椭球面有一个很有用的光学性质,即从一个焦点发出的光线,经其反射,会在另一个焦点上聚焦。这一特性在光学仪器中获得了广泛的应用。如电影放映机聚光灯的反射镜、固体激光器中的聚光腔等都是椭球面形。把光学玻璃毛坯加工成具有椭球面形之零件,需用椭球体模,而椭球体模又需用椭圆模板在车床上用靠模法加工。椭圆模板的加工目前一般采用两种方法。 The ellipsoid has a very useful optical property, that is, the light emitted from a focus, reflected by it, will focus on the other focus. This feature has been widely used in optical instruments. Such as movie projector spotlight reflector, solid-state lasers, such as the condenser chamber are ellipsoid-shaped. The optical glass blank processed into a spheroidal shape of the parts, the need to use ellipsoid mold, and ellipsoid mold and need to use oval template in the lathe by the mold method of processing. Ellipse template processing currently generally use two methods.