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The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍了二级光谱的理,给出了波差法设计复消色差物的方程

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A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近眼的理疗器,它有作为物的凸筒、目,还有头套和,它用于人们在近距离上长时间用眼时戴在眼上,可以使被物的像清楚、放大和变远。

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Crash Course Physics 速成

The objective lens takes incoming light rays from a distant source. .

镜从远处接收入射光线。

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Crash Course 合篇

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

工作原是这样镜从远处接收入射光线。

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Crash Course Physics 速成

The objective lens then converges the light rays to form a real, flipped image inside the telescope.

然后镜会聚 光线,在望远镜内部形成一个真实翻转图像。

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After all of the like terms cancel out, you’re left with a magnification equation in terms of the focal lengths of the objective lens and the eyepiece.

在抵消所有类似项后,您将得到一个关于镜和目镜焦大方程。

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Crash Course Physics 速成

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.

伽利略目镜使用凹透镜,而标准折射望远镜镜和目镜都使用凸透镜。

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Crash Course Physics 速成

After all of the like terms cancel out, you're left with a magnification equation in terms of the focal lengths of the objective lens and the eyepiece. .

在所有类似项抵消之后,就镜和目镜而言,您会得到 一个大倍率方程。

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Crash Course Physics 速成

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。 体被置 在镜焦点之外,因此光线再次 在另一侧形成翻转实像。

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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.

原对角是肉眼对角——镜中心与实像高度夹角。

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Crash Course Physics 速成

It consisted of an objective lens on the end closest to the object and an eyepiece at the other end, which magnified the image produced by the objective lens.

它由最靠近体一端镜和另一端目镜组成,它大了镜产生图像。

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Crash Course Physics 速成

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 第一个角度切线 theta 是真实图像 在镜焦高度。

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Crash Course 合篇

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,如哈勃太空望远镜, 都是反射望远镜, 使用镜子作为镜, 这样它们就可以有巨大开口,吸收尽可能多光线, 以便最好地捕捉远处图像。

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