Features | Photonics Spectra

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Features

The silicon positive-intrinsic-negative (PIN) photodiode is a ubiquitous component that detects light in photometric devices from fluorescence instruments in the laboratory to laser speed guns on the highway. Each application has different requirements for price, frequency, response time and sensitivity, and designers must often trade off one or more of those requirements to obtain optimum performance for a given application. Meet the authors Nick Bertone is a product manager at PerkinE...

Photonics Spectra, August 2000

Back-Illuminated Camera Images the Future of Spaceflight

Rocket power blazed the early trails that took us into orbit, but aerospace engineers have endeavored to develop a jet-propelled aircraft able to reach orbital velocities from Mach 20 to 25. One possibility is the supersonic combustion ramjet, or...

Photonics Spectra, July 2000

Bring Images to Life

Making photographs at the microscope can be difficult. For example, magnification produces problems associated with the depth of field, and diffraction creates problems with image resolution. One of the most difficult aspects of photographing...

Photonics Spectra, July 2000

Catch Your Drift

Whether a laboratory researcher or an optical-equipment manufacturer, you’ll be concerned with how temperature changes affect your optical system. A thermally stable mount will lead to improved optical-system performance as the ambient...

Photonics Spectra, July 2000

Death, Taxes and Shot Noise

Have you ever watched a live video line from your fine camera on an oscilloscope? Were you bothered by the pixels bouncing up and down from time to time? The sensor manufacturer promised a signal-to-noise ratio of 1000:1, and you designed your...

Photonics Spectra, July 2000

Ion Lasers:

When diode-pumped solid-state lasers first appeared in the marketplace during the early 1990s, argon-ion, helium-neon and other classic laboratory lasers seemed doomed. The newer technology was more compact and rugged, allowing researchers freedom...

Photonics Spectra, July 2000

Light Levels and Noise Guide Detector Choices

Photonics is an enabling technology that creates benefits and value far in excess of the cost of the optoelectronic components that are used in a device or system. As such, photonics is responsible for increasing the length of our lives as well as...

Photonics Spectra, July 2000

Measuring Optical Quality

... The optics industry has helped to shape these standards for indicating tolerances. At the same time, methods of measurements are becoming standardized, so not only does everyone understand tolerances, but the relevant optical testing also...

Photonics Spectra, July 2000

Thorough Testing Produces Fiber Lighting System

A fiber optic distributed lighting system can illuminate exterior door handles, puddle lamps and running boards in vehicles, eliminating the need for incandescent lamps or light-emitting diodes in these high-moisture, -shock and -vibration areas....

Photonics Spectra, July 2000

A Model of Efficiency

Product advances based on classical illumination technology have primarily correlated with advances in lamp technologies: higher brightness, shorter arc and/ or higher pressure. But rethinking the design of an illumination system can advance the...

Photonics Spectra, June 2000

Integrating Spheres Create ’Artificial Sunshine’

When testing a camera system or a material’s weathering performance, researchers need a stable, uniform light source that closely mimics the conditions that the product will encounter in its actual application. For devices that work on Earth...

Photonics Spectra, June 2000

Managing Polarization Mode Dispersion

The increasing demand for bandwidth is driving most telecommunications operators toward the deployment of large-capacity transmission systems. Systems based on 10-Gb/s channel rates are being deployed, and suppliers have announced plans for channel...

Photonics Spectra, June 2000

Small Block Cameras Tackle Tough Tasks

They go where humans can’t. Sometimes they go where no camera has gone before. Often they go where they can’t be seen. And what they see (and enable us to see) is revolutionizing the use of video cameras in the industrial, law...

Photonics Spectra, June 2000

Small Optics Offer Big Correction

At the heart of many photonics projects is a microlens or an array of microlenses. Whether one is attempting to design and fabricate a laser diode corrector, optical fiber coupler, optical storage device or any other microlens-incorporating device,...

Photonics Spectra, June 2000

Telecom Test Equipment Takes to the Outdoors

The ever-growing demand for more bandwidth is creating a breakneck pace in the development and implementation of new optical telecommunications technologies. And when we compare transport capacity developed in the laboratory with installed capacity,...

Photonics Spectra, June 2000

To Manufacture More, Automate

The rapid expansion of dense wavelength division multiplexing telecommunications networks has created a worldwide demand for optoelectronic devices that is becoming increasingly more difficult to meet. This stems primarily from the limitations...

Photonics Spectra, June 2000

Big Hopes for Small Lasers

The growth in telecommunications, data storage and data processing is driving fiber optic data communications to progress at a breathtaking rate. At the "edge" of the network, outside the dense wavelength division multiplexed long-haul core, is the...

Photonics Spectra, May 2000

Display Measurement: Measure What You See

Significant advances in display technology have been made in recent years, creating new market opportunities and applications. Liquid crystal and thin-film transistor displays are commonly integrated into motor vehicles and aircraft cockpits. They...

Photonics Spectra, May 2000

Industrial Lasers Make Their Mark

Like TV’s Tim "The Tool Man" Taylor, industrial laser users demand more power from their tools. Higher powers expand the capabilities of the lasers, including their ability to cut and weld thicker metal materials. Although North American...

Photonics Spectra, May 2000

Lab and Factory Share Lasers

In the beginning, the development of scientific lasers was stimulated almost entirely by the applications that users could dream up. Over the last three decades, flashlamp-pumped pulsed Nd:YAG laser technology has matured almost fully, and the...

Photonics Spectra, May 2000

Opening the Terahertz Window

Exploration of the far-infrared region of the electromagnetic spectrum has been frustrated by the difficulty of generating and detecting radiation at terahertz frequencies (0.1 to 10 THz). Researchers had to contend with low-brightness thermal...

Photonics Spectra, May 2000

Photonics Design & Solutions:

Machine vision users are beginning to consider color imaging an important source of information for quality assurance and part verification. Applications in lumber sorting, food inspection, digital film conversion and print inspection are among...

Photonics Spectra, May 2000

Photonics in: Consumer Goods

People in Tokyo like to line up. They line up at 4 a.m. to obtain a box of traditional sweets or the tickets for the last concert of a minor pop singer. Long lines of people even wait for shops to open. But never have the lines been longer than they...

Photonics Spectra, May 2000

Photonics in: Medicine

Photonics plays a key role in medicine and health care. Lasers, with their precise targeting of tissues and locations, have found a home in many areas of surgery. Digital images and their transmission and display are critical in diagnostic...

Photonics Spectra, May 2000

Photonics in: Military/Aerospace

The technological force that was on display during the Persian Gulf conflict in the early 90’s represented the beginning of the end for the military’s traditional role as the sole standard-bearer of advanced technology. The New World...

Photonics Spectra, May 2000

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