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本篇文章介绍一种新型光学系统的光电测距仪。一般来讲,为了实现仪器的小型化,光电测距仪大部分是同轴布置发射光学系统和接收光学系统的。由于反射光强比发射光强弱得多,故使用大口径的接收透镜(物镜),因此发射光学系统通常是同轴布置在物镜筒里面。但是,要求光电测距仪具有较长测程和直接测距功能、(测站不设置反射器)时,就必须增加发射系统的光源功率,还要提高接收元件的灵敏度。若增加发射光源的功率,则因物镜里面和镜筒内壁等发射光在仪器内反射,成为微弱的杂散光,由接收元件所接收,使测量值产生较大误差。若提高接收元件的灵敏度,则接收元件容易受来自发光源的电感应影
This article describes a new optical system photoelectric distance meter. In general, in order to achieve the miniaturization of the instrument, most of the photoelectric range finders are the emission optical system and the receiving optical system arranged coaxially. Since the reflected light intensity is much stronger than that of the emitted light, a large-aperture receiving lens (objective lens) is used, so the emitting optical system is usually arranged coaxially inside the lens barrel. However, the requirements of optical range finder with longer range and direct ranging function, (station does not set the reflector), it is necessary to increase the power of the launch system of the light source, but also to improve the sensitivity of the receiving element. If the power of the emitting light source is increased, the emitted light inside the objective lens and the inner wall of the lens barrel will be reflected in the instrument and become weak stray light which is received by the receiving element, resulting in a large error in the measured value. If the sensitivity of the receiving element is increased, the receiving element is susceptible to electrocautery from the light source