exit beamの例文

• The design of the two prisms is such, that the entrance beam and exit beam are coaxial, i . e . the Schmidt Pechan prism does not deviate the beam if centered on the optical axis.
• The distinction between a roof prism and a porro prism is that for the roof prism the roof edge lies in the same plane as entrance and exit beam, while for a porro prism the ( left out ) roof edge is orthogonal to the plane formed by the beams.