Possesses the contemplation dot direction finding system the optical device

摘要

PURPOSE:To desirably control the automatic focus adjustment, automatic exposure control and other camera operation by detecting the correct visual axis direction by correcting the deflection in the direction of a visual axis and the direction of a visual point. CONSTITUTION:Generally, a certain deflection exists between the direction of a visual axis X and the direction Y of a visual point (visual line). In common, the direction Y of the visual point is on the line connecting a yellow spot B and a front eye part node point A. Though, when the movement of an eyeball is optically inspected, the visual axis X is easily detected by utilizing the axis symmetry of an eyeball optical system, while if the deflection in the direction of the visual point is not corrected, high precision can not be obtained. The simple method for correcting the deflection is obtained by manually inputting the correction value or other information. However, in this method, the deflection is generally measured separately, and the corresponding correction quantity is inputted, and generally the average input eye correction quantity is previously memorized into a microcomputer. An input device IP receives previously obtained correction quantity, and if the correction quantity is not obtained, the distinction of viewing through finder by using the right or left eye is inputted.