公开(公告)号：US20040156128A1

公开(公告)日：2004-08-12

申请号：US10759022

申请日：2004-01-20

Applicant: PENTAX Corporation

Inventor： Hidefumi Kaneko ,  Tetsuya Abe ,  Akihiro Sugiyama ,  Atsuo Kabeta

IPC: G02B005/04

CPC classification number: G03B13/24 ,  G02B5/045

Abstract: A superimpose-plate is put on a focusing glass, on which a subject image obtained through tile photographing optical system is formed. The superimpose-plate and the focusing glass are provided in an incident opening of a hollow pentagonal mirror. The superimpose-plate comprises a plurality of micro-prisms that are formed on the superimpose-plate. Each of the micro-prisms shows a triangle in a cross-section. The vertical angle of the triangle is identical in each of the micro-prisms. A ridgeline of each of the micro-prisms is parallel to the right-left direction of the picture plane of the view finder.

Abstract translation: 将叠加板放在聚焦玻璃上，在其上形成通过瓦片拍摄光学系统获得的被摄体图像。 叠加板和聚焦玻璃设置在中空五边形反射镜的入射口中。 叠加板包括形成在叠加板上的多个微棱镜。 每个微棱镜在横截面中显示三角形。 三角形的垂直角度在每个微棱镜中是相同的。 每个微棱镜的棱线平行于取景器的画面的左右方向。