逆伽俐略式阿尔巴达式镜片共用型取景器设计

Design of viewfinder whose lenses applicable to both anti Galilleo type and Albada type

提出一种逆伽俐略式阿尔巴达式镜片共用的取景器系统，当仅使用二片镜片时即为逆伽俐略式取景器，加入中间镜片并镀以亮框膜、半透半反膜后，即成为阿尔巴达式带亮框式取景器。论文给出取景系统初始结构设计方法及设计实例，并通过光路追迹，最终确定了取景系统的全部参数，包括每片镜片的参数、镜片间隔、亮框和视差校正框尺寸等。

A viewfinder system, whose lenses applicable to both anti Galilleo viewfinder and Albada viewfinder, has been put forward. The anti Galilleo viewfirder can be achieved by using two pieces of lenses, and the Albada viewfinder can be achieved by adding another piece of lens and painting the bright fram film. The prelimanary parameters design method and an example of this viewfinder system have been given. By calculating the light tracks, all parameters of this vienfinder system, including each lens parameters, the distances between lenses, bright frame and parallex compensation frame sizes, have been decided.