圖形學 射線相交算法

陰極射線管 (Cathode Ray Tube)

Ferdinand Barun of Strasbourg developed the cathode ray tube in the year 1897. It used as an oscilloscope to view and measure some electrical signals. But several other technologies exist and solid state moving may eventually predominate. General a cathode ray tube is s special type of vacuum tube in which some images are produced. The images are generated when an electron beam strikes on the phosphorescent surface. Most of the old types of computer desktop and television display use the cathode ray tube. The CRT used in the computer display is like a picture tube in a television.

斯特拉斯堡的費迪南德·巴倫 ( Ferdinand Barun)于1897年開發(fā)了陰極射線管 。它用作示波器來查看和測量一些電信號。 但是存在其他幾種技術，固態(tài)移動最終可能會占主導地位。 通常，陰極射線管是一種特殊的真空管，在其中產生一些圖像。 當電子束撞擊磷光表面時會生成圖像。 大多數(shù)臺式計算機和電視顯示器的舊類型都使用陰極射線管。 計算機顯示器中使用的CRT就像電視機中的顯像管。

In the computer system, there are several modes of computer display or sets of specification on which the CRT operates. The most commonly used specification for CRT display is known as SVGA( super video graphics Array). the laptop uses the liquid crystal display. The technology used in the modern computers and the television of LCD are different.

在計算機系統(tǒng)中，CRT在其上運行幾種計算機顯示模式或一組規(guī)范。 CRT顯示最常用的規(guī)范是SVGA(超級視頻圖形陣列)。 筆記本電腦使用液晶顯示器。 現(xiàn)代計算機和LCD電視使用的技術不同。

陰極射線管的組成 (Components of cathode ray tube)

The cathode ray tube can be divided into the three sections:

陰極射線管可分為三個部分：

1. Electron Gun

1.電子槍

• The major role of this section is to produce electron at a very high velocity. The whole process is done by a process name thermionic emission.

  該部分的主要作用是以很高的速度產生電子。 整個過程由過程名稱“熱電子發(fā)射”完成。

• The filament present in the cathode tube is heated to a fixed point where the electrons become loose.

  陰極管中存在的燈絲被加熱到電子變松的固定點。

• An anode of the high speed is applied to it and the electrons move toward the screen due to electrostatic attraction.

  對其施加高速陽極，由于靜電吸引，電子向屏幕移動。

• The brightness of the image is controlled by the electron passes through a series of the control grid.

  圖像的亮度由電子通過一系列控制網(wǎng)格控制。

• If the grid is more negative then the image is darker or vice versa.

  如果網(wǎng)格更負，則圖像更暗，反之亦然。

2. Deflection system

2.偏轉系統(tǒng)

• The deflection system controls the images which are produced by controlling the position of the electron that hot the screen.

  偏轉系統(tǒng)控制通過控制加熱屏幕的電子的位置而產生的圖像。

• It consists of two perpendicular set of electric and magnetic fields and it control both the horizontal and vertical axes.

  它由兩組垂直的電場和磁場組成，并控制水平和垂直軸。

• When the voltage applied to the field is controlled then it is possible to vary deflection through electrostatic force or motor effect.

  當施加到磁場的電壓受到控制時，就有可能通過靜電力或電機效應來改變偏轉。

3. Fluorescent screen

3.熒光屏

• This screen display where the electrons are hitting the cathode ray tube.

  該屏幕顯示電子撞擊陰極射線管的位置。

• This screen is coated with a material that emits light when it struck by electrons.

  該屏幕涂有一層材料，當它被電子撞擊時會發(fā)光。

• The two commonly used materials are zinc sulfide or phosphorus.

  兩種常用材料是硫化鋅或磷。

陰極射線管的應用 (Application of cathode ray tube)

• The cathode ray tube is used to create a moving image.

  陰極射線管用于創(chuàng)建運動圖像。

• The CRT TV works by moving the electron beam scan the screen at a faster rate.

  CRT電視通過移動電子束以更快的速度掃描屏幕來工作。

• It is used in the cathode ray oscilloscope.

  它用于陰極射線示波器。

• It is used as a display device in radar.

  它用作雷達中的顯示設備。

• It is used in computer monitors and some television.

  它用于計算機監(jiān)視器和某些電視。

陰極射線管的優(yōu)點 (Advantages of cathode ray tube)

• It operates at any resolution and at an aspect ratio.

  它可以任何分辨率和高寬比運行。

• CRT runs at the highest pixel resolution.

  CRT以最高像素分辨率運行。

• Cathode ray tube produces a very dark black and the highest contrast level.

  陰極射線管產生非常暗的黑色和最高的對比度。

• CRT is best suited for rapidly moving or changing the image and have a fast response time.

  CRT最適合快速移動或更改圖像并具有快速響應時間。

• CRT is less expensive than any other display technology.

  CRT比其他任何顯示技術都便宜。

陰極射線管的缺點 (Disadvantages of cathode ray tube)

• It is relatively bright but not as LCD's brightness.

  它相對較亮，但不如LCD的亮度。

• Some CRTs are round spherical or cylindrical shapes but new CRTs are flat.

  一些CRT是圓形的球形或圓柱形，但是新的CRT是平坦的。

• They are very large heavy and bulgy.

  他們很大很笨重。

• They also consume a lot of electricity and produce a heat.

  它們還會消耗大量電能并產生熱量。

翻譯自: https://www.includehelp.com/basics/cathode-ray-tube-in-computer-graphics.aspx

圖形學 射線相交算法

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