摘要(英) |
With the increasing demand of high-quality mobile phone lenses, the testing of miniature lenses is becoming more and more critical nowadays. For miniature optics, all the current metrology devices have difficulties to generate a stable and reliable measurement for the centration of single lens. Our laboratory has developed a high-speed, high-throughput automated wavefront aberration measurement system to overcome these difficulties. Owing to the extereme high dynamic range of the wavefront built, different shapes of lenses can be measured without optical nulling. So far, we have successfully measured lenses with shapes like thick meniscus, M-shaped, positive meniscus, asymmetric biconcave, plano-concave and other shapes. Depending on lens shape factor, the measurement quantified in terms of two surface decentration achieving record of measuerment repeatiblilty about 0.02-0.05 um.
Different from the other metrology devices, this high dynamic wavefront aberration measurement system has a measurement time of 5~10 seconds for single lens. Both the repeatability and the measurement speed have almost reached the industry standard, which has improved the problem of testing volume lens. |
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