Patent ID: 6930719
Filing Date: 2005-08-16
Classification: G02B,H04N

Abstract:
1. A lens unit structure for a single lens reflex digital camera, comprising a photographing lens block and a finder block, wherein said photographing lens block includes: a lens barrel having a plurality of guide shaft members extending in parallel with an optical axis of said photographing lens block, proximal ends of said plurality of guide shaft members being secured to said lens barrel and distal ends of said plurality of guide shaft members projecting out of said photographing lens block; and at least one lens group accommodated in said lens barrel, said at least one lens group being slidably supported in the direction of said optical axis by said plurality of guide shaft members, said plurality of guide shaft members preventing said at least one lens group from moving in a direction perpendicular to the optical axis of said photographing lens block; wherein said photographing lens block comprises an integrally formed unit that is separable from said finder block; and wherein said finder block includes a casing that accommodates a finder optical system, an image capturing element, and a beam splitter, an image receiving surface of said image capturing element being perpendicular to an optical axis of said beam splitter, said beam splitter splitting the light passed through said photographing lens block into light directed to said finder optical system and light directed to said image capturing element, said casing having a plurality of holes respectively receiving said distal ends of said plurality of guide shaft members provided on said lens barrel; wherein said plurality of guide shaft members regulate a positional relationship of an optical axis of said photographing lens block with respect to an optical axis of said finder block.