JPH0879633A - Photographing device - Google Patents

Abstract

PURPOSE: To provide a photographing device which can remove dust adhered to an image pickup part constituted by a CCD and the like with simple structure. CONSTITUTION: The lens barrel 42 of an image pickup unit 30 is fixed to a film image input device main body. A fixing stand 46 is fixed on the flange 44 of the lens barrel 42. A pedestal 52 to which a CCD line sensor 36 is fitted is supported to the fixing stand 46 through flat springs 54, 54..., and it can be vibrated against the fixing stand 46 by the elastic force of the flat springs 54, 54... A piezo element 60 is provided for the arm 62 of the fixing stand 46, and the end part of the piezo element 60 is made abutted on the peripheral part 52A of the pedestal 52. When a drive circuit 68 is driven and voltage is impressed on the piezo element 60, the pedestal 52 is hammered by the piezo element 60 by the stress deformation of the piezo element 60 and it vibrates. Thus, the CCD line sensor 36 is vibrated through the pedestal 52, and dust adhered to the CCD line sensor 36 is removed by the vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing device, and more particularly to a photographing device such as a camera using a solid-state image pickup device such as CCD as an image pickup unit, a camera-integrated VTR, and a film image input device.

[0002]

2. Description of the Related Art An image pickup unit is mounted on a main body of a photographing apparatus so that dust does not adhere to a light receiving surface of a CCD or a low-pass filter, and as a device for preventing dust from being attached after mounting, it is disclosed in Japanese Patent Laid-Open No. 62- There is one disclosed in Japanese Patent No. 147963. In this dust adhesion preventing structure, a cover is provided so as to move forward and backward with respect to the front surface of the light receiving surface of the CCD, and the cover is closed when not in use. However,
In the image pickup apparatus disclosed in Japanese Patent Laid-Open No. 62-147963, CC is used.
Once dust adheres to the light receiving surface of D, there is a drawback that the dust cannot be removed.

Therefore, in a photographing device disclosed in Japanese Patent Laid-Open No. 1-113463 as a photographing device for solving such a problem, a vacuum duct having a suction port is provided in front of the light receiving surface of the CCD. By sucking air in the vicinity of the light receiving surface of the CCD with the duct for dust, dust adhering to the light receiving surface and dust in the vicinity thereof are removed.

[0004]

However, in the image pickup apparatus disclosed in Japanese Patent Laid-Open No. 1-113463, since the vacuum duct is provided, the image pickup apparatus becomes large in scale.
Further, since a suction fan must be provided, there is a drawback that the entire apparatus becomes complicated. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an imaging device capable of removing dust adhering to an imaging unit with a simple structure.

[0005]

In order to achieve the above-mentioned object, the present invention provides a photographing apparatus having a photographing unit for photographing a subject through a photographing lens, wherein the photographing unit is provided with an elastic body. It is characterized in that it is supported by the main body of the photographing apparatus and is provided with a vibration imparting means for vibrating the image pickup section, and the vibration imparting means vibrates the image pickup section to remove dust adhering to the image pickup section.

[0006]

According to the present invention, when dust adheres to the image pickup unit, the image pickup unit is vibrated by the vibration applying means and the dust is removed from the image pickup unit by the vibration. It is possible to remove dust adhering to the surface with a simple structure.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the photographing apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a structural diagram in which the photographing apparatus according to the present invention is applied to a film image input apparatus. A film cartridge 12 is mounted in the main body 10 of the film image input device shown by the chain double-dashed line in the figure. In the film cartridge 12, a developed photographic film 14 is wound around a spool 16 in advance. The photographic film 14 is fed from the film cartridge 12 by a film driving mechanism and then fed in the direction of the arrow in FIG. To be done.

The film drive mechanism is engaged with the spool 16 of the film cartridge 12, and is engaged with a film supply portion for rotating the spool 16 in the forward / reverse direction, and a take-up spool 20 of the film take-up chamber 18, and the film is driven. A film winding unit that winds up the photo film 14 delivered from the supply unit, and a photo film 14 delivered from the film supply unit.
And a pinch roller 24, 24 between which the capstan 22 and 22 are sandwiched and the film is fed at a constant speed.

The film supply section drives the spool 16 of the film cartridge 12 clockwise in the drawing,
From the film cartridge 12 to the photographic film 14 until the leading end of the film is taken up by the take-up spool 20.
I am trying to send out. Further, the film supply section is provided with a clutch mechanism for controlling the rotation of the spool 16, and the photographic film 14 is fed with a predetermined tension by the action of the clutch mechanism and the driving force of the capstans 22, 22. To be done.

On the other hand, the image pickup unit 30 has a capstan 2
The light source 32 is installed above the space between the capstans 22 and 22 facing the imaging unit 30. As shown in FIG. 2, the image pickup unit 30 includes photographing lenses 32 and 34 and a CC as an image pickup unit.
It has a D line sensor 36. The CCD line sensor 36 is arranged in a direction orthogonal to the feeding direction of the photographic film 14, and reads the transmission image of the feeding film 14 illuminated by the light source 32 through the taking lenses 32 and 34. The electric signal converted by the photoelectric conversion element of the CCD line sensor 36 is image-processed by the image processing device 38 shown in FIG. 1 and then output as a video signal to the monitor TV 40. This allows the monitor TV 40 to
The image of the photo film 14 is displayed.

As shown in FIG. 2, the taking lenses 32 and 34 of the image pickup unit 30 are held by a lens barrel 42, and the lens barrel 42 is fixed to the film image input apparatus main body 10. A flange 44 is formed on the top of the lens barrel 42, and a fixing base 46 is fixed on the flange 44. An opening portion 50 centering on the optical axis 48 is formed on the fixed base 46, and the transmitted image light of the film is CCD through the opening portion 50.
An image is formed on the light receiving surface of the line sensor 36.

A receiving table 52 is arranged above the fixed table 46. The pedestal 52 is supported by the fixed base 46 via the leaf springs 54, 54 ... And with respect to the fixed base 46, that is, the film image input apparatus main body 10 by the elastic force of the leaf springs 54, 54. It is possible to vibrate. In addition, as with the fixed table 46, the receiving table 52 also has an optical axis 48.
Is formed at the center, and the low-pass filter 35 is attached to the opening 56. The substrate 58 of the CCD line sensor 36 is fixed to the upper surface of the receiving table 52. This allows the CCD line sensor 36 and the fixed base 46 to vibrate.

On the other hand, the piezo element 60 corresponds to the fixed base 46.
It is fitted in the hole 64 of the arm 62 formed so as to project from the peripheral portion of the arm 62 toward the cradle 52. The piezo element 60
2 is positioned by a screw 66 screwed into the hole 64 at a position where the left end in FIG. A drive circuit 62 that applies a voltage to the piezo element 60 is connected to the piezo element 60.

Next, the operation relating to dust removal of the image pickup apparatus constructed as described above will be described. First, before the film image is read by the imaging unit 30, the drive circuit 68
Is driven to apply a voltage to the piezo element 60. When the voltage is applied to the piezo element 60, the pedestal 52 is hammered and vibrated by the piezo element due to stress deformation of the piezo element 60. As a result, the CCD line sensor 36 is vibrated via the pedestal 52, and the vibration removes dust adhering to the low-pass filter 35 and the CCD line sensor 36. Therefore, according to the present embodiment, it is possible to remove the dust attached to the imaging unit with a simple structure.

Then, after the driving circuit 68 is stopped, the reading of the film image is started. As a result, dust is not displayed on the monitor TV 40. Further, in this embodiment,
The frequency and amplitude of the voltage signal applied from the drive circuit 68 to the piezo element 60 are changed with time as shown in FIG. As a result, even a type of dust that cannot be removed with a specific frequency and amplitude can be removed when other frequencies and amplitudes are given. In the case of this embodiment, the frequency is changed in the range of 10 Hz to 10 kHz and the amplitude is changed in the range of 5 μ to 20 μ.

FIG. 4 shows a second embodiment of the image pickup unit 70 applied to the image pickup apparatus according to the present invention. About the same or similar members as the image pickup unit 30 of the first embodiment shown in FIG. Are denoted by the same reference numerals, and description thereof will be omitted. The imaging unit 70 shown in the figure uses a DC motor 72 as a vibration applying unit. The DC motor 72 has a tongue-like portion 74 formed on the edge of the fixed base 56 so as to project.
And a cam-shaped hammer 78 is attached to the rotary shaft 76. When the hammer 78 is rotated, its protrusion 78A is positioned so as to collide with the edge of the pedestal 52.

Therefore, according to the second embodiment thus constructed, when the DC motor 72 is driven, the hammer 78 is driven.
The pedestal 52 vibrates as the protruding portion 78A of the hammer hammers the pedestal 52. Therefore, the dust adhering to the CCD line sensor 36 is removed by the vibration of the receiving table 52. In the present embodiment, the embodiment applied to the film image input device as the photographing device has been described, but the present invention is not limited to this, and if the solid-state image pickup device such as CCD is used as the image pickup unit, a camera or a camera integrated type is used. VTR
It may be applied to a photographing device such as.

Further, in the present embodiment, the piezoelectric element 60 and the DC motor 72 are used as the vibration applying means, but the invention is not limited to this, and it is possible to provide a vibration capable of removing dust to the image pickup section. I wish I had it. Furthermore, in the present embodiment, an example in which one vibration applying unit vibrates in one direction has been described, but the present invention is not limited to this, and a plurality of vibration applying units may be arranged at a predetermined interval. By vibrating in the direction, the dust removal efficiency can be improved.

[0019]

As described above, according to the image pickup apparatus of the present invention, the image pickup section is supported by the image pickup apparatus body through the elastic body, and when dust is attached to the image pickup section, the image pickup section is vibrated. Since it is made to vibrate by the applying means, it is possible to remove the dust adhering to the imaging section with a simple structure. Can be removed.

[Brief description of drawings]

FIG. 1 is a structural diagram showing an embodiment in which a photographing device according to the present invention is applied to a film image input device.

2 is an enlarged cross-sectional view showing a first embodiment of an image pickup unit applied to the image pickup apparatus of FIG.

3 is an explanatory diagram of a voltage signal applied to a piezo element of the image pickup unit shown in FIG.

FIG. 4 is a perspective view showing a second embodiment of the image pickup unit.

[Explanation of symbols]

10 ... Film image input device main body 12 ... Film cartridge 14 ... Photo film 30, 70
… Imaging unit 32, 34… Shooting lens 36… CC
D line sensor 46 ... Fixed base 52 ... Receiving base 54 ... Leaf spring 60 ... Piezo element 68 ... Drive circuit 72 ... DC
Motor 78 ... Hammer

Claims (1)

[Claims] 1. A photographing apparatus having an image pickup section for photographing a subject through a photographing lens, wherein the image pickup section is supported by a photographing apparatus main body via an elastic body, and vibration is applied to vibrate the image pickup section. An image pickup apparatus, characterized in that a means is provided and the image pickup unit is vibrated by the vibration applying unit to remove dust attached to the image pickup unit.