focal spot 中文意思是什麼

focal spot 解釋
焦斑
  • focal : adj. 1. 【物理學】焦點的，（集中）在點上的，有焦點的。2. 【醫學】病灶的，病灶性的。adv. -ly
  • spot : SPOT ＝satellite positioning and tracking 人造衛星定位及跟蹤。n 1 斑點；污點；疵點，缺點。2 地點...
  1. Centroid position of focal spot of laser beam with aberration

    畸變光束的焦斑質心位置
  2. We found nuclear deformation lymphocytes with increased heterochromatin and impaired thymus epithelium cells with increased lysosomes and deformation of mitochondrias. ( 4 ) effects on mouse liver of so2 challenge : so2 can cause significant liver injury. he staining showed several kinds of necrosis of liver including spot necrosis, focal necrosis and submassive necrosis infiltrated with lymphocytes, monocytes, few neutrophils and eosinophils ; tem observation showed fatty degeneration with dispersion of fatty droplets and dilation of rough endoplasmic reticulums, acid degeneration with significant hyperplasia of mitochondrias, necrosis of hepatocytes with karyorrhexis and other organelles losing their normal structure

    （ 4 ）二氧化硫染毒對小鼠肝臟的組織學結構有明顯影響，可引起肝臟點狀壞死、灶狀壞死甚至片狀壞死，伴隨不同程度的炎性細胞浸潤；透射電鏡觀察發現二氧化硫可引起肝細胞脂肪變性、嗜酸性顆粒變和壞死，脂肪變肝細胞中可見大小不等的脂滴存在，嗜酸性顆粒變肝細胞中可見線粒體明顯增生，壞死肝細胞可見細胞核結構破壞，細胞器減少，細胞膜不完整。
  3. The excursion of centroid position of focal spot may be easily acquired with the centroid position expression of focal spot

    利用焦斑質心位置表達式，可分析和確定由於振幅調制和相位畸變導致的質心位置偏移。
  4. The centroid position of the focal spot directly depending on intensity distribution and phase slope distribution of near field is derived, and its physical meaning is described

    進一步推導了焦斑質心位置對光束近場強度分佈和相位斜率分佈的依賴關系式，並對該式清晰的物理意義進行了闡述。
  5. A cyclic radial shearing interferometer was used to diagnose the wavefront distortion of a laser system and an lcslm ( liquid crysnd spatial ligh modulator ) was used to control it. some results have been summarized as follows : l. according to the theory of scalar quanity diffeaction and the model of the random gaussian phase screen of low frequency wavefront, the effect of the low frequency wavefront with different rms gradient on the focal spot of a laser beam was studied

    本論文在激光光束波前畸變檢測和控制上進行了新的探索，主要就空間相位調制環路徑向剪切干涉儀以及它對波前畸變的檢測和液晶空間光調制器及其對中頻段波前畸變的控制進行了研究，其研究的內容和取得的成果如下：一、根據標量衍射理論，結合低頻波前畸變的高斯隨機位相分佈模型，研究了不同均方根梯度低頻畸變波前對激光光束焦斑聚焦性的影響，並採用描述中頻段波前畸變的功率譜密度概念，模擬計算了它對激光焦斑旁瓣的貢獻。
  6. In order to analyze the effect of aberration of amplitude and phase of laser beam on centroid position of focal spot, based on the fraunhofer formula for light wave scaler diffraction theory, according to the definition of first order moment centroid position, the general expression of focal spot centroid position directly depending on the complex amplitude of near field is derived

    摘要為分析振幅和相位發生畸變情況下光束焦斑質心位置所受的影響，以光波標量衍射理論中的夫瑯和費衍射公式為基礎，根據光斑強度分佈一階矩質心位置的定義，推導了直接依賴于光束近場復振幅分佈的焦斑質心位置的一般表達式。
  7. Spot diameters of just a few thousands of an inch can readily be attained with convenient short focal length lenses.

    用普通的短焦距透鏡不難得到直徑只有幾十微米的光點。
  8. A focal plane imaging is limited in catching object when spot - focusing horn lens antenna is applied in ballistic wake microwave interferometer. so we consider to designing multiple beam focusing horn lens antenna in order to augment the range of catching and enhance the probability of hitting the target

    本文的主要工作是針對彈道靶尾跡微波干涉儀里的點聚焦單波束捕捉目標的有效性能不足，而考慮設計一個具有點聚焦特點的多波束聚焦透鏡天線，以增大捕捉范圍和提高中靶率。
  9. When a larger waist w of the incident gaussian beam and a shorter focal length / of the lens are chosen, we can obtain an extremely - small dark spot size of the focused hollow beam, even approach the diffraction limit

    當選擇較大的入射準直高斯光束的束腰w _ 0和較短的薄透鏡焦距f時，可以在焦平面上產生一個很小的dss （或束半徑r _ 0 ） ，甚至可以接近衍射極限。
  10. The relationship between wave - front aberration and focal spot size was researched roundly, and the essential connection between focal spot energy shape and wave front gradient distribution was discovered, and a smarter parameter to evaluate wave front aberration was founded. based on this, the wave front aberration tolerance confined by focal spot size requirement was obtained through calculation and statistics method. 2

    比較全面地分析了系統內部波前誤差與光束焦斑尺寸之間的關系，找到了波前梯度分佈與焦斑能量分佈之間的本質聯系，提出了一個與焦斑尺寸關系最密切的波前誤差參數，並採用數值模擬和統計的方法得到了焦斑尺寸限制條件所要求的波前誤差限制條件； 2
  11. 5. otherwise, the applicability of cube comer array in the wide spectrum high power solid - state laser facility was researched as a relatively absolute part in this paper. through simulation, the action of cube corner array to reduce beam ' s focal spot size was testified visibly, and the smoothing effect of beam ' s modulation caused by cube corner array was proved primarily on the wide spectrum condition

    另外，作為一部分相對獨立的內容，本文對寬頻帶激光傳輸條件下採用角錐棱鏡陣列抑制低頻波前畸變的設想進行了探索性的研究，通過模擬模擬驗證了角錐棱鏡陣列具有抑制低頻波前畸變、提高激光焦斑能量集中度的顯著作用，並初步驗證了寬頻帶激光傳輸條件下近場振幅高頻調制的勻滑效應。
  12. Measurement of the effective focal spot size for industrial x - ray apparatus

    工業用x光射線儀有效焦點尺寸的測量
  13. From the fresnel diffraction equation, we calculated the intensity distribution of the fhb in free space, and found that there is an interested propagation property of the fhb before the focal plane. that is, with the increase of the propagation distance z, the dark spot size ( dss ) of the fhb is first increased, and then decreased, the dss has the maximum value at the position of z = - f / 2

    發現在焦平面之前有一個非常有趣的傳播性質，即隨著傳播距離z的增加，這一聚焦中空光束的暗斑尺寸（ dss ）先從另變大然後再變小，最大的暗斑尺寸的位置在z = f / 2處。
  14. To ensure the beam quality reach the requirement of high efficiency third harmonic conversion and small focal spot size, the correction of wave - front aberration had to be considered in the design of high power solid - state laser facility

    在高功率固體激光系統總體設計中，為了使光束質量滿足高效率三倍頻和小孔進腔打靶的要求，必須對激光的波前畸變進行校正。
  15. The plasma density scale length given by combination of ponder - motive force and thermal pressure is suitable for vh. considering the spatial intensity distribution in focal spot, the ra may give some contribution in some place

    X射線是各向同性的， x射線產額隨入射激光強度的降低而減小，當強度小於10 ~ （ 15 ） w cm ~ 2時，不再有硬x射線產生。
  16. The system will be utilized to date present spot - focusing lens antenna. with further improvement of this system, it is possible to have more completed and efficient sampling of focal plane

    通過單波束和多波束聚焦透鏡天線的試驗，驗證了所設計的單波束和多波束聚焦透鏡天線達到了預期要求，為今後的工程設計打下了良好的基礎。
  17. When the laser facilities are in operation, the position and direction of all the beams are subject to change due to the optical structural drifts excited by multiple input sources. these changes will influence the precision of the beam propagation and finally the focal spot positions on targets which are strictly dictated by the requirements of plasma physics experiments

    這些激光裝置在運行過程中，光學元件結構在外界激勵因素作用下容易產生漂移，使光束位置和方向發生改變，影響光束打靶定位精度，無法滿足精密物理實驗要求。
  18. Non - destructive testing - characteristics of focal spots in industrial x - ray systems for use in non - destructive testing - measurement of the effective focal spot size of mini and micro focus x - ray tubes

    無損檢驗.無損檢驗用工業x射線系統的焦點特性.小型和微型聚焦x射線管有效焦點尺寸測量
  19. The optimum position of focal spot of pumping laser through coupling system is calculated. in the fifth chapter, the optical characteristics of nd : yvo4 and lbo are studied. the astigmatism problem of resonant cavity is explored thoroughly under the condition of thermal lens effect

    第五章分析了nd ： yvo _ 4和lbo晶體的光學特性，深入分析了在引入熱透鏡效應的情況下諧振腔的像散問題，設計了四鏡z型折疊腔，應用abcd定律計算優化選擇了一組腔參數。
  20. Non - destructive testing. characteristics of focal spots in industrial x - ray systems for use in non - destructive testing. part 5 : measurement of the effective focal spot size of mini and micro focus x - ray tubes

    無損檢驗.無損檢驗用工業x射線系統中焦點的特性.第5部分:最小和最大聚焦x射線電子管的有效焦點尺寸的測量
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