parfocal distance是什么意思

网络释义

用法例句

A novel range alignment algorithm for ISAR;

一种新的ISAR距离对齐算法

Conventional range alignment algorithms cannot guarantee high accuracy and efficiency at the same time.

距离对齐是ISAR成像的关键技术之一。

Range focusing is imposed to SAR raw data,which makes it have comparative high relativity,then a vector linear prediction is performed along the azimuth direction,and block adaptive quantization is used to the prediction error series.

该文提出一种新算法,先对SAR原始数据作距离聚焦处理,使其在方位向具有较强的相关性,再沿方位向作矢量线性预测,并对预测残差序列作分块自适应量化。

Analysis on the Range Focusing Depth of Translational Invariant Bistatic SAR

平移不变模式双基地SAR距离聚焦深度分析

Focus-to-film distance(f.f.d)

焦点-胶片距离(焦距)

autofocus zoom lens

自动聚焦变焦距镜头

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。

back focal distance

【光】后焦距﹝指镜头与菲林间的距离﹞

The flatter the ellipse, the farther apart are the foci, and the farther each focus is from the center .

椭圆越扁平，两焦点之间的距离越远，每个焦点离中心的距离也越远。

horizon focussing

水平聚焦 -电离层的

macro teleconverter

增距式微距附加镜﹝使标准镜头变成微距而保留最近封焦距离﹞

Discussion about Off-Focus Influence on MTF for Long Focus Aerial Camera

长焦距航天遥感相机离焦对传递函数的影响

Research in the Algorithms of Depth from Defocusing Based on Image Processing;

基于图像处理的离焦测距算法的研究

Having three focal lengths.

三焦距的有三个焦距的

equivalent focal length

当量焦距，等效焦距

Study on Digital Image Auto-focusing and Restoration Technology of the Defocused Image

数字图像自动聚焦与离焦模糊复原技术研究

Design, Fabrication and Self-focusing Properties of Varied Line-space Grating

自聚焦变栅距光栅设计、制作及特性研究

They have a focal length, and where an image is formed depends on a combination of the focal length and the distance between the object and the lens.

透镜有焦距，而影像形成的位置，取决于焦距及物体与透镜距离的组合。

We say that a caustic is formed on the surface of the sphere at this distance.

我们说，在这一距离的球面上形成了焦散。

The Effect of Learners' Perception of Language Distance on Foreign Language Anxiety

学习者语言距离的感知对外语学习焦虑的影响

mather's plasma focus apparatus

马瑟型等离子体聚焦装置