Lighting science: an article to let you understand all the electric light source spectrum

This is a test if you reach the level of 60 science, please self-test, or turn out black friend. A, thermal radiation source

1, incandescent light-emitting principle played iron? Bake the string? Burnt induction cooker? Use a bath bully? Heat up the glow. Yes, this elder brothers hair light, is by the current 'burn out'.

2, reflective knowledge small incandescent bulb

reflective light bulbs are divided into R and PAR, R ( 反射器) Type usually USES the inside coating, PAR is the full name of Parabolic Aluminised Reflector ( Aluminum parabolic reflection shape) 。 In addition, the reflective light bulbs common and AR and MR, respectively is Aluminium Reflector ( Aluminum reflection shape) 和Multiface反射器( Polyhedral reflection shape) 。

3, halogen tungsten lamp

luminescence principle of halogen tungsten circulation, be clear at a glance, do not need to talk about. If you don't understand, trouble yourself to buy a piece of bean curd, thank you.

4, reflective halogen tungsten lamp small knowledge

we usually see MR11, MR16, PAR20, PAR30 PAR38, PAR56, etc. , at the back of the digital representation is the diameter of the light source, with 1/8 of an inch. So MR16 is 16 * 1/8 = 2 inches in diameter material 51 mm, so there is also a manufacturer said MR16 illuminant QR - so CBC51。 Other and so on.

2, gas discharge lamp

1, the straight tube fluorescent lamp

glow principle ( As shown in the figure below) Electrode ( 1) ; Releasing electrons ( 2) ; Into the tube, the collision to the mercury atoms ( 3) ; Make the mercury atom electronic ( 4) ; Transition occurred after stimulation, release ultraviolet radiation ( 5) ; After the wall of phosphor coating ( 6) ; Ultraviolet radiation into visible light, 7) 。

the knowledge to keep up with the MR16, T5, T8, we say at ordinary times and T12 before, at the back of the digital representation is the diameter of the tube, is an unit with 1/8 of an inch. So the T5 is about 16 mm in diameter, T8 is 26 mm in diameter.

2, compact fluorescent lamps, the little knowledge

compact fluorescent lamps often use it or number of u-tube length to label and distinguish.

no singleU ( 1U)

　　Ddouble U( 2U)

　　Ttriple U( 3U)

Llong U chopsticks tube

3, metal halide lamp

knows the natural luminous principle, do not want to understand wrote you do not understand, also want to know, go out then make a left turn, baidu to understand.

4, high-pressure sodium lamp

3, LED

figure LED principle ( Image network)

? 60 points level?

Bober

cloud know micro classroom lighting