CN104989998B - Light source device for machine vision and method for changing light source angle - Google Patents
Light source device for machine vision and method for changing light source angle Download PDFInfo
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- CN104989998B CN104989998B CN201510367466.XA CN201510367466A CN104989998B CN 104989998 B CN104989998 B CN 104989998B CN 201510367466 A CN201510367466 A CN 201510367466A CN 104989998 B CN104989998 B CN 104989998B
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- light
- prism
- angle
- angular adjustment
- machine vision
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
Abstract
The invention discloses a light source device for machine vision and a method for changing the angle of a light source. The light source device includes a case, a light emitting panel mounted on an upper portion of the case, and an angle adjusting prism detachably mounted on a lower portion of the case. And the angle adjusting prism is positioned right below the light-emitting panel so as to adjust the angle of emergent rays of the light-emitting panel to an illumination angle. In the technical scheme of the invention, the light source device for machine vision is additionally provided with the angle adjusting prism for deflecting light rays on the basis of vertical light rays, so that the emergent angles of all the light rays are changed to the same angle, and annular light with different illumination angles is realized. And the angle adjusting prisms with different angles can realize ring light sources with different illumination angles, and the light rays are not crossed when being turned, so that the uniformity of the original light spots is not influenced.
Description
Technical field
The present invention relates to lighting source field, more particularly, to a kind of machine vision light supply apparatus and changes light-source angle
Method.
Background technology
At present, in machine vision light source detecting system, in order to meet that different use condition needs buy different angle
Loop light device, the angular range of loop light device is usually 0 ° to 90 °.As can be seen that nonstandardized technique, non-universal loop light device
With poor universality, production cost is high, using purchase cost it is high the problems such as.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of machine vision light supply apparatus and changes light-source angle
Method.
The technical solution adopted for the present invention to solve the technical problems is：A kind of machine vision light supply apparatus is constructed, its
Including housing, luminescent panel and angular adjustment prism, the luminescent panel is arranged on the top of the housing, the angular adjustment
Prism is detachably arranged in the bottom of the housing；And the angular adjustment prism is located at the underface of the luminescent panel,
With by the angular adjustment of the emergent ray of the luminescent panel to light angle.
In the machine vision light supply apparatus of the present invention, the luminescent panel includes at least row encapsulation arranged in a ring
LED, the light direction of the luminescent panel is towards the first face of the angular adjustment prism, and the emergent ray is perpendicular to institute
State the ring light in the first face of angular adjustment prism.
In the machine vision light supply apparatus of the present invention, the angular adjustment prism includes refraction type prism in a ring；
The light angle is c, and c=90 ° of+a-b, wherein, a is the refraction that the ring light passes through the refraction type prism
Incident angle behind face, b are shooting angle of the ring light after the plane of refraction of the refraction type prism.
In the machine vision light supply apparatus of the present invention, the angular adjustment prism includes reflective prism in a ring；
The light angle is c ', and c '=- 90 ° of a '+b ', wherein, a ' is that the ring light passes through the reflective prism
Reflecting surface after incident angle, b ' is shooting angle of the ring light after the reflecting surface of the reflective prism, i.e. a '
=b '.
In the machine vision light supply apparatus of the present invention, the angular adjustment prism and light of the luminescent panel along camera lens
Distance on direction of principal axis is adjustable.
In the machine vision light supply apparatus of the present invention, the middle part of the housing is entered formed with the light reflected on workpiece
Enter the transmittance section of camera lens, the transmittance section is located on the optical axis of the camera lens.
In the machine vision light supply apparatus of the present invention, the side of the housing is provided with for the light supply apparatus to be pacified
At least one pair of mounting hole being attached on camera lens, the pair of mounting hole are symmetric relative to the optical axis of the camera lens.
Present invention also offers a kind of method for changing light-source angle, for above-mentioned machine vision light supply apparatus, its
Comprise the following steps：
S1, the light angle for determining the machine vision light supply apparatus；
S2, the angular adjustment prism matched according to the light angle；
S3, the bottom that the angular adjustment prism is arranged on to the housing, and are located at the luminescent panel just
Lower section.
In the method for the change light-source angle of the present invention, the step S2 also includes：
S2-1, the boundary angle of the angular adjustment prism are x, and sin (x)=1/n, wherein n are the angular adjustment
The refractive index of prism；
S2-2, as a ﹤ x, the angular adjustment prism is refraction type prism, wherein, a be the ring light pass through the folding
The incident angle penetrated after the plane of refraction of formula prism；
S2-3, as a ' ﹥ x, the angular adjustment prism is reflective prism, wherein, a ' be the ring light pass through described in
Incident angle after the reflecting surface of reflective prism.
In the method for the change light-source angle of the present invention, also comprise the following steps；
S4, the machine vision are installed on camera lens with light supply apparatus；
S5, the optical axis direction along the camera lens, adjust between the angular adjustment prism and the luminescent panel
Distance.
Implement technical scheme, at least with following beneficial effect：The machine vision light supply apparatus is hanging down
On the basis of direct light line, the angular adjustment prism of deviation light is added so that the shooting angle of all light changes to identical
Angle, it is achieved thereby that the ring light of different light angles.And the angular adjustment prism of different angle can not only realize difference
The ring radiant of light angle, and the uniformity of original hot spot is not influenceed in the absence of the intersection of light during turnover light.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the machine vision light supply apparatus in one embodiment of the invention；
Fig. 2 is the structural representation of A-A sections in Fig. 1；
Fig. 3 is the structural representation of the machine vision light supply apparatus in another embodiment of the present invention；
Fig. 4 is the structural representation of B-B sections in Fig. 3；
Fig. 5 is the light path schematic diagram of the ring light in one embodiment of the invention；
Fig. 6 is the ring optical illumination angle schematic diagram in Fig. 5；
Fig. 7 is the light path schematic diagram of the ring light in another embodiment of the present invention；
Fig. 8 is the ring optical illumination angle schematic diagram in Fig. 5；
Fig. 9 is the flow chart of the method for the change light-source angle in one embodiment of the invention；
Figure 10 is the flow chart of the method for the change light-source angle in another embodiment of the present invention；
Wherein, 1, housing；11st, transmittance section；12nd, mounting hole；2nd, luminescent panel；31st, refraction type prism；32nd, reflective rib
Mirror；4th, the first face；5th, plane of refraction；6th, reflecting surface；7th, ring light；8th, horizontal line.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The embodiment of the present invention.
Fig. 1 to Fig. 8 shows a kind of machine vision light supply apparatus in the present invention, and Machine Vision Inspecting System is specific
For：Detected target is converted into by picture signal using CCD camera, special image processing system is sent to, according to picture
The information such as element distribution and brightness, color, it is transformed into digitized signal, image processing system carries out various computings to these signals to be come
Clarification of objective is extracted, such as area, quantity, position, length, further according to default permissibility and other conditions output result, is wrapped
Include size, angle, number, it is qualified/unqualified, with/without etc., realize automatic identification function.
Fig. 1 is the structural representation of the machine vision light supply apparatus in one embodiment of the invention.Fig. 2 is A-A in Fig. 1
The structural representation of section.Fig. 3 is the structural representation of the machine vision light supply apparatus in another embodiment of the present invention.Figure
4 be the structural representation of B-B sections in Fig. 3.Fig. 5 is the light path schematic diagram of the ring light in one embodiment of the invention.Fig. 6 is figure
Ring optical illumination angle schematic diagram in 5.Fig. 7 is the light path schematic diagram of the ring light in another embodiment of the present invention.Fig. 8 is Fig. 5
In ring optical illumination angle schematic diagram；
As shown in Figures 1 to 8, the machine vision includes housing 1, luminescent panel 2 and angular adjustment prism with light supply apparatus,
Housing 1 is generally standard component made of aluminum alloy materials, and certainly, housing 1 can also be made of other industrial materials.It is luminous
Panel 2 is arranged on the top of the housing 1, and angular adjustment prism is detachably arranged in the bottom of the housing 1, and angular adjustment rib
Mirror is located at the underface of luminescent panel 2, by the angular adjustment of the emergent ray of luminescent panel 2 to light angle.Specifically, should
Luminescent panel 2 includes at least row that arranges in a ring and encapsulates LED, and the light direction of luminescent panel 2 is towards angular adjustment rib
First face 4 of mirror, above-mentioned emergent ray are the ring light 7 perpendicular to the first face 4 of the angular adjustment prism.Also, refering to Fig. 1 and
Fig. 3, the thickness of the angular adjustment prism have diversity and removably changed, then the size of housing 1 and model be with
What the assembled height of overall luminescent panel 2 and angular adjustment prism matched, so as to meet that the angle of various models is adjusted
Save the replacing and installation of prism.
Referring again to Fig. 1 to Fig. 8, the angular adjustment prism typically may include refraction type prism 31 and reflective prism 32, but
The angular adjustment prism is also not excluded for other conventional lens, but changes the angle of the emergent ray of ring light 7 using lens, by
It is not same angulation change in the change to light, the uniformity of emergent light spot can be caused to be destroyed, and the angular error changed
Very big, the processing cost of special-shaped glass lens is also very high.And the prism by matching different angle can not only realize different illuminations
The effect of angle ring light 7, and the uniformity of original hot spot is not influenceed in the absence of the intersection of light during turnover light.Cause
This, the angular adjustment prism in the present invention preferably includes refraction type prism 31 and reflective prism 32.
As shown in Figure 5 to Figure 6, the angular adjustment prism may include refraction type prism 31 in a ring.Specifically, refering to figure
6, the light angle is c, and c=90 ° of+a-b, wherein, a is the entering after the plane of refraction 5 of the refraction type prism 31 of ring light 7
Firing angle degree, b are the shooting angle of the ring light 7 after the plane of refraction 5 of the refraction type prism 31.
As shown in Fig. 7 to Fig. 8, the angular adjustment prism may include reflective prism 32 in a ring.The light angle is
C ', and c '=- 90 ° of a '+b ', wherein, a ' is incident angle of the ring light 7 after the reflecting surface 6 of the reflective prism 32, b '
For shooting angle of the ring light 7 after the reflecting surface 6 of the reflective prism 32, i.e. a '=b '.
To sum up, the machine vision light supply apparatus adds the angular adjustment of deviation light on the basis of vertical light
Prism so that the shooting angle of all light changes to identical angle, it is achieved thereby that the ring light of different light angles.And
The angular adjustment prism of different angle can not only realize the ring radiant of different light angles, and light is not present during turnover light
The intersection of line, the uniformity of original hot spot is not influenceed.
In certain embodiments, the angular adjustment prism can along the distance on the optical axis direction of camera lens with the luminescent panel 2
Adjust.Luminescent panel 2 is fixed on the top of housing 1 typically by common fixed form, for example, being bonded or being spirally connected.
Angular adjustment prism ordinary circumstance is fixed on the bottom of housing 1 by common removably, and in order to meet angular adjustment
Prism is adjustable along the distance on the optical axis direction of camera lens with luminescent panel 2, can along the optical axis direction of camera lens on the madial wall of housing 1
Provided with the slideway slided up and down for angular adjustment prism, the cunning being engaged with the slideway is provided with the outside of the angular adjustment prism
Moving part, angular adjustment prism is same is detachably connected with this for the sliding part, so as to meet a secondary sliding part matching multiple angle
The customer demand of degree regulation prism.
What kind of no matter, it should be noted that using angular adjustment prism, it is for obtaining conventional annular light source
Light angle, 0 °, 30 °, 60 ° or 70 ° typically conventional of use of the light angle of annular light source etc..As long as it can meet above-mentioned annular
The angular adjustment prism of the light angle requirement of light source, within the scope of the present invention.
In certain embodiments, the middle part of the housing 1 enters the transmittance section of camera lens formed with the light reflected on workpiece
11, the transmittance section 11 is located on the optical axis of the camera lens.
Further, the side of the housing 1 is provided with least one pair of peace for being installed to the light supply apparatus on camera lens
Hole 12 is filled, a pair of mounting holes 12 are symmetric relative to the optical axis of the camera lens.
The method that Fig. 9 also show a kind of change light-source angle in the present invention, this method are mainly used in above-mentioned machine
Vision light supply apparatus.Fig. 9 is the flow chart of the method for the change light-source angle in one embodiment of the invention, as shown in figure 9,
It comprises the following steps：
S10, the light angle for determining the machine vision light supply apparatus；
S20, the angular adjustment prism matched according to the light angle；
S30, by the angular adjustment prism be arranged on the housing 1 bottom, and be located at the luminescent panel 2 just under
Side.
Further, step S2 also includes：
S2-1, the boundary angle of the angular adjustment prism are x, and sinx=1/n, wherein n are the angular adjustment prism
Refractive index；
S2-2, as a ﹤ x, the angular adjustment prism is refraction type prism 31, wherein, a be the ring light 7 pass through the refraction type
Incident angle after the plane of refraction 5 of prism 31；
S2-3, as a ' ﹥ x, the angular adjustment prism is reflective prism 32, wherein, a ' be the ring light 7 pass through the reflection
Incident angle after the reflecting surface 6 of formula prism 32.
Wherein, angle adjustment, effect and refraction are then carried out using reflection light when refraction angle is excessive to be totally reflected
It is just the same.
Figure 10 shows another method for changing light-source angle in the present invention, and this method is mainly used in above-mentioned machine
Vision light supply apparatus.Figure 10 be in another embodiment of the present invention change light-source angle method flow chart, such as Figure 10
Shown, it comprises the following steps：
S10, the light angle for determining the machine vision light supply apparatus；
S20, the angular adjustment prism matched according to the light angle；
S30, by the angular adjustment prism be arranged on the housing 1 bottom, and be located at the luminescent panel 2 just under
Side；
S40, the machine vision are installed on camera lens with light supply apparatus；
S50, the optical axis direction along the camera lens, adjust the distance between the angular adjustment prism and the luminescent panel 2.
It should be noted that the method for above-mentioned machine vision light supply apparatus and change light-source angle is except suitable for machine
Outside vision detection system, the machine vision can be also used for changing LED lamp with the method for light supply apparatus and change light-source angle
And the change of the light angle of other common furniture illuminations.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various changes, combination and change.Within the spirit and principles of the invention, made
Any modification, equivalent substitution and improvements etc., should be included within scope of the presently claimed invention.
Claims (8)
1. a kind of machine vision light supply apparatus, it is characterised in that including housing (1), luminescent panel (2) and angular adjustment rib
Mirror, the luminescent panel (2) are arranged on the top of the housing (1), and the angular adjustment prism is detachably arranged in described
The bottom of housing (1)；And the angular adjustment prism is located at the underface of the luminescent panel (2), by the luminescent panel
(2) angular adjustment of emergent ray is to light angle；The angular adjustment prism and light of the luminescent panel (2) along camera lens
Distance on direction of principal axis is adjustable.
2. machine vision light supply apparatus according to claim 1, it is characterised in that the luminescent panel (2) is including being in
At least row of annular arrangement encapsulates LED, and the light direction of the luminescent panel (2) is towards the first of the angular adjustment prism
Face (4), the emergent ray are the ring light (7) perpendicular to the first face (4) of the angular adjustment prism.
3. machine vision light supply apparatus according to claim 2, it is characterised in that the angular adjustment prism is including being in
The refraction type prism (31) of annular；
The light angle is c, and c=90 ° of+a-b, wherein, a is the ring light (7) by the refraction type prism (31)
Incident angle after plane of refraction (5), b are outgoing of the ring light (7) after the plane of refraction (5) of the refraction type prism (31)
Angle.
4. machine vision light supply apparatus according to claim 2, it is characterised in that the angular adjustment prism is including being in
The reflective prism (32) of annular；
The light angle is c ', and c '=- 90 ° of a '+b ', wherein, a ' is that the ring light (7) passes through the reflective prism
(32) the incident angle after reflecting surface (6), b ' are reflecting surface (6) of the ring light (7) by the reflective prism (32)
Shooting angle afterwards, i.e. a '=b '.
5. machine vision light supply apparatus according to claim 1, it is characterised in that the middle part of the housing (1) is formed
There is the transmittance section (11) that the light reflected on workpiece enters camera lens, the transmittance section (11) is located on the optical axis of the camera lens.
6. machine vision light supply apparatus according to claim 1, it is characterised in that the side of the housing (1) is set
Have at least one pair of mounting hole (12) for being installed to the light supply apparatus on camera lens, the pair of mounting hole (12) relative to
The optical axis of the camera lens is symmetric.
7. a kind of method for changing light-source angle, for the machine vision light supply apparatus described in any one of claim 2 to 4,
It is characterised in that it includes following steps：
S1, the light angle for determining the machine vision light supply apparatus；
S2, the angular adjustment prism matched according to the light angle；
S3, the bottom that the angular adjustment prism is arranged on to the housing (1), and are located at the luminescent panel (2)
Underface；
S4, the machine vision are arranged on camera lens with light supply apparatus；
S5, along the optical axis direction of the camera lens, adjust the distance between the angular adjustment prism and the luminescent panel.
8. the method according to claim 7 for changing light-source angle, it is characterised in that the step S2 also includes：
S2-1, the boundary angle of the angular adjustment prism are x, and sin (x)=1/n, wherein n are the angular adjustment prism
Refractive index；
S2-2, as a ﹤ x, the angular adjustment prism is refraction type prism (31), wherein, a be the ring light (7) pass through described in
Incident angle after the plane of refraction (5) of refraction type prism (31)；
S2-3, as a ' ﹥ x, the angular adjustment prism is reflective prism (32), wherein, a ' passes through institute for the ring light (7)
State the incident angle after the reflecting surface (6) of reflective prism (32).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510367466.XA CN104989998B (en) | 2015-06-29 | 2015-06-29 | Light source device for machine vision and method for changing light source angle |
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| CN201510367466.XA CN104989998B (en) | 2015-06-29 | 2015-06-29 | Light source device for machine vision and method for changing light source angle |
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| CN104989998A CN104989998A (en) | 2015-10-21 |
| CN104989998B true CN104989998B (en) | 2018-03-20 |
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| CN110657762A (en) * | 2019-09-25 | 2020-01-07 | 天津百利泰为科技有限公司 | Image acquisition device and method of system for visually detecting flatness of sheet-shaped object |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8475006B2 (en) * | 2006-08-02 | 2013-07-02 | Camtek Ltd. | Dark field illuminator and a dark field illumination method |
| CN202303013U (en) * | 2011-10-08 | 2012-07-04 | 宁波舒能光电科技发展有限公司 | Circular spot lamp |
| US9444985B2 (en) * | 2012-05-03 | 2016-09-13 | Semiconductor Components Industries, Llc | Reduced height camera modules |
| CN102980103A (en) * | 2012-11-27 | 2013-03-20 | 华南理工大学 | Machine vision LED (light emitting diode) illumination source |
| CN203671317U (en) * | 2013-12-20 | 2014-06-25 | 广州市雅江光电设备有限公司 | LED annular prism light source |
| CN203857408U (en) * | 2014-05-28 | 2014-10-01 | 浙江百康科技有限公司 | Multi-focus combination lens |
| CN104633597A (en) * | 2014-12-27 | 2015-05-20 | 芜湖赛特施工设备有限公司 | Lamplight reflection regulator |
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Effective date of registration: 20200601 Address after: No. 201, 301, 401, No. 2 workshop, auna group, Zhukeng community, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Ona Industrial Technology (Shenzhen) Co., Ltd Address before: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 seven floor Patentee before: O-NET AUTOMATION TECHNOLOGY (SHENZHEN) Co.,Ltd. |
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Address after: 518000 No. 201, 301, 401, No. 2 workshop, angna group, Zhukeng community, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Angshi intelligent (Shenzhen) Co.,Ltd. Address before: 518000 No. 201, 301, 401, No. 2 workshop, angna group, Zhukeng community, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee before: Ona Industrial Technology (Shenzhen) Co.,Ltd. |