초록 ▼

A catadioptric lens system capable of an automatic focusing operation without the necessity of increasing the outer diameter of a lens barrel is provided. The catadioptric lens system comprises a focusing optical unit, a focusing optical unit holder capable of movement in a direction of an optical a

A catadioptric lens system capable of an automatic focusing operation without the necessity of increasing the outer diameter of a lens barrel is provided. The catadioptric lens system comprises a focusing optical unit, a focusing optical unit holder capable of movement in a direction of an optical axis of the lens band for holding the focusing optical unit, and a driving means disposed between a mount and a reflecting mirror which is disposed to reflect light coming from an object toward an object side and connected directly or indirectly to the focusing optical unit holder for transmitting a driving force to the focusing optical unit holder at a reduced speed so as to move the focusing optical unit holder in the direction of the optical axis to effect focusing.

대표청구항 ▼

A catadioptric lens system capable of an automatic focusing operation which includes at least a first catoptric unit disposed to reflect light coming from an object toward an object side and a second catoptric unit disposed to reflect the light from said first catoptric unit toward an image side, co

A catadioptric lens system capable of an automatic focusing operation which includes at least a first catoptric unit disposed to reflect light coming from an object toward an object side and a second catoptric unit disposed to reflect the light from said first catoptric unit toward an image side, comprising: a focusing optical unit for focusing; a focusing unit holder holding said focusing optical unit, said focusing unit holder being moveable in a direction of an optical axis; a mount for attaching the lens system to a camera body; and a driving means disposed between said mount and said first catoptric unit and connected to said focusing unit holder for transmitting a driving force generated by a motor to said focusing unit holder, wherein said focusing unit holder is moved in the direction of the optical axis by said driving force.