Abstract: The present invention relates to an objective for photographic applications, comprising, in a sequence from an object side end to an image side end, a first lens group having a positive refractivity with at least one lens, a second lens group having a negative refractivity with a single lens, a third lens group having a negative refractivity with a single lens and a fourth lens group having a positive refractivity with at least one lens, wherein the lenses of the second and third lens groups each have a concave surface which face one another and define an air lens, wherein f1 is the overall focal length of the lenses of the second and third lens groups and f2 is the focal length of the air lens, and wherein the relationship 5.0?f1/f2?9.0 is true.

Abstract: The present invention relates to an optical lens system for a camera comprising in an order from an end at the object side to an end at the image side a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, and a fourth lens having a negative refractive power, wherein the second and third lenses are each designed as meniscus lenses, wherein the surface of the second lens at the object side is convex and the surface of the third lens at the object side is concave. The invention further relates to an imaging system having an image sensor that has a plurality of light-sensitive elements arranged in rows and columns and having such an optical lens system.

Abstract: The present invention relates to an objective for photographic applications, comprising, in a sequence from an object side end to an image side end, a first lens group having a positive refractivity with at least one lens, a second lens group having a negative refractivity with a single lens, a third lens group having a negative refractivity with a single lens and a fourth lens group having a positive refractivity with at least one lens, wherein the lenses of the second and third lens groups each have a concave surface which face one another and define an air lens, wherein f1 is the overall focal length of the lenses of the second and third lens groups and f2 is the focal length of the air lens, and wherein the relationship 5.0?f1/f2?9.0 is true.

Abstract: The present invention relates to a photographic objective having at least six lenses and at most eight lenses, with the first lens viewed from the object side being manufactured from glass and having a positive refractive power, an Abbe number of greater than or equal to 55, and a deviation of the relative partial dispersion from the normal line ?Pg,F between 0.008 and 0.035.

Abstract: The present invention relates to an optical lens system for a camera comprising in an order from an end at the object side to an end at the image side a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, and a fourth lens having a negative refractive power, wherein the second and third lenses are each designed as meniscus lenses, wherein the surface of the second lens at the object side is convex and the surface of the third lens at the object side is concave. The invention further relates to an imaging system having an image sensor that has a plurality of light-sensitive elements arranged in rows and columns and having such an optical lens system.

Abstract: Disclosed is a scanning system havinga light source,a collimator lens,a scanning unit anda scanning objective. The present invention is distinguished by that for the correction of the chromatic aberration over a large wavelength range, only the transverse chromatic aberration of the scanning objective is corrected, and that the intersection lengths of the light rays having wavelengths in the wavelength range over which the scanning system is to be corrected chromatically is dimensioned after the collimator lens in such a manner that the longitudinal chromatic aberration of the scanning system is compensated as well.

Abstract: An optical system for imaging the light from light sources having varying astigmatic differences of focus in different planes, having an optical element with an astigmatic effect and having an imaging lens system, the optical element having an astigmatic effect being provided with two lens components, the distance of which in the direction of the optical axis can be adjusted in order to correct astigmatic differences of focus varying from light source to light source and/or changing astigmatic differences of focus due to aging.