JP4027731B2 - Electronic camera - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interchangeable lens electronic camera.
[0002]
[Prior art]
An electronic camera (digital camera) that electronically stores a still image or a moving image has an imaging unit that converts a subject image formed by a photographing lens into an electrical signal (pixel signal). The imaging unit includes, for example, a CCD, an infrared cut filter, a low-pass filter, and the like.
[0003]
In an interchangeable lens type electronic camera such as an interchangeable lens single-lens reflex camera, dust, dust, etc. (hereinafter collectively referred to as “dust”) enter the camera body when the lens is replaced, and this dust is captured by the imaging unit. May adhere to the surface (light receiving surface). When dust adheres to the light receiving surface of the image pickup unit, even a very small dust (for example, about 10 to 20 μm) appears in the photographed image and causes an image defect. For example, the light receiving surface is cleaned using a blower (blower) or the like. It is necessary to remove the attached dust.
[0004]
However, the image pickup unit is usually installed in a deep part of the camera body, and the light receiving surface thereof is difficult to look dark because external light does not reach. For this reason, it is difficult to find where dust is attached to the light receiving surface of the imaging unit, and it is difficult to know which part should be cleaned. It was also difficult to tell if the trash could be removed. For this reason, it has not been possible to efficiently clean the light receiving surface of the imaging unit.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide an interchangeable lens type electronic camera capable of efficiently cleaning a light receiving surface of an imaging unit.
[0006]
[Means for Solving the Problems]
Such an object is achieved by the present inventions (1) to (10) below.
[0007]
(1) An interchangeable lens electronic camera having a camera body and a photographic lens that is detachable from the camera body,
An imaging unit having an imaging element;
Illuminating means for illuminating the light receiving surface of the imaging unit;
A mode setting means that can be set to a photographing mode capable of photographing and a cleaning mode for cleaning the light receiving surface;
An electronic camera configured to be in a light-receiving surface illumination state in which light is emitted from the illumination unit to illuminate the light-receiving surface when the cleaning mode is set.
[0008]
Thereby, at the time of the cleaning operation of the light receiving surface of the imaging unit, dust on the light receiving surface can be easily seen, and the cleaning operation can be performed efficiently and effectively.
[0009]
(2) In the above (1), the illumination unit is installed outside the imaging region of the imaging unit, and the light projecting direction from the illumination unit to the light receiving surface is inclined with respect to the light receiving surface. The electronic camera described.
Thereby, the dust on the light receiving surface can be more easily seen.
[0010]
(3) The electronic camera according to (1) or (2), wherein the illumination unit projects white light.
Thereby, the dust on the light receiving surface can be more easily seen.
[0011]
(4) The electronic camera according to any one of (1) to (3), wherein a light source of the illuminating unit is formed of a light emitting diode.
Thereby, the dust on the light receiving surface can be more easily seen.
[0012]
(5) The electronic camera according to any one of (1) to (4), wherein when the cleaning mode is set, the light receiving surface is illuminated after the release button is pressed.
[0013]
As a result, erroneous operation can be prevented more reliably, and the light receiving surface illumination state can be maintained without pressing the release button.
[0014]
(6) The electronic camera according to any one of (1) to (5), wherein when the release button is pressed in the light receiving surface illumination state, the light receiving surface illumination state is canceled.
[0015]
As a result, it is possible to prevent erroneous operation more reliably and to cancel the light receiving surface illumination state and return to the original state with a simple operation.
[0016]
(7) having lens mounting detection means for detecting that the photographing lens is mounted on the camera body;
The electronic camera according to any one of (1) to (6), wherein the cleaning mode is canceled when it is detected that the photographing lens is attached to the camera body when the cleaning mode is set.
[0017]
As a result, it is possible to more reliably prevent an adverse effect caused by the careless cancellation of the cleaning mode, and it is possible to quickly move to a photographing operation after cleaning, thereby improving usability.
[0018]
(8) The electronic camera according to any one of (1) to (7), wherein the imaging unit is installed such that a light receiving surface thereof is perpendicular to an optical axis of the photographing lens.
Thereby, the structure of the optical system of an electronic camera can be simplified.
[0019]
(9) having a mirror rotatably installed at a first position for reflecting the light beam from the photographing lens and a second position retracted from the optical path of the light beam from the photographing lens;
The electronic camera according to any one of (1) to (8), wherein the mirror is retracted to the second position when the light receiving surface is illuminated.
[0020]
Thereby, even if it has a mirror which can reflect the light beam from a photographic lens, the light-receiving surface of an imaging unit can be cleaned easily and rapidly.
[0021]
(10) having a mechanical shutter installed on the light receiving surface side of the imaging unit;
The electronic camera according to any one of (1) to (9), wherein the mechanical shutter is fully opened when the light receiving surface is illuminated.
[0022]
Thereby, even if it has a mechanical shutter, the light-receiving surface of an imaging unit can be cleaned easily and rapidly.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electronic camera of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
[0024]
1 and 2 are cross-sectional side views showing an internal configuration in an embodiment of an electronic camera of the present invention (photographing lens is omitted), and FIG. 3 is a front view showing an embodiment of the electronic camera of the present invention (photographing). 4 is a perspective view schematically showing the imaging unit, and FIG. 5 is a block diagram showing an internal configuration in the embodiment of the electronic camera of the present invention.
[0025]
The electronic camera 1 shown in these drawings is a lens interchangeable single-lens reflex electronic camera including a camera body 2 and a photographing lens 3 that is detachable from the camera body 2. The photographic lens 3 includes a photographic lens system (not shown), a diaphragm (not shown), a lens CPU 31, a focusing lens 32, and a gear unit 33 (see FIG. 5).
[0026]
As shown in FIG. 1, the camera body 2 has an imaging unit 4 having a CCD (imaging device) 41 and a shutter unit (mechanical shutter) 21 installed on the light receiving surface 45 side of the imaging unit 4 as main optical configurations. And a main mirror 22, a focusing screen 26, a pentaprism 27, and an eyepiece lens 28, respectively. As shown in FIGS. 1 and 3, a mount portion 24 for detachably attaching the photographing lens 3 is provided on the front surface of the camera body 2.
[0027]
In addition, as shown in FIG. 5, a main CPU (control unit) 50 that centrally controls the camera body 2 and the photographing lens 3 is provided in the camera body 2, and the main CPU 50 is configured to perform autofocus ( AF) control, photographing control, various operation control based on operation of various operation switches, and the like are performed.
[0028]
The main CPU 50 is connected to the lens CPU 31 in the photographic lens 3 via a contact terminal provided in the lens mount unit, and performs various information communication such as lens-specific data, the state of the photographic lens 3 or the state on the camera side. It has become. Thereby, the main CPU 50 can also detect whether or not the taking lens 3 is attached to the camera body 2.
[0029]
The main CPU 50 includes an AF sensor 51, a photometric sensor 52, an AF motor 53, a DSP (Digital Signal Processor) 54, a photometric switch 55, a release switch 56, a mode switch 57, a motor driver 60, a shutter drive circuit 61, and the like. It is connected.
[0030]
As shown in FIG. 1, the imaging unit 4 is installed so as to cover a casing 42 having a rectangular shallow recess, a flat CCD 41 installed in the recess of the casing 42, and an opening of the recess of the casing 42. An infrared cut filter (infrared absorption filter) 43 and a low-pass filter 44 installed on the front side of the infrared cut filter 43 are configured, and an outer surface of the low-pass filter 44 is a light receiving surface 45.
[0031]
The infrared cut filter 43 removes an infrared wavelength component from the subject light from the photographing lens 3 and prevents the imaging unit 4 from receiving infrared light that is invisible to human eyes. The low-pass filter 44 reduces the spatial frequency component close to the sampling spatial frequency determined by the pixel interval of the CCD 41 from the spatial frequency of the subject light, thereby generating false color (moire) in the subject image data. To prevent.
[0032]
The imaging unit 4 is installed such that the light receiving surface 45 is perpendicular to the optical axis Ax of the photographing lens 3 attached to the mount portion 24. The optical axis Ax matches the center of the imaging area of the imaging unit 4.
[0033]
The shutter unit 21 is a so-called focal plane shutter, and is installed so as to face the light receiving surface 45 of the imaging unit 4. The shutter unit 21 has a front curtain and a rear curtain. During exposure, the shutter unit 21 moves through a slit having an arbitrary interval formed between the front curtain and the rear curtain so as to cross the front of the light receiving surface 45 at a predetermined speed. As a result, the light flux from the photographic lens 3 reaches the light receiving surface 45. The shutter unit 21 is driven by a shutter drive circuit 61. Further, the shutter unit 21 is brought into a charged state in preparation for photographing by a charge motor 59 driven through a motor driver 60 (see FIG. 5).
[0034]
A main mirror 22 is provided between the shutter unit 21 and the photographing lens 3. The main mirror 22 is installed so as to be rotatable about a rotation shaft 221 provided in the vicinity of the upper end portion thereof, and is between the first position shown in FIG. 1 and the second position shown in FIG. Rotate. The main mirror 22 is operated by the driving force of the mirror motor 58 driven via the motor driver 60.
[0035]
In the observation state shown in FIG. 1, most of the luminous flux (subject light) that has passed through the photographing lens 3 and entered the camera body 2 is reflected by the main mirror 22 and enters the focusing screen 26. Further, a part of the main mirror 22 is a half mirror, and a part of the light flux from the photographing lens 3 is transmitted through the main mirror 22 and is lowered by a sub mirror 25 provided on the back side of the main mirror 22. It is reflected and enters the AF sensor 51 (see FIG. 5).
[0036]
In the state shown in FIG. 2, the main mirror 22 is in a state of being retracted from the optical path of the light beam from the photographing lens 3, and the light beam from the photographing lens 3 is not reflected by the main mirror 22, and the imaging unit. 4 can be incident.
[0037]
As shown in FIG. 5, in the observation state, the reflected light from the main mirror 22 forms an image on the focusing screen 26 at a position optically equivalent to the light receiving surface 411 of the CCD 41 and then enters the pentaprism 27. To do. The light beam reflected by the pentaprism 27 exits through the eyepiece lens 28. Thereby, the user can observe the imaging state on the focusing screen 26 by the photographing lens 3 through the eyepiece.
[0038]
A part of the reflected light from the pentaprism 27 enters the photometric sensor 52. The photometric sensor 52 outputs a photometric signal corresponding to the amount of received light to the main CPU 50. The main CPU 50 calculates and drives and controls the charge accumulation time (exposure time) of the CCD 41 and the aperture amount (aperture value) of an aperture (not shown) provided on the photographing lens 3 side based on the photometric signal.
[0039]
The AF sensor 51 is a so-called phase difference type distance measuring sensor. The AF sensor 51 has a CCD sensor at a position optically equivalent to the light receiving surface 411 of the CCD 41, and indicates a focus state in a predetermined focus detection area in a photographing screen (not shown). It is output to the main CPU 50 as an AF video signal. The main CPU 50 calculates the defocus amount based on the AF video signal, and the light flux incident on the focusing lens 32 forms an image on the focusing screen 26 based on the defocus amount and lens data specific to the photographing lens 3. The lens driving direction and driving amount up to the position of the focusing lens 32 to be operated are calculated, and the AF motor 53 is driven and controlled (AF driving control). The driving force of the AF motor 53 is transmitted to the gear unit 33 through a joint provided in the mount portion 24 of the camera body 2 and a joint provided in the mount portion on the photographing lens 3 side, and the focusing lens 32 is moved to the optical axis. Driven in the direction.
[0040]
The CCD 41 of the imaging unit 4 is driven and controlled by the DSP 54. The DSP 54 generates image data from the drive control of the CCD 41 and the pixel signal from the CCD 41, and performs image processing and image recording processing such as image data compression processing and image data recording processing to the CF memory card (recording medium) 100. The processor controls the overall operation and is connected to the main CPU 50 to communicate with each other so that control can be coordinated.
[0041]
The camera body 2 is provided with a release button (not shown). The photometry switch 55 is turned on when the release button is half-pressed, and the release switch 56 is turned on when the release button is fully pressed. To do.
[0042]
Further, the camera body 2 is provided with an operation mode setting button (not shown), and the mode switch 57 is turned on in response to a pressing operation of the operation mode setting button and can be photographed every time it is turned on. The mode is switched between the photographing mode and the cleaning mode for cleaning the light receiving surface 45 of the imaging unit 4.
[0043]
In such an electronic camera 1, illumination that illuminates the light receiving surface 45 in order to make it easy to see dust, dust, dirt, and the like (hereinafter collectively referred to as “dust”) on the light receiving surface 45 of the imaging unit 4. As a means, an LED (light emitting diode) 7 that generates illumination light is installed. In the present invention, when the photographing lens 3 is detached from the camera body 2 and the light receiving surface 45 is cleaned, the LED 7 is turned on to illuminate the light receiving surface 45 so that the dust 500 attached to the light receiving surface 45 can be easily seen. Can do. As a result, even if the dust 500 is very small, it is easy to find a place where the dust 500 is attached, that is, a place to be cleaned, and it is easy to confirm whether the dust 500 has been removed. Therefore, the cleaning operation of the light receiving surface 45 can be performed efficiently and quickly without causing the dust 500 to remain.
[0044]
The method of cleaning the light receiving surface 45 may be any method. For example, the dust 500 is blown away using a blower (blower), the dust 500 is sucked out using a suction device, or the dust 500 is used using a wiper. This can be done by wiping off.
[0045]
In the present invention, the color of the illumination light projected onto the light receiving surface 45 may be any color, but is preferably white light. In the present embodiment, the LED 7 is a white LED and projects white light. Thereby, it is possible to make the dust 500 easier to see than in the case of red light, blue light, green light, and the like.
[0046]
In the present embodiment, as shown in FIGS. 2 and 3, two LEDs 7 are installed near the front of the shutter unit 21 and below the imaging unit 4. When the LED 7 is installed on the lower side of the imaging unit 4, the installation space can be easily secured without interfering with the focusing screen 26 and the power transmission mechanism to the main mirror 22.
[0047]
Further, in the present embodiment, as shown in FIG. 2, the LED 7 is located below (outside) the imaging area (space on the imaging area) of the imaging unit 4, and thereby the LED 7 and the light receiving surface 45. The light projecting direction is not perpendicular to the light receiving surface 45 but inclined more than 45 degrees with respect to the normal line of the light receiving surface 45 (tilted toward the light receiving surface 45). As a result, the illumination light from the LED 7 is reflected in the dust 500 shiningly, or the shadow 501 of the dust 500 appears for a long time, so that the dust 500 can be seen more easily (see FIG. 4).
[0048]
In the present invention, the illuminating means for illuminating the light receiving surface 45 includes a light source and optical elements such as a lens, a mirror, and a prism, and illumination light from the light source is sent to the light receiving surface 45 via these optical elements. It may be something that projects light. Further, the light source is not limited to the LED but may be a halogen lamp or the like, but the LED is desirable in consideration of the size, power consumption of the built-in battery, and the like. The number of illumination means (light sources) may be one or three or more.
[0049]
Next, the control operation of the main CPU 50 when the shooting mode is set by operating the operation mode setting button will be described.
[0050]
When the release button is pressed halfway and the photometry switch 55 is turned on, the main CPU 50 performs photometry, exposure calculation, and AF driving as described above. Further, when the release button is fully pressed and the release switch 56 is turned on, the mirror motor 58 is driven via the motor driver 60 to retract the main mirror 22 and the sub mirror 25 to the second position outside the photographing optical path. After the aperture value (not shown) is controlled to the calculated aperture value, the shutter drive circuit 61 is controlled to perform the calculated exposure time and exposure control. After the exposure time elapses, the main CPU 50 controls the shutter of the shutter unit 21 and then drives the charge motor 59 to perform shutter charging.
[0051]
On the other hand, the DSP 54 performs unnecessary charge sweeping control and charge accumulation control of the CCD 41 in conjunction with the shutter drive control, and after the shutter unit 21 is in a shielded state, transfer of the accumulated charge of the CCD 41 and image data generation processing, JPEG A known image data compression process is performed. Thereafter, the DSP 54 records the obtained compressed image data on the CF memory card 100.
[0052]
Next, the control operation of the main CPU 50 when the cleaning mode is set by operating the operation mode setting button will be described. FIG. 6 is a flowchart showing the control operation in the cleaning mode. Hereinafter, description will be given based on this flowchart.
[0053]
In the cleaning mode, the main CPU 50 performs control using the flag F_LED as a flag indicating whether or not the light receiving surface illumination state in which the LED 7 is lit to illuminate the light receiving surface 45 of the imaging unit 4 is set. The state of flag F_LED = 0 indicates that the light receiving surface is not illuminated, and the state of flag F_LED = 1 indicates that the light receiving surface is illuminated.
[0054]
When the photographing lens 3 is detached from the camera body 2 and the cleaning mode is selected, the flag F_LED = 0 is set (step S001).
[0055]
When the release button is pressed (fully pressed) and the release switch 56 is turned on (step S002), it is determined whether or not the flag F_LED = 0 (step S003).
[0056]
When the flag F_LED = 0, the light receiving surface illumination state as described below is set. That is, the mirror motor 58 is driven via the motor driver 60 to retract the main mirror 22 and the sub mirror 25 to the second position outside the imaging optical path (mirror up) (step S004), and the shutter drive circuit 61 is controlled. Then, only the front curtain shutter of the shutter unit 21 is run to fully open the aperture (step S005), and the LED 7 is turned on to illuminate the light receiving surface 45 (step S006). In this way, in the light receiving surface illumination state, the light receiving surface 45 is exposed and the light receiving surface 45 is illuminated by mirror-up and full shutter opening, so that the light receiving surface 45 can be efficiently and effectively cleaned.
[0057]
As described above, in the present embodiment, when the cleaning mode is selected, the light receiving surface is illuminated after the release button is pressed. Thereby, there is little possibility of an erroneous operation and it can prevent unintentionally going into a light-receiving surface illumination state.
[0058]
When the light receiving surface is illuminated, it is detected that the release button has been released, that is, the release switch 56 has been turned off (step S007), then the flag F_LED = 1 is set (step S008), and the process returns to step S002. Then, the state of the release switch 56 is monitored again.
[0059]
When the release button is pressed again and the release switch 56 is turned on (step S002), it is determined whether or not the flag F_LED = 0 (step S003). If the flag F_LED = 1 instead of the flag F_LED = 0, That is, when the light receiving surface illumination state is set, the light receiving surface illumination state is canceled. That is, the mirror motor 58 is driven via the motor driver 60 to move the main mirror 22 and the sub mirror 25 to the observation state position (the first position) (mirror down) (step S009), and the shutter drive circuit 61. And the aperture of the shutter unit 21 is caused to travel to the fully closed state (shielded state) (step S010), and the charge motor 59 is driven via the motor driver 60 to perform shutter charging. (Step S011), the LED 7 is turned off (Step S012).
[0060]
As described above, in this embodiment, after the light receiving surface illumination state is set, it is detected that the release button is pressed again, and the light receiving surface illumination state is canceled. As a result, the light receiving surface illumination state can be maintained and the light receiving surface 45 can be observed and cleaned without pressing the release button, and the light receiving surface illumination state can be canceled and returned to the original state with a simple operation. Can do.
[0061]
When the light receiving surface illumination state is canceled, the flag F_LED = 0 is set (step S013), the process returns to step S002, and the state of the release switch 56 is monitored.
[0062]
If the release switch 56 is not turned on, the state of the mode switch 57 is monitored to determine whether or not the cleaning mode is selected (step S013). If the cleaning mode is still selected, the process returns to step S002. If the cleaning mode is not selected (when the shooting mode is selected), the cleaning mode is canceled and the shooting mode is restored. .
[0063]
FIG. 7 is a flowchart showing a control operation in the cleaning mode according to another embodiment of the present invention. Hereinafter, the control operation in the cleaning mode according to another embodiment of the present invention will be described based on this flowchart, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted. .
[0064]
In the above-described embodiment, the light-receiving surface illumination state is canceled and returned to the original state by turning on the release switch 56 for the second time, but in this embodiment, the photographing lens 3 is attached to the camera body 2. When this is detected, the light receiving surface illumination state is canceled and the cleaning mode is also canceled. This will be described in more detail below.
[0065]
When the photographing lens 3 is detached from the camera body 2 and the cleaning mode is selected, the flag F_LED = 0 is set (step S101).
[0066]
As in the above-described embodiment, the release switch 56 is turned on (step S102), the mirror is raised (step S103), the front curtain shutter travel (step S104), and the LED 7 is turned on (step S105). Set the lighting state. If the light-receiving surface illumination state is set, the flag F_LED = 1 is set (step S106), and the process returns to step S102.
[0067]
Then, lens communication is performed (step S107), and it is determined whether or not the photographing lens 3 is attached (step S108). If it is detected that the photographing lens 3 is attached, it is determined whether or not the flag F_LED = 1, that is, whether or not the light receiving surface is illuminated (step S109), and the flag F_LED = 1 (light receiving surface illumination). In the case of the state, the mirror is lowered (step S110), the rear curtain shutter travel (step S111), the shutter charge (step S112), and the LED 7 is turned off (step S109) to cancel the light receiving surface illumination state. When the light receiving surface illumination state is cancelled, after setting the flag F_LED = 0 (step S114), the cleaning mode is canceled and the photographing mode is restored. If the flag F_LED = 0 in step S109, that is, if the light receiving surface is not illuminated, the cleaning mode is canceled as it is and the photographing mode is restored.
[0068]
If the mounting of the taking lens 3 is not detected in step S108, it is determined whether or not the cleaning mode is selected (step S102). If the cleaning mode is still selected, the process returns to step S102. When the cleaning mode is not selected (when the shooting mode is selected), the cleaning mode is canceled and the shooting mode is restored.
[0069]
As described above, in the present embodiment, the mounting of the photographing lens 3 is detected, the light receiving surface illumination state and the cleaning mode are canceled, and the returning operation to the photographing mode is performed. It is possible to more reliably prevent the main mirror 22 and the shutter unit 21 from being damaged due to down and rear curtain shutter travel. Furthermore, since the camera automatically switches to the shooting mode when the photographic lens 3 is attached, it is possible to quickly move to the shooting operation after cleaning, and it is easy to use and more reliably prevents erroneous operations such as shooting in the cleaning mode. You can also
[0070]
As mentioned above, although the electronic camera of the present invention has been described with respect to the illustrated embodiment, the present invention is not limited to this, and each component constituting the electronic camera has an arbitrary configuration that can exhibit the same function. Can be substituted. Moreover, arbitrary components may be added.
[0071]
For example, the installation location of the imaging unit is not limited to a location where the light receiving surface is perpendicular to the optical axis of the photographic lens, and may be, for example, the upper, lower, or side in the camera body. In this case, a mirror that reflects the light flux from the photographing lens toward the imaging unit may be provided, and the mirror may be retracted from the optical path of the light flux from the photographing lens in the light receiving surface illumination state.
[0072]
In addition, the present invention is not limited to the interchangeable lens single-lens reflex electronic camera, for example, a range finder type having a finder optical system independent of the photographing optical system without having a mirror that can reflect the light beam from the photographing lens. The present invention can also be applied to a lens interchangeable electronic camera. Further, the electronic camera of the present invention may be one that does not have a mechanical shutter installed on the light receiving surface side of the imaging unit.
[0073]
In the electronic camera of the present invention, the control operation in the cleaning mode may be a combination of the two embodiments described above. Alternatively, the light-receiving surface illumination state may be controlled immediately after entering the cleaning mode.
[0074]
【The invention's effect】
As described above, according to the present invention, when the light receiving surface of the imaging unit is cleaned, the light receiving surface is illuminated by the illuminating means, so that dust attached to the light receiving surface can be easily seen. Therefore, it is easy to find a place where dust to be cleaned is attached, and it is easy to confirm whether or not the dust has been removed. For this reason, the cleaning operation of the light receiving surface can be performed efficiently and promptly and without leaving any dust.
[0075]
Also, when the cleaning mode is set, waiting for the release button to be pressed to enter the light receiving surface illumination state, or waiting for the release button to be pressed to release the light receiving surface illumination state. If it is determined that the cleaning mode is canceled when it is detected that the photographic lens is attached when the cleaning mode is set, the usability can be improved and erroneous operation can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view (observation state) showing an internal configuration in an embodiment of an electronic camera of the present invention.
FIG. 2 is a cross-sectional side view (light-receiving surface illumination state) showing an internal configuration in the embodiment of the electronic camera of the present invention.
FIG. 3 is a front view (light-receiving surface illumination state) showing the embodiment of the electronic camera of the present invention.
FIG. 4 is a perspective view schematically showing an imaging unit.
FIG. 5 is a block diagram showing an internal configuration in an embodiment of the electronic camera of the present invention.
FIG. 6 is a flowchart showing a control operation in a cleaning mode in the embodiment of the electronic camera of the present invention.
FIG. 7 is a flowchart showing a control operation in a cleaning mode in another embodiment of the electronic camera of the present invention.
[Explanation of symbols]
1 Electronic camera
2 Camera body
21 Shutter unit
22 Main mirror
221 rotation axis
24 Mount part
25 Submirror
26 Focus plate
27 Penta prism
28 Eyepiece lens
3 Shooting lens
31 Lens CPU
32 Focusing lens
33 Gear unit
4 Imaging unit
41 CCD
411 Light receiving surface
42 Casing
43 Infrared cut filter
44 Low-pass filter
45 Photosensitive surface
50 Main CPU
51 AF sensor
52 Photometric sensor
53 AF motor
54 DSP
55 Metering switch
56 Release switch
57 Mode switch
58 Mirror motor
59 Charge motor
60 Motor driver
61 Shutter drive circuit
7 LED
100 CF memory card
500 garbage
501 Shadow
Steps S001 to S014, S101 to S115
Ax optical axis

Claims (10)

An interchangeable lens type electronic camera having a camera body and a photographic lens that is detachable from the camera body,
An imaging unit having an imaging element;
Illuminating means for illuminating the light receiving surface of the imaging unit;
A mode setting means that can be set to a photographing mode capable of photographing and a cleaning mode for cleaning the light receiving surface;
An electronic camera configured to be in a light-receiving surface illumination state in which light is emitted from the illumination unit to illuminate the light-receiving surface when the cleaning mode is set. 2. The electronic camera according to claim 1, wherein the illumination unit is installed outside an imaging region of the imaging unit, and a light projecting direction from the illumination unit to the light receiving surface is inclined with respect to the light receiving surface. . The electronic camera according to claim 1, wherein the illumination unit projects white light. The electronic camera according to claim 1, wherein a light source of the illuminating unit is formed of a light emitting diode. 5. The electronic camera according to claim 1, wherein when the cleaning mode is set, the light receiving surface is illuminated after the release button is pressed. 6. The electronic camera according to claim 1, wherein when the release button is pressed in the light receiving surface illumination state, the light receiving surface illumination state is canceled. A lens attachment detection means for detecting that the photographing lens is attached to the camera body;
7. The electronic camera according to claim 1, wherein the cleaning mode is canceled when it is detected that the photographing lens is attached to the camera body when the cleaning mode is set. The electronic camera according to claim 1, wherein the imaging unit is installed such that a light receiving surface thereof is perpendicular to an optical axis of the photographing lens. A mirror disposed rotatably at a first position for reflecting the light beam from the photographing lens and a second position retracted from the optical path of the light beam from the photographing lens;
The electronic camera according to claim 1, wherein the mirror is retracted to the second position in the light receiving surface illumination state. Having a mechanical shutter installed on the light receiving surface side of the imaging unit;
The electronic camera according to claim 1, wherein the mechanical shutter is fully opened in the light receiving surface illumination state.

Images