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KR-102964539-B1 - Pan motion camera blocking irregular reflection of illumination light

KR102964539B1KR 102964539 B1KR102964539 B1KR 102964539B1KR-102964539-B1

Abstract

The present invention relates to a structure for blocking reflected light that is diffusely reflected from a light rotating together with a camera module in a pan motion camera and enters the camera module. The above-described pan motion camera comprises a motor that provides rotational driving force, a rotating member that rotates around a rotation axis according to the rotational driving force, at least one camera module mounted on the rotating member and rotating together with the rotating member, at least one lighting module mounted on the rotating member at a position corresponding to the at least one camera module and rotating together without relative movement with respect to the at least one camera module, and a light-blocking member fixed to one side of a camera housing and blocking light emitted from the lighting module from entering the lens of the camera module without contacting the rotating member.

Inventors

  • 홍길화
  • 김대경
  • 전병문

Assignees

  • 한화비전 주식회사

Dates

Publication Date
20260512
Application Date
20200306

Claims (11)

  1. Motor providing rotational driving force; A rotating member that rotates around a rotation axis according to the above rotational driving force; At least one camera module mounted on the rotating member and rotating together with the rotating member; At least one lighting module mounted on the rotating member at a position corresponding to the at least one camera module, and rotating together without relative movement with respect to the at least one camera module; A camera housing comprising a case for accommodating the rotating member, a lighting cover disposed on the case and surrounding the lighting module, and a light-transmitting cover disposed on the lighting cover and surrounding the camera module; and It includes a light-blocking member that blocks light emitted from the lighting module from entering the lens of the camera module without contacting the rotating member, While the at least one camera module and the at least one lighting module rotate together without moving relative to each other, the light-blocking member is fixed to one side of the camera housing so as not to rotate, and A pan motion camera having a step portion arranged in the rotational radius direction between the light-transmitting cover and the light-emitting cover, wherein the step portion is formed of a material that does not transmit the light.
  2. In paragraph 1, A pan motion camera, wherein the position corresponding to the at least one camera module on which the at least one lighting module is mounted is lower than the camera module and is a position further outward in the rotational radius direction.
  3. In paragraph 1, A pan motion camera, wherein the at least one camera module comprises a plurality of camera modules, and the at least one lighting module comprises a plurality of lighting modules corresponding to the plurality of camera modules.
  4. In paragraph 2, The light-transmitting cover wraps the at least one camera module in a dome shape along the circumferential direction, and The above lighting cover is connected to the bottom of the above light-transmitting cover and wraps around at least one lighting module along the circumferential direction, The above case is connected to the bottom of the lighting cover and accommodates the motor and the rotating member, a fan motion camera.
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  6. In paragraph 1, A pan motion camera in which the rotational radial end of the stepped portion covers at least a portion of the upper part of the lighting cover so that light emitted from at least one lighting module is not irradiated upward toward the light-transmitting cover side.
  7. In claim 1, the light-blocking member is A pan motion camera fixed to the inner lower part of the above-mentioned step portion and protruding downward along the circumferential direction, blocking a first light emitted upward from the lighting module or a second light emitted from the lighting module and reflected upward from the lighting cover from the lighting module from entering the at least one camera module.
  8. In Paragraph 7, The above-mentioned rotating member includes a protrusion that protrudes upward along at least a portion of the circumferential direction, wherein A pan motion camera in which the above-mentioned protrusion is arranged to overlap with the light-blocking member in the rotational radial direction without contacting the light-blocking member so as not to allow the first light or second light to enter the at least one camera module.
  9. In paragraph 8, The above-mentioned protrusion includes a pair of upward ribs, and A pan motion camera in which the above pair of upward ribs are spaced apart in the rotational radial direction so that the light-blocking member is fitted into the above pair of upward ribs without contact.
  10. A fixed assembly configured to support a rotating member of a pan motion camera, comprising: a case; a fixed stage disposed on the case; a lighting cover disposed on the fixed stage; a light-transmitting cover disposed on the lighting cover; and at least one fixed light-blocking member disposed between the lighting cover and the light-transmitting cover to block light directed toward the light-transmitting cover; and A rotating assembly configured to rotate within the fixed assembly, comprising a rotating member connected to a motor, at least one camera mounted on the rotating member, at least one lighting module corresponding to the at least one camera and mounted on the rotating member, and at least one rotating light-blocking member connected to the rotating member and configured to block light reflected from the lighting module from reaching the at least one camera. The above-mentioned rotating assembly rotates around the above-mentioned fixed assembly, and While the at least one camera and the at least one lighting module rotate together without moving relative to each other, the light-blocking member is fixed to one side of the camera housing so as not to rotate, and A pan motion camera having a step portion arranged in the rotational radius direction between the light-transmitting cover and the light-emitting cover, wherein the step portion is formed of a material that does not transmit the light.
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Description

Pan motion camera blocking irregular reflection of illumination light The present invention relates to a pan motion camera that prevents diffuse reflection of lighting light, and more specifically, to a structure that blocks diffusely reflected light entering the camera module from a light source rotating together with the camera module in the pan motion camera. Generally, surveillance cameras incorporate a dome cover to protect the camera module and a lighting module to provide light, so that shooting is possible even in dark places. However, in a PTZ (pan-tilt-zoom) or PTRZ (pan-tilt-rotation-zoom) camera with panning motion, when the camera module and the lighting module rotate together, diffuse reflection occurs due to the light emitted from the lighting module. In particular, this problem of diffuse reflection can be exacerbated when infrared LEDs are used as lighting in infrared cameras. Due to this problem, it is common practice to use fixed infrared LEDs as lighting in conventional PTZ or PTRZ cameras. Generally, a PTZ camera is a camera that provides pan, tilt, and zoom functions, while a PTRZ camera refers to a camera that additionally includes a function to adjust the phase of the captured image by allowing each camera module to self-rotate around its own optical axis. However, due to the characteristics of PTZ or PTRZ cameras, if the lighting module is fixed while the camera module automatically rotates to perform shooting, the field of view captured by the camera module may deviate from the illumination angle of the lighting module at certain locations, causing the captured image to appear dark. Therefore, although it would be advantageous to position the lighting module of a PTZ camera or PTRZ camera so as to rotate (panning) together with the camera module rather than positioning it in a fixed position as described above, there is a difficulty in that diffuse reflection of the lighting light occurs as described above because the lighting module positioned adjacently rotates together with the camera module, and it is also difficult to structurally completely isolate the camera module and the lighting module. FIG. 1a is a perspective view illustrating the external appearance of a pan motion camera according to one embodiment of the present invention. FIG. 1b is a perspective view with the light-transmitting cover removed from FIG. 1a. FIG. 1c is a perspective view showing a rotating assembly with all camera housings removed. FIG. 2a is a transparent perspective view of a pan motion camera (100) showing a camera module and a lighting module placed within a light-transmitting cover and a lighting cover. FIG. 2b is a perspective view with the light-transmitting cover and lighting cover removed from FIG. 2a. FIG. 3a is a cut-away perspective view of the pan motion camera of FIG. 1a cut in the XX' direction. FIG. 3b is an enlarged cross-sectional view of a portion of the above-mentioned cut perspective view. FIG. 4a is an enlarged perspective view of the step portion formed between the light-transmitting cover and the light-emitting cover in FIG. 3a. Figure 4b is a cross-sectional view of Figure 4a. Fig. 5a is a perspective view of the case. Fig. 5b is an exploded perspective view of a pan motion camera. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning that is commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and/or "comprising" do not exclude the presence or addition of one or more other components in addition to the components mentioned. An embodiment of the present invention will be described in detail below with reference to the attached drawings. The present invention basically focuses on mechanically isolating a camera module and a lighting module in a structure in which the camera module and the lighting module