Photonics/Optics

Laser Beam vs. Electron Beam Welding Which process works best for what?

Proponents of laser beam welding (LBW) and electron beam (EBW) welding each pronounce the singular praises of their favored technology, but often the best solution for a customer is to use both technologies together. Both processes are well suited to joining components with complex geometries, and capable of meeting the most stringent demands for metallurgical characteristics of the final assembly.

Posted in: Articles, Features, ptb catchall, Photonics

Read More >>

Making Machine Vision Systems Smarter

Machine vision technology is used extensively throughout manufacturing to improve product quality, increase productivity and reduce costs. One of the reasons for that is a machine vision system will work tirelessly on mundane repetitive tasks at high speed with great precision.

Posted in: Application Briefs, Applications, ptb catchall, Photonics

Read More >>

Multi-Wavelength, Multi-Beam, and Polarization-Sensitive Laser Transmitter for Surface Mapping

This laser transmitter can be used for precision mapping and remote sensing.A multi-beam, multi-color, polarized laser transmitter has been developed for mapping applications. It uses commercial off-the-shelf components for a low-cost approach for a ruggedized laser suitable for field deployment.

Posted in: Briefs, TSP, ptb catchall, Tech Briefs, Photonics

Read More >>

Optical Communications Link to Airborne Transceiver

An optical link from Earth to an aircraft demonstrates the ability to establish a link from a ground platform to a transceiver moving overhead. An airplane has a challenging disturbance environment including airframe vibrations and occasional abrupt changes in attitude during flight. These disturbances make it difficult to maintain pointing lock in an optical transceiver in an airplane. Acquisition can also be challenging. In the case of the aircraft link, the ground station initially has no precise knowledge of the aircraft’s location.

Posted in: Briefs, ptb catchall, Tech Briefs, Photonics

Read More >>

General Tool for Evaluating High-Contrast Coronagraphic Telescope Performance Error Budgets

The Coronagraph Performance Error Budget (CPEB) tool automates many of the key steps required to evaluate the scattered starlight contrast in the dark hole of a space-based coronagraph. The tool uses a Code V prescription of the optical train, and uses MATLAB programs to call ray-trace code that generates linear beam-walk and aberration sensitivity matrices for motions of the optical elements and line-of-sight pointing, with and without controlled fine-steering mirrors (FSMs). The sensitivity matrices are imported by macros into Excel 2007, where the error budget is evaluated. The user specifies the particular optics of interest, and chooses the quality of each optic from a predefined set of PSDs. The spreadsheet creates a nominal set of thermal and jitter motions, and combines that with the sensitivity matrices to generate an error budget for the system.

Posted in: Photonics, Briefs, ptb catchall, Tech Briefs, Photonics

Read More >>

Method of Reducing Stray Energy Burns in Laparoscopic Surgery

Active Electrode Monitoring (AEM) instruments incorporate a “shielded and monitored” design to lower risk of injury.Any surgery brings with it risk, both to the patient and the surgeon. However, laparoscopic surgery sometimes brings an additional invisible risk: stray energy burns. Electrosurgical devices and laparoscopic instruments can suffer insulation failures and capacitive coupling, potentially causing stray energy burns to the patient. Often these burns occur out of sight of the surgeon and may go unnoticed until the patient presents with symptoms like peritonitis or sepsis.

Posted in: Bio-Medical, Briefs, Briefs, Surgical Robotics/Instruments, Lasers & Laser Systems, Photonics

Read More >>

Adhesives for Optical Assembly

Adhesives deliver excellent performance on a range of materials used to manufacture optical components, including glass, metal, ceramic and most plastics. By their very nature, adhesives allow devices to be made stronger, faster, and more cost-effectively, living up to the most basic demands of the marketplace.

Posted in: Articles, Features, ptb catchall, Photonics

Read More >>

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.