In the field of precision optical manufacturing, the manufacturing method using industrial robots as the carrier has highlighted its advantages of being more economical and efficient than existing methods. The application of different end-effectors has expanded the scenarios and processing limits of optical polishing. However, concise and simplified polishing technologies remain challenging. To improve the versatility of industrial robots in different processes and reduce the number of polishing iterations, pre-polishing with uniform removal is introduced and optimized, providing an excellent basic surface for polishing and finishing. Combined with the performance of an industrial robot, we adopt a swing composite path, to which the motion parameters are adjusted and optimized to minimize the fluctuation of the overall overlap rate (within 5%). The optimal path is based on the uniform B-spline curve characterization, which improves the consistency of the dwelling time and reduces the complexity of pre-polishing, laying a theoretical foundation for efficient and high-quality optical manufacturing.
Large aperture optical element deformed by its own weight is caused is one of the important considerations when we design the optical system, designing a mirror support solution that reduces the effects of gravity is critical. Traditional methods cannot effectively and intuitively analyze mirror distortion. In this paper, the finite element method and the optical surface fitting with Zernike polynomial are used to optimize the support scheme. These two methods are mutually verified and this method which use two parts is verified by the optimization scheme of the Φ900mm standard spherical mirror. With optimization, the steel belt loading and unloading weight hammer support scheme is finally adopted, and the best solution with Φ705mmin the circumference and each aperture is 55mm on the back of the mirror is obtained. The theoretical mirror surface’s PV and RMS value equal to 7.36nm (1/86λ) and 1.64nm (1/386λ), which is a good basis for guiding production.
With the development of the digital airborne photogrammetry technology, the more performances of the optical system for airborne mapping camera are required, such as the longer focal and the wider field of view (FOV). At the same time, the secondary spectrum correction becomes more important and difficult for the optical system design. A high performance optical system of airborne mapping camera with 200mm focus and 2ω=60° FOV is designed in this paper. The range of work wavelength is from 430nm to 885nm. A two-layer HDOE with negative dispersive characteristic is used to eliminate the secondary spectrum in the process of optical system design. The diffraction efficiency of the designed two-layer HDOE is up to 90%. From the result of design, the MTFs in whole fields are over 0.5 at 90lp/mm, which shows that the system has a great image quality. Meantime, the thermal analysis is done at the temperature range between -20°C and 40°C. As a result, MTF curves of the system at-20°C ~40°C show that a great image quality is kept, which meets the design requirements.
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