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STV0680 数据表(PDF) 37 Page - STMicroelectronics |
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STV0680 数据表(HTML) 37 Page - STMicroelectronics |
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37 / 63 page  Version 3.4 37/63 STV0680B+ VV6410/6411/6500 STV0680 Camera System Defect Specification q Sensors VV6410/6411/6444 and VV6500 shipped before end Q1 2001 require Anti-speckle 1 q Sensors VV6500 shipped after start Q2 2001 require Anti-speckle 2 7.4 Definition of the "Test Conditions" 7.4.1 Optics q No Lens or IR filter q No dirt on sensor glass 7.4.2 Illumination and uniformity of scene No lens should be used. The intensity of required illumination and the uniformity of the scene can be defined thus. A defect-free image should give a luminosity histogramme (8 bits resolution) with the following statistics: 1 Mean: (45% of full scale) < Mean < (65% of full scale). Ideal luminosity (mid grey) = 50-60% of full scale. 2 Standard Deviation: Standard Deviation < 10. 7.5 Definition of a "Major Visible Defect" Anything which is visible with the naked eye under the conditions described, is worthy of further investigation. For example: |
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