In optical astronomy, using a telescope and observing the stars that way, we rely on visible light waves.
在光学天文学中，在用望远镜观察恒星时，我们依靠的是可见光波。
This approach leads to large, heavy and complex optical assemblies and a higher manufacturing cost for specialized optics.
这种方法导致了光学组件变得更大、更重而且趋于复杂化，光学制造成本较高。
A sensor channels the light signal along an optical fibre.
传感器沿光导纤维输送光信号。
Bille and his team work with an optical instrument called an active mirror—a device used in astronomical telescopes to spot newly emerging stars and far distant galaxies.
比尔和他的团队使用一种被称为“活动镜”的光学仪器，这是一种在天文望远镜的种类中用来发现新出现的恒星和遥远星系的仪器。
A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color.
一家公司计划开发一种原型除草机，它使用带有光学传感器和微处理器的刀片，通过颜色的深浅区别杂草和作物。
To measure the difference in elevation between poles, surveyors used an optical level—a telescope on a level base—placed halfway between the poles.
为了测量两极之间的高程差，测量员在两极中间的一个水平基座上使用了光学水准望远镜。
An anthelion is a rare optical phenomenon.
幻日是一种罕见的光学现象。
We derived a set of mathematical formulas for describing the third-order nonlinear optical process in polydiacetylene crystals.
我们建立了一套描述聚丁二炔晶体中的三阶非线性光学过程的数学公式。
How can the law accommodate a further output signal, a photon or optical signal?
这定律如何适应进一步输出信号，光子或光信号？
The model depicts aerosol optical thickness, a measure of the amount of light that the aerosols scatter and absorb, and a proxy for the number of particles in the air.
这个模型描述了气溶胶的光学厚度（一个衡量光在气溶胶里分散和吸收的物理量）以及气溶胶代替空气分子的程度。
Last month, we discovered a bright gamma-ray flare from the direction of this star while it was undergoing a huge optical outburst.
在上个月这颗亮星经历一次大规模光学爆发的时候，我们在它所在的方向上发现了一次伽马射线爆发。
But unlike the usual point and shoot pocket cams, the Sanyo boasts some serious specs, including a 3x optical zoom lens.
但是不像其他的袖珍(口袋型)摄像机，这款三洋相机拥有3倍的光学变焦镜头。
While there is no optical zoom, a 4x digital zoom is standard. Electronic image stabilization also helps correct the traditionally shaky video common to pocket cameras.
不过这款口袋摄像机不具备光学变焦功能，只支持4倍数码变焦。另外产品还内置了电子防抖功能。
Dust is nowhere near as hot as a star, therefore optical telescopes cannot observe it.
尘埃温度远不及恒星，所以光学望远镜难以观测到。
A real optical frequency comb spans the entire visible spectrum of light, and has very fine, evenly spaced teeth.
实际光学频率梳横跨整个可见光谱，各齿极细并均匀分布。
Waveguides are ridges on the surface of a chip that can direct optical signals; polysilicon is a type of silicon that consists of tiny, distinct crystals of silicon clumped together.
波导是芯片表面上的脊，可以控制光信号；多晶硅是硅的一种形态，由许多微小的、不同的晶体硅簇在一起。
Data from each telescope will be streamed across the globe through high-speed optical networks to a purpose-built supercomputer at JIVE in the Netherlands.
每个望远镜的观测数据通过高速光纤网络传输至一个专门的超级计算机中——该计算机位于荷兰的JIVE。
A typical optical telescope might have a diameter a few million times the wavelength of the light it is collecting.
一个典型的光学望远镜或许有一个可以收集几百万倍光波的直径。
Pascal Cotte said da Vinci built the painting up in layers, the last being a special glaze whose optical properties increased the illusion of a three-dimensional face.
帕斯卡尔·柯特称，达芬奇在绘制这张画时使用了多层颜料，最表面的一层使用了一种特殊釉料，这种颜料的光学性能可增加人物面部的三维效果。
As for buttons, there is a shutter release, a slider for an 8x optical zoom and a power button.
机身按钮包括一个快门键、一个8倍光学变焦滑钮和一个电源键。
Electronic viewfinders cannot match the clarity of a good optical finder.
电子取景器清晰度还无法和光学取景器相比。
In tribute to Hubble's longest-running optical camera, a planetary nebula has been imaged as WFPC2's final "pretty picture."
这个行星状星云的照片被看成是WFPC2最后的“漂亮图片”，以向这个哈勃历史最悠久的光学相机表示敬意。
The photographer must know how to minimize the inherent optical distortion of a very wide Angle lens.
摄影师必须知道如何使很宽的广角镜头固有的光学畸变最小化。
"It looked like a cool optical material," he said.
“它看上去就像是某种很酷的光学材料，”他说。
The combination of this unusual X-ray and optical emission makes this a remarkable object.
这一不寻常的X射线和光发射的组合使它成为一个显著的对象。
The transistor laser adds a third port for optical output, emitting light.
晶体管激光增加了光输出，发光的第三个端口。
The Heart Nebula, officially dubbed IC 1805 and visible in the above right, has a shape in optical light reminiscent of a classical heart symbol.
心脏星云，正式名称为IC 1805，在上图右边可见，在可见光波段有着让人联想到经典的心脏符号的形状。
The Heart Nebula, officially dubbed IC 1805 and visible in the above right, has a shape in optical light reminiscent of a classical heart symbol.
心脏星云，正式名称为IC 1805，在上图右边可见，在可见光波段有着让人联想到经典的心脏符号的形状。
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