Tubular lens unit with chromatic correction capacity for ICS systems, has specifically defined chromatic length and magnification deviation values

摘要

The lens unit (TL) meets the requirements defined by the following two equations: [Equations 1 and 2, page 4] where CHL is the chromatic length deviation for the unit, CHL0 is the chromatic length deviation for the lens, CHV is the chromatic magnification difference for the unit, CHV0 is the chromatic magnification difference for the lens, lambda is the wavelength, mtau is the dispersion index for the optical components in the unit (defined by mtau = me = 1/lambda v, where e is the main colour index and v is the Abbe number), A is the test point, d1 is the distance between the first optical component (3) in the unit and the entrance pupil (2), phi is the refraction and T is the index for the lens in the unit.