large aperture 中文意思是什麼

large aperture 解釋
大孔徑
  • large : adj 1 （體積，空間，數量，規模等）大的，巨大的；（權限等）廣泛的。2 （心胸）寬廣的，度量大的；（...
  • aperture : n. 1. 孔，隙縫。2. （照相機的）光圈；孔徑，口徑。
  1. The first aperture was sufficiently large to enter.

    最初出現的洞口已可容納一個人進去。
  2. For underexposed pictures, set a large aperture ( smaller number aperture setting ) or slower shutter speed. for overexposed pictures, set a smaller aperture ( large number aperture setting ) or faster shutter speed

    對于曝光不足的景物，可適當增加光圈（較小的光圈數）或選用較慢的快門速度。
  3. Observant photographers have noticed that not all lenses are created equal : large aperture lenses show strong out - of - focus effects while small - aperture lenses lead simply to a softening of the image

    細心的攝影者會發現不是所有的鏡頭都是一樣的：大光圈的鏡頭呈現強烈的失焦效果，而小光圈的鏡頭只是稍微的讓圖像柔化一些。
  4. This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development. its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror, analyze glass cutting principle, design specisl - use grinding wheel structure, select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid, look for the technological parameters such as the optimal acid concentration and etching time etc. ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and

    本論文的研究主要是瞄準國家高技術對大口徑輕型鏡的戰略需求而開展的。主要研究內容是：根據光學玻璃的物理與化學性能，選擇輕型鏡坯材料；用有限元法對鏡子的變形進行分析、計算，找出變形規律，優化設計400mm輕型平面鏡、 450mm輕型球面鏡鏡體結構；分析玻璃切削原理，設計專用磨輪結構，選擇合理工藝技術參數，完成400mm平面鏡輕量化減重孔的加工；分析氫氟酸腐蝕光學玻璃機理，尋找最佳酸濃度、腐蝕作用時間等工藝參數，實現400mm平面鏡減重孔應力與微裂紋的消除；討論分離器加工原理和工藝技術特點，完成400mm平面輕型鏡面形加工。
  5. Pe large aperture pipe material product line

    產品介紹pe大口徑管材擠出生產線
  6. Temporal characterization of thz pulses generated by large aperture photoconductive antennas

    大孔徑光電導天線產生的太赫茲脈沖時間特性研究
  7. The field in large - aperture photoconductors is mainly composed of bias field, space - charge field formed by transient distributing of carriers

    光電導體內的電場是偏置電場、光電導體內光生載流子的空間瞬態分佈所形成的空間電荷電場等疊加形成的合電場。
  8. Shibin wu ( optical engineering ) directed by yapei yang ， jiahu yuan manufacturing technologies for large - aperture lightweight mirror are one of the development directions in advanced optical manufacturing technologies. the lightweight mirror has the incomparable advantages than that of the solid mirror. the lightweight mirror has overcome the mirror surface deformation caused by selfweight of the solid mirror, reduces or eliminates the deformation of thermal expansion in solid mirror surface induced by environmental temperature variations and temperature gradient appeared on mirror body. mechanical weight - reduction is one of the three lightening technologies for large - aperture mirror. the technology has the advantages of simple process, small technical difficulty, common equipment conditions and wide material selection range. the technology has been extensively investigated and applied in the technical field of optical engineering at home and abroad

    它克服了實心反射鏡因自重而引起的鏡面變形，降低或消除了實心反射鏡因環境溫度變化及鏡體溫採用機械鉆銑輕量化技術的輕型鏡研製度梯度的出現而產生的鏡面熱膨脹變形。機械減重輕量化技術是大口徑反射鏡輕量化技術的三種方法之一。它具有工藝簡單、技術難度較小、設備條件要求不高和選材范圍廣泛等優點，在國內外光學工程技術領域得到了廣泛的研究和應用。
  9. Precise measurement system for reflectivity scanning of large aperture components

    大口徑元件反射率的鏡面掃描精密測量系統
  10. The method for third harmonic generation of large - aperture high - power solid laser is described which is the second nonlinear effect of two cascade crystals in this paper

    摘要敘述了大口徑高功率固體激光器，利用兩塊級聯晶體的二階非線性效應，對激光輸出進行諧波轉換，實現三次諧波輸出的方法。
  11. The dissertation is based on the item of scientific research - infrared phase - shifting twyman interferometer, which derives from nanjing research institute of astronomical optics & technology of chinese academy of sciences. the infrared phase - shifting twyman interferometer being developed is to be used in measuring rough surfaces, large aperture spherical surfaces, and so on

    本論文結合科研項目「紅外泰曼干涉儀」進行，該項目來源於中國科學院南京天文光學技術研究所，研製的干涉儀主要用於測量粗糙表面的面形、大口徑球面等。
  12. " g " designates the g - lens group, a selection of large - aperture, high - performance lenses

    G代表擁有大光圈及高質素的g系列鏡頭。
  13. 3. a ~ vaveguide h - t coupler with a large aperture and an inductive post is analyzed where the magnetic current distribution is assumed on the aperture and the current on the surface of the post

    將窗口等效為等效磁流源，而把匹配圓棒等效為電流源來處理，分析計算了這種耦合器的耦合特性。
  14. Computer controlled grinding and on - line testing of large - aperture planetary silicon carbide mirror

    大口徑碳化硅平面反射鏡的數控研磨與在線檢測
  15. Large - aperture optical system

    大孔徑光學系統
  16. Application the machine is mainly used for producing large - aperture pipe material. the produced pipe materials are widely used in water - supply pipe, gas pipe, chemical pipe agricultural irrigating pipe and others

    該生產線主要用於生產大口徑管材，生產的管材廣泛用於上水管，煤氣管，化工用管，農業灌溉和人民生活等方面的大口徑給，排水管等特殊用途的管材。
  17. To improve test precision modern optical system often uses optical element of large aperture

    現代光學系統多採用大口徑的光學元件來提高系統的測試精度。
  18. A serious factor, which influences on limiting energy characteristics of the modem large laser facilities for realizing inertial confinement fusion ( icf ), is an appearance of destructive effects in the frequency conversion crystals of large aperture placed in to the beams

    在為實現慣性約束聚變（ icf ）而進行現代大型激光驅動器的設計時，限制能量特性的一個關鍵因素，就是光路中大口徑諧波轉換晶體上所出現的破壞性非線性效應。
  19. Usually, a large aperture lens will give better results

    若使用大光圈的鏡頭，效果當然更理想。
  20. Large aperture lenses

    大口徑透鏡直徑
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