Reverse Engineering A Disposable Camera by vivian young

Casing: For the first step, we pried off the outer casing using a screwdriver. The casing protects the parts inside the camera from being damaged and holds them in place at the same time. It also prevents light from coming into contact with the film before the shutter opens.
Shutter: The shutter opens and closes between the lens and the film when an image is being captured. The shutter also determines how long the film is exposed to light.
Lens: (top) The lens was a curved piece of plastic and its purpose is to redirect beams of light bouncing off an object so that they come together and form a picture that looks like the real image. Gas Discharge Tube: (Not pictured (in flash)) The gas discharge tube is filled with xenon gas, the type of gas in things like fluorescent lamps. When the flash is triggered an electrical current is conducted and the electrons and electrodes on each end of the tube move towards each other. As the electrons move, they energize the xenon atoms, creating visible light (flash).
Film: The film is a light sensitive emulsion on a plastic base. The light reflected off the objects in the camera's FOV, when the picture is being taken, enters through the lens and strikes the emulsion, recording an image.
Flash Circuit: Light is needed to record images onto the film, but a lot of indoor environments don't produce an abundance of bright light. The flash fixes this problem cheaply, and easily. The flash is made of three major parts, the battery (source of energy), a gas discharge tube (the device that creates the flash), and an electrical circuit that connects the two aforementioned together. These three components together create a flash.

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