1 June 1999 Design of diffractive optical element systems using lens modules
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By use of lens modules and diffractive optical elements, a new design approach is applied to the digital still camera lens system. The optimum initial design satisfying the specific requirements, and the real lens design obtained from the lens modules are presented. An initial design with a focal-length of 3.6931 mm is derived by assigning appropriate first-order quantities and third-order aberrations to each module along with the constraints required for the optimum solutions. In order to have a compact camera system, refractive and diffractive elements are used. This hybrid real lens, which is equivalent to the lens module, can be quickly obtained by matching the first- order quantities and the third-order aberrations of the module at a given conjugate. The constraints are the first- order quantities and third-order aberrations of the module obtained in the initial design. Compared to conventional design, this approach dramatically saves time and effort. The separately designed elements are then combined to establish an actual camera system. Finally, residual aberration balancing results in a lens which has enough performance over an f-number of 4.0 and is expected to fulfill all the requirements of a digital still camera lens.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sung Chan Park, Sung Chan Park, } "Design of diffractive optical element systems using lens modules", Proc. SPIE 3633, Diffractive and Holographic Technologies, Systems, and Spatial Light Modulators VI, (1 June 1999); doi: 10.1117/12.349319; https://doi.org/10.1117/12.349319


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