摘要:
The optical ambiguity function generator system includes a first Bragg cell (35) for coding a coherent light beam with a first signal, a first Fourier Transform lens (36) receiving the coded signal, a linear phase shifter (37') lying in the Fourier Transform plane of the first lens, a second Bragg cell (40) for coding the light beam received from phase shifter (37') with a second signal and a second Fourier Transform lens (41) receiving the light beam from the Bragg cell (40) to produce an ambiguity function at an ambiguity plane. The phase shifter comprises a part cylindrical lens (50) and a part spherical lens (51) fastened together, the part spherical lens being of opposite sign and of one half the focal length of the part cylindrical lens.
摘要:
An optical system for generating the ambiguity function for two signals uses one-dimensional spatial light modulators (34, 35; 39, 40) to code the signals into a beam of substantially coherent light. After the light has been coded with the first one-dimensional signal a Fourier Transform is performed by lens means (36). A linear phase shifter (37) is placed in the Fourier Transform plane (U). This has the effect of creating a linear dependence along a second dimension when a second Fourier Transform is performed by second Fourier Transform lens means (41) and produces the ambiguity function at the ambiguity plane (U 3 ).
摘要:
An optical system for generating the ambiguity function for two signals uses one-dimensional spatial light modulators (34, 35; 39, 40) to code the signals into a beam of substantially coherent light. After the light has been coded with the first one-dimensional signal a Fourier Transform is performed by lens means (36). A linear phase shifter (37) is placed in the Fourier Transform plane (U). This has the effect of creating a linear dependence along a second dimension when a second Fourier Transform is performed by second Fourier Transform lens means (41) and produces the ambiguity function at the ambiguity plane (U 3 ).