Abstract: A compound for forming a metal-containing film to be contained in a composition for forming a metal-containing film used in manufacturing a semiconductor, where the compound for forming a metal-containing film is represented by the following general formula (M-1) or (M-2). This provides: a compound for forming a metal-containing film having better dry etching resistance than conventional resist underlayer film materials and also having high filling and planarizing properties; a composition for forming a metal-containing film containing the compound; a patterning process in which the composition is used as a resist underlayer film material; a patterning process in which the composition is used as a resist material; and a semiconductor photoresist material containing the composition.

Abstract: A zoom lens according to the present invention includes, in order from an object side to an image side, first to third lens units with positive, negative and positive refractive powers, and a rear group including two or more lens units, in which an interval between adjacent lens units is varied during zooming. The zoom lens includes a correction lens unit which has a function of moving an imaging position in a direction perpendicular to an optical axis. The correction lens unit includes, in order from the object side to the image side, a positive first subunit, a positive second subunit which moves in a direction having a component of the direction perpendicular to the optical axis, and a negative third subunit. Focal lengths of the zoom lens when focused at infinity at a wide angle end and the correction lens unit are appropriately set.

Abstract: A zoom lens according to the present invention includes, in order from an object side to an image side, first to third lens units with positive, negative and positive refractive powers, and a rear group including two or more lens units, in which an interval between adjacent lens units is varied during zooming. The zoom lens includes a correction lens unit which has a function of moving an imaging position in a direction perpendicular to an optical axis. The correction lens unit includes, in order from the object side to the image side, a positive first subunit, a positive second subunit which moves in a direction having a component of the direction perpendicular to the optical axis, and a negative third subunit. Focal lengths of the zoom lens when focused at infinity at a wide angle end and the correction lens unit are appropriately set.

Abstract: A zoom lens ZL includes: a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a third lens unit L3 having a positive refractive power, an N?1th lens unit, and an Nth lens unit, the lens units being arranged in order from an object side to an image side. The N?1th lens unit and the Nth lens unit are located on the image side with respect to an aperture stop SP.

Abstract: A zoom lens ZL includes: a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a third lens unit L3 having a positive refractive power, an N?1th lens unit, and an Nth lens unit, the lens units being arranged in order from an object side to an image side. The N?1th lens unit and the Nth lens unit are located on the image side with respect to an aperture stop SP.

Abstract: A zoom lens includes an N-1-th lens unit disposed second closest to the image side and an N-th lens unit disposed closest to the image side. The N-1-th lens unit and the N-th lens unit each includes a cemented lens, and move at zooming. For at least one of the N-1-th lens unit and the N-th lens unit, the relationship between the radius of curvature of a cemented surface of the cemented lens and the distance from the cemented surface to an image plane, the value of the larger amount of the amount of movement of the N-1-th lens unit and the amount of movement of the N-th lens unit at zooming from the wide-angle end to the telephoto end, the overall lens length at the wide-angle end, the focal length of the zoom lens at the wide-angle end, and a back focus at the wide-angle end are determined.

Abstract: Provided is a zoom lens including, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a rear lens group including a plurality of lens units. The zoom lens has a configuration in which an interval between each pair of adjacent lens units is changed for zooming. The first lens unit is configured to move for zooming. The rear lens group includes at least one lens unit having a negative refractive power. Further, a focal length of the first lens unit, a focal length of the second lens unit, a focal length of the zoom lens at the wide angle end, a total length of the zoom lens at the wide angle end, and a back focus at the wide angle end are each appropriately set.

Abstract: A fixed focal length lens includes, in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a positive refractive power and a third lens unit having a positive refractive power, the second lens unit and the third lens unit moving for focusing differently from each other to change a distance between each pair of adjacent lens units changes. The first lens unit includes, in order from the object side to the image side, a first lens having a negative refractive power and a second lens having a negative refractive power. A focal length of the fixed focal length lens in a case of focusing on an object at infinity, a focal length of the first lens unit, a focal length of the second lens unit and a focal length of the third lens unit are appropriately set.

Abstract: A fixed focal length lens including, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit and a third lens unit, wherein the first lens unit does not move for focusing, at least the second lens unit moves for focusing, a distance between each pair of adjacent lens units changes for focusing, and the first lens unit includes two negative lenses disposed in succession from the object side, and wherein a focal length of the fixed focal length lens, a focal length of the first lens unit, and a combined focal length of the two negative lenses of the first lens unit are appropriately set.

Abstract: A zoom lens includes an N-1-th lens unit disposed second closest to the image side and an N-th lens unit disposed closest to the image side. The N-1-th lens unit and the N-th lens unit each includes a cemented lens, and move at zooming. For at least one of the N-1-th lens unit and the N-th lens unit, the relationship between the radius of curvature of a cemented surface of the cemented lens and the distance from the cemented surface to an image plane, the value of the larger amount of the amount of movement of the N-1-th lens unit and the amount of movement of the N-th lens unit at zooming from the wide-angle end to the telephoto end, the overall lens length at the wide-angle end, the focal length of the zoom lens at the wide-angle end, and a back focus at the wide-angle end are determined.

Abstract: A zoom lens ZL includes: a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a third lens unit L3 having a positive refractive power, an N?1th lens unit, and an Nth lens unit, the lens units being arranged in order from an object side to an image side. The N?1th lens unit and the Nth lens unit are located on the image side with respect to an aperture stop SP.

Abstract: A zoom lens according to the present invention includes, in order from an object side to an image side, first to third lens units with positive, negative and positive refractive powers, and a rear group including two or more lens units, in which an interval between adjacent lens units is varied during zooming. The zoom lens includes a correction lens unit which has a function of moving an imaging position in a direction perpendicular to an optical axis. The correction lens unit includes, in order from the object side to the image side, a positive first subunit, a positive second subunit which moves in a direction having a component of the direction perpendicular to the optical axis, and a negative third subunit. Focal lengths of the zoom lens when focused at infinity at a wide angle end and the correction lens unit are appropriately set.

Abstract: Provided is a zoom lens including, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a rear lens group including a plurality of lens units. The zoom lens has a configuration in which an interval between each pair of adjacent lens units is changed for zooming. The first lens unit is configured to move for zooming. The rear lens group includes at least one lens unit having a negative refractive power. Further, a focal length of the first lens unit, a focal length of the second lens unit, a focal length of the zoom lens at the wide angle end, a total length of the zoom lens at the wide angle end, and a back focus at the wide angle end are each appropriately set.

Abstract: A fixed focal length lens includes, in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a positive refractive power and a third lens unit having a positive refractive power, the second lens unit and the third lens unit moving for focusing differently from each other to change a distance between each pair of adjacent lens units changes. The first lens unit includes, in order from the object side to the image side, a first lens having a negative refractive power and a second lens having a negative refractive power. A focal length of the fixed focal length lens in a case of focusing on an object at infinity, a focal length of the first lens unit, a focal length of the second lens unit and a focal length of the third lens unit are appropriately set.

Abstract: A fixed focal length lens including, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit and a third lens unit, wherein the first lens unit does not move for focusing, at least the second lens unit moves for focusing, a distance between each pair of adjacent lens units changes for focusing, and the first lens unit includes two negative lenses disposed in succession from the object side, and wherein a focal length of the fixed focal length lens, a focal length of the first lens unit, and a combined focal length of the two negative lenses of the first lens unit are appropriately set.

Abstract: A zoom lens, including, in order from an object side: a negative first unit being not moved for zooming; a second unit including at least one sub-unit that is moved during zooming, and having a positive refractive power as a whole; a negative third unit including an aperture stop, being not moved for zooming; a fourth unit including at least one sub-unit and being moved during zooming; and a fifth unit being not moved for zooming, at least three sub-units among the sub-units included in the second and fourth units being moved during zooming, in which focal lengths of the first and third units, and a movement amount of a sub-unit that is moved most in the second unit and a movement amount of a sub-unit that is moved most in the fourth unit during zooming from a wide angle end to a telephoto end satisfy predetermined conditions.

Abstract: A zoom lens including, in order from an object side: a positive first lens unit not moving for zooming; a negative second lens unit moving during zooming; a negative third lens unit moving during zooming; and a fourth lens unit not moving for zooming and including an aperture stop, the fourth lens unit including first and second sub-lens units arranged on object side and image plane side of the aperture stop, respectively, in which a relationship between a maximum height of an axial ray from an optical axis in the first sub-lens unit when focusing at infinity at a wide angle end, and a maximum height of an axial ray at the aperture stop when focusing at infinity at the wide angle end and of full open aperture, and a lateral magnification of the fourth lens unit when focusing at infinity at the wide angle end are appropriately set.

Abstract: A zoom lens, including, in order from an object side: a negative first unit being not moved for zooming; a second unit including at least one sub-unit that is moved during zooming, and having a positive refractive power as a whole; a negative third unit including an aperture stop, being not moved for zooming; a fourth unit including at least one sub-unit and being moved during zooming; and a fifth unit being not moved for zooming, at least three sub-units among the sub-units included in the second and fourth units being moved during zooming, in which focal lengths of the first and third units, and a movement amount of a sub-unit that is moved most in the second unit and a movement amount of a sub-unit that is moved most in the fourth unit during zooming from a wide angle end to a telephoto end satisfy predetermined conditions.

Abstract: Provided is an image pickup apparatus including, in order from an object side: a first lens unit; a stop; a second lens unit having a positive refractive power; and an image pickup element. The second lens unit includes a second lens sub-unit including only at least one positive lens. A refractive index (N2a) at a d-line of every lens included in the second lens sub-unit, an Abbe constant (?2a) and a partial dispersion ratio (?2a) of the every lens, a temperature-related relative refractive index change (dn2a/dTrelative) at the d-line, a focal length (f) of the overall system, a focal length (f2a) of the second lens sub-unit, an overall length (TD) of an image pickup lens, and a distance (BF) from an image-side surface of a lens arranged closest to an image side in the image pickup lens to an image plane of the image pickup element satisfy predetermined relationships.

Abstract: A zoom lens including, in order from an object side: a positive first lens unit not moving for zooming; a negative second lens unit moving during zooming; a negative third lens unit moving during zooming; and a fourth lens unit not moving for zooming and including an aperture stop, the fourth lens unit including first and second sub-lens units arranged on object side and image plane side of the aperture stop, respectively, in which a relationship between a maximum height of an axial ray from an optical axis in the first sub-lens unit when focusing at infinity at a wide angle end, and a maximum height of an axial ray at the aperture stop when focusing at infinity at the wide angle end and of full open aperture, and a lateral magnification of the fourth lens unit when focusing at infinity at the wide angle end are appropriately set.