Patent ID: 7643223
Filing Date: 2010-01-05
Classification: G02B

Abstract:
1. An image pickup apparatus having an optical path reflecting zoom lens system, comprising: a zoom lens system; and an image pickup element which is disposed at an image side of the zoom lens system, and which changes an image formed by the zoom lens system, to an electric signal, wherein the zoom lens system comprises in order from an object side thereof a first lens unit having a positive refracting power, which includes a reflecting optical member having a reflecting surface which reflects an optical path, a second lens unit having a negative refracting power, a third lens unit having a positive refracting power, a fourth lens unit having a positive refracting power, and an aperture stop which is disposed between the second lens unit and the fourth lens unit, and the first lens unit has a position fixed with respect to a position of the image pickup element, and at least the second lens unit and the fourth lens unit are movable, and at the time of zooming from a wide angle end to a telephoto end, by changing a distance between the each of lens units, the second lens unit consists in order from the object side a negative lens element, a positive lens element, and a negative lens element.