Image-space telecentric lens

An image-space telecentric lens comprising in order from a magnified side to a minified side:

• a first lens group;
• an aperture stop;
• and
• a second lens group, wherein the second lens group has an cemented lens of positive refractive power, the cemented lens is nearest the aperture stop as compared with other lens in the second lens group, and the condition:
• CA/H<5 is satisfied, where H denotes a maximum image height at the minified side, and CA denotes a clear aperture defined as a length between two opposite points of discontinuity of a magnified-side surface of a lens nearest the magnified-side.

An image-space telecentric lens, comprising:

• a first lens having refractive power;
• a second lens having refractive power;
• an aperture stop;
• a third lens having refractive power;
• a fourth lens having refractive power;
• a fifth lens having refractive power;
• and
• a sixth lens having refractive power, wherein the third lens, the fourth lens and the fifth lens are joined together to form a cemented triplet having positive refractive power, and the condition:
• 2.5<TT/EFL<6.5 is satisfied, where TT denotes a length measured along an optical axis and between two outermost opposite lens surfaces of the image-space telecentric lens, and EFL denotes an effective focal length of the image-space telecentric lens.