THERMALLY COMPENSATED IR LENS AND IR CAMERA COMPRISING SUCH AN IR LENS

摘要

The invention relates to an IR lens, formed by a monolithic body (1) made of a material with a refractive index of between 2.4 and 4.2, comprising an entrance surface (2), an exit surface (3), at least one first reflecting surface (4.1) and a real overall focal plane (1.2) disposed downstream of the exit surface (3), in which real overall focal plane a sensor surface (7.1) may be arranged. At least one of the optically effective surfaces represents an optical free-form surface which at least produces the effect of a plurality of spherical and/or aspherical surfaces. The invention also relates to an IR camera comprising such a lens.