JPH11231371A - Pan and tilt structure for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pan and tilt structure by which a color image is not spectrally split even in the case of moving the image pickup range of a camera up and down and right and left. SOLUTION: This pan and tilt structure camera is equipped with a fixed frame 4 having a variable tilt angle (a) to a CCD 2 and a lens group 3, a lens 1 fixed on the frame 4 and for refracting light, a gear for rotation 5b and a motor for rotation 6b for rotating the frame 4 with the vertical axis of the CCD 2 and the lens group 3 as center, and a gear for tilting (5a) and a motor for tilting 6a for changing the tilt angle of the fixed frame to the CCD and the lens group. In such a case, the image pickup range of the camera is moved up and down and right and left by the motor for rotation and the motor for tilting 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pan-tilt structure of a camera, and more particularly, to a structure in which light is refracted by tilting a lens to move an imaging range of the camera up, down, left and right.

[0002]

2. Description of the Related Art A conventional camera pan-tilt structure has a prism 7 in front of a CCD 2 and a lens group 3 as shown in FIG.
And two prisms 8. Since the prism has a function of refracting light depending on its shape, the arrangement of the prism 7 and the prism 8 in FIG. 4 refracts light in the direction of increasing the thickness of the prism, so that the imaging range is shifted from the center.

FIG. 5 shows a case in which the prism 7 and the prism 8 are rotated by 180 degrees in the direction b in FIG.

FIG. 6 shows a case where only the prism 7 is rotated by 180 degrees as compared with FIG.

[0005]

In the conventional camera pan-tilt structure, two prisms are used. As shown in FIG. 7, light passing through the prism is split by color difference. Therefore, there is a problem that the projected image is also spectrally projected in the color image.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and has as its object to provide a pan-tilt structure in which a color image is not spectrally dispersed even when an imaging range of a camera is moved up, down, left, and right.

[0007]

In order to achieve this object, a camera pan-tilt structure according to the present invention comprises a fixed frame having a variable inclination angle with respect to a CCD and a lens group, and fixed to the fixed frame to refract light. Lens, a rotating gear and a rotating motor for rotating the fixed frame around the vertical axis of the CCD and the lens group, and a tilting gear and a tilting motor for changing the tilt angle of the fixed frame with respect to the CCD and the lens group. And a camera panning / tilting structure comprising: a rotating motor and a tilting motor for moving the imaging range of the camera up, down, left and right.

When the lens is tilted, the imaging range of the camera moves from the center to the end, and by rotating the camera, images in all directions (up, down, left, and right) can be taken.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. The present invention, as shown in FIG. 1, a lens 1 for refracting light, a CCD 2,
It is composed of a lens group 3. The lens 1 is fixed to a fixed frame 4 having a variable tilt angle with respect to the lens group 3, and is configured to rotate 360 degrees around the cb axis by a rotation gear 5b and a rotation motor 6b.

When the imaging range to be taken into the CCD 2 is in front, the lens 1 is driven by the tilt gear 5a and the tilt motor 6a.
Then, the fixed frame 4 is rotated in the direction a with the rotation center ca as an axis, and the inclination angle a of the lens 1 is set to 0 degree (FIG. 3).

If it is desired to move the imaging range to the end, the inclination angle a is increased, and as the lens 1 is tilted,
Is refracted in the direction opposite to the direction in which the lens 1 is directed, and is captured by the CCD 2. Therefore, the imaging range moves in the direction opposite to the direction of the lens 1. Since the lens 1 rotates in the 360-degree b direction, the imaging range can be moved (pan-tilt of the camera) in all directions.

FIG. 2 shows that the lenses 1 and 4 are moved 180 degrees in the direction b.
FIG. 2 is a diagram in which the image capturing range is changed by rotating the image in the opposite direction to that of FIG. 1.

[0013]

As is apparent from the above description, according to the camera pan-tilt structure of the present invention, it is possible to provide a pan-tilt structure in which a color image is not separated even when the imaging range of the camera is moved up, down, left and right. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a camera pan-tilt structure according to the present invention.

FIG. 2 is a diagram in which the imaging range of the camera pan-tilt structure according to the present invention is changed in a direction opposite to that of FIG.

FIG. 3 is a diagram centering an imaging range of a camera pan-tilt structure according to the present invention.

FIG. 4 is a diagram showing a conventional camera pan-tilt structure.

FIG. 5 shows an imaging range of a conventional camera pan-tilt structure in FIG.
Figure changed in the opposite direction.

FIG. 6 is a diagram centering on an imaging range of a conventional camera pan / tilt structure.

FIG. 7 is a spectral diagram of a prism used in a conventional camera pan-tilt structure.

[Explanation of symbols]

 1 ... Lens 2 ... CCD 3 ... Lens group 4 ... Fixed frame 5a ... Tilt gear 5b ... Rotating gear 6a ... Tilt Motor 6b ・ ・ ・ Rotating motor

Claims (1)

[Claims] A fixed frame (4) having a variable tilt angle (a) with respect to a CCD (2) and a lens group (3), and a lens (1) fixed to the fixed frame and refracting light. )When,
A rotation gear (5b) and a rotation motor (6b) for rotating the fixed frame around the vertical axis of the CCD and the lens group, and an inclination gear for changing an inclination angle of the fixed frame with respect to the CCD and the lens group. (5a) A camera pan-tilt structure comprising a tilt motor (6a), wherein the rotation motor and the tilt motor move the imaging range of the camera up, down, left and right.