High speed Michelson interferometer microscope
The present invention provides a Michelson interferometer for capturing images of a vibrating sample comprising a coherent light source. The light source may be adapted to illuminate a sample with a constant brightness across the sample. The interferometer may also be configured to generate a 3D representation of a sample using a single frame for a predetermined phase of the sample. The 3D representations may be combined to create a 3D video representation of the vibrating sample.
1. A method of using a Michelson interferometer having a CCD camera to capture images of a vibrating sample comprising the steps of: providing a coherent light source, said coherent light source adapted to illuminate the vibrating sample with a coherent light and using the CCD camera to create a 3D representation of the vibrating sample by generating a single frame for a predetermined phase of the vibrating sample.
2. The method of claim 1 wherein said 3D representation is combined with at least one other 3D representation to create a 3D video representation of the vibrating sample.
3. The method of claim 1 wherein said coherent light is strobed at a frequency matching the vibration of the vibrating sample to allow the CCD camera to capture the shape of the vibrating sample at a predetermined phase in the vibration of the vibrating sample.
4. The method of claim 3 wherein a monotonically increasing phase shift is used between the strobing light and the vibrating sample to capture different phases of the vibration of the vibrating sample.
5. The method of claim 1 wherein the CCD camera is configured to use a one-to-one frame capture and a plurality of different frames from said one-to-one frame capture are used to cover the complete range of vibration of the vibrating sample.
6. The method of claim 5 further including the step of strobing said coherent light at a frequency greater than the harmonic frequency of the sample, and obtaining a plurality of frames at increasing phases of the sample.
7. The method of claim 5 wherein said coherent light is strobed at a frequency that is greater vibration of the vibrating sample.