2015 Student Contest Entries

2015 Student Video Entries

 

Cell Phone Camera Dissection
By Sarah Bjornland, University of Rochester, The Institute of Optics, New York, USA

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.

Illumination System in a Slit Lamp
By Camilo Moreno Cleves, Universidad Nacional de Columbia - Sede Bogota, Columbia 

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.

Optics in a DVD Read Head
By Siddharth Varughese, Georgia Institute of Technology, Georgia, USA 

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.

Optics in a Head-up Display
By Qijia Cheng, Nanyang Technological University, Singapore 

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.

OSA Contest by GWU
By Zhizhen Ma, The George Washington University, Washington, DC, USA 

HTC ONE M7 Smartphone

Principles of Pulse Oximetry
By Diego Dumani, Georgia Tech, Georgia, USA 

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.

Rechargeable Battery Using Dye Sensitized Solar Cell
By Sara Bakhshi, University of Central Florida, Florida, USA 

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 Crepuscular Detector
By Alain Francis Talla, University of Yaoundé 1, Cameroon

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).

The Optical Fiber
By Jin-hui Chen, Nanjing University, China 

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.

The Optics of Fingerprint Sensors
By Courtney Krafczyk, University of Illinois at Urbana Champaign, Illinois, USA

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.

Wave Phenomena of Light
By Zijie Gong, Beihang University, China 

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.