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We dissembled a basic cell phone that was popular in the late '00s. The cell phone camera, while not exactly like those in smart phones today, is similar in that it contains lenses, apertures, and filters.
The Slit Lamp is an optical device that uses a high-intensity light source, and applying the Kholler Illumination, the light can be focused to shine in a thin sheet of light directly into the eye. This allows the ophthalmologist to examine the anterior and posterior segments of the human eye. And by seeing the shape of the thin sheet on the eye, he is able to give diagnosis of the patient's cornea, retina and even for the contact lenses.
The product explained in the video is a Sony Optical Read Head. It consists of a semiconductor laser diode, a polarization beam splitter, various types of lenses, a mirror, a quarter wave plate and a photo diode array.
Head-up display (HUD) is aimed for car drivers. With HUD, the driver can read information, without moving their eyes away from the road, and drive safely. To achieve this, the display must be transparent and have good readability even under bright sunlight. HUD is powered by a projector light engine. The light comes to a diffused mirror, forms a real image and then is reflected by a reflector to the driver’s eyes. HUD is one of the key parts in the next generation of advanced driving assistance systems.
HTC ONE M7 Smartphone
How can you measure oxygen in your body? Pulse oximetry allows to quantify blood oxygen saturation through the use of two diodes emitting red light and infrared. The variations in absorption of these two "colors" by blood in your finger indicate the degree of oxygen binding to hemoglobin, known as oxygen saturation.
Dye sensitized solar cell: It has been fabricated using two FTO glass. One has been coated with platinum and the other one with TiO2. I annealed this eTiO2 electrode with different temperature and did TiCl4 treatment to get more efficiency out of this cell. The working electrode has been soaked in dye for one day. Then these two electrodes have been stuck using a sealant and I inserted the electrolyte which also contain dye between them. Hence, we have a solar cell and a super capacitor.
The product consists of two parts, the electronic part and the optical part. However the electronic part consists of three resistances, three potentiometers, one operational amplifier, one transistor and one switch. In additional, the optical part is the sensor (photoresistance).
Optical communication is closely connected with our daily life, because our telephone signals, Internet communications and even the cable television signals are all carried by it to some degree. Optical fiber is very thin, whose diameter is comparable with human hair. There are two kinds of optical fiber regarding their supporting mode number, i.e. single mode fiber and multimode fiber. Both of them are made of silica and they are composed of two parts, cladding and core.
Optical fingerprint sensors use frustrated total internal reflection to distinguish the ridges and valleys in a fingerprint. A source illuminates a high refractive index material at a steep angle. When a finger is pressed against the material, the resulting bright and dark regions are captured with a camera and used to identify a person.
This video was created by 3 Chinese students of Beihang University in their first year of college life made by Corel VideoStudioX7. All of us knew little about the nature of the light, thus we wanted to grasp more by this way. And it's also a class summary after taking part in Approaching the Photoelectric Information World. Most of the pictures and video sections were shot by ourselves, while some them were caught from the internet.