CN107817049A - A kind of static Fourier spectrum device - Google Patents
A kind of static Fourier spectrum device Download PDFInfo
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- CN107817049A CN107817049A CN201710888594.8A CN201710888594A CN107817049A CN 107817049 A CN107817049 A CN 107817049A CN 201710888594 A CN201710888594 A CN 201710888594A CN 107817049 A CN107817049 A CN 107817049A
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- fourier spectrum
- spectrum device
- static fourier
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- 238000001228 spectrum Methods 0.000 title claims abstract description 48
- 230000003068 static effect Effects 0.000 title claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
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- 230000003595 spectral effect Effects 0.000 abstract description 6
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- 102100027339 Slit homolog 3 protein Human genes 0.000 description 9
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- 238000004458 analytical method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/26—Generating the spectrum; Monochromators using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/021—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using plane or convex mirrors, parallel phase plates, or particular reflectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/04—Slit arrangements slit adjustment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J2003/1208—Prism and grating
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The embodiment of the present invention discloses a kind of static Fourier spectrum device, including preposition optical texture, and the preposition optical texture includes planar delta mirror, the first spherical mirror and slit above the planar delta mirror；Double right angle beam splitters, double right angle beam splitters include the first Dove prism and the second Dove prism, and the bottom surface of first Dove prism and the bottom surface of the second Dove prism preset distance that staggers are bonding and form beam-splitting surface；Rearmounted optical texture, the rearmounted optical texture include the second spherical mirror and cylindrical mirror.The embodiment of the present invention is based on double right angles beam splitter, except beam splitter is all using reflective structure, light path is effectively folded, so as to reduce the volume of whole system, effectively widen spectral region.
Description
Technical field
The present invention relates to spectrum measurement instruments technical field, more particularly to a kind of static Fourier spectrum device, is particularly
Reflective static Fourier spectrum device based on double right angle beam splitters.
Background technology
Spectral instrument is the strong instrument for analyzing material constituent and structure, environmental monitoring, chemical analysis,
The scientific research field such as biomedical, national defence and optoelectronic functional materials and industrial circle suffer from extensive use, and these fields and production
The on-line real time monitoring of industry and the requirement such as portable have promoted the development that spectral instrument is miniaturized, and before having wide application
Scape.
Traditional Fourier spectrum device is due to the more element of usage quantity, so as to be difficult to compact structure.Pass
Moving parts in the Fourier spectrum device of system limits the mechanical stability of device, and has sternly to using and placing environment
Lattice requirement, therefore, traditional Fourier spectrum device are difficult to meet the needs of open air such as field detection, environmental monitoring uses.Pass
The optical texture of the Fourier spectrometer of system is provided with drive device, unfavorable so as to cause mechanical wear, reduce the spectrometer life-span
Produced in miniaturization.
In recent years, traditional Fourier spectrum device is substituted using the static Fourier spectrum device of two-beam interference, obtained
To developing rapidly.Static Fourier spectrum device generally comprises preposition optical system, beam splitter and rearmounted optical system.It is rearmounted
Optical system includes fourier lense and cylindrical lens structure, and using the transmission-type structure along optical axis.But in the prior art
Fourier spectrum device has that system complex, volume be larger, high cost.
Therefore, it is necessary to which one kind is compact-sized to realize volume reduction, the simply static Fourier spectrum device of system architecture.
The content of the invention
For the problems of existing static Fourier spectrum device, the present invention proposes a kind of the quiet of double right angle beam splitters
State Fourier spectrum device.The static Fourier spectrum device is based on double right angles beam splitter, except beam splitter is all using reflective
Structure, light path is effectively folded, so as to reduce the volume of whole system, effectively widen spectral region.
The scheme of the static Fourier spectrum device is as follows：A kind of static Fourier spectrum device, including preposition optics knot
Structure, the preposition optical texture include planar delta mirror, the first spherical mirror above the planar delta mirror, and narrow
Seam；Double right angle beam splitters, double right angle beam splitters include the first Dove prism and the second Dove prism, the first trapezoidal rib
The bottom surface of the bottom surface of mirror and the second Dove prism preset distance that staggers is bonding and form beam-splitting surface；Rearmounted optical texture,
The rearmounted optical texture includes the second spherical mirror and cylindrical mirror.
Preferably, the slit is located at the front focal plane of second spherical mirror, and the focus of the cylindrical mirror is located at institute
At the back focal plane for stating the second spherical mirror.
Preferably, the planar delta mirror is by the first mirror tilt first angle and the second mirror tilt second angle
Fixation forms.
Preferably, first level crossing is identical with the second level crossing size, and the first angle is positive 40 degree, institute
Second angle is stated as minus 40 degree.
Preferably, the preset distance of double right angle beam splitters is 0.707 millimeter.
Preferably, the angle of inclination of second spherical mirror is equal to the angle of inclination of the cylindrical mirror.
Preferably, the angle of inclination is 6 degree.
Preferably, the specular material of the planar delta mirror, the first spherical mirror, the second spherical mirror or cylindrical mirror is selected
K9 glass.
Preferably, the minute surface of the planar delta mirror, the first spherical mirror, the second spherical mirror or cylindrical mirror is aluminized reflection
Film.
Preferably, double right angle beam splitters use K9 glass materials, and the beam-splitting surface plates semi-transparent semi-reflecting film.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
The embodiment of the present invention is based on double right angles beam splitter and designs reflective static Fourier spectrum device, except beam splitter
Outside, whole Optical devices use reflective structure, are effectively folded light path, so as to reduce the volume of whole system；Due to using
Reflective structure will not cause aberration, so as to which spectral device can widen the effective range of spectrum.The embodiment of the present invention is provided
Static Fourier spectrum device there is many advantages, such as small volume, light weight, high stability, to miniaturization, Portable Static
The research of Fourier spectrum instrument is significant.
Brief description of the drawings
Fig. 1 is to provide a kind of reflective static Fourier spectrum device based on double right angle beam splitters in the embodiment of the present invention
The top view of light path；
Fig. 2 is the reflective static Fourier spectrum device light path based on double right angle beam splitters in embodiment illustrated in fig. 1
Side view；
Fig. 3 be in embodiment illustrated in fig. 1 in the reflective static Fourier spectrum device based on double right angle beam splitters before
Put optical texture；
Fig. 4 be in embodiment illustrated in fig. 1 in the reflective static Fourier spectrum device based on double right angle beam splitters after
Put optical texture.
Drawing reference numeral explanation：
1st, planar delta mirror 2, the first spherical mirror 3, slit
4th, right angle beam splitter 41, the first trapezoidal corner angle 42, the second trapezoidal corner angle
5th, the second spherical mirror 6, cylindrical mirror 7, planar array detector
8th, the front focal plane 9 of the second spherical mirror, the back focal plane of the second spherical mirror
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
The (if present)s such as four " are for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution so uses can exchange in the appropriate case, so that the embodiments described herein can be with except illustrating herein
Or the order beyond the content of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment need not limit
In those steps or unit for clearly listing, but may include not list clearly or for these processes, method, production
The intrinsic other steps of product or equipment or unit.
As depicted in figs. 1 and 2, a kind of reflective static state based on double right angle beam splitters respectively in the embodiment of the present invention
The top view and side view of Fourier spectrum device light path.In this embodiment, the reflective static state based on double right angle beam splitters
Fourier spectrum device includes preposition light channel structure, double right angle beam splitters and rearmounted light channel structure successively.It is preposition light channel structure, double
The specific component parts and mutual cooperation mode of right angle beam splitter and rearmounted light channel structure are described in detail below in conjunction with accompanying drawing.
With reference to shown in Fig. 3, preposition light channel structure includes planar delta mirror 1, the first spherical mirror 2 and slit 3.In an embodiment
In, planar delta mirror 1 can be fixed by the first mirror tilt first angle and the second mirror tilt second angle and formed, described
The material of first level crossing and the second level crossing can with it is identical, profile size dimension is also identical.Preferably, first angle α 1 is
Positive 40 degree, second angle α 2 be minus 40 degree, and the first level crossing and the second level crossing are equal in magnitude.
At the pre-determined distance for the top that first spherical mirror 2 is arranged at planar delta mirror 1, it is preferred that the first spherical mirror 2 is located at
At the surface 28.5mm of planar delta mirror 1.Certainly according to miscellaneous part spacing in spectral device and of different sizes, spherical mirror 2
Also adjusted with the relative position of planar delta mirror 1 adaptability, only need spherical mirror 2 to realize convergence planar delta mirror 1
Reflection light.In other embodiments, spherical mirror 2 can tilt certain angle with respect to planar delta mirror 1 or be fitted at a distance of length
Answering property changes.When the illumination that directional light is sent is mapped to the one side of triangle speculum 1, the first spherical mirror through reflected illumination to top
2 convergences, and reflected by the another side of planar delta mirror 1 and form a hot spot in slit 3.
In this embodiment, the size radius of curvature of the first spherical mirror 2 elects 93.8mm, center thickness 5mm as.Slit 3 away from
It is 23mm from the centre distance of planar delta speculum 1.
Double right angle beam splitters 4 include the first Dove prism 41 and the second Dove prism 42.Wherein, first Dove prism 41
The bottom surface of bottom surface and the second Dove prism 42 predetermined distance d that staggers is bonding and form beam-splitting surface.Projected from slit 3
Converged light is entered in double right angles beam splitter 4, and light beam enters from the one side of prism, and two beams are divided at beam-splitting surface.Light beam
Transmitted light beam all the way and all the way the reflected beams are divided into by the beam-splitting surface of double right angle beam splitters 4.In preposition optical texture from above-mentioned
Parameter and apart from when setting, the bottom surface of the bottom surface of the first Dove prism 41 and the second Dove prism 42 stagger predetermined distance d
For 0.707mm, 2mm maximum optical path difference be present so as to the two-beam of outgoing.Maximum optical path difference can according to application demand or
Injection optical wavelength is different and the adjustment of adaptability, specific scope can be 0.5mm between 10mm.Such as those skilled in the art institute
Know, when planar delta mirror 1, the size of spherical mirror 2 and slit 3 and the relative position in preposition optical texture change, the
Bottom surface between one Dove prism 41 and the second Dove prism 42 pre-determined distance d that staggers also carries out the adjustment of adaptability, to meet
Maximum optical path difference between the two-beam of outgoing.
With reference to shown in Fig. 4, rearmounted optical texture includes the second spherical mirror 5 and cylindrical mirror 6, and the second spherical mirror 5 plays Fu
In leaf transformation act on.Slit 3 is arranged at the opening position that the front focal plane 8 of the second spherical mirror 5 intersects with optical axis, cylindrical mirror 6
Focus be located at the back focal plane 9 of the second spherical mirror 5.To make rearmounted optical texture more compact, the second spherical mirror 5 and cylinder are anti-
Penetrate mirror 6 and be respectively equipped with an angle of inclination, and the angle of inclination of the second spherical mirror 5 is equal to the angle of inclination of cylindrical mirror 6.Should
Angle of inclination makes eyeglass not shut out the light just, greatly reduces its longitudinal size size.In preposition optical texture as described above and
In the case of the part and parameter values of double right angle beam splitters 4, the angle of inclination can select in the range of 5 degree to 10 degree, and such as 5.36
Spend, 6 degree, 8 degree, 10 degree etc..Preferably, in order that the size of Optical devices is as far as possible small, 6 degree are preferably set to.Certainly, above-mentioned
In the case that the part and parameter values of preposition optical texture and double right angles beam splitter 4 change, the angle of inclination it is preferred
Scope also can adaptively be changed.The angle of inclination carries out angle of inclination on the basis of the horizontal plane of Fourier spectrum device
Calculate.After light enters spherical mirror, emergent light is directional light, enters planar array detector 7, light through the reflected beams of cylindrical mirror 6
Beam obtains interference data at planar array detector 7.
In the case where the parameter of the above-mentioned reflective static Fourier spectrum device embodiment based on double right angle beam splitters determines, the
Two spherical mirrors 5 are preferably set to 76.5mm apart from the centre distance of double right angle beam splitters 4.The size radius of second spherical mirror 5 is elected as
24mm*16mm, radius of curvature 260.42mm, center thickness 5mm.Cylindrical mirror 6 is located at the front of the second spherical mirror of distance 5
60mm at, radius of curvature 147mm, center thickness 5mm, cylindrical mirror size elect 24mm*14mm as.
The parameter for the detector that part dimension size in device described above mainly selects as needed sets to derive
Meter.Part dimension size can select different sizes according to the conversion of detector.Each portion in device described above
Relative position between part is determined by the focal length of optical element.The focal length of optical element typically first assumes a preset value,
Then re-optimization selects a suitable combination.The selection and design of distance between part and part, it is based primarily upon the overall instrument of reduction
Size, increase beam utilization and the purpose for improving signal to noise ratio of device.
In other embodiments, the part in the reflective static Fourier spectrum device based on double right angle beam splitters and portion
Part spacing can also select other sizes and distance.For example, slit 3 is arranged to the focal plane of the first spherical mirror 2, or will be narrow
Seam 3 is arranged at the focal plane of the second spherical mirror 5, or cylindrical mirror 6 is located at the focal plane of the second spherical mirror 5.Second ball
Face mirror 5 apart from double right angle beam splitters 4 centre distance it is optional be set to 38.25mm, the size radius of the second spherical mirror 5 is chosen as
24mm*16mm, the radius of curvature of the second spherical mirror 5 is 60.1mm, center thickness 5mm.Cylindrical mirror 6 can be located at distance the
At the front 30mm of two spherical mirror 5, the radius of curvature of cylindrical mirror 6 is 73.5mm, center thickness 5mm, the chi of cylindrical mirror 6
Very little size elects 24mm*14mm as.
Planar delta speculum 1, the first spherical mirror 2, the second spherical mirror 5 and cylindrical mirror 6 all employ K9 glass work
For Mirror blank materials, the glass of other materials can also be used, and aluminium mirror coating is plated on each face, so that light wave is a length of
1000-1800nm reflectivity is more than 90%, simultaneously effective reduces cost.The material of double right angle beam splitters also uses K9 glass
Glass, and semi-transparent semi-reflecting film is plated on beam-splitting surface, make its meet at wavelength 1000-1600nm reflectivity it is identical with transmitance and
Reflectivity and transmissivity is both greater than 45%.Reflectivity and transmissivity is identical, can effectively improve intetference-fit strengthening, so as to
Improve capacity usage ratio.
Referring again to Fig. 1 and Fig. 2, light beam is in the reflective static Fourier spectrum device based on double right angle beam splitters
Light path it is as follows.Light source sends the one side that a branch of directional light is incident to planar delta mirror 1, the first ball through reflected illumination to top
Face mirror 2 converges, and is reflected by the another side of planar delta mirror 1 and form a converged light in slit 3.Converged light is penetrated from slit 3
Go out and enter in double right angles beam splitter 4, the one side of the Shu Guangcong prisms enters, by the beam-splitting surface of double right angle beam splitters 4 point
Into transmitted light beam all the way and all the way the reflected beams, have certain optical path difference between transmitted light and reflected light, to form interference.
Transmitted light and reflected light reflex to the second spherical mirror 5 by corresponding trapezoidal corner angle again.After light enters the second spherical mirror 5, go out
Penetrate light turns into directional light again, enters planar array detector 7 through the reflected beams of cylindrical mirror 6, light beam obtains at planar array detector 7
To interference data.
The reflective static Fourier spectrum device based on double right angle beam splitters that the embodiment is provided, except right angle beam splitting
All using reflective structure outside device 4, light path is effectively folded.Under the conditions of same aplanatism, the static Fourier spectrum device
Volume be less than existing transmission-type structural volume 1/2.The static Fourier spectrum device using reflective structure not only not
Aberration can be caused, additionally it is possible to widen the effective range of spectrum.The embodiment provided based on the reflective of double right angle beam splitters
Static Fourier spectrum device has many advantages, such as small volume, light weight, high stability, is effectively facilitated miniaturization, portable
The development and application of formula static fourier spectrometer device.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
- A kind of 1. static Fourier spectrum device, it is characterised in that including：Preposition optical texture, the preposition optical texture include planar delta mirror, first above the planar delta mirror Spherical mirror, and slit；Double right angle beam splitters, double right angle beam splitters include the first Dove prism and the second Dove prism, and described first is trapezoidal The bottom surface of the bottom surface of prism and the second Dove prism preset distance that staggers is bonding and form beam-splitting surface；Rearmounted optical texture, the rearmounted optical texture include the second spherical mirror and cylindrical mirror.
- 2. a kind of static Fourier spectrum device according to claim 1, it is characterised in that the slit is positioned at described the The front focal plane of two spherical mirrors, the focus of the cylindrical mirror are located at the back focal plane of second spherical mirror.
- 3. a kind of static Fourier spectrum device according to claim 1, it is characterised in that the planar delta mirror is by One mirror tilt first angle and the second mirror tilt second angle, which are fixed, to be formed.
- 4. a kind of static Fourier spectrum device according to claim 3, it is characterised in that first level crossing and institute It is identical to state the second level crossing size, the first angle is positive 40 degree, and the second angle is minus 40 degree.
- 5. a kind of static Fourier spectrum device according to claim 1, it is characterised in that double right angle beam splitters Preset distance is 0.707 millimeter.
- 6. a kind of static Fourier spectrum device according to claim 1, it is characterised in that second spherical mirror inclines Rake angle is equal to the angle of inclination of the cylindrical mirror.
- 7. a kind of static Fourier spectrum device according to claim 6, it is characterised in that the angle of inclination is 6 degree.
- 8. a kind of static Fourier spectrum device according to claim 1, it is characterised in that the planar delta mirror, The specular material of one spherical mirror, the second spherical mirror or cylindrical mirror selects K9 glass.
- 9. a kind of static Fourier spectrum device according to claim 8, it is characterised in that the planar delta mirror, The minute surface plating aluminium mirror coating of one spherical mirror, the second spherical mirror or cylindrical mirror.
- A kind of 10. static Fourier spectrum device according to claim 1, it is characterised in that double right angle beam splitters Using K9 glass materials, the beam-splitting surface plates semi-transparent semi-reflecting film.
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| CN201710888594.8A CN107817049A (en) | 2017-09-27 | 2017-09-27 | A kind of static Fourier spectrum device |
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| CN201710888594.8A CN107817049A (en) | 2017-09-27 | 2017-09-27 | A kind of static Fourier spectrum device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931298A (en) * | 2018-08-31 | 2018-12-04 | 中国科学院光电研究院 | A kind of compact high throughput high stability inteference imaging spectrometer |
| CN110989142A (en) * | 2019-12-30 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
-
2017
- 2017-09-27 CN CN201710888594.8A patent/CN107817049A/en active Pending
Non-Patent Citations (1)
| Title |
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| 李晚侠等: "《基于双直角分束器的反射式静态傅里叶光谱仪光学***》", 《光学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931298A (en) * | 2018-08-31 | 2018-12-04 | 中国科学院光电研究院 | A kind of compact high throughput high stability inteference imaging spectrometer |
| CN108931298B (en) * | 2018-08-31 | 2020-10-20 | 中国科学院光电研究院 | Compact high-flux high-stability interference imaging spectrometer |
| CN110989142A (en) * | 2019-12-30 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
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