Modelling the primary chromatic aberrations and secondary spectrum of conceptual thick-lens modules

2015

Two optical lenses with the same focal length but different lens thicknesses and principal plane locations can provide equivalent first-order optics on imagery if the marginal and chief ray heights and slope angles at their principal planes are equal, resulting in the same system magnification, object and image distances. In this paper, we will prove that if these lenses have the same primary aberrations (including Seidel aberrations, chromatic aberrations, and secondary spectrum) corresponding to the same marginal and chief rays then they must have the same new aberrations for any same new rays. This theorem is useful when designers would like to redesign a lens group in a system. The influence on the movements among lens groups, the special aberration properties of plane parallel plates, and afocal lens groups are also discussed.

“…An example [10,11] was given to simulate the behavior of an aspherical focal group retrieved from a 10× four-group zoom lens (Fig. 5) designed for digital cameras.…”

Section: B Proof Of the Invariant Theoremmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conditions for having identical aberration behaviors of various thick lenses

2015

“…Hopkins [1] and Chen [2] provided algorithms to evaluate the aberration variations of thin-lens components when the incident paraxial rays are changed. Chen [3,4] investigated the aberration variations of thick-lens components, which are modeled by three internal air-spaced thin-lens components. These algorithms are very helpful for solving the balanced targets for Gaussian characteristics and aberrations of each constructional component to give stable aberration correction to the system on focusing and zooming.…”

Section: Introductionmentioning

confidence: 99%

Methods of solving aspheric singlets and cemented doublets with given primary aberrations

2014

Purely algebraic algorithms are proposed for solving aspheric singlets and cemented doublets with desired focal length and primary aberrations. Singlets can meet the focal length, spherical aberration and central coma; cemented doublets can even meet the longitudinal chromatic aberration. An aspheric surface can be defined by either a conic or a fourth-order aspheric coefficient. In some situations, conic surfaces must be adopted to satisfy the required aperture diameters. They may have one or multiple aspheric surfaces and the aberration equations indicate that these aspheric coefficients of different surfaces are linearly dependent. Four examples including a classical front-stop singlet landscape lens, a DVD-rewritable (DVD-RW) pickup head lens, a singlet with double conic surfaces, and a cemented doublet in a telescope system are demonstrated.

Practical technique for balancing the optical aberrations among conceptual thin-lens components of optical zoom lenses

2022

Solving conceptual thin-lens components with balanced optical aberrations among different optical configurations is essential for lens design from scratch. This paper presents a general and practical method for building conceptual thin-lens components that can be further optimized by Code V (a well-known optical design program) to approach specific aberration targets. The conceptual component consists of a Code V’s lens module and a hologram with zero diffraction order. The latter provides spaces for storing the reference data of incident marginal and chief rays, spherical aberration, central coma, and longitudinal chromatic aberration without affecting the paraxial ray tracing. Those reference data are used to evaluate the real aberrations at different optical configurations by our earlier aberration variation algorithms [Appl. Opt. 55, 10363 (2016)APOPAI0003-693510.1364/AO.55.010363]. The model helps investigate the properties of lenses and solve the balanced aberrations by the optimization process. An example of solving a zoom lens with different optimization goals is given to demonstrate the usage of the method. Detailed design data are listed for verification.