The resolution depends in part on the size of the objective; in general the bigger the telescope objective, the better your resolution is.

解析度部分取决于接物镜的大小；一般来说，望远镜的物镜越大，解析率就越高。

The amount of light it collects depends on the area of the objective.

它收集的光的数量取决于物镜的面积。

Although there have been many improvements made over the centuries, most big modern telescopes at their heart are based on the Newtonian design, and in fact no large professional-grade telescopes made today have a lens as their objective.

尽管几个世纪以来已有了很多改进，但大多数大望远镜的核心都是基于牛顿的设计，事实上，在制造的大专业级望远镜都不使用透镜作为接物镜。

The projector lenses magnify what has already been magnified by the objective lens.

投影镜头放大了物镜已放大的图像。

Many, like the Hubble Space Telescope, are reflecting telescopes, using mirrors as the objective lens so that they can have huge openings, taking in as much light as possible in order to best capture images of distant objects.

许多，如哈勃空间望远镜， 都是反射式望远镜， 使用镜子作为物镜， 这样它们可以拥有巨大的开口，尽可能多地摄入光线， 以地捕捉遥远物体的图像。

When viewing a celestial object a great distance away, the distance between the two lenses would equal the focal length of the objective lens minus the focal length of the eyepiece.

当观察远处的天体时，两片透镜之间的距离等于物镜的焦距减去目镜的焦距。

The way you get magnification is that you just divide the focal length of the objective glass by that of the eyepiece, of the ocular.

获得放大倍数的方法是将物镜的焦距除以目镜的焦距。

While Galileo used a concave lens for his eyepiece, the standard refracting telescope uses a convex, converging lens for both the objective lens and the eyepiece.

伽利略的目镜使用凹透镜，而标准折射望远镜的物镜和目镜都使用凸透镜。

The original subtended angle is the subtended angle of the unaided eye – the angle between the center of the objective lens and the height of the real image.

原始张角是未使用辅助工具的眼睛的张角——即物镜中心与实像高度之间的角度。

And at the same time, people often put, especially if they were doing direct observation of the sunspots, they put colored lenses on top of the object glass.

同时，人们通常会在物镜上放置有色透镜，特别是当他们直接观察太阳黑子时。

The imprinted beam of electrons is then magnified 40 times using an objective lens and further magnified 50,000 times using a set of projector lenses.

然后，印制的电子束通过物镜放大40倍，再通过一套投影镜进一步放大50,000倍。

Galileo's telescope interested him greatly, and he even suggested an improved design using convex lenses for both the objective and the magnifying eyepiece.

伽利略的望远镜让他非常感兴趣，他还建议使用凸透镜来改进设计， 无论是物镜还是放大目镜。

And in a ray diagram, you can see that the tangent of the first angle, theta, is the height of the real image over the focal length of the objective lens.

在射线图中，您可以看到 第一个角度的切线 theta 是真实图像 在物镜焦距上的高度。

First, the objective lens, often considered the heart of the microscope.

首先，物镜，通常被认为是显微镜的心脏。

But the idea was that you would use a very large convex lens at the end, the object glass, not because That changes optical power, but because you're polishing only the very central part.

但想法是你会在末端使用一个非常大的凸透镜，即物镜， 不是因为这会改变光学功率，而是因为你只打磨中央部分。

A flatter, convex objective lens reduced chromatic aberration, gave a longer focal length and, for a fixed eyepiece, greater magnification.

一个更平坦的凸透物镜可以减少色差，提供更长的焦距， 并且对于固定的眼镜片来说，能获得更大的放大倍率。

Here’s how it works: The objective lens takes incoming light rays from a distant source.

工作原理如下：物镜摄取来自远处光源的入射光线。

The object is placed just beyond the focal point of the objective lens, so light rays again form a flipped real image on the other side.

多。 物体被放置 在物镜焦点之外，因此光线再次 在另一侧形成翻转的实像。

Every time the diameter of the objective lens is doubled, the light gathered increases by a factor of four, and objects of similar light output can be detected if they are twice as far away.

每次物镜的直径翻倍，收集到的光线就会增加四倍，同时也能探测到两倍远距离处具有相似光输出的物体。

The next lenses, the objective and a series of four projector lenses, are used to resolve and magnify the minuscule image imprinted into the electron beam, up to a width of a few centimeters.

接下来的镜头， 包括物镜和一系列四个投影镜头，用于解析并放大刻印在电子束上的微小图像，直到宽度达到几厘米。