focal length
英 [ˌfəʊkl ˈleŋθ]
美 [ˌfoʊkl ˈleŋθ]
n. 焦距
牛津词典
noun
- 焦距
the distance between the centre of a mirror or a lens and its focus
双语例句
- Because it is this small, its focal length is only 18 metres.
因为它体积偏小，所以它的聚焦只有18米。 - Polaroid cameras have a fixed focal length.
偏光照相机有固定的焦距。 - The focal length is set to Flat stitch in the Properties window.
焦距在特性窗囗中被设定成平坦的一针。 - Focal length: The distance between the centre of a lens and its principal focus.
焦距：镜头中心与其主焦点的距离。 - The intrinsic parameters are separated into two parts of focal length and coordinates for the principle point, which are then solved by using the least square method.
然后把摄像机内参数矩阵分解为有效焦距与主点位置两部分，并利用最小二乘法分别对其进行求解。 - An image processing system computes the size of the reticle image and the focal length.
图像处理系统将计算十字线的像的尺寸和焦距。 - Focus: plane of focus; focal length; and depth of field.
焦距：焦点平面，焦距和景深。 - Graphic analysis of plane parallel resonator and measure of the thermal focal length
平行平面激光谐振腔图解分析及热焦距的测量 - Focal length is generally measured in millimeters.
焦距通常是用毫米来测量。 - It can be used to really evaluate the optical performance and imaging characters at any focal length of a zoom system.
可借助该程序对变焦系统任意焦距位置的光学性能和像差特性进行实时评估。 - FLIR – The large aperture enables a longer focal length, which provides higher resolution without losing sensitivity.
大孔径允许更长的焦距，从而在不损失灵敏度的情况下，提供更高的分辨率。 - This method can correct the measurement of the thickness lens focal length lens produced by ignoring the error.
此方法可以修正测量透镜焦距忽略透镜厚度所产生的误差。 - The focal length of the camera lens plays an important role in photo criteria.
摄影机镜头的焦距在摄影规范中起着重要的作用。 - Optic Design of Collimator with Large Aperture and Long Focal Length
大口径长焦距平行光管光学系统设计 - Research on Focal Depth in the Experiment of Thin Lens 'Focal Length Measurement
薄透镜焦距测量实验中焦深问题的研究 - We can therefore solve the problem by using different focal length in the process of tracking measurement.
如果能在跟踪测量过程中改用不同的焦距就能解决此问题。 - The kit lens offers automatic lens aberration compensation, three independent control rings, and a focal length of8-128mm.
该套件镜头提供了自动镜头像差补偿，三个独立的控制环，且焦距8-一百二十八毫米。 - This thesis analyses the design and simulation of micro optical lens system having a fixed focal length, improving on it, making with simulation and design preferable.
本文首先介绍了微型光学镜头的发展状况，分析了光学镜头与影像感测元件之间的匹配问题，并对定焦镜头的技术参数以及发展历程作了详细的介绍。 - The relation between the focal length of a concave lens and its reflective image properties is analysed and deduced.
本文分析推导了透镜的凹面反射成像与凹透镜焦距的关系，介绍了利用此关系较方便地测量凹透镜焦距的方法。 - In high-precision size measurement system, the traditional method using short-focus fixed focal length lens has large radial distortion that may affect the measurement accuracy.
在高精度尺寸测量系统中，采用传统短焦距定焦光学方法时径向畸变较大，影响测量精度。 - The adjustable focusing electrically controllable electroactive lens can adjust the focal length discretely or continuously.
该可调整焦距的、可电学控制的电激活透镜能够不连续地或连续地调整焦距。 - Measurement of optical surface and foci of long focal length lens by CGH
计算全息法测量长焦透镜面形和焦距 - If the background is appealing, then use short focal length lens to include it in the image.
如果背景很吸引人，那么使用短焦距镜头把它包括进去。 - A Method for Measuring Thermal Lens Focal Length of End-Pumped Nd: GdVO_4 Crystals
一种测量端面抽运Nd-GdVO4晶体热透镜焦距的方法 - ( physiology) the automatic adjustment in focal length of the lens of the eye.
（生理学）用眼的透镜来自动调节焦距。 - Based on that the laser rod is equivalent to gradient index rod ( GRIN), a new thermal lens focal length expression was achieved.
把激光棒等效为梯度折射率棒，得到了新的热透镜焦距公式。 - The ratio of the focal length to the diameter of a ( camera) lens system.
相机镜头直径焦距比。 - The CCD observations on a telescope with a long focal length will be of great importance for this very close conjunction phenomenon.
届时，这种非常近的合天象的长焦距望远镜的CCD观测将具有重要意义。 - A photographic lens with a short focal length used to take pictures at short ranges.
带有短焦距在小范围内照相的照相机镜头。 - Variable focal length ( cylindrical) lens They consulted their stopwatches and paced off distances.
变焦（距）（圆柱）透镜他们查看秒表，步测距离。
英英释义
noun
- the distance from a lens to its focus
Synonym: focal distance