TW201925896A - Surveillance camera with switchable filter and external lens of surveillance camera with an Infrared Cut-Off Filter to filter the infrared rays when the visible light is sufficient, and an Infrared Passing Filter to filter the visible light in the case of insufficient visible light - Google Patents

Abstract

The present invention relates to a surveillance camera with a switchable filter and an external lens of the surveillance camera, wherein a lens module, an infrared light source module, a photosensitive element, and a filter component are mounted in the housing of the surveillance camera or the housing of the external lens. The filter component has a moving frame and a motor driving module that can drive the moving frame to move linearly back and forth, and the moving frame is embedded with an infrared cut-off filter and an infrared passing filter. During the usage, when the visible light is sufficient, the infrared cut-off filter is used to filter the infrared rays in the light, so that the surveillance camera can obtain the image with real color; in the case of insufficient visible light, the infrared passing filter is used to filter the visible light, so that the surveillance camera can achieve clear imaging.

Description

Surveillance camera with switchable filter and external camera for surveillance camera

The invention relates to a surveillance camera and a surveillance camera external lens, in particular to a surveillance camera with a switchable filter and an external camera for the surveillance camera.

In recent years, with the advancement of science and technology and the reasons for public security, surveillance photography systems have been widely installed in public places such as communities, intersections, etc., and video recording and monitoring of key areas of public security have been continuously monitored around the clock.

The surveillance camera of the above-described surveillance imaging system mainly uses a photosensitive element to generate a monitoring screen. Among them, the wavelength range that the human eye can feel is about 380 nm to 680 nm, the photosensitive element can sense a wider wavelength range than the human eye, and the infrared light is because the wavelength is above 700 nm. Therefore, in the case of sufficient visible light (for example, during the daytime), the infrared rays in the light will cause the image on the photosensitive element to be reddish and different from the image actually seen by the human eye, so that the prior art monitoring camera will be in the photosensitive element. An infrared filter is installed in front of the infrared filter to filter out the infrared rays in the light to make the image appear real color; and in the case of insufficient visible light (for example, at night), the infrared filter is self-infrared. The photosensitive element is moved forward, so that the photosensitive element can generate a nighttime monitoring picture by sensing infrared rays.

However, in the night mode where the visible light is insufficient, the visible light emitted by various night illuminations such as street lamps, lights, etc. is not only easy to produce glare on the screen, but also creates a shadow on the screen due to the stroboscopic problem, so that it is impossible to The problem of obtaining a clear image needs further improvement.

In view of the above problems in the prior art, an object of the present invention is to provide an external lens for a surveillance camera and a surveillance camera. The surveillance camera and the external lens are provided with an infrared filter (Infrared Cut-Off). Filter) and an Infrared Passing Filter, which filters the infrared rays during the day to make the image on the photosensitive element appear real color, and the visible light filter filters the visible light at night to make the image clear. .

In order to achieve the above-mentioned creative purpose, the technical means adopted by the present invention is such that a surveillance camera comprises: a casing having a front opening at a front end thereof; and a lens module mounted at an opening in front of the casing; An infrared light source module is mounted on the front opening of the casing and surrounds the front end of the lens module; a photosensitive element is mounted in the casing and located behind the lens module a filter assembly is disposed between the lens module and the photosensitive element and includes an outer frame, a moving frame, an infrared filter, a visible light filter, and a motor driving die The outer frame body has two opposite side plates, and a sliding space is formed between the two opposite side plates. The outer frame body is provided with a through hole penetrating the two opposite side plates, and one side plate of the outer frame body is formed through a side plate. An arcuate guide groove is disposed in the sliding space of the outer frame body in a linearly movable manner. One end of the moving frame protrudes to form an extending arm, and the extending arm forms a long hole therein. The position of the hole corresponds to the outer frame An arc-shaped guide groove, the infrared filter and the visible light filter are embedded on the moving frame and arranged along the moving direction of the moving frame, and the motor driving die is assembled on the outer frame and located at the Moving the side of the extension arm of the frame, the motor drive module has a driving arm, the driving arm is located in the sliding space of the outer frame body and can be driven to be deflected laterally back and forth, and the driving arm is provided with a latch. The latch is disposed in the long hole of the moving frame and the arcuate guide groove of the outer frame, and the arcuate guide groove of the outer frame extends along the moving track of the pin; when the driving arm is deflected laterally back and forth The latch moves back and forth along the arcuate guide groove, and the moving frame moves linearly back and forth via the extending arm of the moving frame, so that the positions of the infrared filter and the visible light filter alternately correspond to the perforation of the outer frame .

In the surveillance camera, the infrared filter of the filter assembly can pass visible light having a wavelength between 380 nm and 650 nm.

In the surveillance camera, the visible light filter of the filter assembly can pass infrared light having a wavelength between 830 nm and 870 nm.

In the surveillance camera, the motor drive module can have a stator and a rotor, the stator has a coil winding, and a magnet is fixed on the rotor, and the drive arm extends radially from the rotor.

In order to achieve the above-mentioned creative purpose, another technical means adopted by the present invention is to make an external lens of a surveillance camera include: a casing having an opening at a front end thereof; and a lens module mounted on the casing An infrared light source module is disposed at a front opening of the housing and surrounds the front end of the lens module; a photosensitive element is mounted in the housing and located at the lens a filter assembly is disposed between the lens module and the photosensitive element and includes an outer frame, a moving frame, an infrared filter, a visible light filter, and a motor drive module, the outer frame body has two opposite side plates, and a sliding space is formed between the two opposite side plates. The outer frame body is provided with a through hole penetrating the two opposite side plates, and one side plate of the outer frame body An arcuate guide groove is formed in the upper portion, and the moving frame is disposed in a sliding space of the outer frame body. The one end of the moving frame protrudes to form an extending arm, and the extending arm forms a length. Hole, the position of the long hole The infrared filter and the visible light filter are embedded on the moving frame and arranged along the moving direction of the moving frame, and the motor driving die is assembled on the outer frame. The motor drive module has a driving arm located in a sliding space of the outer frame and can be driven to be deflected laterally back and forth. The driving arm is disposed on the side of the extending arm of the moving frame. a latch is disposed, the pin is disposed in the long hole of the moving frame and the arcuate guide groove of the outer frame, and the arcuate guide groove of the outer frame extends along a movement track of the pin; When the side is deflected back and forth, the latch moves back and forth along the arcuate guide groove, and the moving frame moves linearly back and forth via the extending arm of the moving frame, so that the positions of the infrared filter and the visible light filter alternately correspond to each other. Perforation of the outer frame.

In the external camera of the surveillance camera, the infrared filter of the filter assembly can pass visible light having a wavelength between 380 nm and 650 nm.

In the external camera of the surveillance camera, the visible light filter of the filter assembly can pass infrared rays having a wavelength between 830 nm and 870 nm.

In the external camera lens of the monitoring camera, the motor driving module can have a stator and a rotor, the stator has a coil winding, and a magnet is fixed on the rotor, and the driving arm extends radially from the rotor.

With the above design, in the case where the visible light is sufficient, the driving arm of the motor driving module can move the moving frame, so that the position of the infrared filter on the moving frame corresponds to the perforation of the outer frame body. The infrared filter is used to filter the infrared rays in the light, so that the surveillance camera can obtain the image with real color; in the case of insufficient visible light, the driving arm of the motor driving module can drive the moving frame to reverse Moving, the position of the visible light filter on the moving frame corresponds to the perforation of the outer frame, and the visible light filter is used to filter visible light in the light, so that the surveillance camera can obtain clear imaging.

The technical means adopted by the present invention for achieving the intended purpose of the invention are further described below in conjunction with the drawings and preferred embodiments of the invention.

As shown in FIG. 1 and FIG. 2, the surveillance camera of the present invention has a casing 10, a lens module 20, an infrared light source module 30, a photosensitive element 40, and a filter assembly 50.

The casing 10 has a front end, and a front opening 11 is provided at a front end of the casing 10.

The lens module 20 is disposed in the casing 10 and is located at the opening 11 of the casing 10. The lens module 20 is configured to guide light into the casing 10. The lens module 20 has a front end. The front end of the lens module 20 faces the front end of the casing 10.

The infrared light source module 30 is disposed at the front opening 11 of the casing 10 and surrounds the front end of the lens module 20 . The infrared light source module 30 has a plurality of infrared light emitting diodes 31 . The diode 31 is arranged on the outer side of the front end of the lens module 20 and emits infrared light toward the front of the surveillance camera.

As shown in FIG. 3 and FIG. 4 , the photosensitive element 40 is disposed in the casing 10 and located on the rear side of the lens module 40 .

The filter assembly 50 is disposed between the lens module 20 and the photosensitive element 40. The light introduced into the casing 10 via the lens module 20 passes through the filter assembly 50 first, and then further An image is generated on the photosensitive element 30. Referring to FIG. 5 , the filter assembly 50 includes an outer frame 51 , a moving frame 52 , an infrared filter 53 , a visible light filter 54 , and a motor driving module 55 .

The outer frame body 51 has two opposite side plates, and a sliding space 511 is formed between the two opposite side plates. The outer frame body 51 is provided with a through hole 512 extending through the opposite side plates. The position of the through hole 512 corresponds to the foregoing through the lens. The module 20 is guided into the path of the light inside the casing 10, and an arcuate guide groove 513 is formed in one of the outer frames 51.

As shown in FIG. 6 , the moving frame 52 is disposed in a sliding space 511 of the outer frame body 51 . The one end of the moving frame 52 protrudes to form an extending arm 521 . A long hole 522 is formed through the arcuate guide groove 513 of the outer frame body 51.

The infrared filter 53 is an infrared ray for filtering, and the visible light filter 54 is for filtering visible light. Specifically, the infrared filter 53 can pass visible light having a wavelength between 380 nm and 650 nm, and the visible light filter 54 can only pass infrared rays having a wavelength between 830 nm and 870 nm. The infrared filter 53 and the visible light filter 54 are embedded on the moving frame 52 and arranged along the moving direction of the moving frame 52, and the moving frame is 52 in the sliding space 511 of the outer frame 51. Moving, the positions of the infrared filter 53 and the visible light filter 54 alternately correspond to the through holes 512 of the outer frame 51.

The motor driving module 55 is disposed on the outer frame body 51 and located on the side of the extending arm 521 of the moving frame 52. The motor driving module 55 has a driving arm 551, and the driving arm 551 is located in the outer frame body. The sliding space 511 of the 51 can be driven to be deflected laterally. The driving arm 551 is provided with a latch 552. The latch 522 is simultaneously inserted into the long hole 522 of the moving frame 52 and the arc of the outer frame 51. In the guide groove 513, the arcuate guide groove 513 of the outer frame body 51 extends along the movement locus of the plug pin 552. When the driving arm 551 is deflected sideways, the latch 552 moves back and forth along the curved guiding slot 513, and the moving frame 522 is linearly moved back and forth via the extending arm 521 of the moving frame 522, so that the infrared filter 53 is moved. The position of the visible light filter 54 alternately corresponds to the through hole 512 of the outer frame body 51, and the curved guide groove 513 is used to limit the angular range of the drive arm 551 to be deflected back and forth.

Specifically, the motor driving module 55 drives the driving arm 551 to deflect back and forth laterally by electromagnetic induction. The motor driving module 55 has a stator and a rotor, and the stator has a coil winding 554. A magnet 555 is fixed on the rotor, and the driving arm 551 extends radially from the rotor. By changing the direction of the current flowing into the coil winding 554, a magnetic field that attracts or repels the magnet can be generated to drive the magnetic field. The rotor and the drive arm 551 are deflected laterally back and forth.

Referring to FIG. 7 , in addition to the external camera lens 60 of the present invention, the lens module 20 , the infrared light source module 30 , the photosensitive element 40 , and the filter assembly 50 are mounted on a housing 61 of the external lens 60 . A front opening is disposed at a front end of the housing 61. The lens module 20 is disposed at an opening of the front end of the housing 61. The infrared light source module 30 is disposed around an inner side of the front end of the lens module 20. The photosensitive element 40 is mounted on the rear side of the lens module 20, and the filter assembly 50 is disposed between the lens module 20 and the photosensitive element 40. The external lens 60 can be assembled in one of the monitoring cameras. On the main body, a surveillance camera that requires an external lens 60 is also provided with an effect that the infrared filter 53 or the visible light filter 54 can be switched.

With the above design, as shown in FIG. 5, when the photo sensor provided on the surveillance camera senses that the surrounding visible light is insufficient (for example, at night), the infrared light source module 30 is turned on. The driving arm 551 of the motor driving module 55 is driven to deflect in the other direction, and drives the moving frame 52 to move in the opposite direction, so that the position of the visible light filter 54 on the moving frame 52 corresponds to the outer frame. A perforation 512 of 51, by which the visible light filter 54 is used to filter visible light in the light, and the infrared camera can obtain clear imaging with pure infrared rays.

As shown in FIG. 6, when the photo sensor installed on the surveillance camera senses that the surrounding visible light is sufficient (for example, during the daytime), the infrared light source module 30 is turned off, and the motor driving module 55 is The driving arm 551 is driven to deflect in one direction, and drives the moving frame 52 to move in a direction, so that the position of the infrared filter 53 on the moving frame 52 corresponds to the through hole 512 of the outer frame 51, and the infrared filter is filtered by the infrared filter. Sheet 53 filters the infrared light in the light, allowing the surveillance camera to obtain an image that exhibits true color.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The present invention has been described above by way of preferred embodiments, but is not intended to limit the present invention, and any skilled person skilled in the art. Any simple modifications, equivalent changes and modifications to the above embodiments in accordance with the technical scope of the present invention are still within the scope of the technical solutions of the present invention.

10‧‧‧Chassis

11‧‧‧ front opening

20‧‧‧Lens module

30‧‧‧Infrared light source module

31‧‧‧Infrared light-emitting diode

40‧‧‧Photosensitive elements

50‧‧‧Filter assembly

51‧‧‧Outer frame

511‧‧‧Sliding space

512‧‧‧Perforation

513‧‧‧Shave guides

52‧‧‧ moving box

521‧‧‧Extension arm

522‧‧‧ long hole

53‧‧‧Infrared filter

54‧‧‧ Visible light filter

55‧‧‧Motor drive module

551‧‧‧ drive arm

552‧‧‧Latch

554‧‧‧Electromagnetic coil

555‧‧‧ magnet

60‧‧‧ external lens

61‧‧‧Shell

Fig. 1 is a perspective view showing the appearance of a surveillance camera of the present invention. Fig. 2 is an exploded perspective view showing a part of the components of the surveillance camera of the present invention. 3 is a perspective view of the lens module, the photosensitive element, and the filter assembly of the surveillance camera of the present invention. 4 is an exploded perspective view of a lens module, a photosensitive element, and a filter assembly of the surveillance camera of the present invention. 5 is a side cross-sectional view of the filter assembly of the surveillance camera of the present invention, wherein the filter assembly is in a state capable of filtering visible light. Figure 6 is a side cross-sectional view showing the filter assembly of the surveillance camera of the present invention, wherein the filter assembly is in a state capable of filtering infrared rays. Fig. 7 is a perspective view showing the external lens of the surveillance camera of the present invention.

Claims (8)

A surveillance camera having a casing, a lens module, an infrared light source module, a photosensitive element and a filter assembly, wherein: a front opening is provided at a front end of the casing; the lens assembly is assembled The infrared light source module is assembled at a front opening of the casing and is disposed around the front end of the lens module; the photosensitive element is disposed in the casing and located in the lens mold The filter assembly is disposed between the lens module and the photosensitive element and includes an outer frame, a moving frame, an infrared filter, a visible light filter, and a motor driving die The outer frame body has two opposite side plates, and a sliding space is formed between the two opposite side plates. The outer frame body is provided with a through hole penetrating the two opposite side plates, and one side plate of the outer frame body is formed through a side plate. An arcuate guide groove is disposed in the sliding space of the outer frame body in a linearly movable manner. One end of the moving frame protrudes to form an extending arm, and the extending arm forms a long hole therein. The position of the hole corresponds to the outside An arc-shaped guide groove, the infrared filter and the visible light filter are embedded on the moving frame and arranged along the moving direction of the moving frame, and the motor driving die is assembled on the outer frame and located a side of the extension arm of the moving frame, the motor driving module has a driving arm, the driving arm is located in the sliding space of the outer frame body and can be driven to be deflected laterally back and forth, and the driving arm is provided with a latch The insertion pin is disposed in the long hole of the moving frame and the arcuate guide groove of the outer frame body, and the arcuate guide groove of the outer frame body extends along the movement track of the pin; when the driving arm is deflected sideways The latch moves back and forth along the arcuate guide groove, and the moving frame moves linearly back and forth via the extending arm of the moving frame, so that the positions of the infrared filter and the visible light filter alternately correspond to the outer frame perforation. The surveillance camera of claim 1, wherein the infrared filter of the filter assembly is capable of passing visible light having a wavelength between 380 nm and 650 nm. The surveillance camera of claim 1 wherein the visible light filter of the filter assembly is capable of passing infrared light having a wavelength between 830 nm and 870 nm. The surveillance camera of any one of claims 1 to 3, wherein the motor drive module has a stator and a rotor, the stator has a coil winding, and a magnet is fixed on the rotor, and the driving arm is The rotor extends radially. An external lens for a surveillance camera, comprising: a housing, a lens module, an infrared light source module, a photosensitive element and a filter assembly, wherein: an opening is provided at a front end of the housing; The infrared light source module is assembled at a front opening of the housing and is disposed around the front end of the lens module; the photosensitive element is disposed in the housing and located at the opening a rear side of the lens module; the filter assembly is disposed between the lens module and the photosensitive element and includes an outer frame, a moving frame, an infrared filter, a visible light filter, and a motor a driving module, the outer frame body has two opposite side plates, and a sliding space is formed between the two opposite side plates, and the outer frame body is provided with a through hole penetrating the two opposite side plates, wherein one side plate of the outer frame body runs through An arcuate guide groove is formed, and the moving frame is disposed in a sliding space of the outer frame body. The one end of the moving frame protrudes to form an extending arm, and a long hole is formed in the extending arm. The position of the long hole An arc-shaped guide groove of the outer frame body, the infrared filter and the visible light filter are embedded on the moving frame and arranged along the moving direction of the moving frame, and the motor driving die is assembled on the outer frame And on the side of the extension arm of the moving frame, the motor driving module has a driving arm, the driving arm is located in the sliding space of the outer frame body and can be driven to be deflected laterally back and forth. a latch is disposed, the pin is disposed in the long hole of the moving frame and the arcuate guide groove of the outer frame, and the arcuate guide groove of the outer frame extends along a moving track of the pin; when the driving arm side When deflecting back and forth, the latch moves back and forth along the arcuate guide groove, and the moving frame moves linearly back and forth via the extending arm of the moving frame, so that the positions of the infrared filter and the visible light filter alternately correspond to each other. Perforation of the frame. The surveillance camera of claim 5 is externally coupled to the lens, wherein the infrared filter of the filter assembly is capable of passing visible light having a wavelength between 380 nm and 650 nm. The surveillance camera of claim 5 is external to the lens, wherein the visible light filter of the filter assembly is capable of passing infrared light having a wavelength between 830 nm and 870 nm. The monitoring camera external lens according to any one of claims 5 to 7, wherein the motor driving module has a stator and a rotor, the stator has a coil winding, and a magnet is fixed on the rotor, the driving The arm extends radially from the rotor.