CN209085560U - A kind of confocal three-dimensional appearance optical measurement mechanism of colour - Google Patents
A kind of confocal three-dimensional appearance optical measurement mechanism of colour Download PDFInfo
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- CN209085560U CN209085560U CN201821595191.0U CN201821595191U CN209085560U CN 209085560 U CN209085560 U CN 209085560U CN 201821595191 U CN201821595191 U CN 201821595191U CN 209085560 U CN209085560 U CN 209085560U
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Abstract
The utility model relates to a kind of confocal three-dimensional appearance optical measurement mechanisms of colour to obtain the relationship of wavelength color and displacement by axial dispersion using secondary color light source, can improve measuring speed to avoid axial scan bring time-consuming problem；The spurious signal of non-focal plane is filtered out by aperture, obtains the sharp signal for being located at focal plane, and there is very high axial resolution.The elevation information on the monochromatic light reflection measured object surface of different wave length is realized in the implementation of the utility model.
Description
Technical field
The utility model relates to field of optical measurements, survey more specifically to a kind of confocal three-dimensional appearance optics of colour
Measuring mechanism.
Background technique
With science and technology and the rapid development for manufacturing industry, the delicate metering represented is measured as with three-dimensional surface shape
Concern of the technology by more and more scholars, more and more fields generate very big demand to object three-dimensional profile measuring, all
Such as mechanical automobile manufacturing industry, medical imaging measurement, space remote sensing etc..In medical domain, the department of stomatology uses three-dimensional measurement instrument
Tooth is measured, shaping and beauty section carries out conceptual design using the three-dimensional imaging to human skin appearance and operation is implemented,
Heart dynamic is observed using detection monitoring apparatus in real time by department of cardiac surgery；In field of industrial manufacturing, surface is carried out to the product of generation
Roughness measurement improves product quality, carries out reverse-engineering directly from check analysis by three-dimensional imaging, derives setting for product
Principle is counted, is carried out using quality of the measuring three-dimensional morphology to printed circuit board.Therefore, the three-dimensional appearance information of object how is obtained
To be increasingly taken seriously for every field service.
With image-forming technology, the fast development of shadow casting technique, computer technology, measuring three-dimensional morphology technology, tradition
Contacting three coordinates measurement machine cannot meet the reconstructions of all object dimensional patterns again.Therefore researcher investment
A large amount of time and efforts research and develop various optical 3-dimensional topographies, with meet actual commercial measurement and
Detection etc. requires.
Digital stripe shadow casting technique projects the technology of grating fringe using digital projector, be common optics three
Tie up one of topography measurement method.When carrying out measuring three-dimensional morphology, computer controls projector and generates bar graph and project to tested
Body surface is modulated by testee apparent height, and striped is deformed, and colorful CCD camera acquires deforming stripe figure.By right
Bar graph is parsed, and the three-dimensional information of body surface is obtained.
The advantages of fringe projection method, is the phase finding process not influence by background light intensity to measured object every bit,
It is different so as to avoid body surface reflectivity, illumination intensity is uneven etc., and factors bring measurement error into.
But it is also the same obvious that it is insufficient: the acquisition of three-dimensional appearance data is limited to the performance of system hardware, especially existing
The projection speed of digital projection system can not quickly measure the three-dimensional appearance of object Shape '.
Chinese invention patent 200910133998.1 discloses a kind of synchronous form and aspect shift conversion method and its three-dimensional shaped
Looks measuring system obtains the colour play image about object, then by the color of the color fringe image using color structured light
Form and aspect (hue) information about the color fringe image is obtained in phase saturation intensity (HSI) model, finally again by the form and aspect information
It is converted into form and aspect phase change information.Form and aspect Phase Build Out object dimensional pattern is penetrated using the form and aspect phase change information.
In foregoing invention, color structured light is by a plurality of coloured light institutes with space (spatial domain) phase difference
It is formed, therefore individual colored capture includes the dephased phase packaging information of multistep and i.e. executable phase shift and Phase Build Out,
Conventional phase encapsulation and the outstanding process for drawing conversion are omitted, improves object surface appearance and rebuilds (surface reconstruction)
And the efficiency of system measurements.
However, the deficiency of foregoing invention is: needing the fringe projection of at least two outs of phase to tested object plane, ability
Carry out subsequent image procossing.
At will technology development, colour copolymerization coke is also widely used in object surface three-dimensional morphology detection.2012 Nian Chenliang
Good " the Full-field chromatic confocal surfaceprofilometry employing delivered
Digitalmicromirror devicecorrespondence forminimizing lateral cross talks " one
It proposes to utilize colored focusing technology detection object three-dimensional surface shape altogether in text.Use color camera as reflection light-receiving in text
End, demarcates axial height by rgb value.Paper proposes dispersion range being divided into different sections, only with two in each section
Reference colours calibration, such as RG, RB, GB, can find the parameter with axial height linear correlation in any section after conversion.
But method described in the paper not can guarantee its linearity with axial height relationship because directly demarcating rgb value.
In the prior art, the appearance of colour imaging and optical projection system provides for parallel more Color Channel 3-D imaging systems
New research direction." measuring three-dimensional morphology based on color fringe projection art " delivered at 2017 " Chinese journal of scientific instrument "
In one text, Zhang Zonghua et al. proposes the 3 D measuring method based on color fringe projection art, dry by grating, laser first
Interferometer or computer generate stripe pattern, project color fringe to testee surface using projection device；Stripe pattern due to
Modulation by testee surface shape is deformed, the bar graph that color-image forming apparatus is deformed from another angle acquisition；
It resolves to obtain expansion phase by phase；Calibration system obtains corresponding relationship between phase diagram and three-dimensional data, finally obtains object
Three-dimensional appearance data.Color fringe projection art due to using multiple Color Channels simultaneously there is single acquisition to contain much information, survey
Measure the advantages that speed is fast.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of confocal three-dimensional appearance optics survey of colour
Measuring mechanism realizes the elevation information on the monochromatic light reflection measured object surface of different wave length.
The technical solution of the utility model is as follows:
A kind of confocal three-dimensional appearance optical measurement mechanism of colour, including the secondary color light source, light source pin hole, collimation being arranged successively
Lens, dispersion Guan Jing, spectroscope, object lens, objective table, the light that secondary color light source issues is through light source pin hole, collimation lens, dispersion pipe
Mirror, spectroscope, object lens reach measured object surface, and the light that measured object surface reflection is returned is by object lens to spectroscope.
Preferably, further including plus lens, detecting pinhole, output optical fibre, output optical fibre is used to connect with color camera,
The monochromatic light of reflection successively concentrated lens, detecting pinhole, output optical fibre, are transmitted to color camera.
Preferably, objective table is two dimensional motion objective table, measured object is driven to carry out two dimensional motion.
Preferably, further including inductance amesdial, for monitoring the axial position of objective table.
The beneficial effects of the utility model are as follows:
The confocal three-dimensional appearance optical measurement mechanism of colour described in the utility model passes through axis using secondary color light source
Crossed disperstion obtains the relationship of wavelength color and displacement, can improve measurement speed to avoid axial scan bring time-consuming problem
Degree；The spurious signal of non-focal plane is filtered out by aperture, obtains the sharp signal for being located at focal plane, and there is very high axial resolution
Rate.
The elevation information on the monochromatic light reflection measured object surface of different wave length is realized in the implementation of the utility model.
Detailed description of the invention
Fig. 1 is the structural block diagram of colored confocal three dimensional shape measurement system；
In figure: 10 be composite light source, and 11 be light source pin hole, and 12 be collimation lens, and 13 be dispersion Guan Jing, and 14 be spectroscope,
15 be object lens, and 16 be objective table, and 17 be plus lens, and 18 be detecting pinhole, and 19 be output optical fibre, and 20 be color camera, and 30 are
Measured object, 40 be inductance amesdial.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
The confocal three-dimensional appearance optical measurement mechanism of a kind of colour described in the utility model, as shown in Figure 1, including successively arranging
Secondary color light source, light source pin hole 11, collimation lens 12, dispersion pipe mirror 13, spectroscope 14, the object lens 15, objective table 16 of column；Optics is surveyed
Measuring mechanism is used to generate the monochromatic light of different wave length, and focuses on 30 body surface face of measured object.
Optical measurement mechanism further includes plus lens 17, detecting pinhole 18, output optical fibre 19, and output optical fibre 19 is used for and coloured silk
Form and aspect machine 20 connects, and the monochromatic light of reflection successively concentrated lens 17, detecting pinhole 18, output optical fibre 19 are transmitted to colored phase
Machine 20.
In the utility model, the light that secondary color light source issues is through light source pin hole 11, collimation lens 12, dispersion pipe mirror 13, light splitting
Mirror 14 and object lens 15 reach 30 surface of measured object, and the light that 30 surface reflection of measured object is returned passes through object lens 15, spectroscope 14, convergence
Lens 17, detecting pinhole 18 and output optical fibre 19 reach color camera 20, data acquisition.
In order to facilitate all standing for moving and meeting 30 surface of measured object, objective table 16 is two dimensional motion objective table 16, band
Dynamic measured object 30 carries out two dimensional motion.The utility model further includes inductance amesdial 40, for monitoring the axial position of objective table 16
It sets, the axial position of objective table 16, according to the monitoring of inductance amesdial 40, the every shifting of objective table 16 is monitored by inductance amesdial 40
After moving preset step pitch (in the present embodiment, every mobile 5um saves a color image), current displacement data and current coloured silk are recorded
Chromatic graph picture.
Above-described embodiment is intended merely to illustrate the utility model, and is not used as the restriction to the utility model.As long as
According to the technical essence of the utility model, above-described embodiment is changed, modification etc. will all fall in the right of the utility model
In the range of it is required that.
Claims (2)
1. a kind of confocal three-dimensional appearance optical measurement mechanism of colour, which is characterized in that including secondary color light source, the light source being arranged successively
Pin hole, collimation lens, dispersion Guan Jing, spectroscope, object lens, objective table, the light that secondary color light source issues are saturating through light source pin hole, collimation
Mirror, dispersion Guan Jing, spectroscope, object lens reach measured object surface, and the light that measured object surface reflection is returned is by object lens to spectroscope；
Objective table is two dimensional motion objective table, and measured object is driven to carry out two dimensional motion；It further include inductance amesdial, for monitoring objective table
Axial position.
2. the confocal three-dimensional appearance optical measurement mechanism of colour according to claim 1, which is characterized in that further include that convergence is saturating
Mirror, detecting pinhole, output optical fibre, output optical fibre with color camera for connecting, and the monochromatic light of reflection is successively through plus lens, spy
Stylus hole, output optical fibre, are transmitted to color camera.
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| CN201821595191.0U CN209085560U (en) | 2018-09-28 | 2018-09-28 | A kind of confocal three-dimensional appearance optical measurement mechanism of colour |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474807A (en) * | 2020-05-07 | 2020-07-31 | 华侨大学 | Fixing device for external lens of mobile phone and external lens |
| CN111982027A (en) * | 2020-09-01 | 2020-11-24 | 中国科学院长春光学精密机械与物理研究所 | Free-form surface non-contact type measuring system based on dispersion confocal |
| CN113959363A (en) * | 2021-09-24 | 2022-01-21 | 江苏锐精光电研究院有限公司 | Line scanning type spectrum confocal device based on high-dispersion cylindrical lens and cylindrical concave grating |
-
2018
- 2018-09-28 CN CN201821595191.0U patent/CN209085560U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474807A (en) * | 2020-05-07 | 2020-07-31 | 华侨大学 | Fixing device for external lens of mobile phone and external lens |
| CN111982027A (en) * | 2020-09-01 | 2020-11-24 | 中国科学院长春光学精密机械与物理研究所 | Free-form surface non-contact type measuring system based on dispersion confocal |
| CN113959363A (en) * | 2021-09-24 | 2022-01-21 | 江苏锐精光电研究院有限公司 | Line scanning type spectrum confocal device based on high-dispersion cylindrical lens and cylindrical concave grating |
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