Digital Cameras….. How Do They

Work?!?!?

Digital Cameras….. How Do They

Work?!?!?

Alisa PulverBrooke Carstensen

Alisa PulverBrooke Carstensen

First CameraFirst Camera The first form of a

camera was created by the Chinese in the 4th century B.C. This camera, also known as a camera obscura, was a darkened room with a hole in the wall or drapes that projects an image of the outside world onto a distant wall.

The first form of a camera was created by the Chinese in the 4th century B.C. This camera, also known as a camera obscura, was a darkened room with a hole in the wall or drapes that projects an image of the outside world onto a distant wall.

The first roll-film camera was created in

1888 by George Eastman. Shortly after the company Eastman Kodak emerged as a

result of his invention. Following this

breakthrough, the camera continues to

evolve rapidly.

The first roll-film camera was created in

1888 by George Eastman. Shortly after the company Eastman Kodak emerged as a

result of his invention. Following this

breakthrough, the camera continues to

evolve rapidly.

TechnologyTechnology

The technology used in the creation of the digital camera converts images into electrical or digital impulses and records them on a magnetic strip.

This process requires an image sensor to detect light color and intensity.

The technology used in the creation of the digital camera converts images into electrical or digital impulses and records them on a magnetic strip.

This process requires an image sensor to detect light color and intensity.

Another FirstAnother First

The first truly digital camera, pixel based camera with an image sensor AND a storage device (which allows the picture to be saved) came out in 1991.

This Kodak creation was used specifically for photojournalism.

Digital cameras would not be used commercially for three more years.

The first truly digital camera, pixel based camera with an image sensor AND a storage device (which allows the picture to be saved) came out in 1991.

This Kodak creation was used specifically for photojournalism.

Digital cameras would not be used commercially for three more years.

Compare and ContrastCompare and Contrast

Film Cameras: Film Chemicals

Film Cameras: Film Chemicals

Digital Cameras:BatteriesBuilt in Computer Record image

electronically

Digital Cameras:BatteriesBuilt in Computer Record image

electronicallyAll cameras capture and record an imageHave the same basic parts:

Lens Shutter

A beam splitter directs light to the different sensors.

The camera records each of the three colors at each pixel location.

http://electronics.howstuffworks.com/digital-camera3.htm

What is a CCD? What is a CCD?

Stands for Charge-Coupled Device

Comprised of millions of tiny sensor points called photosites that sense the light that enters the camera.

Stands for Charge-Coupled Device

Comprised of millions of tiny sensor points called photosites that sense the light that enters the camera.

CapacitorsCapacitors

After the CCD and photosites sense the light, an electronic device called a capacitor stores a charge or voltage that is equal to the light’s intensity.

This charge is then passed along to another Capacitor (the CCD has a chain of capacitors that are coupled together).

After this process a register makes the appropriate calculations and the image is formed

After the CCD and photosites sense the light, an electronic device called a capacitor stores a charge or voltage that is equal to the light’s intensity.

This charge is then passed along to another Capacitor (the CCD has a chain of capacitors that are coupled together).

After this process a register makes the appropriate calculations and the image is formed

Basically….Basically….

The CCD sensor is a tool that creates a map of photosites based on the electric charge created when the photons of light slam into the sensitive picture elements.

The CCD sensor is a tool that creates a map of photosites based on the electric charge created when the photons of light slam into the sensitive picture elements.

Pixels and ResolutionPixels and Resolution

Photons are converted into electrical charge

Electrons are then sent to an analog-digital-converter

Photons are converted into electrical charge

Electrons are then sent to an analog-digital-converter

Information is then turned into a digital binary form and can be viewed on the LCD screen

Fixed & Removable storage systemsMemory cardFlash stick

Information is then turned into a digital binary form and can be viewed on the LCD screen

Fixed & Removable storage systemsMemory cardFlash stick