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Production Test Solution for Infrared Focal Plane Array (FPA) Detectors
The core challenge of mass production testing is how to perform automated judgment on key parameters，dead pixels, non-uniformity, responsivity, NETD, etc.，for every detector within the shortest takt time, while ensuring batch-to-batch consistency. Yingshengyuan provides a complete toolchain from production test systems to device-level test systems and high-precision extended-area blackbodies, purpose-built for FPA volume production.
infrared FPA detectorproduction testproduction test systemdead pixel screeningnon-uniformity correctionIRDT-P
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Three Critical Phases of Production Testing
- Automated One-Click Test: The IRDT-P series production test system supports fully unattended operation. The operator simply places the detector; the system automatically performs power-up, parameter configuration, signal acquisition, metric computation, and pass/fail judgment, drastically reducing per-unit test time.
- Batch Consistency and Screening: The IRDT device-level test system precisely measures responsivity, noise, NETD, non-uniformity, dead pixel ratio, etc., for every detector. Statistical thresholds are applied to automatically flag outlier units, ensuring that performance variation within a batch stays within acceptable limits.
- Dead Pixel and NUC Data Generation: Using high-precision extended-area blackbodies (e.g., IBBE series) to provide a uniform radiation field, the system directly generates dead pixel maps and correction coefficients during testing, saving calibration time in downstream system assembly.
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Recommended Equipment Selection
| Application | Recommended Equipment | Key Purpose |
|---|---|---|
| Inline inspection of finished detectors | IRDT-P Production Test System | One-click test, fast sorting, batch data management |
| Device-level performance evaluation | IRDT Device-Level Test System | Responsivity, noise, NETD, crosstalk, non-uniformity, dead pixel ratio, etc. |
| Uniformity correction and calibration | High-Precision Extended-Area Blackbody | Provides uniform radiation plane, supports dead pixel detection and correction coefficient calibration |
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Takt Time and Yield Optimization
Production testing must balance speed and accuracy. The IRDT-P system leverages parallel channel design and algorithm acceleration to compress per-unit test time to seconds. Built-in dynamic over-limit alarming flags units immediately when dead pixel ratio or non-uniformity exceeds thresholds, preventing waste in downstream processes. Statistical feedback also helps fine-tune process steps to gradually improve yield. For background on NETD and related concepts, refer to NETD Explained.
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FAQ
How does production testing differ from R&D testing?
R&D testing focuses on comprehensive parameter characterization and极限 performance verification, requiring longer test times and more items. Production testing, in contrast, concentrates on key pass/fail criteria (dead pixel ratio, non-uniformity, NETD thresholds), takt time, and consistency, demanding automated execution and pass/fail labeling. Yingshengyuan's IRDT-P series is specifically designed for the latter, supporting one-click testing and batch report generation.
How is batch-to-batch consistency ensured?
Every detector is measured under identical conditions using the IRDT device-level test system, with statistical control limits (e.g., ±3σ) applied. Test equipment is regularly calibrated using high-precision extended-area blackbodies to maintain a unified test baseline. The system also accumulates historical data to generate consistency trend charts.
What is the accuracy of dead pixel screening?
A combined criterion based on responsivity and noise identifies dead pixels and over-hot pixels. Using the blackbody's uniform radiation scene, the system automatically generates a dead pixel map and supports user-defined dead pixel ratio limits (e.g., ≤2%). Actual accuracy depends on the test system's signal chain noise and blackbody uniformity; Yingshengyuan provides a complete calibration solution.
Tell Us Your Testing Needs
Production test efficiency directly determines the delivery capability and cost of FPA products. Yingshengyuan provides a complete solution from equipment to automated workflows. For custom requirements or on-site test consultation, welcome to contact us for technical proposals and pricing.