JP3544052B2 - Optical device and camera - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical device having a storage-type photoelectric conversion means for performing a focus adjustment and a photometric operation or a distance measuring and a photometric operation, which is used in a camera or the like, and to an improvement of a camera provided with the optical device.
[0002]
[Prior art]
Advances in automatic exposure and focus adjustment in cameras and the like have been remarkable in recent years. Exposure adjustment is appropriately controlled in most shooting situations, and the focus adjustment is also performed in the detection area at the center or multiple areas of the shooting screen. Although it is at a stage where it can be practically used.
[0003]
Needless to say, this largely depends on the development of microcomputers as brains for controlling and the progress of sensors for inputting information.
[0004]
The photometric sensor for exposure control divides the shooting screen into multiple parts to accurately detect the light distribution, and organically tie each detection result to judge optimal control in various situations, Selected.
[0005]
On the other hand, a focus detection sensor for focus adjustment can be detected not only at the center of the photographing screen but also at a plurality of points such as three points and five points, which is much easier to use than in the early days. It has become something.
[0006]
However, there is a demand for an ultimate form of a focus adjusting device that can focus on a plane (area) instead of a plurality of points on a shooting screen.
[0007]
In this case, it is easy to imagine that the importance of the exposure control corresponding to the focus detection point becomes higher than at present, and it is very effective to use a sensor for both focus detection and photometry as a method for realizing the exposure control.
[0008]
That is, various types of photometry can be performed centering on a point corresponding to the focus detection area, and optimal correspondence in any scene can be realized.
[0009]
[Problems to be solved by the invention]
However, since the focus detection sensor generally uses a storage-type photoelectric conversion element, the storage time cannot be ignored depending on the situation, and a prolonged storage operation for focus detection and photometry misses a photo opportunity. The situation that affects the shooting can be expected.
[0010]
(Object of the invention)
The present inventionofMy goal is,Precise focus detection operation or distance measurement operation and appropriate and quick split metering can be performed.An optical device and a camera are provided.
[0014]
[Means for Solving the Problems]
UpItemClaims 1 and 2 to achieve the goalOr 3The invention describedA signal of the first area from the photoelectric conversion means is supplied to the focus detection means or the detection means, and a signal of a divided area in which the second area around the first area is divided into a plurality of parts is supplied to the photometric means. The focus detection means or the detection means detects the defocus amount or the distance measurement information based on each of the subdivided pixel data in the first area, and the photometry means detects the defocus amount or the distance measurement information for each of the areas. Photometric information is detected based on the average value.
[0019]
Specifically, the focus detection and photometry use fundamentally different methods, focusing on the fact that during focus detection it is necessary to refine the focus detection in order to increase the accuracy, and in photometry it is necessary to avoid the effects of excessive computation and noise, When the output of the photoelectric conversion means is supplied to the focus detection means, the output area division is made finer, and when the output is supplied to the photometry means, the output area division is made coarse.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on illustrated embodiments.
[0023]
FIG. 1 is a diagram related to a first embodiment of the present invention, and is an optical arrangement diagram of each component for obtaining a photometric value for focus detection and exposure calculation in a shooting screen.
[0024]
In FIG. 1, 1 is a photographing lens, 8 is a field lens, 9 is a secondary imaging lens, and 10 is an area sensor.
[0025]
Light beams from different pupil positions of the photographing lens 1 are guided onto the two imaging screens 10a and 10b of the area sensor 10, respectively, and re-formed at an imaging magnification determined by the field lens 8 and the secondary imaging lens 9. Imaged. The area sensor 10 is located at a position optically equivalent to the photographic film surface with respect to the photographic lens 1, and the imaging screens 10a and 10b each have a visual field equal to the photographic screen.
[0026]
FIG. 2 shows a layout when the detection optical system shown in FIG. 1 is applied to a camera.
[0027]
In FIG. 2, 6 is a quick return mirror, 18 is a pentaprism, 19 is a split prism, 20 is a reflection mirror, and the others are the same as those in FIG.
[0028]
FIG. 3 is a view of the layout of FIG. 2 as viewed from above the camera.
[0029]
With the above configuration, a focus state (defocus information) and a photometric value for each region of the photographing screen can be obtained from the imaging screens 10a and 10b having a predetermined parallax. Since this method is disclosed in detail in Japanese Patent Application No. 5-278433, a detailed description is omitted here.
[0030]
FIG. 4 is a block diagram showing an example of a specific circuit configuration of a camera including the above-described components. First, the configuration of each unit will be described.
[0031]
In FIG. 4, a PRS is, for example, a one-chip microcomputer having a CPU (central processing unit), a ROM, a RAM, and an A / D conversion function therein. The microcomputer PRS is a camera sequence stored in the ROM. A series of camera operations such as an automatic exposure control function, an automatic focus adjustment function, and film winding and rewinding are performed according to a program. For this purpose, the microcomputer PRS communicates with the peripheral circuit in the camera body and the control device in the lens using the communication signals SO, SI, SCLK and the communication selection signals CLCM, CDDDR, CICC, and each circuit and lens. Control the operation of.
[0032]
SO is a data signal output from the microcomputer PRS, SI is a data signal input to the microcomputer PRS, and SCLK is a synchronous clock of the signals SO and SI.
[0033]
LCM is a lens communication buffer circuit that supplies power to the lens power supply terminal VL when the camera is operating, and that the selection signal CLCM from the microcomputer PRS is at a high potential level (hereinafter abbreviated as “H”, When the potential level is abbreviated as "L"), it serves as a communication buffer between the camera and the lens.
[0034]
When the microcomputer PRS sets the selection signal CLCM to "H" and sends out predetermined data from the SO in synchronization with SCLK, the buffer circuit LCM outputs the respective buffer signals of SCLK and SO via the camera-lens communication contact.LCK, DCL to the lens. At the same time, a buffer signal of the signal DLC from the lens is output to SI, and the microcomputer PRS inputs lens data from SI in synchronization with SCLK.
[0035]
DDR is a circuit for detecting and displaying various switches SWS, is selected when the signal CDDR is "H", and is controlled by the microcomputer PRS using SO, SI and SCLK. That is, based on the data sent from the microcomputer PRS, the display of the display member DSP of the camera is switched, and the on / off state of various operation members of the camera is notified to the microcomputer PRS by communication. OLC is an external liquid crystal display device located above the camera, and ILC is a finder internal liquid crystal display device.
[0036]
SW1 and SW2 are switches that are linked to a release button (not shown). The switch SW1 is turned on when the release button is pressed in the first stage, and the switch SW2 is turned on when it is pressed in the second stage. The microcomputer PRS performs photometry and automatic focus adjustment when the switch SW1 is turned on, and performs exposure control and subsequent film winding with the switch SW2 turned on as a trigger.
[0037]
The switch SW2 is connected to the "interrupt input terminal" of the microcomputer PRS. Even when the switch SW1 is turned on, an interrupt is generated by turning on the switch SW2 even during execution of the program, and the control can be immediately transferred to a predetermined interrupt program.
[0038]
MTR1 is a motor for feeding a film, and MTR2 is a motor for mirror up / down and charging a shutter spring. Forward and reverse rotations are controlled by respective drive circuits MDR1 and MDR2. The signals M1F, M1R, M2F and M2R input from the microcomputer PRS to the respective drive circuits MDR1 and MDR2 are motor control signals.
[0039]
MG1 and MG2 are shutter start curtain / rear curtain running start magnets, respectively, which are energized by signals SMG1 and SMG2 and amplification transistors TR1 and TR2, and the microcomputer PRS controls the shutter.
[0040]
Note that the film feeding and shutter control by the motor drive circuits MDR1 and MDR2 are not directly related to the present invention, and a detailed description thereof will be omitted.
[0041]
The signal DCL input to the microcomputer LPRS, which is an in-lens control device, in synchronization with LCK is command data from the camera to the lens LNS, and the operation of the lens in response to the command is predetermined. The microcomputer LPRS analyzes the instructions in accordance with a predetermined procedure, and performs operations of focus adjustment and aperture control, the operation status of each part of the lens (driving status of the focusing optical system, driving status of the aperture, etc.) and various parameters from the output DLC. (An open F number, a focal length, a defocus amount versus a coefficient of a movement amount of a focus adjustment optical system, various focus correction amounts, and the like) are output.
[0042]
This embodiment shows an example of a zoom lens. When a focus adjustment command is sent from a camera, the focus adjustment motor LTMR is controlled by signals LMF and LMR in accordance with the drive amount and direction sent at the same time. When driven, the optical system is moved in the optical axis direction to perform focus adjustment. The amount of movement of the optical system is monitored by a pulse signal SENCF of an encoder circuit ENC that detects a pattern of a pulse plate that rotates in conjunction with the optical system with a photocoupler and outputs a number of pulses corresponding to the amount of movement. At the counter in the computer LPRSCountingWhen the predetermined movement is completed, the microcomputer LPRS sets the signals LMF and LMR to "L" to brake the motor LMTR.
[0043]
For this reason, once the focus adjustment command is sent from the camera, the microcomputer PRS, which is the control device of the camera, does not need to be involved in driving the lens at all until the driving of the lens is completed. Further, when a request is made from the camera, the contents of the counter can be transmitted to the camera.
[0044]
When an aperture control command is sent from the camera, a well-known stepping motor DMTR for driving an aperture is driven in accordance with the number of aperture stages sent simultaneously. Since the stepping motor can perform open control, it does not require an encoder for monitoring the operation.
[0045]
ENCZ is an encoder circuit associated with the zoom optical system, and the microcomputer LPRS receives the signal SENCZ from the ENCZ and detects the zoom position. The microcomputer LPRS stores lens parameters at each zoom position, and when requested by the microcomputer PRS on the camera side, sends parameters corresponding to the current zoom position to the camera.
[0046]
The ICC is an area sensor (corresponding to the area sensor 10 in FIG. 1) for focus detection and photometry composed of a CCD or the like, and its driving circuit. The ICC is selected when the signal CICC is "H", and outputs signals SO, SI, It is controlled by the microcomputer PRS using SCLK.
[0047]
φV, φH, and φR are read signals of the area sensor output and reset signals, and a sensor control signal is generated by a drive circuit in the ICC based on the signal from the microcomputer PRS. The sensor output is amplified after reading from the sensor unit, and is input as an output signal IMAGE to an analog input terminal of the microcomputer PRS. The microcomputer PRS converts the signal into an analog signal and converts the digital value into a predetermined value on the RAM. Store sequentially to the address. Focus detection and photometric calculation are performed using these digitally converted signals.
[0048]
Although FIG. 4 shows that the camera and the lens are separate bodies (lens replacement is possible), the present invention does not have any problem even if the camera and the lens are integrated, and the present invention is not limited to these. Absent.
[0049]
Next, automatic focus adjustment and exposure calculation of the camera with the above configuration will be described according to the following flowchart.
[0050]
FIG. 5 is a rough flowchart of the overall sequence of the camera, which will be described below.
[0051]
When the power supply to the circuit shown in FIG. 4 is started, the microcomputer PRS starts executing from step (001) in FIG.
[0052]
In step (001), the state of the switch SW1, which is turned on when the release button is pressed in the first stage, is detected. If the switch SW1 is off, the process proceeds to step (002), and all flags and variables are initialized. Then, it is detected in step (001) that the switch SW1 is turned on again.
[0053]
On the other hand, if the switch SW1 is turned on in step (001), the process proceeds to step (003) to start the operation of the camera. Then, in this step (003), the "AF control" subroutine is executed. Here, accumulation and readout of image signals for focus detection, focus detection calculation, focus detection area selection, start of lens driving, and the like are performed.
[0054]
When the subroutine "AF control" is completed, the process proceeds to step (004), where an "AE control" subroutine for storing and reading an image signal for photometry, detecting the state of various switches, and displaying is executed. .
[0055]
When the subroutine "AE control" ends, the process returns to step (001) again, and repeats steps (003) and (004) until the switch SW1 is turned off.
[0056]
FIG. 6 is a flowchart of the "AF control" subroutine executed in step (003) of FIG.
[0057]
When this subroutine is called, first, in step (031), a "sensor drive" subroutine is executed. Here, accumulation and readout (A / D conversion) of an image signal are performed after resetting the sensor for the focus detection operation. In the following step (032), a "focus detection" subroutine for performing an actual focus detection calculation is performed. Then, in the next step (033), an "area selection" subroutine for determining a target area for focus adjustment is performed. Basically, automatic selection is performed by giving priority to near points in the area sensor.
[0058]
Then, in the next step (034), the "lens drive" subroutine is executed, that is, the lens is driven based on the defocus amount of the area determined in the above step (032). The “AF control” subroutine ends.
[0059]
FIG. 7 is a flowchart of the "sensor drive" subroutine executed in step (031) of FIG.
[0060]
When this subroutine is called, first, in step (311), the sensor is reset. Specifically, the reset operation is performed inside the ICC by simultaneously setting the control signals φV, φH, and φR to “H” for a certain period of time by the microcomputer PRS.
[0061]
In the following step (312), an accumulation start command is sent from the microcomputer PRS to start accumulation, and in the next step (313), the process waits until the accumulation is completed. When the accumulation is completed, in the next step (314), the control signals φV and φH are driven to sequentially read out the sensor outputs, A / D-converted by the microcomputer PRS, and stored in the RAM. At 315), the "sensor drive" subroutine is terminated.
[0062]
FIG. 8 is a flowchart of the “focus detection” subroutine executed in step (032) of FIG.
[0063]
When this subroutine is called, first, in step (321), it is determined whether or not the lens is currently stopped. If the lens is not stopped, it is not necessary to prepare for the photometric operation. The processing shifts to execute a "focus detection calculation" subroutine for performing a focus detection calculation using the image signal obtained in step (031) of FIG. Here, the operation is to obtain the defocus amount DEF while driving the lens.
[0064]
When the defocus amount DFF is obtained, the process directly proceeds from step (323) to the "lens drive" subroutine of step (034) in FIG.
[0065]
On the other hand, in step (321), if the lens is stopped, in other words, if the lens has been driven to the target position (focusing position), the process proceeds to step (324), where the next Start the accumulation operation. If this is a time of focusing, it is a preparation operation for the photometry operation. That is, as described later, when it is determined that the focus is achieved in the next step (326), the flow of the storage end detection in the "AE control" subroutine via step (327) [step (043) in FIG. 10]. This is to move to immediately.
[0066]
In the next step (325), a "focus detection calculation" subroutine for performing a focus detection calculation using the image signal obtained in step (031) in FIG. 6 is executed in the same manner as in step (322). In this focus detection calculation, even if the lens is currently stopped, the lens does not always reach the in-focus position, for example, when the previous lens drive amount was large. This focus detection result is used as an explanation of the next step (326) and subsequent steps, as described in the subsequent steps (326) and thereafter, the operation is shifted to the photometric operation also using the area sensor used at the time of focus detection, or the operation of performing the focusing operation again. Is used to determine whether to shift to.
[0067]
In the next step (326), it is determined whether or not the result of the focus detection calculation is in-focus. If the result is in-focus, the "AE control" of step (004) in FIG. The process proceeds to a subroutine (specifically, the process proceeds to step (043) in FIG. 10 described later).
[0068]
If the focus is out of focus in the step (326), the "focus detection" subroutine is terminated through the step (328), and in this case, the next lens drive [step (034) in FIG. In step [325], the lens is driven based on the focus detection result obtained in step (325). Note that, even after such a flow, the accumulation operation (for the photometric operation) has been started since the step (324) has been passed, but the following “AF control” subroutine [FIG. This accumulation operation is reset at step (311)], so that there is no problem.
[0069]
FIG. 9 is a flowchart of the "lens drive" subroutine executed in step (034) of FIG.
[0070]
When this subroutine is called, first, in step (341), communication with the lens is performed, and two data "S" and "PTH" are input.
[0071]
The lens coefficient “S” is “the coefficient of the moving amount of the focusing optical system versus the moving amount of the image plane” of the taking lens. That is, it represents the amount of image plane movement of the taking lens when the focus adjusting optical system of the taking lens is moved by a unit length in the optical axis direction. For example, in the case of a single lens of the whole extension type, since the entire photographing lens corresponds to the focus adjusting optical system, the movement of the focus adjusting optical system is equivalent to the image plane movement of the photographing lens, so "S = 1" In the case of a zoom lens, “S” changes depending on the position of the zoom optical system.
[0072]
On the other hand, “PTH” is a movement amount of the focus adjusting optical system LNS per one output pulse of the encoder ENCF interlocked with the movement of the optical system in the optical axis direction. In the following step (342), the detected defocus amount DEF in the selected focus detection area, the value obtained by converting the moving amount of the imaging optical system to be focused by S and PTH into the number of output pulses of the encoder, that is, a so-called lens The driving amount FP is obtained by the following equation.
[0073]
FP = DEF ・ S / PTH
In the following step (343), the FP obtained in the above step (342) is sent to the lens to instruct the drive of the focusing optical system, and in the next step (344), this "lens drive" subroutine ends. I do.
[0074]
FIG. 10 is a flowchart of the "AE control" subroutine executed in step (004) of FIG.
[0075]
When this subroutine is called, first, in step (041), it is determined whether the lens is stopped. If stopped, the process proceeds to the next step (042) to start accumulation for photometric operation, and in the subsequent step (043), waits for the end of accumulation.
[0076]
If it is determined in step (326) of FIG. 8 that the in-focus state has been reached, the accumulation has been started in step (324) of FIG. 8 as well, and the accumulation end is detected in this step (043). The process directly shifts from the "focus detection" subroutine.
[0077]
When the accumulation is completed, the sensor output is read in step (044). Then, in the next step (045), a “photometric calculation” subroutine for obtaining an exposure control value from the photometric result is performed. As the calculated value, an accumulated charge amount, an accumulation time, a read gain, and the like are used.
[0078]
In the following step (046), the state of various switches is detected. In the next step (047), focus detection, photometry and display according to the state of each switch are performed. In the following step (048), the "AE control" is performed. The subroutine ends.
[0079]
Note that when the lens is not stopped in step (041) (for example, when the lens is determined to be out of focus in step (326) in FIG. 8 and the lens is driven to the in-focus position in the next lens drive). Directly proceeds to step (048).
[0080]
Next, the “photometric calculation” subroutine executed in step (045) will be described.
[0081]
When photometry is performed by a storage-type photoelectric conversion element, the elements used for the calculation are the storage time, the read gain, and the sensor output value. Further, each value at the reference luminance is also required for conversion to the absolute luminance value.
[0082]
Reference luminance Ev value (E₀  ), The accumulation time, readout gain, and sensor output₀  , G₀  , V₀  And T, G, and V in E, the following relational expression holds.
[0083]
E = E₀  + Log (T₀  / T × G₀  / G × V / V₀  ) / Log2
Here, as a measure against so-called flicker, if T is 10 ms or more, there is almost no problem, and practically sufficient photometry can be performed.
[0084]
The setting read gain is 20, 40, 80, and 160 times, and the sensor output value is 0 to 255 in 8-bit A / D conversion.
[0085]
In step (045) of FIG. 10, the above equation is executed to determine the subject luminance Ev value E.
[0086]
Next, switching of the area division of the sensor output will be described.
[0087]
FIG. 11 is a diagram illustrating a pixel configuration of one of the two imaging screens of the area sensor 10.
[0088]
When used for focus detection, pixel area division and output area division are the same. In other words, the output of one pixel is treated as one unit of output, the focus adjustment operation is performed using a high-definition image signal, and the focus is adjusted accurately.
[0089]
On the other hand, when used for photometry, for example, as shown in FIG. 12, outputs are grouped (averaged) every several pixels (10 pixels in the figure) and handled as one unit output. This is because it is not necessary to directly handle the subdivided data as in the focus detection for the photometry, but rather it is affected by noise or the amount of calculation increases.
[0090]
When the area shown in FIG. 13 is selected by the area selection in the focus detection operation, as shown in FIG. 14, the center area (0) and its surroundings divided by six are also effective. . In this case, the average value of the pixel outputs in each area is used as the photometric output value, and the divided area is not limited to this shape and can be set freely.
[0091]
(Second embodiment)
In the first embodiment described above, the sensor output re-stored is used for the photometric calculation. However, in order to more actively reduce the time, it is also possible to use the output of the focused sensor for the photometric calculation.
[0092]
Hereinafter, changed portions of the first embodiment will be described.
[0093]
FIG. 15 is a flowchart of the “focus detection” subroutine corresponding to FIG. 8 of the first embodiment.
[0094]
The only change is that there is no accumulation start operation performed in step (324) of FIG. That is, in FIG. 15, the "focus detection calculation" subroutine is immediately performed in step (524), and the in-focus determination is performed in the next step (525). If the in-focus state is reached, the process immediately proceeds to the "AE control" subroutine in the same manner as in FIG.
[0095]
FIG. 16 is a flowchart of the “AE control” subroutine corresponding to FIG. 10 of the first embodiment.
[0096]
The change here is that the transition from step (526) in FIG. 15 to the “AE control” subroutine is immediately before the “photometry calculation” subroutine in step (063), and the step in FIG. The point that the operation from (042) to (044) from the start of the series of accumulation to reading of the sensor signal is the execution of the “sensor drive” subroutine in step (062).
[0097]
That is, when it is determined in FIG. 15 that focusing is performed, photometry is also performed using the sensor signal used for focus determination as it is, so that it is possible to immediately proceed to photometric calculation, and to perform steps (042) to (044) in FIG. The corresponding series of operations can be performed by executing the "sensor drive" subroutine as it is, and the flowchart is also very simple.
[0098]
According to the above embodiments, in order to minimize the photometric operation time when the lens is stopped immediately before the photographing (exposure) operation, it is determined whether or not the current lens position can be regarded as the in-focus position. If the accumulation operation for photometry is started before the start of the focus detection calculation to be performed (first embodiment), or if the result of the focus detection calculation after stopping the lens is in focus, Since the sensor output obtained at the time of focus detection is used as it is in the photometric information calculation (second embodiment), the delay of the photographing preparation operation due to the enhancement of the focus detection and photometric functions can be avoided, so that it is comfortable. Operability is maintained.
[0099]
On the other hand, the area division of the sensor output is used in the most subdivided manner at the time of focus detection, and is collectively used every several pixels at the time of photometry. As a result, a precise distance measurement operation and appropriate and rapid split photometry can be performed. In other words, the sensor output can be effectively used, and the detection area in the area can be fully utilized.
[0100]
(Modification)
Although the present invention has been described with reference to an example in which the present invention is applied to a TTL single-lens reflex camera, the present invention can also be applied to a camera that performs external distance measurement. Furthermore, the present invention is applicable to other devices.
[0101]
In each of the above embodiments, the use area of the sensor output used at the time of focus detection and the use area used at the time of photometry partially overlap, but the effective use area of the sensor output may be different in each. Good.
[0102]
【The invention's effect】
As described above, according to the present invention,A signal of the first area from the photoelectric conversion means is supplied to the focus detection means or the detection means, and a signal of a divided area in which the second area around the first area is divided into a plurality of parts is supplied to the photometric means. The focus detection means or the detection means detects the defocus amount or the distance measurement information based on each of the subdivided pixel data in the first area, and the photometry means detects the defocus amount or the distance measurement information for each of the areas. Photometric information is detected based on the average value.
[0106]
Therefore, focus detection operationOr ranging operationAnd appropriate and quick split photometry can be performed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a detection optical system according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a configuration when the detection optical system of FIG. 1 is applied to a camera.
FIG. 3 is a plan view showing the optical system of FIG. 2 as viewed from above the camera.
FIG. 4 is a block diagram illustrating a configuration of each unit of the camera in FIG. 2;
FIG. 5 is a flowchart showing a rough operation of the camera having the configuration shown in FIG. 4;
FIG. 6 is a flowchart showing an operation executed in step (004) of FIG. 5;
FIG. 7 is a flowchart showing an operation executed in step (031) of FIG.
FIG. 8 is a flowchart showing an operation executed in step (032) of FIG. 6;
FIG. 9 is a flowchart showing an operation executed in step (034) of FIG. 6;
FIG. 10 is a flowchart showing an operation performed in step (004) of FIG. 5;
11 is a diagram illustrating one pixel configuration of two imaging screens of the area sensor in FIG. 1;
12 is a diagram illustrating a photometric divided area when a focus detection area in FIG. 11 is selected.
FIG. 13 is a diagram illustrating an example of an area selected during a focus detection operation in the first embodiment of the present invention.
14 is a diagram illustrating a photometric divided area when a focus detection area in FIG. 13 is selected.
FIG. 15 is a flowchart showing an operation at the time of focus detection according to the second embodiment of the present invention.
FIG. 16 is a flowchart illustrating an operation during AE control according to the second embodiment of the present invention.
[Explanation of symbols]
Microcomputer provided in PRS camera
ICC focus detection and photometry sensor and drive circuit
LCM lens communication buffer circuit
LNS lens
Microcomputer provided in LPRS lens

Claims (3)

Photoelectric conversion means for receiving a light beam from the object passing through the lens and outputting a signal; a focus detection means for detecting a defocus amount of the lens from an output of a signal of the photoelectric conversion means; An optical apparatus comprising: a lens driving unit that drives a focus adjustment optical system of the lens based on the light; and a photometric unit that detects photometric information from a signal output of the photoelectric conversion unit.
A signal of a first region from the photoelectric conversion unit is supplied to the focus detection unit, and a signal of a divided region in which a second region around the first region is divided into a plurality of portions for the photometric unit. The focus detection means detects the defocus amount based on each of the subdivided pixel data in the first area, and the photometric means based on an average value for each of the divided areas. An optical device for detecting the photometric information . Photoelectric conversion means for receiving a light beam having parallax from an object and outputting a signal, detecting means for electrically calculating the parallax and detecting distance measurement information for performing focus adjustment of a lens, and the detecting means An optical apparatus comprising: a lens driving unit that drives the lens based on the distance measurement information obtained in the step; and a photometry unit that detects photometry information from an output of the photoelectric conversion unit.
A signal of the first region from the photoelectric conversion unit is supplied to the detection unit, and a signal of a divided region obtained by dividing the second region around the first region into a plurality of regions is also supplied to the photometric unit. The detecting means detects the distance measurement information based on each of the subdivided pixel data in the first area, and the light measurement means detects the distance measurement information based on an average value for each of the divided areas. An optical device characterized by detecting A camera comprising the optical device according to claim 1.

Images