JP5590931B2 - Illuminated surveillance camera device - Google Patents

Description

  In the present invention, for example, when visible light can be taken such as in the daytime, the visible light is taken, and when a sufficient amount of light cannot be obtained such as at night, a wavelength other than visible light can be obtained. The present invention relates to an illuminated surveillance camera apparatus that switches to illumination and performs shooting.

  A conventional surveillance camera device with illumination has a camera and a light projecting means in a transparent or translucent cover. When the camera can shoot with visible light, such as in the daytime, the camera shoots with visible light. Photographing is performed by irradiating light (for example, near infrared rays). Thus, when the periphery of the camera is dark, it is possible to take a picture without being noticed by the person being monitored (see, for example, Patent Document 1).

  In addition, there is an illuminated surveillance camera device in which an infrared light emitting device and an infrared camera are incorporated in a mirror case having a cold mirror and configured to transmit infrared light and reflect visible light as a mirror (see, for example, Patent Document 2). .

Japanese Laid-Open Patent Publication No. 2005-136800 (Page 3, Fig. 1) Japanese Laid-Open Patent Publication No. 2002-316580 (second page, FIGS. 1 and 4)

  However, in the conventional illuminated surveillance camera device disclosed in Patent Document 1, when a transparent dome cover is used, the person being monitored can see the camera when the surroundings are bright, such as in the daytime. . For this reason, there is a problem that the person being monitored feels uncomfortable, or the person who is trying to commit a crime notices the presence of the camera, making it impossible to take a picture of the crime.

  In addition, when a cover such as a cold mirror is used as in the conventional surveillance camera device with illumination disclosed in Patent Document 2, the camera in the cover cannot be seen from the outside. However, when installed in a place where a mirror is not normally arranged, such as a ceiling like a surveillance camera, there is a problem that the reflecting mirror is conspicuous and it may be easy to notice that it is being monitored. Further, since the cold mirror does not transmit visible light but only transmits infrared light, only the infrared camera is used, and there is a problem that color photography cannot be performed in the daytime.

  Moreover, in the conventional surveillance camera device with illumination disclosed in Patent Documents 1 and 2, if the cover is made semitransparent or a half mirror so that the camera is inconspicuous, the camera becomes inconspicuous, but by the built-in light projecting means There is a problem that the light is reduced when the light is transmitted, the subject looks dark, and the photographing range is narrowed. Moreover, in order to improve this, there existed a subject that the enlargement of a light projection means, the increase in power consumption, etc. were needed.

  The present invention has been made in order to solve the above-described problems, and provides a surveillance camera device with illumination that can shoot a wide range without making the camera conspicuous and without dimming light from the light projecting means. It is intended to provide.

An illuminated surveillance camera device according to the present invention includes a light projecting unit that irradiates light having a wavelength other than the wavelength of visible light, and an imaging unit having sensitivity in the wavelength region of visible light and the light irradiated by the light projecting unit; A cover that transmits the visible light and the light irradiated by the light projecting means, has a spectral transmission characteristic in which the transmittance of the light irradiated by the light projecting means is higher than the transmittance of the visible light, and covers the light projecting means and the imaging means; It is equipped with.

  According to the present invention, since it is configured as described above, the camera has an inconspicuous nighttime by providing a cover having a spectral transmission characteristic in which the transmittance of irradiation light by the light projecting means is higher than the transmittance of visible light. The light emitted from the light projecting means is irradiated to the cover almost without being dimmed and can be prevented from becoming dark, and a wide range can be photographed.

It is a disassembled perspective view which shows the structure of the surveillance camera apparatus with illumination which concerns on Embodiment 1 of this invention. It is a graph which shows the sensitivity characteristic of the camera substrate in Embodiment 1 of this invention. It is a graph which shows the spectral transmittance of the dome cover in Embodiment 1 of this invention. It is a disassembled perspective view which shows the structure of the surveillance camera apparatus with illumination which concerns on Embodiment 2 of this invention. It is an external view which shows the inner side of the cover part in Embodiment 2 of this invention. It is an arrangement drawing showing arrangement of an optical system, light projection means, and a cover in Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
1 is an exploded perspective view showing the structure of an illuminated surveillance camera apparatus according to Embodiment 1 of the present invention.
As shown in FIG. 1, the illuminated surveillance camera device includes a base 1 installed on a ceiling, a main body 2 attached to the base 1, and a cover 3 attached to the base 1 so as to cover the main body 2. .

  The main body 2 is mounted with a power supply of a device (not shown), a captured video processing unit, an external communication unit, a movable unit of the imaging device, and the like. The main body 2 supports a camera unit 5 that captures an image of a monitoring area via a support unit 4.

  The support unit 4 supports the camera unit 5 so as to be pivotable in the vertical direction about the shaft 4a, and adjusts the imaging direction of the camera unit 5 by rotating itself by the main body 2 in the horizontal direction. It is.

  The camera unit 5 is attached on the camera substrate 6 and a camera substrate (imaging means) 6 having an imaging element such as a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) for imaging the monitoring area. An optical system 7 including a lens, and a light projecting unit 8 that is disposed around the camera substrate 6 and that irradiates light of a wavelength other than visible light to the imaging range of the camera substrate 6. Consists of

FIG. 2 is a graph showing general sensitivity characteristics of the camera substrate 6 according to Embodiment 1 of the present invention.
As shown in FIG. 2, the camera substrate 6 has sensitivity not only to visible light but also to the near-ultraviolet rays 20 and the near-infrared region 21, and imaging is performed by irradiating light in these wavelength regions by the light projecting means 8. It becomes possible to do. For this reason, for example, near-infrared illumination may be used as the light projecting means 8.

  The cover 3 includes a dome cover 9 made of a translucent member and a housing 10 made of a hard member so that a person being photographed is not noticed. The cover 3 covers the main body 2 and the camera unit 5 and attaches and fixes the housing 10 to the base 1 to protect the internal structure from external interference factors such as dust, mold and insects.

Here, the spectral transmittance of the dome cover 9 will be described.
FIG. 3 is a graph showing an example of spectral transmittance characteristics of the dome cover 9 according to Embodiment 1 of the present invention. FIG. 3 shows a case where near-infrared light is irradiated by the light projecting means 8.
As shown in FIG. 3, in the dome cover 9, the transmittance in the visible light region (approximately 400 nm to 700 nm) 22 is approximately 50% (translucent), and the transmittance in the near infrared region (approximately 700 nm to 1000 nm) 23 is approximately 90%. % Material (transparent) is selected and configured.
In addition to molding the dome cover 9 with a resin material that has been color-tuned to have such characteristics, a filter that reduces only visible light is applied to the dome cover that is made of a material that transmits all of the wavelength region. You may comprise by performing vapor deposition.

  As described above, according to the first embodiment, the transmittance of the dome cover 9 is lowered so that the camera becomes inconspicuous in the visible light wavelength region, and the transmittance is reduced in the wavelength region irradiated by the light projecting means 8. Since the dome cover 9 is made semi-transparent so that the camera is not conspicuous for a person who is monitored in the daytime, no sunlight enters at night, and the light emitted by the light projecting means 8 is used. Even when shooting with only the light, the light is emitted without being dimmed, so that the brightness is insufficient and the shooting range is narrowed, or it is difficult to see the person who shot the camera, making it impossible to monitor sufficiently be able to. Further, as the brightness of light by the light projecting means 8 is improved, it is possible to prevent an increase in the size of the device and an increase in power consumption.

  In addition, although the case where the light projecting unit 8 in the first embodiment is configured by the LED has been described, the present invention is not limited thereto, and the light projecting unit 8 may be configured by a fluorescent lamp, a light bulb, and the like. It is not limited.

  Further, in the cover 3 in the first embodiment, the dome cover 9 and the housing 10 are configured separately, but the dome cover 9 and the housing 10 may be integrally formed, and a portion corresponding to the housing 10 It may be configured to paint only.

Embodiment 2. FIG.
4 is an exploded perspective view showing an illuminated surveillance camera apparatus according to Embodiment 2 of the present invention.
In the illuminated surveillance camera apparatus according to the second embodiment shown in FIG. 4, the same components as those in the illuminated surveillance camera apparatus according to the first embodiment shown in FIG. Omitted.
As shown in FIG. 4, the illuminated surveillance camera device includes a base 11, a main body 2, and a cover 12.
The base 11 is installed on the ceiling, and has a long hole portion 11a for positioning the main body 2 by rotating in the left-right direction.

The main body 2 is held in the base 11 by being installed in a desired direction by the long hole portion 11a and fastened with screws or the like. The main body 2 supports a camera unit 14 that captures an image of a monitoring area via a support unit 13.
The support unit 13 adjusts the imaging direction of the camera unit 14 by supporting the camera unit 14 so as to be rotatable in the vertical direction about the shaft 13 a of the support unit 13.

The camera unit 14 includes a camera substrate 6, an optical system 7 including a lens, and a light projecting unit 8 provided on the left and right of the lens, and a cushion 15 that is a component of the optical system 7.
The cushion 15 is disposed around the lens and is in close contact with the cover 12 to prevent light from the light projecting means 8 from being reflected by the cover 12 and entering the lens.

  The cover 12 includes a front cover 16 made of a translucent hard member that cannot be noticed by a person being photographed, and a housing 17 made of a hard member. The cover 12 covers the main body 2 and the camera unit 14 and attaches and fixes the housing 17 to the base 11 to protect the internal structure from external interference factors such as dust, mold, and insects.

  As shown in FIGS. 5 and 6, the front cover 16 includes a thick portion 18 in which a portion where the cushion 15 rotates (the imaging surface side of the camera substrate 6) is formed thick, and a light projecting unit 8. A portion through which light passes (irradiation surface side of the light projecting means 8) is composed of a thin portion 19 configured to be thinner than the thick portion 18.

  As described above, according to the second embodiment, the thickness of the imaging surface side of the front cover 16 by the camera substrate 6, that is, the transmittance is reduced, and the irradiation surface side by the light projecting means 8 is reduced in thickness, that is, the transmittance. Since it is configured to be high, the person being monitored does not notice that it is being filmed. Further, since it is possible to reduce the light from the light projecting means 8 from being dimmed by the front cover 16, it is possible to perform sufficient monitoring because the brightness is insufficient and the photographing range becomes narrow, or the photographed person becomes difficult to see. Can be prevented. Further, as the brightness of light by the light projecting means 8 is improved, it is possible to prevent an increase in the size of the device and an increase in power consumption.

  DESCRIPTION OF SYMBOLS 1 Base, 2 main body, 3 cover, 4 support part, 4a axis | shaft, 5 camera part, 6 camera board (imaging means), 7 optical system, 8 light projection means, 9 dome cover, 10 housing | casing, 11 base, 11a length Hole part, 12 cover, 13 support part, 13a shaft, 14 camera part, 15 cushion, 16 front cover, 17 housing, 18 thick part, 19 thin part.

Claims (2)

A light projecting means for irradiating light having a wavelength other than that of visible light;
Imaging means having sensitivity in the wavelength region of the light irradiated by the visible light and the light projecting means;
Transmitting the visible light and the light irradiated by the light projecting means, and having a spectral transmission characteristic in which the transmittance of the light irradiated by the light projecting means is higher than the transmittance of the visible light, the light projecting means and the imaging An illuminated surveillance camera device comprising a cover covering the means. A light projecting means for irradiating light having a wavelength other than that of visible light;
Imaging means having sensitivity in the wavelength region of the light irradiated by the visible light and the light projecting means;
An illuminated surveillance camera device comprising: an irradiation surface side of the light projecting unit that is thinner than an image capturing surface side of the image capturing unit; and a cover that covers the light projecting unit and the image capturing unit.

Images