Interference signal generator controlled by simulated aplanatism differences
A technology of interference signal and control signal, which is applied in the field of interference signal generator, can solve the problems that the signal amplitude cannot be set arbitrarily, and the signal generator does not have the ability to provide complex signal waveforms, etc., so as to improve debugging efficiency and reduce complexity
Active Publication Date: 2013-06-12
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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[0010] The purpose of this patent is to provide an interference signal generator device that simulates equal optical path difference control, which solves the difficulty that existing signal generators do not have the ability to provide complex signal waveforms, and overcomes the fact that the signal amplitude in existing signal generators cannot be set arbitrarily It has the characteristics of an arbitrary waveform generator, and also provides a sampling time reference consistent with signal changes, especially suitable for circuit debugging of interference systems
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[0035] The specific implementation of the present invention will be further described below. In order to complete the above work, it is necessary to design a complete circuit form according to the above principles, and the hardware design selection is as follows:
[0036] Microcontroller 1 and microprocessor 2 both choose DSP2812. The crystal oscillator 1 and crystal oscillator 2 that provide their working clocks respectively choose active crystal oscillators with an output frequency of 30MHz. The working clock of DSP2812 can be set to 150M through internal frequency multiplication parameters. Among the peripheral devices, the vertical tact switch is selected for the switch, the IS61LV25616AL-10TI is selected for the SRAM, the AD768 is selected for the DAC integrated circuit, the 74LVC4245 is selected for the level conversion transceiver, the AD845 is selected for the buffer operational amplifier conversion, and the output interface adopts a standard BNC socket.
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The invention discloses an interference signal generator controlled by simulated aplanatism differences. A basic principle of interferometer aplanatism difference sampling is utilized to generate a signal generating device for generating signals similar to interference signals. The interference signal generator is different from ordinary signal generator products, generated signals are not simple sine or pulse signals, and generation of the signals has output frequency of the signals, wherein the output frequency is controlled according to aplanatism differences. Wave forms of the signals are generated according to the characteristics of the interference signals. Two independent control units are adopted in design to respectively control the two kinds of the signals. The interference signal generator has the advantages that the wave forms are convenient to set, and the output frequency is controllable and flexible.
Description
Technical field: [0001] The invention relates to an interference signal generator, in particular to an interference signal generator for simulating equal optical path difference control. Background technique: [0002] Fourier spectral detection technology is to use the principle of Michelson (Michelson) interferometer to sample the interference signal of the measured target according to the equal optical path difference, and then pass the light intensity signal through inverse Fourier transform to obtain a spectral signal of the observed target. means of detection. [0003] The interference signal is generated by an interferometer, which generally requires a detector, an interference system, and an optical system. Detectors in the infrared band also need to work in a low-temperature environment, and Dewar and liquid nitrogen refrigeration are required for ground work. At the same time, a reference laser is also needed, and the reference laser signal is used to generate an ...
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IPC IPC(8): G01J3/45
Inventor 王海英华建文代作晓顾明剑
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI