JPH04364670A - Video camera equipment - Google Patents

Abstract

PURPOSE:To attain accurate image pickup by correcting an optical axis KG of a lens section and an optical axis VG of a view finder so as to align them. CONSTITUTION:An opening 10 is provided so that its center is coincident with a center of an optical axis VG of a view finder 5 and an optical axis correction section 3 provided with 1st and 2nd reflecting mirrors 6, 7 to reflect an image pickup light made incident from the opening 10 to be led to the above lens section 2 is provided to the lens section 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera apparatus that captures an image of a subject using a solid-state image pickup device using, for example, a CCD (charge coupled device).

0002

[Prior Art] Conventional, for example, CCD (charge coupled device)
FIG. 3 shows a video camera device that captures an image of a subject using a solid-state image pickup device. The video camera device shown in FIG. 3 includes a camera body 50, a lens section 51 provided on the camera body 50, and a viewfinder 53. The camera body 50 includes a CCD as an imaging section.
52, and the lens portion 51 is attached so that the center of the light receiving surface of the CCD 52 and the center of the lens portion 51 coincide with each other. In addition, the camera body 2
is provided with a shoulder rest 54 for supporting the camera body 2 during imaging. When taking an image, the user fixes the video camera apparatus by placing the shoulder rest 54 on the shoulder and holding the video camera apparatus with the right hand, for example, to take an image. Therefore, the mounting positions of the lens section 51 and the viewfinder 53 for recognizing the captured image are determined according to calculations based on human optics. That is, since the lens portion 51 has a considerable weight, it is provided in front of the camera body 50 and slightly below the camera body 50 in consideration of the balance during image pickup. Further, the viewfinder 53 is located slightly above the mounting position of the lens unit 51 and at the eye level of the user when the video camera device is fixed by placing the shoulder rest 54 on the shoulder during the image capturing. It is placed in such a position. For example, the user images a subject while looking at the viewfinder 53 with his right eye and recognizing the captured image, while observing the surroundings of the subject with his left eye and searching for the next subject to image while capturing the image. .

0003

[Problem to be Solved by the Invention] However, at the time of image capture, the image of the object recognized by the right eye of the user through the viewfinder 53 is an image on the optical axis KG of the lens section 51 shown in FIG. On the other hand, the object actually recognized by the user's left eye at this time is at the same height as the optical axis VG of the viewfinder 53. For this reason, a positional deviation A occurs between the image of the object recognized by the right eye through the viewfinder 53 during image capture and the object actually recognized by the left eye, and the next object is positioned at the center of the display screen. Accurate imaging was hindered, as it took time to capture the object.

[0004] In order to avoid the above-mentioned inconvenience, as shown in FIG. It is conceivable to provide the lens section 51 slightly above the camera body 50 so that VG and the optical axis KG of the lens section 51 coincide. However, as described above, the lens section 51, viewfinder 53, etc. are provided at ergonomically calculated positions, and as shown in FIG. If the optical axes KG and VG of the video camera device are made to coincide with each other, the center of gravity of the video camera device as a whole will be raised, resulting in a very unstable state, which will impede the imaging itself.

The present invention has been made in view of the above-mentioned problems, and allows the optical axis of the lens section to be aligned with the viewfinder without changing the positions of the lens section and the viewfinder, which are calculated and provided based on ergonomics. The purpose of the present invention is to provide a video camera device that can align the optical axis.

[0006]

[Means for Solving the Problems] The present invention provides a video camera device in which the optical axis of an imaging optical system that takes an image of a subject and the optical axis of a viewfinder that looks into the subject are offset. The above-mentioned problem is solved by having an optical axis correction means for correcting the optical axis so that it coincides with the optical axis of the viewfinder.

[0007]

[Operation] In the video camera device according to the present invention, the optical axis correction means corrects the optical axis of the imaging optical system so that it coincides with the optical axis of the viewfinder.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a video camera apparatus according to the present invention will be described with reference to the drawings. First, a video camera device according to a first embodiment of the present invention will be explained. As shown in FIG. 1, the video camera device according to the first embodiment includes a camera body 1 and an optical axis correction section 3, which is an optical axis correction means integrally formed with a lens section 2 provided on the camera body 1. It consists of a viewfinder 5. The camera body 1 is provided with a shoulder rest 9, which is a recessed part provided to stabilize the video camera device when placed on a person's shoulder. Hold the video camera device with your right hand to fix the video camera device and take an image. Therefore, the mounting position of the lens section 2 and the viewfinder 5 are calculated and determined based on ergonomics, taking into consideration the weight and operability of the camera body 1, the lens section 2, etc. That is, the viewfinder 5 is located at the eye level of the user when the video camera device is fixed by placing the shoulder rest 9 on the shoulder and holding the video camera device with the right hand during imaging. It is provided on the side surface of the camera body 1, etc., as shown in FIG. Furthermore, since the lens section 2 has a considerable weight, it is provided at a position slightly lower than the viewfinder 5 and in front of the camera body 1 in consideration of balance during image capturing. The camera body 1 includes a CCD (solid-state image sensor) 4 that receives imaging light incident through the lens section 2.
and the centers of the lens portions 2 are arranged to coincide with each other.

The optical axis correction unit 3 integrally molded with the lens unit 2 is a box-shaped lens barrel, and for example, one circular opening 10 is located at the center of the opening 10. and the optical axis of the viewfinder 5 coincide with each other. Note that the optical axis correction section 3
In order to prevent light from entering from any direction other than 0, the portion other than the opening 10 is formed of an opaque material that does not allow light to pass through. Further, a transparent plate glass 8 is provided in the opening 10 to prevent dust and the like from entering the optical axis correction section 3. Further, in the optical axis correction section 3, a first reflecting mirror 6 is provided.
and a second reflecting mirror 7 are provided. The first reflecting mirror 6 reflects the imaging light incident through the plate glass 8 onto the second reflecting mirror 7; provided so as to reflect the imaging light reflected by the mirror 6 onto the lens section 2, and
It is provided so as to guide the incident light on the optical axis KG of the lens section 2 to the optical axis KG of the lens section 2.

As described above, the video camera device of the first embodiment provided with the optical axis correction section 3 is used as follows. First, the user places the shoulder rest 9 provided on the camera body 1 on his shoulder and holds the camera body 1 with his right hand to fix it. In this state, viewfinder 5
will be located exactly at the user's right eye level. Next, the user turns on an imaging switch (not shown) to start imaging. Upon the start of this imaging, imaging light enters through the plate glass 8 provided in the optical axis correction section 3 . The imaging light incident through the plate glass 8 is sequentially reflected by a first reflecting mirror 6 and a second reflecting mirror 7 provided in the optical axis correction section 3, and is directed to the CCD 4 via the lens section 2. It is incident. The CCD 4 receives the imaging light incident through the lens section 2, converts the received imaging light into an electrical signal, and supplies it as a video signal to a video signal processing system (not shown). The above video signal processing system is
The video signal supplied from the CCD 4 is processed and supplied as video data, for example, to the viewfinder 5 and a video data recording system (not shown). The viewfinder 5 is provided with a display section such as a monitor device, and displays the video data supplied from the signal processing system. While recognizing the image displayed on the viewfinder 5 with the right eye, the user observes the surroundings of the subject with the left eye and takes an image while considering the subject to be imaged next.

Here, as described above, the aperture 10 of the optical axis correction section 3 is provided so that its center coincides with the optical axis of the viewfinder 5, and the The reflecting mirrors 6 and 7 are provided so as to guide the imaging light incident from the opening 10 to the lens section 2. Therefore, the optical axis KG of the lens section 2 is corrected to match the optical axis VG of the viewfinder 5. This prevents the image of the object that the user recognizes with his right eye through the viewfinder 5 from being misaligned with the object that he actually recognizes with his left eye during image pickup, allowing accurate image pickup. Furthermore, since the above correction can be performed without shifting the mounting positions of the lens section 2 and the viewfinder 5, which are calculated and provided based on the human optics, it is possible to perform imaging without impairing the stability during imaging. Can be done.

As is clear from the above explanation, the first
In the video camera device according to the embodiment, an optical axis correction unit 3 having an opening 10 whose center coincides with the optical axis VG of the viewfinder 5 is integrally molded with the lens unit 2, and the opening 10 is integrally formed with the lens unit 2. By providing the first and second reflecting mirrors 6 and 7 to reflect the imaging light incident from the lens unit 2 and guide it to the lens unit 2, the optical axis KG of the lens unit 2 is aligned with the optical axis of the viewfinder 5. Accurate imaging can be performed by correcting to match VG. Furthermore, since the above correction can be performed without shifting the mounting positions of the lens section 2 and the viewfinder 5, which are calculated and provided based on the human optics, it is possible to perform imaging without impairing the stability during imaging. Can be done.

Next, a video camera device according to a second embodiment of the present invention will be explained. In the video camera device of the first embodiment described above, the optical axis correction section 3 and the lens section 2 are integrally molded, but in the video camera device of this second embodiment, the optical axis correction section is integrally formed. A part that is manufactured separately from the lens part, is removable from the lens part provided in the video camera device, and has an entrance port for imaging light so that it corresponds to the mounting position of the viewfinder. is made flexible.

The video camera device of this second embodiment has the following features:
As shown in FIG. 2, it consists of a camera body 21, a lens section 22 provided on the camera body 21, an optical axis correction section 23, and a viewfinder 25. The camera body 21 has a shoulder rest 29 similar to the camera body 1 of the first embodiment.
is provided at a position that is at the level of the user's right eye when capturing an image by placing the shoulder rest 29 on the shoulder and holding the video camera device with the right hand to fix the video camera device and capture an image. A viewfinder 25 is provided. Further, a lens portion 22 is provided at a position slightly below the position where the viewfinder 5 is provided. Furthermore, a CCD 24 that receives the incident imaging light,
The center of the CCD 24 and the center of the lens section 22 are arranged to coincide with each other. As described above, the mounting position of the lens section 22 and the mounting position of the viewfinder 25 are the same as those of the camera body 21 and the lens section 22.
It is calculated and determined based on ergonomics, taking into account the weight and operability (position of the viewfinder 5, etc.).

The optical axis correcting section 23 is constructed by fitting an optical axis correcting upper part 23a formed in a box shape and an optical axis correcting lower part 23b also formed in a box shape in a telescopic manner. A transparent plate glass 28 is provided in the optical axis correction upper part 23a.
is provided so that the center of the glass plate 28 and the optical axis VG of the viewfinder 5 coincide with each other. The optical axis correction lower part 23b is provided with an opening 31 whose inner diameter is approximately the same as the outer shape of the lens portion 22. The optical axis correction section 23 is formed by fitting the optical axis correction upper section 23a and the optical axis correction lower section 23b, and the opening 31 provided in the optical axis correction section 23 is attached to the lens section 22. In order to prevent light other than the imaging light from entering through the plate glass 28 when
The portion other than the plate glass 28 is made of an opaque member that does not allow light to pass through. Further, a first reflecting mirror 26 is provided in the optical axis correcting upper part 23a, and a second reflecting mirror 27 is provided in the optical axis correcting lower part 23b. The first reflecting mirror 26 is configured to reflect the imaging light incident through the plate glass 28 onto a second reflecting mirror 27 provided in the optical axis correction lower part 23b. Reflector 27
is provided to reflect the imaging light reflected by the first reflecting mirror 26 onto the lens section 22, and each of the reflecting mirrors 26 and 27 reflects the incident light on the optical axis KG of the lens section 22. It is provided so as to lead to the optical axis KG of the lens portion 2.

As described above, the video camera device of the second embodiment provided with the optical axis correction section 23 is used as follows. First, the user first selects the shoulder rest 29 provided on the camera body 21, similar to the explanation of the first embodiment above.
Place the camera body 21 on your shoulder and hold the camera body 21 in place with your right hand. Imaging is then started by turning on an imaging switch (not shown). With the start of this imaging, imaging light enters through the plate glass 28 provided in the optical axis correction upper part 23. The imaging light incident through the plate glass 28 is sequentially passed through a first reflecting mirror 6 provided in the optical axis correction upper part 23a and a second reflecting mirror 27 provided in the optical axis correction lower part 23b. The light is reflected and enters the CCD 24 via the lens section 22. Above C
The CD 24 receives the imaging light incident through the lens section 22, converts the received imaging light into an electrical signal, and supplies it as a video signal to a video signal processing system (not shown). The video signal processing system processes the video signal supplied from the CCD 4 and supplies it as video data to the display section of the viewfinder 25, a video data recording system (not shown), and the like. The user uses this viewfinder 2
While recognizing the image displayed in 5 with the right eye, the user observes the surroundings of the subject with the left eye and takes an image while considering the subject to be imaged next.

Here, as described above, the optical axis correction section 23
are the optical axis correction upper part 23a and the optical axis correction lower part 23.
By fitting and forming b, it is expandable and contractible. Therefore, as described above, the optical axis correction section 23 is attached to the lens section 22, and the optical axis correction section 23 is expanded and contracted so that the optical axis VG of the viewfinder 25 and the center of the aperture 30 coincide with each other. By adjusting the optical axis KG of the lens section 22 to the optical axis V of the viewfinder 25,
It is corrected to match G. As a result, similarly to the first embodiment described above, the image of the object that the user recognizes with his right eye through the viewfinder 25 during image capture and the object that he actually recognizes with his left eye do not deviate from each other, and the image is accurately captured. It is possible to perform accurate imaging. In addition, since the above correction can be performed without shifting the mounting positions of the lens section 22 and viewfinder 25, which are calculated and provided based on the human optics, it is possible to perform imaging without impairing the stability during imaging. Can be done. Further, the optical axis correction upper part 23a and the optical axis correction lower part 23b are telescopically fitted, and by this expansion and contraction, the viewfinder 2
The viewfinder 2 can be adjusted so that the optical axis VG of the viewfinder 2 coincides with the center of the aperture 30.
Regardless of the position where 5 is provided, the lens portion 22
The optical axis KG of the viewfinder 25 can be corrected to match the optical axis VG of the viewfinder 25.

As is clear from the above explanation, the second
The video camera device according to the embodiment includes an optical axis correction upper part 23a provided with an opening 30 through which imaging light enters, and a lens part 2.
The optical axis correction section 23 is formed by telescopically fitting the optical axis correction lower part 23b provided with the opening 22 that fits into the optical axis correction upper part 23a and the optical axis correction lower part 23b. First and second reflecting mirrors 26 respectively reflect the imaging light incident from the opening 30 and guide it to the lens section 22.
, 27, it is possible to expand and contract the optical axis correction section 23 and align the center of the opening 30 with the optical axis VG of the viewfinder 25, regardless of the mounting position of the viewfinder 25. can. Therefore, during the imaging, the image of the object that the user recognizes with his right eye through the viewfinder 25 and the object that he actually recognizes with his left eye do not deviate from each other, and accurate imaging can be performed. In addition, since the above correction can be performed without shifting the mounting positions of the lens section 22 and viewfinder 25, which are calculated and provided based on the human optics, it is possible to perform imaging without impairing the stability during imaging. Can be done. Further, the optical axis correction upper part 23a and the optical axis correction lower part 23b are telescopically fitted, and by this expansion and contraction, the optical axis VG of the viewfinder 25 and the center of the opening 30 are aligned. Since it can be adjusted, it is possible to perform correction to make the optical axis KG of the lens section 22 coincide with the optical axis VG of the viewfinder 25 regardless of the position where the viewfinder 25 is provided.

[0019]

Effects of the Invention The video camera device according to the present invention is a video camera device in which the optical axis of the imaging optical system that takes an image of a subject and the optical axis of the viewfinder that looks into the subject are offset. By providing an optical axis correction means for correcting the optical axis of the viewfinder to match the optical axis of the viewfinder, it is possible to prevent an adverse effect during imaging due to misalignment of the optical axis of the viewfinder and the optical axis of the camera lens, and to accurately identify the subject. Can be filmed. In addition, as an example effect,
By making the optical axis correction means telescopic, the optical axis of the camera lens can be corrected regardless of the mounting position of the viewfinder.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a video camera device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a video camera device according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram of a conventional video camera device in which the optical axis of a viewfinder and the optical axis of a lens section are misaligned.

FIG. 4 is a schematic diagram of a video camera device in which a lens portion is provided above the camera body so that the optical axis of the lens portion and the optical axis of a viewfinder are aligned.

[Explanation of symbols]

1, 21... Camera body 2, 22...
...... Lens section 3, 23 ......
-Optical axis correction section 23a......Optical axis correction upper part 23b......Optical axis correction lower part 4, 24
・・・・・・・・・・・・CCD 5,25・・・・・・・・・Viewfinder 6,2
6...First reflecting mirror 7, 27...
...Second reflecting mirror 8, 28...
・Glass plate 9, 29...Shoulder rest part 10
, 30, 31...opening

Claims (1)

[Claims] Claim 1: In a video camera device in which the optical axis of an imaging optical system that images a subject and the optical axis of a viewfinder that looks into the subject are offset, the optical axis of the imaging optical system is aligned with the optical axis of the viewfinder. What is claimed is: 1. A video camera device comprising an optical axis correction means for correcting the optical axis.