WO2016147271A1 - フーリエ変換型分光光度計 - Google Patents
フーリエ変換型分光光度計 Download PDFInfo
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- WO2016147271A1 WO2016147271A1 PCT/JP2015/057584 JP2015057584W WO2016147271A1 WO 2016147271 A1 WO2016147271 A1 WO 2016147271A1 JP 2015057584 W JP2015057584 W JP 2015057584W WO 2016147271 A1 WO2016147271 A1 WO 2016147271A1
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- movable
- movable part
- speed
- external force
- moving
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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
- G01J3/28—Investigating the spectrum
- G01J3/45—Interferometric spectrometry
- G01J3/453—Interferometric spectrometry by correlation of the amplitudes
- G01J3/4535—Devices with moving mirror
-
- 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
- G01J3/0202—Mechanical elements; Supports for optical elements
-
- 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
- G01J3/027—Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
-
- 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
- G01J3/0275—Details making use of sensor-related data, e.g. for identification of sensor parts or optical elements
-
- 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
- G01J3/0289—Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking
-
- 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
- G01J3/06—Scanning arrangements arrangements for order-selection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
-
- 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
- G01J3/06—Scanning arrangements arrangements for order-selection
- G01J2003/064—Use of other elements for scan, e.g. mirror, fixed grating
Definitions
- the present invention relates to a Fourier transform type spectrophotometer.
- FTIR Fast Transform Infrared Spectroscope
- the infrared light from the infrared light source is split into two by a beam splitter and one is irradiated to the fixed mirror and the other to the moving mirror. These reflected lights are again guided to the same optical path to cause interference.
- This interference light is irradiated to the sample to be measured, the transmitted light or reflected light is detected and Fourier transformed to create a spectrum, and the qualitative analysis and quantitative analysis of the sample from the peak wavelength, peak intensity, etc. of this spectrum I do.
- FTIR usually includes a control interference system as an optical system different from the above optical system for measuring light (infrared light) for irradiating a sample.
- the control interference system shares the beam splitter, fixed mirror, and moving mirror with the measurement light optical system, and has a laser light source and a laser light detector for the control interference system. Interference light is generated by passing laser light. Based on the interference signal of the laser beam, the current position and speed of the movable mirror are calculated.
- the movable mirror is fixed to a movable part that can reciprocate on the guide, and the movable part is driven by a driving motor.
- a driving force is applied to the movable part from the drive motor, a force (movement resistance) that hinders movement due to a frictional force, a viscous resistance of a lubricant, or the like is generated at the sliding part of the movable part and the guide part. Therefore, by changing the voltage of the driving motor, the driving force to the movable part is changed and the moving speed is adjusted.
- Patent Document 1 As a method for controlling the speed of such a moving mirror, feedback control may be used as in Patent Document 1.
- Patent Document 1 As shown in FIG. 6, light from a laser light source 551 is caused to interfere with a moving mirror 541 and a fixed mirror 544, and the intensity of the interference light is measured with a photodiode 552. Calculate the speed.
- the control unit 530 applies a driving voltage to the driving motor 520 by feedback control based on PID control (Proportional-Integral-Derivative Control) based on the deviation between the measured speed and the target speed, and adjusts the speed of the movable mirror 541. ing.
- PID control Proportional-Integral-Derivative Control
- the speed of the moving mirror may change when a foreign substance such as fine dust enters the sliding portion.
- a foreign object enters the sliding portion
- the moving resistance increases when the movable part contacts and moves over the foreign object, and the speed of the movable mirror temporarily decreases.
- the control device performing feedback control increases the drive voltage of the drive motor and tries to return the speed of the movable mirror to the target speed.
- the movement resistance decreases, the force from the driving motor becomes larger than the movement resistance, and the moving mirror is accelerated.
- the control device decreases the voltage of the drive motor to decelerate the movable mirror.
- the feedback control cannot cope with such a speed change, there are problems such as a temporary stop of the movable mirror and a divergence of the control.
- the moving speed of the moving mirror may be set to a low speed.
- the drive motor is often operated at a low voltage. In such a case, even when a small foreign object enters the sliding portion, the amount of change in the voltage with respect to the original voltage becomes relatively large, and the above-described feedback control problem becomes particularly noticeable.
- the problem to be solved by the present invention is to provide a Fourier transform spectrophotometer capable of stably controlling the speed of the moving mirror and performing high-precision measurement.
- the Fourier transform spectrophotometer made to solve the above problems is a) a movable part with a fixed moving mirror; b) external force applying means for applying an external force larger than the moving resistance of the movable part to the movable part; c) a driving source for applying a positive or negative driving force along the moving direction of the movable part to the movable part; d) a speed measuring unit for measuring the moving speed of the movable part; e) a driving force control unit that controls the driving force of the driving source so that the movable unit moves in a predetermined manner based on the moving speed.
- the movable part is applied with the movement resistance, the external force from the external force applying means, and the driving force from the driving source, and the resultant force moves the movable part.
- the driving force control unit applies the controlled driving force to the resultant force of the moving resistance and the external force based on the measurement result of the speed measuring unit so that the movement of the movable unit becomes a predetermined mode.
- the resultant force is made zero by applying a driving force in the direction opposite to the direction of the external force, and the movable portion is kept stationary or moved at a constant speed.
- the movable part is shifted from the stationary state to the moving state by increasing or decreasing the driving force from the state where the resultant force is zero.
- the driving force applied to the movable part may be the same as the moving direction of the movable part, or may be opposite.
- the former case is a positive driving force
- the latter case is a negative driving force.
- the driving force necessary to move the movable part at a constant speed is due to the influence of external force compared to the driving force of the prior art in part or all of the moving range of the movable mirror. growing. Therefore, even if there is a sudden change in the moving speed of the movable part for some reason, the amount of change in the driving force due to the adjustment can be made relatively small.
- Gravity can be used as the external force applying means. This is because the direction of movement of the movable part is set to be a direction that is up and down with respect to gravity, and the direction of the driving force applied by the drive source to the movable part is set to be a direction against gravity. Can be realized.
- a Fourier transform spectrophotometer made to solve the above problems is a) A movable part with a movable mirror fixed and movable on the guide; b) Inclining means for inclining the guide so that a component force in a direction along the guide of gravity of the movable portion is larger than a movement resistance of the movable portion on the guide; c) a driving source for applying a positive or negative driving force along the moving direction of the movable part on the guide; d) a speed measuring unit for measuring the moving speed of the movable part; e) A driving force control unit that controls the driving force of the driving source so that the movable unit moves on the guide in a predetermined manner based on the moving speed.
- the movable part since the movable part is movable on the guide and the guide is inclined, the movable part always has a component force in the direction along the guide of its own weight (gravity). It is given downward along the guide. This is the external force. Further, the external force applied to the movable part can be adjusted by changing the inclination angle of the guide.
- an external force applying means a configuration in which the movable part or the movable part in the drive source is urged by an elastic member can be used.
- the force applied from the elastic member to the movable part or the like becomes an external force.
- the external force applied to the movable part or the like can be adjusted by appropriately selecting the elastic coefficient of the elastic member (for example, the spring constant of the spring to be used when a spring is used).
- the driving force of the driving source is adjusted by applying an external force from the external force applying means to the movable part. Therefore, even when a speed fluctuation occurs due to the intrusion of foreign matter, feedback control is achieved by reducing the amount of change relative to the driving force before the speed fluctuation in part or all of the moving range of the movable mirror. Is also stable and can suppress the divergence of control. In addition, when the feedback control is stabilized, the speed change of the movable portion is reduced, so that the speed of the movable mirror can be easily kept constant, and the apparatus life is extended because there is no sudden speed change.
- FIG. 1 is a schematic configuration diagram of a Fourier transform infrared spectrophotometer according to the present invention. It is a figure which shows the structure of the movable mirror which concerns on 1st Example, and an external force provision means, (a) is a figure which shows the force by the dead weight of a movable mirror, (b) shows the state which the movable mirror is moving upwards.
- FIG. 3C is a diagram showing a state where the movable mirror is moving downward.
- FIG. 7 is a diagram illustrating a movable mirror and an external force applying unit according to a fourth embodiment, where (a) illustrates a state in which the movable mirror is at the movement center, and (b) illustrates a state in which the movable mirror has moved to the beam splitter side.
- FIG. 9B is a diagram showing a state where the movable mirror has moved to the voice coil motor side.
- FIG. 1 a first embodiment of the Fourier transform type spectrophotometer according to the present invention will be described with reference to FIGS. 1 and 2.
- FIG. 1 the infrared light from the infrared light source 143 is divided into two by a beam splitter 142, and the fixed mirror 144 and the movable mirror 141 are irradiated. These reflected lights are again guided to the same optical path to cause interference.
- the interference light is applied to the sample in the sample chamber 145, the transmitted light is detected by the infrared light detector 146, and a spectrum is created by Fourier-transforming the detected signal by the analyzer 147. From this spectrum data Analyze the sample.
- the laser light emitted from the laser light source 151 becomes interference light in the same optical path as infrared light.
- the interference light is detected by the laser light detector 152, and the moving speed and the current position of the movable mirror 141 are calculated by the speed measuring unit 132 of the control device 130 based on the detected data.
- the calculated moving speed and current position are used for controlling the drive voltage of the voice coil motor 120 in the drive control unit 131 of the control device 130 and for creating spectrum data of the analysis device 147.
- the linear motion mechanism 110 includes a linear guide 112 and a movable portion 111 that reciprocates on the linear guide 112.
- the movable mirror 141 is fixed to the movable portion 111 and is moved by the voice coil motor 120.
- FIG. 2 shows only the linear motion mechanism 110, the voice coil motor 120, and the inclination imparting unit 160. Since the other configuration is the same as that of the prior art, description of these operations will be omitted as appropriate.
- the linear guide 112 is installed on the inclination imparting portion 160 and is inclined by 30 ° with respect to the horizontal direction. Accordingly, the movable portion 111 reciprocates upward and downward with respect to gravity on a surface inclined by 30 ° from the horizontal direction along the linear guide 112.
- the inclination is set to 30 °.
- the inclination ⁇ can be appropriately changed in a range from ⁇ 90 ° to 90 ° (excluding 0 °) according to the mass of the movable part 111 and the movable mirror 141. is there.
- the force (gravity) Fg due to its own weight is applied to the movable mirror 141 and the movable portion 111 in the vertical direction, since the linear guide 112 is inclined and installed, the inclination ⁇ of the linear guide 112 is set in the moving direction of the movable mirror 141. Accordingly, the Fg component force Fg1 is always added to the voice coil motor 120.
- the drive control unit 131 applies a voltage to the voice coil motor 120 and moves the movable mirror 141.
- a voltage For example, when moving the movable mirror 141 upward with respect to the horizontal direction, as shown in FIG. 2 (b), an external force Fg1 and a movement resistance Ff are generated.
- the drive voltage By adjusting the drive voltage to be equal to the sum of forces, the movable mirror 141 moves at a constant speed.
- the movement resistance Ff is in the reverse direction as shown in FIG. 2C, so that the force Fm applied from the voice coil motor 120 is Fg1 and Ff.
- the movable mirror 141 moves at a constant speed.
- the driving force Fm of the voice coil motor is smaller than when the moving mirror moves upward. Therefore, in order to always increase the driving force Fm from the voice coil motor to a driving force Fm ′ necessary for moving at a constant speed in the conventional technique (when moving in the horizontal direction), the external force Fg1> 2 ⁇ Ff. It is preferable to provide such an inclination.
- the speed measurement unit 132 calculates the current speed of the movable mirror 141 from the output signal of the laser interference system 150, and increases the drive voltage supplied to the voice coil motor 120 according to the difference from the target speed.
- the amount of increase in the drive voltage at this time is the same as when the same foreign object enters when the linear guide 112 is installed in the horizontal direction as in the prior art.
- the driving voltage of the voice coil motor 120 in a state where no foreign matter has entered (steady state) in this embodiment is larger than that in the conventional case. Therefore, the rate of voltage increase at the time of entry of a foreign object with respect to the steady-state drive voltage, that is, the fluctuation rate of the drive voltage is smaller than the conventional one.
- the feedback control is more stable than before, and the movable mirror 141 can be moved at a constant speed.
- the linear guide 112 By inclining the linear guide 112 in this way, an external force can be applied to the movable mirror 141 in advance, and the driving voltage of the voice coil motor 120 can be increased as compared with the conventional case. Therefore, even when a foreign object enters, feedback control is performed. Can be stabilized. Further, the external force Fg1 at this time can be adjusted by changing the inclination of the linear guide 112 or the mass of the movable portion 111 or the movable mirror 141.
- the linear guide 212 is installed horizontally, and a coil spring 261 is inserted between the movable portion 211 and the elastic member fixing portion 270. Since the other configuration is the same as that of the first embodiment described above, the last two digits of the reference numerals are given the same numbers as those of the above-described embodiment, and description thereof will be omitted as appropriate.
- the coil spring 261 applies an external force Fs proportional to the spring constant and the extension of the spring to the movable portion 211. Therefore, as shown in FIG. 3A, the closer the movable portion 211 is to the beam splitter 242, the stronger the external force Fs due to the coil spring 261, and as the distance from the beam splitter 242 increases, the external force Fs becomes smaller as shown in FIG. become weak.
- the external force by the coil spring 261 over the entire movable range of the movable mirror.
- the coil spring 261 is preferably installed so that Fs> 2 ⁇ Ff.
- the drive control unit 231 applies a voltage to the voice coil motor 220 and moves the movable mirror 241.
- a voltage for example, when the movable mirror 241 is moved in a direction approaching the beam splitter 242, an external force Fs and a movement resistance Ff are generated as shown in FIG.
- the movable mirror 241 moves at a constant speed.
- a movement resistance Ff is generated in the direction shown in FIG. 3B, so that the force Fm applied from the voice coil motor 220 is the difference between Fs and Ff.
- the drive voltage to be equal the movable mirror 241 moves at a constant speed.
- the force applied from the voice coil motor 220 to the movable portion 211 needs to be continuously increased or decreased according to the fluctuation of the external force Fs. Since a rapid change does not occur, feedback control is easy. Further, at both ends of the movable range of the movable mirror 241, it is necessary to decelerate and accelerate to change the moving direction. However, since the voltage change amount is almost the same as in the conventional technique, Control is possible with feedback control.
- the driving voltage of the voice coil motor 220 is higher than the conventional case due to the external force Fs of the coil spring 261. As in the first embodiment, stable feedback control is possible.
- the external force applied to the movable portion 211 is determined by the spring constant of the coil spring 261, the external force is adjusted by replacing the coil spring 261, and the movable mirror 241 is moved at a constant speed.
- the required drive voltage of the voice coil motor 220 can be adjusted.
- the coil spring is provided so that an external force is applied to the voice coil motor side.
- a coil spring may be provided so that an external force is applied to the beam splitter side.
- the polarity of the driving voltage of the voice coil motor 220 is opposite to that of the present embodiment, but the magnitude thereof is not changed, and stable feedback control can be achieved by performing the control method in the same manner.
- the coil spring is always extended, but the coil spring may be always compressed.
- the direction of Fs is opposite to that shown in FIG. 3, the direction of the driving force by the voice coil motor is also opposite, and the magnitude thereof increases as the coil spring is compressed.
- the driving force can be increased by applying the external force, so that the feedback control can be stabilized.
- a configuration using both the extended state and the compressed state of the coil spring may be employed.
- the coil spring when the movable force moves to the beam splitter side in the center of the movable range of the movable mirror so that the external force Fs by the coil spring becomes zero, the coil spring extends and the external force Fs Works on the coil motor side.
- the movable part moves to the voice coil motor side, the coil spring is compressed and the external force Fs acts on the beam splitter side.
- the external force Fs is small when the movable part is located near the center, but the external force Fs increases as it is closer to the end of the moving range, so that stable feedback control is possible as the movable part is closer to the end. It becomes.
- coil spring in this embodiment, two or more coil springs may be used in series or in parallel.
- the operation of this embodiment will be described with reference to FIG.
- the first and second coil springs 361 and 362 have the same length and spring constant.
- the first and second coil springs 361 and 362 are always extended in the entire range in which the movable mirror moves.
- the first and second coil springs 361 and 362 are adjusted so that the external forces Fs1 and Fs2 applied to the movable portion 311 are equal.
- the external force Fs2 from the second coil spring 362 increases as the moving mirror 341 approaches the beam splitter 342, and conversely, the external force Fs1 from the first coil spring 361 decreases. Needs to be gradually raised. Since changes in the external force Fs2 and the external force Fs1 gradually change according to the moving distance, stable control is possible by feedback control.
- an external force can be applied to the movable mirror 341 in advance to increase the driving voltage of the voice coil motor. Therefore, it is possible to stabilize the feedback control even if foreign matter enters the sliding portion.
- the first and second coil springs are always stretched, but may be always compressed.
- the directions of the external forces Fs1 and Fs2 are opposite to those shown in FIG. 4, and the magnitude increases as the coil spring is compressed.
- the feedback force can be stabilized because the driving force can be increased by applying the external force.
- the length and the spring constant of the first and second coil springs are the same, but different ones may be used.
- the required drive voltage differs depending on the direction in which the movable mirror moves.
- the voltage continuously changes is the same as in the above-described embodiment, it is stable. Control is possible.
- one coil spring is inserted on each side of the movable member, but two or more coil springs may be used.
- a leaf spring 460 is inserted between the movable portion 411 and the elastic member fixing portion 470 as shown in FIG. Since the other configuration is the same as that of the third embodiment described above, the last two digits of the reference numerals are given the same numbers as those of the above-described embodiment, and description thereof will be omitted as appropriate.
- the external force Fs from the leaf spring 460 gradually increases according to the moving distance from the center of the movable range of the movable mirror 441.
- an external force Fs generated by the leaf spring 460 is generated in a direction opposite to the traveling direction, as shown in FIG.
- the driving voltage of the voice coil motor 420 becomes larger than the configuration of the prior art. Therefore, it is possible to stabilize the feedback control even if foreign matter enters the sliding portion.
- the drive voltage of the motor 420 can be adjusted.
- a voice coil motor is used as a drive source for moving the movable mirror, but it can also be moved by other motors or hydraulic devices.
- plate spring were used in the present Examples 2-4, the same effect is acquired even if it uses other elastic bodies, such as rubber
- an infrared light source is used as the light source, a light source having a wavelength such as visible light or ultraviolet light may be used.
- DESCRIPTION OF SYMBOLS 100 ... Fourier-transform type infrared spectrophotometer 110, 510 ... Linear motion mechanism 111, 211, 311, 411 ... Movable part 112, 212, 312, 412 ... Linear guide 120, 220, 320, 420, 520 ... Voice coil motor 130, 230, 530 ... Control devices 131, 231 ... Drive control unit 132 ... Speed measurement unit 140 ... Main interferometers 141, 241, 341, 441, 541 ... Moving mirrors 142, 242, 342, 542 ... Beam splitters 143, 543 ... Infrared light source 144, 544 ... Fixed mirror 145 ... Sample chamber 146,546 ...
- Infrared light detector 147 ... Analyzer 150 ... Laser interferometer 151,551 ... Laser light source 152,552 ... Laser light detector 160 ... Tilt imparting 261, 361, 362 ... coil spring 460 ... leaf springs 270, 370, 47 0 ... Elastic member fixing part
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Abstract
Description
これらの間、フィードバック制御がこのような速度変化に対応しきれない場合には、一時的に移動鏡が停止したり、制御が発散するなどの問題があった。
a) 移動鏡が固定された可動部と、
b) 前記可動部に、該可動部の移動抵抗よりも大きい外力を加える外力付与手段と、
c) 前記可動部に、該可動部の移動方向に沿った正又は負の駆動力を加える駆動源と、
d) 前記可動部の移動速度を測定する速度測定部と、
e) 前記移動速度に基づき、前記可動部が所定の態様で移動するように、前記駆動源の駆動力を制御する駆動力制御部と
を有することを特徴とする。
駆動力制御部は、速度測定部の測定結果に基づき、その移動抵抗と外力の合力に対して制御した駆動力を加え、可動部の移動が所定の態様となるようにする。例えば、外力の方向と反対の方向の駆動力を付与することにより合力をゼロとし、可動部の静止状態を維持し、又は定速で移動させる。或いは、そのような合力ゼロの状態から、駆動力を強め又は弱めることにより、可動部を静止状態から移動状態に遷移させる。可動部が定速移動状態にあるときも同様に、駆動力を強め又は弱めることにより可動部を加速し又は減速して、例えば往復運動をさせるようにする。この場合に可動部に加えられる駆動力は、可動部の移動の方向と同じである場合もあり、反対である場合もある。前者の場合が正の駆動力であり、後者の場合が負の駆動力である。
このような構成にすることで、可動部を定速で移動させるために必要な駆動力は、移動鏡の移動範囲の一部または全部で、従来技術の駆動力と比較して外力の影響により大きくなる。従って、何らかの原因で可動部が移動する速度に急な変動が生じても、該調整による駆動力の変化量を相対的に小さくすることができる。
a) 移動鏡が固定された、ガイド上を移動可能な可動部と、
b) 前記ガイドを、前記可動部の重力の該ガイドに沿う方向の分力が該可動部の該ガイド上での移動抵抗よりも大きくなるように傾斜させる傾斜手段と、
c) 前記可動部の該ガイド上での移動方向に沿った正又は負の駆動力を加える駆動源と、
d) 前記可動部の移動速度を測定する速度測定部と、
e) 前記移動速度に基づき、前記可動部が前記ガイド上を所定の態様で移動するように、前記駆動源の駆動力を制御する駆動力制御部と
を有する構成とすることができる。
110、510…直動機構
111、211、311、411…可動部
112、212、312、412…リニアガイド
120、220、320、420、520…ボイスコイルモータ
130、230、530…制御装置
131、231…駆動制御部
132…速度測定部
140…主干渉計
141、241、341、441、541…移動鏡
142、242、342、542…ビームスプリッタ
143、543…赤外光源
144、544…固定鏡
145…試料室
146、546…赤外光検出器
147…分析装置
150…レーザ干渉計
151、551…レーザ光源
152、552…レーザ光検出器
160…傾斜付与部
261、361、362…コイルスプリング
460…板バネ
270、370、470…弾性部材固定部
Claims (4)
- a) 移動鏡が固定された可動部と、
b) 前記可動部に、該可動部の移動抵抗よりも大きい外力を加える外力付与手段と、
c) 前記可動部に、該可動部の移動方向に沿った正又は負の駆動力を加える駆動源と、
d) 前記可動部の移動速度を測定する速度測定部と、
e) 前記移動速度に基づき、前記可動部が所定の態様で移動するように、前記駆動源の駆動力を制御する駆動力制御部と
を有することを特徴とするフーリエ変換型分光光度計。 - 前記外力付与手段として重力を用いることを特徴とする請求項1に記載のフーリエ変換型分光光度計。
- 前記外力付与手段が、前記可動部を付勢する弾性部材であることを特徴とする請求項1に記載のフーリエ変換型分光光度計。
- a) 移動鏡が固定された、ガイド上を移動可能な可動部と、
b) 前記ガイドを、前記可動部の重力の該ガイドに沿う方向の分力が該可動部の該ガイド上での移動抵抗よりも大きくなるように傾斜させる傾斜手段と、
c) 前記可動部の該ガイド上での移動方向に沿った正又は負の駆動力を加える駆動源と、
d) 前記可動部の移動速度を測定する速度測定部と、
e) 前記移動速度に基づき、前記可動部が前記ガイド上を所定の態様で移動するように、前記駆動源の駆動力を制御する駆動力制御部と
を有することを特徴とする請求項2に記載のフーリエ変換型分光光度計。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201580077761.XA CN107407630B (zh) | 2015-03-13 | 2015-03-13 | 傅里叶变换型分光光度计 |
| US15/558,165 US10502626B2 (en) | 2015-03-13 | 2015-03-13 | Fourier transform type spectrophotometer to control a speed of a moving mirror |
| JP2017505886A JP6237953B2 (ja) | 2015-03-13 | 2015-03-13 | フーリエ変換型分光光度計 |
| EP15885369.7A EP3270142B1 (en) | 2015-03-13 | 2015-03-13 | Fourier transform spectrophotometer |
| PCT/JP2015/057584 WO2016147271A1 (ja) | 2015-03-13 | 2015-03-13 | フーリエ変換型分光光度計 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2015/057584 WO2016147271A1 (ja) | 2015-03-13 | 2015-03-13 | フーリエ変換型分光光度計 |
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| Country | Link |
|---|---|
| US (1) | US10502626B2 (ja) |
| EP (1) | EP3270142B1 (ja) |
| JP (1) | JP6237953B2 (ja) |
| CN (1) | CN107407630B (ja) |
| WO (1) | WO2016147271A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3489643A1 (en) | 2017-11-24 | 2019-05-29 | Shimadzu Corporation | Fourier transform spectrophotometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017011752A1 (en) * | 2015-07-15 | 2017-01-19 | Massachusetts Institute Of Technology | Systems, apparatus, and methods for spectral imaging |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107407630A (zh) | 2017-11-28 |
| JPWO2016147271A1 (ja) | 2017-06-29 |
| CN107407630B (zh) | 2020-02-14 |
| EP3270142B1 (en) | 2019-06-26 |
| EP3270142A4 (en) | 2018-03-28 |
| JP6237953B2 (ja) | 2017-11-29 |
| US10502626B2 (en) | 2019-12-10 |
| EP3270142A1 (en) | 2018-01-17 |
| US20180073927A1 (en) | 2018-03-15 |
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