APOCHROMATIC ATHERMAL LENS (VERSIONS) Russian patent published in 2016 - IPC G02B9/64 G02B13/14 

FIELD: optics.

SUBSTANCE: invention can be used in optoelectronic devices operating in radiation 0.4-1 micron spectral range and in a wide range of temperatures, for example, in reconnaissance cameras with matrix radiation receivers. First version of lens design contains along the beam path a biconvex lens, second and third biconcave lens, fourth lens in the form of a positive meniscus whose concave side faces the image space, fifth lens in the form of a positive meniscus whose concave side faces the object space, sixth biconvex lens, seventh biconcave lens and eighth lens in the form of a positive meniscus whose concave side faces the image space. Two last lenses are characterized with aspherical surface. Lens of second version contains along the beam path a first lens in the form of positive meniscus whose concave side faces the image space, second biconcave lens, third biconvex lens, fourth lens in the form of a positive meniscus whose concave side faces the object space, fifth biconcave lens, sixth biconvex lens, seventh lens in the form of a negative meniscus and eighth lens in the form of a positive meniscus whose concave surfaces of the image space, ninth , tenth and eleventh lenses made in form of a positive, negative and positive menisci whose concave surfaces face to the image space. All lenses are single and spherical.

EFFECT: larger linear field of vision, increase of rear section, reducing the angle of incidence of rays on the radiation receiver, wider spectral range with preservation of diffraction image quality.

2 cl, 12 dwg, 3 tbl