The article focuses on enhancement of advanced freeform optics by using subaperture stitching. Topics include advancement in freeform fabrication technology with improved diamond turning, grinding, and polishing machines; information on profilometry which is a cost-effective technique for measuring aspheric shapes; and an information that subaperture stitching lacks the ghosting and other diffraction artifacts in a computer-generated hologram that can corrupt mid-spatial frequency estimates.
COMPUTER software, RAPID prototyping, LIGHTING, ENERGY consumption, and OPTICS
The article offers information on software tools that design freeform optics for illumination. Topics discussed include newly developed tools integrated with commercial illumination software quickly create freeform reflective and refractive surfaces, freeform optics tailor resulting illumination pattern to meet system requirements such as enhance the visual appeal and improve energy efficiency.
RAPID prototyping, LIGHTING, LIGHT emitting diodes, and ELECTROLUMINESCENT devices
The article offers information on the use of freeform optics as a light collectors and uniformizers for spotlight and directional-floodlight general-illumination light emitting diodes (LEDs). An LED freeform illumination lens-design approach developed by researchers at the University of Arizona is mentioned. It states that the goal of a good freeform optical design for LED floodlighting is to obtain good intensity uniformity throughout the floodlit area.
RAPID prototyping, ELLIPSOIDS, AUTOMOBILE lighting, STREET lighting, ANTENNAS (Electronics), and LIGHT emitting diodes
The article focuses on designing freeform surfaces, which are used for illumination applications such as headlights, streetlights, and antennas. It says that illumination systems using freeform surfaces may result to compact systems with long lifetime, low power consumption, and high system efficiency, if combined with light-emitting diodes (LEDs). It highlights the dominant surface construction methods such as flux mapping method and the method of supporting ellipsoids.
Deals with the strategic planning that increases optical prototyping efficiency. Research of the Center for High Tech Materials at the University of New Mexico; Design of the lens; Significance of a strong line of communication.
Reports that applications engineers at GSI Lumonics Inc. have developed a software that allows users to create simple, virtual prototypes from the company's line of galvanometers and resonant scanners. Selection of a starting configuration by defining the scanner/mirror combination or application of interest; Graphical depiction of the performance results.
Laser Focus World. Jul99, Vol. 35 Issue 7, p28. 3p. 1 Black and White Photograph.
Reports on the microstereophotolitography process of producing micron-sized mechanical parts developed by Chris Chatwin and colleagues at the University of Sussex in Brighton, England. How the process works; Comparison with stereolithography processes; Equipment used in the process.
The article offers information on a parallel projection galvanometer scanning (PPGS) technique developed at Wenzhou University in Wenzhou, China, which enables laser materials processing on freeform surfaces. It states that three dimensional (3D) galvanometer scanning system was designed to address the challenges of handling laser materials processing. It adds that PPG method does not require the use of expensive robots or five-axis machine tools.
PHOTOVOLTAIC power systems, ELECTRIC power production, PHOTOVOLTAIC power generation, HEAT transfer, and OPTOELECTRONIC devices
Reports on how heat-transfer simulation can aid in thermophotovoltaic prototyping. Overview of thermophotovoltaic energy generation; Suitability for improving efficiency of fossil-fuel-driven power plants and powering cleanly combusting, electrically-driven automobiles; Difference of thermophotovoltaic systems from typical electronic systems; Observation of a significant amount of heat transfer to the air surrounding the thermophotovoltaic device.
The article reports on the research about the significance of fiber lasers for rapid prototyping conducted by SPI Lasers, a Southampton, England-based firm which specializes in power fiber lasers used in the industrial market. The researchers try to show that rapid prototyping can be further improved through better surface finish and increased fill density made possible by fiber lasers. Moreover, it was emphasized that the temporal and spatial stability of fiber lasers help in the improvement in layer uniformity.
TECHNOLOGICAL innovations and PROTOTYPE design & construction
Looks at researchers demonstrating linear micromotors at the Max-Planck-Institute fur Biophysikalische Chemie, Germany. How motor is fabricated; Prototyping abilities; Device free of mechanical connections.