Compact Zoom Lens Design for a 5x Mobile Camera Using Prism

Abstract

This study presents the compact zoom lens with a zoom ratio of 5x for a mobile camera by using a prism. The lens modules and aberrations are applied to the initial design for a four-group inner-focus zoom system. An initial design with a focal length range of 4.4 to 22.0 mm is derived by assigning the first-order quantities and third-order aberrations to each module along with the constraints required for optimum solutions. We separately designed a real lens for each group and then combined them to establish an actual zoom system. The combination of the separately designed groups results in a system that satisfies the basic properties of the zoom system consisting of the original lens modules. In order to have a slim system, we directly inserted the right-angle prism in front of the first group. This configuration resulted in a more compact zoom system with a depth of 8 mm. The finally designed zoom lens has an f-number of 3.5 to 4.5 and is expected to fulfill the requirements for a slim mobile zoom camera having high zoom ratio of 5x.

Design of Two-group Zoom Lens System with Wide Angle of View Using Global Structure Function

“…첫째 줌렌즈 설계 [4][5][6][7][8][9][10] 에서 필요한 줌 궤적 계산을 해야 하고, 둘째 광각의 2군 렌즈를 가장 효과적으로 표현할 수 있는 구조함수를 정의해야 한다. 줌 궤적 계산은 각 군별 굴절능 배분의 문제와 직결되므로 2군 렌즈의 굴절 능에 대한 표현식에서 출발한다.…”

Zoom Lens Design for a 10x Slim Camera using Successive Procedures

“…If we separately convert the lens modules to real lens groups and then combine them to establish an actual zoom system, as in previous works [8][9][10][11], the position of the aperture stop at each group is changed. As a result, aberrations of each group are changed except spherical aberration and Petzval curvature.…”

“…In our work, after obtaining the lens module zoom system, the real lens groups are successively, not separately, designed to get a zoom lens system. Compared to the previous design methods [8][9][10][11][12], this approach can give a better starting zoom lens, and save time and effort.…”

“…Contrary to the paraxial method, since the lens module method employed in this study involves lots of physical quantities of the optical system, the first-order and thirdorder aberrations can be manipulated directly by using lens modules [6][7]. Several zoom lenses have been designed and evaluated by lens modules [8][9][10][11][12].…”

Non-imaging Optical Design of a Measurement Probe for LCD Display Used in a Color Analyzer

“…In order to achieve this purpose, color analyzer needs optical design with non-imaging treatment for gathering and illuminating colored lights within a small area on the sensor [6][7] . While optical designs were mostly reported on imaging optical system [8][9][10] , this study is willing to introduce how to design non-imaging optics by the analytical treatment using Gaussian (or paraxial) optics [11][12][13] . And then an obtained design from the analytical treatment is proceeded to be confirmed and completed by means of commercial software such as CODE V [14] and Light-Tools [15] .…”