing optical correction by improving the efficiency of transfer of optical correction data between an imaging apparatus and an optical apparatus.SOLUTION: The optical apparatus detachably attached to the imaging apparatus transfers, to the imaging apparatus, optical correction data on individual lenses included in an imaging optical system, a classification ID being an identifier provided to each type of optical apparatus, and an individual ID being an identifier provided to each optical apparatus. When a communication history in which a classification ID transferred from the optical apparatus matches but an individual ID transferred from the same does not match is included in a record, the imaging apparatus selects optical correction data correlated with a matching classification ID and causes optical correction means to perform the optical correction.

Description

  The present invention relates to an imaging system, an imaging apparatus, an optical apparatus, and a control method for the imaging system, which include an imaging apparatus and an imaging optical system, and communicate optical correction data between optical apparatuses that are detachably attached to the imaging apparatus. It is about.

  Conventionally, in the imaging apparatus proposed in Patent Document 1, optical correction data provided in a lens unit in an interchangeable lens camera system is transmitted to the camera unit through an electrical contact between the lens unit and the camera unit, and is provided in the camera unit. Optical correction is performed by an optical correction circuit. Furthermore, in the above proposal, the transfer order of the optical correction data to be transmitted is changed according to the setting conditions of the lens parameters such as the aperture and focal length of the lens unit, and the optical correction data corresponding to the currently set lens parameters is given priority. Send to. Thus, the optical correction of the currently set lens parameter can be performed quickly.

JP 2011-124916 A

  However, in recent years, the number of pixels of an image sensor provided in a camera has increased, and the size of a camera system including a lens tends to be equal or even smaller.

  Increasing the number of pixels in the camera can provide a higher-definition captured image, but higher-definition results in imaging of optical distortion and aberrations that could not be reproduced until now. Therefore, it tends to lead to an increase in the size and cost of the imaging optical system.

  In addition, as described above, the size of the camera system is required to be scaled down, and there is a conflicting tendency that the optical performance of the imaging optical system is reduced for downsizing and the lens is downsized.

  Therefore, the optical correction performance of the captured image required for the camera is important, and a correction amount and correction accuracy that are higher than conventional ones are required.

  When it is assumed that high-precision optical correction is performed, more optical correction data is required to realize fine correction. In some cases, it is assumed that even for lenses of the same design, optical correction data for each individual lens is required to correct the optical performance difference due to individual manufacturing variations.

  When the optical correction data increases in this way, the transmission amount of the optical correction data by electrical communication between the lens and the camera increases, and the time required to transfer the optical correction data used in the optical correction circuit increases. It also takes time from the start of the system until the optical correction is performed.

(Object of invention)
An object of the present invention is to provide an imaging system, an imaging apparatus, an optical apparatus, and an imaging system that can improve the efficiency of transfer of optical correction data between the imaging apparatus and the optical apparatus, and can reduce the time until optical correction is performed It is to provide a control method of an imaging system.

  In order to solve the above-described object, an imaging system of the present invention includes an imaging device including an imaging device, and an optical device that includes an imaging optical system and is detachably attached to the imaging device. An imaging system for communicating data between optical devices, wherein the optical device stores correction data storage means for storing optical correction data for each lens included in the imaging optical system, and for each type of optical device. An ID storage unit that stores a type ID that is an identifier provided and an individual ID that is an identifier provided for each of the optical devices, the optical correction data, the type ID, and the individual ID to the imaging device Control means for controlling transfer, and the imaging apparatus stores the optical correction data transferred from the optical device in association with the type ID and the individual ID Lens data storage means for recording the memory as a communication history, optical correction means for correcting a captured image using the optical correction data, and the individual ID that matches the type ID transferred from the optical device Control means for selecting optical correction data associated with the matching type ID and causing the optical correction means to perform optical correction when there is a communication history that does not match in the record of the lens data storage means. It is what.

  According to the present invention, it is possible to improve the efficiency of transferring optical correction data between the imaging apparatus and the optical apparatus, and it is possible to reduce the time required for performing optical correction.

1 is a block diagram illustrating a configuration of an imaging system that is Embodiment 1 of the present invention. FIG. 6 is a flowchart for explaining the operation of the camera microcomputer according to the first embodiment. 3 is a flowchart for explaining the operation of the lens microcomputer of Embodiment 1. It is a flowchart explaining the one part step of FIG. It is a flowchart explaining the one part step of FIG. It is a figure explaining the various data memorize | stored with the camera unit of Example 1. FIG. It is a flowchart explaining operation | movement of the camera microcomputer in Example 2 of this invention. 6 is a flowchart for explaining the operation of a lens microcomputer in Embodiment 2. It is a figure explaining the various data memorize | stored with the camera unit of Example 2. FIG.

  The mode for carrying out the present invention is as described in Examples 1 to 3 below.

  The present invention relates to an imaging system in which an imaging device (for example, a camera unit) and an optical device (for example, a lens unit) are detachable. FIG. 1 is a block diagram illustrating a configuration of a first embodiment that is an imaging system including a camera unit and a lens unit that can be separated and replaced.

  In the figure, an alternate long and short dash line 160 represents the boundary between the camera unit CU and the lens unit LU. The camera unit CU and the lens unit LU have a mount mechanism that can be separated and combined, and can be configured by combining different camera units CU or lens units LU. The LU communication circuit 150 and the CU communication circuit 151 for transmitting electrical information of the lens unit LU and the camera unit CU, respectively, once convert the input electrical signal into serial data, and from the lens unit LC to the camera unit CU, or An electrical contact is provided for transmission to the opposite side. The zoom lens 111 and the focus lens 113 constitute an imaging optical system, and form an image on an imaging surface of an imaging element 101 such as a CMOS sensor that performs photoelectric conversion on an image of a subject. The diaphragm 112 is provided to vary the amount of light passing through the zoom lens 111 and the focus lens 113.

  The optical correction unit 102 electrically corrects optical characteristics such as aberration, decrease in peripheral light amount, optical distortion, resolution change, shading, and the like of the image signal photoelectrically converted by the image sensor 101 based on the input optical correction value. . The camera signal processing unit 103 converts the imaging signal corrected by the optical correction unit 102 into, for example, a standard video signal. The recorder 104 includes an image memory that records the standard video output signal obtained by the camera signal processing unit 103. The viewfinder 105 displays the standard video output signal obtained by the camera signal processing unit 103.

  The zoom encoder 114 detects the focal length of the zoom lens 111. The focus encoder 116 detects the focus position of the focus lens 113. The aperture encoder 115 detects an aperture value that is the aperture diameter of the aperture 112. The ID storage unit 131 stores the type ID and individual ID of the lens unit LU. The type ID is assigned as an identifier assigned to each lens unit of the same type of optical design value of the lens unit LU, and the individual ID is assigned as a unique identifier provided for each lens unit. The optical correction data storage unit 132 stores different optical correction data for each lens included in the lens unit as a data table, and all the lens parameters that are optical characteristics that the zoom lens 111, the focus lens 113, and the aperture 112 can take. With optical correction data.

  The lens data storage unit 133 stores the type ID, individual ID, and optical correction data of the lens unit transferred from the lens unit CU in association with each other.

  The lens microcomputer 121 is provided on the lens unit LU side, and acquires the lens parameters, the type ID, the individual ID, the optical correction data, and the lens parameters acquired from the encoders via the LU communication circuit 150 and the CU communication circuit 151, and the camera microcomputer 122. Forward to.

  The camera microcomputer 122 is provided on the camera unit CU side, and acquires the type ID, individual ID, optical correction data, and lens parameters obtained from each encoder from the lens microcomputer 121 through the LU communication circuit 150 and the CU communication circuit 151. In addition, the camera microcomputer 122 records or reads the acquired data in the lens data storage unit 133 and supplies the data to the optical correction unit 102 as an optical correction value. Further, mute control of the camera signal processing unit 103 and display control of the finder 105 are performed.

Next, the operation of each unit will be described in order.
When a power supply (not shown) is turned on with the camera unit CU and the lens unit LU attached, the type ID of the lens unit LU is transmitted from the ID storage circuit 131 through the lens microcomputer 121, the LU communication circuit 150, and the CU communication circuit 151. The individual ID is transferred to the camera unit CU side. The type ID and individual ID transferred to the camera unit CU side are collated with the type ID and individual ID of the camera unit CU connected so far by the camera microcomputer 122 and then stored in the lens data storage unit 133. The camera microcomputer 122 determines whether to instruct the lens microcomputer 121 to transfer optical correction data based on the result of collation of the type ID and individual ID of the lens unit LU. Further, the camera microcomputer 122 transfers the optical correction data to the optical correction unit 102 using the optical correction data stored in the lens data storage unit 133 based on the type ID and individual ID of the lens unit LU, and executes optical correction.

  When optical correction is performed by the optical correction unit 102, the lens microcomputer 121 detects the currently set values of each optical parameter and transfers the values of these lens parameters to the optical correction unit 102 via the camera microcomputer 122. . Specifically, the lens microcomputer 121 reads the focal length of the zoom lens 111 of the lens unit LU, the aperture amount of the aperture 112, and the focus position of the focus lens 113 from the values of the zoom encoder 114, the iris encoder 115, and the focus encoder 115, respectively. , Do the transfer. The optical correction unit 102 selects data to be used for correction from the transferred lens parameter values as optical correction values, and performs optical correction.

  The optically corrected captured image is subjected to signal processing by the camera signal processing unit 103, recorded as a standard video signal in the recorder 104, and displayed on the finder 105. The camera microcomputer 122 displays the control state of the optical correction unit 102 on the viewfinder 105 together with the standard video signal. As will be described later, the control state of the optical correction unit 102 is information such as whether or not optical correction is being performed and whether or not the correction is more optimal.

  The above operation will be described in detail with reference to the flowcharts shown in FIGS.

  The flowchart shown in FIG. 2 mainly explains the operation of the camera microcomputer 122 of the camera unit CU. Step 201 is the beginning of this flowchart, and is repeatedly executed at a predetermined timing after the power is turned on. The predetermined timing may be, for example, a timing that matches the vertical synchronization period of the video signal. In step 202, it is determined whether or not the lens unit LU is attached to the camera unit CU. Specifically, if the camera microcomputer 122 and the lens microcomputer 121 normally start communication through the communication circuits 150 and 151, the attachment of the lens unit LU is determined with the establishment of the communication. If the lens unit LU is attached, the process ends at step 203. If the lens unit LU is not attached, the process ends at step 233.

  In step 203, the camera microcomputer 122 requests the lens microcomputer 121 to transfer the type ID and the individual ID stored in the ID storage unit 131 of the lens unit LU connected to the camera unit CU, and acquires them. In step 204, it is determined whether or not the acquired individual ID of the lens unit LU has already been recorded in the lens data storage unit 133 as a communication history. If there is a record in the lens data storage unit 133, the process proceeds to step 231, and if there is no record, the process proceeds to step 205. In step 205, it is determined whether or not the acquired lens unit LU type ID has already been recorded in the lens data storage unit 133 as a communication history. If there is a record in the lens data storage unit 133, the process proceeds to step 221, and if there is no record, the process proceeds to step 206.

  In step 206, it is determined whether or not all of the optical correction data provided in the lens unit LU has been transferred to the camera unit CU.

  When the communication of the optical correction data is completed, a data end code is added to the end of the optical correction data provided in the lens unit LU, and the camera microcomputer 122 determines the completion of transfer by the lens microcomputer 121 upon receipt of the data end code.

  If the transfer has been completed, the process proceeds to step 209. If the transfer has not been completed, the process proceeds to step 207. In step 207, the optical correction data stored in the optical correction data storage unit 132 in the lens unit LU is transferred to the camera microcomputer 122 via the lens microcomputer 121, the communication circuit 150, and 151 in response to a request from the camera microcomputer 122. . Here, since the amount of optical correction data is large, and it is assumed that it takes time to exceed the repetition cycle of this flow when it is continuously transferred at once, the optical correction data to be transferred is divided into a plurality of The flow is set to a data transfer amount that is sufficiently within the repetition period. In step 208, the optical correction data acquired by the camera microcomputer 122 in step 207 is stored in the lens data storage unit 133. When storing, the optical correction data that has already been stored is not overwritten, but is always stored anew.

  Step 209 is executed after the transfer of all the optical correction data provided in the lens unit LU to the camera unit CU is completed. The camera microcomputer 122 newly stores the acquired type ID and individual ID in the lens data storage unit 133 in the camera unit CU in association with the optical correction data that has been transferred. Accordingly, since the individual ID and type ID are recorded as the connection history in the lens data storage unit 133 thereafter, when the same lens unit LU is connected, it is determined that the history is recorded in the determination branch shown in step 204, and step 231 is performed. It will branch to.

  In step 210, the optical correction data stored in the lens data storage unit 133 is used, the optical correction unit 102 selects an optical correction value from the optical correction data via the camera microcomputer 122, and optical correction is performed. In step 211, the captured image that has been optically corrected by the optical correction unit 102 is processed by the camera signal processing unit 103, and the video is output to the subsequent recorder 104 and viewfinder 105. Specifically, all the optical correction data is acquired in the camera unit CU, and after the captured image has been corrected, the mute of the video mute circuit included in the camera signal processing unit 103 is released and the video is output.

  In step 221, since only the type ID matches as the history, first, optical correction data with the same type ID is selected from the lens data storage unit 133, and the optical correction unit 102 performs correction. At this time, when there are a plurality of the same type IDs stored in the lens data storage unit 133, for example, the optical correction data of the same machine ID stored last is used, or the same type ID stored is stored. All average values are used as optical correction data. In step 222, the camera signal processing unit 103 processes the captured image that has been optically corrected by the optical correction unit 102, and the video signal mute provided in the camera signal processing unit 103 so as to output this video to the subsequent recorder 104 and viewfinder 105. Unmute the circuit and output the video. In step 223, it is determined whether or not all of the optical correction data provided in the lens unit LU has been transferred to the camera unit CU. If the transfer has been completed, the process proceeds to step 227. If the transfer has not been completed, the process proceeds to step 224. In step 224, the optical correction data stored in the optical correction data storage unit 132 in the lens unit LU is transferred to the camera microcomputer 122 via the lens microcomputer 121 and the communication circuits 150 and 151 in response to a request from the camera microcomputer 122. Here, since the amount of optical correction data is large, and it is assumed that it takes time to exceed the repetition cycle of this flow when it is continuously transferred at once, the optical correction data to be transferred is divided into a plurality of The flow is set to a data transfer amount that is sufficiently within the repetition period. In step 225, the optical correction data acquired by the camera microcomputer 122 in step 224 is stored in the lens data storage unit 133.

  In step 227, the type ID and individual ID acquired by the camera microcomputer 122 are newly stored in the lens data storage unit 133 in the camera unit CU in association with the optical correction data that has been transferred. Therefore, the optical correction data acquired by the camera unit CU is stored in the lens data storage unit 133, and the optical correction data being corrected is sequentially replaced by sequentially transferring the optical correction data to the optical correction unit 103. The above operation is continuously executed in a state where a camera image is displayed. However, since the optical correction data is replaced between the camera units CU having the same type ID having the same optical correction characteristics, the optical correction data is replaced. The change in the correction effect is not large.

  Step 231 is a step that proceeds when the individual ID of the lens unit LU acquired by the camera microcomputer 122 is already recorded in the lens data storage unit 133 as a connection history. That is, this is a step that proceeds when a previously mounted lens unit is mounted again. At this point, the optical correction data is already stored in the lens data storage unit 133. Therefore, the camera unit CU does not need to transfer the optical correction data from the lens unit LU anew. The camera unit CU uses the optical correction data associated with the individual ID of the connected lens unit LU and stored in the lens data storage unit 133. The optical correction unit 102 performs correction. In step 232, the camera signal processing unit 103 processes the captured image that has been optically corrected by the optical correction unit 102, and the video mute provided in the camera signal processing unit 103 so as to output the video to the subsequent recorder 104 and viewfinder 105. Unmute the circuit and output the video.

  The flowchart shown in FIG. 3 mainly explains the operation of the lens microcomputer 121 of the lens unit LU. Step 251 is the beginning of this flowchart. This flow is executed when the camera unit CU is mounted and power (not shown) is supplied.

  In step 252, it is determined whether there is a communication request from the camera unit CU. Specifically, it is determined whether or not a communication request is generated from the camera microcomputer 122 to the lens microcomputer 121 through the communication circuits 150 and 151. If there is no communication request, step 252 is repeated to wait for the communication request. When a communication request is generated, the process proceeds to step 253. In step 253, the content of the communication request from the camera unit CU is determined. Specifically, it is determined whether the information requested by the camera microcomputer 122 is any one of the ID of the lens unit LU, the optical correction data, or the current lens parameter value. If each ID of the lens unit LU is requested, the process proceeds to step 254. If optical correction data is requested, the process proceeds to step 255. If lens parameters are requested, the process proceeds to step 256.

  In step 254, the lens ID of the lens unit LU and the type ID are read by the lens microcomputer 121 from the ID storage unit 131 and transferred to the camera microcomputer 122 through the communication circuits 150 and 151. In step 255, the lens microcomputer 121 reads the optical correction data stored in the correction data storage unit 132 and transfers it to the camera microcomputer 122 through the communication circuits 150 and 151 in order to transfer the optical correction data of the lens unit LU to the camera unit CU. Forward.

  In step 256, the lens microcomputer 121 reads the value detected by the zoom encoder 114 of the current focal length of the zoom lens 111. In step 257, the lens microcomputer 121 reads the value detected by the aperture encoder 115 that detects the current aperture value of the aperture 112. In step 258, the lens microcomputer 121 reads the value detected by the focus encoder 116 at the current focus position of the focus lens 113. In step 259, the currently set lens parameter value of the lens unit LU is transferred from the lens microcomputer 121 to the camera microcomputer 122 through the communication circuits 150 and 151.

  The flowchart shown in FIG. 4 explains the processing of “correction with stored individual data” shown in steps 210 and 231 of the flowchart shown in FIG. The meaning of “correction with stored individual data” is the optical correction selected from the optical correction data by the optical correction unit 102 via the camera microcomputer 122 using the optical correction data stored in the lens data storage unit 133 as described above. The optical correction is performed according to the value. In this flow, step 271 is the start of this flow, and is executed at the time of correction (steps 210 and 231) with the stored individual data.

  In step 272, a data transfer request and data transfer are performed to the lens unit LU in order to obtain the lens parameters of the lens unit LU currently set. In step 273, the lens data storage unit 133 is referred to from the optical correction data to be corrected and the acquired current lens parameter values, and an optical correction value used for optical correction is acquired from the stored optical correction data. (select). For the optical correction data to be corrected, refer to the optical correction data having the same individual ID of the camera unit CU.

  Here, an optical correction value used for optical correction will be described. The optical correction value is a correction amount when the optical correction unit 102 electrically corrects optical characteristics such as aberration, decrease in peripheral light amount, optical distortion, resolution change, shading, etc., and is currently set from the optical correction data. Is selected or calculated based on the lens parameters.

  As described above, the lens parameter includes the aperture value, the focal length, and the encoder information of the in-focus position provided in the lens unit LU. For example, the optical correction data is data of an array structure such as a look-up table, and a correction value (= optical correction value) used for optical correction can be selected using a lens parameter as an argument.

  In step 274, the optical correction value set in the optical correction unit 102 is changed to the optical correction value acquired in step 273. As a result, optical correction suitable for the current lens parameters can be performed.

  The flowchart shown in FIG. 5 explains the “correction by storage type data” process shown in step 221 of the flowchart shown in FIG. The meaning of “correction by storage type data” is that optical correction data having the same type ID is selected from the lens data storage unit 133 and correction is performed by the optical correction unit 102 as described above. In this flow, step 281 is the start of this flow, and is executed at the time of correction (step 221) with the storage type data.

  In step 282, it is determined whether or not it is necessary to secure a new recording area for storing the optical correction data transferred from the lens unit LU in the lens data storage unit 133. This recording area securing process is performed only once when a lens unit having a different individual ID is newly attached. In step 283, the recording area of the lens data storage unit 133 is secured, and the optical correction data having the same type ID is copied to the secured area. In step 284, a data transfer request and data transfer are performed to the lens unit LU in order to obtain the lens parameters of the lens unit LU currently set. In step 285, the lens data storage unit 133 is referred to from the optical correction data to be corrected and the acquired current lens parameter values, and optical correction values used for optical correction are acquired from the stored optical correction data. (select). The optical correction data to be corrected refers to the optical correction data stored in the area secured in step 283. In step 286, the optical correction value set in the optical correction unit 102 is changed to the optical correction value acquired in step 273. As a result, optical correction suitable for the lens parameters can be performed.

  A change in data stored in the lens data storage unit 133 when the optical correction (step 221) is executed with the optical correction data for each type ID will be described with reference to FIG.

  FIG. 6A to FIG. 6E are schematic diagrams in which changes in data stored in the lens data storage unit 133 are described in order, and FIGS. 6A to 6C are schematic views. The data recorded in the order of time in (e) changes. The common part of the figure will be described first.

  Reference numeral 350 denotes a data storage area of the lens data storage unit 133.

  Reference numerals 301, 302, and 303 denote lens unit type IDs, individual IDs, and optical correction data that are already stored in the lens data storage unit 133.

  Similarly, 311, 312, and 313 indicate the type ID, individual ID, and optical correction data of other lens units that are already stored in the lens data storage unit 133.

  Here, the data group indicated by the type ID 301, the individual ID 302, and the optical correction data 303 stores the type ID = A, the individual ID = A-1, and the data specific to A-1 as optical correction data in association with each other. .

  Similarly, the type ID 311, the individual ID 312, and the optical correction data 313 are also stored in association with the type ID = B, the individual ID = B−1, and the data specific to B−1 as the optical correction data.

  The stored type ID, individual ID, and optical correction data are already stored in the lens data storage unit 133 because they are connected to the lens unit having the target individual ID once in the past.

  In the state shown in FIG. 6A, as described above, the lens unit of type ID = A and individual ID = A-1 and the lens of type ID = B and individual ID = B-1 have been connected in the past. Only the type ID, individual ID, and optical correction data are stored.

  Here, when a new lens of type ID = A and individual ID = A-2 is attached, when matching with each ID recorded in the lens data storage unit 133, it matches with type ID = A, and individual ID = A−. Since 2 is inconsistent, the processing after step 221 in the flowchart shown in FIG. 2 is performed. First, in step 282 as part of the processing in step 221, a new storage area is provided in the data storage area 350 of the lens data storage unit 133, and the optical correction data of individual ID = A-1 having the same type ID is provided. A-1 is copied as new optical correction data 323. This state is shown in FIG.

  Next, the optical correction data 323 copied from the current lens parameters is set as optical correction data used for temporary optical correction, and optical correction is performed by the optical correction unit 102. As shown in step 222, the camera image is output. Done. Later, as steps 224 and 225, the optical correction data 323 of the lens unit LU with the individual ID = A−2 attached to the camera unit CU is transferred to the camera unit CU and copied to the lens data storage unit 133. Are sequentially overwritten. This state is shown in FIG. Reference numeral 333 denotes acquired optical correction data newly transferred from the lens unit LU.

  Therefore, depending on the selection of the optical correction data used for the next optical correction, either the copied optical correction data 323 or the newly transferred acquired optical correction data 333 is used. The newly acquired acquired optical correction data 333 is transferred to the optical correction data 333 after repeating the transfer of the optical correction data from the lens unit LU. Correction is performed. This state is shown in FIG. Further, when the transfer of the optical correction data 333 is completed, in step 227, the individual ID (A-2) 332 and the type ID (A) 331 are stored in association with the optical correction data 333 that has been transferred. This state is shown in FIG.

  As described above, it is possible to improve the efficiency of transferring the optical correction data between the lens unit LU and the camera unit CU and to shorten the time until the optical correction is performed.

  A second embodiment of the present invention will be described.

  In the first embodiment, individual optical correction data is provided for each lens unit, and all of the optical correction data is always transferred when the camera unit CU and the lens unit LU are connected in a new combination. On the other hand, in the second embodiment, the optical correction data includes two different data, that is, the common optical correction data for each type and the individual optical correction data different for each individual, so that only the individual ID is different. There is a difference in reducing the amount of data communication when the camera is mounted on the camera unit. Specifically, the type optical correction data is optical correction data based on the optical design, and all the lens units with the same optical design are common, and if the lens unit assembly finish is as designed, only the type optical correction data is used. Can be used for optical correction. However, in general, there is a difference in the finished assembly of each lens unit. Specifically, there are slight deviations in the assembly of the individual lenses constituting the lens unit and variations in optical coating characteristics. A characteristic difference from the optical design value of each lens unit is provided as individual optical correction data. Therefore, it is possible to optically correct the optical design value by the type optical correction data, and further, it is possible to correct differences that differ for each lens unit by using the individual optical correction data in accordance with the type optical correction data.

  In the second embodiment, the block diagram configured is the same as that in FIG.

  The operation of the second embodiment will be described with reference to the flowcharts shown in FIGS.

  The flowchart shown in FIG. 7 mainly explains the operation of the camera microcomputer 122 of the camera unit CU. Step 401 is the beginning of this flowchart, and is repeatedly executed at a predetermined timing after the power is turned on. The predetermined timing may be, for example, a timing that matches the vertical synchronization period of the video signal.

  In step 402, it is determined whether or not the lens unit LU is attached to the camera unit CU. Specifically, when the camera microcomputer 122 and the lens microcomputer 121 normally start communication through the communication circuits 150 and 151, the attachment of the lens unit LU is determined with the establishment of the communication. If the lens unit LU is attached, the process proceeds to step 403. If the lens unit LU is not attached, the process ends at step 433. In step 403, the type ID and the individual ID stored in the ID storage unit 131 of the lens unit LU connected to the camera unit CU are requested from the camera microcomputer 122 to the lens microcomputer 121 and acquired.

  In step 404, it is determined whether or not the individual ID of the lens unit LU acquired by the camera microcomputer 122 has already been recorded in the lens data storage unit 133 as a communication history. If there is a record in the lens data storage unit 133, the process proceeds to step 431, and if there is no record, the process proceeds to 405. In step 405, it is determined whether the type ID of the lens unit LU acquired by the camera microcomputer 122 has already been recorded in the lens data storage unit 133 as a communication history. If there is a record in the lens data storage unit 133, the process proceeds to step 421, and if there is no record, the process proceeds to step 406.

  In step 406, it is determined whether or not all of the type optical correction data provided in the lens unit LU has been transferred to the camera unit CU. If the transfer has been completed, the process proceeds to step 409. If the transfer has not been completed, the process proceeds to step 407. In step 407, the type optical correction data stored in the correction data storage unit 132 is transferred to the camera microcomputer 122 via the lens microcomputer 121, the communication circuit 150, and 151 in response to a request from the camera microcomputer 122. Here, since the type optical correction data capacity is large and it is assumed that it takes time to exceed the repetition period of this flow when continuously transferring at once, the type optical correction data to be transferred is divided into a plurality of The flow is set so that the data transfer amount is sufficiently within the repetition period. In step 408, the type optical correction data acquired by the camera microcomputer 122 in step 407 is stored in the lens data storage unit 133. When storing, other optical correction data that has already been stored is not overwritten, but must be newly stored.

  Step 409 is executed after the transfer of all the type optical correction data provided in the lens unit LU to the camera unit CU is completed. In step 409, the type ID acquired by the camera microcomputer 122 is newly stored in the lens data storage unit 133 in the camera unit CU in association with the type optical correction data for which transfer has been completed. Therefore, since only the type ID of the lens unit LU as the connection history remains in the lens data storage unit 133, when the same lens unit LU is connected, the type ID history is recorded in the determination branch shown in step 405. Thereafter, the process branches to step 421. In step 410, optical correction is performed by the optical correction unit 102 via the camera microcomputer 122 using the type optical correction data stored in the lens data storage unit 133. In step 411, the captured image subjected to the type optical correction in the optical correction unit 102 is processed in the camera signal processing unit 103, and the video is output to the subsequent recorder 104 and finder 105. Specifically, after the correction based on the optical design value of the captured image is completed, the mute of the video mute circuit included in the camera signal processing unit 103 is released, and the video is output.

  In step 421, first, the type optical correction data having the same type ID is selected from the lens data storage unit 133, and the optical correction unit 102 performs correction. In step 422, the camera signal processing unit 103 processes the captured image subjected to the type optical correction by the optical correction unit 102, and the video included in the camera signal processing unit 103 to output the video to the subsequent recorder 104 and viewfinder 105. Unmute the mute circuit and output the video.

  In step 423, it is determined whether or not all of the individual optical correction data provided in the lens unit LU has been transferred to the camera unit CU. If the transfer has been completed, the process proceeds to step 427. If the transfer has not been completed, the process proceeds to step 424. In step 424, the individual optical correction data stored in the lens data storage unit 132 in the lens unit LU is transferred to the camera microcomputer 122 via the lens microcomputer 121, the communication circuits 150, and 151 in response to a request from the camera microcomputer 122. Here, since the individual optical correction data capacity is large and it is assumed that it takes time exceeding the repetition period of this flow when continuously transferred at once, the individual optical correction data to be transferred is divided into a plurality of The flow is set so that the data transfer amount is sufficiently within the repetition period. In step 425, the individual optical correction data acquired by the camera microcomputer 122 in step 424 is stored in the lens data storage unit 133.

  In step 427, the type ID and individual ID acquired by the camera microcomputer 122 are newly stored in the lens data storage unit 133 in association with the individual optical correction data that has been transferred. In step 428, the optical correction unit 102 performs optical correction via the camera microcomputer 122 using the type optical correction data and the individual optical correction data stored in the lens data storage unit 133. Optical correction using individual optical correction data is converted into individual optical correction data for each lens unit LU, for example, by performing predetermined correction operations such as addition, subtraction, and multiplication of the individual optical correction data on the type optical correction data. Just do it.

  When the process proceeds to step 431, the individual ID of the lens unit LU acquired by the camera microcomputer 122 has already been recorded as a connection history in the lens data storage unit 133, that is, the lens unit LU that has been previously mounted. Therefore, the type optical correction data and the individual optical correction data are already stored in the lens data storage unit 133. Therefore, it is not necessary to transfer the type optical correction data and the individual optical correction data from the lens unit LU to the camera unit CU again, and is associated with the individual ID of the connected lens unit LU and stored in the lens data storage unit 133. The optical correction unit 102 performs correction using the optical correction data. In step 432, the captured image subjected to optical correction by the optical correction unit 102 is processed by the camera signal processing unit 103, and the video mute provided in the camera signal processing unit 103 so as to output the video to the subsequent recorder 104 and viewfinder 105. Unmute the circuit and output the video.

  The flowchart shown in FIG. 8 mainly explains the operation of the lens microcomputer 121 of the lens unit LU. Step 451 is the beginning of this flowchart. This flow is executed when the camera unit CU is mounted and power (not shown) is supplied.

  In step 452, it is determined whether or not there is a communication request from the camera unit CU. Specifically, it is determined whether or not a communication request is generated from the camera microcomputer 122 to the lens microcomputer 121 through the communication circuits 150 and 151. If there is no communication request, step 452 is repeated to wait for the communication request. When a communication request is generated, the process proceeds to step 453.

  In step 453, the content of the communication request from the camera unit CU is determined. Specifically, it is determined whether the information requested by the camera microcomputer 122 is any one of the ID of the lens unit LU, the optical correction data, or the current lens parameter value. If each ID of the lens unit LU is requested, the process proceeds to step 454. If optical correction data is supplied, the process proceeds to step 455. If the lens parameter is requested, the process proceeds to step 456.

  In step 454, the lens microcomputer 121 reads the lens unit individual ID and type ID from the ID storage unit 131 and transfers them to the camera microcomputer 122 through the communication circuits 150 and 151.

  In step 456, the lens microcomputer 121 reads the value detected by the zoom encoder 114 of the current focal length of the zoom lens 111. In step 457, the lens microcomputer 121 reads the value detected by the aperture encoder 115 that detects the current aperture value of the aperture 112. In step 458, the lens microcomputer 121 reads the value detected by the focus encoder 116 at the current focus position of the focus lens 113. In step 459, the lens parameter values currently set in the lens unit LU and acquired in the respective steps 456, 457 and 458 are transferred from the lens microcomputer 121 to the camera microcomputer 122 through the communication circuits 150 and 151.

  In step 460, the optical correction data to be transferred to the camera unit CU is determined. If the individual optical correction data is requested from the camera unit CU, the process proceeds to step 462, and if the type optical correction data is requested, the process proceeds to step 463. In step 462, the individual optical correction data stored in the lens data storage unit 132 is read by the lens microcomputer 121 and transferred to the camera microcomputer 122 through the communication circuits 150 and 151 in order to transfer the individual optical correction data. In step 463, the lens microcomputer 121 reads the type optical correction data stored in the lens data storage unit 132 and transfers it to the camera microcomputer 122 via the communication circuits 150 and 151 in order to transfer the type optical correction data.

  Data stored in the lens data storage unit 133 of the camera unit CU will be described with reference to FIG.

  FIGS. 9A, 9 </ b> B, 9 </ b> C, and 9 </ b> D are diagrams schematically illustrating data stored in the lens data storage unit 133. The common part of the figure will be described first.

  Reference numeral 350 denotes a data storage area of the lens data storage unit 133.

  Reference numerals 301, 302, 304, and 305 indicate lens type ID, individual ID, type optical correction data, and individual optical correction data that are already stored in the lens data storage unit 133.

  Similarly, 311, 312, 314, and 315 indicate the type ID, individual ID, type optical correction data, and individual optical correction data of other lens units already stored in the lens data storage unit 133.

  Here, the data group indicated by the type ID 301, the individual ID 302, the type optical correction data 304, and the individual optical correction data 305 is type ID = A, individual ID = A-1, A as type optical correction data, and as individual optical correction data. The data of A-1 are stored in association with each other.

  Here, considering that the lens unit having the type ID = B and the individual ID = B−1 is attached to the camera unit, the type ID is set to the type optical correction data (in step 408 in step 409 of the flowchart shown in FIG. 7). Stored in the lens data storage unit 133 in the camera unit CU. This state is shown in FIG. The type optical correction data 314 used for optical correction is newly stored together with the type ID = B, so that optical correction using the type optical correction data 314 becomes possible.

  When the step further advances and the transfer of the individual optical correction data is completed, the individual ID is recorded together with the previous type optical correction data and the type ID in association with the lens data storage unit 133, so that each ID record in step 427 is stored. At this time, the storage state shown in FIG. In this state, type optical correction data 314, individual optical correction data 315, type ID 311 and individual ID 312 used for optical correction are recorded, and appropriate optical correction using the type optical correction data 314 and individual optical correction data 315 can be performed.

  Lens data storage when a lens unit having a different individual ID is attached in the above state, that is, in a state where the type ID 311, the individual ID 312, the type optical correction data 314, and the individual optical correction data 315 are added and stored. A change in stored data of the unit 133 will be described. When a lens unit of type ID = A and individual ID = A−2, in which the type ID of the lens unit LU matches the type ID stored in the lens data storage unit 133 and the individual IDs do not match, is connected, FIG. In step 425 shown in FIG. 9, the state shown in FIG. FIG. 9C shows that new individual optical correction data (A-2) 325 is being stored in the lens data storage unit 133. In this state, the type optical correction data is corrected using the type optical correction data (A) 304.

  Further, when the transfer of the individual optical correction data (A-2) 325 is completed, the data of the lens unit LU having the individual ID (= A-2) stored in the lens data storage unit 133 is shown in FIG. It is expressed as follows.

  As described above, it is possible to improve the efficiency of transferring the optical correction data between the lens unit LU and the camera unit CU and to shorten the time until the optical correction is performed.

  A third embodiment of the present invention will be described.

  In the second embodiment, the lens unit having only the individual ID is attached to the camera unit by providing two different data, that is, the type optical correction data common to each type of optical correction data and the individual optical correction data different for each individual. In this case, after the type optical correction data is transferred for the first time, only the individual optical correction data is transferred as the optical correction data. In the second embodiment, since the type optical correction data is optical correction data based on a common optical design value, the above-described mechanism is established. In the third embodiment, all of the type optical correction data is provided in the camera unit CU in advance, and only the individual optical correction data is transferred when the lens unit is mounted. Can be reduced.

  Therefore, all of the type ID information shown in Step 405 of the flowchart shown in FIG. 7 is confirmed, and the processing in Steps 406 to 411 is not performed.

(Other embodiments)
Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various embodiments without departing from the gist of the present invention are also included in the present invention. include. A part of the above-described embodiments may be appropriately combined.

  Also, a software program for realizing the functions of the above-described embodiments is supplied from a recording medium directly to a system or apparatus having a computer that can execute the program using wired / wireless communication, and the program is stored in the imaging system. The present invention includes a case where the control method is executed.

  As a program supply method, a computer program that forms the present invention is stored in a server on a computer network, and a connected client computer downloads and programs the computer program.

Claims (12)

An imaging system including an imaging device including an imaging element and an optical device that includes an imaging optical system and is detachably attached to the imaging device, and performs data communication between the imaging device and the optical device. ,
The optical instrument is:
Correction data storage means for storing optical correction data of each lens included in the imaging optical system;
ID storage means for storing a type ID which is an identifier provided for each type of the optical device, and an individual ID which is an identifier provided for each of the optical devices;
Control means for controlling transfer of the optical correction data, the type ID, and the individual ID to the imaging device;
The imaging device
Lens data storage means for storing the optical correction data transferred from the optical apparatus in association with the type ID and the individual ID, and recording the storage as a communication history;
Optical correction means for correcting a captured image using the optical correction data;
When the communication history in which the type ID transferred from the optical device matches and the individual ID does not match is in the record of the lens data storage unit, the optical correction data associated with the matching type ID is selected, An imaging system comprising: control means for causing the optical correction means to perform optical correction.   The control unit of the imaging apparatus causes the optical correction to be performed by the optical correction data associated with the individual ID transferred from the optical device after performing the optical correction by the optical correction data associated with the matching type ID. The imaging system according to claim 1. An imaging system including an imaging device including an imaging element and an optical device that includes an imaging optical system and is detachably attached to the imaging device, and performs data communication between the imaging device and the optical device. ,
The optical instrument is:
Correction data for storing the optical correction data for each lens included in the imaging optical system separately for each type of optical correction data based on optical design values common to each type and individual optical correction data indicating a difference in optical characteristics different for each lens Storage means;
ID storage means for storing a type ID which is an identifier provided for each type of the optical device, and an individual ID which is an identifier provided for each of the optical devices;
Control means for controlling transfer of the type optical correction data, the individual optical correction data, the type ID, and the individual ID to the imaging device;
The imaging device
Lens data storage means for storing the type optical correction data and individual optical correction data transferred from the optical device in association with the type ID and the individual ID, and recording the storage as a communication history;
Optical correction means for correcting captured images using the type optical correction data and individual optical correction data;
When the communication history in which the type ID transferred from the optical device matches and the individual ID does not match is in the record of the lens data storage unit, the type optical correction data associated with the matching type ID is selected, An imaging system comprising: control means for causing the optical correction means to perform optical correction.   The control unit of the imaging apparatus performs optical correction by using the type optical correction data and the individual optical correction data associated with the type ID and the individual ID transferred from the optical device after performing optical correction by the type optical correction data. The imaging system according to claim 3, wherein: An imaging system including an imaging device including an imaging element and an optical device that includes an imaging optical system and is detachably attached to the imaging device, and performs data communication between the imaging device and the optical device. ,
The optical instrument is:
Correction data storage means for storing individual optical correction data indicating a difference in optical characteristics different for each lens as optical correction data for each lens included in the imaging optical system;
ID storage means for storing an individual ID which is an identifier provided for each of the optical devices;
Control means for controlling the transfer of the individual optical correction data and the individual ID to the imaging device;
The imaging device
Preliminarily storing type optical correction data based on optical design values common to various types of optical devices, storing the individual optical correction data transferred from the optical device in association with the individual ID, and communicating the storage Lens data storage means for recording as history;
Optical correction means for correcting captured images using the type optical correction data and individual optical correction data;
When the communication history in which the individual IDs transferred from the optical device do not match is in the record of the lens data storage unit, the type optical correction data stored in advance in the lens data storage unit is selected, and the optical correction unit An imaging system comprising: control means for performing optical correction. When an optical device including an imaging optical system is detachably mounted, the imaging device includes an image sensor that performs data communication with the optical device,
Lens data storage means for storing the optical correction data transferred from the optical device, the type ID, and the individual ID in association with each other, and recording the storage as a communication history;
Optical correction means for correcting a captured image using the optical correction data;
When the communication history in which the type ID transferred from the optical device matches and the individual ID does not match is in the record of the lens data storage unit, the optical correction data associated with the matching type ID is selected, An image pickup apparatus comprising: control means for causing the optical correction means to perform optical correction. An optical apparatus including an imaging optical system that performs data communication with the imaging device when detachably mounted on the imaging device according to claim 6,
Correction data storage means for storing optical correction data of each lens included in the imaging optical system;
ID storage means for storing a type ID which is an identifier provided for each type of the optical device, and an individual ID which is an identifier provided for each of the optical devices;
An optical apparatus comprising: control means for controlling transfer of the optical correction data, the type ID, and the individual ID to the imaging apparatus. When an optical device including an imaging optical system is detachably mounted, the imaging device includes an image sensor that performs data communication with the optical device,
The lens data storage means for storing the type optical correction data, the individual optical correction data, the type ID, and the individual ID transferred from the optical device in association with each other, and recording the storage as a communication history,
Optical correction means for correcting captured images using the type optical correction data and individual optical correction data;
When the communication history in which the type ID transferred from the optical device matches and the individual ID does not match is in the record of the lens data storage unit, the type optical correction data associated with the matching type ID is selected, An image pickup apparatus comprising: control means for causing the optical correction means to perform optical correction. An optical device including an imaging optical system that performs data communication with the imaging device when detachably mounted on the imaging device according to claim 8,
Correction data for storing the optical correction data for each lens included in the imaging optical system separately for each type of optical correction data based on optical design values common to each type and individual optical correction data indicating a difference in optical characteristics different for each lens Storage means;
ID storage means for storing a type ID which is an identifier provided for each type of the optical device, and an individual ID which is an identifier provided for each of the optical devices;
An optical apparatus comprising: the type optical correction data; the individual optical correction data; the type ID; and a control unit that controls transfer of the individual ID to the imaging apparatus. When an optical device including an imaging optical system is detachably mounted, the imaging device includes an image sensor that performs data communication with the optical device,
Pre-store type optical correction data based on optical design values common to each type of optical device, store the individual optical correction data transferred from the optical device and the individual ID in association with each other, and use the storage as a communication history Lens data storage means for recording;
Optical correction means for correcting captured images using the type optical correction data and individual optical correction data;
When the communication history in which the individual IDs transferred from the optical device do not match is in the record of the lens data storage unit, the type optical correction data stored in advance in the lens data storage unit is selected, and the optical correction unit An imaging apparatus comprising: control means for performing optical correction. An optical device including an imaging optical system that performs data communication with the imaging device when detachably mounted on the imaging device according to claim 10,
Correction data storage means for storing individual optical correction data indicating a difference in optical characteristics different for each lens as optical correction data for each lens included in the imaging optical system;
ID storage means for storing an individual ID which is an identifier provided for each of the optical devices;
An optical apparatus comprising: control means for controlling transfer of the individual optical correction data and the individual ID to the imaging device. An imaging system control method comprising: an imaging device including an imaging element; and an optical device including an imaging optical system and detachably attached to the imaging device, wherein data communication is performed between the imaging device and the optical device. Because
Optical correction data for each lens included in the imaging optical system, a type ID that is an identifier provided for each type of optical device, and an individual ID that is an identifier provided for each optical device are sent to the imaging device. A transfer step to transfer, and
A lens data storing step of storing the optical correction data transferred from the optical device in association with the type ID and the individual ID, and recording the storage as a communication history;
An optical correction step of correcting the captured image using the optical correction data;
When the type ID transferred from the optical device is coincident and the individual ID is not in the communication history record, the optical correction data associated with the coincident type ID is selected, and the optical correction is performed in the optical correction step. And a control step for performing correction. An imaging system control method comprising:

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