| 摘要 |
PROBLEM TO BE SOLVED: To provide a mirror frame for a digital camera in which a photographing optical system, a low pass filter and an imaging device are successively arranged from the object side, miniaturization can be attained and assembling efficiency also can be improved. SOLUTION: The mirror frame 1 for the digital camera comprises a 1st group lens 11, a 2nd group lens 12, a 3rd group lens 13, an LPF 14, and the imaging device 15 which are arranged successively from the object side. The 1st and 2nd group lenses 11, 12 are respectively held by 1st and 2nd group frames 4, 5 and allowed to be zoomed. The 3rd group lens 13 and the LPF 14 are fixed and held by a 3rd group lens holding frame 7 supported by a 3rd group frame 6 so as to be advanced/retreated and are advanced/retreated by focusing drive based on a contrast method. Since the 3rd group lens 13 and the LPF 14 are integrally advanced/retreated at the time of focusing, fine image pickup picture data can be obtained even when the LPF 14 is assembled without especially considering an error on the assembling position of the LPF 14 and the mirror frame 1 can be shortened. COPYRIGHT: (C)2005,JPO&NCIPI |
