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 Laser
Mirrors
Laser Research Optics, a division of Meller Optics, provides a full
line of carbon dioxide (CO2) mirrors and phase-retardation reflectors
for low-power lasers used in industrial marking, etching, and soldering
applications. The laser mirrors, designed for use with 25- to 200-W
industrial lasers, are made from silicon or molybdenum, which is
more durable in applications that require frequent cleaning. The
average reflectance is >99.5 to 99.7% for the silicon mirrors—
and 98% for the molybdenum mirrors—at 10.6 mm and a 45°
angle of incidence. CO2 laser mirrors made of either material are
available in outer diameters of 0.5 to 1.5 in. The silicon mirrors
can be enhanced with silver, copper, or dual-band coatings, and
phase-retardation reflectors with < l.5% total absorption are
also available.
Laser Research Optics
120 Corliss Street
Providence, RI 02904
Optical Gel
The Fiber Optic Center, a worldwide supplier of materials to high-tech
companies, has available the low-index, optically clear optical
gel LS-3238 made by Lightspan. The gel is a soft encapsulation material
designed especially to protect sensitive phonics and fiber optics
modules from mechanical and thermal shock, dust, and moisture. The
gel has a refractive index of 1.38, which aids internal reflection
in silica fiber, optical glass, and plastic substrates. The optically
clear gel permits postcure inspections of delicate assemblies. Its
ultralow gel modulus permits high levels of strain without an excessive
stress buildup in sensitive fiber or wire bond runs. LS-3238 cures
in 24 h at room temperature without requiring UV exposure or a high-temperature
bake, and its standard service temperature ranges from –40°
to +200°
C. Fiber Optic Center
23 Centre Street
New Bedford, MA 02740-6322
 Photoetched
Parts
Photofabrication Engineering can photoetch intricate, burr-free
electronic parts in production quantities from standard or exotic
noncorrosive metals without inducing the stresses common to machined
parts. The company photoetches all types of metals —from aluminum
to zirconium and including pure titanium—to produce parts for
many industries, including the medical, nuclear, automotive, microwave,
and aerospace sectors. Examples include optical encoder disks, heat
sinks, seam-weldable lids for microelectronics packages, and thermal-switch
components. Photofabrication stocks more than 2,000 materials that
range in thickness from 0.013 to 22.86 mm. Delivery typically takes
three to four weeks from the receipt of an order.
Photofabrication Engineering, Inc.
500 Fortune Boulevard
Milford, MA 01757
 Reflecting
Plastic
Gigahertz-Optik’s Optically Diffuse Material—a white optical-grade
plastic that the company calls OP.DI.MA.—has many uses in lighting
design, laser, and reflection –transmission applications. The
material has a diffuse reflectance of >98% from 400 to 1,600
nm and >95% from 250 to 2,000 nm. OP.DI.MA. provides a uniform
reflectance across this spectral range, over a large area, and at
temperatures up to 200° C as standard and 300° C during
short exposures. Other material features include long-term ultraviolet
stability, high maximum permissible radiation flux densities, and
the ability to be cleaned and resurfaced. Applications include white
reflectance standards, reflectors, projection screens, laser cavities,
and integrating-sphere coatings. OP.DI.MA. is available as sheets,
blocks, squares, or round plates in several thicknesses.
Gigahertz-Optik, Inc.
5 Perry Way
Newburyport, MA 01950-4009
 Optics
Wipes
Opto-Alignment has added a new configuration to its line of bulk-packed
precision- lens cleaning wipes. Increasingly, many companies in
the photonics industry must deal with large numbers of small optical
components. The new 2 × 4-in. Opto-Wipes are soft, lint-free,
and aimed particularly at fabricators, coaters, and assemblers who
need to clean or package small optical parts. Opto-Alignment says
the new configuration provides increased convenience and reduces
waste. Opto- Wipes are specifically designed for precision optics
and can be used on glass, plastics, coatings, and cr ystals. They
are available in several standard configurations up to 12 ~ 12 in.
The wipes retain and dispense solvents at an optimal rate, trap
contaminants, leave no residue, and do not damage optical elements.
Opto-Alignment Technology, Inc.
95 Mt. Read Boulevard
Rochester, NY 14611
 Coated
Mirrors
Optical Surfaces produces extremely durable coated mirrors up to
600 mm in diameter for use with high-power femtosecond lasers in
applications that include plasma physics, laser manufacturing, and
telecommunications. The company uses proprietary manufacturing techniques
and the latest dielectric technology to produce off-axis paraboloids,
which optimize the performance of rapid-pulsed lasers, from materials
such as glass, ceramic, and silica. The mirrors provide minimum
pulse distortion and the maximum usable bandwidth. When used with
high-power femtosecond lasers operating at 750 to 850 nm, these
Optical Surfaces mirrors accommodate power densities up to 100 mJ/cm2
for continuous 50-fs pulses.
Optical Surfaces Ltd.
Godstone Road, Kenley Surrey
England CR8 5AA
Transit Plate
Pinpoint Laser has introduced a new azimuth transit plate as part
of its Laser Microgage measuring system for use in alignment applications
in manufacturing and engineering. The new plate enables high accuracy
in measuring straightness, flatness, parallelism, and leveling.
When the Laser Microgage is mounted atop the azimuth transit plate,
the laser'fs reference beam can be leveled, turned, and positioned
to make measurements with a precision of 0.001 in. over distances
up to 50 ft. This accuracy makes the enhanced Laser Microgage ideal
for applications such as shipbuilding, machinery installation, aligning
rollers and guides, and adjusting machine tools. Precision adjustment
screws control the azimuth, level, and swing position of the plate,
which can be mounted on a tripod or bolted to a framework or piece
of machinery.
Pinpoint Laser Systems
3 Graf Road
Newburyport, MA 01950
New Literature
Inorganics Catalogue
Alfa Aesar has published its new High Purity Inorganics Catalogue,
which lists hundreds of high-purity materials used in research and
production. The 48-page publication includes listings of base-metal
compounds, rare-earth compounds, and ultradry materials for air-
and moisture-sensitive applications. Alfa Aesar also carries Puratronic
high-purity base-metal salts, which are used in the pharmaceutical
and electronics industries as the basic building blocks of many
manufacturing processes. Each Puratronic compound has a minimum
purity of 99.99% and comes with a certificate of analysis. The catalogue
also includes the REacton line of high-purity rare-earth compounds
and Alfa Aesar'fs comprehensive line of ultradry materials.
Alfa Aesar
30 Bond Street
Ward Hill, MA 01835-8099
 Seal
Assemblies
Bomco has released a new catalogue of quartz-to-metal seal assemblies
intended for designers and manufacturers of lasers, sight windows,
high-wattage lamps, electro-optical equipment, and semiconductor
products. It also explains how designers can use Bomco'fs proprietary
tubular quartz-tometal seal technology to create smaller higher-performance
electrooptical components. For those working with molecular-beam
epitaxy, the company provides a standard line of lowstrain, fusedquartz,
ultrahigh- vacuum (UHV) windows in flange sizes from 1.33 to 4.5
in., protective shields for UHV windows, and a new reentrant UHV
window. Designers will also find standard flange-mounted moly-quartz
seals in flange diameters of 1.33, 2.75, and 3.375 in.
Bomco, Inc.
125 Gloucester Avenue
Gloucester, MA 01930
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