REAL IMAGE TYPE BINOCULAR MAGNIFIER, ITS ADJUSTING METHOD, AND PRISM FOR THE REAL IMAGE TYPE BINOCULAR MAGNIFIER

摘要

PROBLEM TO BE SOLVED: To correct the inclination of left and right images when the convergence is doubled while reducing operator's burdens by deflecting the optical axes of left and right optical systems.;SOLUTION: Respective left and right magnifiers are provided with a magnifying optical system and a roof prism 12a for internal-reflecting the incident luminous flux four times and reversing the image in vertical and horizontal directions. An intersection L23 of the 2nd and 3rd reflection planes S2 and S3 crosses with a plane having an intersection L14 of 1st and 4th reflection planes S1 and S4 of the roof prism as a normal line by an angle ϕ[°](ϕ≠0). Provided that axes aligning with the left and right visual axes assumed when an object distance is infinite at a 1st eye position are expressed by X_L and X_R, rotation with the aforesaid axes as rotating axes is expressed by γ-rotation, an axis vertically intersecting the axes X_L and X_R in the position of the roof prism is expressed by Z, an axis vertical to the axes X_L and Z is expressed by Y_L, an axis vertical to the axes X_R and Z is expressed by Y_R, and rotation with the Y_L and Y_R as the rotating axes is expressed by β-rotation, the β-rotation of the left and right magnifiers is performed so that the optical axis and the visible axis may align with each other, and then, the γ-rotation is performed and the convergence is adjusted, and the inclination of the image is corrected by setting the angle ϕ.;COPYRIGHT: (C)2005,JPO&NCIPI