| 摘要 |
PURPOSE:To form a small-sized camera which uses an image reversal type miniature film having no parallax by providing a luminous flux splitting member having about 45 deg. angle at the intermediate of an imaging optical system. CONSTITUTION:A photographing lens system 1 is formed of an imaging optical system having a front lens 1a, an intermediate lens 1b having internally a splitting member 1c and a rear lens 1d on the optical axis bent at a right angle by a splitting member 1c. The member 1c is a semitransparent mirror which forms a finder optical system together with an eyepiece lens 7 provided on the optical axis which has transmitted the partial luminous flux incident to the lens 1a and advanced straightforwardly. A shutter 8 is installed between the intermediate lens 1b on the curved optical axis of the photographing system and the lens 1d. The need for a largesized reflecting mirror is thus eliminated and the height of the camera is decreased, whereby the size thereof is reduced and the operation is stabilized. |
