Dow Corning first introduced its silicon-based polymeric waveguide
prototyping technology in late 2004, and is now engaged in early
manufacturability and cost studies to apply the technology in printed circuit
board (PCB) backplane fabrication processes. Giorgio Anania, Chief Executive Officer of Bookham, will be joining an
executive panel to discuss the Bookham strategy and his views on trends and
opportunities within the marketplace.A.J.

prosource optis

The paper will be
presented by Dow Corning's senior research specialist Dr.
WHERE: Anaheim Convention Center, Anaheim, Calif.
Dow Corning (R) is a registered trademark of Dow Corning Corporation. Laura
Lunardo and Mr.
These statements are made pursuant to the safe harbor provisions of
the Private Securities Litigation Reform Act.

photopia ftg

Technical paper presentation at OFC Conference to demonstrate benefits of
silicon -based materials in waveguide prototyping

MIDLAND, Mich.dowcorning. SAN JOSE, Calif.

waveguide vectorial

The products offered by Dow Corning's Photonic Solutions group include Dow
Corning (R) OE-4000 Optical Coupling Gel, Dow Corning(R) OE-4100 Optical
Elastomer, and Dow Corning(R) OE -4200 Photonic-Grade Encapsulant.

NOTE: Bookham, New Focus and all other Bookham Technology plc product
names and slogans are trademarks or registered trademarks of Bookham
Technology plc in the U. Mr.

transmittance speos

Optical interconnects are seen as a successor to conventional electronic
circuits , which have inherent limitations in signal propagation and switching
capabilities. Jon DeGroot, Dow Corning senior research specialist
WHAT: Joint paper presentation on optical waveguide developments
WHEN: Friday, March 11, 2005; 9:30 a.
Dow Corning(R) Optical Elastomer is a one-part , high-purity, compliant,
transparent silicone elastomer.dowcorning.

Bookham to Highlight Expanded High Power Laser Diode Portfolio at Photonics West 2006

"

About Dynasil: Founded in 1960, Dynasil Corporation of America is
a fabricator of optical blanks from synthetic fused silica, fused
quartz and other optical materials.

prometric mmp

, Dow Corning Corporation will
announce its latest advances in waveguide prototyping, technology used in
developing optical interconnects for advanced telecommunication ICs, at the
Optical Fiber Communication (OFC) Conference 2005 next month in Anaheim,
Calif. To learn more about how Dow Corning combines the proven properties
of silicon-based materials with decades of processing and design expertise to
engineer technology solutions, visit http://www.
-- A range of linear bar array solutions (at 120W, 200W and 300W) for the
pumping of Nd:YAG lasers .

fresnel photopia

speos diffractive

-- 7W high power single emitter modules for various fiber laser
applications. Craig Dunham, Dynasil
President and CEO, had the following comments on the definitive
agreement: "During the due diligence process, the benefits of
combining Optometrics with Dynasil have continued to become apparent.

photopia prometric

OFC will be held March 8-11 in conjunction with the
National Fiber Optic Engineers Conference (NFOEC); Dow Corning's booth number
is 2589.

gaussian diffractive

Among the breakthroughs to be presented will be the development of a
novel micro-mirror molding technique using silicon-based polymers from Dow
Corning .
Dr.

Bookham, Inc.

gratings optis

"We see increasing demand for materials that are specifically designed for
optical use in a broad range of applications," said Stu Bush, market
development manager, Dow Corning Photonic Solutions. It is used for refractive index matching for silica-
to -fiber and other optical junctions in optical and fiber optic components. The company's optical
components , modules and subsystems are used in various applications and
industries, including telecommunications , data communications, aerospace,
industrial and military.com.

ftg interferometry

"
Dow Corning's optical products also will be displayed during the
conference.
-- A 30W maxichip from an 800 micron emitting area for high brightness
beam shaping or direct coupling into a standard 800 micron fiber
without additional optics. "This capability will enable our customers to
achieve more cost effective and higher performance solutions in the rod, disk
and fiber laser markets as well as pushing the boundaries for direct diode
applications.S.

Dynasil Announces Definitive Agreement to Acquire Optometrics LLC

This news release may contain forward-looking statements usually
containing the words "believe," "expect," or similar expressions.

spectrophotometric fresnel

Jon DeGroot. Many researchers believe silicon-based polymeric materials are
ideal for optical interconnect development because they offer high optical
transmittance, among other beneficial properties. "We are getting numerous
inquiries regarding their use in non-telecom devices, such as optical sensors
or automotive applications, and are working with a large customer set to help
them expand in these new markets. Additionally, a multitude of cure
chemistries is available to provide customers with flexibility in their design
options .

"We are building on our expertise to deliver high performance products in
the formats that our customers need," explained Dr.
"High power laser diodes will play a major role in the Bookham strategy
for 2006 and beyond," said Dr."
Bookham is also presenting two papers at associated symposium LASE 2006:
High brightness laser diode bars, and 9xx high power pump modules .

Business Editors

WEST BERLIN, N. Lunardo is expected to become Dynasil's CFO.

spectrophotometric vob

m. Dow Corning is
a global leader in silicon-based materials with shares equally owned by The
Dow Chemical Company and Corning Inc.

Building on the success of its high power laser diode bars and single
emitters, Bookham is unveiling a range of high performance, integrated
solutions, such as vertical stacks, linear arrays, and fiber-pigtailed
modules. Frank Denton, plan to continue to actively lead the
Optometrics business under two year, renewable employment contracts.

optis tilts

is a global leader in the design, manufacture and marketing
of optical components, modules and subsystems.
Dynasil has been a long term supplier to Optometrics and glass is a
key raw material for Optometric's products. Factors that would cause or contribute to such differences
include, but are not limited to, the factors detailed in the Company's
Annual Report or Form 10-KSB and in the Company's other Securities and
Exchange Commission filings, continuation of existing market
conditions and demand for our products.

optec vob

(Ballroom D)

During OFC, Dow Corning plans to discuss how its photonic solution can be
tailored to provide a complete "optical link" to fulfill a large variety of
device requirements.

Dow Corning(R) Photonic-Grade Encapsulant is a two-part, high-purity,
transparent soft silicone elastomer.com/photonics, or
email photonics@dowcorning. The full product portfolio will be making its US debut at the
Bookham stand (number 1727).4kW fast axis collimated 9xx nm vertical stack based on the Bookham
120W high power bars, which enables higher powers while using fewer
bars on microchannel coolers.

fresnel prometric

Dow Corning's Photonic Solutions include other advanced silicon -based
materials, device technologies and services designed to enable customers to
develop new applications with silicon-based materials and solutions in the
lightpath. Steve Turley, Chief
Commercial Officer at Bookham.
Optometrics LLC is a worldwide supplier of quality optical
components including diffraction gratings, lenses, thin film filters,
laser optics, monochromators, and specialized optical systems and
software.

tilts metec

com

Dow Corning (http://www.7 billion in annual sales are outside the United States. "Bookham is committed to providing
high power laser diodes to the key industrial and defense markets and, based
on the success we have seen in 2005, we see this portfolio as a major growth
driver for us in 2006 and beyond.bookham.----Dynasil
Corporation of America (OTCBB:DYSL ), fabricator of optical blanks from
synthetic fused silica, fused quartz, and other optical materials for
the semi-conductor, laser, space and optical components industries is
pleased to announce that it has signed a definitive purchase agreement
to acquire the operating assets and assume certain liabilities of
Optometrics LLC of Ayer, Massachusetts.

metec tilts

Dow Corning Makes Advances in Optical Interconnect Technology for Advanced Telecom ICs

It
is also used for waveguide protection and cladding, splicing , connecting, gap
filling and component assembly. More than half of Dow Corning's
$2. Highlights include:

-- A 2.
Optometrics' record of profitable growth, strong people and market
strength make the two companies an excellent fit that we expect will
increase the profitability of both companies .

interferometry tilts

Findings will be detailed in a technical paper titled Polymer Optical
Interconnect for Chip-to-Chip Communication, which was co-authored with
optical IC maker Gemfire Corporation, Fremont, Calif.
Dow Corning(R) Optical Coupling Gel is a two-part, high-purity, compliant,
transparent silicone gel.
"We are also investing further in our global sales organisation to ensure
that our customers in North America, Asia and Europe get the dedicated support
that they need," he continued., the business of Cierra Photonics Inc. Future results of
operations, projections, and expectations, which may relate to this
release, involve certain risks and uncertainties that could cause
actual results to differ materially from the forward-looking
statements.

transmittance interferometry

WHO: Dr.com) develops, manufactures and markets
diverse silicon-based products and services, and currently offers more than
7,000 products to more than 25,000 customers around the world. The product facilitates the scaling-up
of disk laser power and provides benefits for direct diode
applications. Bank
loan commitments have been received, due diligence is substantially
complete, and Dynasil is confident that other required financing will
be completed shortly.

interferometry vectorial

This elastomer provides a high degree of
refractive index shifting potential for planar silica-on-silicon optical
components.
(Nasdaq: BKHM), a leading provider of optical components, modules and
subsystems, is further extending its high power laser diode portfolio to the
industrial and defense markets at Photonics West later this month.
-- 50W standard 30% fill factor and 50W high brightness 20% fill factor
9xx nm bars with fast axis collimation, which provide tailored
brightness solutions for collimation and fiber coupling requirements. Anania. and other countries. The transaction is planned to close on March 8, 2005.
Additionally, Ms. We plan to continue to
grow Dynasil through similar acquisitions as well as the growth of our
optical materials businesses.

spectrophotometer commode

Its refractive index and high optical transmission make it
suitable for a variety of waveguide core and cladding applications. It is designed for the protection of
semiconductor lasers, photonic and electronic components on hybrid assemblies ., Bookham, Inc.
More information on Bookham, Inc. The
acquisition of Optometrics LLC is expected to double Dynasil revenues
in addition to contributing significantly to net income and cash flow .

diffraction spectrophotometric

These products can be tailored over a wide range of refractive
indices to meet the needs of specific applications, providing customers with a
variety of viable solutions. Many of the required optical and mechanical
properties can be customized through controlled synthesis to provide cost-
effective material and processing options. Since 2002, the company has acquired the optical
components businesses from Nortel Networks and Marconi, as well as Ignis
Optics, Inc., and
Onetta, Inc. The company has manufacturing facilities in the UK, US, Canada,
China and Switzerland; and offices in the US , UK, Canada, France and Italy and
employs approximately 2,000 people worldwide. is available at http: //www.

metec fresnel

, New Focus, Inc. The current Optometrics owners, Ms.