Physics: CD Player

By Jonathan Kui

1997 Laser CD Player

Plays CDs using lasers and old hardware

How does it work?


Aluminum: Reflects laser by using bumps in spiral (reflection= 1, none= 0)

Poly-carbonate Plastic/ Acrylic: Protects aluminum

CD player's laser reads bumps

CD player's Optical pickup takes bumps and turns it into binary (01100010 01101001 01101110 01100001 01110010 01111001)

Analogue Converter turns into analogue signals/ waves

Signal Amplifier makes it so we can hear it better

Where are the parts?

Optic deck (Drive motor): Loads CD properly and spins it

Laser diode: projects laser which reflects off aluminum

Gears: Moves CD back and forth allowing motionless laser to go on line

Optical Pickup/ Electronics Board: Transfers binary to signal, signal to audio


Brain, Marshall. "What the CD Player Does: Laser Focus - How CDs Work." HowStuffWorks. InfoSpace LLC, n.d. Web. 10 Nov. 2014. <>.

Sanctum, Nerd. "How Do CDs Work?" YouTube. YouTube, 28 Nov. 2013. Web. 10 Nov. 2014. <>.

Woodford, Chris. "CD and DVD Players." How Do Work ? Blu-ray Disc Association, 2006. Web. 10 Nov. 2014. <>.

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