CN209326940U - A kind of detection unit - Google Patents

Abstract

Whether the utility model is suitable for optics and electronic technology field, provides a kind of detection unit, damaged for detecting the optical element being arranged in an Optical devices.The Optical devices include light source and corresponding optical element.The detection unit includes detection illuminator, sensor and processor.The detection illuminator issues detection light beam to the measured optical unit.The optical characteristics of the sensor sensing through the reflected detection light beam of the measured optical unit.The processor is connected with sensor and the optical characteristics of detection light beam that is sensed according to sensor judges the measured optical unit with the presence or absence of flaw.

Description

A kind of detection unit

Technical field

The utility model belongs to optical technical field more particularly to a kind of detection unit.

Background technique

Existing three-dimensional (Three Dimensional, 3D) sensing mould group generallys use laser of the emitted energy compared with concentration Device projects sensing light pattern as light source, so the optics member that light source light emission side is used to form projection light pattern is once arranged in If breakage occurs in part, the laser of high-energy, which can shine directly on the eyes of user, to be damaged.

Summary of the invention

It, can be with the technical problem to be solved by the utility model is to provide a kind of detection unit, Optical devices and equipment Detect whether optical element that the Optical devices use is intact and light source is avoided directly to hurt user's eyes.

The utility model embodiment provides a kind of detection unit, for detecting the optical element being arranged in an Optical devices It is whether damaged.The Optical devices include light source and corresponding optical element.The detection unit includes detection illuminator, sensing Device and processor.The detection illuminator issues detection light beam to the measured optical unit.The sensor sensing is through by photometry The optical characteristics of the reflected detection light beam of element.The processor is connected with sensor and is sensed according to sensor The optical characteristics of detection light beam judge the measured optical unit with the presence or absence of flaw.

In some embodiments, the processor is connected with light source.If the optical characteristics and normalized optical that are sensed Characteristic is identical or difference value is in preset error range, then the processor judge the measured optical unit to be intact, it is described Processor keeps normal operating conditions by light source.If the measured optical unit is judged as there are flaw, the processor Close light source.

In some embodiments, the light source includes multiple illuminators.The part illuminator of the light source substitutes detection The function of illuminator issues the detection light beam, without separately setting detection illuminator.

In some embodiments, multiple illuminators of the light source divide into the floodlight for being used to form optical power detection The first illuminator of one or more of light beam and it is used to form one or more of the pattern beam that can project predetermined pattern A second illuminator.Second illuminator is formed in the middle part of the light source.First illuminator is centered around second and shines Body is symmetrical, wherein being located at outermost first illuminator for substituting detection illuminator to issue detection light beam.

In some embodiments, first illuminator and the second illuminator are formed on the same semiconductor base, And it is shone by independently control.

In some embodiments, first illuminator and the second illuminator are vertical cavity surface emitting laser.

In some embodiments, the detection unit further includes divergence element.The divergence element setting To expand the light emitting angle of second illuminator on the light-emitting surface of the second illuminator of a part for issuing detection light beam Greatly, detection light beam is enabled to cover entire the measured optical unit.

In some embodiments, plane identical with the light source of tested Optical devices is arranged in the detection illuminator On.

In some embodiments, the sensor is arranged in plane identical with the light source of tested Optical devices.

Detection unit provided by the utility model embodiment is by comparing the optical characteristics of the measured optical unit with side Just the integrity degree of optical element used in Optical devices is detected, to prevent light source from appearing from the flaw of optical element And the eyes of user are damaged.

The additional aspect and advantage of the utility model embodiment will be set forth in part in the description, partially will be under Become obvious in the description in face, or is recognized by the practice of the utility model embodiment.

Detailed description of the invention

Fig. 1 is the optics module that the detection unit that the utility model first embodiment provides and third embodiment provide Structural schematic diagram.

Fig. 2 is the structural schematic diagram for the detection unit that the utility model second embodiment provides.

Fig. 3 is the structural schematic diagram of light source described in Fig. 2.

Fig. 4 is the structural schematic diagram for the optics module that the 4th embodiment of the utility model provides.

Fig. 5 is the structural schematic diagram for the sensing device that the 5th embodiment of the utility model provides.

Fig. 6 is the structural schematic diagram for the equipment that the utility model sixth embodiment provides.

Fig. 7 is a kind of step flow chart of detection method provided by the utility model.

Specific embodiment

The embodiments of the present invention is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the utility model, and should not be understood as practical to this Novel limitation.In the description of the present invention, it should be understood that term " first ", " second " are only used for describing, without It can be interpreted as indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic or put in order.By This defines " first ", the technical characteristic of " second " can explicitly or implicitly include one or more technology Feature.The meaning of " plurality " is two or more in the description of the present invention, unless otherwise clearly specific limit It is fixed.

In the description of the present invention, it should be noted that unless otherwise specific regulation or limiting, term " peace Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integration Connection；It can be mechanical connection, be also possible to be electrically connected or be in communication with each other；It can be directly connected, intermediate matchmaker can also be passed through Jie is indirectly connected, and can be the connection inside two elements or the interaction relationship between two elements.For this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

Following disclosure provides many different embodiments or example is used to realize the different structure of the utility model. In order to simplify the disclosure of the utility model, hereafter only to the component of specific examples and being set for describing.Certainly, they are only Example, and purpose does not lie in limitation the utility model.In addition, the utility model can reuse reference in different examples Number and/or reference letter, this reuse are to simplify and clearly state the utility model, itself does not indicate institute The particular kind of relationship between various embodiments and/or setting discussed.In addition, the utility model is provided in the following description Various specific techniques and material are only the example for realizing technical solutions of the utility model, but those of ordinary skill in the art answer This recognizes that the technical solution of the utility model can also be by other techniques for not describing hereafter and/or other materials come real It is existing.

Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner In formula.In the following description, many details are provided so as to fully understand the embodiments of the present invention.So And one of ordinary skill in the art would recognize that, even if without one or more in the specific detail, or using other knots Structure, constituent element etc. can also practice the technical solution of the utility model.In other cases, it is not shown in detail or describes known knot Structure or operation to avoid fuzzy the utility model emphasis.

As shown in Figure 1, the utility model first embodiment provides a kind of detection unit 1, for detecting an optical mode Whether the optical element 12 being arranged in group 10 is damaged.The optics module 10 includes light source 12 and corresponding optical element 14.Institute The light beam for stating the sending of light source 12 forms the light beam with specific function after the modulation of optical element 14 and projects away.The light Learning element 14 includes but is not limited to collimating element, beam-expanding element and diffraction optical element (Diffractive Optical One of Elements, DOE) and combinations thereof.

In the present embodiment, the optics module 10 is the three-dimensional sensing dress for sensing measured target object three-dimensional data It sets.The light beam can be the light beam with specific wavelength according to sensing principle and application scenarios.For example, can be infrared or close Infrared light.

The detection unit 1 includes detection illuminator 100, sensor 102 and processor 104.The detection illuminator 100 Issue the detection light beam for detecting optical element 14.The detection beam emissions detect the light to the measured optical unit 14 Learn the integrality of element 14.The dispersion angle of detection the issued light beam of illuminator 100 is larger to cover entire optical element 14.The setting position of the detection illuminator 100 is not particularly limited, if what the detection illuminator 100 was issued Light beam is towards optical element 14 and can cover entire the measured optical unit 14.In the present embodiment, the detection hair Body of light 100 is light emitting diode (Light-Emitting Diode, LED).Hair of the LED light source compared to VCSEL light source It is big to dissipate angle.The detection illuminator 100 is arranged in plane identical with the light source 12 of tested optics module 10.The inspection The characteristic for surveying the detection light beam that illuminator 100 is issued is not particularly limited, as long as can be reflected and be felt by optical element 14 It measures, can be ultraviolet light, visible or infrared light etc..It is understood that can also be according to the material of optical element 14 Material and surface shape select the wavelength of the detection light beam so that the reflectivity of 14 pairs of optical element detection light beams is maximum Change.

The sensor 102 is used to sense the optical characteristics through the reflected detection light beam of the measured optical unit 14.If The optical element 14 is perfect, then the reflection case of 14 pairs of optical element detection light beams is consistent, therefore described The optical characteristics for the detection light beam that sensor 102 is sensed remains unchanged.If there is flaw, institute on the optical element 14 State optical element 14 occur flaw position will affect to detection light beam reflection so that the sensor 102 was sensed The optical characteristics of detection light beam changes.The setting position of the sensor 102 is not particularly limited, as long as the sense Surveying device 102 can receive through the reflected detection light beam of the measured optical unit 14.

The optical characteristics refers to different attribute relevant to light, including but not limited to the intensity of light, wavelength, brightness, Energy distribution one of is formed by pattern and combinations thereof.The sensor 102 is according to the difference of the optical characteristics sensed Classification can include but is not limited to one of photodiode, photometer and imaging sensor and combinations thereof.

In the present embodiment, the sensor 102 is arranged in plane identical with the light source of tested optics module 10. The sensor 102 and detection illuminator 100 are symmetrical to keep mutual as far as possible about the light source 12 of tested optics module 10 The distance between, the sensor 102 can be made to reduce it when sensing is by 14 reflected detection light beam of optical element It is influenced by detection the luminous of illuminator 100.

It is understood that if the tested optics module 10 includes multiple optical elements 14, the sensor 102 What is sensed is that the reflected each secondary reflection light beam of each of the multiple optical element 14 optical element 14 is folded Optical characteristics after adding.There are the optics that flaw can be embodied in overall reflective light beam is special for any one optical element 14 In the variation of property.

The processor 104 is connected with sensor 102, the light of the detection light beam for being sensed according to sensor 102 Characteristic is learned to judge whether optical element 14 detected is complete.For example, prestoring the measured optical unit in the processor 104 Normalized optical characteristic under 14 fine status.The processor 104 is anti-through the measured optical unit 14 by the detection light beam sensed Optical characteristics after penetrating is compared with the normalized optical characteristic of the optical element 14.If the optical characteristics and standard that are sensed Optical characteristics is identical or difference value is in preset error range, then the processor 102 judges the measured optical unit to be intact 's.If the difference value of the optical characteristics sensed and normalized optical characteristic exceeds error range, the processor 104 judges quilt There are flaws for photometry element.

It is understood that the processor 104 can also be connected with the light source 12 of the optics module 10, with basis Above-mentioned judging result controls opening or closing for the light source 12.If the processor 104 judges the optical element 14 and is Intact, then allow the light source 12 to keep normal operating conditions.If the processor 104 judges the optical element 14, there are the flaws Defect, the then luminous energy for closing the light source 12 or the decrease light source pass through optics member to avoid the high-energy light beam of light source 12 Flaw on part 14 hurts the eyes of user.

It is understood that the processor 104 can be set inside the optics module 10, also can be set in light It learns outside mould group 10, for example is located in the equipment configured with the optics module 10.The processor 104 can pass through circuit trace Or the mode and the sensor 102 realization connection of wireless transmission.

As shown in Figures 2 and 3, the utility model second embodiment provides a kind of detection unit 2, implements with first Detection unit 1 in mode is essentially identical, and the main distinction is that the light source 22 of the optics module 20 includes multiple illuminators 226 With 228, the part illuminator 226 or 228 of the light source 22 is detection illuminator to send out towards the measured optical unit 24 by dual-purpose Light beam is detected out, therefore does not need separately to set special detection illuminator.

In the present embodiment, the optics module 20 is used to sense the three-dimensional data of measured target object.The light source 22 Including the first emission part 220 and the second emission part 222.It is equal that first light beam of the sending of first emission part 220 is used to form light intensity The flood beam of even distribution.The flood beam is projected on measured target object for sensing the floodlight image of measured target object. For example, the flood beam can be used for sensing whether the measured target object is face.Second emission part 222 issue the Two light beams are used to form the pattern beam that predetermined pattern can be projected on measured target object.The predetermined pattern can be used for Sense the three-dimensional information of the measured target object.

First emission part 220 and the second emission part 222 are formed on the same semiconductor base 224 or are connected with each other To be integrated into overall structure.The first light emitting region positioned at 224 middle part of semiconductor base is defined on the semiconductor base 224 221 and around first light emitting region 221 setting the second light emitting region 223.

In the present embodiment, first emission part 220 includes multiple for emitting the first illuminator of the first light beam 226.Second emission part 222 includes multiple for emitting the second illuminator 228 of the second light beam.First illuminator 226 and second illuminator 228 be formed on the same semiconductor base 224.First illuminator 226 is in semiconductor base It is uniformly distributed in 224 the second light emitting region 223 according to preset same intervals.Second illuminator 228 is partly led described Irregular distribution in first light emitting region 221 of body substrate 224.

First illuminator 226 and the second illuminator 228 can be semiconductor laser.Preferably, in this embodiment party In formula, first illuminator 226 and the second illuminator 228 are vertical cavity surface emitting laser (Vertical Cavity Surface Emitting Laser, VCSEL), it is made up on the semiconductor base 224 of the techniques such as photoetching and etching. The pattern beam that the flood beam and the second illuminator 228 that first illuminator 226 issues issue is that wavelength is identical red Outer or near infrared light, wave-length coverage are 750nm to 1650nm.

First light emitting region 221 positioned at 224 middle part of semiconductor base is rectangle.Second light emitting region 223 It is correspondingly arranged at four edges of the first light emitting region 221.First illuminator 226 in the second light emitting region 223 four A corner is uniformly arranged multilayer along two sides of each corner in the second light emitting region 223 according to same intervals, and described first Light emitting region 221 is four right angle frames for enveloping 102 each right angle of the first light emitting region that dotted line described in Fig. 3 surrounds Bar-shaped zone.Second illuminator 228 is irregularly arranged in the first light emitting region 221, has irregular point for issuing Second light beam of cloth pattern.

It is provided on the semiconductor base 224 and connect with external circuit for controlling in first light emitting region 221 Light the first pad 225.Be provided on the semiconductor base 224 connect with external circuit it is described for controlling Second pad 227 of the light in the second light emitting region 223.So being located at the first light emitting region in present embodiment The second illuminator 228 in 221 and the first illuminator 226 in the second light emitting region 223 can pass through different control Signal independently works.

In the present embodiment, the first illuminator of part 226 in the light source 22 is used for issuing detection light beam, definition To be multiplexed illuminator 2261.The multiplexing illuminator 2261 can be preferentially selected as positioned at the second light emitting region 223 outermost one Enclose the second illuminator 226.What is issued by itself as the VCSEL of light source 22 is the higher laser of concentration degree, in order to improve Detect light beam dispersion angle and reduction may due to leaking caused by injury, the detection unit 20 further includes corresponding described multiple The divergence element 206 being arranged with illuminator 2261.The divergence element 206 is used to be multiplexed the hair of illuminator 2261 Angular expands so that detection light beam can cover entire the measured optical unit 24.The divergence element 206 can be with For microlens array, it is correspondingly arranged on the light-emitting surface of the multiplexing illuminator 2261.

As depicted in figs. 1 and 2, the utility model third embodiment provides a kind of optics module 10, detectable to be made The integrality of optical element 14.The optics module 10 includes light source 12, optical element 14 and such as above-mentioned first and second Detection unit 1 or 2 provided by embodiment.The light that the light source 12 issues is formed after the modulation of optical element 14 to be had The light beam of specific function.The detection unit 1 or 2 is used to detect the integrality of the optical element 14.

In the present embodiment, the optical element 14 includes DOE140 and collimation lens 142.The light source 12 is issued Light got on DOE140 after the collimation of collimation lens 142, with formed by DOE140 light intensity uniform distribution it is general Light light beam and/or the pattern beam that predetermined pattern can be projected.The optical path of the optics module 10 is along the same direction, the light The optical axis of source 12 and optical element 14 overlaps and extends along the same direction.

As shown in figure 4, the 4th embodiment of the utility model provides a kind of optics module 40, with third embodiment In optics module 10 it is essentially identical, the main distinction is the optical path of the optics module 40 through overshoot, 42 edge of light source Y is projected away the light beam that first direction X is issued in a second direction after overshoot.

In the present embodiment, the optical element 44 includes optical path-deflecting part 441 and DOE440.The optical path-deflecting part 441 include the incident side 4410 set gradually along optical path, reflecting surface 4412 and light emission side 4413.The light source is arranged in incident side 4410, to shine along first direction X towards optical path-deflecting part 441.The light beam retrodeviates through the reflection of reflecting surface 4412 and goes to second Direction Y is simultaneously projected on the DOE440 that light emission side 4413 is arranged in.The optical path-deflecting part 441 can be reflecting prism or reflection Plane mirror.

It is understood that the optical element 44 can also include having collimating element and/beam-expanding element.The collimation Element and/or beam-expanding element can be correspondingly arranged at the incident side 4410 or light emission side 4413 of optical path-deflecting part 441, or may be used also It collimates and expands to be formed to have directly on 4413 surface of 4410 surface of incident side or light emission side of the optical path-deflecting part 441 The optical texture of function.

As shown in figure 5, the 5th embodiment of the utility model provides a kind of sensing device 50, it is used to sense measured target The three-dimensional information of object.The spatial information includes but is not limited to the three-dimensional information on measured target object surface, measured target object in sky Between in location information, the dimension information etc. of measured target object other 3 D stereo information relevant to measured target object.Felt The spatial information of the measured target object measured can be used for identifying measured target object or construct the 3 D stereo mould of measured target object Type.

The sensing device 50 includes the optics module 10 as provided by above-mentioned third to four embodiments and sensing mould group 52. The optics module 1 carries out sensing identification for projecting in particular beam to measured target object.The sensing mould group 52 is for feeling It surveys the specific image that the optics module 1 projects on measured target object and is sensed by analyzing the specific image by mark Object correlation space information.

In the present embodiment, the sensing device 52 is to sense the three-dimensional information on measured target object surface and identify accordingly The 3D face authentification device of measured target object identity.

As shown in fig. 6, the utility model sixth embodiment provides a kind of equipment 60, for example, it is mobile phone, laptop, flat Plate computer, touch-control interaction screen, door, the vehicles, robot, automatic numerical control lathe etc..The equipment includes that at least one is above-mentioned Sensing device 50 provided by 5th embodiment.In the present embodiment, the sensing device 50 is used in measured target object On project default light pattern to sense the three-dimensional data of measured target object.The equipment 60 is used for according to the sensing device 50 Sensing result executes corresponding function to correspond to.The corresponding function includes but is not limited to unlock after identifying user's identity, branch It pays, start the feelings for utilizing depth learning technology to judge user after preset application program, avoidance, identification user's countenance Any one or more in thread and health condition.

As shown in fig. 7, the utility model also provides a kind of optics using in the detection unit 1 detection optics module 10 The detection method of 14 integrity degree of element, the optics module include light source and above-mentioned optical element.The detection method includes such as Lower step:

Step S01 issues detection light beam and irradiates entire the measured optical unit.The detection light beam request dispersion angle is enough Greatly, entire the measured optical unit is completely covered.In the present embodiment, the detection light beam is infrared or near infrared light, wave Long range is 750nm to 1650nm.

The detection light beam can be issued by the biggish LED of dispersion angle.The detection light beam can also relatively be collected by shining In semiconductor laser, such as: VCSEL issues, then cooperates diverging optical element larger to cover to meet beam divergence angle The requirement of the measured optical unit is covered.

Step S02, the optical characteristics for the detection light beam that sensing is reflected via the measured optical unit.The detection light beam irradiation To optical element, a part of detection light beam can be reflected by optical element.According to the refraction and principle of reflection of light, institute The case where stating reflected detection light beam is by factors such as the surface shape and material of the measured optical unit and detection light beam wavelengths And it determines.Therefore, if the measured optical unit is in the presence of that the flaws such as crack or mark of break can change reflected detection light beam, It can determine whether out whether the measured optical unit is damaged by the reflected optical characteristics of optical element by analysis detection light beam.

It is understood that the wave of detection light beam can also be may be selected according to the material and surface shape of the measured optical unit It is long, to improve the measured optical unit to the reflectivity of detection light beam.

Step S03 compares the optical characteristics of sensed the measured optical unit and the standard of preset intact optical element Whether optical characteristics is in preset error range.It is understood that if the tested optics module 10 includes multiple light Element 14 is learned, then the optical characteristics sensed is reflected by each of the multiple optical element 14 optical element 14 The optical characteristics of each secondary detection light beam be formed by stacking.The optical element 14 includes but is not limited to collimating element, expands One of element, DOE and combinations thereof.

Step S04, if the normalized optical characteristic of the optical characteristics of the measured optical unit sensed and intact optical element Identical or difference value then judges the measured optical unit to be intact in preset error range.

Step S05, if the difference value of the optical characteristics sensed and normalized optical characteristic exceeds preset error range, The processor judges the measured optical unit, and there are flaws.

Step S06 allows the light source to keep normal operating conditions if the optical element is judged as intact.

Step S07, if the optical element is judged as closing the light source there are flaw or turning down the light source Luminous energy hurts by the flaw on optical element the eyes of user to avoid the high-energy light beam of light source.

Compared with existing optics module, detection unit, optics module, equipment and detection side provided by the utility model Method detects the whether damaged light to prevent the light source of optics module from being issued of the optical element in optics module in which can be convenient Through optical element breakage direct irradiation user's eyes and the injury that may cause.

In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this explanation In book, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.

The foregoing is merely the better embodiments of the utility model, are not intended to limit the utility model, it is all It is practical new to should be included in this for made any modifications, equivalent replacements, and improvements etc. within the spirit and principles of the utility model Within the protection scope of type.

Claims (13)

1. whether a kind of detection unit, damaged for detecting the optical element being arranged in an Optical devices, the Optical devices packet Light source and corresponding optical element are included, the detection unit includes detection illuminator, sensor and processor, and the detection shines Body issues detection light beam to the measured optical unit, and the sensor sensing is through the reflected detection light beam of the measured optical unit Optical characteristics, the processor is connected with sensor and the optical characteristics of detection light beam that is sensed according to sensor is sentenced Disconnected the measured optical unit whether there is flaw.

2. detection unit as described in claim 1, which is characterized in that the processor is by the measured optical unit sensed Optical characteristics is compared with the normalized optical characteristic under the measured optical unit fine status prestored, and in the optics sensed The difference value of characteristic and normalized optical characteristic judges the measured optical unit when exceeding error range, and there are flaws.

3. detection unit as claimed in claim 2, which is characterized in that if the optical characteristics sensed and normalized optical characteristic phase With or difference value in preset error range, then the processor judges the measured optical unit to be intact.

4. detection unit as claimed in claim 3, which is characterized in that the processor is connected with light source, the processor Light source is allowed to keep normal operating conditions, if the measured optical unit is judged as there are flaw, the processor closes light Source or the luminous energy for retrieving light source.

5. detection unit as described in claim 1, which is characterized in that the light source includes multiple illuminators, the detection hair Body of light is a part of illuminator of the light source.

6. detection unit as claimed in claim 5, which is characterized in that multiple illuminators of the light source, which are divided into, to be used to form It the first illuminator of one or more of the flood beam of optical power detection and is used to form and can project predetermined pattern The second illuminator of one or more of pattern beam, second illuminator are formed in the middle part of the light source, first hair It is symmetrical that body of light is centered around the second illuminator, a portion be located at outermost first illuminator for substitute detection it is luminous Body issues detection light beam.

7. detection unit as claimed in claim 6, which is characterized in that first illuminator and the second illuminator are formed in together On one semiconductor base, and shone by independently control.

8. the detection unit as described in any one of claim 6 to 7, which is characterized in that first illuminator and second Illuminator is vertical cavity surface emitting laser.

9. detection unit as claimed in claim 6, which is characterized in that the detection unit further includes divergence element, institute Divergence element is stated to be arranged on the light-emitting surface of the second illuminator of a part for issuing detection light beam with by described second The light emitting angle of illuminator expands, and detection light beam is enabled to cover entire the measured optical unit.

10. detection unit as described in claim 1, which is characterized in that the detection illuminator setting is filled with by photometry In the identical plane of the light source set.

11. detection unit as described in claim 1, which is characterized in that the sensor is arranged in and tested Optical devices In the identical plane of light source.

12. detection unit as described in claim 1, which is characterized in that the optical characteristics of the detection light beam includes the strong of light Degree, wavelength, brightness, Energy distribution, any one or the combination of several of them being formed by pattern.

13. detection unit as described in claim 1, which is characterized in that the detection illuminator includes light emitting diode.