Microscopy | Photonics.com

MICROSCOPY FEATURES

A Basement Full of Lasers Oct 1, 2001 — It's a short walk from the third floor of the Welch Building on the University of Texas campus to the basement of the Engineering Science Building. That's enough, however, for mid-August in Austin to work its magic. Temperatures above 100 make the...

Photonics Spectra, Oct 2001

Chameleon Lasers May 1, 2001 — Cell biologists have long used wavelength discrimination to optically map structure and function at the cellular and subcellular level. The advent of the confocal laser scanning microscope has enabled such observations in three dimensions, close to...

Photonics Spectra, May 2001

Putting Imaging Under the Microscope Oct 1, 2000 — At the Cornell University Integrated Microscopy Center in Ithaca, N.Y., the imaging system is based on an Axioplan 2 microscope from Carl Zeiss and a SensiCam camera from the Cooke Corp. of Auburn Hills, Mich. A look at the center’s recent...

Photonics Spectra, Oct 2000

Appearances Can Be Deceiving Aug 1, 2000 — Most commercial lens assemblies such as lenses for cameras and microscope objectives are reasonably priced (on the order of several hundred dollars) and are available immediately. A custom-designed lens assembly looks the same externally, but its...

Photonics Spectra, Aug 2000

Defining Performance Aug 1, 2000 — In laser applications such as materials processing, environmental monitoring and confocal microscopy, understanding the laser’s performance is critical. A laser that operates erratically as it drills holes in steel could fail to penetrate the...

Photonics Spectra, Aug 2000

Bring Images to Life Jul 1, 2000 — 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, Jul 2000

Imaging/Detectors: Scientific Imaging Jan 1, 2000 — Five years ago, high-performance charge-coupled device cameras were slow, monolithic and difficult to use. Today, the cameras are significantly faster, often much smaller and almost completely software-controlled. In the coming several years, we...

Photonics Spectra, Jan 2000

A Start on Parts for Multiphoton Microscopy Nov 1, 1999 — Ten years ago, in a Cornell University laboratory in Ithaca, N.Y., researchers unveiled the first multiphoton microscope for biological imaging. The biomedical research community quickly realized the virtue of the technology, which demonstrated that...

Photonics Spectra, Nov 1999

Water Researchers Perfect Monitoring Techniques Oct 1, 1999 — Microbiologists in California’s Orange County use a wide range of microscopy and imaging techniques to examine the organisms within the local water supply. New laser and fluorescence systems could offer improvements. Water quality is a primary...

Photonics Spectra, Oct 1999

Optical Old-Timer Finds a New Niche Jul 1, 1999 — Calcium fluoride springs out of the IR to open a window for deep-UV semiconductor lithography. Calcium fluoride (CaF2) is something of a prima donna in the world of optical lens materials. Even where it occurs naturally as the mineral fluorite, the...

Photonics Spectra, Jul 1999

Making it Bigger: Mar 1, 1999 — Many manufacturing processes utilize on-line microscopy. Microscopes (optical systems with magnification greater than one) align, inspect and guide robotic assembly of precision parts. Microscopes are quite different from cameras with smaller...

Photonics Spectra, Mar 1999

Innovations in Optical Scanning Probe Microscopy Jan 1, 1999 — The combination of optical and scanning probe microscopy offered by near-field scanning optical microscopes allows researchers to image the light response from small optically active surfaces such as gallium nitride structures, quantum dots, laser...

Photonics Spectra, Jan 1999

Thin-Film Coating Applications Heat Up Jan 1, 1999 — Optical coatings are one means of controlling heat in lighting applications such as film projectors and microscope illumination systems. Unfortunately, suppliers of multilayer dielectric coatings have primarily emphasized spectral performance,...

Photonics Spectra, Jan 1999

Evidence Analysis: Nov 1, 1998 — For years, forensic scientists relied on chemical tests and microscopes to examine evidence gathered at crime scenes. Such techniques often provided inconclusive results or resulted in the destruction or contamination of evidence. By the mid 80s,...

Photonics Spectra, Nov 1998

Laser Analysis: Oct 1, 1998 — Valid information about the performance of a laser is the foundation for its proper use. As the variety of commercial lasers increases, users need a greater overall understanding of how to measure their output. Sensors, readouts and test setup can...

Photonics Spectra, Oct 1998

Photonics in Industry Aug 1, 1998 — Industrial applications of photonic systems are growing steadily as manufacturers realize the benefits of light-based technologies. Laser systems help to create products by cutting, drilling and welding materials; imaging and analysis systems work...

Photonics Spectra, Aug 1998

Target Acquisition: Jul 1, 1998 — The criteria that the military uses to develop its targeting and surveillance imagers may be useful to those who are developing other types of imaging systems, such as microscopes, machine vision systems, consumer digital cameras and surveillance...

Photonics Spectra, Jul 1998

Optical Morphology: Jun 1, 1998 — For many people, optics are but one of the many components that make up a system. They understand the specifications the optics must meet but, many times, they do not know nor are they concerned about the broader performance characteristics of the...

Photonics Spectra, Jun 1998

Detector Choices: May 1, 1998 — Whether they need to image faraway stars, microscopic organisms or bottles on an assembly line, users of imaging systems face many choices: What type of light will work best? How does color play a role? Where should I position the camera? In...

Photonics Spectra, May 1998

Image Analysis: Nov 1, 1997 — With the increasing importance of quality control as a competitive tool, manufacturers are in constant search of technology solutions that will assist them in improving their production processes. In the lab, automated image analysis is rapidly...

Photonics Spectra, Nov 1997

Microspectroscopy: Sep 1, 1997 — Imagine watching a single chemical bond be created or broken, examining a crystalis molecular arrangement or seeing the molecular distribution of lipids, proteins, and minerals in clogged arteries. Increasingly, this is the kind of work that...

Photonics Spectra, Sep 1997

Imaging with Nonlinear Optics Jul 1, 1997 — One of the more surprising applications of femtosecond lasers is the imaging of sensitive biological structures, which appear to tolerate the onslaught of peak power densities of more that 1011 W/cm2, better than the 105 W/cm2 in a confocal or even...

Photonics Spectra, Jul 1997

Fiber Bundle Grows Microscopy Tools Mar 1, 1997 — Near-field optical techniques employ a single nanometer-size aperture that scans across a region of interest. Increasing the number of apertures expands the area that can be scanned at one time. Tufts University researchers have generated thousands...

Photonics Spectra, Mar 1997

Microscopy: Old Technology Gets New Life Jan 1, 1997 — Over the last 150 years of microscope development, an impressive array of innovations has come to light. Today’s seemingly commonplace imaging techniques include phase contrast, which won a Nobel prize for the Zeiss developer Frits Zernicke when...

Photonics Spectra, Jan 1997

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