JPH09238275A - Video device incorporating illumination function in head part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize miniaturization and to supply light which can precisely pickup an image without diffusely reflecting a subject image by providing an illumination device for a head part which image-picks up a subject placed on an original stand and providing a polarizing filter which can be attached/detached on an optical output end. SOLUTION: A main body 1, the original stand 7 on which the subject is placed, the head part 3 which image-picks up the subject placed on the original 7 and a connection shaft 9 connecting the main body 1 and the head part 3 are provided. An illumination device is integrally constituted with the head part 3, and the light of halogen or a fluorescent lamp is directly emitted on the subject placed on the original stand 7 from above so as to obtain suitable illuminance. The polarizing filter which can be attached/detached is provided for the optical output end and light which is diffusely reflected is interrupted. Thus, the light of suitable illuminance can be supplied so that the subject image can precisely be image-picked up and the clear image without a blooming phenomenon can be reproduced. Since the illumination device is provided for the head part 3 which image-picks up the subject placed on the original stand 7, a video device is easily miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video device having a head part having a built-in illumination function, and more specifically, it accurately captures an image by an image sensor without causing irregular reflection in a subject image placed on a document table. The present invention relates to a video device in which a head part has a built-in illumination function so that the head part can be illuminated.

[0002]

2. Description of the Related Art Generally, a video device using a CCD element converts an optical image into an electrical signal and outputs the signal, and the output signal is transmitted to a display device such as a monitor or a television and reproduced as an image. It

In the video equipment as described above, recently, the use of video equipment for reading a video of a subject placed on a stage and reproducing it through a TV, which is a separate video display device, is increasing. Mainly in seminars in the fields of education, advertising / design, medicine, etc.
The effect of education is increased by effectively reproducing images that correspond to three-dimensional objects or materials such as color pictorials. As shown in the attached FIG.
A support shaft 21 is formed on each of the left and right sides of the support shaft 21 and is rotatable at a constant angle. A lamp 22 is mounted on the upper end of the support shaft 21 to supply a fixed amount of light to a subject placed on the stage.

After the user positions a document or the like on the stage, the support shaft 21 is mounted on the left and right sides according to the position of the document.
Is adjusted so that the light emitted from the lamp 22 illuminates the original.

However, since the illumination device of the conventional video device is separately mounted on the left and right sides of the main body of the video device, the overall size becomes large and it is difficult to make the device compact.
There is a problem that it is inconvenient to carry. When capturing an image of a document with a coated surface, the lamps mounted on the left and right sides are used with varying angles, but reflections from surrounding fluorescent lamps and various types of illumination cause reflections on the center of the screen. There is a problem that a blooming phenomenon in which a part is white occurs.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in a conventional video device, and in the video device,
An illumination device is configured in the head part that captures the subject placed on the platen, and a removable polarization filter is attached to the light output end to facilitate miniaturization, and the subject image does not scatter and is accurately captured. As described above, the present invention provides an image device in which a head part has a built-in illumination function, which can supply light.

[0007]

In order to solve the above-mentioned problems, an imaging apparatus according to the present invention comprises a main body, an original table mounted on the main body for positioning a subject, and a predetermined amount of light on the original table. And a connecting shaft for connecting the head unit and the main body.

[0008]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a perspective view of a video device according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a lighting device of the video device according to the embodiment of the present invention. As shown in FIG. 2 attached hereto, a video device according to an embodiment of the present invention comprises a main body 1,
A document table 7 on which a subject is placed, a head unit 3 for capturing an image of a subject placed on the document table 7, a main body 1 and a head unit 3
And a connecting shaft 9 for connecting.

As shown in FIG. 3 of the accompanying drawings, the image device according to the embodiment of the present invention has an illuminating device integrally formed with a head part, and a halogen or fluorescent lamp is directly attached to an object placed on the platen from above. To obtain the proper illuminance.

As shown in FIG. 3 attached herewith, the configuration of the head unit 3 is such that the light source 4 built in the head unit 3 of the video device.
1, 51 and the upper side of the light sources 41, 51, that is, the light source 4
Reflectors 42 and 52, which are mounted on the side opposite to the subject placed on the original table 7 with respect to 1, 1 and 51 and reflect the light emitted from the light sources 41 and 51 toward the subject, and the light source 4.
Diffusing plates 43 and 53 which are mounted on the same axis as 1, 1 and which diffuse light emitted toward a subject, and the diffusing plate 4
Imaging units for illuminating the subject images placed on the document table 7 and illumination units 4 and 5 which are attached to the exit sides of the light sources 3 and 53 and scatter incident light toward the subject and emit the scattered light. And part 6. In the illustrated embodiment of the invention, the light sources 41, 51 are halogen lamps, but the invention is not limited thereto.

The image pickup section 6 is provided between the light sources 41 and 51.
A detachable adapter lens 62 that is arranged in the central portion of the head unit 3 and is used when imaging general paper or the like.
And a zoom lens 61 mounted on the upper surface side of the adapter lens 62 for zooming the applied light of a subject at a set magnification, and a zoom lens 61 mounted on the object side of the adapter lens 62, that is, the document table side and reflected from the subject to enter. And a third polarization filter 63 that blocks the polarized light.

The adapter lens 62 is used by being combined with the image pickup unit 6 when picking up an image of a manuscript sheet. When the object other than the manuscript sheet is picked up, the adapter lens 6 is used.
2 is removed and the subject is imaged using only the zoom lens 61.

The third polarizing filter 63 has a detachable structure and is rotatable about 180 ° so that it can be rotated and used in the direction in which light is reflected and incident. Further, when the subject placed on the document table 7 is general paper whose surface is not coated, the third polarization filter 63 may be removed.

As shown in the figure, the illuminators 4 and 5 have a first illuminator 4 formed on the left side with respect to the image pickup unit 6, and an image pickup unit 6.
The second illuminating section 5 is formed on the right side of the first illuminating section 4, and the first illuminating section 4 and the second illuminating section 5 have the same structure.

Polarizing filter 4 in the embodiment of the present invention
Nos. 4, 54 are not limited to this, and can be configured to have a polarizing film used in a camera between two glasses.

The operation of the image device having the built-in illumination function in the head unit according to the embodiment of the present invention having the above structure will be described as follows. After placing the material 8 necessary for a seminar or the like using the image device on the document table 7 of the image device, the illumination units 4 and 5 are driven to image the material 8 placed on the document table 7. .

By driving the illuminators 4 and 5, a certain amount of light is emitted from the light sources 41 and 51 of the first illuminator 4 and the second illuminator 5, which are mounted on the left and right sides with respect to the image pickup unit 6, respectively. Is irradiated to illuminate the material 8, that is, the subject.

Of the light emitted from the light sources 41 and 51, the light diffused in the rearward direction of the light sources 41 and 51 is the reflection plates 42 and 52.
The light source 41,
The light utilization efficiency of 51 is increased.

The light emitted from the light sources 41 and 51 is diffused to a certain range through the diffusion plates 43 and 53, and then scattered through the polarization filters 44 and 54 to be emitted onto the object placed on the original table 7. .

In general, the intensity of the central light of the light output from the halogen lamp is larger than that of the ambient light, and the intensity of the light applied to the subject is not constant. Therefore, when the subject is reproduced in an image, The brightness of the screen appears relatively brighter than that of the peripheral screen, or a white part appears on the central screen. Therefore, the light emitted from the light sources 41 and 51 passes through the diffusion plates 43 and 53, whereby the central light is diffused, and the diffused light passes through the polarization filters 44 and 54 and is scattered so that the subject is uniformly illuminated. To be done.

As described above, the light emitted from the first illuminating unit 4 and the second illuminating unit 5 mounted on the left and right sides of the image pickup unit 6 is applied to the subject placed on the original table 7, An image having an appropriate illuminance and corresponding to a subject is captured by the image capturing unit 6.

When the above-mentioned subject is a coated paper or a subject having a high reflectance, light which is emitted from the illumination units 4 and 5 or incident from the periphery is reflected on the subject and the image pickup unit 6 is used. The blooming phenomenon that the center part appears white on the screen that is input and reproduced.

In the embodiment of the present invention, when a subject having a high reflectance is placed on the original table 7 as described above, the light reflected by the subject is mounted on the subject side of the adapter lens 62 of the image pickup section 6. It is filtered by the third polarizing filter 63. Further, when the light emitted from the light sources 41 and 51 or ambient light is reflected by the subject and is incident on the imaging unit 6, the light reflected and incident on the subject by the filtering action of the third polarization filter 63 is generated. Be cut off.
At this time, the third polarization filter 63 is rotated in the direction in which the ambient light is diffusely reflected and is incident to efficiently block the diffusely reflected light.

As described above, the light diffusely reflected by the subject is blocked, and the light corresponding to the subject placed on the document table 7 is condensed by the lenses 61 and 62 of the image pickup section 6 and is then collected by the image pickup device (not shown). It is incident.

The image pickup device (not shown) converts the input light of the subject into an appropriate electric signal and outputs it, so that the video signal processing operation is performed accordingly. When general paper other than the coated paper is used, the blooming phenomenon due to diffused reflection does not occur, so the third polarizing filter 63 may be removed and used.

[0027]

As described above, in the video device shown in the embodiment of the present invention, since the illumination device is formed in the head portion for picking up the subject placed on the document table, the video device can be easily downsized. is there. Also, since a removable polarization filter is attached to the light output end to block light that is diffusely reflected, it is possible to supply light of appropriate illuminance to the subject so that the subject image is accurately captured, and there is no blooming phenomenon. It is possible to provide a video device in which a head part having an effect of reproducing a clear image has a built-in illumination function.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional video device,

2 is a perspective view of a video device according to an embodiment of the present invention, FIG.

FIG. 3 is a cross-sectional view of the head portion of the image device according to the embodiment of the present invention.

[Explanation of symbols]

 1 Main body 3 Head section 7 Document table 9 Connecting shaft

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 1/10 H04N 1/10 1/107

Claims (5)

[Claims] 1. A main body; a document table mounted on the body for positioning a subject; a head section; and the head section; An image pickup unit for picking up an image of a subject placed on it, and mounted in the central portion for picking up an image of the subject placed on the platen; and mounted on one side of the image pickup unit in the left-right direction and placed on the platen An illumination unit that supplies a certain amount of light to a subject to be exposed;
An image device having a built-in illumination function in the head portion, which is provided with a connecting shaft that connects the head portion including the imaging unit and the illumination unit to the main body. 2. The illumination unit includes a light source for irradiating a fixed amount of light; a polarization filter mounted on the subject side of the light source for filtering and outputting polarized light emitted from the light source; and a subject for the polarization filter. The image device having a built-in illumination function in the head unit according to claim 1, further comprising: a diffusion plate that is mounted on a side and diffuses light output from the polarization filter to illuminate a subject. 3. The head unit according to claim 1, wherein the illumination unit further includes a reflector mounted on the image side of the light source to reflect light emitted from the light source to a subject. A video device with built-in functions. 4. The zoom lens for picking up a subject image at a set magnification;
An adapter lens that is detachably attached to the subject side of the zoom lens when an image of an original is to be captured; a polarization filter that is detachably attached to the adapter lens and blocks light that is reflected and incident on the subject. An image device having an illumination function built in the head portion according to claim 1, wherein 5. The illuminating unit is mounted on the left side with respect to the image capturing unit and supplies a predetermined amount of light onto a document table; and the illuminating unit is mounted on the right side with respect to the image capturing unit. 2. A video device having a built-in illumination function in the head unit according to claim 1, further comprising: a second illumination unit that supplies a predetermined amount of light onto the document table.