From enthusiasm to economy: precision optical design as a key to making LED luminaries cost-efficient in street lighting and architectural lighting

2010 ◽  
Author(s):  
Andreas Timinger
Keyword(s):  
Optical Design ◽  
Street Lighting ◽  
Architectural Lighting ◽  
Cost Efficient

PROTOTYPING OF DIFFRACTIVE GRATING OPTICS FOR SENSOR APPLICATION BY AN INTEGRATED PROBE-BASED SYSTEM

2009 ◽  
Vol 06 (01) ◽  
pp. 1-12
Author(s):  
LO-MING FOK ◽  
YUN-HUI LIU ◽  
WEN J. LI
Keyword(s):  
Optical Design ◽  
Polymer Surface ◽  
Diffractive Optical Elements ◽  
Laser Beam Shaping ◽  
Optical Elements ◽  
Atomic Force ◽  
Manipulation System ◽  
Cost Efficient ◽  
Lens Surface ◽  
Lithography Technique

Diffractive Optical Elements (DOE) are often associated with the use of laser beam shaping equipment. They can be controlled and verified flexibly according to application. This paper demonstrates experimentally the lithography technique used to fabricate a DOE with precisely aligned pattern on a polymer surface. We have designed and fabricated a grating on the lens surface using the direct lithography by an Atomic Force Microscope. A description of the optical design is presented along with a discussion on the integrated manipulation system. The fabrication process has been proven to be cost efficient and reliable. It is believed that this technique can also transfer onto a complicated DOE.

scholarly journals A Fiber-Optic Gas Sensor and Method for the Measurement of Refractive Index Dispersion in NIR

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3717 ◽  
Author(s):  
Matej Njegovec ◽  
Denis Donlagic
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Near Infrared ◽  
Optical Design ◽  
Infrared Region ◽  
Refractive Index Dispersion ◽  
Measurement Resolution ◽  
Fabry Perot ◽  
Good Potential ◽  
Cost Efficient

This paper presents a method for gas concentration determination based on the measurement of the refractive index dispersion of a gas near the gas resonance in the near-infrared region (NIR). The gas refractive index dispersion line shape is reconstructed from the variation in the spectral interference fringes’ periods, which are generated by a low-finesse Fabry-Perot interferometer during the DFB diode’s linear-over-time optical frequency sweep around the gas resonance frequency. The entire sensing system was modeled and then verified experimentally, for an example of a low concentration methane-air mixture. We demonstrate experimentally a refractive index dispersion measurement resolution of 2 × 10−9 refractive index units (RIU), which corresponds to a change in methane concentration in air of 0.04 vol% at the resonant frequency of 181.285 THz (1653.7 nm). The experimental and modeling results show an excellent agreement. The presented system utilizes a very simple optical design and has good potential for the realization of cost-efficient gas sensors that can be operated remotely through standard telecom optical fibers.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Street lighting and its future

1961 ◽  
Vol 7 (74) ◽  
pp. 100-103
Author(s):  
W.R. Stevens ◽  
H.M. Ferguson
Keyword(s):  
Street Lighting

Street lighting

1955 ◽  
Vol 26 (102) ◽  
pp. 107
Author(s):  
A.A. Marshall
Keyword(s):  
Street Lighting

Modern university as an economic growth driver: Models & missions

2017 ◽  
pp. 58-76 ◽  
Author(s):  
A. Karpov
Keyword(s):  
Economic Growth ◽  
Education Research ◽  
Advanced Technology ◽  
Global Competitiveness ◽  
Technology Markets ◽  
Fast Growing ◽  
Business Ecosystem ◽  
Cost Efficient ◽  
National Economies ◽  
The University

The paper considers the modern university as an economic growth driver within the University 3.0 concept (education, research, and commercialization of knowledge). It demonstrates how the University 3.0 is becoming the basis for global competitiveness of national economies and international alliances, and how its business ecosystem generates new fast-growing industries, advanced technology markets and cost-efficient administrative territories.

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