Primary aberration changes produced by arbitrary movements of paraxial rays

Chen, Chao-Hsien

doi:10.1080/09500340701308740

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…The heights of the incident point and emergent point of the marginal ray are h and h , respectively. By using the optical invariant [12], we could infer the relationship among refractive index, focal length, angle of view, and image height, as expressed in Equation (8) [13].…”

Section: Specifications For Underwater Optical Systemsmentioning

confidence: 99%

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Optical Design and Optimization with Genetic Algorithm for High-Resolution Optics Applied to Underwater Remote-Sensing

et al. 2021

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In fields such as biology, archeology, and industry, underwater photogrammetry can be achieved using consumer-grade equipment. However, camera operations underwater differ considerably from those on land because underwater photogrammetry involves different optical phenomena. On the basis of the requirements and specifications of the marine vessel Polaris, we developed a novel underwater camera with prime and zoom lenses and a high resolving power. The camera can be used in the spectrum in shallow water and the blue–green spectrum in deep water. In the past, ordinary cameras would be placed in waterproof airtight boxes for underwater photography. These cameras were not optimized to the underwater spectrum and environment, resulting in no breakthroughs in resolving power. Furthermore, the use of the blue spectrum greatly increases during underwater and particularly deep-water surveying. Chromatic aberration and focus-point displacement generated by the shift from the shallow-water spectrum to the blue–green spectrum in deep water makes universal underwater photography even more difficult. Our proposed optical design aimed to overcome such challenges for the development of a high-resolution underwater surveying camera. We designed a prime lens and a zoom lens. We adopted a waterproof dome window on the outer surface as the basic structure and optimized it in accordance with the conditions of different water depths and spectra to obtain distortion within ±2% and high-resolution underwater imaging quality. For the zoom lens design, we employed a genetic algorithm in Zemax to attenuate chromatic aberration as a kind of extended optimization. This novel optical design that can be used in all waters is expected to greatly reduce the volume and weight of conventional underwater cameras by more than 50% and 60%, respectively, and increase their resolving power by 30–40%.

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Section: Specifications For Underwater Optical Systemsmentioning

confidence: 99%

“…The probability of the entire wheel is 1. We could obtain the area of each lens set on the wheel according to their fitness by using Equation (12).…”

Section: Introduction To Genetic Algorithm and Its Extended Optimization Specific For Chromatic Aberration For Photogrammetrymentioning

confidence: 99%

Optical Design and Optimization with Genetic Algorithm for High-Resolution Optics Applied to Underwater Remote-Sensing

et al. 2021

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“…In a similar way, the other three factors δE, γ, and γ can be proved to be invariant across the system. Finally, instead of using the intermediate ray data, these factors can be directly evaluated by the original and new ray data as [2] δE …”

Section: B Proof Of the Invariant Theoremmentioning

confidence: 99%

“…Based on an earlier investigation of Hopkins [1], we proposed a general algorithm [2] for evaluating the variations of primary aberrations (including Seidel aberrations, chromatic aberrations, and secondary spectrum) of conceptual thin lenses when the marginal and chief rays are arbitrarily changed; the optical invariants of the original and new configurations can have equal values or not. For thick lenses, the famous optical design program Code V provides the virtual "lens module" [3], using a variation of the mock ray tracing scheme by Walther [4][5][6], to evaluate the system aberrations influenced by the conceptual lens modules with specific first-order and aberration properties.…”

Section: Introductionmentioning

confidence: 99%

Conditions for having identical aberration behaviors of various thick lenses

Chen

2015

Appl. Opt.

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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.

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“…Specifying the targets of other aberrations such as coma S 2 , astigmatism S 3 , field curvature S 4 , distortion S 5 , pupil spherical aberration S 1 , and lateral chromatic aberration C T is not necessary because they can be expressed as combinations of K, S 1 , S 2C , and C L . 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.…”

Section: Introductionmentioning

confidence: 99%

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

Chen

2014

Appl. Opt.

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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.

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Primary aberration changes produced by arbitrary movements of paraxial rays

Cited by 9 publications

References 5 publications

Optical Design and Optimization with Genetic Algorithm for High-Resolution Optics Applied to Underwater Remote-Sensing

Optical Design and Optimization with Genetic Algorithm for High-Resolution Optics Applied to Underwater Remote-Sensing

Conditions for having identical aberration behaviors of various thick lenses

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

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