OPTICAL SYSTEM FOR SHAPE MEASUREMENT DEVICE

This optical system for a shape measurement device is provided with: a parallel light irradiation system comprising a point light source, a collimator lens, and a telecentric lens having a double-side telecentric structure or an object-side telecentric structure that is irradiated with light from the collimator lens across an object to be measured; the imaging optical system includes an image sensor to which an image of a portion of the object to be measured generated by the light passing through the telecentric lens is projected. The point light source includes an LED, a diffusion member that diffuses and emits light from the LED, and a pinhole member in which a pinhole into which the light from the diffusion member is incident is formed. 本发明的形状测量装置用光学系统包括平行光照射系统和摄像光学系统，其中，所述平行光照射系统包括点光源、准直透镜、以及隔着被测量物体被来自所述准直透镜的光照射的双侧远心构造或物方远心构造的远心镜头，所述摄像光学系统包括图像传感器，由通过所述远心镜头的光产生的所述被测量物体的一部分的影像被投射到该图像传感器，所述点光源包括LED、使来自所述LED的光扩散并射出的扩散部件、以及形成有供来自所述扩散部件的光入射的针孔的针孔部件。