Researchers at the University of Shanghai for Science and Technology developed a groundbreaking 3D optical disc capable of storing up to 1.6 petabytes of data—equivalent to over 200,000 DVDs on a ...

Our first toe in the water with 4K Blu-ray is also a first in its own right: 2008's Iron Man. It's the movie that kickstarted ...

Multi-wavelength light sources are required for optical transceivers to increase data. However, scaling the laser array size ...

A new kind of the rotary encoder based on the magneto-optical (MO) storage is proposed. Using the MO methods, a small high-precision high-response rotary encoder can be realized. High precision is ...

Optical sensors can provide either digital or analog outputs. With digital outputs, relative position is determined by counting pulses, and pulse width determines the resolution.

Part 1 of this FAQ looked at the optical rotary encoder, a low-cost, high-resolution, easy-to-use sensor for indicating incremental shaft position (although it can be “upgraded” to indicate absolute ...

Q: What are the functional elements of the optical encoder? A: The optical encoder has an LED light source, a light detector, a “code” disc/wheel mounted on the shaft, and an output signal processor ...

In this paper, a high-precision rotary encoder based on a sinusoidal transmissive pattern (STP) is proposed for detecting shaft rotation. The STP disk can be realized by coating bell-shaped ...

Optical discs, such as DVDs and Blu-ray discs, are durable and inexpensive. A standard single-layer Blu-ray disc can store 25 gigabytes.