A new kind of CMOS image sensor test method, which is different from test standards EMVA1288 and ESCC 25000, is proposed in this paper based on photo transfer theory by using the rough adaptive genetic algorithm (RAGA). This test method can measure both system gain and dark signal together by utilizing dark field grey value only in dark field. In this way the complexity of test is reduced, and high and low temperature tests and dynamic burn-in test become easy to be carried out. Without light field exposure, the stability and reliability of dark signal testing are improved in certain extent. The experiment result shows that, this new test method is available and dependable. It reduces the complexity of test equipment and environment, simplifies test flow, shortens test duration, and decreases test cost.
We demonstrate a screening and qualification flow of semiconductor lasers to verify their applicability for aerospace environments. The screening and qualification methods are based on background of standard methods, including Telcordia GR468, IEC 61751, MIL-STD-883 and GSFC. While determining the item of the flow, the failure modes in practical application are also considered. By using of the screening and qualification methods, the quality assurance agency could select the more suitable semiconductor lasers for space flight mission.
Based on the situation that imported low quality level of the semiconductor pump lasers are selected for most China space applications ,via analyzing the basic characters and failure mechanisms, and researching on relative international standards, this paper provides a quality assurance test items and procedures that applies to the imported low quality level semiconductor pump lasers, and introduces techniques and conditions for each tests. It is proved by an actual case that the quality assurance methods this paper provided are effective and feasible, and can be adopted by all the quality assurance for the imported low quality level pump lasers for China space application in the future.
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