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Light source pulsed with irregular pulse sequence in analog photometric signal evaluation for a test carrier analysis system
Light source pulsed with irregular pulse sequence in analog photometric signal evaluation for a test carrier analysis system
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机译:用于测试载体分析系统的模拟光度信号评估中以不规则脉冲序列脉冲的光源
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摘要
Method of detecting and evaluating analog photometric signals in a test carrier analysis system, and apparatus for carrying out the method. The test field of a test carrier is irradiated by a light source clocked in light-dark phases. The reflected light is detected by a measurement receiver over a measurement period having several light-dark phases, and integrated. An effective suppression of stray and secondary light, which permits measurement even without the hitherto conventional shielding from ambient light, is achieved by a method in which the sequence of the light and dark phases integrated over the measurement period is irregular in such a way that the Fourier-transformed frequency spectrum includes a large number of different frequencies. Each individual frequency therefore makes only a small contribution to the measurement result.
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