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논문 기본 정보

자료유형
학술저널
저자정보
Sung Min Park (Dankook University) Jea-Woo Lee (Dankook University) Sung-Chan Park (Dankook University)
저널정보
한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.6 No.1
발행연도
2022.2
수록면
104 - 113 (10page)

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We present a method to count the overall length of the zoom system in an initial design stage. In a zoom-lens design using the concept of the group, it has been very hard to precisely estimate the overall length at all zoom positions through the previous paraxial studies. To solve this difficulty, we introduce T<SUB>eq</SUB> as a measure of the total track length in an equivalent zoom system, which can be found from the first order parameters obtained by solving the zoom equations. Among many solutions, the parameters that provide the smallest T<SUB>eq</SUB> are selected to construct a compact initial zoom system. Also, to obtain an 8× four-group zoom system without moving groups, tunable polymer lenses (TPLs) have been introduced as a variator and a compensator. The final designed zoom lens has a short overall length of 29.99 ㎜, even over a wide focal-length range of 4‒31 ㎜, and an f-number of F/3.5 at wide to F/4.5 at tele position, respectively.

목차

Ⅰ. INTRODUCTION
Ⅱ. OVERALL LENGTH OF THE FIRST ORDER EQUIVALENT OPTICAL SYSTEM
Ⅲ. ANALYSES FOR THE PARAMETERS OF AN INITIAL FOUR-GROUP ZOOM SYSTEM EMPLOYING TWO TPLS
Ⅳ. DATA ACQUISITION FOR A COMPACT FOUR-GROUP ZOOM SYSTEM EMPLOYING TWO TPLS
Ⅴ. DESIGN FOR AN 8× FOUR-GROUP ZOOM SYSTEM WITHOUT MOVING GROUPS USING TPLS
Ⅵ. CONCLUSION
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