r-branch r支r-branch emission r支发射r.m.s roughness 均方根粗糙度ra raman amplifier 拉曼放大器rabbet (1)插座，塞孔(2)槽口racah's notation  (symbol)拉卡符号race 座圈滚珠轴承race rotation 空轴racing test 空转试验rack (1)架，框架(2)齿条(3)导轨，滑轨rack and pinion gearing 齿条–小齿轮传动装置rackwork (1)齿条(2)调位装置(3)对光旋钮，调焦旋钮rad 拉德（辐射吸收剂量单位）radar  (radio detecting and ranging)雷达（无线电定向和测距）radar finder range 雷达测距仪radar prism 雷达棱镜radar recording camera 雷达纪录照相机radar-aimed laser 雷达瞄准激光器radiable 能辐射的radial (1)径向的(2)辐射状的radial adjustment 径向调节radial arm 旋臂radial astigmatism 径向像散radial axle 径向轴radial clearance 径向间隙radial component 径向份量radial direction 径向radial displacement 径向位移radial distortion 径向畸变radial distribution 径向分布radial energy distribution 径向能量分布radial flow laser 径向流动激光器radial force 径向力radial fourier analysis 径向传里叶分析radial function 径向函数radial grating 径向光栅，圆光栅radial line 辐射线radial missing 径向偏差radial motion 径向运动radial polynomial 径向多项式radial profile 辐射状剖面radial resolving power 径向分辨率radial reticle 径向调制盘radial scatter 径向散射器radial sweep 径向扫描radial triangulator 径向三角仪radial velocity (1)径向速度(2)视向速度radial wave resonator 径向波共振腔radial-shear interferometer 径向剪切干涉仪radially stratified fibre 径向分层纤维radian 弧度radian frequency 角频率radiance (1)辐射(2)辐射亮度(3)辐射率radiance  (luminance)factor 辐射系数radiance temperature 辐射温度radiant (1)辐射的(2)光光源，热源(3)辐射源(4)发光点radiant absorptance 辐[射]吸收比radiant density 辐[射]密度radiant efficiency 辐射效率radiant emissivity 辐射系数radiant emittance 辐射率radiant energy density 辐射能密度radiant exitance 辐射出射度，辐射发散度radiant exposure 曝辐[射]量radiant flux 辐[射]通量radiant flux [surface] density 辐[射]通量[面]密度radiant heat 辐射热radiant incidance 辐照度radiant intensity 辐射强度radiant power 辐[射]功率radiant reflectance 辐[射]反射比radiant transmittance 辐[射]透射比radiating capacity 辐射本领radiating cone 辐射锥radiating layer 辐射层radiating mirror 辐射瞻射镜radiation (1)辐射(2)放射(3)辐射能radiation cascade 辐射串级radiation damping 辐射阻尼radiation density 辐射密度radiation detector 辐射探测器radiation dose 辐射剂量radiation dosimetry 辐射剂量测定法，辐射剂量测量学radiation excitation 辐射激发radiation factor 辐射系数，辐射因数radiation field 辐射场radiation filter 辐射滤光片radiation image pickup tube 辐射图像摄像管radiation loss 辐射损失radiation measuring instrument 辐射测量仪器radiation meter 辐射[强度]仪器，辐射[强度]计radiation monitoring 辐射监控，辐射检查radiation pattern 辐射高温计radiation peak 辐射巅值radiation power 辐射功率radiation pyrometer 辐射高温计radiation source 放射线radiation sources 热幅光源radiation spectrum 辐射光谱radiation temperature 辐射温度radiation thermometers 热辐射温度感测器radiation thermometry 辐射差电堆radiation transfer 辐射传递radiation transition 辐射跃迁radiation trapping 辐射俘获radiation width 辐射宽度radiation-monitoring film 辐射监控软片radiation-noise-limited system 辐射噪声限制系统radiation-resistant 防辐射的，耐辐射的radiation-resistant glass 防辐射屏蔽radiationless decay 无辐射衰减radiationless resonance 无辐射共振radiationless transition 无辐射跃迁radiative (1)辐射的(2)发射的radiator (1)辐射体(2)辐射器(3)散热器，散热片radical (1)根的(2)根号radication 开方radio (1)无线电的(2)收音机(3)射电，射频的radio astronomy 射电天文[学]radio brightness 射电亮度radio dish 射电抛物面天线radio optics 无线电光学radio receiver 无线电接收机radio telescope 射电望远镜radio wave 无线电波radio-acoustic ranging 电声测距法radio-frequency beat (1)射频(2)拍频radio-frequency coupling technique 射频耦合技术radio-frequency emission 射频发射radio-frequency excited ion laser 射频激发离子激光器radio-frequency holography 射频全息照相术radio-frequency lamp 射频灯radio-frequency pumped 射频抽运的radio-frequency spectroscopy 射频频谱学radio-frequency (r.f.)射频radio-micrometer 辐射微热计radio-shielded 防高频感应的radio-spectrum 射频频谱radio-wave maser 无线电波激射器radio-wave reflection 无线电波反射radioactive 放射性的radioactive atom 放射性原子radioactive counter 放射性计数器radioactive decay 放射性衰变radioactive detector 放射性检测器radioactive half-life 放射性半衰期radioactive isotope 放射性同位素radioactive luminescent paint 放射性发光涂料radioactive metal 放射性金属radioactive source 放射源radioactive tracer 放射性示踪剂radioactivity 放射性radioautogram 自动射线照片radioautograph 自动射线照相，放射线映像，射线显迹图radioautography 自动射线照相术radiochromatogram 辐射色谱图radiochromatograph 辐射色谱图radiochromatography 辐射色谱法，辐射色谱学radiochrometer 射线硬度测定仪radiocrystallography 辐射性结晶体学radioelectronics 无线电电子学radiofrequency electrosurgical cautery apparatus 射频电烧灼器具radiogram 射线照片radiograph 射线照片radiographic film 射线照相胶片radiography 射线照相术radioheliograph 射电日像仪radiointerferometer 无线电干涉仪radioisotope 放射性同位素radioisotope detector 放射性同位素探测器radioisotopic tracer 放射性同位素指示剂radiology 放射学radioluminescence 辐射发光radiometer 辐射计radiometer package 辐射计装置radiometer telescope 辐射计式望远镜radiometric 辐射度的radiometric detector 辐射度探测器radiometric mapper 辐射度测绘仪radiometric measurement 辐射测量radiometric photometry 辐射测量光度学radiometric quantities 辐射度[物理]量radiometric reading 辐射测量读数radiometric system 辐射测量系统radiometric unit 辐射度单位radiometry 辐射度学，辐射测量[法]radiophoto 无线电照片传真radiophotography 无线电传真术radiophotoluminescence 辐射光致发光radiophotostimulation 辐射光刺激radioscope 放射镜radiosonde 无线电采空仪radiospectroscopy 辐射光谱学radiotelemetric 无线电遥测的radiotheraphyh 放射线疗法radiothermoluminescence 辐射热致发光radius gauge 半径（量）规radius of curvature 曲率半径radius of gyration 旋转半径radius tool 半径工具（曲模）radius vector 向量径radius (复数:radii)半径radix （复数：radices）基数radlux 辐射勒克司radome 天线罩rail 轨（条）rain return 雨水反射raised bell jar 升降钟罩raised face 凸面rake 倾斜（度）ralt cake glass 硫酸盐玻璃ram airbreathing laser 速压吸气式激光器raman diffusion 喇曼散射raman effect 喇曼效应raman laser 喇曼激光器raman liquid laser 喇曼液体激光器raman mixing 喇曼混频raman pumping 喇曼抽运raman scattering laser radar 喇曼散射激光雷达raman shift laser 喇曼频移激光器raman shifting 喇曼频移raman spectrophotometer 喇曼分光光度计raman spectroscopy 喇曼光谱学raman spectrum 喇曼光谱raman transition 喇曼跃迁raman-nath diffraction 喇曼乃斯衍射raman-scattering 喇曼散射raman-stokes generation 喇曼-斯托克斯振荡raman-type scattering 喇曼式散射ramp（1） 发射装置（2）倾斜装置ramsauer effect 冉邵尔效应ramsauer's circle 冉斯登图ramsauer's disk (disc)冉斯登班ramsden's eyepiece 冉斯登目镜ramsey fringe 冉赛条纹random（1） 随机（2）无视random access 随机存取random colo[u]r 任意色random diffuser 无规漫射体random emission 无规发射random error 随机误差random event 随机事件random function 随机函数random interval 随机区间random moire fringe 无规模阿干涉条纹random noise 无规噪声random optical access 随机光信息存取random path fluctuation 无规光路起伏random phase 随机相位random phase shift 随机相移random process 随机过程random sampling 随机抽样random scattering 无规散射random special phase modulation 无规空间相位调制random variable 随机变量random-access memory 随机存取储存random-access time 随机存取时间random-walk 无规则运动randomization 随机化randomizing effect 随机效应randomly fluctuating plasmas 无规起伏等离子体randomly medium 无规媒质randomly spaced phased array 无规间距相控阵randomness (1)无规性(2)随机性rang-finding lidar systems 距离测定用雷射雷达range (1)范围，区域(2)量程(3)距离range accuracy 测距精度，距离精度range adjustment 量程调整range amplifier 测距放大器range compensator 距离补偿器range finder 测距仪range gated detection 距离选通探测range instrumentation 测距仪range laser radar 激光测距雷达range of exposure (1)曝露范围(2)曝光范围range of ocular accommodation 目镜调节范围range of response (1)视场（光学仪器）(2)响应范围range of telescope 望远镜视场range of video 视频范围range of visibility 视距，能见距离range of vision 视野，视界range resolution 距离分辨率range scope 距离指示器range-finder camera 测距照相机range-finder scope 测距仪瞄准镜range-finder window 测距窗range-finding 测距range-gated imaging technique 距离选通成像技术range-gated laser 距离选通激光器range-to-go 到目标的距离rangefinders 测距仪rangepole 标杆ranger 测距仪ranging 测距ranging laser 测距离激光器ranging theodolite 测距径纬仪ranging unit 测距计rank (1)列，排(2)等级(3)顺序ranked data 分级资料，分级数据rankin temperature scale 阑金温标（用华氏度数表示的绝对温标）rapid inversion method 快速反转法rapid lens (1)快速透镜(2)大孔径物镜rapid neutron 快速中子rapid orientation 快速定向rapid rectilinear lens (1)快速消畸变镜头(2)快速直线透镜rapid shutter 快速快门rapid-access storage 快速[存取]存储[器]rapid-decay phosphor 短余辉磷光体，快速衰减磷光体rapid-scan spectrometer 快速扫描分光计rare earth element 稀土元素rare earth liquid laser 稀土元素液体激光器rare earth materials 稀土族材料rare earth oxide 稀土氧化物rare earths 稀土rare gas 稀有气体rare gas eximer 稀有气体激光元rare gas laser 稀有气体激光器rare-earth glass 稀土玻璃rare-earth ion 稀土离子rare-earth ion-doped nonlinear crystal 掺稀土离子非线性晶体rare-earth laser 稀土元素激光器rare-earth-doped calcium fluoride 掺稀土氟化钙rare-earth-doped crystal 掺稀土晶体rarefied gas 稀薄气体raster (1)网路(2)光栅（电视）raster grating 网路光栅raster line 网线raster microscope 网格显微镜raster pattern 光栅图样raster-scanned image 光栅扫描图像rat's nest type bolometer 鼠巢式测辐射热计ratchet pawl 棘轮爪ratchet wheel 棘轮ratch[et] (1)棘轮，棘轮机构(2)棘爪rate (1)速率(2)速度rate equation 速率方程rate of incidence 入射率rate of scanning 扫描频率rate of turn gyroscope 回转仪转动速率，陀螺仪转动速率rate-dependent character of corrosion [玻璃]腐蚀速度特性rated power 额定功率rated value 额定值ratemeter 速率计rating (1)额定值(2)分等ratio (1)比，比率(2)比例(3)系数ratio of speed 速比ratiomethod of fourier spectrometry 傅里叶光谱测量比例法rational system of units 有理单位制rationalization 有理化rationalized unit 合理单位raw (1)原始的(2)未加工的raw data 原始数据raw film 原胶片raw glass 毛坯玻璃raw material 原料ray (1)光线(2)射线ray aberration 光行差ray curvature 射线曲率ray envelop 光束包络，射线包迹ray filter 滤光镜ray of light 光线ray plot 光线[行程]图ray plotter 光绚绘迹器ray trajectory 光线径迹ray velocity 光速rayleigh  (r)瑞利（光强度单位，等於106量子∕厘米2）rayleigh criterion for resolution 瑞利分辨率判据rayleigh cross-section 瑞利[散射]截面rayleigh disk 瑞利斑，瑞利盘rayleigh interferometer 瑞利干涉仪rayleigh limit 瑞利[分辨]极限rayleigh quarter-wave limit 瑞四分之一波长极限（瑞利准则）rayleigh quarter-wave tolerance 瑞利四分之一波长[光学]公差rayleigh resolution limit 瑞利分辨极限rayleigh scatter 瑞利散射器rayleigh spectrometer 瑞利分光计rayleigh wave 瑞利波rayleigh's law 瑞利定律rayleigh-jeans law 瑞利–吉恩斯定律rayleigh-ritz variational procedure 瑞利–里兹变分法rayleigh-sommerfeld formulation 瑞利–索末菲理论rayleigh-wing scattering 瑞利翼状散射raytracing device 光线跟踪装置re-centralizing 重定中心re-emission 再发射re-entering 次级射入（粒子由於散射而进入计数器）re-lighting 再次起动，重复起动reactance 电抭reactant (1)反应物(2)反应体(3)反应剂reaction (1)反作用(2)反应reaction force 反作用力reaction principle 反作用原理reaction thrust 反推力reactivation 再激活reactive element 电抗元件reactive power 无功功率reactive sputtering 往复溅射reactivity 反应性reactor (1)反应堆(2)电抗器(3)反应器read head 读[出]头read only memory  (rom)只读存储器，唯读存储器read write memory 读写存储器read-out system 读出系统read-out time 读出时间readability 读出能力reader for microfilm 缩微胶片阅读器reader light 读出器指示灯reading 读数，示数reading accuracy 读出精度reading brush 读孔刷reading certainty 读数确定度reading circuit 读出电路reading device 示读装置，读数装置reading error 读数误差reading glass 阅读放大镜，读数放大镜reading microscope 读数显微镜reading optical beam 读出光束reading telescope 读数望远镜reading value per division of dial disk 刻度盘每格读数值reading value per division of vernier 游标每格读数值reading wand 读数杆readjustment 重[新]调[整]，重校readout 读出readout signal flow 读出信号流readr (1)读出器(2)读数器reagent (1)试剂(2)反应物reagent grade 试剂等级reaging 反复老化real 实的，真实的real aperture 实际孔径，有效孔径real axis 实轴real brightness 真亮度real component 实份量real field 实场real focus 实焦点real gas 真实气体real image 实像real imaginary hologram pair 虚实全息图对real number 实数real object 实物real quantity 实数real space 实物空间，物方real time interferometer 实时干涉仪real time visual reconstruction 实时视觉再现real transition 实跃迁real-time 实时real-time coding 实时编码real-time control system 实时控制系统real-time correction 实时校正real-time doppler imaging system 实时多普勒成像系统real-time extrapolation 实时外推法real-time filter 实时波器real-time fringe 实时条纹real-time grey level display 实时灰阶显示real-time hologram 实时全息图real-time holography 实时全息术real-time interferometry 实时干涉量度学real-time laser link 实时激光线路real-time linear detection system 实时线性谱观察real-time operation 实时工作real-time optical correlation 实时光学相关real-time optical singnal processor 实时光学信号处理器real-time output 实时输出信号real-time photography 实时摄影术real-time recording 实时记录real-time spectrum analyzer 实时频谱分析器real-valued intensity 实数值场强度reality 真实性realizability 现实性，可实现性realm 领域，范围realuminizing 再镀铝reamer (1)铰刀(2)铰床reaming 铰孔rear (1)後部，背面(2)後面的，背面的rear finder (1)後部描准器(2)後部指示器rear focus 後焦点rear nodal point 後节点rear node 後节点rear operating aperture 後工作孔径rear view 後视图rear-silvered mirror 背面镀银反射镜rear-vision mirror 後视镜reasonable value 合理值reassembly 重装配rebatron 大功率电子聚束器rebound 跳回，弹回recalescence point 复辉点recalibration 重校[准]recasting 重铸receiver 光接收器receiver ,rx 光接收器receiving aperture 接收孔径receiving objective 接收物镜receiving optics 接收光学系统receiving set 接收机，接收器receiving station 接收站receptacle (1)容器(2)插座，插孔receptacles 插座receptance 敏感性receptor 接收器recess (1)槽，环槽，凹槽(2)切口，凹口recessing 开[凹]槽recipient 信息接收器reciprocal (1)倒易的(2)倒数reciprocal dispersive power 色散率倒数reciprocal ellipsoid 倒易椭球reciprocal equation 倒易方程reciprocal lattice 倒易点阵reciprocal leveling 对向水准测量reciprocal lifetime 寿命倒数reciprocal transducer 倒易换能器reciprocal translation theorem 相互转换定理reciprocal value 倒数值reciprocating movement 往复运动reciprocation 往复，往返reciprocity 倒易性，可逆性reciprocity failure 倒易性失效reciprocity law 倒易律recloser (1)自动开关(2)复合继电器(3)自动复充电装置recognizer 识别器，识别机recoil 反冲，跳回recoil effect 反冲效应recoil electron 反冲电子recoil energy 反冲能量recoil impulse 反冲脉冲recoil shift 反冲漂移recollimation 再准直recombination (1)复合(2)再化合recombination center 复合中心recombination coefficient 复合系数recombination laser 复合激光器recombination lifetime 复合寿命recombination radiation 复合辐射recombination rate 复合率recombination region 复合范围，复合区域recombination time 复合时间recombiner (1)复合器(2)复合剂recon device 侦察装置reconfigurable 重新组态reconnaissance camera 侦察照相机reconnaissance device 侦察仪器reconnaissance equipment 侦察设备reconstructed image 重现象reconstructing hologram 再现全息图reconstructing wave 再现波reconstruction beam 再现光束record (1)记录(2)录声(3)录象record chart 记录卡，记录[图]表record circuit 记录电路recordability 可记录性recorder (1)记录器(2)录声机recorder deflection 记录器偏转recorder scan 记录器扫描recorder-pen 记录笔recording camera 录像机recording colorimeter 记录式色度计recording equipment 记录设备（录声设备和录影设备）recording infrared spectrophotometer 记录式红外分光光度计recording infrared tracking instrument 红外跟踪记录仪recording instrument 记录仪recording lamp 记录灯recording medium 记录媒质recording optical tracking instrument 记录式光学跟踪仪recording phase hologram 记录相位全息图recovery 复元recovery of spectrum 谱复原recovery photodiode 复元光电二极管recovery time 恢复时间recruitment services and executive search 人力服务recrystalization 再结晶rectangle 长方形，矩形rectangle function 矩形函数rectangular (1)长方形的，矩形的(2)直角的rectangular aperture 矩形孔径rectangular axis 直交轴rectangular cartesian coordinate 直角笛卡儿坐标rectangular coordinate 直角坐标rectangular coordinate system 直角坐标系rectangular disk laser 矩形盘状激光器rectangular filter 矩形滤波器rectangular guideway 长方形形导轨，矩形导轨rectangular hyperbola 直角双曲线rectangular laser 矩形激光器rectangular mirror 矩形反射镜rectangular prism 直角棱镜rectangular wave 矩形波rectangular wave grating 矩形波光栅rectification (1)整流(2)检波(3)矫正(4)精馏rectifier (1)整流器(2)纠正仪(3)精馏器rectifier lens 整流透镜rectifier photo-cell 整流光电管rectifying (1)整流(2)精馏rectifying device 整流装置rectilinear 直线的rectilinear lens (1)消畸变镜头(2)直线透镜rectilinear motion 直线运动rectilinear propagation 直线传播rectilinear scale 直尺rectilinear scanner [直]线性扫描器rectilinearity 直线性rectoscope 直肠镜recurrence rate 重复率recurrent waveform 再现波形recurring decimal 循环小数recursion 循环，递推recycling 反复循环recycling spectrometer 再循环光谱仪recycling time 重复时间red end 红端（光谱）red light 红光red light laser 红光激光器red limit 红光极限（可见光）red [colo[u]r] (1)红色，赤色(2)红色的red-sensitive 红敏的red-sensitive cell 红敏光电管redder source 较赤热光源reduced (1)减缩的(2)约化，简化的reduced admittance 约化导纳reduced coordinate 约化坐标reduced data record 简缩数据记录，约化数据记录reduced eye lens 简化目镜reduced frequency 约化频率reduced image 缩小像reduced optical length 折合光程reduced pressure 减压reduced scale 缩小比例尺reduced spatial frequency 约化空间频率reduced vergence 折合聚散度reducer (1)减速器(2)减压器(3)还原剂(4)缩小仪reducible matrix 可约矩阵reducing lens 简化镜头reducing plane table 简化平板仪reducing printer 缩印仪reducing reflection coating 减反射膜reducing solution 还原溶液reducting theodolite 简化经纬仪reduction formula 换算公式reduction lens 缩影镜头reduction of operation 换算reduction printer 缩印机reduction rate 减速率reduction ratio 减速比reduncancy check 冗余校验redundancy  (redundance)(1)冗余，多余(2)剩余redundant bit 冗余位redundant information 冗余信息redundant number 冗余数redundant operation 冗余运算reed 舌簧，舌片reed-type comparator 振簧式比较仪reek [block] 雾块（一种划痕）reel (1)卷轴，卷筒(2)磁片盘(3)绕线管reentrant (1)凹腔的(2)凹角的(3)重入的reentrant acousto-optic light modulator 凹腔声–光光调制器reentrant angle 重入角reentrant deflecter 凹腔偏转器refacer 光面器refacing 光面refection reducing coating 增透透膜（防反射膜）refection-enhancing coating 增反射涂层reference (1)参考，参照(2)基准，标准reference angle 参考角reference area 参考面积reference axis 参考轴reference beam 参考光束reference circuit 参考电路reference colo[u]r 标准色reference direction 参考方向reference disk 校对盘，标准圆盘量规reference ga[u]ge 校对测规，校对量规(2)校对计reference generator 参考信号发生器reference level (1)参考级(2)参考电平reference light 参考光reference line 参考线reference mark 参考标记reference phase 参考相位reference point 参考点reference point source 参考点光源reference scale 参考尺reference standard 参考标准reference surface 参考面，基准面reference system 参考系reference voltage 基准电压reference wave 参考波referenced line of sight 基准瞄视线refining 精炼，捉纯refinish 再抛光reflectance 反射比reflectance coating 反射涂层reflectance grating 反射光栅reflectance spectrometry 反射光谱学reflectance-increasing film 增反射膜reflectant lighting metering 反射光测法reflected glare 反射眩光reflected illumination 反射照明reflected light microscope 反射光显微镜reflected radiation 反射辐射reflected ray 反射线reflected wave 反射波reflecting action 反射作用reflecting anamorph 反射变像系统reflecting anamorphotic optical system 反射变像光学系统reflecting camera 反射式照相机reflecting collimator 反射式准直仪reflecting dichroic mirror 反射分色镜reflecting element 反射器，反射元件reflecting elements in series 串联反射元件reflecting film 反射膜reflecting finder 反射取景器reflecting galvanometer 反射电流计reflecting goniometer 反射测角计reflecting layer 反射层reflecting medium 反射媒质reflecting microscope 反射显微镜reflecting mirror 反射镜reflecting objective 反射物镜reflecting optics (1)反射光学(2)反射镜片reflecting plane 反射[平]面reflecting power (1)反射本领(2)反射比reflecting prism 反射棱镜reflecting screen 反射屏reflecting sphere 反射球面reflecting square 反光直角器，反光直角块reflecting surface 反射面reflecting telescope 反射望远镜reflecting telescopes 反射望远镜reflection (1)反射(2)反射波(3)反映reflection "image" 反射"像"reflection coefficent 反射系数reflection curve 反射曲线reflection density 反射密度reflection echelon grating 反射阶梯光栅reflection factor 反射因数reflection filter 反射滤光片reflection gauge 反射测量计reflection grating 反射光栅reflection hologram 反射全息图reflection interferometer 反射干涉仪reflection kernel 反射[波]中心reflection measurement 反射测定[法]reflection mirror 反光镜reflection objective 反射物镜reflection plane 反射平面reflection power 反射率reflection shield 反射屏reflection thickness ga[u]ge 反射厚度计