潛望鏡式五百萬畫素十三倍光學變焦鏡頭於溫度-5°C至50°C溫差分析與八百萬畫素超廣角鏡頭之手機雙鏡頭設計

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蘇益論(Yi-Lun Su) 查詢紙本館藏

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光電科學與工程學系

論文名稱

潛望鏡式五百萬畫素十三倍光學變焦鏡頭於溫度-5°C至50°C溫差分析與八百萬畫素超廣角鏡頭之手機雙鏡頭設計

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至系統瀏覽論文 (2028-1-16以後開放)

摘要(中)

本論文為五百萬畫素潛望鏡式光學變焦鏡與超八百萬畫素廣角鏡頭之光學設計，潛望鏡式的規格為十三倍光學變焦，焦距範圍(4.29 mm~56.99 mm 13.258變倍比)，鏡頭不含稜鏡；含1片玻璃與1片IR Filter總長度為48.9mm、F#3.38~7.9、半視角為23.07°~1.84°，為了補足視角不足額外設計的超廣角鏡頭規格為，半視角為82°、F/#2.42、焦距1.587mm，鏡頭總長度含IR Filter為18.7mm。
鑒於溫度對鏡片參數之變化，針對潛望鏡式的規格做-5°C、50°C溫度變化，需考量鏡片折射率的溫度係數(dn/dT)，藉由變焦鏡光學系統本身移動間距的功能，給予調整優化後，分析其光學成像品質；調整後MTF值皆大於40%，常溫下(22C)MTF值大於62.3%，|SMTF-TMTF|(設計空間頻率)皆小於7.8%，且優於調整前的8.2%。而超廣角鏡頭的MTF值為61.1%以上，SMTF-TMTF|(設計空間頻率)小於7.4%，F-theta畸變小於1.38%。
最後也針對雙鏡頭進行機構設計，其機構長、寬、高分別為69mm、35mm、19mm，機身為鋁合金材質，尺寸皆符合行動裝置使用。
該雙鏡頭光學系統整體變倍比可達到35.91倍。
關鍵字：潛望鏡式、光學變焦鏡頭與超廣角鏡頭、雙鏡頭光學系統、溫度分析

摘要(英)

This thesis is the optical design of the 5-megapixel periscope type optical zoom lens and the 8-megapixel Ultra wide-angle lens. especially, Periscope-type specification is 13 times the optical zoom, and the focal length range (4.29 mm~56.99 mm 13.258 zoom ratio), the lenses haven′t included the prism; but include one piece of glass and one piece of IR Filter then its total length is 48.9mm, F#3.38~7.9, and the half-view angle of view is 23.07°~1.84°. The Ultra wide-angle lens specification is a half-view angle is 82°, F/#2.42, and a focal length is 1.587mm. The total length of lens including the IR Filter is 18.7mm.
For the temperature change of -5°C and 50°C for the specifications of the periscope, the temperature coefficient of the refractive index of the lens (dn/dT) needs to be considered, and the function of the moving distance of the zoom lens optical system itself is adjusted and optimized, and then analyzed. Optical imaging quality MTF values after adjustment are all greater than 40%. MTF values at normal temperature (22°C) are greater than 60%, |SMTF-TMTF| (design space frequency) are both less than 7.7% and are better than 8.2% before adjustment.
The MTF value of the Ultra wide-angle lens is above 61.1% and the SMTF-TMTF| (design space frequency) is less than 7.4% and the F-theta distortion is less than 1.38%.
The overall zoom ratio of the dual camera′s optical system can achieve 35.91 times. Finally, an optical mechanism is designed for dual cameras. The length, width, and height of the mechanism are 69mm, 35mm, and 19mm respectively. The body is made of aluminum alloy, and the size is suitable for mobile devices.

關鍵字(中)

★ 潛望鏡式
★ 光學變焦鏡頭與超廣角鏡頭
★ 雙鏡頭光學系統
★ 溫度分析

關鍵字(英)

★ Periscope type
★ Optical zoom lens with Ultra wide-angle lens
★ Dual camera system
★ Analysis of temperature

論文目次

摘要 i
Abstract iii
致謝 v
目錄 vi
圖目錄 x
表目錄 xv
第1章緒論 1
1-1前言 1
1-2 研究動機 3
1-3 文獻回顧 4
1-4 本論文章節架構 15
第2章設計原理 17
2-1 基本光學理論 17
2-1-1半視角、像高與有效焦距 17
2-1-2 F/#、有效焦距及入瞳口徑 18
2-2 潛望鏡式鏡頭介紹 19
2-2-1直角稜鏡 19
2-2-2鏡頭之鏡片高度 20
2-3 畸變種類 21
2-3-1 光學畸變 21
2-3-2 F-theta畸變 22
2-4 室溫下折射率介紹 24
2-5玻璃折射率與溫度變化的關係 24
2-5-1溫度變化與熱膨脹係數對鏡片參數的影響 26
2-5-2鏡片折光率(Power)與溫度關係公式 27
2-5-3 溫度於光學系統之補償方式 29
2-6 光學系統之有效口徑 30
2-6-1入瞳上的參考光線R1~R5 30
第3章五百萬畫素潛望鏡式十三倍光學變焦鏡頭設計 32
3-1 感測器規格 32
3-2 起始值選取 34
3-3 設計規格與目標 34
3-3-1變焦倍率 35
3-3-2像高、半視角、有效焦距 35
3-3-3 F/# 36
3-3-4 |SMTF-TMTF| 36
3-3-5 MTF 36
3-3-6橫向色差 37
3-3-7畸變 37
3-3-8設計規格與目標整理 38
3-4 設計流程 39
3-5 系統有效口徑 44
3-6 設計結果 44
3-6-1 MTF 47
3-6-2畸變結果 50
3-6-3橫向色差結果 53
3-6-4相對照度結果 56
3-6-5設計結果整理 57
3-7 公差分析 58
第4章潛望鏡式十三倍光學變焦鏡頭之溫差分析 65
4-1 溫度範圍選取 65
4-2變焦系統溫差補償方式 66
4-3 分析方式與流程 67
4-4 溫度分析-5°C與50°C之MTF 67
4-5 溫度調整後22°C分析 78
4-5-1溫度調整後與原設計比較 83
第5章八百萬畫素超廣角鏡頭設計 85
5-1 感測器規格 85
5-2 設計規格與設計目標 86
5-3 起始值選取 89
5-4 設計流程 90
5-4 設計結果 91
5-4-1 MTF 93
5-4-2畸變 94
5-4-3橫向色差結果 97
5-4-4相對照度結果 97
5-4-5設計結果彙整 98
5-5 公差分析 99
第6章外接式雙鏡頭機構設計 101
6-1 機構外觀 101
6-2 機構內部 103
6-3 機構工程圖 103
第7章結論 105
參考文獻 107

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指導教授

孫文信(Wen-Shing Sun)

審核日期

2023-1-17

推文