JPS54156599A - Thermal diffusivity measuring apparatus - Google Patents
Thermal diffusivity measuring apparatusInfo
- Publication number
- JPS54156599A JPS54156599A JP6531878A JP6531878A JPS54156599A JP S54156599 A JPS54156599 A JP S54156599A JP 6531878 A JP6531878 A JP 6531878A JP 6531878 A JP6531878 A JP 6531878A JP S54156599 A JPS54156599 A JP S54156599A
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- case
- thermal diffusivity
- sound pressure
- acoustic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To perform rapid and highly accurate measurement by generating resonance acoustic vibrations within a hermetic case by a bar-form resonating member and measuring thermal diffusivity by the use of opto-acoustic effect.
CONSTITUTION: Electromagnetic waves such as laser light or other having been amplitude-modulated at high frequencies by a chopper or the like are absorbed in the absorption layer of a sample 1b through the electromagnetic wave incident window 3 of a hermetic case 2. This causes the acoustic vibrations owing to the pressure waves to be generated in the hermetic space of the case 2 by the evolution of heat of the sample 1a corresponding to the modulation frequencies. The vibrations are resonated by the bar-form resonating member of the specified size and shape in the case 2 and the amplitude of acoustic vibrations inversely proportional to the modulating frequencies become high sound pressure without any decrease in their amplitude. Hence, this sound pressure is detected at good S/N with a sound pressure detecting part 5. In addition, it is possible to process the detected value with a lock-in amplitude of a short time constant, thus the rapid and highly accurate measurement of thermal diffusivity owing to opto-acoustic effect may be performed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53065318A JPS5945100B2 (en) | 1978-05-30 | 1978-05-30 | Thermal diffusivity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53065318A JPS5945100B2 (en) | 1978-05-30 | 1978-05-30 | Thermal diffusivity measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54156599A true JPS54156599A (en) | 1979-12-10 |
| JPS5945100B2 JPS5945100B2 (en) | 1984-11-02 |
Family
ID=13283431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53065318A Expired JPS5945100B2 (en) | 1978-05-30 | 1978-05-30 | Thermal diffusivity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5945100B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023004776A (en) * | 2021-07-02 | 2023-01-17 | アイエルテクノロジー株式会社 | High-stability measurement method and measuring instrument of temperature response signal in laser periodic heating method |
-
1978
- 1978-05-30 JP JP53065318A patent/JPS5945100B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023004776A (en) * | 2021-07-02 | 2023-01-17 | アイエルテクノロジー株式会社 | High-stability measurement method and measuring instrument of temperature response signal in laser periodic heating method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5945100B2 (en) | 1984-11-02 |
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