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本文详细介绍了“便携式辐射测温仪”光学系统的设计方法,着重介绍系统相对孔径的选取,红外视场的确定及消杂光光阑的设计,并进一步分析了该系统的象差特性及其理论分辨率。该测温仪光学系统为望远物镜系统,属于小视场、大孔径光学系统。光学系统选择固定焦点式双球面组成的卡塞格林系统。这种双反系统比相同孔径的透射系统有较高的理论分辨率,而固定焦点式则使仪器结构简单。根据近轴光线光学计算及辐射度量学计算,在固定焦点情况下,系统接收器光敏面所接收的辐射通量在保证目标为一定大小时,不随目标距离变化,因而测温仪所测温度与目标距
In this paper, the design method of “Portable Radiation Thermometer” optical system is introduced in detail. The selection of relative aperture of the system, the determination of infrared field and the design of the evanescent stop are emphatically introduced. The aberration of the system is further analyzed. Characteristics and theoretical resolution. The pyrometer optical system for the telescopic objective system, belonging to a small field of view, a large aperture optical system. Optical system to choose a fixed focus double spherical Cassegrain system. This double-reverse system has a higher theoretical resolution than the transmission system of the same aperture, while the fixed-focus system makes the instrument structure simpler. According to the paraxial light optical calculation and radiation metrology calculation, under the condition of fixed focus, the radiant flux received by the photosensitive surface of the system receiver does not change with the target distance when the guarantee target is a certain size, so the measured temperature of the thermometer Target distance