Abstract: Method for conversion of a measurement of an lens (1) comprising the following steps: receiving an experimental lens measurement (EXP) of the lens (1) from a light measurement of the lens (1); determining from the experimental lens measurement (EPX) a digital lens model representing the lens (1) (Si); determining, based on the digital lens model, a converted digital lens measurement (SIM2) representing a converted lens measurement of the lens (1) (S2); determining, based on the experimental lens measurement (EXP1) and the converted digital lens measurement (SIM2), a measurement result (CON) for the lens (1) (S3).

Abstract: An optical module for imaging light emitting objects on an image sensor comprises a polarizing beam splitter having an entrance face, an exit face, first and a second return faces, a first reflector facing the first return face, a first achromatic quarter-wave retardation plate between the first return face and the first reflector, a second reflector facing the second return face, and a second achromatic quarter-wave retardation plate between the second return face and the second reflector. The first and second reflectors differ in at least one of their orientation with regard to the first and second return faces or their spectral properties. At least one of the first reflector and the second reflector comprises a dichroic mirror arranged between the respective achromatic quarter-wave retardation plate and a further mirror of the respective reflector. The dichroic mirror is tilted with regard to the further mirror of the respective reflector.