Measuring method for micro-lens array focal length based on Newton method and Talbot effect
A technology of a microlens array and a detection method, which is applied in the field of optical detection, can solve problems such as complex detection of focal image distance, and achieve the effects of low cost, simple operation and simple detection.
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[0049] like figure 1 , 2 As shown, it is the detection system schematic diagram of the inventive method, the outgoing light of monochromator 1 converges on star spot plate 3 through condenser lens 2, according to optical analysis, when star spot plate 3 is positioned at the focal point of measured microlens 4, The outgoing wavefront of the microlens 4 under test is a plane wavefront A, and due to the Taber effect of the Langki grating 5, the diffracted wavefront after the Langki grating 5 is:
[0050] U ( x , y , z ) = Ac 0 + Ac 1 exp ( jk λ p x ) exp ( j πzλ p 2 ...
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