Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Publication
- Publication Type
Articles 1 - 3 of 3
Full-Text Articles in Physics
Measuring The Night Sky Brightness Of Butler University, Austin Thomas Jacks
Measuring The Night Sky Brightness Of Butler University, Austin Thomas Jacks
Undergraduate Honors Thesis Collection
Light pollution has had a significant impact on ground-based telescope observations in recent years. As the night sky brightness continues to increase, astronomers are looking for new ways to combat this growing problem. According to the International Dark Sky Association (IDA), “An important part of solving the problem of light pollution is to have a thorough understanding of its magnitude, and a great way to do that is to measure the brightness of the night sky” [1]. The night sky brightness of surrounding Butler University is measured using the Holcomb Observatory 0.95-meter Cassegrain telescope. Different types of filters were used …
Optical Patterns Controlled By Computerized Spatial Light Modulator, Hayder A. Naser
Optical Patterns Controlled By Computerized Spatial Light Modulator, Hayder A. Naser
Al-Qadisiyah Journal of Pure Science
In this work, a contemporary optical system is designed using a technology of spatial light modulator (SLM). This system is depending on the ability of altering light beam into different optical patterns according to a signal feedback injected computationally to the SLM. The effects of control parameters on the SLM operation are studied such us brightness (B) which determines the constant DC voltage applied to SLM pixels, and contrast (C) determines the maximum AC voltage amount that can be applied to the SLM. The influences of the transmission linearity of image intensity are controlled by the gamma adjustment which can …
Design And Fabrication Of Space Variant Micro Optical Elements, Pradeep Srinivasan
Design And Fabrication Of Space Variant Micro Optical Elements, Pradeep Srinivasan
Electronic Theses and Dissertations
A wide range of applications currently utilize conventional optical elements to individually transform the phase, polarization, and spectral transmission/reflection of the incident radiation to realize the desired system level function. The material properties and the feasibility of fabrication primarily impact the device and system functionality that can be realized. With the advancement in micro/nano patterning, growth, deposition and etching technology, devices with novel and multiplexed optical functionalities have become feasible. As a result, it has become possible to engineer the device response in the near and far field by controlling the phase, polarization or spectral response at the micro scale. …