In this research, the micro optical pick-up head is composed of a micro optical bench and a focusing lens mounted on a two-axis actuator. The study of focusing lenses is the major topic in this thesis.
在本研究中，微光学读取头是由微光学平台及固定在双轴致动器的聚焦透镜所组成的，其中的聚焦透镜正是本论文研究的主要方向。
A lens system consisting of two or more lenses on the same axis.
在一个轴上有两个或更多的镜头的镜头系统。
Applying B ultrasonic scan to survey the eye axis length is consistent with A ultrasonic scan, and it can better service launching cataract extraction and intraocular lens implantation.
应用B超测量眼轴长度与A超有很好的一致性，能较好地为开展白内障摘除IOL植入术服务。
These are joined on an optical axis, each with its own lens, filters, and reflectors.
两套系统连接在一个光学轴上，具有各自的透镜、滤光器、以及反射镜。
For precision positioning stage the multi-DOF measurement procedure based on machine vision and plane normal grating is, using parallel light to irradiate plane normal grating attached on positioning stage to generate projection, amplifying this projection by object lens, and imaging on CCD, then transmitting the image to computer by frame grabber, processing image to completes five DOF (including motion in XY plane, rotation around Z axis, tilting by Y axis and pitching by X axis) measurement.
基于机器视觉和平面正交光栅的精密定位工作台多自由度测量过程，是利用平行光照射贴于工作台的平面正交光栅产生投影，此投影经显微物镜放大，成像于CCD的光敏感面上，然后通过图像采集卡将图像数据传输到计算机进行相关处理，从而实现精密定位工作台的五自由度（XY平面内的移动、绕Z轴的转动、绕Y轴的倾斜和绕X轴的俯仰运动）测量。
This will look like a frosty or degrading sharpness at the edge of field where the light is defused off axis to the correction of the lens or mirror resulting in poor performance.
边缘弯曲就是镜面或者镜头不再一个水平的平面上，边缘有卷曲的现象，换句话说，边缘不像刀口那样锋利，因此导致边缘的画面不清晰从而影响画质。
The Fresnel lens in the optical receptor spotlights the headlamp beams to form their image at the 1-meter distance between the optical receptor and headlamps. CMOS camera as an image sensor, takes the photos of their images, which are captured by VG-M201, The application of some digital image processing techniques to these images, such as edge-picking up、least-square fitting-curve algorithm, is to calculate the offset position/angle of optical axis of the high beams and the nodical offset of the unsymmetrical facular light and shade cut-off line of the low beams.
系统的图像采集工作是利用受光箱中的菲涅耳透镜在1米的测量距离上聚合前照灯灯光，由CMOS摄像头作为图像传感器件，照入灯光远光光斑和非对称近光图像，由嵌入式处理器对捕获的图像运用边缘提取、最小二乘法拟合曲线等数字图像处理技术计算出远光主光轴偏移角度以及非对称近光光斑明暗截止线拐点的偏移，实现了前照灯近光非对称光斑的自动测量。
An external-cavity semiconductor laser was built by using a semiconductor laser, collimating cylindrical column lens for fast axis beam and a volume Bragg grating as a feedback element to get semiconductor lasers wavelength locked to the Bragg wavelength of the VBG.
用体布拉格光栅作为反馈元件与瓦级半导体激光器以及快轴准直柱透镜构成一个可以将半导体激光器的工作波长稳定在体布拉格光栅布拉格波长处的外腔激光器。
In the design of imaging system, ultra-thin projection lens was designed to be off-axis form.
在成像系统设计中，本文采用离轴式方法设计超薄投影镜头。
The numerical results from the designed doublet show that the intensity of the main disk is 57.14 times as much as that of the secondary disk, and 2.25 times as much as that of the main disk produced by only using a single lens. And the radius of the main disk is 0.49 times as much as that of a single lens. Though the intensity rate of the main disk and the secondary disk along the optical axis is basically the same as that of a single lens, the depth of focus of the doublet is smaller than that of a single lens.
对於所设计的双胶合透镜，数值模拟表明，焦平面上主瓣的强度是第1旁瓣的57.14倍，是单一个透镜主瓣强度的2.25倍，而主瓣的半径则是单一个透镜的0.49倍；轴线方向上，主瓣与第1旁瓣的强度之比与单一个透镜的基本相同，但是双胶合透镜的焦深则比单一个透镜的小0.25倍。
The divergence angle in fast axis direction of high power diode arrays laser can be collimated within 5 mrad through the fiber lens, and up to 95% power can get across.
利用光纤柱透镜对半导体激光器阵列光束快轴进行准直可以实现出射光线发散角在5mrad以内，透过率高达95％，并与现在商用的利用平凸柱透镜对快轴光束准直进行了详细的比较分析。
Primary and high school students are undergoing fast physical development the visual axis hasn't jelled yet wearing contact lenses too early or too much could generate the side effects such as the hypoxia of cornea and the disturbance of physiological metabolism. It will cause secondary bacterial pneumonia if the lenses are not cleaned and sterilized completely. The maladjustment of lens labyrinth and cornea would also wear out the corneaexfoliate the endepidermis even can lead to the corneal ulceration and perforation.
中小学生正处在生长发育旺盛时期，眼球视轴尚未定形，若过早或较长时间连续配戴隐形眼镜易产生角膜缺氧和生理代谢障碍等副作用；镜片清洗消毒不严，则会继发感染；镜片曲径若与角膜不相适应，还会造成角膜磨损，上皮脱落，严峻者会导致角膜溃疡或穿孔。
A laser beam is incident on the aspheric side of a tested lens through a beam waist conversion lens and the beam reflected by the aspheric surface is received by CCD camera. The position of the aspheric lens is adjusted until the center of the beam waist doesn't move with the rotation of the tested aspheric lens. It shows that the symmetry axis of the aspheric surface is aligned with the rotation axis. Then the eccentricity of the sphere side of the tested lens is measured according to the principle of the spherical eccentric measurement.
激光管发出的光束经束腰变换透镜入射到被测透镜的非球面表面，由CCD摄像头接收非球面的反射激光光斑，CCD的光敏面位于反射激光光束的束腰位置；调整被测透镜位置，直到激光束腰中心位置不随被测非球面透镜的旋转而变化，这说明被测透镜的非球面对称轴与机械旋转轴重合；再利用球面偏心测量原理检测被测透镜球面一面的偏心量，即可以求得被测非球面透镜的光轴共轴度。
Results:The contact lens has a bigger aberration. When the incident pupil is 5mm, the value of aberration is about 8.5%～11.8%of back vertex power. The central point for measuring the back vertex power is measuring the position of real focus-minimum blur-spot, which is the section on the orientation of image going along light axis. It has large deviation to focus position of axial ray, the value is about 76%.
结果：接触镜基弧曲率半径小导致大球差，在入瞳为5mm时球差约为近轴后顶焦距的8.5%～11.8%；接触镜后顶焦距测量，实质是测量实际焦点位置——像方光轴截面弥散斑最小处，它与近轴光焦点位置偏差很大，离焦量约为76%。
The numerical results indicate that the collimating performances of two lens changed little as the increasing of the refractive index and this made it possible to choose the material of the lens in more field. Theoretically, the radiation angle of laser diode beams in the quick axis can be compressed under 0.1 mrad.
结果表明：这两种柱透镜的准直效率随折射率的变化不大，这在一定程度上提高了透镜材料选择的灵活性；并且理论上，共轴双半椭圆柱透镜可以将半导体激光光束快轴方向的发散角压缩到0.1 mrad量级。
Eye axis lens measurement with Aultrasonic scan by modified sound speed shows better clinical practicability in silicone oilfilled eyes than traditional manual counting method.
通过坐位测量并调整超声波在硅油中的传导速度，可准确测量硅油填充眼眼轴，较传统方法测算人工晶状体度数准确率更高。
In a thin spherical lens, not all rays from infinity--incident parallel to the optical axis--are united at one point.
在一个薄球面透镜，并不是所有的射线无限-突发事件平行光轴-是美国在1点。
It is speculated that these changes might reflect increases in lens tilt about a horizontal axis, caused by the combined effects of a slacker zonule and gravity.
由此推测这种改变可能反映了在晶体悬韧带和重力的双重作用下晶体横轴倾斜度的增加。
Stops faster than action moving toward or away from you. For actionmoving at a 45-degree angle to the lens axis, you can use a shutterspeed one stop slower. For example: If a person running toward you atmoderate speed can be stopped at 1/125 sec, you'll need a shutterspeed of 1/500 sec to stop the subject moving across the frame, and a
如果物体沿镜头的轴线运动你能够用(1/125)的快门捕抓下来，那么它垂直于镜头轴线的运动（从取景框的一边到另外一边的运动）能用比(1/125)高2档的快门(1/500)捕抓下来，如果物体沿镜头轴线成45度运动的话，只需要提高一档快门(1/250)就能捕抓下来。
Finally, we discuss the appraisal method and its application of super fiducial axis in assembly of lens.
论述了最佳基准轴评价方法以及在镜头装校定心中的应用。