MULTIFUNCTIONAL IMAGE ACQUISITION DEVICE AND PRISM THEREFOR

摘要

PROBLEM TO BE SOLVED: To equalize optical path lengths of a plurality of emission image lights that are made incident to one imaging apparatus.SOLUTION: An incident image light is split into two light fluxes V1 and V2 by a second prism 10 and made incident vertically from a first face M1 of a first prism 20 in an equilateral triangular prism shape. The first prism 20 includes a splitting plane B1 that passes an intersection α2 of the first face M1 and a third face M3 and is vertical to a second face M2. The first light flux V1 is split into a reflective light V11 and a rectilinear light V12 by the splitting plane B1. The second light flux V2 is split into a reflective light V21 and a rectilinear light V22 by the splitting plane B1. The reflective lights V11 and V21 are fully reflected by the first face M1 without being fully reflected in the first prism 20, and vertically emitted from the second face M2. The rectilinear lights V12 and V22 are fully reflected by the third face M3 without being fully reflected in the first prism 20, and vertically emitted from the second face M2. The emitted image lights are simultaneously imaged by one imaging apparatus 30, and a plurality of images are acquired in a completely synchronized state.SELECTED DRAWING: Figure 2