WO2012176851A1 - 分光装置 - Google Patents
分光装置 Download PDFInfo
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- WO2012176851A1 WO2012176851A1 PCT/JP2012/065897 JP2012065897W WO2012176851A1 WO 2012176851 A1 WO2012176851 A1 WO 2012176851A1 JP 2012065897 W JP2012065897 W JP 2012065897W WO 2012176851 A1 WO2012176851 A1 WO 2012176851A1
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- Prior art keywords
- temperature
- light source
- detected
- spectroscope
- heating
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- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 238000002835 absorbance Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 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
- G01J3/02—Details
-
- 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
- G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
-
- 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
- G01J3/02—Details
- G01J3/0291—Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
-
- 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
-
- 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
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/023—Controlling conditions in casing
- G01N2201/0231—Thermostating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/121—Correction signals
- G01N2201/1211—Correction signals for temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/74—Optical detectors
Definitions
- the present invention relates to a spectroscopic device including a lamp house in which a light source is housed, and a spectroscope for splitting light from the lamp house.
- FIG. 5 is a diagram schematically showing the configuration of a conventional spectroscopic device.
- a liquid chromatograph PDA photodiode array
- absorbance detector having a multi-wavelength detection function
- the spectroscopic device includes a lamp house 1 and a spectroscope 3.
- a light source 5 is provided inside the lamp house 1. The light emitted from the light source 5 is applied to the spectroscope 3 through a window plate (not shown).
- the spectroscope 3 is provided with a window plate (not shown), a condenser mirror 7, a flow cell 9, a condenser mirror 11, a slit 13, a concave diffraction grating 15, and a photodiode array 17 in the order in which light passes. .
- the lamp house 1 and the spectroscope 3 are arranged with a spacer 19 having an aperture for passing light therebetween.
- the spectroscopic device is provided with a fan 21 for cooling the lamp house 1.
- the lamp house 1 and the fan 21 are provided to reduce a change in the amount of light emitted from the light source 5 due to a change in the ambient temperature of the apparatus.
- the amount of light emitted from the light source 5 varies depending on the temperature change of the light source 5.
- the light source 5 is housed in the lamp house 1 having a somewhat large heat capacity. By cooling with air and radiating heat, the temperature of the light source 5 is made difficult to change even if the ambient temperature of the apparatus changes.
- the spectroscopic device shown in FIG. 5 irradiates the flow cell 9 with light emitted from the light source 5, and splits the light that has passed through the flow cell 9 onto the photodiode array 17 by the diffraction grating 15, thereby flowing into the flow cell 9.
- This is an apparatus for measuring the absorption spectrum of an analysis sample.
- the spectroscope 3 when the light source 5 is turned on from the extinguished state, the spectroscope 3 is thermally expanded due to heat generated by the light source 5, and the optical axis fluctuates in the spectroscope 3. As a result, it takes time until the baseline of the chromatogram is stabilized after the light source 5 is turned on.
- Such problems are not limited to PDA absorbance detectors for liquid chromatographs, but include lamp houses and spectroscopes such as absorption spectrophotometers, fluorescence spectrophotometers, liquid chromatograph UV detectors, and fluorescence detectors.
- spectroscopic devices that is, in a light source device including a lamp house and a spectroscope, there is a problem that it takes a certain amount of time for the optical axis to stabilize in the spectroscope after the light source is turned on.
- the present invention relates to a spectroscopic device including a lamp house in which a light source is housed and a spectroscope for splitting light from the lamp house until the optical axis is stabilized in the spectroscope after the light source is turned on.
- the purpose is to shorten the time.
- a spectroscopic device is a spectroscopic device including a lamp house in which a light source is housed, and a spectroscope for splitting light from the lamp house, and measures the temperature of the spectroscope.
- a storage means for storing, and a control section for controlling the operation of the heating means, wherein the control section detects the temperature detected by the temperature measuring means when the light source is turned on from a light-off state. The heating means is operated until the detected temperature stored in the storage means is reached.
- the spectroscopic device of the present invention when the light source is turned on from the extinguished state, the spectroscope is heated by the heat from the lamp house, and the detected temperature of the temperature measuring means becomes the detected temperature stored in the storing means. In the meantime, it is also heated by the heating means.
- the spectroscopic device of the present invention further includes a fan for cooling the lamp house, and the control unit stops the fan when the light source is turned on from a light-off state, and detects the temperature measuring means.
- the fan may be operated at a predetermined number of revolutions after the temperature reaches the detected temperature stored in the storage means. Thereby, the temperature rise of the lamp house is promoted as compared with the case where the fan is operated immediately after the light source is turned on.
- the fan may be operated at the predetermined rotational speed until the detected temperature of the temperature measuring means reaches the detected temperature stored in the storage means, You may operate
- the storage means includes the spectroscopic unit for each temperature measuring means.
- the detected temperature of the temperature measuring means when the optical axis is stable in the chamber is stored, and the control unit operates a plurality of the heating means based on the detected temperatures of the corresponding temperature measuring means. May be.
- the storage means detects the temperature detected by the temperature measuring means with the operation of the heating means after the light source is turned on from the off state.
- the time until the detected temperature is reached when the optical axis is stable in the chamber is stored, and the control unit operates the heating unit based on the time stored in the storage unit. Also good.
- the spectroscope is suitable as in the case where the operation of the heating unit is operated based on the temperature detected by the temperature measurement unit. The time from when the light source is turned on until the optical axis is stabilized by the spectroscope is shortened.
- the spectroscopic device of the present invention is a spectroscopic device including a lamp house in which a light source is housed and a spectroscope for splitting light from the lamp house, and a temperature measurement for measuring the temperature of the spectroscope.
- Means heating means for heating the spectroscope, storage means for storing the temperature detected by the temperature measuring means when the optical axis is stable in the spectroscope when the light source is lit, And a control unit for controlling the operation of the heating means. Then, when the light source is turned on from the extinguished state, the control unit operates the heating unit until the detected temperature of the temperature measuring unit reaches the detected temperature stored in the storage unit.
- the spectroscope is heated by the heat from the lamp house after the light source is turned on from the extinguished state, and is heated until the detected temperature of the temperature measuring means becomes the detected temperature stored in the storage means. It is also heated by means. And compared with the case where there is no heating by the heating means, the temperature distribution of the spectrometer when the optical axis is stable in the spectrometer is reproduced earlier, and the optical axis is stabilized in the spectrometer after the light source is turned on. The time until is shortened.
- FIG. 1 is a diagram schematically showing a configuration of one embodiment.
- a liquid chromatograph PDA absorbance detector having a multi-wavelength detection function will be described as an example of a spectroscopic device.
- the spectroscopic device includes a lamp house 1 and a spectroscope 3.
- a light source 5 is provided inside the lamp house 1.
- the casing constituting the lamp house 1 is made of, for example, aluminum.
- a discharge lamp such as a deuterium lamp or a tungsten lamp is used.
- the light emitted from the light source 5 is applied to the spectroscope 3 through a window plate (not shown) and a spacer 19.
- the spectroscope 3 is provided with a window plate (not shown), a condenser mirror 7, a flow cell 9, a condenser mirror 11, a slit 13, a concave diffraction grating 15, and a photodiode array 17 in the order in which light passes. .
- the casing constituting the spectroscope 3 is made of aluminum, for example.
- Light from the lamp house 1 is collected by the flow cell 9 by the condenser mirror 7.
- the light transmitted through the flow cell 9 is collected by the condenser mirror 11 into the slit 13.
- the light that has passed through the slit 13 is split by the diffraction grating 15.
- the photodiode array 17 detects the light intensity of light having a plurality of wavelengths from the diffraction grating 15.
- the lamp house 1 and the spectroscope 3 are arranged with a spacer 19 having an aperture for passing light therebetween.
- the spacer 19 is made of, for example, stainless steel.
- the spectroscopic device is provided with a fan 21 for cooling the lamp house 1.
- a thermistor 23 and a heater 25 are provided on the outer surface of the spectroscope 3.
- the thermistor 23 constitutes temperature measuring means for measuring the temperature of the spectrometer 3.
- the heater 25 constitutes a heating means for heating the spectrometer 3.
- Storage means 27 is provided for storing the detected temperature of the thermistor 23 when the optical axis is stable in the spectroscope 3 when the light source 5 is turned on.
- a control unit 29 for controlling the operation of the heater 25 is provided. The control unit 29 also controls the operation of the fan 21.
- the control unit 29 operates the heater 25 to heat the spectrometer 3.
- the control unit 29 operates the heater 25 until the detected temperature of the thermistor 23 reaches the detected temperature stored in the storage unit 27. Thereby, the spectroscope 3 is heated by the heat from the lamp house 1 and also by the heater 25. At this time, the control unit 29 keeps the fan 21 in a stopped state. Thereby, the temperature rise of the lamp house 1 is promoted compared with the case where the lamp 21 is cooled by operating the fan 21 immediately after the light source 5 is turned on.
- the control unit 29 stops the operation of the heater 25 and stops the heating of the spectrometer 3 by the heater 25. At the same time, the control unit 29 operates the fan 21 at a predetermined rotational speed to stabilize the temperature of the lamp house 1.
- FIG. 2 is a diagram showing the baseline fluctuation of the chromatogram after the light source is turned on
- FIG. 3 is a diagram showing the baseline fluctuation of the chromatogram after the light source is turned on according to the prior art shown in FIG. 2 and 3, the vertical axis represents absorbance (arbitrary unit (mAU)), and the horizontal axis represents time (minutes).
- the chromatograms of FIGS. 2 and 3 are obtained by detecting absorbance at wavelengths of, for example, 250 nm (nanometer) and 4 nm.
- the detected temperature of the thermistor 23 reached the detected temperature stored in the storage means 27 in about 10 minutes (heating period) from the start of lighting of the light source 5.
- the fan 21 is stopped for 10 minutes (heating period) from the start of lighting of the light source 5.
- the baseline is stable when the fluctuation range of the baseline of the chromatogram is 0.5 mAU / h or less.
- FIG. 3 in the related art, it took about 75 minutes from the start of lighting of the light source 5 until the baseline was stabilized (stable period).
- FIG. 2 in the example, it was about 15 minutes from the start of lighting of the light source 5 until the baseline was stabilized (stable period).
- the time from the start of lighting of the light source 5 to the stabilization of the baseline, that is, the optical axis is stabilized by the spectroscope 3 from the start of lighting of the light source 5, as compared with the prior art. It was possible to shorten the time until.
- FIG. 4 is a diagram schematically showing the configuration of another embodiment. 4, parts having the same functions as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- This embodiment further includes a thermistor 31 and a heater 33 as compared with the embodiment of FIG.
- the set of the thermistor 31 and the heater 33 is for measuring the temperature of the spectroscope 3 and heating at a position different from the set of the thermistor 23 and the heater 25.
- the storage means 27 stores, for each thermistor 23, 31, the detected temperature of the thermistor 23, 31 when the optical axis is stable in the spectrometer 3.
- the control unit 29 operates the heaters 25 and 33 when the light source 5 is turned on from the off state.
- the control unit 29 keeps the fan 21 in a stopped state.
- the control unit 29 stops the heater 25 when the detected temperature of the thermistor 23 reaches the corresponding detected temperature stored in the storage means 27.
- the control unit 29 stops the heater 33 when the detected temperature of the thermistor 31 reaches the corresponding detected temperature stored in the storage unit 27. Further, the control unit 29 makes the temperature of the lamp house 1 stable when one of the detected temperatures of the thermistors 23 and 31 reaches the corresponding detected temperature stored in the storage means 27 or when both of them reach.
- the fan 21 is operated at a predetermined rotational speed.
- the temperature distribution of the spectroscope 3 when the optical axis is stable in the spectroscope 3 can be reproduced more quickly than when the thermistor and the heater are one set.
- the time until the optical axis is stabilized in the spectroscope 3 is further shortened.
- two sets of thermistors and heaters are provided.
- the number of sets of thermistors and heaters may be three or more.
- the arrangement of the thermistor 23 and the heater 25 shown in FIGS. 1 and 4 and the arrangement of the thermistor 31 and the heater 33 shown in FIG. 4 are examples, and the arrangement position of the thermistor and heater set is arbitrary. .
- the operation of the fan 21 is controlled based on the temperature detected by the thermistor 23 or 31.
- the present invention is not limited to this.
- lamp house temperature measuring means for measuring the temperature of the lamp house 1 is further provided, and the fan 21 is provided when the temperature of the lamp house 1 reaches a predetermined temperature as disclosed in Patent Document 1. It may be operated at a predetermined rotational speed.
- the operation of the fan 21 is controlled by the control unit 29, for example. Thereby, it is prevented that the lamp house 1 is heated more than necessary. Furthermore, the time until the lamp house 1 is stabilized at a predetermined temperature is shortened.
- the storage means 27 instead of the detected temperature of the thermistors 23, 31, the detected temperatures of the thermistors 23, 31 are stored in the spectrometer 3 with the operation of the heaters 25, 33 after the light source 5 is turned on from the off state.
- the time until the detected temperature when the optical axis is stable may be stored.
- the control unit 29 operates the heaters 25 and 33 from the start of lighting of the light source 5 based on the time stored in the storage unit 27.
- the spectroscope 3 is appropriately heated in the same manner as when the heaters 25 and 33 are operated based on the temperature detected by the thermistors 23 and 31, and the spectroscope 3 is started after the light source 5 is turned on.
- the time until the optical axis is stabilized can be shortened.
- the thermistors 23 and 31 and the heaters 25 and 33 are arranged on the outer surface of the spectroscope 3, but the thermistors 23 and 31 and the heaters 25 and 33 may be arranged inside the spectroscope 3. Good.
- the thermistors 23 and 31 are used as temperature measuring means, and the heaters 25 and 33 are used as heating means.
- the temperature measuring means may have any configuration as long as it can measure the temperature of the spectrometer 3 at a predetermined location.
- the heater may have any configuration as long as it can heat the spectroscope 3 at a predetermined location.
- the configuration of the lamp house 1 and the configuration of the spectroscope 3 shown in the above embodiment are examples.
- the lamp house may include a condenser lens.
- the present invention is applied to a PDA absorbance detector for liquid chromatograph, but the spectroscopic device to which the present invention is applied is not limited to this.
- the present invention is applicable to a spectroscopic device including a lamp house in which a light source is housed and a spectroscope for splitting light from the lamp house.
- the present invention can be applied to, for example, an absorption spectrophotometer, a fluorescence spectrophotometer, a UV detector of a liquid chromatograph, a fluorescence detector, and the like.
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Abstract
Description
ランプハウス1の内部に光源5が備えられている。光源5から放射された光は窓板(図示は省略)を介して分光器3に照射される。
ランプハウス1と分光器3は、光通過のための開孔を有するスペーサ19を挟んで配置されている。
ランプハウス1及びファン21は、装置の周囲温度の変化によって光源5の放射光量が変化することを低減するために備えられている。一般に、光源5の放射光量は光源5の温度変化によって変動する。光源5の光量が変動するとフォトダイオードアレイ17の出力値が変動するので高感度測定が阻害される要因となる。そこで、装置の周囲温度の変化によってフォトダイオードアレイ17の出力値が変動するのを防ぐために、光源5はある程度大きな熱容量をもったランプハウス1内に収納され、ランプハウス1がファン21によって一定風量で空冷されて放熱されることによって、装置の周囲温度が変化しても光源5の温度は変化しにくいようにされている。
しかしながら、光源点灯後にランプハウス1の温度が所定温度に上昇するまでの時間が短縮されても、分光器3内の温度分布が安定するまでに時間がかかるので、分光器3内で光軸が安定してクロマトグラムのベースラインが安定するまでにある程度の時間がかかってしまっていた。
本発明の分光装置において、光源が消灯状態から点灯されたときに、分光器はランプハウスからの熱によって加熱されるとともに、温度測定手段の検出温度が記憶手段に記憶された検出温度になるまでの間、加熱手段によっても加熱される。
ランプハウス1の内部に光源5が備えられている。ランプハウス1を構成する筐体は例えばアルミニウムによって形成されている。光源5としては、重水素ランプ等の放電灯やタングステンランプ等が使用される。光源5から放射された光は窓板(図示は省略)とスペーサ19を介して分光器3に照射される。
また、分光装置には、ランプハウス1を冷却するためのファン21が設けられている。
光源5が点灯されている状態において分光器3内で光軸が安定している時のサーミスタ23の検出温度を記憶するための記憶手段27が設けられている。
ヒーター25の動作を制御するための制御部29が設けられている。制御部29はファン21の動作も制御する。
光源5が消灯状態から点灯されたとき、制御部29はヒーター25を動作させて分光器3を加熱する。制御部29はサーミスタ23の検出温度が記憶手段27に記憶された検出温度になるまでの間、ヒーター25を動作させる。これにより、分光器3は、ランプハウス1からの熱によって加熱されるとともに、ヒーター25によっても加熱される。
このとき、制御部29はファン21を停止状態にさせておく。これにより、光源5の点灯直後からファン21が動作されてランプハウス1が冷却される場合に比べて、ランプハウス1の温度上昇が促進される。
記憶手段27は、サーミスタ23,31ごとに、分光器3内で光軸が安定している時のサーミスタ23,31の検出温度を記憶する。
制御部29は、光源5が消灯状態から点灯されたとき、ヒーター25,33を動作させる。また、制御部29はファン21を停止状態にさせておく。
なお、図1及び図4に示されたサーミスタ23及びヒーター25の配置、ならびに図4に示されたサーミスタ31及びヒーター33の配置は一例であり、サーミスタ及びヒーターの組の配置位置は任意である。
上記実施例では、サーミスタ23又は31の検出温度に基づいてファン21の動作を制御している。しかし、本発明はこれに限定されるものではない。例えば、ランプハウス1の温度を測定するためのランプハウス用温度測定手段がさらに設けられ、ファン21は、特許文献1に開示されたように、ランプハウス1の温度が所定の温度に到達したときに所定の回転数で動作されるようにしてもよい。ファン21の動作は例えば制御部29によって制御される。これにより、ランプハウス1が必要以上に加熱されることが防止される。さらに、ランプハウス1が所定の温度で安定するまでの時間が短縮される。
3 分光器
5 光源
21 ファン
23,31 サーミスタ(温度測定手段)
25,33 ヒーター(加熱手段)
27 記憶手段
29 制御部
Claims (4)
- 光源が内部に収容されたランプハウスと、
そのランプハウスからの光を分光するための分光器と、
前記分光器の温度を測定するための温度測定手段と、
前記分光器を加熱するための加熱手段と、
前記光源が点灯されている状態において前記分光器内で光軸が安定している時の前記温度測定手段の検出温度を記憶するための記憶手段と、
前記加熱手段の動作を制御し、前記光源が消灯状態から点灯されたときに、前記温度測定手段の検出温度が前記記憶手段に記憶された検出温度になるまでの間、前記加熱手段を動作させるように構成された制御部と、を備えていることを特徴とする分光装置。 - 前記ランプハウスを冷却するためのファンをさらに備え、
前記制御部は、前記光源が消灯状態から点灯されたときに前記ファンを停止させておき、前記温度測定手段の検出温度が前記記憶手段に記憶された検出温度に到達した後に前記ファンを所定の回転数で動作させる請求項1に記載の分光装置。 - 互いに異なる位置で前記分光器の温度測定及び加熱を行なう前記温度測定手段及び前記加熱手段の組を複数組備え、
前記記憶手段は前記温度測定手段ごとに前記分光器内で光軸が安定している時の前記温度測定手段の検出温度を記憶し、
前記制御部は、複数の前記加熱手段を対応する前記温度測定手段の検出温度に基づいて動作させる請求項1又は2に記載の分光装置。 - 前記記憶手段には、前記検出温度に替えて、前記光源が消灯状態から点灯された後に前記加熱手段の動作をともなって前記温度測定手段の検出温度が前記分光器内で光軸が安定している時の検出温度になるまでの時間が記憶されており、
前記制御部は前記記憶手段に記憶された前記時間に基づいて前記加熱手段を動作させる請求項1から3のいずれか一項に記載の分光装置。
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