摘要(英) |
In the Optical manufacturing industry, the reason that affects the image quality of Lens is not only caused by the surface processing error and decenter and tilt of assembly, but also the alignment error between the focal plane of lens and sensor or film. This misalignment will cause the image to become blurred. And The Modulation Transfer Function(MTF) is the most widely used analysis method to evaluate the image quality.
This thesis proposes to use the rotating stage to rotate the lens to be tested, and use the Shack-Hartmann Wavefront Sensor to measure its wavefront profile in different field and at different azimuths, and we can use the wavefront profile to calculate the focusing position of beam, and then use some experiment to calculate the center and vector of the axis of rotation, and finally get the focal plane profile of the Lens after the coordinate conversion, and we can also obtain the modulation transfer function by using Fourier transform and coordinate conversion on the measured wavefront, beam radius and focus position measured by wavefront sensor. |
參考文獻 |
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