| 摘要 |
PURPOSE:To eliminate an unusable space around the eye piece of direct optical view finder by putting lenses eccentric and then moving an incidence and an emission optical axis in parallel. CONSTITUTION:In an inverted Galilean finder consisting of a concave objective 11 and another concave objective B, when surfaces r2 and r3 are put eccentric by a prescribed extent, a light beam L1 becomes a light beam L2 by passing through surfaces A, B, C, and D. Consequently, little unnecessary space is formed over a convex lens 13, so other parts are wide, or a camera is reduced in size on the whole. The upward and downward, and left and right movements of the light beam are determined adequately. |
