Taking lens system

A three-lens-element taking lens system for forming an image on a solid-state image sensor, comprising, from an object side:

• a first lens element formed of a uniform material and having a positive optical power;
• an aperture stop;
• a second lens element formed of a uniform material and having a meniscus shape with a convex surface on an image side thereof and having a positive optical power;
• and
• a third lens element formed of a uniform material, having a meniscus shape with a concave surface on an image side thereof and having a negative optical power,
• wherein the following condition is fulfilled:
• 0.05<T6/f<0.5
• where
• T6 represents an axial lens thickness of the third lens element;
• and
• f represents a focal length of the taking lens system as a whole.

A three-lens-element taking lens system for forming an image on a solid-state image sensor, comprising, from an object side:

• a first lens element having a weak optical power;
• an aperture stop;
• a second lens element having a positive optical power;
• and
• a third lens element having a concave surface on an image side thereof and having a negative optical power,
• wherein each of said first, second and third lens elements has at least one aspherical surface, and
• wherein the following conditions are fulfilled:
• |f/f1|<0.6
• −2.2<f/f3<−0.79
• 0.05<T6/f<0.5
• where
• f represents a focal length of the taking lens system as a whole;
• f1 represents a focal length of the first lens element;
• f3 represents a focal length of the third lens element;
• and
• T6 represents the axial lens thickness of the third lens element.

A three-lens-element taking lens system for forming an image on a solid-state image sensor, comprising a maximum of three optically powered lens elements consisting of, from an object side:

• a first lens of element having a positive optical power;
• a second lens element having a positive optical power;
• and
• a third lens element having a negative optical power,
• wherein each of said first, second and third lens elements has at least one aspherical surface, and
• wherein the following condition is fulfilled:
• −2.6<f3/f1<−0.15
• where
• f1 represents a focal length of the first lens element;
• and
• f3 represents a focal length of the third lens element;
• and further including an aperture stop disposed between said first and second lens elements.

A three-lens-element taking lens system for forming an image on a solid-state image sensor, comprising, from an object side:

• a first lens element having a positive optical power;
• an aperture stop;
• a second lens element having a meniscus shape with a convex surface on an image side thereof and having a positive optical power;
• and
• a third lens element having a meniscus shape with a concave surface on an image side thereof and having a negative optical power,
• wherein each of said first, second and third lens elements has at least one aspherical surface, and
• wherein the following condition is fulfilled:
• 0.05<T6/f<0.5
• where
• T6 represents an axial lens thickness of the third lens element;
• and
• f represents a focal length of the taking lens system as a whole.

A three-lens-element taking lens system for forming an image on a solid-state image sensor, comprising, from an object side:

• a first lens element having a positive optical power;
• an aperture stop;
• a second lens element having a meniscus shape with a convex surface on an image side thereof and having a positive optical power;
• and
• a third lens element having a meniscus shape with a concave surface on an image side thereof and having a negative optical power,
• wherein the following conditions are fulfilled:
• 0.05<T6/f<0.5
• −1.695<f3/f1<−0.15
• where
• T6 represents an axial lens thickness of the third lens element;
• f represents a focal length of the taking lens system as a whole;
• f1 represents a focal length of the first lens element;
• and
• f3 represents a focal length of the third lens element.