There is a novel imaging method to solve the above two drawbacks. The effect it can be achieved is that the scanning mechanism rotates at a constant speed, and the optical aiming line can be kept still, which can avoid the smearing of the image and obtain a good imaging effect at any time. This is a feasible novel detection, which can realize a large field of view, while maintaining the high resolution of the optical imaging.
It was an effective way to keep the pivotal element of the lens under a specific temperature in order to increase the detection sensitivity, so that the thermocurrent caused by thermal radiation of the lens itself could be control under a lower level, But it was difficult to decide which element was the correct one and what was the temperature should be kept. To solve this problem, we, We used LightTools to simulate the cold optical lens deign and established a calculation and analysis method. which can be applied to the analysis of most infrared systems and has universal applicability.
Based on the principium of light field imaging, there designed a objective lens and a microlens array for gathering the light field feature, the homologous ZEMAX models was also be built. Then all the parameters were optimized using ZEMAX and the simulation image was given out. It pointed out that the position relationship between the objective lens and the microlens array had a great affect on imaging, which was the guidance when developing a prototype.
According to the requirements of practical application, the optical parameters were calculated. In order to reduce the difficulty in engineering, the design adopted the scheme of catadioptric structure, of which all the surfaces were designed as spherical surface type. In addition, a correcting component was designed, as well as a focusing component, for the purpose of improving the image quality and focusing. The optical design software CODEV was used to optimize the scheme and simulate the result. It was shown that the design result obtained an excellent image quality within the visible wavelength range of 0.45μm- 0.75μm. At last, the design result was tested by tolerance analysis.
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