Patent ID: 6407857
Filing Date: 2002-06-18
Classification: G02B

Abstract:
A lens barrel comprising, in order from a light incident side:a first optical system; a second optical system which converts a beam of rays emergent from said first optical system into a beam of parallel rays; a third optical system which introduces the beam of parallel rays emergent from said second optical system into an ocular; wherein said first optical system comprises a lens unit which forms an intermediate image and at least three light deflecting members which deflect the beam of rays, wherein said second optical system comprises a lens unit and a light deflecting member, and wherein said light deflecting member of said second optical system is constructed an arranged to turn around an axis that is perpendicular to a first optical axis and to a second optical axis, where a center axis of the beam of rays emergent from a most second optical system-side one of said light deflecting members of said first optical system in optical arrangement is defined as the first optical axis, and a center axis of the beam of parallel rays emergent from said second optical system is defined as the second optical axis.