CN207636764U - A kind of more light path chambers and detection device - Google Patents
A kind of more light path chambers and detection device Download PDFInfo
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Abstract
This application involves a kind of more light path chambers, detection devices.A kind of more light path chambers, including：The annular microscope group that incident light is projected after multiple reflections from entrance aperture, the annular microscope group includes one or two annular sphere mirror, the entrance aperture is opened on one of annular microscope group annular sphere mirror, and the reflecting surface of the annular sphere mirror is on its inside wall.A kind of detection device, including more light path chambers.Pass through the cooperation of annular sphere mirror and entrance aperture and incidence angle, so that incident ray is in positive multi-corner star-shape in more light path intracavitary and is projected along former entrance aperture, under the premise of reducing engaged test place, it simulates optical distance measurement apparatus to be measured and sends out incident ray directive test target, and receive the test environment of the transmitting light after reflection with smaller acceptance angle.
Description
Technical field
This application involves radar quality testing check and correction technical field more particularly to a kind of more light path chambers, detection device and inspections
Survey method.
Background technology
Currently, the test of the longer range radar of range (range is up to tens of to up to a hundred rice), mainly indoors or room
Outer to find corresponding long range test site, major defect has two：1, it needs to find the larger spacious field of floor space every time
Ground carries out, and increases test required time, energy；2, for different product batches, the survey of the test space of larger area
Strip part is it is difficult to ensure that unanimously, be not easy to the test and evaluation being standardized to range radar；3, it is difficult control sunshine, gas
The environmental conditions such as temperature, water mist, are highly detrimental to industrialized production；4, the test-strips for differing larger with outdoor environment can not be simulated
Part.
Utility model content
The purpose of the application is to propose a kind of more light path chambers, passes through annular sphere mirror and entrance aperture and incident angle
Cooperation so that incident ray, in positive multi-corner star-shape and along the injection of former entrance aperture, is reducing engaged test place in more light path intracavitary
Under the premise of, it simulates optical distance measurement apparatus to be measured and sends out transmitting light directive test target and receive the transmitting light after reflection
Test environment.
The purpose of the application is to propose a kind of detection device, be realized in smaller survey by more light path chambers and driving device
It tries in space, treats the detection that photometry range unit carries out long range, easy to operate, test is accurate.
The purpose of the application is to propose a kind of detection method, and the survey of optical distance measurement apparatus to be measured is adjusted by driving device
Angle of incidence of light is tried, realizes that the difference that test light is carried out in more light path intracavitary is long away from measurement, had both reduced the space of test
The difficulty of test is reduced again.
For this purpose, the application uses following technical scheme：
A kind of more light path chambers, including：The annular microscope group that incident light is projected after multiple reflections from entrance aperture, it is described
Annular microscope group includes one or two annular sphere mirror, and the entrance aperture is opened in one of annular microscope group annular sphere mirror
On, the reflecting surface of the annular sphere mirror is on its inside wall.
As one of the preferred embodiments of the present invention, more light path chambers include an annular sphere mirror, the annular
Spherical mirror is symmetrical above and below along the horizontal plane where entrance aperture, and the line of entrance aperture and the centre of sphere of annular sphere mirror where it is incidence
Radius R, then the angle of incident ray and incident radius is incidence angle θ, and incident ray is positive P in the ray trajectory of more light path intracavitary
When the star of angle, optical length L of the incident ray in more light path intracavitary1=(4k+3) * 2Rcos θ, wherein P=4k+3, P are incident light
Line is in the number of edges that more light path intracavitary are in positive multi-corner star-shape ray trajectory, θ=π/(8k+6).
As one of the preferred embodiments of the present invention, more light path chambers are superimposed symmetrically arranged ring including about two
Shape spherical mirror, the entrance aperture are located therein on any one annular sphere mirror, and light is from after entrance aperture injection described in two
It is the positive star-shaped ray trajectory in the angles P that vertical view is respectively formed in annular sphere mirror and between two annular sphere mirrors；
The line of entrance aperture and the centre of sphere of annular sphere mirror where it is incident radius, then incident ray and incident radius
Angle is incidence angle θ, and θ=π/(8k+6), optical length L of the incident ray in more light path intracavitary2=3* (4k+3) * 2Rcos θ, P
=4k+3, wherein k are the positive integer more than or equal to 1.
As one of the preferred embodiments of the present invention, the centre of sphere of two annular sphere mirrors is symmetrically distributed in incident light
Line in two annular sphere mirrors between being formed by two flare layers.
As one of the preferred embodiments of the present invention, the height of the annular sphere mirror is H, the annular sphere mirror
The height H of the centre of sphere2=3H/4, the height H of the entrance aperture1The distance c of=H/2, the centre of sphere of two annular sphere mirrors are H/
2。
As one of the preferred embodiments of the present invention, incident ray is from after entrance aperture injects corresponding annular sphere mirror,
It is the focus of the annular sphere mirror at the midpoint of each reflected ray of more light path intracavitary, the focal length of the annular sphere mirror is
F=R*cos θ.
As one of the preferred embodiments of the present invention, incident ray from after entrance aperture incidence in two annular spheres
The spacing being formed by mirror between two flare layers is c, 0 c/R≤1/60 ＜.
As one of the preferred embodiments of the present invention, it is provided in front of the entrance aperture for assembling incident ray
Focusing optic, incident ray inject corresponding annular sphere mirror, incident ray through the focusing optic from entrance aperture
The midpoint of tangent line in aforementioned toroidal spherical mirror is the focus of the focusing optic.
As one of the preferred embodiments of the present invention, the focusing optic be condenser lens or focusing mirror,
The optical axis of the condenser lens is overlapped with incident ray.
As one of the preferred embodiments of the present invention, the inside radius of the annular sphere mirror is R, and outer radius R ' enters
The beam radius for penetrating light is r, then diameter a ＞ 2r+ (R '-R) * sin θs of entrance aperture.
A kind of optical detection apparatus, including more light path chambers, and with more light path chambers or optical distance measurement apparatus phase to be measured
The driving device of connection, the driving device drive more light path chambers or optical distance measurement apparatus to be measured rotation to change incidence angle, institute
Optical distance measurement apparatus to be measured is stated using the incidence angle that each sets as detection point, corresponding each detection point records light to be measured
It learns measurement distance of the incident ray that is sent out of range unit after excessive light path chamber and is compared with the actual distance of incident ray.
As one of the preferred embodiments of the present invention, it in the input path of the optical distance measurement apparatus to be measured and/or connects
It receives and is provided with attenuator in light path.
As one of the preferred embodiments of the present invention, the optical distance measurement apparatus to be measured includes being used for emission measurement light
Transmitting light source and pick-up probe for receiving the emergent ray being emitted from more light path chambers, the transmitting light source and receiving visit
The distance for surveying device is d, and the incident ray is vertical with transmitting light source and the line of pick-up probe, the center of the condenser lens
With at a distance from the transmitting light source of range unit to be measured be s1, the center of the condenser lens is s at a distance from entrance aperture2, it is described go out
It is s to penetrate light and inject to the distance of detector from entrance aperture3, the s2=f-Rcos θ, the s1=(Rcos θ cos (2 θ)+
s2) * m/ (Rcos θ sin (2 θ)), s3=d/arctan (d/ (s1+s2)), when more light path chambers include an annular sphere mirror, then
The actual distance A=s of incident ray1+s2+s3+L1。
As one of the preferred embodiments of the present invention, the optical distance measurement apparatus to be measured includes for emitting incident ray
Transmitting light source and pick-up probe for receiving the emergent ray being emitted from more light path chambers, the incident ray and transmitting light
The line of source and pick-up probe is vertical, and the distance of the transmitting light source and pick-up probe is d, the range unit to be measured
It is s at a distance from the pip of focusing mirror to emit light source1, the pip of the focusing mirror is at a distance from entrance aperture
s2, the distance that the emergent ray injects to detector from entrance aperture is s3, the s2=f-Rcos θ, the s1=(Rcos θ
cos(2θ)+s2) * m/ (Rcos θ sin (2 θ)), s3=d/arctan (d/ (s1+s2)), when light path chamber includes two annular spheres
When mirror, then the actual distance A=s of incident ray1+s2+s3+L2。
A kind of detection method is treated photometry range unit using the detection device and is detected, and specific steps are such as
Under：
Step 1: the position of optical distance measurement apparatus to be measured or more light path chambers is adjusted by driving device, to set different angles
The incidence angle of degree is as detection point；
Step 2: optical distance measurement apparatus to be measured sends out incident ray in each detection point set carries out ranging, and
Output measurement distance corresponding with each detection point measures light intensity；
Step 3: the measurement distance and actual distance or measurement light intensity and actual distance to each detection point carry out
It compares, to judge whether optical distance measurement apparatus to be measured is qualified.
As one of the preferred embodiments of the present invention, further include step 4：According to each detection point measurement away from
From with actual distance or measure the result that light intensity and actual distance are compared treat photometry range unit be modified and
Compensation.
Pass through the cooperation of annular microscope group and entrance aperture and incidence angle so that incident ray is in more light path intracavitary in just polygonal
Star and along former entrance aperture project, under the premise of reducing engaged test place, simulate optical distance measurement apparatus to be measured and send out
It penetrates light directive test target and receives the test environment of the transmitting light after reflection, the light of further control test, temperature
The parameters such as degree so that test data is more accurate and reliable.
Description of the drawings
Fig. 1 is the vertical view for more light path chambers that the application specific implementation mode 1 provides；
Fig. 2 is the front view for more light path chambers that the application specific implementation mode 1 provides；
Fig. 3 is the structure chart for more light path chambers that the application specific implementation mode 2 provides；
Fig. 4 is the vertical view of the annular sphere mirror for more light path chambers that the application specific implementation mode 2 provides：
Fig. 5 is the front view of the annular sphere mirror for more light path chambers that the application specific implementation mode 2 provides：
Fig. 6 be the application specific implementation mode 2 provide incident ray more light path intracavitary ray trajectory schematic diagram；
Fig. 7 is the knot using condenser lens as focusing optic detection device that the application specific implementation mode 1 provides
Composition；
Fig. 8 is the offer of the application specific implementation mode 1 using focusing mirror as focusing optic detection device
Structure chart；
Fig. 9 is the knot using condenser lens as focusing optic detection device that the application specific implementation mode 2 provides
Composition；
Figure 10 is the offer of the application specific implementation mode 2 using focusing mirror as focusing optic detection device
Structure chart.
1, annular sphere mirror；2, entrance aperture；4, attenuator；11, entrance aperture；12, the centre of sphere；21, emit light source；22, it detects
Device；31, condenser lens；32, focusing mirror.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, technical solutions in the embodiments of the present application are clearly and completely described, it is clear that described embodiment is only
The embodiment of the application part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model of the application protection
It encloses.
In addition, term " comprising " and " having " and their any deformation, it is intended that it includes example to cover non-exclusive
Such as, process, method, system, product or the equipment for containing series of steps or unit those of are not necessarily limited to clearly to list
Step or unit, but may include not listing clearly or for intrinsic other of these processes, method, product or equipment
Step or unit.
Further illustrate the technical solution of the application below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
This application provides a kind of more light path chambers, as shown in Figs. 1-2, including：Incident ray is entered certainly after multiple reflections
The annular microscope group that perforation 11 projects, the annular microscope group includes an annular sphere mirror 1, and the entrance aperture 11 is opened in annular ball
On face mirror 1, the annular sphere mirror 1 is symmetrical above and below along the horizontal plane where entrance aperture 11, the reflecting surface of the annular sphere mirror 1
On its inside wall, the line of the entrance aperture 11 and the centre of sphere 12 of annular sphere mirror 1 where it is incident radius R, then enters
The angle for penetrating light and incident radius is incidence angle θ, and incident ray is the positive angles P star in the ray trajectory of more light path intracavitary, is entered
Penetrate light more light path intracavitary optical length L1=(4k+3) * 2Rcos θ, wherein P=4k+3, P are incident ray in more light path chambers
The number of edges of interior be in positive multi-corner star-shape ray trajectory, θ=π/(8k+6), wherein k are the positive integer more than or equal to 1.Pass through annular
The cooperation of spherical mirror 1 and entrance aperture 11 and incident angle so that incident ray is in more light path intracavitary ray trajectories in just polygonal
Star and along former entrance aperture 11 project, under the premise of reducing engaged test place, simulate range unit to be measured and send out transmitting
Light directive test target and the test environment for receiving the transmitting light after reflection, the further illumination for controlling test environment,
The parameters such as temperature so that test data is more accurate and reliable.
In order to ensure to be reflected again after the reflection of incident ray after injecting annular sphere mirror 1 each time all focuses again, protect
The light intensity of reflection light is demonstrate,proved, the focal length of the annular sphere mirror 1 is F=R*cos θ, this allows for incident ray in more light path chambers
The midpoint of interior each reflected ray is the focus of the annular sphere mirror 1, and it is each in more light path intracavitary to have reached incident ray
Secondary reflection all focuses again, and incident ray cycle in annular sphere mirror 1 occurs reflection, focuses, reflection, until from entrance aperture 11
It projects.
When it is implemented, can be according to the value model for determining incidence angle θ to the light path value range set by more light path chambers
It encloses, and takes intermediate value with numerical value that the focal length of the determination annular sphere mirror 1 is F=R*cos θ according to the value range of incidence angle θ；
Or also some or several most common numerical value or mean value can be specified to bring annular sphere into according in the value range of incidence angle θ
The focal length of mirror 1 is the calculation formula of F=R*cos θ, obtains the value of annular sphere mirror 1.
By taking the value range of incidence angle θ is less than or equal to π/14, is more than 0 as an example, the value range of cos θ, which is greater than, to be equal to
0.97437, it is less than 1；Namely as the angle of θ constantly becomes smaller, the value of cos θ is substantially equal to 1, that is, annular ball
The focal length of face mirror 1 is substantially equal to R, and in test, in order to obtain longer light path, the value of θ will value it is the smaller the better,
Therefore make when, the focal length of annular sphere mirror 1 is set as R so that incident ray in annular sphere mirror 1 each time
The midpoint of reflected ray is substantially equal to the focus of annular sphere mirror 1.
In order to which incident ray incident each time can be gathered, prevent it in annular sphere mirror 1 after multiple reflections
Diverging, the front of the entrance aperture 11 are provided with for assembling incident ray and changing the focusing optics member of emergent ray angle
Part, incident ray inject corresponding annular sphere mirror 1 through the focusing optic from entrance aperture 11, and incident ray is in aforementioned ring
The midpoint of tangent line in shape spherical mirror 1 is the focus of the focusing optic.The focusing optic is condenser lens 31
Or focusing mirror 32, the optical axis of the condenser lens 31 are overlapped with incident ray.
The annular sphere mirror 1 has certain thickness, in order to ensure that incident ray smoothly injects annular from entrance aperture 11
The inside radius of spherical mirror 1, the annular sphere mirror 1 is R, and the outer radius of the annular sphere mirror 1 is R ', the light beam of incident ray
Radius is r, then diameter a ＞ 2r+ (R '-R) * sin θs of entrance aperture 11, according in the range of incidence angle and annular sphere mirror 1 half
The size of diameter and outer radius determines the aperture of entrance aperture 11 so that the incident ray in setting or theoretic ranges of incidence angles
It can inject in more light path chambers, ensure that the accuracy of test data.
Present invention also provides a kind of optical detection apparatus, as Figure 7-8, including more light path chambers, and with it is more
The driving device that light path chamber or optical distance measurement apparatus to be measured 2 are connected, the driving device drive more light path chambers or wait for photometry
Range unit 2 is rotated to change incidence angle, and the optical distance measurement apparatus 2 to be measured is using the incidence angle that each sets as test point
Position, corresponding each detection point record the measurement of incident ray that optical distance measurement apparatus 2 to be measured is sent out after excessive light path chamber
Distance is simultaneously compared with the actual distance of incident ray.
In order to ensure the stability of more light path chambers, prevent the slight error that driving device rotates from influencing the light of incident ray
Journey, the driving device are connected on the optical distance measurement apparatus to be measured 2, and the driving device is according to the detection point tune of setting
The numerical value of whole incidence angle θ is measured in each detection point by optical distance measurement apparatus 2 to be measured and exports each detection point
Measurement distance measures light intensity, and is compared with the actual distance corresponding to each detection point, waits for that photometry is surveyed to determine
Measurement precision away from device 2 simultaneously judges whether it is qualified.
In order to further simulate in actual measurement environment because of the light intensity attenuation of the incident ray caused by the factors such as weather, environment
Scene, the incident ray decayed in input path and receiving light path by attenuator 4.The attenuator 4 is arranged
Between optical distance measurement apparatus 2 to be measured and focusing optic.Preferably, the attenuation of the attenuator 4 is adjustable.
The optical distance measurement apparatus to be measured 2 includes transmitting light source 21 for emitting incident ray and for receiving from mostly light
The distance of the pick-up probe 22 of the emergent ray of journey chamber outgoing, the transmitting light source 21 and pick-up probe 22 is d, and described
Incident ray is vertical with transmitting light source 21 and the line of pick-up probe 22, when the focusing optic is condenser lens 31
When, as shown in fig. 7, the center of the condenser lens 31 is s at a distance from the transmitting light source 21 of optical distance measurement apparatus 2 to be measured1, institute
The center for stating condenser lens 31 is s at a distance from entrance aperture 112, the emergent ray injects to detector 22 from entrance aperture 11
Distance is s3, the focal length of the condenser lens 31 is f；The s2=f-Rcos θ, the s1=(Rcos θ cos (2 θ)+s2)*m/
(Rcos θ sin (2 θ)), s3=d/arctan (d/ (s1+s2)), the actual distance A=s of incident ray1+s2+s3+L1。
As shown in figure 8, when the focusing optic is focusing mirror 32, the optical distance measurement apparatus 2 to be measured
It is s at a distance from the pip of focusing mirror 32 to emit light source 211, pip and the entrance aperture 11 of the focusing mirror 32
Distance be s2, the distance that the emergent ray injects to detector 22 from entrance aperture 11 is s3, the coke of the focusing mirror 32
Away from for f；The s2=f-Rcos θ, the s1=(Rcos θ cos (2 θ)+s2) * d/ (Rcos θ sin (2 θ)), s3=d/arctan
(d/(s1+s2)), the actual distance A=s of incident ray1+s2+s3+L1。
Present invention also provides a kind of detection methods, and treating photometry range unit 2 using the detection device carries out
Detection, is as follows：
Step 1: the position of optical distance measurement apparatus 2 to be measured is adjusted by driving device, with the incidence of the different angle of setting
Angle is as detection point；
Step 2: optical distance measurement apparatus 2 to be measured sends out incident ray in each detection point set carries out ranging, and
It exports the measurement distance of each detection point or measures light intensity；
Step 3: the measurement distance and actual distance or measurement light intensity and actual distance to each detection point carry out
It compares, to judge whether optical distance measurement apparatus 2 to be measured is qualified.
Step 4: according to the measurement distance of each detection point and actual distance or measure light intensity and actual distance into
The result that row compares treats photometry range unit 2 and is modified and compensates.
Embodiment 2
As different from Example 1, as shown in figure 3, the annular microscope group includes being superimposed symmetrically arranged two rings up and down
Shape spherical mirror 1, the entrance aperture 11 are located therein on any one annular sphere mirror 1, incident ray from entrance aperture 11 injection after
It is the positive star-shaped light in the angles P that vertical view is reflected to form in two annular sphere mirrors 1 and between two annular sphere mirrors 1
The line of track, entrance aperture 11 and the centre of sphere 12 of annular sphere mirror 1 where it is incident radius R, then incident ray and incident half
The angle of diameter is incidence angle θ, optical length L of the incident ray in more light path intracavitary2=3* (4k+3) * 2Rcos θ.Wherein P=4k+
3, P by incident ray more light path intracavitary ray trajectories in vertical view be positive multi-corner star-shape number of edges, K be more than or equal to 1
Positive integer, θ=π/(8k+6).Relative to the structure of an annular sphere mirror 1 in embodiment 1, the structure of two annular sphere mirrors 1
Order of reflection of the incident ray between annular sphere mirror 1 further is increased, has significantly improved incident ray in more light paths
The light path of intracavitary.
With incident ray more light path intracavitary the be in vertical view of ray trajectory be positive 15 jiaos of star-shaped schematic diagrames, such as
Shown in Fig. 6, the reflection number in lower layer's annular sphere mirror 1 is An, the number of the pip in upper layer annular sphere mirror 1 is
Bn, by taking entrance aperture 11 is arranged in lower layer's annular sphere mirror 1 as an example, incident ray is from after 11 incidence of entrance aperture, in lower layer's annular ball
15 pips are shared on face mirror 1, are A respectively1-A15.In A145th secondary reflection occurs for point, in A2Point occurs the 17th time and the 32nd
Secondary reflection, in A3The 4th reflection occurs for point, in A421st time and the 36th secondary reflection occur for point, in A58th secondary reflection occurs for point,
A625th secondary reflection and the 40th secondary reflection occur for point, in A712nd secondary reflection occurs for point, in A8Point occurs the 29th time and the 44th time instead
It penetrates, in A91st secondary reflection and the 16th secondary reflection occur for point, in A1033rd secondary reflection occurs for point, in A11Point occur the 5th reflection and
20th secondary reflection, in A1237th secondary reflection occurs for point, in A139th secondary reflection and the 24th secondary reflection occur for point, in A14Point occurs the
41 secondary reflections, in A1513rd secondary reflection and the 28th secondary reflection occur for point.
Incident ray has 15 pips on the annular sphere mirror 1 on upper layer, is B respectively1-B15.In B1Point occurs the 15th
Secondary reflection and the 30th secondary reflection, in B22nd secondary reflection occurs for point, in B319th time and the 34th secondary reflection occur for point, in B4Point occurs
6th secondary reflection, in B523rd time and the 38th secondary reflection occur for point, in B610th secondary reflection occurs for point, in B7Point occur the 27th time and
42nd secondary reflection, in B814th secondary reflection occurs for point, in B931st secondary reflection occurs for point, in B10Point occurs the 3rd time and the 18th time
Reflection, in B1135th secondary reflection occurs for point, in B127th time and the 22nd secondary reflection occur for point, in B1339th secondary reflection occurs for point,
In B1411st time and the 26th secondary reflection occur for point, in B1543rd secondary reflection occurs for point.
In order to ensure that incident ray reflects between two annular sphere mirrors 1, the centre of sphere 12 of two annular sphere mirrors 1
Incident ray is symmetrically distributed between being formed by two flare layers in two annular sphere mirrors 1.
In order to ensure to be reflected again after the reflection of incident ray after injecting annular sphere mirror 1 each time all focuses again, protect
The light intensity for demonstrate,proving reflection light, when the structure of annular sphere mirror 1 meets above-mentioned requirements, the focal length F=R* of the annular sphere mirror 1
Cos θ, when just polygon star-shaped number of edges is more, then the angle of incidence angle θ is smaller, and R*cos θ more level off to R, then incident ray exists
Each secondary reflection in annular sphere mirror 1 is in that ensure that light in annular sphere mirror infinitely close to the centre of sphere 12 of annular sphere mirror 1
Cohesion in 1 so that incident ray reflects in annular sphere mirror 1 according to the optical path of setting, does not scatter and does not diffuse, reduces
The probability of the stray light noise occurred in test.
When it is implemented, can be according to the value model for determining incidence angle θ to the light path value range set by more light path chambers
It encloses, and takes intermediate value with numerical value that the focal length of the determination annular sphere mirror 1 is F=R*cos θ according to the value range of incidence angle θ；
Or also some or several most common numerical value or mean value can be specified to bring annular sphere into according in the value range of incidence angle θ
The focal length of mirror 1 is the calculation formula of F=R*cos θ, obtains the value of annular sphere mirror 1.
By taking the value range of incidence angle θ is less than or equal to π/14, is more than 0 as an example, the value range of cos θ, which is greater than, to be equal to
0.97437, it is less than 1；Namely as the angle of θ constantly becomes smaller, the value of cos θ is substantially equal to 1, that is, annular ball
The focal length of face mirror 1 is substantially equal to R, and in test, in order to obtain longer light path, the value of θ will value it is the smaller the better,
Therefore make when, the focal length of annular sphere mirror 1 is set as R so that incident ray in annular sphere mirror 1 each time
The midpoint of reflected ray is substantially equal to the focus of annular sphere mirror 1.
Preferably, as illustrated in figures 4-5, the height of the annular sphere mirror 1 is H, the annular sphere mirror 1 in lower layer is arranged
For, the height of the centre of sphere 12 of the annular sphere mirror 1 is H2, the H2It is located at annular equal to 3H/4, that is, the centre of sphere 12
At the H/4 of 1 height of spherical mirror, the distance c of the centre of sphere 12 of two annular sphere mirrors 1 is H/2.The height of entrance aperture 11 is
H1, the H1It is located at the 1/2 of annular sphere mirror 1 equal to H/2, that is, entrance aperture 11.It is high that the centre of sphere 12 is in annular sphere mirror 1
At the H/4 of degree, entrance aperture 11 is located at the H/2 of annular sphere mirror 1, and the difference in height between the centre of sphere 12 and entrance aperture 11 ensure that
Incident ray still can be close to the centre of sphere 12 between two annular sphere mirrors 1 in the value maximum at the angles θ according to setting path
Multiple reflections.
Incident ray is formed by two flare layers from after 11 incidence of entrance aperture in two annular sphere mirrors 1
Between spacing be c, theoretically, when c ＜ ＜ R, fully met the focus point of reflection of the incident ray in annular sphere mirror 1
It is approximately equal to the setting of the focus of annular sphere mirror 1.In specific test process, 0 c/R≤1/60 ＜, when c meets above-mentioned item
When part, the focus point of reflection of the incident ray in annular sphere mirror 1 is close to the focus of annular sphere mirror 1, ensure that incidence
Each secondary reflection of the light in annular sphere mirror 1 can be focused in close to the position of the centre of sphere 12.
In order to ensure the collimation of incident ray, and ensure that incident ray is assembled at entrance aperture 11, the entrance aperture 11
Front be provided with for assembling incident ray and changing the focusing optic of emergent ray angle, incident ray is through described poly-
Burnt optical element injects corresponding annular sphere mirror from entrance aperture 11, in tangent line of the incident ray in aforementioned toroidal spherical mirror
Point is the focus of the focusing optic.
Preferably, the focusing optic is condenser lens 31 or focusing mirror 32, the light of the condenser lens 31
Axis is overlapped with incident ray.
Because annular sphere mirror 1 has certain thickness, in order to ensure that incident ray smoothly injects annular from entrance aperture 11
The inside radius of spherical mirror 1, the annular sphere mirror 1 is R, and the outer radius of the annular sphere mirror 1 is R ', the light beam of incident ray
Radius is r, then diameter a ＞ 2r+ (R '-R) * sin θs of entrance aperture 11.
Present invention also provides a kind of optical detection apparatus, as shown in figs. 9-10, including more light path chambers, and with it is more
The driving device that light path chamber or optical distance measurement apparatus to be measured 2 are connected, the driving device drive more light path chambers or wait for photometry
Range unit 2 is rotated to change incidence angle, and the optical distance measurement apparatus 2 to be measured is using the incidence angle that each sets as test point
Position, corresponding each detection point record the measurement of incident ray that optical distance measurement apparatus 2 to be measured is sent out after excessive light path chamber
Distance is simultaneously compared with the actual distance of incident ray.
In order to ensure the stability of more light path chambers, prevent the slight error that driving device rotates from influencing the light of incident ray
Journey, the driving device are connected on the optical distance measurement apparatus to be measured 2, and the driving device is according to the detection point tune of setting
The numerical value of whole incidence angle θ is measured in each detection point by optical distance measurement apparatus 2 to be measured and exports each detection point
Measurement distance measures light intensity, and is compared with the actual distance corresponding to each detection point, waits for that photometry is surveyed to determine
Measurement precision away from device 2 simultaneously judges whether it is qualified.
In order to further simulate in actual measurement environment because of the light intensity attenuation of the incident ray caused by the factors such as weather, environment
Scene, the incident ray decayed in input path and receiving light path by attenuator 4.The attenuator 4 is arranged
Between optical distance measurement apparatus 2 to be measured and focusing optic.Preferably, the attenuation of the attenuator 4 is adjustable.
The optical distance measurement apparatus to be measured 2 includes transmitting light source 21 for emitting incident ray and for receiving from mostly light
The distance of the pick-up probe 22 of the emergent ray of journey chamber outgoing, the transmitting light source 21 and pick-up probe 22 is d, when described
When focusing optic is condenser lens 31, as shown in figure 9, the center of the condenser lens 31 and optical distance measurement apparatus 2 to be measured
Transmitting light source 21 distance be s1, the center of the condenser lens 31 is s at a distance from entrance aperture 112, the emergent ray from
The distance that entrance aperture 11 injects to detector 22 is s3, the focal length of the condenser lens 31 is f；The s2=f-Rcos θ, it is described
s1=(Rcos θ cos (2 θ)+s2) * m/ (Rcos θ sin (2 θ)), s3=d/arctan (d/ (s1+s2)), incident ray it is true away from
From A=s1+s2+s3+L2。
When the focusing optic is focusing mirror 32, as shown in Figure 10, the transmitting of the range unit to be measured
Light source 21 is s at a distance from the pip of focusing mirror 321, the pip of the focusing mirror 32 and entrance aperture 11 away from
From for s2, the distance that the emergent ray injects to detector 22 from entrance aperture 11 is s3, the focal length of the focusing mirror 32 is
f；The s2=f-Rcos θ, the s1=(Rcos θ cos (2 θ)+s2) * d/ (Rcos θ sin (2 θ)), s3=d/arctan (d/ (s1
+s2)), the actual distance A=s of incident ray1+s2+s3+L2。
Present invention also provides a kind of detection methods, and treating photometry range unit 2 using the detection device carries out
Detection, is as follows：
Step 1: the position of optical distance measurement apparatus 2 to be measured is adjusted by driving device, with the incidence of the different angle of setting
Angle is as detection point；
Step 2: optical distance measurement apparatus 2 to be measured sends out incident ray in each detection point set carries out ranging, and
It exports the measurement distance of each detection point or measures light intensity；
Step 3: the measurement distance and actual distance or measurement light intensity and actual distance to each detection point carry out
It compares, to judge whether optical distance measurement apparatus 2 to be measured is qualified.
Step 4: according to the measurement distance of each detection point and actual distance or measure light intensity and actual distance into
The result that row compares treats photometry range unit 2 and is modified and compensates.
Finally it should be noted that：Above example is only to illustrate the technical solution of the application rather than its limitations, to the greatest extent
Pipe is described in detail the application with reference to above-described embodiment, and those of ordinary skill in the art still can be to this Shen
Specific implementation mode please is modified or replaced equivalently, these without departing from the application spirit and scope any modification or
Equivalent replacement is being applied within pending claims hereof protection domain.
Claims (13)
1. a kind of more light path chambers, which is characterized in that including：The annular mirror that incident ray is projected after multiple reflections from entrance aperture
Group, the annular microscope group includes one or two annular sphere mirror, and the entrance aperture is opened in one of annular microscope group ring
On shape spherical mirror, the reflecting surface of the annular sphere mirror is on its inside wall.
2. more light path chambers according to claim 1, which is characterized in that more light path chambers include an annular sphere mirror,
The annular sphere mirror is symmetrical above and below along the horizontal plane where entrance aperture, the line of entrance aperture and the centre of sphere of annular sphere mirror be into
Radius R is penetrated, then the angle of incident ray and incident radius is incidence angle θ, and incident ray is in the ray trajectory of more light path intracavitary
The positive angles P star, incident ray more light path intracavitary optical length L1=（4k+3）* 2Rcos θ, wherein P=4k+3, P are incident ray
It is in the number of edges of positive multi-corner star-shape ray trajectory in more light path intracavitary, θ=π/(8k+6), wherein k are just whole more than or equal to 1
Number.
3. more light path chambers according to claim 1, which is characterized in that more light path chambers include that about two superpositions are symmetrical
The annular sphere mirror of setting, the entrance aperture are located therein on any one annular sphere mirror, and incident ray is injected from entrance aperture
It is the positive star-shaped light in the angles P to reflect to form vertical view in two annular sphere mirrors and between two annular sphere mirrors afterwards
Line tracking；
The line of entrance aperture and the centre of sphere of annular sphere mirror where it is incident radius, then the angle of incident ray and incident radius
For incidence angle θ, and θ=π/(8k+6), optical length L2=3* of the incident ray in more light path intracavitary（4k+3）* 2Rcos θ, P=4k+
3, wherein k are the positive integer more than or equal to 1.
4. more light path chambers according to claim 3, which is characterized in that the centre of sphere of two annular sphere mirrors is symmetrical
In incident ray between being formed by two flare layers in two annular sphere mirrors.
5. more light path chambers according to claim 4, which is characterized in that the height of the annular sphere mirror is H, the annular
Height H2=3H/4 of the centre of sphere of spherical mirror, height H1=H/2 of the entrance aperture, the centre of sphere of two annular sphere mirrors
Distance c=H/2.
6. according to the more light path chambers of claim 1-5 any one of them, which is characterized in that incident ray is injected from entrance aperture and corresponded to
Annular sphere mirror after, more light path intracavitary each reflected ray midpoint be the annular sphere mirror focus, the ring
The focal length of shape spherical mirror is F=R*cos θ.
7. according to the more light path chambers of claim 3-5 any one of them, which is characterized in that incident ray from after entrance aperture incidence
The spacing being formed by two annular sphere mirrors between two flare layers is c, 0 c/R≤1/60 ＜.
8. according to the more light path chambers of claim 1-5 any one of them, which is characterized in that the front setting of the entrance aperture is useful
In the focusing optic for assembling incident ray, incident ray injects corresponding annular through the focusing optic from entrance aperture
Spherical mirror, the midpoint of tangent line of the incident ray in aforementioned toroidal spherical mirror are the focus of the focusing optic.
9. more light path chambers according to claim 8, which is characterized in that the focusing optic is condenser lens or focusing
The optical axis of speculum, the condenser lens is overlapped with incident ray.
10. according to the more light path chambers of claim 1-5 any one of them, which is characterized in that the inside radius of the annular sphere mirror
Outer radius for R, the annular sphere mirror is R ', and the beam radius of incident ray is r, then the diameter a ＞ 2r+ of entrance aperture（R’-
R）*sinθ.
11. a kind of optical detection apparatus, which is characterized in that including the more light path chambers of such as claim 1-10 any one of them, with
And the driving device being connected with more light path chambers or optical distance measurement apparatus to be measured, the driving device drive more light path chambers or to be measured
Optical distance measurement apparatus is rotated to change the incidence angle of incident ray, the incidence that the optical distance measurement apparatus to be measured is set with each
As detection point, corresponding each detection point records incident ray that optical distance measurement apparatus to be measured is sent out through excessive light path at angle
Measurement distance after chamber is simultaneously compared with the actual distance of incident ray.
12. optical detection apparatus according to claim 11, which is characterized in that the incidence of the optical distance measurement apparatus to be measured
Attenuator is provided in light path and/or on receiving light path.
13. optical detection apparatus according to claim 11 or 12, which is characterized in that the optical distance measurement apparatus packet to be measured
Include the transmitting light source for emitting incident ray and the pick-up probe for receiving the emergent ray being emitted from more light path chambers, institute
State incident ray with transmitting light source and the line of pick-up probe it is vertical, it is described transmitting light source and pick-up probe distance be d,
The condenser lens or focusing mirror for assembling incident ray are provided in front of the entrance aperture of more light path chambers, it is described poly-
The focal length of focus lens or focusing mirror is f, the center of the condenser lens or the pip of focusing mirror and ranging to be measured
The distance of the transmitting light source of device is s1, and the center of the condenser lens or the pip of focusing mirror are at a distance from entrance aperture
For s2, distance that the emergent ray injects to detector from entrance aperture is s3, s2=f-Rcos θ, the s1=（Rcosθ
cos（2θ）+s2）*d/（Rcosθsin（2θ））, s3=d/arctan (d/ (s1+s2))；
When more light path chambers include an annular sphere mirror, then actual distance A=s1+s2+s3+ L1 of incident ray；Work as light path
When chamber includes two annular sphere mirrors, actual distance A=s1+s2+s3+L2 of incident ray.
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| CN201721070708.XU CN207636764U (en) | 2017-08-25 | 2017-08-25 | A kind of more light path chambers and detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688172A (en) * | 2017-08-25 | 2018-02-13 | 北醒（北京）光子科技有限公司 | A kind of more light path chamber, detection means and detection methods |
| CN109407310A (en) * | 2018-12-09 | 2019-03-01 | 山西大学 | A kind of design method in multi-pass pond |
| CN112540360A (en) * | 2019-09-23 | 2021-03-23 | 北醒（北京）光子科技有限公司 | Radar and angle adjusting device |
-
2017
- 2017-08-25 CN CN201721070708.XU patent/CN207636764U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688172A (en) * | 2017-08-25 | 2018-02-13 | 北醒（北京）光子科技有限公司 | A kind of more light path chamber, detection means and detection methods |
| CN107688172B (en) * | 2017-08-25 | 2023-12-29 | 北醒（北京）光子科技有限公司 | Multi-optical path cavity, detection device and detection method |
| CN109407310A (en) * | 2018-12-09 | 2019-03-01 | 山西大学 | A kind of design method in multi-pass pond |
| CN109407310B (en) * | 2018-12-09 | 2020-07-10 | 山西大学 | Design method of multi-pass tank |
| CN112540360A (en) * | 2019-09-23 | 2021-03-23 | 北醒（北京）光子科技有限公司 | Radar and angle adjusting device |
| CN112540360B (en) * | 2019-09-23 | 2023-10-13 | 北醒（北京）光子科技有限公司 | Radar and angle adjusting device |
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