?interferometer

interferometer發(fā)音

英：[??nt?f??'r?m?t?]　　美：[??nt?f?'r?m?t?]

英：　　美：

interferometer中文意思翻譯

n.干涉儀

interferometer詞形變化

名詞: interferometry | 副詞: interferometrically | 形容詞: interferometric |

interferometer常見例句

1 、An all-optical wavelength conversion based on XPM in a SOA-Sagnac interferometer is investigated in theory and experiments.───對(duì)基于SOA-Sagnac干涉儀的XPM全光波長(zhǎng)變換從理論上和實(shí)驗(yàn)上進(jìn)行了較為詳細(xì)的研究。

2 、On the last day of the test run, Gonzalez hands the director, Mark Coles, a plot of the interferometer output from that morning.───在測(cè)試運(yùn)轉(zhuǎn)的最后一天，龔扎雷茲把當(dāng)天早上取自干涉儀的數(shù)據(jù)圖交給主任寇斯。

3 、The nonlinearity error of the dual-frequency laser interferometer with two longitudinal modes and special subsequent electrical signal processing system was studied.───對(duì)具有特殊后續(xù)電信號(hào)處理系統(tǒng)的雙縱模雙頻激光干涉儀的非線性誤差進(jìn)行了研究。

4 、A Flat-Top Interleaver Based on a M-Z Interferometer with Two Ring Cavities[J].───引用該論文 張婷,趙帥,陳凱,李勇男,盛秋琴.

5 、Influence of the Length of SFL on the Measurement of Shape of Fizeau Interferometer[J].───引用該論文 孫曉紅,明 海,梁忠誠(chéng),劉 濤,吳云霞,謝建平,束繼祖.

6 、Finally, differences between the definitions of the sensitivities of the interferometer fiber-optic hydrophone and the DFB fiber laser hydrophone are described.───并且對(duì)干涉型光纖水聽器與DFB光纖激光水聽器在相位靈敏度以及物理涵義上的區(qū)別進(jìn)行了說明。

7 、Different kinds of laser interferometers were compared, and heterodyne laser interferometer was selected as the laser measurement system for sinusoidal pressure.───對(duì)不同激光干涉儀進(jìn)行研究比較，最終選擇外差式激光干涉儀作為正弦壓力的激光測(cè)量系統(tǒng)。

8 、National Science Foundation's Very Large Array radio telescope in New Mexico and the Plateau de Bure Interferometer in France.───專家們說，這些發(fā)現(xiàn)將會(huì)使科學(xué)家們對(duì)星系的誕生有個(gè)更加清晰的認(rèn)識(shí)。

9 、Characteristics Studies on Gires-Tournois Interferometer Used for Multi-Channel Chromatic Dispersion Compensation[J].───引用該論文 李琳,趙嶺,高侃,黃銳,陳高庭,方祖捷.

10 、Appling Michelson interferometer knowledge in physics,its application of precise size measure is introduced.───應(yīng)用物理學(xué)中的邁克耳孫干涉儀知識(shí),介紹其在精密尺寸測(cè)量中的運(yùn)用。

11 、A new optical configuration of grating interferometer that based on polarization-maintained fiber optical coupler (FOC) is put forward.───實(shí)現(xiàn)了光柵干涉儀測(cè)量準(zhǔn)確度與量程的分離,有望使光柵干涉儀的測(cè)量準(zhǔn)確度進(jìn)一步提高。

12 、Structure design of Mach-Zehnder interferometer in electrooptic integrated acceleration seismic geophone[J].───引用該論文 張燕君,陳才和,吳波,崔宇明,馬廣鵬.

13 、It is very valuable for accurate length measurement with Fizeau interferometer and Fabry-Perot interferometer.───對(duì)于指導(dǎo)精密測(cè)長(zhǎng)的實(shí)驗(yàn)和研究工作具有十分重要的意義，也是對(duì)相移算法理論的重要補(bǔ)充和完善。

14 、The highly accurate test and control of parallel of the two coherent beams of the stellar interferometer by CCD correlation tracker have been achieved.───CCD相關(guān)跟蹤器被應(yīng)用在恒星光干涉儀中，實(shí)現(xiàn)了干涉儀兩相干光束平行性的高精度探測(cè)與控制。

15 、Sinusoidal phase modulating technique is introduced in to the self-mixing interference in order to improve the displacement measurement accuracy of the self-mixing interferometer.───為了提高自混合干涉儀的位移測(cè)量精度,提出將正弦相位調(diào)制技術(shù)引入自混合干涉中。

16 、This two sets LIGO interferometer working together constitute an observation.───射電天文學(xué)的蓬勃發(fā)展為物理學(xué)家們新的探測(cè)途徑。

17 、There into a small solid Michelson Interferometer is devised which can lead to no interference to all the stray light except for laser beam and have the depressing effects on the stray light.───其中設(shè)計(jì)制作了一種小型實(shí)心邁克爾遜干涉裝置，它能使進(jìn)入該系統(tǒng)的除激光之外的所有雜散光不產(chǎn)生干涉，能對(duì)其干擾產(chǎn)生抑制作用；

18 、This paper quantitatively compares the spectrum characteristics between Fabry-Perot interferometer with gain medium and diffraction grating spectrometer.───對(duì)加入增益介質(zhì)的F-P干涉儀的光譜特性與衍射光柵光譜儀的光譜特性作了定量對(duì)比。

19 、The light is resolved by prisms, gratings, or by an interferometer.───光線用棱鏡、光柵或干涉儀分解。

20 、The signal processing methods of heterodyne interferometer dynamic data collection using FPGA are discussed.───介紹了利用現(xiàn)場(chǎng)可編程門陣列(FPGA)來實(shí)現(xiàn)外差干涉儀動(dòng)態(tài)數(shù)據(jù)采集的信號(hào)處理方案。

21 、Twyman-Green infrared phase-shifting interferometer and application[J].───引用該論文 何勇,陳磊,王青,朱日宏.

22 、The sensing arm of a optical fiber Mach-Zehnder interferometer is sticked on composite beams to detect the delamination in the beams with press method step by step.───將光纖干涉儀的一個(gè)臂粘貼在復(fù)合材料梁的表面,用逐點(diǎn)下壓的方法實(shí)現(xiàn)了復(fù)合材料的分層檢測(cè)。

23 、To meet the requirement of the specification of the large aperture component in ICF system, the sub-aperture stitching interferometer is introduced.───為了滿足我國(guó)ICF系統(tǒng)大口徑光學(xué)元件的檢測(cè)需要,提出了子孔徑拼接干涉檢測(cè)的方法。

24 、Microstress Installation and Experiment Result of the Interferometer[J].───引用該論文 李霞,袁艷,趙建科.

25 、Carilli and his colleagues focused on four such objects using the U.S.National Science Foundation's Very Large Array radio telescope in New Mexico and the Plateau de Bure Interferometer in France.───卡里利及同事利用新墨西哥州美國(guó)國(guó)家科學(xué)基金會(huì)的巨陣（VLA）射電望遠(yuǎn)鏡和法國(guó)的布爾高原干涉儀，將觀測(cè)集中在四個(gè)這樣的目標(biāo)上。

26 、A novel phase-shifting vectorial-shearing interferometer with a wedge plate phase-shifter is presented to measure the laser wavefront,which is common-path and based on Mach-Zehnder configuration.───為了實(shí)現(xiàn)對(duì)激光波面的等光程測(cè)試,設(shè)計(jì)了一個(gè)新穎的相移矢量剪切干涉儀。

27 、Coordinate measuring machine and optical interferometer are preferred instruments before and after polishing, respectively.Problems exist in both methods.───在拋光前后宜分別采用坐標(biāo)測(cè)量機(jī)和光學(xué)干涉儀，兩種方法都存在一些問題有待解決。

28 、Comparatively rudimentary interferometer observations suggested that this source is about 1. 5 across.───不很精確的射電干涉儀觀測(cè)表明,這個(gè)源的角徑約為1.5弧秒。

29 、In this paper, the photothermal wavelength modulation of a laser diode is employed in SPM interferometer to decrease the measurement errors caused by light-intensity changes.───利用光熱效應(yīng)調(diào)制光源波長(zhǎng)降低了光源光強(qiáng)變化引起的測(cè)量誤差。

30 、The Improvement on PGC Demodulation Method Based on Optical Fiber Interferometer Sensors[J].───引用該論文 柏林厚,廖延彪,張敏,賴淑蓉.

31 、The Laser Interferometer Space Antenna, LISA, is a detector that will fly in space.───LISA（全稱空間天線式激光干涉儀），是一個(gè)空間的探測(cè)器。

32 、By combining the transmission matrix of the symmetrical,Mach-Zehnder interferometer(MZI),the all-optical XOR model of LOA-MZI has been constracted,and two XOR operations are realized at 40 Gbit/s.───與對(duì)稱結(jié)構(gòu)馬赫曾德爾干涉儀(MZI)的傳輸矩陣相結(jié)合,構(gòu)建了線性光放大器馬赫曾德爾干涉儀全光邏輯異或門模型,實(shí)現(xiàn)了兩路40Gbit/s信號(hào)的異或運(yùn)算。

33 、Collimating Optical Component systems Using Heterodyne Interferometer[J].───引用該論文 張琢,孫東松,喬立杰,南京達(dá).

34 、The frequency measurement and direction finding are realized separately in traditional ECM field which the frequency obtained by frequency measurement receiver, and the direction finding is implemented using Interferometer etc.───傳統(tǒng)電子對(duì)抗的測(cè)頻、測(cè)向是獨(dú)立完成的,即先由測(cè)頻接收機(jī)測(cè)得信號(hào)頻率,且由測(cè)向天線采用如相位干涉儀方法完成測(cè)向。

35 、The transmittance of aerosol back-scatter signal through the interferometer is expressed as a function of the reflectance finesse, which is the unique system parameter.───將標(biāo)準(zhǔn)具透過率函數(shù)表達(dá)為唯一系統(tǒng)參數(shù)，即反射精細(xì)度的函數(shù)；

36 、A smaller, German-British experiment called GEO600 (because the interferometer arms are 600 metres long) started taking scientifically useful data in Hanover last month.───另外，德英兩國(guó)建立的，一個(gè)與上文提到的相比之下要小型一些的實(shí)驗(yàn)裝置GEO600（因?yàn)榧す飧缮婀鼙坶L(zhǎng)600米），一遇上個(gè)月在漢諾威開始展開收集科研數(shù)據(jù)的工作。

37 、The way of measuring the tiny vibration by Michelson interferometer by the aid of micro computer is introduced.───介紹了利用微機(jī)在邁克耳孫干涉儀基礎(chǔ)上進(jìn)行微弱振動(dòng)測(cè)量的方法.

38 、On the basis of analyzing the method of measuring gauge blocks for the Kosters interferometer,a new method,which uses the phase-stepping interferometry,has been brought.───在分析了傳統(tǒng)的柯氏干涉儀的量塊測(cè)量方法基礎(chǔ)上，提出運(yùn)用相位偏移干涉法的量塊測(cè)量法，最后給出了量塊測(cè)量的數(shù)據(jù)。

39 、Michelson interferometer has a simple structure,and is applied earliest.───Michelson干涉儀結(jié)構(gòu)簡(jiǎn)單，最早被用來檢測(cè)壓電薄膜厚度的變化。

40 、This beauty has an interferometer, which can convert the readings back into crystalclear sound.─── 我這寶貝配有干擾儀 能將感應(yīng)聲波轉(zhuǎn)換成清晰的聲音

41 、An optic interferometer system based on optical multiplication for measuring absolute distance was presented.───介紹了一個(gè)基于光學(xué)倍乘原理的絕對(duì)距離干涉測(cè)量系統(tǒng)。

42 、Auto-testing system for differential displacement sensor is composed of laser interferometer, computer, block of dynamic data collection interface, block of electromotor driver and some software etc.───差動(dòng)位移傳感器自動(dòng)檢定系統(tǒng)由激光干涉儀、計(jì)算機(jī)、動(dòng)態(tài)數(shù)據(jù)采集接口卡、電機(jī)驅(qū)動(dòng)接口卡及配套軟件等組成。

43 、C.K.Lee, G.Y.Wu, G.T.Pan, S.R.Chiang, and W.J.Wu，An Innovative Miniature Differential Laser Interferometer， Int.Sym. on Polari.Ana.And Appl. to Devices Tech.───吳錦源，創(chuàng)新雷射都卜勒振動(dòng)/干涉儀之研制-高性能微光機(jī)電系統(tǒng)之量測(cè)，臺(tái)灣大學(xué)應(yīng)用力學(xué)研究所博士論文，臺(tái)北，1997.

44 、To enable dimensional calibrations in the same set-up as for form measurements, a plane-mirror laser interferometer has been added.───使空間的口徑測(cè)定能夠在那相同的組合- 向上的當(dāng)做為形式測(cè)量，一個(gè)飛機(jī)- 鏡子激光干涉計(jì)有被增加。

45 、Carilli and his colleagues focused on four such objects using the U.S.National Science Foundation''s Very Large Array radio telescope in New Mexico and the Plateau de Bure Interferometer in France.───卡里利及同事利用新墨西哥州美國(guó)國(guó)家科學(xué)基 歐美大片 金會(huì)的巨陣（VLA）射電望遠(yuǎn)鏡和法國(guó)的布爾高原干涉儀，將觀測(cè)集中在四個(gè)這樣的目標(biāo)上。

46 、In this paper,several pivotal techniques of Mach-Zehnder interferometer which was a important part of the Sagnac/Mach-Zehnder mixed interferometer were reseached.───**功能仍在研究中。

47 、The principle and performance of a three port interferometer SAR-MTI for detecting and relocating moving targets are analyzed.───具體分析了用于檢測(cè)和**運(yùn)動(dòng)目標(biāo)的三端口SAR-MTI系統(tǒng)工作原理及性能。

48 、Compared with the form directly measured with interferometer, the results obtained with both methods are approximate.───將其與干涉儀直接測(cè)得的面形相比較,發(fā)現(xiàn)兩種方法得到的結(jié)果很接近。

49 、By analyzing the measuring data processing formula of laser interferometer, the theory to use end correction method to automatic real-time compensate the offset of the wavelength is presented.───介紹了激光干涉儀在現(xiàn)場(chǎng)測(cè)量中激光波長(zhǎng)的補(bǔ)償,通過分析激光干涉儀測(cè)量數(shù)據(jù)處理公式,提出了波長(zhǎng)補(bǔ)償值用終端修正的方式進(jìn)行自動(dòng)實(shí)時(shí)補(bǔ)償?shù)睦碚摗?/p>

50 、A Mach-Zehnder Interferometer has been designed and constructed for use in conjunction with the GALCIT Transonic Wind Tunnel.───中文摘要 電子式麥克風(fēng)雖以發(fā)展成熟，但在特殊場(chǎng)合如高電磁場(chǎng)，潮濕的環(huán)境下仍受到限制。

51 、Based on the principle of 4-channel quadrature detector system in homodyne interferometer,a kind of detector system consisting of Wollaston prism is introduced.───在單頻激光干涉儀四通道信號(hào)接收系統(tǒng)原理基礎(chǔ)上,提出一種采用Wollaston棱鏡的四通道信號(hào)接收系統(tǒng)。

52 、A fringe locking phenomenon in a laser diode feedback interferometer with optical feedback in a certain extent can be observed, which is studied in this paper.───在激光反饋干涉中,當(dāng)反饋光強(qiáng)度達(dá)到一定程度時(shí),可以觀察到條紋鎖定現(xiàn)象的產(chǎn)生。

53 、In this paper, authors present that how to apply wave theory of light to measure nanometer film thickness by used Michelson's interferometer.───為納米技術(shù)和納米材料的研究和生產(chǎn)打開了新思路，提供了新方法。

54 、Resonant mass detectors are less expensive to build than laser interferometer detectors.───建造共振質(zhì)量探測(cè)儀不像建造激光干涉計(jì)探測(cè)儀那么昂貴。

55 、In practice an interferometer is more sensitive if you keep it locked, or force the length between the mirrors to stay a certain number of wavelengths of light of the laser that's beamed into it.───實(shí)際上如果把干涉儀鎖定或者說迫使鏡子間的距離固定在一個(gè)確定的值，也就是注入光的確定波長(zhǎng)數(shù)目，那它將更為靈敏。

56 、For detecting side cooling uniformity of laser medium,a detecting method based on Mach-Zehnder interferometer is presented.───實(shí)驗(yàn)結(jié)果與理論分析相符,證明馬赫-澤德干涉法可以檢測(cè)晶體側(cè)面致冷均勻性。

57 、On the assumption of wavefront prolongation, a new optical phase retrieval algorithm by conventional lateral shear interferometer with wavelet transform is introduced.───在常規(guī)橫向剪切干涉儀的基礎(chǔ)上，利用波前周期延拓的假設(shè)，基于小波變換的方法實(shí)現(xiàn)了波前重構(gòu)。

58 、Each site has an interferometer with 4-km long arms that are enclosed in 1.2-m diameter vacuum pipes.The Hanford location also has a smaller interferometer with 2-km long arms.───在李文斯頓的干涉儀有一對(duì)封閉在1.2米直徑的真空管中的4公里長(zhǎng)的胳膊，而在漢福的干涉儀則稍小，只有一對(duì)2公里長(zhǎng)的胳膊。

59 、Putter says earlier this year he and his colleagues in Arizona performed the greatest feat yet in the high-tech world of interferometer:" We successfully combined the light from six telescopes.───今年初，帕特說，他和亞利桑那州的同事一起在干涉測(cè)量的高科技領(lǐng)域取得了最大的成就："我們成功地將6個(gè)望遠(yuǎn)鏡發(fā)出的光組合在了一起。

60 、An interferometer uses the wavelength in laser light as an extremely high precision ruler.───一臺(tái)干涉計(jì)在鐳射里使用波長(zhǎng)象一個(gè)極其高的精密統(tǒng)治者一樣輕.

61 、Meanwhile,we found that the latter one is more suitable for measuring machine tools linear positioning accuracy after inspecting a vertical milling machine by using the laser interferometer.───同時(shí),通過對(duì)一臺(tái)數(shù)控銑床的測(cè)量后,發(fā)現(xiàn)激光干涉儀測(cè)量法更適合于機(jī)床**精度的快速評(píng)定。

62 、White-light interference of Michelson interferometer to measure group refractive index is improved, where grating displacement sensor is used to increase the displacement precision of scanning mirror.───對(duì)測(cè)量群折射率的邁克耳孫白光干涉技術(shù)進(jìn)行了改進(jìn),采用光柵線位移傳感器提高反射掃描鏡的位移精度.

63 、The interferometer we choosed is American-simulated QRC-160A.───實(shí)驗(yàn)力求模擬現(xiàn)裝雷達(dá)干擾背景,干擾機(jī)選用仿美QRC-160A干擾機(jī)。

64 、In sinusoidal phase modulating laser diode interferometer, the main error source is the variation in output light intensity of light source.───在半導(dǎo)體激光正弦相位調(diào)制干涉儀中，光源輸出光強(qiáng)的變化是測(cè)量誤差的主要來源。

65 、The periodicity of the phase in the direction finding with interferometer confines the range of the direction finding and the width of the signal frequency.───干涉儀測(cè)向中相位的周期性,對(duì)測(cè)向范圍和信號(hào)帶寬提出了限制,而測(cè)向誤差和相位誤差對(duì)測(cè)距精度影響較大。

66 、Photothermal-Modulation Laser Diode Interferometer Insensitive to External Disturbances[J].───引用該論文 王學(xué)鋒,王向朝,于丹陽,錢鋒,盧洪斌.

67 、Michelson Interferometer Based on Self-Collimation in a Two-Dimensional Rod-Type Photonic Crystal[J].───引用該論文 Ni Bo,Li Hui,Chen Xiyao,Qiu Yishen,Chen Shuqiang,Bai Jibo.

68 、In order to ensure the measuring precision, the deformations of the interferometer mirrors induced by self-weight and the thermal effects must be controlled strictly.───在星間激光通信中,涉及對(duì)大口徑衍射極限激光波面的檢測(cè),為保證測(cè)量精度,必須嚴(yán)格控制波面干涉儀鏡子的自重和溫度變形。

69 、Cornell of JILA at the University of Colorado at Boulder and that of Mara Prentiss of Harvard University demonstrated an ingenious laser-based atom interferometer.───Cornell）的小組，與哈佛大學(xué)的普倫蒂斯（MaraPrentiss）的小組合作，以雷射做出了精巧的原子干涉儀。

70 、Influences of input optical pulses including the control pulse and probe pulse on the switching window of ultrafast nonlinear interferometer (UNI) are studied by numerical simulation and experiment.───就超快非線性干涉儀(UNI)的輸入光特性對(duì)其開關(guān)窗口的影響進(jìn)行了數(shù)值模擬和實(shí)驗(yàn)研究,輸入光包括控制光脈沖和探測(cè)光脈沖。

71 、In the determinable range, the electron density profile in the cross-section on HL-1 device has been measured by this interferometer.───在多道微波干涉儀的可測(cè)密度范圍內(nèi),我們測(cè)得了HL-1裝置等離子體小圓截面上的電子密度分布。

72 、But bringing beams of light together in exactly the same place and at precisely same time, a technique called interferometer, proved devilishly difficult and was largely abandoned until recently.───但是，分毫不差地在同一時(shí)間、同一地點(diǎn)將多束光線合在一起(這種技術(shù)叫做干涉測(cè)量法)是非常困難的，因而一直都被人們棄而不用，直到最近才引起人們的注意。

73 、All the components of the system including optics, radiometer, interferometer spectrometer, cryostat and ancillary subsystems are analyzed in detail.───具體分析了各個(gè)分系統(tǒng)的組成,包括光學(xué)器件、輻射儀、干涉光譜儀、制冷設(shè)備以及輔助設(shè)備。

74 、The interferometer is formed by inserting polarizers, a quarter-wave plate and an analyzer in the Jamin lateral shearing interferometer.───為了彌補(bǔ)傳統(tǒng)雅滿橫向剪切干涉儀的不足, 提出了一種相移雅滿橫向剪切干涉儀。

75 、A new method for compensating wavefront error is put forward to test large-aperture and high-order aspheres by using ZYGO interferometer, which uses the combination of a lens compensator and a computer-generated hologram (CGH).───為了能夠利用ZYGO數(shù)字干涉儀檢測(cè)大口徑深度高次非球面,提出了一種新的波前補(bǔ)償方法,即透鏡補(bǔ)償與計(jì)算全息相結(jié)合.

76 、A spherical system of a sort is tested by the advanced system and ZYGO interferometer repectively.───分析了光強(qiáng)畸變和移相誤差對(duì)系統(tǒng)的測(cè)量誤差的影響。

77 、The principle of Laser Interferometer and its formula for length measuring are discussed in this paper.───分析了激光干涉系統(tǒng)的原理,給出了長(zhǎng)度測(cè)量的計(jì)算公式。

78 、We proposed and developed a low-cost system for profilometry and thin film measurement at nanometer resolution.The system is based on the concept of a dual interferometer.───在本研究中，我們提出并建立一套可達(dá)奈米解析度的表面形貌及薄膜量測(cè)系統(tǒng)。

79 、The direction finding with interferometer has a high precision and a fast speed to find direction, on which the distance measuring with phase changing is based.───干涉儀測(cè)向有較高的精度和較快的速度,相位變化率測(cè)距建立在干涉儀測(cè)向的基礎(chǔ)之上。

80 、The Mach-Zehnder interferometer at 13.9 nm based on the multilayer beam splitters is used in 13.9 nm soft X-ray laser interference experiment,in which a clear interferogram of C_8H_8 laser-produced plasma is got.───使用多層膜分束鏡構(gòu)建了軟X射線馬赫貞德干涉儀,并應(yīng)用于13.9 nm軟X射線激光干涉實(shí)驗(yàn)中,獲得了清晰的含有C8H8等離子體電子密度信息的動(dòng)態(tài)干涉條紋。

81 、The residual stress was evaluated by the Stoney’s equation and optical interferometer.───利用光學(xué)干涉儀測(cè)試得到了薄膜的殘余應(yīng)力;

FPI是什么意思

英文全稱是Fabry-perot interferometer，是一種研究原子精細(xì)結(jié)構(gòu)的光學(xué)裝置。 fupenginternetion,是福蓬國(guó)際。 全稱為Fixed-Weight Price Index，是固定權(quán)數(shù)價(jià)格指數(shù)。 在我國(guó),FPI(Fame Price Index)又被稱作"農(nóng)產(chǎn)品生產(chǎn)價(jià)格指數(shù)",是指"一定時(shí)期內(nèi)農(nóng)產(chǎn)品生產(chǎn)者出售的農(nóng)產(chǎn)品價(jià)格水平變動(dòng)趨勢(shì)及幅度的相對(duì)數(shù)",該指數(shù)采用同比指數(shù)(上年同期＝100)。

為啥橫向剪切干涉儀的干涉條紋與剪切方向平行時(shí)，光束是準(zhǔn)直的

對(duì)不起 不是很清楚