JP2003014615A - Light stability test equipment - Google Patents

Abstract

(57) [PROBLEMS] To provide a light stability test device capable of accurately testing the light stability of a sample by accurately transmitting a signal without noise into a signal from an optical sensor. SOLUTION: In a light stability test device having signal transmission means 7 for transmitting a signal from an optical sensor 5 to a control unit for controlling a light source, a signal processing circuit 50 for processing a signal from the optical sensor is provided. Means is the optical sensor side mechanism 7
1 and a control unit side mechanism 72. The two mechanisms are separated and transmit signals by electromagnetic action in a state of no physical contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photostability test device for testing photostability of chemicals and the like.

[0002]

2. Description of the Related Art A conventional photostability test apparatus is shown in FIGS.
Will be described with reference to.

FIG. 6 is a schematic front view showing a conventional light stability test apparatus. The light stability test apparatus 1 has a light source 2 and an optical system 3 which is a reflecting mirror, and a tubular light source such as a fluorescent lamp is used as the light source 2. It should be noted that this conventional light stability test apparatus 1 is an example, and there are actually devices using various light sources.

On the other hand, a sample table 4 is rotatably installed on a lower portion by a rotary shaft 6. The rotary shaft 6 can be rotated by a drive device (not shown). The sample table 4 is provided with two optical sensors 5. The optical sensor 5 measures the irradiation amount of the light beam from the light source 2 or the direct light beam from the light source 2 via the optical system 3.

A sample such as a chemical (not shown) is placed on the sample table 4, and the light beam from the light source 2 and the light beam from the light source 2 are directly irradiated to the sample through the optical system 3 to measure the deterioration degree of the sample. Will test the photostability of this sample. In order to make the irradiation uniform, the sample stage 4 is rotated about the rotation axis 6 by a driving device (not shown) during the irradiation.

The irradiation amount on the sample is measured by an optical sensor 5, and a signal from the optical sensor 5 is transmitted to a control unit (not shown) via a signal transmission mechanism 7 to control the emission amount of the light source 2 and the integrated irradiation amount. Used for aggregation. That is, the amount of light of the light source 2 is controlled by feeding back the amount of light received by the optical sensor 5.

FIG. 7 is a perspective view of essential parts showing a signal transmission mechanism 7 provided on the rotary shaft 6 in the conventional light stability test apparatus 1. The signal transmission mechanism 7 is for transmitting a signal from the optical sensor 5 to a control unit (not shown).
The signal transmission mechanism 7 is mainly provided in contact with the insulating portion 8 provided on the outer periphery of the rotary shaft 6, the slip ring 9 provided along the outer peripheral surface of the insulating portion 8, and the slip ring 9. It is composed of a slider 10 and a terminal block 11. That is, the signal from the optical sensor 5 is transmitted from the slip ring 9 to the slider 10 via the hollow rotating shaft 6 by a conductor (not shown), and is transmitted to the controller (not shown) via the terminal block 11.

[0008]

However, the photostability test apparatus 1 having the above-mentioned signal transmission mechanism 7 has the following problems.

That is, since the (signal) current transmitted from the slip ring 9 to the slider 10 is a weak current of about several tens to 100 nA, it is necessary to flow this weak current in a stable manner. There is a problem that noise is included in the signal due to the sliding action on the contact surface between the moving element 10 and the signal is not accurately transmitted, so that the light stability of the sample cannot be accurately tested.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and accurately tests the light stability of a sample by providing a signal transmitting means for accurately transmitting the signal without noise in the signal. It is an object of the present invention to provide a photostability test device that can be used.

[0011]

In order to achieve the above object, a photostability test apparatus according to the present invention is provided with a light source and a sample table on which a sample irradiated with a light beam emitted from the light source is placed. In the photostability test apparatus having an optical sensor for measuring an irradiation amount of a light beam attached to the sample table, and a signal transmitting unit for transmitting a signal from the optical sensor to a control unit that controls the light source, The signal transmission means has a signal processing circuit for processing a signal from the optical sensor, and the signal transmission means has an optical sensor side mechanism and a control section side mechanism. The two mechanisms are separated and a signal is generated by an electromagnetic action in a physical non-contact state. It is characterized by transmitting. The “state in which the two mechanisms are separated and in physical non-contact” means a state in which the mechanism on the optical sensor side and the mechanism on the control unit side are mechanically separated and a gap or space exists between the two mechanisms. "Electromagnetic action" includes electrical action, magnetic action, and optical action.

It is also possible to have an optical system for adjusting the light beam emitted from the light source and control this optical system.

The drive power of the signal processing circuit on the sample table side is preferably supplied from a solar cell provided on the sample table.

Further, it is preferable that the driving power of the signal transmitting means is supplied from a solar cell provided on the sample stage.

Further, it is preferable that the optical sensor side mechanism and the control section side mechanism in the signal transmitting means are composed of a combination of a magnetic coil and a magnetic core.

Further, it is preferable that the optical sensor side mechanism and the control section side mechanism in the signal transmitting means are composed of a combination of two magnetic coils.

The magnetic coil is preferably a ferrite coil. In addition, the signal processing circuit transmits an amplifier that amplifies a signal from the optical sensor, an analog-digital converter that converts the signal amplified by the amplifier into a digital signal, a digital data register that records the digital data, and the digital data register. It is preferable to have a data transmitter that

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on examples with reference to the drawings.

A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a front view of a main part of a photostability test apparatus according to a first embodiment of the present invention. Light stability tester 1
Has a sample table 4 on which a sample is placed, and is rotatable by a rotary shaft 6. A rotary plate 61 is attached to the rotary shaft 6.
Is attached to the rotary plate 61, the rotary belt 62 is hung on the rotary plate 61, and the rotary plate 6 rotates the rotary belt 62.
3, a rotary shaft 64 for rotating the rotary plate 63, and a drive source 65 for driving the rotary shaft 64 are provided. That is, the driving force from the driving source 65 is applied to the rotary shaft 64 and the rotary plate 6.
3, the sample table 4 is rotated via the rotary belt 62, the rotary plate 61 and the rotary shaft 6.

Two optical sensors 5 for measuring the irradiation amount of a light beam from a light source (not shown) are attached to the sample table 4. The signal from the optical sensor 5 is first transmitted to the signal processing circuit 501 on the optical sensor side. The signal processing circuit 501 on the optical sensor side mainly includes the amplifier 52 and the conductor 5.
It consists of 1.

The signal that has passed through the signal processing circuit 501 is transmitted to the control section (not shown) via the signal transmission means 7. The signal transmitting means 7 is mainly a magnetic coil 7 which is a mechanism on the optical sensor side.
1 and a magnetic core 72 and a magnetic coil 73 which are the control side mechanism. Magnetic coil 7 which is the mechanism on the optical sensor side
1 and the magnetic core 72, which is the mechanism on the control unit side, are mechanically separated, and there is no place where they slide with each other. That is, a slight gap is provided between the magnetic coil 71 and the magnetic core 72, and there is no physical contact. This signal transmission means 7
The signal is transmitted to a control unit (not shown) via the amplifier 74 which is the signal processing circuit 502 on the control unit side.

Next, the operation and effect of the light stability test apparatus 1 having the above-mentioned structure will be described.

First, a sample such as a chemical (not shown) is placed on the sample table 4. Next, this sample is irradiated with a light beam from a light source (not shown). During the irradiation, in order to ensure uniform irradiation, the driving force from the driving source 65 is applied to the rotating shaft 64,
Rotating plate 63, rotating belt 62, rotating plate 61 and rotating shaft 6
After that, the sample table 4 is rotated. During this irradiation, the light sensor 5 measures the irradiation amount of the light beam from the light source (not shown). The signal relating to the irradiation amount is transmitted from the optical sensor 5 to the control unit (not shown) via the signal processing circuit 501 on the optical sensor side, the signal transmission circuit 7 and the signal processing circuit 502 on the control unit side to control the light emission amount of the light source. It is also used to calculate the total dose. That is, the light amount of the light source (not shown) is controlled by feeding back the light receiving amount of the optical sensor 5.

Here, as described above, the signal transmission means 7
Is composed of a magnetic coil 71 which is an optical sensor side mechanism, a magnetic core 72 and a magnetic coil 73 which are a control unit side mechanism, and a magnetic coil 71 which is an optical sensor side mechanism and a magnetic core 72 which is a control unit side mechanism. And are mechanically separated, and there is no place where they slide against each other. That is, a slight gap is provided between the magnetic coil 71 and the magnetic core 72. That is, a signal is transmitted between the magnetic coil 71 and the magnetic core 72 by an electromagnetic action in a state where the magnetic coil 71 and the magnetic core 72 are not in physical contact with each other. Therefore, the signal amplified by the amplifier 52 is not affected by the noise due to the sliding action, and accurate signal transmission becomes possible.

As a result, the amount of light received by the optical sensor 5 can be accurately fed back to adjust the amount of light from the light source, and the light stability of the sample can be accurately tested.

Next, a photostability test apparatus according to the second embodiment of the present invention will be described with reference to FIGS. 2 and 3.

FIG. 2 is a circuit diagram of the signal transmission means and the signal processing circuit in the photostability test apparatus according to the second embodiment of the present invention, and FIG. 3 is a diagram of the registers in the signal processing circuit.

Ferrite cores are used for the magnetic coils 71 and 73 of the signal transmitting means 7 in the optical stability test apparatus according to the second embodiment. The magnetic coil 71 corresponds to the optical sensor side mechanism, and the magnetic coil 73 corresponds to the control unit side mechanism. As the signal processing circuit 50, the signal processing circuit 501 on the optical sensor side and the signal processing circuit 502 on the control unit side are largely included.
And are provided.

In the signal processing circuit 501 on the optical sensor side, a signal passes through the optical sensor 5, an amplifier (amplifier), an analog-digital converter, a digital data register, a data transmitter and a high-frequency superimposing transmission / reception circuit, and the magnetic field of the optical sensor side mechanism It is transmitted to the coil 71. Note that C ₁ and C ₂ are low frequency cut capacitors.

In the signal processing circuit 502 on the control unit side, a signal is transmitted to the control unit via the magnetic coil 73, the high frequency superimposing transmission / reception circuit, the data receiver and the register which are the mechanism on the control unit side. Note that C ₃ and C ₄ are low frequency cut capacitors.

Between the magnetic coils 71 and 73, low frequency power source energy for the signal processing circuit 501 is transmitted and high frequency digital signals are communicated between the signal processing circuit 501 and the signal processing circuit 502. L ₁ , L ₂ and L ₃ ,
L ₄ is a high-frequency cut inductance.

Next, the operation and effect of the signal transmitting means 7 and the signal processing circuit 50 in the light stability test apparatus having the above-mentioned structure will be described.

During the test in the light stability tester, a light beam from a light source (not shown) illuminates a sample placed on a sample table (not shown). During this irradiation, the irradiation amount of the light beam is measured by the optical sensor 5 provided on the sample stage (not shown).
The measured signal is first amplified by an amplifier and then converted into a digital signal by an analog-digital converter. This digital signal is recorded in the digital data register and is transmitted to the high frequency superimposing transmission / reception circuit by the data transmitter based on the transmission command. After that, the signals that have passed through the low-frequency cutting capacitors C ₁ and C ₂ are transmitted to the magnetic coil 71 of the optical sensor side mechanism. The signal magnetically converted by the magnetic coil 71 is a ferrite core 72.
Is transmitted to the magnetic coil 73 via. Magnetic coil 73
Magnetic signal transmitted to is converted into an electric signal in the magnetic coil 73 is transmitted to the signal processing circuit 502 through the capacitance C _3, C _4.

That is, a high-frequency signal is accurately transmitted by an electromagnetic effect without sliding through the gap between the magnetic coils 71 and 73.

High frequency signal transmitted to the magnetic coil 73
Is the capacitance C for low frequency cut _Three, C_FourVia Takashi
Data is transmitted to the wave superimposing transmission / reception circuit, and data is transmitted by the transmission command.
It is transmitted to the receiver and transmitted to the control unit via the register.
It After that, the light quantity of the light source (not shown) is controlled by this control unit.
It will be regulated and controlled. Electromagnetic without sliding action
Controllable by signals accurately transmitted by pneumatic action
Therefore, the light intensity of the light source can be adjusted more accurately.
It

Although one optical sensor has been described in this embodiment, when a plurality of sensors are used, a plurality of data registers (three in FIG. 3) are used as shown in FIG. It is possible to transmit all data with a single transmission command with a data capacity of.

Further, in the present embodiment, the data on the signal is converted into a digital signal by the analog-digital converter, but it can be implemented by an analog signal. That is,
If the signals to be transmitted and received are fixed to high frequencies of different frequencies, each signal can be separated by preparing a receiving circuit capable of receiving each frequency. At this time, the data can be read by the receiving side according to the amplitude or phase of the signal. If the frequencies used are sufficiently separated, the size of the data can be converted into the frequency and the data can be read at the frequency of each signal. That is, the communication signal of the signal transmitting means and the signal processing circuit in the light stability test apparatus according to the second embodiment of the present invention may be a digital signal or an analog signal.

A third embodiment of the present invention will be described with reference to FIGS. 4 and 5.

FIGS. 4A and 4B show a photostability test apparatus according to a third embodiment of the present invention. FIG. 4A is a plan view of a main part and FIG. 4B is a front view of the main part. FIG. 5 is a cross-sectional view of essential parts showing a signal transmission means in the photostability test apparatus according to the third embodiment of the present invention.

As shown in FIG. 4, in the photostability test apparatus according to the third embodiment of the present invention, three small sample stands 42 are further provided on the sample stand 4. These three small sample stands 4
Each of 2 is rotatable by a drive source 44 via a rotary shaft 43. The sample table 4 is rotatable by a rotary shaft 6. Specifically, the rotary shaft 6 includes a rotary plate 61.
Is attached to the rotary plate 61, the rotary belt 62 is hung on the rotary plate 61, and the rotary plate 6 rotates the rotary belt 62.
3, a rotary shaft 64 for rotating the rotary plate 63, and a drive source 65 for driving the rotary shaft 64 are provided. That is, the driving force from the driving source 65 is applied to the rotary shaft 64 and the rotary plate 6.
3, the sample table 4 is rotated via the rotary belt 62, the rotary plate 61 and the rotary shaft 6.

Two optical sensors 5 for measuring the irradiation amount of a light beam from a light source (not shown) are attached to the sample table 4. The signal from the optical sensor 5 is transmitted to an amplifier 52, which is a signal processing circuit, by a conductor (not shown). The amplifier 52 is driven by the electric power from the solar cell 45. That is, during the test in the light stability test device,
A light beam from a light source (not shown) is applied to generate electric power in the solar cell 45.

The signal of the optical sensor amplified by the amplifier 52 is transmitted to the signal transmission means 7 provided under the rotary shaft 6 through a conductor (not shown). As shown in FIG. 5, the signal transmitting means 7 is roughly divided into an optical sensor side mounting device (light emitting diode mounting device) 75 and a control unit side mounting device (light receiving element mounting device) 76, and the optical sensor side mounting device. The (light emitting diode mounting device) 75 is provided with a light emitting diode 77 as a light sensor side mechanism, and the control unit side mounting device (light receiving element mounting device) 76 is provided with a light receiving element 78 as a control unit side mechanism. Therefore, the light emitting diode 77 as the mechanism on the optical sensor side and the light receiving element 78 as the mechanism on the control section side are mechanically separated, and the signal from the light emitting diode 77 is electromagnetically transmitted to the light receiving element 78. Become. The signal transmitted to the light receiving element 78 is transmitted to the control unit (not shown) through the conductor 80. Incidentally, the controller side mounting device (light receiving element mounting device) 76
Is provided on the base 80. Driving power for the signal processing circuit 52 and the light emitting diode 77 is supplied from the solar cell 45.

Next, the operation and effect of the photostability test apparatus 1 having the above-mentioned structure will be described.

First, a sample (not shown) is placed on the small sample table 42, and a light beam from a light source (not shown) is irradiated.
The sample table 4 and the small sample table 4 above it for uniform irradiation
2 is rotated. During this irradiation, the light sensor 5 measures the irradiation amount. The signal from the optical sensor 5 is amplified by the amplifier 52 and is transmitted to the signal transmission means 7 through the conductive wire in the hollow rotating shaft. The amplifier 52
Since the driving power of (1) is supplied from the solar cell 45 mounted on the sample table 4, external power can be saved.

The signal transmitted to the signal transmitting means 7 is converted into an optical signal by the light emitting diode 77 and the light receiving element 78.
Be transmitted to. Since the driving power of the light emitting diode 77 is supplied from the solar cell 45, the power can be stably supplied during the test. The signal transmitted to the light receiving element 78 is transmitted to a control unit (not shown) through a conductor 79 to adjust / control the light amount of a light source (not shown). Particularly, in the present embodiment, since the signal is transmitted by the optical signal, more accurate signal transmission is possible and the optical stability of the sample by the optical stability test apparatus 1 can be accurately performed.

[0046]

As described above, the light stability test apparatus according to the present invention has the signal processing circuit for processing the signal from the optical sensor, and the signal transmission means has the optical sensor side mechanism and the control section side mechanism. Since the two mechanisms are separated and it is decided to transmit the signal by electromagnetic action in the state of physical non-contact, the signal is accurately transmitted without noise in the signal. The light stability of can be tested accurately.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a photostability test apparatus according to a first embodiment of the present invention.

FIG. 2 is a circuit explanatory diagram of a signal transmission unit and a signal processing circuit in the photostability test apparatus according to the second embodiment of the present invention.

FIG. 3 is an explanatory diagram of a register in a signal processing circuit in the photostability test apparatus according to the second embodiment of the present invention.

FIG. 4 is a photostability test apparatus according to a third embodiment of the present invention, (a) is a plan view of a main part, and (b) is a front view of the main part.

FIG. 5 is a cross-sectional view of essential parts showing signal transmitting means in a photostability test apparatus according to a third embodiment of the present invention.

FIG. 6 is a schematic front view showing a conventional light stability test apparatus.

FIG. 7 is a perspective view of essential parts showing a signal transmission mechanism provided on a rotary shaft in a conventional optical stability test apparatus.

[Explanation of symbols]

1 Light Stability Test Device 2 Light Source 3 Optical System 4 Sample Stage 42 Small Sample Stage 43 Rotation Shaft 44 Drive Source 5 Optical Sensor 50 Signal Processing Circuit 501 Signal Processing Circuit (Optical Sensor Side) 502 Signal Processing Circuit (Control Unit Side) 51 Conductor 52 Amplifier 6 Rotating shaft 61 Rotating plate 62 Rotating belt 63 Rotating plate 64 Rotating shaft 65 Rotating drive source 7 Signal transmission mechanism 71 Optical sensor side mechanism (magnetic coil) 72 Control side mechanism (magnetic core) 73 Control side mechanism ( Magnetic coil 74 Amplifier (Signal processing circuit (control unit side)) 75 Optical sensor side mounting device (light emitting diode mounting device) 76 Control unit side mounting device (light receiving element mounting device) 77 Light emitting diode (optical sensor side mechanism) 78 Light receiving Element (mechanism on control side) 79 Conductor 8 Insulation 80 Mounting base 9 Slip ring 90 Mounting base 10 Slider 11 Terminal block

Continued front page    (72) Inventor Kentaro Shimizu             1-10 Amman Shinmachi, Takatsuki City, Osaka Prefecture             Gano Scientific Machinery Works F-term (reference) 2G050 BA09 CA01 DA01 EA03 EC01                       EC07

Claims (8)

[Claims] 1. A light source, a sample table for mounting a sample irradiated with a light beam emitted from the light source, an optical sensor for measuring the irradiation amount of the light beam attached to the sample table, and the optical sensor. In a photostability test apparatus having a signal transmitting means for transmitting a signal from the optical sensor to a control unit for controlling the light source, the signal transmitting means has a signal processing circuit for processing a signal from the optical sensor, and the signal transmitting means is an optical sensor side mechanism. An optical stability test apparatus comprising: a control section-side mechanism and the two mechanisms, which are separated from each other and which transmit a signal by an electromagnetic action in a physical non-contact state. 2. A light source, an optical system for adjusting a light beam emitted from the light source, a sample table for mounting a sample to which the light beam passed through the optical system is placed, and irradiation of a light beam attached to the sample table. In a photostability test device having an optical sensor for measuring an amount and a signal transmitting means for transmitting a signal from the optical sensor to a control unit for controlling the optical system, a signal processing for processing the signal from the optical sensor. An optical stabilizer characterized by having a circuit and the signal transmitting means having an optical sensor side mechanism and a control section side mechanism, the two mechanisms being separated and transmitting a signal by an electromagnetic action in a physical non-contact state. Sex testing equipment. 3. The photostability test apparatus according to claim 1, wherein the drive power of the signal processing circuit on the sample table side is supplied from a solar cell provided on the sample table. 4. The photostability test apparatus according to claim 1, wherein the drive power of the signal transmission means is supplied from a solar cell provided on the sample stage. 5. The optical sensor side mechanism and the control section side mechanism in the signal transmitting means are composed of a combination of a magnetic coil and a magnetic core.
The light stability test device described. 6. The optical sensor side mechanism and the control unit side mechanism in the signal transmitting means are composed of a combination of two magnetic coils.
The light stability test device described. 7. The photostability test apparatus according to claim 5, wherein the magnetic coil is a ferrite coil. 8. The signal processing circuit comprises an amplifier for amplifying a signal from the optical sensor, an analog-digital converter for converting a signal amplified by the amplifier into a digital signal, a digital data register for recording the digital data, and A data transmitter for transmitting a digital data register, comprising:
The light stability test apparatus according to 4, 5, 6 or 7.