Holography | 2D 3D Hologram Displays

Who were the key figures in the early development of holography, and what were their major contributions? The early development of holography is a captivating chapter in the history of optics, characterized by significant contributions from several pioneering scientists. Dennis Gabor, a Hungarian-born British scientist, is universally recognized as the father of holography. In 1947, while striving to improve the resolution of electron microscopes, Gabor developed the theoretical foundations of holography. His groundbreaking work involved the concept of wavefront reconstruction, where interference patterns in waves could be used to create three-dimensional images. Gabor’s method employed conventional filtered-light sources, but the limitations of these light sources prevented immediate practical applications. The […]

October 31, 2024 / 19 minutes of reading

Mechatronics Engineering

Sensors For Water and Wastewater Monitoring

Introduction Sensors for Water and Wastewater Monitoring are essential technological tools that facilitate the real-time assessment of water quality and levels across various applications, including municipal, industrial, and environmental contexts. By measuring parameters such as pH, turbidity, and chemical composition, these sensors help ensure safe drinking water, effective wastewater treatment, and compliance with environmental regulations. Their significance is underscored by the global challenges of water scarcity and pollution, which demand innovative solutions for sustainable water management and conservation practices. The monitoring landscape encompasses a diverse array of sensor types, including water quality sensors (such as absorbance-based and fluorescence sensors), water level sensors (like ultrasonic and radar sensors), and integrated sensor nodes that

September 12, 2024 / 13 minutes of reading

Mechatronics Engineering

Perovskite Light-Emitting Diodes (PeLEDs)

Introduction Perovskite light-emitting diodes (PeLEDs) represent a groundbreaking advancement in optoelectronics, leveraging the unique properties of perovskite materials to produce highly efficient light-emitting devices. Emerging in the early 2010s, PeLEDs have gained attention due to their remarkable luminescence and tunable emission spectra, leading to their potential application in next-generation displays, lighting, and flexible electronics. Their significance is underscored by a rapid increase in research and development, which positions PeLEDs as a promising alternative to traditional light-emitting technologies like organic LEDs (OLEDs) and inorganic semiconductors. The notable advantages of PeLEDs include their high photoluminescence quantum yields (PLQY), ease of fabrication through solution-based processes, and the capability to produce vibrant colors across a

August 29, 2024 / 14 minutes of reading

Mechatronics Engineering

High-Performance Organic LEDs for Electronic Device Display

Introduction High-performance organic LEDs (light-emitting diodes) (OLEDs) are advanced display technologies that utilize organic materials to emit light when an electric current is applied. Since their inception in the 1960s, OLEDs have gained prominence for their energy efficiency, flexibility, and superior image quality, making them a leading choice for various electronic device displays, including smartphones, televisions, and wearables. Their ability to produce true blacks and a wider color gamut has revolutionized visual technology, driving demand in both consumer and industrial markets. Notable advancements in OLED technology began in the late 1980s when researchers developed layered structures that significantly improved efficiency and performance. This innovation catalyzed extensive research and investment in OLEDs,

August 29, 2024 / 15 minutes of reading