JP2007017182A - Optical sensor and security system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical sensor capable of effectively and planarly monitoring a region to be monitored and provide a security system using the same. <P>SOLUTION: The optical sensor comprises a line 10 for monitoring; an imaging part 11 arranged in such a way as to directly or reflectively image the line 10 for monitoring; and a data processing part 13 for processing image data of the line for monitoring acquired by the imaging part 11 and determining the presence or absence of defects I' of an image I of the line 10 for monitoring. The space acquired by directly or reflectively and optically linking the contour of the line 10 for monitoring and the imaging part 11 is a sensor region 12. The data processing part 13 senses the presence or absence of a light shielding body 20 in the sensor region 12 on the basis of the presence or absence of defects of the image of the line 10 for monitoring in the optical sensor. The security system monitors the presence or absence of intruders into the region to be monitored through the use of the optical sensor and performs a prescribed reporting operation in the case that an intruder has intruded. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical sensor and a security system using the same, and more particularly to an optical sensor using light from a light source such as a light emitting diode or a semiconductor laser and a security system using the same.

In a security system for detecting an intruder intrusion into a monitoring area, a sensor for detecting an intruder is used.
As the above-mentioned sensor, for example, a sensor using an optical system such as light or a sensor that detects opening / closing of a door by an electromagnetic device or the like is known.

Patent Document 1 describes a detection sensor that radiates infrared rays, detects reflected light, and detects the entrance and exit of a person, and a security system using the same.
Further, Patent Document 2 describes a security system using an infrared sensor that detects a sudden change in infrared radiation level caused by a warm body.

However, in the conventional optical sensor described above, it is difficult to effectively monitor the area to be monitored, such as a part or all of the entrance / exit of a building, or a predetermined area near the keyhole of the door. .
JP-A-5-298563 JP-A-10-124762

  The problem to be solved by the present invention is that it is difficult to effectively monitor the area to be monitored.

  In order to solve the above-described problems, an optical sensor according to the present invention includes a monitoring line, an imaging unit arranged to directly or reflect the monitoring line, and the monitoring imaged by the imaging unit. A data processing unit that processes image data of the monitoring line and determines whether or not the image of the monitoring line is missing, and optically reflects the outline of the monitoring line and the imaging unit directly or by reflection. The space obtained by the connection is set as a sensor area, and the data processing unit detects the presence or absence of a light shielding body in the sensor area based on the presence or absence of an image of the monitoring line.

In the optical sensor of the present invention, preferably, the monitoring line emits light.
Alternatively, preferably, a mirror is provided in an imaging range of the imaging unit, and the imaging unit captures a reflection image of the monitoring line by the mirror.
More preferably, the mirror has a first reflecting surface and a second reflecting surface arranged so as to form an angle of 90 °, and the light incident on the first reflecting surface is incident on the second reflecting surface. It is the structure which radiate | emits from a reflective surface.
Preferably, a plurality of the monitoring lines and the imaging units are provided, and a plurality of the sensor areas are configured.

  In order to solve the above-mentioned problem, the security system of the present invention uses an optical sensor to monitor the presence or absence of an intruder into a monitoring area, and performs a predetermined notification operation when an intruder enters The optical sensor includes a monitoring line, an imaging unit arranged so as to capture an image directly or reflecting the monitoring line, and image data of the monitoring line captured by the imaging unit. A data processing unit that processes and determines whether or not the image of the monitoring line is missing, and a space obtained by optically connecting the outline of the monitoring line and the imaging unit directly or by reflection In the monitoring area, the data processing unit senses the presence or absence of a light shield in the monitoring area based on the presence or absence of an image of the monitoring line.

In the above-described security system of the present invention, preferably, in the optical sensor, the monitoring line emits light.
Alternatively, preferably, in the optical sensor, a mirror is provided in an imaging range of the imaging unit, and the imaging unit captures a reflection image of the monitoring line by the mirror.
More preferably, in the optical sensor, the mirror has a first reflecting surface and a second reflecting surface arranged so as to form an angle of 90 °, and light incident on the first reflecting surface. Is emitted from the second reflecting surface.
Preferably, the optical sensor includes a plurality of the monitoring lines and the imaging units, and a plurality of the monitoring areas are configured.

  According to the optical sensor of the present invention, a space obtained by optically connecting the outline of the monitoring line and the imaging unit directly or by reflection can be used as a sensor region, and the long side of the outline of the monitoring line It is possible to effectively monitor the area connecting the imaging units.

  Further, according to the security system of the present invention, in the security system that monitors the presence or absence of an intruder into the monitoring area using an optical sensor and performs a predetermined notification operation when an intruder enters, as an optical sensor, The space obtained by optically connecting the outline of the monitoring line and the imaging part directly or by reflection can be used as the monitoring area, and the area connecting the long side of the outline of the monitoring line and the imaging part is effective on the surface. Can be monitored.

  Hereinafter, an optical sensor according to an embodiment of the present invention and a security system using the same will be described with reference to the drawings.

First Embodiment FIG. 1A is a schematic diagram showing a configuration of an optical sensor according to the present embodiment.
The monitoring line 10 is processed by processing image data of the monitoring line 10 captured by the imaging unit C and the imaging unit 11 arranged to capture the monitoring line 10 directly or by reflection. And a data processing unit 13 for determining whether or not the image I is missing.
Here, a space obtained by optically connecting the outline of the monitoring line 10 and the imaging unit 11 directly or by reflection is the sensor region 12.
The data processing unit 13 senses the presence or absence of a light shield in the sensor region 12 based on the presence or absence of the image I on the monitoring line 10.

FIG. 1B is a schematic diagram for explaining the operation of the optical sensor according to the present embodiment.
If the light shield 20 is present in the sensor region 12, the shadow of the light shield 20 is reflected in the image I of the monitoring line 10, and a lack I ′ occurs in the image I of the monitoring line 10.
The data processing unit 13 detects the presence or absence of the image I on the monitoring line 10 by comparing the image without the defect with the current image, thereby sensing the presence or absence of the light shielding body 20 in the sensor region R.
As described above, the space obtained by optically connecting the outline of the monitoring line 10 and the imaging unit 11 directly or by reflection can be used as the sensor region 12, and the long side of the outline of the monitoring line 10 The area connecting the imaging units 11 can be effectively monitored on the surface.

FIG. 2 shows the configuration of the optical sensor when the sensor region 12 configured in a flat surface shape in the region connecting the long side of the outline of the monitoring line 10 and the imaging unit 11 is viewed from the side surface in the thickness direction of the flat surface. It is a schematic diagram shown.
The short side (width) of the outline of the monitoring line 10 is the maximum thickness of the sensor region 12. The thickness of the sensor region 12 is the average thickness t _{ave at} the center of the monitoring line 10 and the imaging unit 11, and the value is about half the short side (width) of the contour of the monitoring line 10.
For example, when the short side (width) of the outline of the monitoring line 10 is 10 mm, the average thickness t _ave of the sensor region 12 is about 5 mm.

In the optical sensor of the present invention, it is preferable that the monitoring line 10 emits light.
For example, it can be set as the monitoring line which light-emits by arranging an illuminating device in a line form, For example, a sensor can be operated effectively also in dark places, such as the outdoors at night.
In addition, when used in a bright place, the sensor can be operated using external light, so the monitoring line can be used without emitting light.

In the optical sensor having the configuration shown in FIG. 1A, the sensor region R is configured to be a flat surface in a region connecting the long side of the outline of the monitoring line 10 and the imaging unit 11. Is a substantially triangular region.
On the other hand, for example, when there are a plurality of monitoring lines and a plurality of image pickup units and a plurality of sensor areas are configured, it becomes easy to make the shape of the sensor area as a whole by combining a plurality of sensor areas into a rectangular shape. When the sensor is used in an actual system, it is preferable because application and handling of the optical sensor become easy.

FIG. 3 is a schematic diagram illustrating an example of a configuration in which a sensor region is rectangular by combining a plurality of optical sensors in the present embodiment.
In the example shown in FIG. 3, the first monitoring line 10a and the second monitoring line 10b are arranged so as to form two opposing sides of a rectangular shape, and the first monitoring line 10b is arranged at one end of the second monitoring line 10b. A first imaging unit 11a is provided to directly image the monitoring line 10a, and a second imaging unit 11b is provided to directly image the first monitoring line 10a at the other end of the second monitoring line 10b. It has been.
A third imaging unit 11c is provided so as to directly image the second monitoring line 10b in the vicinity of the middle point in the long side direction of the first monitoring line 10a.

In the above arrangement, a substantially triangular area between the first monitoring line 10a and the first imaging unit 11a becomes the first sensor area 12a, and similarly, the first monitoring line 10a and the second imaging unit 11b. A substantially triangular region therebetween is the second sensor region 12b.
On the other hand, a substantially triangular area between the second monitoring line 10b and the third imaging unit 11c is a third sensor area 12c.
When all of the first sensor region 12a, the second sensor region 12b, and the third sensor region 12c are combined, a rectangle that substantially forms two sides on which the first monitoring line 10a and the second monitoring line 10b face each other. A shaped surface can be constructed.

FIG. 4 is a schematic diagram illustrating an example of a configuration in which a sensor region is rectangular by combining a plurality of optical sensors in the present embodiment.
In the example shown in FIG. 4, the first monitoring line 10a and the second monitoring line 10b are arranged so as to form two opposing sides of a rectangular shape, and the first monitoring line 10b is arranged at one end of the second monitoring line 10b. A first imaging unit 11a is provided so as to directly image the monitoring line 10a.
In addition, the second imaging unit 11b is provided so that the second monitoring line 10b is directly imaged at the other end of the first monitoring line 10a on the side opposite to the side where the first imaging unit 11a is provided. .

In the above arrangement, the substantially triangular area between the first monitoring line 10a and the first imaging unit 11a becomes the first sensor area 12a, while the area between the second monitoring line 10b and the second imaging unit 11b. The substantially triangular area becomes the second sensor area 12b.
Combining the first sensor region 12a and the second sensor region 12b substantially constitutes a rectangular surface that forms two opposite sides of the first monitoring line 10a and the second monitoring line 10b. Can do.

It is also preferable that a mirror is provided in the imaging range of the imaging unit, and the imaging unit captures a reflection image of the monitoring line by the mirror. Also in this case, a rectangular surface can be formed as the sensor region.
FIG. 5A is a schematic diagram showing the configuration of the optical sensor when a rectangular flat surface as a sensor region is viewed from the side surface in the thickness direction when the mirror is arranged as described above. FIG. 5B is a schematic diagram showing the configuration of the optical sensor when a rectangular flat surface as a sensor region is viewed from the front.

  The monitoring line 10 and the mirror 14 are arranged so as to form two opposite sides of the rectangular shape, and a first reflection image of the monitoring line 10 by the mirror 14 is captured at one end of the monitoring line 10. An imaging unit 11 a is provided, and a second imaging unit 11 b is provided at the other end of the monitoring line 10 so as to capture a reflected image of the monitoring line 10 by the mirror 14.

FIG. 5C is a schematic diagram when the first imaging unit 11 a and the second imaging unit 11 b are capturing a virtual image F by the mirror 14.
In the above arrangement, a substantially triangular area between the virtual image F and the first imaging unit 11a is the first sensor area 12a, while a substantially triangular area between the virtual image F and the second imaging unit 11b is the second. It becomes the sensor region 12b.
Actually, since the optical system is bent 180 ° at the mirror 14, the first sensor region 12a and the second sensor region 12b are also bent at the mirror 14. As a result, as shown in FIG. As shown in the figure, the bent first sensor region 12a and second sensor region 12b can form a rectangular surface that forms two sides on which the monitoring line and the mirror face each other.

The mirror used in the above has a first reflecting surface and a second reflecting surface arranged so as to form an angle of 90 °, and emits light incident on the first reflecting surface from the second reflecting surface. A configuration is preferred.
The mirror that combines the above two mirrors is projected on a plane perpendicular to the two reflecting surfaces, and taking into account the incidence and reflection of light, the direction opposite to the incident direction regardless of the accuracy of the mirror orientation. Thus, the light can be emitted so as to return to, and the optical system can be easily configured.

FIG. 6A is a schematic configuration diagram of an example that realizes the configuration of the mirror described above.
The first mirror 14a serving as the first reflecting surface and the second mirror 14b serving as the second reflecting surface are integrated so as to form an angle of 90 ° with the reflecting surface facing inward. The light incident on the first reflecting surface is reflected to the second reflecting surface, is further reflected on the second reflecting surface, and is emitted so as to return in the direction opposite to the incident direction on the first reflecting surface. The In addition, the light incident on the second reflecting surface is also reflected to the first reflecting surface, is further reflected on the first reflecting surface, and returns in a direction opposite to the incident direction on the second reflecting surface. Is emitted as follows.

FIG. 6B is a schematic configuration diagram of an example of a prism having the same function as the above-described mirror.
Two orthogonal sides of a triangular prism having an isosceles triangle section function as a first mirror 14a serving as a first reflecting surface and a second mirror 14b serving as a second reflecting surface, respectively. ) Mirrors.

  According to the optical sensor of the present embodiment, a space obtained by optically connecting the outline of the monitoring line and the imaging unit directly or by reflection can be used as the sensor region, and the length of the outline of the monitoring line can be obtained. It is possible to effectively monitor the area connecting the side and the imaging unit on the surface.

(Example)
FIG. 7A is a schematic diagram specifically showing the configuration of the optical sensor of the present embodiment using the mirrors of FIGS. 6A and 6B.
The monitoring line 10 has a length of 5 m and a width of 10 mm, the interval between the monitoring line 10 and the mirror 14 is 10 m, and the image of the monitoring line 10 reflected by the mirror 14 at one end and the other end of the monitoring line 10. The first image pickup unit 11a and the second image pickup unit 11b for picking up images are arranged.

Each of the first imaging unit 11a and the second imaging unit 11b is a CCD imaging device in which 640 × 480 pixels each having a size of 5.6 μm × 5.6 μm are arranged in an effective area, and the actual size of the effective area is vertical. V = 2.688 mm and width H = 3.584 mm.
FIGS. 7B and 7C are schematic diagrams illustrating examples of images obtained by the first imaging unit 11a and the second imaging unit 11b, respectively.
On the above-described CCD image sensor, setting is made so that the image of the monitoring line is projected so as to have a length of V / 3 in the vertical direction. That is, V / 3 = 0.896 mm = 160 pixels. At this time, if calculated at the same ratio, the width direction of the image of the monitoring line is 0.32 pixels. The lack of image can be identified by the resolution as described above.
In the above, in order to enable more detailed detection of image defects, the pixel integration degree of the imaging unit used, the focal length of the lens, etc. are adjusted so that the width direction of the image of the monitoring line is 1 pixel or more can do.

  Further, since the distance from the monitoring line L to the virtual image F is 20 m and an image of 5 m in length 20 m ahead is formed to 0.896 mm, the magnification of the lens incorporated in the CCD image sensor is 0.896 / 5000. = About 1/5580 (5580 times at the opposite magnification), and the focal length f of this lens is f = sm / (m + 1) (s is the object distance: 20 m, m is the magnification: 1/5580). = 3.58 mm.

  In other words, a mirror is installed 10 m away from a monitoring line having a length of 5 m and a width of 10 mm, and the reflection image of the monitoring line by the mirror is 640 × 480 pixels having an effective area of 5.6 μm × 5.6 μm. By forming an image with a lens having a focal length of 3.56 mm on a CCD image sensor configured side by side, an image can be formed with a length of 1/3 in the longitudinal direction of the CCD effective area, and the monitoring line is effectively The presence or absence of image defects can be detected.

Second Embodiment FIG. 8 is a schematic configuration diagram of a security system according to this embodiment.
The security system of this embodiment monitors the presence or absence of an intruder into a monitoring area using an optical sensor, and performs a predetermined notification operation when an intruder enters.
Here, the optical sensor described above is an image of the monitoring line 10, the imaging unit 11 arranged to capture the monitoring line 10 directly or by reflection, and the monitoring line 10 captured by the imaging unit 11. And a data processing unit 13 for processing the data I to determine whether the image of the monitoring line 10 is missing.
A space obtained by optically connecting the outline of the monitoring line 10 and the imaging unit 11 directly or by reflection is defined as a monitoring region 12 ′, and the data processing unit 13 monitors the presence or absence of an image of the monitoring line 10. The presence or absence of a light shield in the region 12 ′, that is, an intruder trying to cross the monitoring region is detected.

In the optical sensor of the security system of the present embodiment, it is preferable that the monitoring line emits light as in the first embodiment.
Similarly to the first embodiment, in the optical sensor described above, a mirror is provided in the imaging range of the imaging unit, and the imaging unit can take a reflected image of the monitoring line by the mirror, This mirror has a first reflecting surface and a second reflecting surface arranged so as to form an angle of 90 °, and emits light incident on the first reflecting surface from the second reflecting surface. It can be.

In the security system of the present embodiment, it is preferable that a plurality of monitoring lines and imaging units are provided, and a plurality of monitoring areas are configured. As a result, like the sensor area of the sensor area of the first embodiment, it becomes easy to make the overall monitoring area shape of a plurality of monitoring areas combined into a rectangular shape, and the optical sensor is applied to a security system. This makes it easy to design and handle optical sensors.
In addition, the above-described rectangular monitoring areas can be further combined in a loop shape. In this case, an intruder who tries to enter the loop from the outside of the loop or the outside from the inside of the loop can be detected.

The output of the data processing unit 13 is input to the monitoring control unit 15.
The monitoring control unit 15 is provided with a control panel, and a predetermined reporting action to be carried out when an intruder is detected is input in advance when monitoring is started or stopped by an input on the control panel by a user of the security system. You can select from the set options.

The above reporting action is, for example, sounding an alarm sound from a speaker connected to the monitoring control unit or emitting warning light by a lighting device connected to the monitoring control unit. This has the effect of informing the intruder that this has been detected.
It is also possible to report to a predetermined report destination. The report to the report destination includes, for example, calling a management center that manages the security system or a mobile phone of a user of the security system, or sending a mail to a designated Internet mail address. In this case, the monitoring control unit is connected to a telephone line or an Internet line.

FIG. 9 is a schematic diagram illustrating a configuration of an example of the security system according to the present embodiment installed in a building B such as a condominium to be monitored.
A monitoring area R that covers the side surface of the building B in which a veranda or the like that may be invaded by an intruder is provided in a rectangular shape is provided, and sensor portions S are provided on two opposite sides of the monitoring area R. ing. The sensor unit S includes a plurality of monitoring lines and an imaging unit.

  In addition, it is not always necessary to provide a monitoring area so as to cover the entire side of the building. For example, monitoring is performed so as to monitor locally, for example, a part or all of the entrance / exit of the building or a predetermined area near the keyhole of the door. A region can also be provided.

  According to the security system of the present embodiment, an optical sensor is used to monitor the presence or absence of an intruder into a monitoring area, and when a intruder enters, a predetermined notification operation is performed. The sensor processes the image data of the monitoring line by processing the image data of the monitoring line, the imaging unit arranged to directly or reflect the monitoring line, and the monitoring line captured by the imaging unit. By using an optical sensor having a data processing unit for determining the presence or absence of a chip, it is possible to effectively monitor the area to be monitored on a surface.

FIG. 10 is a schematic diagram showing an example of the configuration of the security system according to the present embodiment installed so that exhibits P1 and P2 such as paintings to be monitored are set as monitoring areas.
A rectangular monitoring region R is provided so as to cover the exhibits P1 and P2, and sensor portions S are provided on two opposite sides of the monitoring region R. The sensor unit S includes a plurality of monitoring lines and an imaging unit.
When monitoring flat exhibits such as paintings, the security system of this embodiment can be effectively monitored by using the optical sensor according to the first embodiment.

FIG. 11 is a schematic diagram illustrating a configuration of an example of a security system that is provided inside a fence provided on the outer periphery of a public facility such as a school to be monitored and detects an intruder into the facility.
A loop-shaped monitoring region R is provided inside the fence so as to include buildings such as school buildings and outdoor parts such as school yard, and a sensor unit S is provided so as to configure the loop-shaped monitoring region R. ing. The sensor unit S includes a plurality of monitoring lines and an imaging unit.
Intrusion into the entire facility, including buildings and outdoor parts, can be effectively monitored.
In addition, if a monitoring area is provided so as to cover the corridor of a building such as a school building or the surface of other floors, the intrusion into the building can be monitored.

  Further, according to the security system of the present embodiment, as an optical sensor in a security system that monitors the presence or absence of an intruder into a monitoring area using an optical sensor and performs a predetermined notification operation when an intruder has invaded. The space obtained by optically connecting the contour of the monitoring line and the imaging unit directly or by reflection can be used as the monitoring region, and the region connecting the long side of the contour of the monitoring line and the imaging unit can be defined as a plane. Can be monitored effectively.

The present invention is not limited to the description of the above embodiment.
For example, in the security system of the present invention, the monitoring area may be provided so as to cover the entire building such as a house or an apartment. Furthermore, the monitoring area may be provided at any position such as an indoor floor or wall.
Various modifications can be made without departing from the scope of the present invention.

The optical sensor of the present invention can be applied to an optical sensor for a security system.
The security system of the present invention can be applied to a security system that detects that an intruder has entered a monitoring target such as a building.

FIG. 1A is a schematic diagram showing the configuration of the optical sensor according to the first embodiment of the present invention, and FIG. 1B is a schematic diagram for explaining the operation of the optical sensor. FIG. 2 shows a sensor area configured as a flat surface in an area connecting the long side of the outline of the monitoring line and the imaging unit in the first embodiment of the present invention when viewed from the side surface in the thickness direction of the flat surface. It is a schematic diagram which shows the structure of an optical sensor. FIG. 3 is a schematic diagram showing an example of a configuration in which a sensor region is rectangular by combining a plurality of optical sensors in the first embodiment of the present invention. FIG. 4 is a schematic diagram showing an example of a configuration in which a sensor region is rectangular by combining a plurality of optical sensors in the first embodiment of the present invention. Fig.5 (a) is a schematic diagram which shows a structure when the rectangular-shaped flat surface which is a sensor area | region of the optical sensor which concerns on 1st Embodiment of this invention is seen from the side surface of the thickness direction, FIG. FIG. 5B is a schematic diagram illustrating the configuration of the optical sensor when viewed from the front, and FIG. 5C is a schematic diagram when the first imaging unit and the second imaging unit capture a virtual image by a mirror. It is. FIG. 6A is a schematic configuration diagram of an example for realizing the configuration of the mirror used in the first embodiment of the present invention, and FIG. 6B is a prism having the same function as FIG. 6A. It is a schematic block diagram of an example. FIG. 7A is a schematic diagram illustrating the configuration of the optical sensor according to the embodiment of the present invention. FIGS. 7B and 7C are obtained by the first imaging unit 11a and the second imaging unit 11b, respectively. It is a schematic diagram which shows the example of the image obtained. FIG. 8 is a schematic configuration diagram of a security system according to the second embodiment of the present invention. FIG. 9 is a schematic diagram showing a configuration of an example of the security system of the present embodiment installed in a building B such as an apartment to be monitored in the second embodiment of the present invention. FIG. 10 is a schematic diagram showing a configuration of an example of the security system according to the present embodiment installed so as to cover exhibits such as paintings to be monitored in the second embodiment of the present invention. FIG. 11 shows a configuration of an example of a security system that is provided inside a fence provided on the outer periphery of a public facility such as a school to be monitored in the second embodiment of the present invention and detects an intruder into the facility. It is a schematic diagram.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Monitoring line, 10a ... 1st monitoring line, 10b ... 2nd monitoring line, 11 ... Imaging part, 11a ... 1st imaging part, 11b ... 2nd imaging part, 11c ... 3rd imaging part, 12 ... Sensor area, 12a ... 1st sensor area, 12b ... 2nd sensor area, 12c ... 3rd sensor area, 12 '... Monitoring area, 13 ... Data processing part, 14 ... Mirror, 14a ... 1st mirror, 14b ... 2nd Mirror, 15 ... monitoring control unit, 20 ... shield, B ... building, F ... virtual image, I ... image, I '... missing, R ... monitoring area, S ... sensor unit

Claims (10)

A monitoring line;
An imaging unit arranged to image the monitoring line directly or reflected;
A data processing unit that processes the image data of the monitoring line imaged by the imaging unit and determines whether or not the image of the monitoring line is missing,
A space obtained by optically connecting the outline of the monitoring line and the imaging unit directly or by reflection is defined as a sensor region,
An optical sensor in which the data processing unit senses the presence or absence of a light blocking body in the sensor region based on the presence or absence of an image of the monitoring line. The optical sensor according to claim 1, wherein the monitoring line emits light. A mirror is provided in the imaging range of the imaging unit,
The optical sensor according to claim 1, wherein the imaging unit captures a reflected image of the monitoring line by the mirror. The mirror has a first reflecting surface and a second reflecting surface arranged so as to form an angle of 90 °, and emits light incident on the first reflecting surface from the second reflecting surface. The optical sensor according to claim 3. The optical sensor according to claim 1, wherein a plurality of the monitoring lines and the imaging units are provided, and a plurality of the sensor regions are configured. A security system that monitors the presence or absence of an intruder into a monitoring area using an optical sensor, and performs a predetermined notification operation when an intruder enters,
The optical sensor is
A monitoring line;
An imaging unit arranged to image the monitoring line directly or reflected;
A data processing unit that processes the image data of the monitoring line imaged by the imaging unit and determines whether or not the image of the monitoring line is missing,
A space obtained by optically connecting the outline of the monitoring line and the imaging unit directly or by reflection is defined as a monitoring area,
A security system in which the data processing unit senses the presence or absence of a light-shielding body in the monitoring area based on the presence or absence of missing images on the monitoring line. The security system according to claim 6, wherein the monitoring line emits light in the optical sensor. In the optical sensor, a mirror is provided in the imaging range of the imaging unit,
The security system according to claim 6, wherein the imaging unit captures a reflected image of the monitoring line by the mirror. In the optical sensor, the mirror has a first reflecting surface and a second reflecting surface arranged so as to form an angle of 90 °, and the light incident on the first reflecting surface is incident on the second reflecting surface. The security system according to claim 8, wherein the security system emits light from a reflecting surface. The security system according to claim 6, wherein the optical sensor includes a plurality of the monitoring lines and the imaging units, and a plurality of the monitoring areas are configured.

Images