Patent ID: 8867140

Claim:
A low distortion lens suitable for airborne photography, comprising: a first optical group including a plurality of optical elements; a second optical group, including a plurality of optical elements; an aperture located within the second optical group; and a third optical group, including a plurality of optical elements, the distortion of the lens being not more than 0.6%, the low distortion lens having a full field of view of at least 60°, with a quality performance field of 53°, the low distortion lens being telecentric to less than 11°, the low distortion lens being apochromatic over a range of at least 450 nm to 650 nm, the low distortion lens being athermal over a temperature range of at least −15° C. to +40° C., and the low distortion lens having a length that does not exceed 180 mm, an optical window not being included in the length.