JC 471-1992 in English
VALIDArtificial quartz crystal sheet for photosensitive detectors
- Issued on:1992-06-26
- Implemented on:1993-02-01
- File Format:PDF
- Delivery:RFQ
| Standard No: | JC 471-1992 |
| Document status: | VALID |
| Title in English: | Artificial quartz crystal sheet for photosensitive detectors |
| Title in Chinese: | 光敏探测器用人造石英晶体片 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | RFQ |
| Issued on: | 1992-06-26 |
| Implemented on: | 1993-02-01 |
| Professional Classification: | JC-Building Material |
| Related Keywords: | artificial quartz crystal sheet
photosensitive detectors artificial quartz crystals photosensitive detectors introduction analysis uv flame detectors |
Introduction
Analysis of the core content of the standard
The JC 471-92 standard has formulated a complete technical system including dimensional tolerance, surface quality, and optical performance for the application of artificial quartz crystals in photosensitive detectors. The standard particularly emphasizes the spectral transmittance requirements of crystals in the 200-2500nm band, of which the ultraviolet band (200-400nm) must be ≥80%, and the visible light band (400-800nm) must be ≥85%.
Comparison of key technical indicators
| Performance parameters | Indicator requirements | Test method |
|---|---|---|
| Surface roughness | ≤Ra0.1μm | GB 1185 6x magnifying glass detection |
| Envelope density | ≤8 pieces/cm2(25-100μm) | GB 7896 standard method |
| Temperature shock resistance | -40℃~+60℃ cycle 2 times without cracks | 5.5.3 Test Procedure |
Typical Application Scenarios
In UV flame detectors, the use of artificial quartz crystals that comply with JC 471-92 standards can ensure:
- High transmittance (≥85%) for UV light in the 185-260nm band
- Maintain optical stability at -40℃ low temperature
- Withstand impact energy above 10J/cm2
Implementation Suggestions
1. Incoming inspection should focus on diameter tolerance (±0.02mm) and edge chamfer (≤1.5mm)
2. The temperature change resistance test must strictly follow the cycle conditions of 30min precooling + 2h constant temperature
3. The packaging and storage must use shockproof packing and maintain the ambient humidity <60%RH
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