Lens Design Fundamentals

Abstract

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Study and Design of Hybrid Triplet Lens

“…The Cooke triplet cementing three lenses, is a photographic lens designed in 1893 by Dennis Taylor [9]. This lens comprises a negative flint glass element in the Centre with a crown glass element on each side (see Figure 1), thus maintaining a large amount of symmetry.…”

“…The 1911 Encyclopedia Britannica wrote [8], the triplet object-glass, consisting of a combination of two convex lenses of crown glass with a concave flint lens between them, was introduced in 1765 by Peter, son of John Dollond, and many excellent telescopes of this kind were made by him. Nowadays, the design and performance of a Cooke triplet have a wide range application as a component in the electro-optical instruments [9]. To optimize such a lens (improving its image quality), the optical designers have to vary a lot of parameters, i.e., the six curvatures of the elements surfaces and the two inner spacing between elements.…”

“…GRIN lenses represent an interesting alternative to the use of aspheric surface (surface of a variable curvature) in lens design, since the lens performance depends on a continuous change of the refractive index within the lens material [7]. The Cooke triplets a photographic lens design designed and patented in 1893 by Dennis Taylor [8] [9]. It was the first lens system that allows elimination of most of the optical aberration.…”

“…And also, a brief discussion for techniques used in optical design to evaluate images formed by such an optical system is presented. Specifically, the optical designers are using many merit functions [9] to optimize such a system, i.e., RMS spot radius, wave front error and spherical aberrations transverse spherical aberrations (TSA) and longitudinal spherical aberrations (LSA). The design procedure of this study is introduced, and a new method for designing a hybrid triplet lens is presented.…”

Desenvolvimento e avaliação do desempenho de sistema óptico aplicado a sensoriamento remoto orbital

“…Algumas características físicas que variam de um vidro para outro são: cor, propriedades térmicas, densidade, características químicas entre outras (15).…”