JP2006352757A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus which accomplishes a wide dynamic range with simple configuration. <P>SOLUTION: A circuit board 2 includes: a transmission portion wherein an optical image converged by a lens 1 is transmitted; and a reflecting portion wherein an optical image converged by the lens 1 is reflected. An imaging element A3 performs optic/electric conversion upon an optical image transmitted through the transmission portion and outputs a first image signal. An imaging element B4 performs optic/electric conversion upon an optical image reflected on the reflecting portion and outputs a second image signal. Exposure of light to be made incident on each of the imaging elements is made different in accordance with a structure of the circuit board 2. Thus, image signal outputs of different sensitivities between the two imaging elements are obtained. A video signal composing section 50 composes the first image signal and the second image signal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an imaging apparatus capable of expanding a dynamic range.

  There are various types of image sensors that can be used as photoelectric conversion devices, which are the main features of electronic image capture devices. In any image sensor, sensitivity and saturation charge are important performance indicators for estimating its performance. There is. For example, in the case of a solid-state imaging device, the sensitivity indicates how much charge can be generated when the pixel is irradiated with light at a predetermined exposure amount, and the saturation charge amount is the maximum amount that the pixel can generate. Indicates the amount of charge.

  On the other hand, for example, in video imaging devices, the level of the output signal is standardized, and the sensitivity is represented by the value of the incident exposure that outputs the standardized predetermined signal level, and how many times the standardized signal level. It can be reproduced as a dynamic range. Although the dynamic range may be limited by the circuit system of the imaging apparatus, the maximum limit is the saturation charge amount of the imaging element. That is, when sensitivity is defined as the specification of the imaging device, the dynamic range is limited by the limit value of the saturation charge amount of the imaging device circuit or the imaging device. If it can be expressed up to 4 times the standard level, and this is called a dynamic range of 400%, the larger the% value, the more the darker to brighter the signal gradation can be reproduced. It can be said that it is an imaging device.

  The dynamic range is an important performance index for the imaging apparatus, and an imaging apparatus that expands the dynamic range is disclosed. For example, Patent Document 1 describes a technique for expanding the dynamic range by combining the same pixel data on the same image sensor that has been shot a plurality of times by changing the exposure amount. In Patent Document 2, the light collected by the imaging optical system is divided into two or more optical paths with different light amounts, and the video signals from the respective image sensors obtained by two or more image sensors are synthesized. A method for expanding the dynamic range is disclosed.

  By the way, recently, the number of pixels of the image sensor in the electronic image pickup apparatus has been dramatically increased, and high definition of the image has been advanced. In such a high-definition imaging device, focusing becomes more severe. In general, an electronic viewfinder is used to check the photographing state of the electronic imaging apparatus. However, it is difficult to mount a large screen because of a practical size limit. For this reason, a display device with a smaller number of pixels than the image sensor is used, and the entire image area is displayed by performing processing such as thinning out all the captured pixels at a predetermined ratio according to the limited number of pixels on the electronic viewfinder. is doing. As a result, there is a problem in that it is impossible to confirm whether or not the image is in focus on the electronic viewfinder, so that the image is out of focus and cannot be displayed with high-definition resolution. For this reason, an optical viewfinder that can confirm an actually captured image as an optical image is particularly useful for professional photographers.

As described in Japanese Patent Application Laid-Open No. 2004-228688, an imaging apparatus that disposes a rotating body on the front surface of an imaging element is disclosed as an imaging apparatus that enables visual observation using an optical viewfinder. In this method, incident light from the imaging optical system is reflected by a rotating plate and guided to an optical viewfinder, and a system that transmits incident light and guides it to an image sensor in time series. As described above, there is an imaging apparatus that exhibits a specific effect by disposing the rotating body on the front surface of the imaging element.
Japanese Patent Laid-Open No. 2-100564 JP-A-11-98418 US Patent Application Publication No. 2003/0169361

  However, in the technique described in Patent Document 1, the rotating plate is specialized to obtain frame images with different amounts of light in time series, and another optical path separation structure is required to apply the optical viewfinder. And the configuration becomes complicated.

  In the technique described in Patent Document 2, since an optical path splitting method that always guides light rays to a plurality of image sensors is used, the amount of light reaching each image sensor is divided, and the sensitivity of the image pickup apparatus deteriorates. In addition, in order to apply the optical viewfinder, a light separation structure is further required, and the configuration becomes complicated.

  In the technique described in Patent Document 3, a single image sensor captures a single amount of light, and thus a wide dynamic range image cannot be obtained.

  The present invention has been made in view of the above-described problems, and a first object thereof is to provide an imaging apparatus that realizes a wide dynamic range with a simple configuration. It is a second object of the present invention to provide an imaging apparatus capable of expanding a dynamic range with a simple configuration and using an optical viewfinder.

  The present invention has been made to solve the above problems, and the invention according to claim 1 is an optical system for condensing light from a subject and an optical image collected by the optical system. A rotating plate having a transmitting portion to be reflected, a reflecting portion that reflects the optical image collected by the optical system, and a first optical signal that photoelectrically converts the optical image that has passed through the transmitting portion and outputs a first image signal. The first image signal, the second image signal that outputs the second image signal, and the first image signal and the second image signal are synthesized. An image pickup apparatus comprising a video signal synthesis unit.

  According to a second aspect of the present invention, there is provided an optical system that condenses light from a subject, a transmission unit that transmits an optical image collected by the optical system, and an inclination of a first angle with respect to a reference axis. A first reflecting portion that reflects the optical image collected by the optical system; and an optical image that is inclined by a second angle with respect to the reference axis and that is collected by the optical system. A rotating plate having a second reflecting part to be reflected, a first imaging element for photoelectrically converting an optical image transmitted through the transmitting part and outputting a first image signal, and the first reflecting part. A second image sensor that photoelectrically converts the reflected optical image and outputs a second image signal; an optical finder that displays the optical image reflected by the second reflecting unit; and the first image signal. And a video signal synthesizer for synthesizing the second image signal. An imaging device for.

  According to a third aspect of the present invention, in the imaging device according to the first aspect, the transmittance of the transmissive part and the reflection of the reflective part are different so that the amount of light transmitted through the transmissive part is different from the amount of light reflected by the reflective part. The reflectance of the part is set.

  According to a fourth aspect of the present invention, in the imaging apparatus according to the first aspect, the areas of the transmission part and the reflection part irradiated with the light condensed by the optical system are different.

  According to a fifth aspect of the present invention, in the imaging device according to the second aspect, the normal axes of the reflection surfaces of the first reflection unit and the second reflection unit are both light condensed by the optical system. It is characterized by being inclined with respect to the optical axis.

  According to a sixth aspect of the present invention, in the imaging device according to the second aspect, the transmittance of the transmissive portion is different from the amount of light that is transmitted through the transmissive portion and the amount of light that is reflected by the first reflective portion. And the reflectance of the first reflecting portion is set.

  The invention according to claim 7 is the imaging apparatus according to claim 1, wherein the areas of the transmission part and the first reflection part irradiated with the light condensed by the optical system are different. To do.

  According to an eighth aspect of the present invention, in the imaging apparatus according to the first or second aspect, the electronic shutter speeds of the first imaging element and the second imaging element are different.

  According to a ninth aspect of the present invention, in the imaging apparatus according to the first or second aspect, the rotating plate includes a plurality of transmission parts having different transmittances.

  According to the present invention, by rotating the rotating plate and switching the optical path between the transmission part and the reflection part, the total light quantity of the light constituting the optical image is incident on the respective image sensors. Can be enlarged. In addition, according to the present invention, the first reflecting portion and the second reflecting portion having different inclinations with respect to the reference axis are provided, and the light reflected by the first reflecting portion enters the second image sensor. Since the light reflected by the second reflecting portion is incident on the optical viewfinder, the dynamic range can be expanded with a simple configuration and the subject can be viewed with the optical viewfinder.

  The best mode for carrying out the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. FIG. 1 shows the configuration of the imaging apparatus according to the present embodiment. The lens 1 (optical system) collects light incident from the subject. Incident light collected by the lens 1 is applied to the rotating plate 2. The rotating plate 2 is configured to be rotatable about a rotation axis C extending in a direction perpendicular to the main surface through the center of the main surface, and a transmission unit that transmits the irradiated light, and the irradiated light. And a reflecting portion that reflects. In the present embodiment, depending on the structure of the rotating plate 2, the exposure amount of light incident on each image sensor is differentiated. As a result, image signal outputs having different sensitivities between the two image sensors can be obtained.

  The light irradiated to the rotating plate 2 is distributed in time series into light that is transmitted toward the image sensor A3 and light that is reflected toward the image sensor B4 as the rotating plate 2 rotates. The image sensor A3 and the image sensor B4 photoelectrically convert an optical image incident on the imaging surface, and output an image signal based on each optical image to the signal processing unit 5. The signal processing unit 5 includes a video signal synthesizing unit 50. After the image signals output from the image sensor A3 and the image sensor B4 are synthesized and converted into one frame signal, a predetermined process (not shown) is performed to obtain a video signal. Output from the imaging device.

  Further, the imaging apparatus is equipped with a timing generator 6 that generates pulses for controlling the timing of various operations, and the pulses generated by the timing generator 6 are output to the imaging control unit 7 and the rotary plate control unit 8. Is done. The imaging control unit 7 generates drive control signals for the image sensor A3 and the image sensor B4 in synchronization with the input pulse, and controls reading and accumulation of the two image sensors at a predetermined timing. The rotating plate control unit 8 generates a driving signal for the rotating plate 2 in synchronization with the input pulse, and controls the rotating speed so as to match the timing of reading and accumulation of the two image sensors. The operation of the unit 9 is controlled. The rotary plate drive unit 9 rotates the rotary plate 2 under the control of the rotary plate control unit 8.

  FIG. 2 shows the configuration of the video signal synthesis unit 50. The output signal from the image sensor A3 is written in the memory 51a or 51b with the timing controlled by a memory controller (not shown), and the output signal from the image sensor B4 is also controlled in the memory 51c or 51d by the memory controller (not shown). Is written to. The outputs of the memories 51a and 51b are switched and controlled so that the timings of the outputs do not match, and are input to the wide D range processing unit 52. The same applies to the memories 51c and 51d. The wide D range processing unit 52 adds output signals of different exposure amounts from the respective image sensors by a predetermined calculation, and performs gradation processing. Since writing and reading (writing and reading) cannot be performed simultaneously on a single memory, two memories are prepared for signals from the same image sensor, and signals are written and read alternately. Is called.

  FIG. 3 shows the configuration of the rotating plate 2. As shown in FIG. 3A, the rotating plate 2 is provided with a transmissive region 20 (transmissive portion) and a reflective region 21 (reflective portion) that occupy 180 degrees out of 360 degrees on the entire circumference. The transmissive region 20 transmits the incident light from the lens 1 as it is and makes it incident on the image sensor A3. The reflective region 21 reflects the incident light from the lens 1 at a reflection angle θ degree as shown in FIG. This is incident on the image sensor B4.

  In the present embodiment, in order to make a difference in the exposure amount of light incident on each image sensor, almost all light is transmitted through the transmissive region 20, and the light reflectance of the reflective region 21 is 10%. . In order to make a difference in the exposure amount, the following means may be used in addition to setting the transmittance value of the transmissive region 20 and the reflectance value of the reflective region 21 to be different values as in the present embodiment. For example, the charge accumulation time of each image sensor, that is, the electronic shutter speed may be controlled so that the charge accumulation times (electronic shutter speed) of the image sensor A3 and the image sensor B4 are different.

  Further, the areas of the transmission region 20 and the reflection region 21 that constitute the irradiation region of the rotating plate 2 irradiated with the light condensed by the lens 1 may be different. In order to do this, for example, the central angle θ1 of the transmissive region 20 configured in a fan shape may be different from the central angle θ2 of the reflective region 21, and the rotation speed of the rotating plate 2 may be constant. Further, a means of changing the rotational speed of the rotating plate 2 between a period in which the transmissive region 20 crosses the image sensor A3 and a period in which the reflective region 21 reflects incident light to the image sensor B4 is also conceivable.

  The shape of the rotating plate 2 is not limited to a circle, and may be an ellipse or a polygon. Further, the rotation axis C may not exist at the center of the rotation plate 2. Furthermore, the shape of the transmission region 20 and the reflection region 21 may not be a fan shape. Further, in the present embodiment, an example of an imaging apparatus having two imaging elements is taken as an example, but the number of imaging elements is arbitrary in principle.

  FIG. 4 shows an imaging processing sequence of the imaging apparatus according to the present embodiment. While the incident light from the lens 1 is reflected by the rotating plate 2 and applied to the image sensor B4, the image sensor B4 accumulates charges. During this time, light from the subject does not enter the image sensor A3. While the incident light from the lens 1 is transmitted through the rotating plate 2 and applied to the image sensor A3, the image sensor A3 accumulates charges. During this time, light from the subject does not enter the image sensor B4.

  In the present embodiment, all periods other than the charge accumulation period are assigned to the charge read period. The video signal output SAn (n = 1, 2,...) Read from the image sensor A3 is recorded in the memory 51a and the memory 51b alternately as a signal MAn (n = 1, 2,. Write). The video signal output SBn (n = 1, 2,...) From the image sensor B4 is recorded (written) to the memory 51c and the memory 51d alternately as a signal MBn (n = 1, 2,...). ) The recorded signals MAn and MBn are read from the memory 51a or 51b and the memory 51c or 51d at the same timing, respectively, and synthesized by the wide D range processing unit 52 as a wide D range (wide dynamic range) processed image Dn. Output to the subsequent stage. As described above, a wide dynamic range image can be obtained by combining frame signals having different exposure amounts.

  As described above, in the present embodiment, the light from the lens 1 passes through the transmission region 20 of the rotating plate 2 and forms an image on the image sensor A3, and is reflected by the reflecting region 21 of the rotating plate 2 and images. An image is formed on the element B4. Since the exposure amount of light incident on the image sensor A3 and the exposure amount of light incident on the image sensor B4 are different, image signals having different sensitivities are output from the two image sensors based on the same subject image. These two image signals are synthesized by the video signal synthesis unit 50.

  As in the prior art, when an optical image is branched and formed on two image sensors by an optical element such as a prism that always branches the optical path, the light amount is halved, resulting in a sensitivity loss of the image sensor. On the other hand, according to the present embodiment, by rotating the rotating plate 2 and switching the optical path between the transmission part and the reflection part, the total amount of light constituting the optical image is incident on each image sensor. The dynamic range can be expanded with a simple configuration without degrading the sensitivity of the image sensor.

  Next, a second embodiment of the present invention will be described. FIG. 5 shows the configuration of the imaging apparatus according to the present embodiment. In the present embodiment, a system for guiding the reflected light from the rotating plate 2 to the optical viewfinder 10 is added. In FIG. 5, the same components as those in FIG.

  FIG. 6 shows the configuration of the rotating plate 2. FIG. 6A shows the entire plate surface. The irradiation surface of the rotating plate 2 includes a transmission region 20, a reflection angle A region 22a (second reflection portion), and a reflection angle B region 22b (first reflection portion). FIG. 6B shows a state of the reflecting surface on the rotating plate 2 in a state where the light from the lens 1 is irradiated to the reflection angle A region 22a. FIG. 6C shows a state of the reflecting surface on the rotating plate 2 in a state where the light from the lens 1 is irradiated to the reflection angle B region 22b. The reflection angle A region 22a has a first angle inclination with respect to the optical axis (or rotation axis C) of the incident light, and the light reflected at the reflection angle A by the reflection angle A region 22a is the optical viewfinder. 10 is incident. Further, the reflection angle B region 22b has a second inclination with respect to the optical axis (or rotation axis C) of the incident light, and the light reflected at the reflection angle B by the reflection angle B region 22b is imaged. Incident on element B4.

  In the present embodiment, it is assumed that the light reflectances of the reflection angle A region 22a and the reflection angle B region 22b are both 10%. By providing the reflection angle A region 22a and the reflection angle B region 22b having reflection surfaces with different inclinations relative to the reference axis (the optical axis of the incident light or the rotation axis C), the light from the lens 1 reflects the reflection angle A. While the region 22a is being irradiated, incident light is guided to the optical viewfinder 10 so that an optical image can be viewed.

  FIG. 7 shows an imaging processing sequence of the imaging apparatus according to the present embodiment. Recording and reading of image signals to and from each memory are the same as in the first embodiment. However, in the present embodiment, a visual timing at the optical viewfinder 10 when the light from the lens 1 enters the reflection angle A region 22a is added.

  As described above, according to the present embodiment, the reflection angle A region 22a and the reflection angle B region 22b having reflection surfaces with different inclinations with respect to the reference axis are provided, and the light reflected by the reflection angle A region 22a is reflected. Since the light incident on the optical viewfinder 10 and reflected by the reflection angle B region 22b is incident on the image sensor B4, wide dynamic range imaging can be performed using two image sensors, and at the same time, the optical viewfinder. The captured image can be visualized. Note that the number of image pickup devices is not limited to two. If a plurality of reflection regions having different inclinations with respect to the optical axis of incident light and a plurality of image pickup devices corresponding to these are arranged, three or more image pickup devices are provided. Even devices can be used.

  Further, the normal axes extending in the normal direction of the respective reflecting surfaces of the reflection angle A region 22a and the reflection angle B region 22b have an oblique angle with respect to the optical axis of the incident light from the lens 1. Accordingly, since the incident light is reflected to the lens 1 side with the main surface of the rotating plate 2 as a reference position, the image sensor B4 and the optical viewfinder 10 can be arranged on the lens 1 side, and the optical viewfinder 10 side The optical path can be branched into the image sensor A3, the image sensor B4, and the optical viewfinder 10 without complicating the optical structure.

  Next, a third embodiment of the present invention will be described. Since the overall configuration of the imaging apparatus according to this embodiment is the same as that of the second embodiment, description thereof is omitted. As shown in FIG. 8, the rotating plate 2 of the imaging device according to the present embodiment includes a transmissive region A 23 a and a transmissive region B 23 b having different transmittances, and a reflective region having reflective surfaces having different inclinations with respect to the reference axis. A24a and a reflection region B24b. The reflection area A24a guides the incident light from the lens 1 to the optical viewfinder 10, and the reflection area B24b guides the incident light from the lens 1 to the image sensor B4. The reflectance of these two reflection areas is 10%. On the other hand, the transmission region A23a has a transmittance of 100%, and the transmission region B23b has a transmittance of 50%.

  As a result, optical images with different exposure amounts in time series can be captured on the image sensor A3 side. As a result, optical images of three types of exposure amounts can be captured by two types of image sensors. Thus, by providing a plurality of regions having different transmittances, output signals with different exposure amounts can be obtained in time series with one image sensor, and as a result, a larger number of output signals than the number of image sensors can be obtained. Thus, the wide D range processing unit 52 can perform more accurate calculation.

  In order to obtain output signals with different exposure amounts by the image sensor A3, the transmittance of the transmission region A23a and the transmission region B23b may be the same, and the areas of both may be different. Further, by providing a light shielding region in a part of the transmission region A23a or the transmission region B23b and adjusting the area of the light shielding region, the amount of light transmitted through the transmission region A23a and the amount of light transmitted through the transmission region B23b. May be different.

  In this embodiment, as compared with the second embodiment, more frame signals are used for wide dynamic range processing. Therefore, when each is stored in the memory, the memory is increased by the increased number of frame signals. . FIG. 9 shows a configuration of the video signal synthesis unit 50 according to the present embodiment. The video signal synthesis unit 50 receives the output from the image sensor A3 in order to temporarily store the frame signals for two frames captured by the image sensor A3 with different exposure amounts in time series in the memory and read them at the same timing. For this reason, memories 51a to 51d for a total of four frames are provided. In addition, in order to temporarily store one frame signal from the image sensor B4 in a memory and read it at the same timing, memories 51e to 51f for a total of two frames are provided. The frame signals read from these memories are synthesized by the wide D range processing unit 52 in the same manner as in the first embodiment.

  FIG. 10 shows an imaging processing sequence of the imaging apparatus according to the present embodiment. FIG. 10 shows the timing of reading signals from each image sensor, the timing of writing and reading frame signals to each memory, and the timing of generating a wide dynamic range processed image. Charges are accumulated in each image sensor at the exposure timing controlled by the rotation of the rotating plate 2, and the read frame signals are written into the memory at the respective timings, and read out in accordance with the timings to perform a wide dynamic range process. Is done.

  Finally, the wide dynamic range processing in each of the second embodiment and the third embodiment will be compared. FIG. 11 is a graph in which the horizontal axis represents the amount of incident light (input exposure amount) and the vertical axis represents the effective D range. The signal (a) is a signal level obtained when the image sensor A3 in the second embodiment and the third embodiment passes through a transmissive part having a transmittance of 100%, and the D range of the image sensor shown in the graph. It is assumed that the signal can be obtained without saturation to the limit. The signal (b) is a signal level obtained when the image sensor A3 according to the third embodiment passes through a transmissive part with a transmittance of 50%, and the signal (c) is obtained in the second and third embodiments. It is a signal level obtained when it passes 10% of the reflection part from the image sensor B4 in the embodiment.

  In the second embodiment, since the composite signal (X) obtained by adding the signal (a) and the signal (c) in FIG. 11 is obtained, the effective D range is (x). On the other hand, in the third embodiment, since the combined signal (Y) obtained by adding the signal (a), the signal (b), and the signal (c) is obtained, the effective D range is (y). That is, in the third embodiment, since the signals of the three types of exposure amounts are combined, the effective D range is increased as compared to the second embodiment in which the signals of the two types of exposure amounts are combined ((x ) <(Y)).

  By the way, the output signal of the imaging device has a physical signal output limit (maximum output value) as shown in FIG. 12, and the obtained composite signal (X) and composite signal (Y) are output at a certain maximum output. It is necessary to normalize to the value. In the case of normalization at a constant ratio for simplicity, the combined signal (X) and the combined signal (Y) are respectively an output signal (X ′) and an output signal (Y ′). In the case of the output signal (X ′) obtained by synthesizing two types of frame signals according to the second embodiment, there is one broken line point, and the signal level changes abruptly here, whereas according to the third embodiment. In the case of an output signal (Y ′) obtained by synthesizing three types of frame signals, there are two broken line points, and the signal level changes gently, so that a wide dynamic range can be reproduced with a more natural gradation. it can. Therefore, according to the third embodiment, natural gradation expression can be achieved while having a wide effective dynamic range as compared with the second embodiment.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and includes design changes and the like without departing from the gist of the present invention. .

1 is a block diagram illustrating a configuration of an imaging apparatus according to a first embodiment of the present invention. It is a block diagram which shows the structure of the video signal synthetic | combination part with which the imaging device by the 1st Embodiment of this invention is provided. It is a schematic diagram which shows the structure of the rotating plate with which the imaging device by the 1st Embodiment of this invention is provided. It is a timing chart which shows the imaging sequence of the imaging device by the 1st Embodiment of this invention. It is a block diagram which shows the structure of the imaging device by the 2nd Embodiment of this invention. It is a schematic diagram which shows the structure of the rotating plate with which the imaging device by the 2nd Embodiment of this invention is provided. It is a timing chart which shows the imaging sequence of the imaging device by the 2nd Embodiment of this invention. It is a schematic diagram which shows the structure of the rotating plate with which the imaging device by the 3rd Embodiment of this invention is provided. It is a block diagram which shows the structure of the video signal synthetic | combination part with which the imaging device by the 3rd Embodiment of this invention is provided. It is a timing chart which shows the imaging sequence of the imaging device by the 3rd Embodiment of this invention. It is a graph for demonstrating the comparison of the wide dynamic range process by the 2nd Embodiment and 3rd Embodiment of this invention. It is a graph for demonstrating the comparison of the wide dynamic range process by the 2nd Embodiment and 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lens, 2 ... Rotating plate, 3 ... Imaging element A, 4 ... Imaging element B, 5 ... Signal processing part, 6 ... Timing generator, 7 ... Imaging control , 8 ... Rotary plate controller, 9 ... Rotary plate drive unit, 10 ... Optical viewfinder, 20 ... Transmission region, 21 ... Reflection region, 22a ... Reflection angle A region , 22b ... reflection angle B area, 23a ... transmission area A, 23b ... transmission area B, 24a ... reflection area A, 24b ... reflection area B, 50 ... video signal synthesis unit , 51a, 51b, 51c, 51d, 51e, 51f... Memory, 52.

Claims (9)

An optical system that collects light from the subject;
A rotating plate having a transmission part that transmits the optical image collected by the optical system, and a reflection part that reflects the optical image collected by the optical system;
A first image sensor that photoelectrically converts an optical image transmitted through the transmission unit and outputs a first image signal;
A second imaging element that photoelectrically converts an optical image reflected by the reflecting unit and outputs a second image signal;
A video signal combining unit that combines the first image signal and the second image signal;
An imaging device comprising: An optical system that collects light from the subject;
A transmission unit that transmits an optical image collected by the optical system, and a first reflection unit that has an inclination of a first angle with respect to a reference axis and reflects the optical image collected by the optical system And a rotating plate having a second angle with respect to the reference axis and having a second reflecting portion that reflects the optical image collected by the optical system,
A first imaging element that photoelectrically converts an optical image transmitted through the transmission unit and outputs a first image signal;
A second imaging device that photoelectrically converts an optical image reflected by the first reflecting section and outputs a second image signal;
An optical viewfinder for displaying an optical image reflected by the second reflecting section;
A video signal combining unit that combines the first image signal and the second image signal;
An imaging device comprising:   The transmittance of the transmissive part and the reflectance of the reflective part are set so that the amount of light transmitted through the transmissive part and the light quantity reflected by the reflective part are different. Imaging device.   The imaging device according to claim 1, wherein areas of the transmission unit and the reflection unit irradiated with light collected by the optical system are different.   3. The normal axes of the reflecting surfaces of the first reflecting portion and the second reflecting portion are both inclined with respect to the optical axis of the light collected by the optical system. The imaging device described in 1.   The transmittance of the transmissive portion and the reflectance of the first reflective portion are set so that the amount of light transmitted through the transmissive portion is different from the amount of light reflected by the first reflective portion. The imaging device according to claim 2.   The imaging apparatus according to claim 2, wherein the areas of the transmission unit and the first reflection unit irradiated with light collected by the optical system are different.   The imaging apparatus according to claim 1, wherein the first image sensor and the second image sensor have different electronic shutter speeds. The imaging apparatus according to claim 1, wherein the rotating plate includes a plurality of transmission units having different transmittances.

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