CN113390811A - Fourier transform infrared spectrophotometer - Google Patents
Fourier transform infrared spectrophotometer Download PDFInfo
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- CN113390811A CN113390811A CN202110163245.6A CN202110163245A CN113390811A CN 113390811 A CN113390811 A CN 113390811A CN 202110163245 A CN202110163245 A CN 202110163245A CN 113390811 A CN113390811 A CN 113390811A
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- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 title claims abstract description 51
- 239000002274 desiccant Substances 0.000 claims abstract description 113
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000007791 dehumidification Methods 0.000 abstract description 10
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 8
- 230000001154 acute effect Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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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
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Spectrometry And Color Measurement (AREA)
Abstract
The invention provides a Fourier transform infrared spectrophotometer (FTIR), which can easily replace a drying agent and can inhibit the running cost for dehumidification. The FTIR (1) is provided with: an interferometer provided with an optical element (beam splitter 103) having deliquescence; a closed chamber (10) which houses the interferometer and has an opening (11); and a desiccant unit (40). The desiccant unit has: a lid (41) that can seal the opening (11); and a box part (42) which is detachably mounted on the cover part (41), is in a shape capable of being inserted into the closed chamber (10) from the opening, and contains the drying agent (92). According to the FTIR (1), a user can easily replace the desiccant without putting hands into the sealed chamber, and can use the commercially available desiccant and reuse the cover, thereby suppressing the operation cost for dehumidification.
Description
Technical Field
The present invention relates to a Fourier Transform InfraRed Spectrophotometer (hereinafter referred to as "FTIR").
Background
In FTIR, infrared interference light with varying amplitude is generated by an interferometer represented by a michelson type interferometer, and is irradiated onto a sample, transmitted light transmitted through the sample or reflected light reflected by the sample is detected as an interferogram, and the interferogram is subjected to fourier transform processing to obtain a spectrum (power spectrum) in which the horizontal axis shows the wave number (or wavelength) and the vertical axis shows the intensity. Here, the michelson interferometer includes a beam splitter, a fixed mirror, a moving mirror, and the like, and is an apparatus that splits light into two beams by the beam splitter, and causes two reflected lights to interfere with each other after one beam is reflected by the fixed mirror and the other beam is reflected by the moving mirror.
A material made of potassium bromide (KBr) is generally used for the beam splitter. Since KBr is a deliquescent material, in FTIR, a michelson type interferometer is housed in a sealed chamber, and a mechanism for dehumidifying the sealed chamber is provided. The sample holder is provided in a sample chamber provided separately from the closed chamber, and can mount a sample through an opening provided in the sample chamber without introducing air into the closed chamber. The interference light generated in the closed chamber is irradiated to the sample through windows provided in the closed chamber and the sample chamber. These closed chambers and sample chambers are generally housed in a common housing.
Patent document 1 describes FTIR having the following structure: a1 st opening and a lid for closing the 1 st opening are provided on the upper surface of a closed chamber for housing a Michelson interferometer, and a box body having an interior communicating with the outside through the 1 st opening is provided in the closed chamber. The case is provided with a 2 nd opening separated from the 1 st opening, and the interior of the case is communicated with the space outside the case in the closed chamber through the 2 nd opening. The beam splitter is disposed in the space, and the drying agent is housed in the interior of the case. The desiccant can be a commercially available desiccant. In the FTIR, after a lid of a closed chamber is opened and a desiccant is stored into a case from a 1 st opening, the 1 st opening is closed by the lid. Thus, the space in which the beam splitter is arranged is dehumidified by the desiccant.
On the other hand, non-patent document 1 describes FTIR including a sealed chamber in which an interferometer is housed. The inside of the closed chamber is dehumidified by a dedicated desiccant box inserted into the inside of the closed chamber from an opening provided in the closed chamber. A lid body that closes the opening is fixed to the desiccant box, and the desiccant box is inserted into the closed chamber, and the opening is closed by the lid body, whereby the closed chamber is kept airtight, and dehumidification is performed by the desiccant in the desiccant box.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-253454
Non-patent document
Non-patent document 1: "Agilent Cary 630FTIR Spectrometer User's Guide", published by Agilent technologies, Inc
Disclosure of Invention
Problems to be solved by the invention
In the device described in patent document 1, when the drying agent is replaced, a user performs an operation of taking out the used drying agent from the casing and storing a new drying agent in the casing. Therefore, the user must put his/her hand into the case through the 1 st opening, which causes a problem of difficulty in work.
On the other hand, in the device described in non-patent document 1, when the desiccant is replaced, the user does not need to put his or her hand in the sealed chamber, and the operation can be easily performed. However, in the device described in non-patent document 1, since it is necessary to replace a dedicated desiccant cartridge for the device, not only a commercially available desiccant cannot be used, but also a cover fixed to the desiccant cartridge is disposable, which raises a problem of an increase in running cost for dehumidification.
The problem to be solved by the present invention is to provide an FTIR in which a desiccant can be easily replaced and the running cost for dehumidification can be suppressed.
Means for solving the problems
The FTIR of the present invention, which has been made to solve the above problems, includes:
an interferometer having a deliquescent optical element;
a closed chamber that houses the interferometer and has an opening; and
and a desiccant unit having a lid portion capable of sealing the opening, and a box portion detachably attached to the lid portion and configured to be inserted into the sealed chamber from the opening, the desiccant unit containing a desiccant.
ADVANTAGEOUS EFFECTS OF INVENTION
In the FTIR of the present invention, the desiccant is accommodated in the cartridge unit in a state where the cartridge unit of the desiccant unit is detached from the cap unit. The desiccant can be a commercially available desiccant. Then, the cartridge unit is attached to the lid, the cartridge unit is inserted into the sealing chamber through the opening of the sealing chamber, and the opening is sealed by the lid. Thereby, the desiccant is disposed in the closed chamber. When the desiccant is replaced, the lid portion is removed from the sealed chamber, and the desiccant unit is taken out from the sealed chamber. Then, the cartridge is detached from the cover, the used desiccant is taken out of the cartridge, and a new desiccant is stored in the cartridge. Thereafter, by performing the same operation as described above, a new desiccant is disposed in the closed chamber.
According to the FTIR of the present invention, a user can easily replace a desiccant without putting his or her hands in a sealed chamber, and can use a commercially available desiccant and reuse a cover, thereby suppressing the running cost for dehumidification.
Drawings
Fig. 1 is a schematic configuration diagram showing an FTIR according to an embodiment of the present invention.
Fig. 2A is a perspective view of a desiccant unit as a component of FTIR in the present embodiment.
Fig. 2B is a schematic side view of the FTIR desiccant unit according to the present embodiment. In this case, a part of the member that cannot be seen from the side shows a cross section.
Fig. 2C is an exploded view of the FTIR desiccant unit according to the present embodiment.
Fig. 3 is a development view of a cartridge portion as a constituent element of the desiccant unit.
Fig. 4 is a partially enlarged view of a sealed chamber and a housing of FTIR according to the present embodiment, and is a view showing a state where a desiccant unit is attached to an opening of the sealed chamber.
Fig. 5A is a rear perspective view of the cover portion of the desiccant unit to which a modification of the dehumidification device is attached.
Fig. 5B is a front perspective view of the lid portion and the box portion of the desiccant unit of the modification.
Description of the reference numerals
1. FTIR; 10. a closed chamber; 100. an infrared light source; 101. a condenser lens; 102. a collimating mirror; 103. a beam splitter; 104. fixing the mirror; 105. moving the mirror; 1051. a driver to move the mirror; 106. a laser light source; 107. 1 st laser mirror; 108. a 2 nd laser mirror; 109. a laser detector; 11. an opening of the closed chamber; 12. a closed chamber window; 20. a sample chamber; 201. a sample chamber entrance window; 202. a sample chamber exit window; 30. a housing; 301. a parabolic mirror; 302. an ellipsoidal mirror; 303. an infrared light detector; 31. a housing opening; 32. an internal thread; 33. a control unit; 40. a desiccant unit; 41. a cover portion; 411. a cover main body; 412. a housing support member; 4121. a housing support portion; 4122. a protrusion; 4123. a flat plate portion of the housing support member; an indicating hole and a humidity indicating hole; 413. a seal member; 414. the screw passes through the hole; 415. a hole provided in the cover main body; 416. a humidity indicator; 417. a glass plate; 42. a box section; 4211. 1 st side wall; 4212. a 2 nd side wall; 4213. a 3 rd side wall; 4214. a 4 th side wall; 4215. a 5 th side wall; 4216. a 6 th side wall; 4217. a 1 st ceiling wall; 4218. a 2 nd ceiling wall; 422. acute mountain fold lines; 423. a gap; 424. a protruding engaging hole; 425. a gas passing hole; 50. a dehumidifying device; 51. a connector; 52. a protection plate; 521. a leg; 91. a sample; 92. a desiccant.
Detailed Description
Embodiments of FTIR according to the present invention will be described with reference to fig. 1 to 5B.
(1) FTIR structure of the present embodiment
In the FTIR1 of the present embodiment, as shown in fig. 1, a sealed chamber (interferometer chamber) 10 and a sample chamber 20 are housed in a case 30.
The sealed chamber 10 is airtight, and a main interferometer including an infrared light source 100, a condenser lens 101, a collimator lens 102, a beam splitter 103, a fixed mirror 104, and a movable mirror 105 is provided inside the chamber. The beam splitter 103 is made of a deliquescent material, KBr. Further, a laser light source 106, a 1 st laser mirror 107, a 2 nd laser mirror 108, and a laser detector 109, and a control interferometer including a beam splitter 103, a fixed mirror 104, and a movable mirror 105, which are common to the main interferometer, are provided inside the sealed chamber 10. The main interferometer is a member for generating main interference light to be irradiated to the sample, and the control interferometer is a member for controlling the position of the moving mirror 105. A driver 1051 for moving the movable mirror 105 is connected to the movable mirror 105.
A rectangular opening 11 is provided in a wall surface of the sealed chamber 10 at a position close to a wall surface of the casing 30. A case opening 31 is provided in a wall surface of the case 30 facing the opening 11. The opening 11 can be hermetically closed by a lid 41 of a desiccant unit 40 described later. Further, a wall surface of the sealed chamber 10 is provided with a sealed chamber window 12 which is a window through which main interference light generated by the main interferometer passes.
These components are disposed outside the sealed chamber 10 in the housing 30 so that the main interference light emitted from the main interferometer and passing through the sealed chamber window 12 is introduced into the infrared light detector 303 via the parabolic mirror 301, the sample chamber 20, and the elliptical mirror 302.
An accessory (not shown) corresponding to a measurement method is attached to the sample chamber 20. For example, in the case of performing total reflection measurement (ATR), an accessory having the following components is housed in the sample chamber 20: a sample holder; a prism that is pressed against the sample 91 held by the sample holder; and an optical system that introduces infrared light at a predetermined angle to the sample and guides the infrared light totally reflected by the sample to the infrared light detector 303. In the case of performing transmission measurement, an attachment having the following members is housed in the sample chamber 20: a sample holder; and an optical system that introduces infrared light into the sample 91 held by the sample holder at a predetermined angle and guides the infrared light transmitted through the sample to the infrared light detector 303.
The wall surface of the sample chamber 20 is provided with: a sample chamber entrance window 201 through which the main interference light reflected by the parabolic mirror 301 enters the sample chamber 20; and a sample chamber emission window 202 through which the main interference light reflected by or transmitted through the sample 91 in the sample chamber 20 is emitted from the sample chamber 20.
The desiccant unit 40 shown in fig. 2A to 2C is attached to the closed chamber 10. The structure of the desiccant unit 40 is described below.
The desiccant unit 40 includes a lid 41 that can seal the opening 11, and a cartridge 42 that is detachably attached to the lid 41.
The cover 41 includes a flat plate-like cover main body 411, a housing support member 412 provided on one surface of the cover main body 411, and a packing 413.
The housing support member 412 is a member that: two pieces of housing support portions 4121, which are formed by bending the vicinities of two opposing sides of a rectangular plate-shaped member perpendicularly to a fold line parallel to the two sides, are disposed on the cover main body 411 so as to be spaced apart from each other in parallel and perpendicularly to the cover main body 411. The flat plate portion 4123 of the housing support member 412, which is located between the two housing support portions 4121, is fixed to the one surface of the cover main body 411. The interval between the two housing support portions 4121 is shorter than the long side of the opening 11 of the sealed chamber 10. Two (four in total in the two housing support portions 4121) protrusions 4122 are provided on a surface of each housing support portion 4121 of the two housing support portions 4121, the surface facing the other housing support portion 4121.
The seal 413 is a linear member surrounding a slightly larger area than the outer edge of the opening 11 of the sealed chamber 10. The housing support member 412 is disposed inside the region surrounded by the seal 413.
One (four in total) screw insertion holes 414 are provided outside the region surrounded by the seal 413 and near the four corners of the cover main body 411. One outer screw, i.e., the manual screw 43, extends through each screw through hole 414.
A hole 415 is provided in the center of the cover main body 411, and a transparent glass plate 417 is provided in the cover main body 411 so as to hermetically adhere to the cover main body 411 so as to close the hole 415. The sheet-like humidity indicator 416 is fixed by being sandwiched between the flat plate portion 4123 of the housing support member 412 and the glass plate 417. Humidity indicator holes 4124 are provided in the flat plate portion 4123 of the housing support member 412 at positions facing the holes 415 of the cover main body 411 with the humidity indicator 416 interposed therebetween (the humidity indicator 416 is not shown in fig. 2b, 2C, and the position where the humidity indicator 416 is fixed is shown by broken lines). The humidity indicator 416 is a member whose color changes according to the ambient humidity. With such a configuration, the color of the humidity indicator 416 changes according to the humidity inside the closed chamber 10, and the color of the humidity indicator 416, that is, the humidity inside the closed chamber 10 can be confirmed from the outside of the FTIR1 through the glass plate 417.
The box portion 42 is formed by bending a flexible plate material. In the present embodiment, a thin metal (stainless steel in this example, or another metal material) plate is used to such an extent that the user can bend the plate by hand. Fig. 3 shows the shape of the plate material before bending. In fig. 3, a 1 st side wall 4211, a 1 st ceiling wall 4217, a 2 nd ceiling wall 4218, and a 2 nd side wall 4212 are connected in this order from the left. In this developed view, the plate constituting the 3 rd side wall 4213 is provided below the 1 st side wall 4211 and below the 2 nd side wall 4212, the plate constituting the 4 th side wall 4214 is provided above the 1 st side wall 4211 and above the 2 nd side wall 4212, the plate constituting the 5 th side wall 4215 is provided below the 1 st ceiling wall 4217 and the 2 nd ceiling wall 4218, and the plate constituting the 6 th side wall 4216 is provided above the 1 st ceiling wall 4217 and the 2 nd ceiling wall 4218, respectively. The metal plate is folded between the 1 st top wall 4217 and the 2 nd top wall 4218 (acute angle folding line 422) into an acute angle, between the 1 st side wall 4211 and the 1 st top wall 4217 and between the 2 nd top wall 4218 and the 2 nd side wall 4212, respectively, into an obtuse angle so that the 1 st side wall 4211 and the 2 nd side wall 4212 are parallel to each other, and the other walls are folded into a right angle. As a result, as shown in fig. 2A to 2C, the cartridge 42 having a space for containing the desiccant 92 surrounded by the side walls and the ceiling wall is formed.
The 3 rd side wall 4213 and the 4 th side wall 4214 constitute the side wall of the box portion 42 in a state of being divided into a portion connected to the 1 st side wall 4211 and a portion connected to the 2 nd side wall 4212, respectively, but the gap 423 between these two portions is of a size that the desiccant 92 cannot pass through, and the desiccant 92 does not pass through the gap 423 and accidentally leaks out of the box portion 42. Similarly, the 5 th side wall 4215 and the 6 th side wall 4216 each have a gap 423 of a size that does not allow the desiccant 92 to pass therethrough, and are divided into a portion connected to the 1 st top wall 4217 and a portion connected to the 2 nd top wall 4218.
One projection engagement hole 424 is provided in each of the 1 st side wall 4211 and the 2 nd side wall 4212 at a position corresponding to the four projections 4122 provided in the housing support portion 4121 of the lid 41. Further, the 1 st to 4 th side walls 4211 to 4214, the 1 st top wall 4217 and the 2 nd top wall 4218 are provided with a plurality of gas passage holes 425 having a size that allows gas to pass therethrough but prevents the desiccant 92 from passing therethrough.
Around the opening 11 of the sealed chamber 10, female screws 32 (see fig. 4) that engage with the manual screw 43 are provided at positions corresponding to the four screw insertion holes 414 provided in the lid main body 411, respectively.
The FTIR1 has a control unit 33. The control section 33 is a member that controls each section constituting the main interferometer and the control interferometer, and receives a detection signal obtained by the infrared light detector 303 and performs signal processing.
(2) Operation of FTIR of the present embodiment
First, the measuring operation of the FTIR1 according to the present embodiment is briefly described, and then the operation of replacing the drying agent is described in detail.
(2-1) measuring action of FTIR1
First, the user mounts an accessory corresponding to the measurement purpose to the sample chamber 20, and holds the sample 91 in a sample holder provided in the accessory. Then, infrared light is emitted from the infrared light source 100. The infrared light is guided to the beam splitter 103 via the condenser lens 101 and the collimator lens 102, and is split into two beams. One infrared light is reflected by the fixed mirror 104 and returns to the beam splitter 103, and the other infrared light is reflected by the moving mirror 105 and returns to the beam splitter 103. Thereby generating a main interference light in which the two beams interfere with each other. The main interference light is detected by an infrared detector 303 via the sealed chamber window 12, the parabolic mirror 301, the sample chamber 20, and the elliptical mirror 302. Then, by detecting the infrared light while moving the moving mirror 105, the control unit 33 acquires an interference pattern, and performs fourier transform on the interference pattern, thereby acquiring a power spectrum in which the horizontal axis is the wave number and the vertical axis is the intensity.
During this time, the control unit 33 acquires the detection signal generated by the laser detector 109. The detection signal corresponds to the intensity of the laser light interfered by the control interferometer, and the moving distance of the movable mirror 105 can be obtained from the change in the intensity. Based on the movement distance thus obtained, the control unit 33 transmits a signal to the driver 1051 to control the position of the movable mirror 105.
As described above, the beam splitter 103 is made of a material having deliquescence, but the desiccant 92 is stored in the cartridge portion 42 of the desiccant unit 40, and the cartridge portion 42 is disposed in the closed chamber 10, whereby the inside of the closed chamber 10 is maintained in a dry state.
(2-2) replacement operation of drying agent
First, as a premise for explaining the replacement operation of the drying agent 92, an operation of attaching the cartridge unit 42 to the cover 41 and an operation of detaching the cartridge unit 42 from the cover 41 will be described.
When the box portion 42 is attached to the lid portion 41, the 1 st sidewall 4211 and the 2 nd sidewall 4212 are pressed by a human hand from the outside of the box portion 42 to bring both the 1 st sidewall 4211 and the 2 nd sidewall 4212 closer to each other. Thereby, the box portion 42 is bent at the acute mountain fold line 422 to be further acute angled, and the 1 st side wall 4211 and the 2 nd side wall 4212 approach each other. In a state where the 1 st side wall 4211 and the 2 nd side wall 4212 are held pressed in this manner, the end portions of the 1 st side wall 4211 and the 2 nd side wall 4212 are inserted between the two housing support portions 4121 provided in the cover 41. Then, the four protrusions 4122 provided in the housing support portion 4121 and the four protrusion engagement holes 424 provided in the cartridge portion 42 are aligned, and the hand pressing the cartridge portion 42 is released. Thereby, the projection 4122 is engaged with the projection engagement hole 424, and the cartridge unit 42 can be attached to the lid 41.
On the other hand, when the projection 4122 is released from the projection engagement hole 424 by pressing the 1 st side wall 4211 and the 2 nd side wall 4212 with a human hand in the same manner as described above and the box portion 42 is separated from the lid portion 41, the box portion 42 can be detached from the lid portion 41.
When the drying agent 92 is stored in the closed chamber 10, the drying agent 92 is first stored in the case portion 42 in a state where the case portion 42 is detached from the cover portion 41, and then the case portion 42 is attached to the cover portion 41 by the method described above. Next, as shown in fig. 4, the cartridge unit 42 is inserted into the sealed chamber 10 from the opening 11. Then, the cap 41 is fixed to the wall of the closed chamber 10 by screwing the four manual screw screws 43 into the female screws 32 provided around the opening 11, respectively. Thereby, the lid 41 is pressed against the wall of the sealed chamber 10 with the packing 413 interposed therebetween, and the opening 11 is sealed by the lid 41. By the above operation, the desiccant 92 in the cartridge portion 42 is stored in the closed chamber 10.
When the desiccant 92 is replaced after the desiccant 92 is used in the closed chamber 10 for a predetermined period of time, first, the manual screw 43 is removed from the female screw 32, the lid 41 is moved, and the cartridge 42 is taken out from the closed chamber 10. Next, the cartridge portion 42 is detached from the lid portion 41 by the above-described method. The used desiccant 92 in the cartridge portion 42 is then taken out, and a new desiccant 92 is stored in the cartridge portion 42. Thereafter, the cartridge 42 is attached to the lid 41 by the above-described method, the cartridge 42 is inserted into the closed chamber 10 from the opening 11, and the lid 41 is fixed to the wall of the closed chamber 10, thereby completing the replacement operation of the desiccant 92.
According to the above embodiment, the user can easily replace the drying agent 92 without putting his or her hands into the closed chamber 10. Further, since the commercially available desiccant can be used as the desiccant 92 and the lid 41 can be reused, the running cost for dehumidification can be reduced.
In the above embodiment, the box portion 42 formed by bending a flexible plate material is bent by a human hand, so that the box portion 42 is attached to and detached from the lid 41, and the desiccant unit 40 is attached to and detached from the sealed chamber 10 by manually screwing the screw 43. This enables the drying agent 92 to be replaced without using tools.
(3) Modification example
Next, a modified desiccant unit will be described. In this modification, as shown in fig. 5A and 5B, the desiccant unit 40 of the above embodiment is further provided with a dehumidifying device 50. The dehumidifying apparatus 50 is an electric dehumidifying apparatus operated by electric power, and is provided to close the hole 415 of the cover main body 411. In this modification, the humidity indicator 416 is not used. The dehumidifying apparatus 50 is provided with a connector 51 for supplying power thereto. A plate-shaped shield plate 52 is provided on the surface of the cover 41 on which the casing support member 412 and the like are provided so as to cover the dehumidifier 50 via the legs 521. The structure of the box portion 42 is the same as that of the above embodiment. The protection plate 52 is provided to prevent the desiccant 92 stored in the case 42 from moving and colliding with the dehumidifier 50.
In this modification, the method of storing the desiccant 92 (the cartridge portion 42 in which the desiccant 92 is stored) in the sealed chamber 10 and the method of replacing the desiccant 92 are the same as those in the above embodiment. In a state where the cassette unit 42 is housed in the closed chamber 10, the connector 51 is connected to a power supply (not shown), whereby the dehumidifying apparatus 50 is operated. The connector 51 is not housed in the sealed chamber 10.
In this modification, the dehumidification device 50 and the desiccant 92 stored in the cassette unit 42 are used together, whereby the inside of the sealed chamber 10 can be dehumidified more reliably. Note that, when the desiccant 92 is not stored in the cartridge portion 42, the cartridge portion 42 may be stored in the closed chamber 10, and the inside of the closed chamber 10 may be dehumidified only by the dehumidifier 50.
In general, an electric dehumidifier allows external air to pass therethrough when not energized. Therefore, in the configuration of the modified example, the dehumidifying apparatus 50 basically operates at all times including the non-measurement time. When the dehumidifying device 50 is stopped, such as when no measurement is performed for a long time, the desiccant unit 40 having the dehumidifying device 50 is removed from the closed chamber 10, and instead, the desiccant unit 92 is stored in the desiccant unit 40 not having the dehumidifying device 50 of the above-described embodiment, and then the desiccant unit 40 is attached to the closed chamber 10.
The present invention is not limited to the above-described embodiment and modification examples, and can be further modified.
For example, in the above embodiment, the projection 4122 is provided in the lid portion 41 and the projection engaging hole 424 is provided in the box portion 42 in order to fix the box portion 42 to the lid portion 41, but the projection may be provided in the box portion and the projection engaging hole may be provided in the lid portion.
In the above embodiment, in order to enable the replacement operation of the desiccant 92 without using a tool, the box portion 42 formed by bending a flexible plate material is bent by a human hand, the box portion 42 is attached to and detached from the lid portion 41, and the desiccant unit 40 is attached to and detached from the sealed chamber 10 by manually screwing the screw 43, but the box portion 42 may be screwed to the lid portion 41 by using a tool, and/or the desiccant unit 40 may be screwed to the sealed chamber 10.
The shape of the box portion 42 is not limited to the above example, and may be a simple rectangular parallelepiped, for example.
In the above modification, the dehumidifying device 50 is attached to the lid 41, but the dehumidifying device may be attached to the box.
[ solution ]
Those skilled in the art will appreciate that the above-described exemplary embodiments are specific examples of the following technical solutions.
(item 1)
The FTIR of item 1 has:
an interferometer having a deliquescent optical element;
a closed chamber that houses the interferometer and has an opening; and
and a desiccant unit having a lid portion capable of sealing the opening, and a box portion detachably attached to the lid portion and configured to be inserted into the sealed chamber from the opening, the desiccant unit containing a desiccant.
In the FTIR of item 1, the desiccant is contained in the cartridge unit in a state where the cartridge unit of the desiccant unit is detached from the lid unit. The desiccant can be a commercially available desiccant. Then, the cartridge unit is attached to the lid, the cartridge unit is inserted into the sealing chamber through the opening of the sealing chamber, and the opening is sealed by the lid. Thereby, the desiccant is disposed in the closed chamber. When the desiccant is replaced, the cover is removed from the sealed chamber, and the desiccant unit is taken out from the sealed chamber. Then, the cartridge is removed from the cover, the used desiccant is taken out of the cartridge, and a new desiccant is stored in the cartridge. Thereafter, by performing the same operation as described above, a new desiccant is disposed in the closed chamber.
According to the FTIR of item 1, the user can easily replace the desiccant without putting his or her hands in the sealed chamber, and can use a commercially available desiccant and reuse the lid, thereby suppressing the running cost for dehumidification.
(item 2)
According to the FTIR of item 1, in the FTIR of item 2,
the box part is formed by bending a flexible plate material,
a plurality of projections are provided on either the box portion or the cover portion, and holes into which the projections can be engaged are provided in positions of the other of the box portion and the cover portion corresponding to the projections.
According to FTIR of item 2, after the desiccant is contained in the cartridge unit, the cartridge unit is attached to the lid by engaging each of the plurality of projections with a hole provided at a position corresponding to each projection while flexing the plate material of the cartridge unit. When the desiccant is taken out from the box portion, the plate material of the box portion is bent and each of the plurality of projections is removed from the hole, whereby the box portion is removed from the cover portion. Thus, the attachment and detachment of the box portion to and from the lid portion can be easily performed without using a tool.
(item 3)
The FTIR according to item 1 or item 2, in the FTIR of item 3,
a plurality of internal threads are formed on a wall of the closed chamber around the opening,
screw through holes are respectively formed in the cover portion at positions corresponding to the respective female screws among the plurality of female screws,
the FTIR further comprises:
a manually screwed male screw which is capable of being screw-coupled with each of the plurality of female screws one by one, and which has the same number as the plurality of female screws; and
a seal member provided around the opening at a position of the cover portion facing the wall of the sealed chamber.
According to FTIR of item 3, the seal is pressed against the wall around the opening of the closed chamber by screwing the manually screwed male screw, and the lid portion is fixed to the wall, so that the opening can be sealed with the lid portion without using a tool.
(item 4)
The FTIR according to any one of items 1 to 3, wherein the FTIR according to item 4 further comprises a humidity measuring part for measuring humidity in said sealed chamber.
According to the FTIR described in item 4, the user can determine the timing of replacing the drying agent based on the humidity in the sealed chamber obtained by the humidity measuring unit.
As such a humidity display unit, for example, a sheet-like humidity indicator, which is attached so as to close a hole provided in a cover and whose color changes depending on humidity, can be used. In this example, the humidity inside the sealed chamber can be recognized by checking the color of the humidity indicator through the hole.
(item 5)
An FTIR according to any one of items 1 to 4, in the FTIR of item 5, a dehumidifying device is further mounted to a position of the lid portion facing the opening or the cartridge portion.
According to the FTIR of item 5, the desiccant is used and the dehumidifying device is used, so that the inside of the sealed chamber can be dehumidified more reliably. Alternatively, the desiccant may be omitted and only the dehumidifying device may be used to dehumidify the air.
Claims (5)
1. A Fourier transform infrared spectrophotometer, wherein,
the Fourier transform infrared spectrophotometer includes:
an interferometer having a deliquescent optical element;
a closed chamber that houses the interferometer and has an opening; and
and a desiccant unit having a lid portion capable of sealing the opening, and a box portion detachably attached to the lid portion and configured to be inserted into the sealed chamber from the opening, the desiccant unit containing a desiccant.
2. The Fourier transform infrared spectrophotometer of claim 1,
the box part is formed by bending a flexible plate material,
a plurality of projections are provided on either the box portion or the cover portion, and holes into which the projections can be engaged are provided in positions of the other of the box portion and the cover portion corresponding to the projections.
3. The Fourier transform infrared spectrophotometer of claim 1 or 2,
a plurality of internal threads are formed on a wall of the closed chamber around the opening,
screw through holes are respectively formed in the cover portion at positions corresponding to the respective female screws among the plurality of female screws,
the Fourier transform infrared spectrophotometer further includes:
a manually screwed male screw which is capable of being screw-coupled with each of the plurality of female screws one by one, and which has the same number as the plurality of female screws; and
a seal member provided around the opening at a position of the cover portion facing the wall of the sealed chamber.
4. The Fourier transform infrared spectrophotometer of claim 1 or 2,
the Fourier transform infrared spectrophotometer further includes a humidity measuring unit that measures humidity in the sealed chamber.
5. The Fourier transform infrared spectrophotometer of claim 1 or 2,
the fourier transform infrared spectrophotometer further includes a dehumidifying device mounted on a position of the lid portion facing the opening or the case portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020032319A JP7371531B2 (en) | 2020-02-27 | 2020-02-27 | Fourier transform infrared spectrophotometer |
| JP2020-032319 | 2020-02-27 |
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| CN113390811A true CN113390811A (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110163245.6A Pending CN113390811A (en) | 2020-02-27 | 2021-02-05 | Fourier transform infrared spectrophotometer |
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| CN (1) | CN113390811A (en) |
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| JP2023120040A (en) | 2022-02-17 | 2023-08-29 | 株式会社島津製作所 | Drying holder, method of preparing measurement samples, and measurement method |
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| JP2002071460A (en) * | 2000-08-25 | 2002-03-08 | Shimadzu Corp | Fourier transform infrared spectrophotometer |
| CN101084419A (en) * | 2004-12-21 | 2007-12-05 | 福斯分析公司 | A method for standardising a spectrometer |
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| Publication number | Publication date |
|---|---|
| JP7371531B2 (en) | 2023-10-31 |
| JP2021135204A (en) | 2021-09-13 |
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