Patent ID: 6115196
Filing Date: 2000-09-05
Classification: F41G,G02B

Abstract:
An apparatus, comprising:a first member having thereon first and second optical components, said first member being supported for movement between first and second positions, wherein said first optical component is respectively disposed along and spaced from an optical path when said first member is respectively disposed in said first and second positions, and wherein said second optical component is respectively spaced from and disposed along said optical path when said first member is respectively disposed in said first and second positions;a second member having thereon a third optical component, said second member being supported for movement to and from a third position in which said third optical component is disposed along said optical path, wherein said second member reverses direction as said second member passes through said third position;a drive mechanism operative to effect coordinated movement of said first and second members in a manner which implements first, second and third operational modes, wherein in said first operational mode said first member is in said first position and said second member is in a position in which said third optical component is spaced from said optical path, wherein in said second operational mode said second member is in said third position, and wherein in said third operational mode said first member is in said second position and said second member is in a position in which said third optical component is spaced from said optical path; andmechanical stops operable to prevent movement of said first member beyond either of said first and second positions, and to prevent movement of said second member beyond said third position.