Inorganic Reflective Achromatic Quarter-Waveplate for Optical Pick-up Applications
Bibliographic record
Abstract
This paper discusses the design, fabrication and application of a quarter-waveplate (QWP) element to address reliability, retardance achromaticity, small wavefront distortion and low-cost aspects of polarization controlling components in high definition, three-channel optical-pickup systems. The retarder is an all-inorganic reflective QWP that provides achromatic 90° retardance for the three laser wavelength bands. These 200-mm wafer scale fabrication parts show a retardance uniformity of about 3%. The surface distortion of these thin-film coated components has been measured to be less than 0.01 waves RMS over 4.5 mm square aperture at 633 nm wavelength. These all-inorganic reflective QWPs developed by JDSU are flexible in design, durable and highly reliable under high light flux exposure and adverse environmental conditions. Several prototype parts have been tested for damp-heat, thermal cycling, low and high temperature storage and the measured 0.5% retardance variations after 2300 h is comparable to the errors of retardance metrology.
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How this classification was reachedexpand
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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".