focusing distance 中文意思是什麼
focusing distance
解釋
聚焦距離-
In course of auto - focusing, the paper takes the sum of the square of gray difference as focal distance evaluation function to decided that image is in focus or not quickly and put forward an effective auto - focus searching way based on threshold value and curve fitting. these improve speed and precision of auto - focusing
在自動聚焦過程中，論文採用了圖象的灰度差分的絕對值之和的平方作為焦距評價函數，解決了是否正確聚焦的快速判斷問題；採用了一種行之有效的基於閾值和曲線擬合的自動聚焦搜索方式，使聚焦速度和精度都得到了很大的提高。 -
The optical near - field distribution and propagation properties of solid immersion lens system are analyzed in detail when illuminated by linearly polarized focusing gauss beam. the change of the optical intensity and beam dimension at the bottom of solid immersion lens with different refractive index and different distance are discussed. the simulated results reveal that the higher the refractive index is, the stronger the optical intensity and the smaller the beam dimension at the bottom of the solid immersion lens will be
編制了對固體浸沒透鏡近場超高密度光存儲系統進行模擬的二維時域有限差分程序，實現了對固體浸沒透鏡光存儲系統的數值模擬；著重研究了線偏振的高斯光束通過固體浸沒透鏡的光傳輸和近場光場分佈特性；分析了固體浸沒透鏡底面出射光強、光斑直徑隨固體浸沒透鏡折射率的變化、光透過固體浸沒透鏡后的強度、光斑直徑隨離開固體浸沒透鏡底面距離的變化。 -
The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing. the equation describing the evolution of the laser spot is derived. it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam
考慮多光子電離效應和光學kerr效應，首次利用力學類比的方法研究了超短脈沖激光在電離氣體中的傳輸，詳細分析了傳輸距離與激光初始光斑、初始發散角以及激光功率的關系，提出了實現長距離傳輸的條件。 -
The position and size of the monochromator, focusing curvature radii and tilting angles of the germanium focusing monochromator under different different take - off angle, size and divergency of the second collimator and intensity loss due to the use of it were determined. the neutron flux at different wavelength, under different reflection and take - off angle of the monochromator and divergency of the first collimator, were given. the simulation on the aperture used for limiting beam size in front of the sample showed that, smaller the size of the aperture and further the distance from the aperture to the sample, greater the loss of the intensity and more serious the spread of the beam along vertical direction at the sample position which makes the practical sampling volume greater than expected
用蒙特卡羅模擬方法對中子應力衍射譜儀的設計方案進行了優化研究，提出了一系列可供參考的數據：確定了單色器的位置、尺寸、垂直聚焦單色器在不同起飛角下的聚焦曲率半徑和傾角；討論了第二準直器的尺寸和發散，以及使用第二準直器造成的強度損失；給出了在不同單色器反射面、起飛角、中子波長和第一準直器發散度的情況下樣品處的中子注量率，以及多種組合情況下譜儀的解析度曲線；對限束方孔的尺寸、距離樣品遠近對強度損失和測量中的影響做了深入研究。 -
A sil flying head is designed to keep the distance between sil and recording medium in near - field range. a sil optical data storage system is built up when the recording head is combined with sil flying head. meanwhile, using astigmatic focusing error detection technology and twin optical pick - up heads, a novel nontouching nanometer measurement method is developed to measure the flying height of sil, and provides us with a powerful tool to optimize the design of sil fly head
在sil存儲技術研究方面，首先提出一種光學玻璃熱熔加工製作sil的新方法，該方法克服了小半徑球透鏡加工的難題，成功製作出了半球固體浸沒透鏡；設計了sil飛行頭系統，並利用光學頭像散法聚焦誤差檢測原理，設計出一種雙光學頭sil飛行高度測量方案，實現了sil飛行頭飛行高度的測量。 -
This equipment utilizing the principal of rtaary focusing, the technique of double barriers and auomatic program, fulfils the breakthrough on high - dose, high precision conformal radiotherapy thechnique. it is integrated with advanced omagine equipment such as ct, mri and pet, and also with the world most advanced 128 guide double - video synchronied electro - encephalographic long - distance monitoring system for evaluation of eepilepsy patients pre - operation, in the operation and after operation. it combines multi - academic branches such as the department of neural medicine, neurosurgery, oncology, radiotherapy and imaginary, to form a combined therapeutic system
擁有世界先進的大型醫療設備旋轉式頭部體部伽瑪刀，該設備利用旋轉聚焦原理雙重屏蔽技術及自動化的治療程序，實現了大劑量高精度適形放療的技術突破，與先進的ct mri pet等影像設備及世界最先進的128導全數字化癲癇術前術中術后定位評估系統實現配套，形成了聯系神經內外科腫瘤科放療科影像科等多學科的綜合治療體系。 -
The limitations of current video technology, however, mean that the quality of the visual experience of the real world is significantly decreased, essentially to the level of the synthesized graphics, with everything focusing at the same apparent distance
然而，現有視訊技術仍有其限制，它所呈現的真實世界的視覺品質還相當差，甚至會降到合成圖像的水準，因為虛擬和實體的所有視覺焦點都在相同距離上。 -
The focusing properties of gaussian beams through a compound optical system are discussed. based on the matrix optical method, formulae of the beam width at the focal plane and imaging distance of focused gaussian beams through the system are derived
討論高斯光束經復合光學系統的聚焦特性，利用矩陣光學方法，推導出了高斯光束經復合光學系統聚焦后束腰寬度和像距的計算公式。 -
This paper introduces the structure of long distance belt conveyer with horizontal bend, focusing on the constraint conditions and method for calculating the bending radius and the practical application of the conveyor
摘要介紹長距離水平轉彎帶式輸送機的結構形式、轉彎半徑的限制條件、轉彎半徑設計計算及其在實際工程中的應用。 -
The field distribution and propagation properties in sil system is analysed, and the relationship between the focusing spot size and the defocusing amount is also described. moreover, a novel model is proposed on basis of the fdtd analysis that can make us increase the distance between sil and recording medium without decreasing the recording density
模擬的過程中還發現，在小尺寸sil透鏡（半徑為波長量級）離焦時，系統焦點可以被推移到離sil底面較遠的位置而不會產生大的解析度損失，根據該結果我們提出了一種增大sil底面與存儲介質間距的方案，該方案對于sil高密度光存儲系統的實用化研究具有重要意義。 -
According to the optics system of oblique camera, make certain the scheme of auto - focusing system, and analyze its principle in detail. this paper presents a new method in order to compensate out of focus of oblique photographic distance, the principle is very simple and it is steady and reliable for structure design
根據斜視相機光學系統的特點，確定了自動調焦系統方案，對其工作原理進行了詳細的分析與論述，並通過對相機斜距離焦的分析，提出了一種新的斜距離焦補償方法，其原理簡單，結構上實現起來穩定可靠，能夠完全實時補償某一典型高度上的斜距離焦。
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