The Optical System Design For Wide-band And Six-frame Framing Camera

High-speed framing camera has been widely used in the fields of scientific research,weapons detection,medical testing and sports competition,etc.With the application of framing camera,people's requirements for framing camera have gradually been increased on the spatial resolution,time resolution and other optical performances.Therefore,there is great significance to research the optical system of high-speed framing camera.Optical system of framing imaging is the core component of high-speed camera,so the work of this paper revolves around the design of framing imaging system and the main contents include:1?The task of making the design scheme of the high-speed framing camera has been completed.The high-speed framing camera is composed of three parts: the optical frame imaging system,the shutter control system and the image processing system.The imaging system can be divided into objective lens,relay lens and framing structure.On the basis of analyzing the working principle and characteristics of several spectroscopic elements and considering the design requirements,the prism was decided to be used as the beam splitter and the focused light beam splitting structure was adopted,meanwhile,the spectral range of the system ranged from 380 nm to 800 nm.2?The work of optical system design and image quality evaluation has been completed.According to the optical system design scheme and requirements,the relay lens and beam splitter have been designed with CodeV.Relay lens and the objective lens were in coordination,achieving six images by using prism beam splitter in image space of relay lens.The mirror in framing structure was used to turn optical path,achieving the six images in one side of the system.The image quality of the optical system was evaluated in two software programs,CodeV and ZEMAX.Six images plane illuminations were analyzed in the LightTools software to verify the feasibility of the system's scheme.3?Designing mechanical structure and establish three-dimensional model.Combined with the optical system,the 2D structure of the relay lens was drawn with AutoCAD and the dimensions of the parts were determined.The three-dimensional model of the optical and mechanical structure were established with SolidWorks to ensure there was no interference between every part of the system.Picturing parts processing drawings,giving the size of the tolerances of parts base on the results of optical system tolerance analysis.4?The system assembly and performance testing have been completed.Installing the optical system after finishing the processing of optical components and mechanical parts.There were some tests of optical properties of the framing system,such as spatial resolution,distortion,energy transmittance,image plane consistency and image plane illumination.The results showed that spatial resolution was better than 40 lp / mm,the distortion was less than 1%,the energy transmittance was more than 61%,and the difference of the illuminance of the image was less than ± 8%,which satisfied the system requirements and had good practicability.