WO2014166015A1 - Small temperature-stabilized spectrograph - Google Patents
Small temperature-stabilized spectrograph Download PDFInfo
- Publication number
- WO2014166015A1 WO2014166015A1 PCT/CN2013/000483 CN2013000483W WO2014166015A1 WO 2014166015 A1 WO2014166015 A1 WO 2014166015A1 CN 2013000483 W CN2013000483 W CN 2013000483W WO 2014166015 A1 WO2014166015 A1 WO 2014166015A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- base
- bottom plate
- temperature
- thermal expansion
- gap
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 230000000717 retained effect Effects 0.000 claims 1
- 230000003595 spectral effect Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 13
- 230000000703 anti-shock Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006094 Zerodur Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- G01J3/0286—Constructional arrangements for compensating for fluctuations caused by temperature, humidity or pressure, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a spectrometer, e.g. vacuum
-
- 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
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
Definitions
- the present invention relates to a spectrometer, and more particularly to a compact spectrometer that is stable over a wide temperature range. Background technique
- the technical problem to be solved by the present invention is to provide a small spectrometer with high temperature stability, low spectral drift and stable spectral resolution over a large temperature range.
- a temperature-stable small spectrometer comprising a base and an optical element, the optical element being fixed on a bottom plate having a thermal expansion coefficient lower than a thermal expansion coefficient of the base, and The coefficients of thermal expansion differ by an order of magnitude or more, and a portion of the bottom plate is rigidly attached to the base while the remainder of the bottom plate has a gap with the base.
- the partial area is preferably as small as possible, as long as the bottom plate can be stably supported on the base.
- the partial position is not limited to the middle of the bottom plate, but may be at other positions, but preferably located in the middle portion of the bottom plate, as long as the stable rigidity of the bottom plate is supported on the base, and the local portion is located in the non-intermediate region.
- the thermal expansion coefficient of the base material is generally on the order of 10 ⁇ 5 / ⁇ , and the thermal expansion coefficient of the base material is generally on the order of i (r 6 rc.
- the optical elements are fixed on a bottom plate with a low coefficient of thermal expansion, their distance and angle with each other The amount of temperature change will be reduced by more than 10 times than they are fixed on a base with a high coefficient of thermal expansion.
- the bottom plate has only a small area of local rigidity fixed to the base, the shape and size of the base will not change with temperature.
- the optical element is also made of a material having a low expansion coefficient to reduce its optical performance due to temperature.
- the rigid connection is specifically: the middle of the base has a protrusion toward the bottom plate, and the protrusion is rigidly fixed to the bottom plate or fixed by a fastener to form the rigid connection.
- This implementation is simple and robust.
- a through hole is formed in a middle portion of the bottom plate, and the base has a protruding portion extending into the through hole, and a fastener passes through the through hole and It is fixed to the projection to rigidly connect the bottom plate and the base there.
- the bottom plate and the base are softly connected by the adhesive at the gap to achieve better anti-shock and anti-shock effects.
- the periphery of the bottom plate is softly connected to the base by the adhesive, and the remaining portion retains the gap.
- the bottom plate only selects a plurality of points around it to be softly connected to the base through the adhesive, and the remaining portion retains the gap, that is, the bottom plate and the base are only around the bottom plate.
- the gap is softly connected by a discontinuous adhesive.
- the invention has the advantages that: the temperature stable small spectrometer, since the optical component is mounted on the bottom plate of the low expansion coefficient material, and the bottom plate is only partially rigidly connected with the base, thereby greatly reducing the optical components.
- the relative position varies with temperature; in addition, if the optical element also uses a low expansion coefficient material, it will further greatly reduce its optical properties as a function of temperature.
- the spectral shift of the small spectrometer due to the change in temperature and the instability of the optical characteristics are greatly improved, so that the compact spectrometer has a large temperature use range.
- the bottom plate and the base are connected by a combination of a rigid connection and a soft connection, so that the change in shape and size of the base with temperature can not be transmitted to the bottom plate on which the relevant optical component is mounted, and can also The effect of buffering external vibrations makes the small spectrometer have stable performance over a wide temperature range.
- Figure 1 is a schematic diagram of the principle of the small spectrometer of the present invention.
- FIG. 2 is a schematic diagram of the principle of another small spectrometer according to the present invention.
- Figure 3 is a first embodiment of the connection of the bottom plate to the base of the present invention.
- Figure 4 is a second embodiment of the connection of the bottom plate to the base of the present invention.
- Figure 5 is a third embodiment of the connection of the bottom plate to the base of the present invention.
- Figure 6 is a fourth embodiment of the connection of the bottom plate to the base of the present invention.
- Figure 7 is a fifth embodiment of the connection of the bottom plate to the base of the present invention. detailed description
- the compact spectrometer of the present invention may employ a planar reflection grating, a planar transmission grating, a concave reflection grating or other dispersive elements.
- the compact spectrometer adopts a Czemry-Tumer system of a planar reflection grating, including an incident slit 10, and a reflective collimating mirror 20 disposed on the optical path in the incident slit 10, and a planar reflective grating.
- Reflective convergence mirror 40 and detector 50 The incident slit 10 and the detector 50 are fixed to the bottom plate 1 through the base, and other optical components are directly fixed to the bottom plate 1.
- Fig. 2 is a spectrometer system utilizing a flat field concave grating, including an entrance slit 10', a flat field concave grating 30', and a detector 50'.
- the incident slit 10', the flat field concave grating 30', and the detector 50' are both fixed to the base plate 1 by respective bases.
- the bottom plate 1 is made of a material having a low expansion coefficient, and at least a material having an expansion coefficient lower than that of the base is used, and all the optical components are fixed to the bottom plate 1 and then the bottom plate 1 is It is attached to the base 2 made of metal or plastic.
- the bottom plate 1 may be made of glass ceramic (Zerodur), or Corning's ULE ultra-low thermal expansion coefficient glass material, or borosilicate glass (pyrex), fused silica, carbon fiber reinforced composite material (Carbon Fiber Reinforced Polymer/Plastic, CFRP). , or some metal, such as Invar.
- the base can be made of materials with a thermal expansion coefficient of the order of 10' 5 /°C.
- FIG. 3-7 the connection between the bottom plate 1 and the base 2 made of the low expansion coefficient material is shown.
- a portion 11 of the base plate 1 is rigidly coupled to the base 2, the portion 11 being located in the intermediate portion of the bottom plate.
- the other portions of the bottom plate 1 have a gap 23 with the base 2 without being in contact with each other.
- the middle portion of the base 2 has a protrusion 21 rigidly fixed to the bottom plate 1, and a gap 23 is maintained between the other portion of the bottom plate 1 and the base 2 or is softly connected by injecting the adhesive 3 into the gap 23. .
- the middle portion of the base 2 has a protrusion 21 and a bottom plate 1 which are rigidly connected to each other by fasteners 22 such as screws and washers, and a gap 23 is maintained between the other portion of the bottom plate 1 and the base 2. Or by injecting a glue 3 into the gap 23 for a soft connection.
- a middle portion of the bottom plate 1 is provided with a through hole 12 having a protrusion 24 extending into the through hole 12, and a fastener 22 such as a screw and a washer passing through the through hole 12 And being fixed to the protruding portion 24, the bottom plate 1 and the base 2 are rigidly connected thereto, and a gap 23 is maintained between the other portion of the bottom plate 1 and the base 2 or is softly connected by injecting the adhesive 3 into the gap 23.
- the projection 21 may be provided on the bottom plate 1 and extend from the bottom plate 1 toward the base 2. And those skilled in the art can also understand that other fastening methods can be used as long as one (small area) rigid connection between the bottom plate 1 and the base 2 is maintained, and the other parts of the bottom plate 1 and the base 2 are maintained.
- the gap 23 may be softly connected by injecting the adhesive 3 into the gap 23.
- the adhesive 3 can be filled in the gap 23, but it is preferable to partially inject the adhesive 3.
- the adhesive 3 is only softly connected at the gap around the bottom plate.
- the flexible adhesive 3 is only softly connected at the gap around the bottom plate.
- This temperature-stable small spectrometer can be used not only in the above two spectral systems, but also in other types of small spectrometer systems.
- the temperature-stable small spectrometer because the optical component is mounted on the bottom plate of the low expansion coefficient material, greatly reduces the amount of change of the relative position between the optical components with temperature; in addition, the optical component also uses a material with a low expansion coefficient. In this case, it will greatly reduce its optical performance as a function of temperature.
- the small spectrometer is not easy to cause spectral line drift and spectral analyzer resolution due to temperature changes, so that the small spectrometer has a large temperature range and high stability.
- the bottom plate and the base are connected by a combination of a rigid connection and a soft connection, so that the change of the shape and the size of the base with temperature can not be transmitted to the bottom plate with the relevant optical component, and can also buffer the outside world.
- the effect of the vibration makes the compact spectrometer have stable performance over a wide temperature range.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201320171438 CN203191077U (en) | 2013-04-08 | 2013-04-08 | Small temperature-stabilized spectrograph |
CN201320171438.7 | 2013-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014166015A1 true WO2014166015A1 (en) | 2014-10-16 |
Family
ID=49107930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2013/000483 WO2014166015A1 (en) | 2013-04-08 | 2013-04-27 | Small temperature-stabilized spectrograph |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN203191077U (en) |
WO (1) | WO2014166015A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1762162A (en) * | 2003-04-03 | 2006-04-19 | 汤姆森许可公司 | Apparatus and method for isolating optics from thermal expansion |
CN1940609A (en) * | 2005-09-30 | 2007-04-04 | 优迪那半导体有限公司 | Optical module |
JP2010256670A (en) * | 2009-04-27 | 2010-11-11 | Konica Minolta Sensing Inc | Diffraction grating, spectroscopic unit using the same, spectrometer, and method for preparing diffraction grating |
CN202305014U (en) * | 2011-07-21 | 2012-07-04 | 中国科学院上海技术物理研究所 | Low temperature infrared interferometer |
-
2013
- 2013-04-08 CN CN 201320171438 patent/CN203191077U/en not_active Expired - Lifetime
- 2013-04-27 WO PCT/CN2013/000483 patent/WO2014166015A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1762162A (en) * | 2003-04-03 | 2006-04-19 | 汤姆森许可公司 | Apparatus and method for isolating optics from thermal expansion |
CN1940609A (en) * | 2005-09-30 | 2007-04-04 | 优迪那半导体有限公司 | Optical module |
JP2010256670A (en) * | 2009-04-27 | 2010-11-11 | Konica Minolta Sensing Inc | Diffraction grating, spectroscopic unit using the same, spectrometer, and method for preparing diffraction grating |
CN202305014U (en) * | 2011-07-21 | 2012-07-04 | 中国科学院上海技术物理研究所 | Low temperature infrared interferometer |
Also Published As
Publication number | Publication date |
---|---|
CN203191077U (en) | 2013-09-11 |
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