A novel PVDF thin-film photopyroelectric thermal-wave interferometry
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Bibliographic record
Abstract
Abstract A purely thermal-wave interferometric technique based on two-cavity photopyroelectric (PPE) detection using a thin film polyvinylidene fluoride (PVDF) has been developed. The interfering thermal waves within the PVDF thin film are generated by two intensity-modulated laser beams which pass through a sample and a reference medium and are incident onto the two active surfaces of the PVDF thin film from the opposite directions. The capabilities of this interferometry are investigated with a general theory. Applications of this technique to differential measurements of optical properties of solid laser crystals, thermal diffusivity of air and the detection of trace hydrogen in nitrogen were carried out and were compared with the conventional methods. The major feature of the technique is the efficient suppression of the background PPE signal and, therefore, significant enhancement of the measurement sensitivity, precision, and signal dynamic range. Key Words: pyroelectric thin filmthermal-wave interferometrythermal diffusivityhydrogen sensor
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it