CN209330226U - Monitoring device - Google Patents

Abstract

The utility model relates to the technical fields of monitoring device, provide a kind of monitoring device, including shell, light source and photographic unit；Light source is arranged on shell；Photographic unit includes camera lens and the imaging sensor with camera lens cooperation, light source can issue the outgoing beam of predetermined wavelength and be irradiated on the target object from camera lens preset distance, and outgoing beam is able to image on imaging sensor after being reflected by target object by camera lens；It is at an acute angle between the direction and the light direction of light source of camera lens.The reflection light of target object includes two parts, and a part is mirror-reflection light, and another part is diffusing reflection light；Diffusing reflection light can sufficiently show the profile of target object, so that diffusing reflection light, which is transmitted to imaging sensor by camera lens, is capable of forming clear-cut image.

Description

Monitoring device

Technical field

The utility model belongs to monitoring device technical field, is to be related to a kind of monitoring device more specifically.

Background technique

With the development of modern society, people increasingly pay attention to safety, either in vehicular field or field of traffic, prison Control device all plays the part of important function.Existing monitoring device generally includes photographic unit and light source, and light source is disposed around photographic unit Outside, and the optical axis of photographic unit is identical with the light direction of light source, and the light that light source issues encounters target object (such as people Body eye portion) if cause mirror-reflection, and the mirror surface reflection light it is too strong when be very easy to direct irradiation photographic unit, Cause photographic unit be formed by image whiten and can not resolution image details.

Utility model content

The purpose of this utility model is to provide a kind of monitoring devices, are irradiated to solving light source existing in the prior art The mirror-reflection light generated on target object, which is easy to shine directly into photographic unit, to be caused image to whiten and can not differentiate figure As the technical issues of details.

In order to achieve the above purposes, the technical solution adopted by the utility model is: provides a kind of monitoring device, including shell, Light source and photographic unit；The light source setting is on the housing；The photographic unit includes camera lens and matches with the camera lens The imaging sensor of conjunction, the light source can issue the outgoing beam of predetermined wavelength and be irradiated to from the camera lens preset distance On target object, the outgoing beam is able to image to described image by the camera lens after being reflected by the target object and senses On device；It is at an acute angle between the direction and the light direction of the light source of the camera lens.

Further, in the incident side of the camera lens, the optical axis of the camera lens is located at the top of the outgoing beam.

Further, the outgoing beam that the light source generates is infrared light.

Further, a length of 940nm ± 20nm of the infrared waves.

Further, the shell is enclosed the chamber with light-emitting window, and the first optical filtering is provided in the light-emitting window Piece；The light source, the camera lens and described image sensor are separately positioned in the chamber；First optical filter can Filtering visible light simultaneously passes through for the outgoing beam.

Further, first optical filter is integral piece made of grey or black material.

Further, the light source has optical axis；In the chamber, the optical axis of the optical axis of the light source and the camera lens The distance between be greater than the lens focus half.

Further, being provided between the light source and first optical filter prevents light leakage mechanism, described to prevent light leakage The outgoing beam that mechanism can prevent the light source from generating leaks into the chamber.

Further, second passed through for the light for the predetermined wavelength that be sticked in described image sensor is filtered Piece.

Further, second optical filter is towards being covered with anti-reflection film and/or institute on the surface of the camera lens side The second optical filter is stated towards being covered with bandpass filters on the surface of described image sensor side；The anti-reflection film can increase The light of the predetermined wavelength enters in second optical filter, and the bandpass filters can be for centered on predetermined wavelength ± 20nm wavelength band in light pass through.

The beneficial effect of monitoring device provided by the utility model is: compared with prior art, the utility model provides Monitoring device, light source issue predetermined wavelength outgoing beam simultaneously be irradiated on target object, the reflection light packet of target object Two parts are included, a part is mirror-reflection light (eyes for being irradiated to people are easy to appear mirror-reflection), and another part is unrestrained anti- Penetrate light (being irradiated on the skin of people as diffusing reflection)；Due at an acute angle, mirror between the direction and the light direction of light source of camera lens Face reflection light is not easy the case where direct irradiation camera lens occur, avoid shots to light intensity excessively high image is caused to pass Image formed by sensor whitens or the details of the image is fuzzy；Diffusing reflection light can sufficiently show the profile of target object, make Diffusing reflection light is transmitted to imaging sensor by camera lens and is capable of forming clear-cut image.

Detailed description of the invention

It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with It obtains other drawings based on these drawings.

Fig. 1 is the top cross-sectional view of monitoring device provided by the embodiment of the utility model；

Fig. 2 is the left view cross-sectional schematic schematic diagram of monitoring device provided by the embodiment of the utility model；

Fig. 3 is the left view schematic diagram of camera lens provided by the embodiment of the utility model and light source.

Wherein, each appended drawing reference in figure:

1- shell；11- chamber；The first optical filter of 12-；2- light source；21- outgoing beam；3- photographic unit；31- camera lens； 32- imaging sensor；The second optical filter of 331-；332- anti-reflection film；333- bandpass filters；4- target object；41- first It sets；The second position 42-.

Specific embodiment

In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.

It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is that orientation based on the figure or position are closed System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

Also referring to Fig. 1 to Fig. 3, now monitoring device provided by the utility model is illustrated.Monitoring device includes Shell 1, light source 2 and photographic unit 3；Light source 2 is arranged on shell 1；Photographic unit 3 includes camera lens 31 and matches with camera lens 31 The imaging sensor 32 of conjunction, light source 2 can issue the outgoing beam 21 of predetermined wavelength and be irradiated to from 31 preset distance of camera lens On target object 4, outgoing beam 21 is able to image on imaging sensor 32 after being reflected by target object 4 by camera lens 31；Mirror It is at an acute angle between first 31 direction and the light direction of light source 2.

In this way, light source 2 issues the outgoing beam of predetermined wavelength and is irradiated on target object 4, the reflection of target object 4 Light includes two parts, and a part is mirror-reflection light (such as: the eyes for being irradiated to people are easy to appear mirror-reflection), another Part is diffusing reflection light (such as: being irradiated on the skin of people as diffusing reflection)；Due to the direction and the light out of light source 2 of camera lens 31 At an acute angle between direction, mirror-reflection light is not easy the case where direct irradiation camera lens 31 occur, and camera lens 31 is avoided to be collected into Light intensity is excessively high to lead to that image formed by imaging sensor 32 whitens or the details of the image is fuzzy；Diffusing reflection light can fill Divide the profile for showing target object 4, so that diffusing reflection light, which is transmitted to imaging sensor 32 by camera lens 31, is capable of forming profile Clearly image.

Optionally, in one embodiment, imaging sensor 32 is CCD or CMOS.

Optionally, in one embodiment, shell 1 is in cylindrical shape.Specifically, in one embodiment, the one of shell 1 A end face has opening, and light source 2 and photographic unit 3 be separately positioned in shell 1, and the light that light source 2 issues can be from being open out Come.

Optionally, in one embodiment, light source 2 and be LED light.

Optionally, in one embodiment, camera lens 31 is convex lens.Optionally, in one embodiment, camera lens 31 includes One lens group, the lens group can will be in the image projections of external environment to imaging sensor 32.

Optionally, in one embodiment, target object 4 is driver/passenger in vehicle.Specifically, target object 4 is Driver/passenger eye.

Optionally, in one embodiment, the angle between the direction and the light direction of light source 2 of camera lens 31 is less than 60 °. Specifically, in one embodiment, the angle between the direction and the light direction of light source 2 of camera lens 31 is less than 45 °.Specifically, In one embodiment, the angle between the direction and the light direction of light source 2 of camera lens 31 is less than 30 °.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, in the incident side of camera lens 31, the optical axis of camera lens 31 is located at the top of outgoing beam.In this way, usually target object 4 is located at ground Or on seat, the optical axis of camera lens 31 is located at the top of outgoing beam, and outgoing beam 21 has bigger possibility that can be irradiated to target Object 4, as long as outgoing beam 21 can be irradiated to target object 4, target object 4 can be obtained after passing through diffusing reflection by camera lens 31 It takes.

Specifically, in one embodiment, find a view position of the camera lens 31 on target object 4 is first position 41, outgoing It is the second position 42 that light beam 21, which is radiated at the position on target object 4, and first position 41 is located at the top of the second position 42.

In one embodiment, when first position 41 is the eye of people, the second position 42 can be the face of people, outgoing Diffusing reflection meeting is generated when light beam 21 is radiated at the face of people so that the illumination of eye is more uniform, reduces imaging sensor 32 Noise, imaging sensor 32 can highlight more details.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, the outgoing beam 21 that light source 2 generates are infrared light.In this way, user is not easy to perceive when Infrared irradiation user, so that The outgoing beam 21 that light source 2 generates does not affect user.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, a length of 940nm ± 20nm of infrared waves.In this way, wavelength is long for the wavelength of the infrared light of 940nm, with conventional 850nm The infrared light of wavelength is compared, and the radiation intensity of the infrared light of 940nm is lower, reduces when light source 2 illuminates and red sudden and violent phenomenon occurs.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, shell 1 are enclosed the chamber 11 with light-emitting window (not shown), the first optical filter 12 are provided in light-emitting window；Light source 2, Camera lens 31 and imaging sensor 32 are separately positioned in chamber 11；First optical filter 12 can filter visible light and for outgoing Light beam 21 passes through.It enters in chamber 11 in this way, the first optical filter 12 can be avoided the visible light in external environment to influence Imaging sensor 32；And the light source 2 in chamber 11 irradiation when, if produce some visible light, some visible light also without Method avoids some visible light from being irradiated on target object 4 by the first optical filter 12.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, the first optical filter 12 are integral piece made of grey or black material.In this way, being kept away when user sees the first optical filter 12 Exempt from user it can be seen that inside chamber 11, while can also reduce user and the sense of discomfort monitored by camera lens 31 occur.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, light source 2 have optical axis；In chamber 11, the distance between optical axis and the optical axis of camera lens 31 of light source 2 are greater than 31 focal length of camera lens Half.In this way, the case where avoiding 31 common optical axis of light source 2 and camera lens, the outgoing beam 21 for reducing light source 2 passes through object The case where direct mirror-reflection of body 4 to camera lens 31.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, being provided between light source 2 and the first optical filter 12 prevents light leakage mechanism, prevents light leakage mechanism from light source 2 can be prevented to generate Outgoing beam 21 leaks into chamber 11.In this way, the light that light source 2 when luminous, prevents light leakage mechanism from light source 2 can be prevented to issue Line enters in chamber 11 and interferes the imaging sensor 32 being located in chamber 11.

Specifically, in one embodiment, preventing light leakage mechanism is that the black sponge cover that ring is located on the outside of light source 2 (does not show Out).Specifically, in another embodiment, preventing light leakage mechanism is that the annular convex platform being formed on the first optical filter 12 (does not show Out), the light out part of light source 2 is located in annular convex platform, and the light which can block the sending of light source 2 enters chamber 11 It is interior.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, be sticked on imaging sensor 32 the second optical filter 331 passed through for the light for predetermined wavelength.In this way, camera lens 31 is received The light collected is filtered by the second optical filter 331 again before reaching imaging sensor 32, avoids light disturbance imaging sensor 32 imaging；In addition, the second optical filter 331 is sticked on imaging sensor 32, light can occur when passing through the second optical filter 331 Refraction, for the second optical filter 331, refraction angle is less than incidence angle, enables the light after the second optical filter 331 It is enough to be reached on imaging sensor 32 with smaller angle, so that the edge details of image are more clear.

Further, it please refers to Fig.1 to Fig.3, a kind of specific embodiment party as monitoring device provided by the utility model Formula, the second optical filter 331 is towards being covered with 331 direction of anti-reflection film 332 and/or the second optical filter on the surface of 31 side of camera lens Bandpass filters 333 are covered on the surface of 32 side of imaging sensor；Anti-reflection film 332 can increase the light of predetermined wavelength into Enter in the second optical filter 331, bandpass filters 333 can be in ± 20nm the wavelength band centered on predetermined wavelength Light passes through.The second optical filter 331 is entered in this way, can increase when light reaches the second optical filter 331 by anti-reflection film 332 Interior light；It can further filter out by the light of the second optical filter 331 using bandpass filters 333 miscellaneous in light Light.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (10)

1. monitoring device, including shell, light source and photographic unit；It is characterized by: the light source is arranged in the shell On；The photographic unit includes camera lens and the imaging sensor with camera lens cooperation, and the light source can issue predetermined wavelength Outgoing beam and be irradiated on the target object from the camera lens preset distance, the outgoing beam is anti-by the target object It is able to image in described image sensor after penetrating by the camera lens；The direction and the light direction of the light source of the camera lens Between it is at an acute angle.

2. monitoring device as described in claim 1, it is characterised in that: in the incident side of the camera lens, the optical axis of the camera lens Positioned at the top of the outgoing beam.

3. monitoring device as described in claim 1, it is characterised in that: the outgoing beam that the light source generates is infrared Light.

4. monitoring device as claimed in claim 3, it is characterised in that: a length of 940nm ± 20nm of infrared waves.

5. monitoring device as claimed in claim 3, it is characterised in that: the shell is enclosed the chamber with light-emitting window, The first optical filter is provided in the light-emitting window；The light source, the camera lens and described image sensor are separately positioned on institute It states in chamber；First optical filter can filter visible light and pass through for the outgoing beam.

6. monitoring device as claimed in claim 5, it is characterised in that: first optical filter is made of grey or black material Integral piece.

7. monitoring device as claimed in claim 5, it is characterised in that: the light source has optical axis；It is described in the chamber The distance between optical axis of the optical axis of light source and the camera lens is greater than the half of the lens focus.

8. monitoring device as claimed in claim 5, it is characterised in that: be provided between the light source and first optical filter Light leakage mechanism is prevented, the outgoing beam for preventing light leakage mechanism from the light source can be prevented to generate leaks into the chamber It is interior.

9. monitoring device as described in claim 1, it is characterised in that: being sticked in described image sensor has for for described pre- The second optical filter that the long light of standing wave passes through.

10. monitoring device as claimed in claim 9, it is characterised in that: second optical filter is towards the camera lens side Anti-reflection film and/or second optical filter are covered on surface towards being covered with band on the surface of described image sensor side Logical filter coating；The light that the anti-reflection film can increase the predetermined wavelength enters in second optical filter, the band logical filter Light film can pass through for the light in the ± 20nm wavelength band centered on the predetermined wavelength.