Abstract:
A LADAR system includes a transmitter configured to emit a directed optical signal. The LADAR system includes a shared optical aperture through which the directed optical signal is emitted. The shared optical aperture includes a first pupil plane. The shared optical aperture receives a return optical signal that is based on the directed optical signal. The system includes a mirror with a hole through which the directed optical signal passes. The mirror also reflects the return optical signal towards an imager. The imager receives the return optical signal and generates an image. The image is based on a portion of the return optical signal. The system also includes a partial aperture obscuration at a second pupil plane. The partial aperture obscuration may block a portion of internal backscatter in the return optical signal. The system also includes a focal plane to record the image.
Abstract:
A method and apparatus (100) is disclosed for optically resolving one or more vibrating objects at an unknown distance using a vibrometer. The vibrometer includes a processor (120), a memory (119), and an optical device (111) including a transmitter and a receiver. The method includes transmitting a first optical waveform (112) having a linear frequency modulated chirp (110a) from the transmitter towards a region of space. At the receiver, a second optical waveform (113) reflected from the one or more vibrating objects in the region of space is received. The vibrometer determines both a vibration frequency and a range information associated with the one or more vibrating objects based upon one or more characteristics of the second optical waveform. The determined vibration frequency and range information are stored in the memory (119) for processing by the processor (120).
Abstract:
A method and apparatus (100) is disclosed for optically resolving one or more vibrating objects at an unknown distance using a vibrometer. The vibrometer includes a processor (120), a memory (119), and an optical device (111) including a transmitter and a receiver. The method includes transmitting a first optical waveform (112) having a linear frequency modulated chirp (110a) from the transmitter towards a region of space. At the receiver, a second optical waveform (113) reflected from the one or more vibrating objects in the region of space is received. The vibrometer determines both a vibration frequency and a range information associated with the one or more vibrating objects based upon one or more characteristics of the second optical waveform. The determined vibration frequency and range information are stored in the memory (119) for processing by the processor (120).