一般地说，区别较差相机与较好相机的一个性质指标时该相机能以多快的速度聚焦——在地反差的区域上能以多高的清晰度聚焦。
Generally, one quality that separates the better cameras from the lesser cameras is how quickly the camera can focus — and how well the camera can focus on areas of low contrast.
对于飞行速度每小时数千英里的目标进行激光束瞄准和聚焦并不容易，但机载激光器是唯一能够完成这项工作。
Pointing and focusing a laser beam on a target that is rocketing skyward at thousands of miles per hour is no easy task, but the Airborne laser is uniquely able to do the job.
为了提高DVD聚焦伺服系统的控制精度和响应速度需要加入控制器，提出了一种新的校正算法。
We need to add the controller in order to enhance the control precision and response speed of DVD focus servo system, and then a new emendation arithmetic was put forward.
对熔炼室真空度、聚焦、原料棒化学成分、尺寸规格、熔炼速度，搅拌速度等对单品制备的影响进行了详细分析。
Influences of vacuum in the melting chamber, chemical composition and specifications of Mo and Mo-Nb alloy feed stock bar growing rate, rotation rate on processing Mo-Nb alloy are analyzed in detail.
该算法能够减少爬山步数，可提高自动聚焦速度。
The algorithm reduces mountain climbing steps, and enhances auto-focus speed.
仿真实验表明，这种粗精相结合的检调焦方法既能保证聚焦精度，又能提高聚焦速度。
The simulation results have shown that this method which combines rough and fine focus adjustment can ensure the focusing accuracy while improving the focusing speed.
本文根据近轴子午光线方程，研究了自聚焦透镜光纤加速度计的工作原理；
Based on paraxial meridian-ray equation, the principle of fibre accelerometer using self-focussing lens is studied;
分析了单透镜色差和群速度色散对超短脉冲高斯光束聚焦的时间分布及脉冲波面的影响 ；
The influence of lens dispersion up to second order on the spatial and temporal intensity distribution of the femtosecond Gaussian beam was analyzed.
分析了单透镜色差和群速度色散对超短脉冲高斯光束聚焦的时间分布及脉冲波面的影响 ；
The influence of lens dispersion up to second order on the spatial and temporal intensity distribution of the femtosecond Gaussian beam was analyzed.
应用推荐