| Hamamatsu Corporation is a leading manufacturer
of devices for generation and measurement of infrared, visible and ultraviolet
light. The company's unique corporate philosophy stresses the advancement
of photonics through extensive research, and yields products that are regarded
as the state of the art, including:
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Photomultiplier Tubes
The photomultiplier tube (or PMT) is a versatile device that provides
extremely high sensitivity and ultra-fast response. A typical photomultiplier
tube consists of a photoemissive cathode (photocathode) followed by focusing
electrodes, an electron multiplier and an electron collector (anode) in
a vacuum tube.
Hamamatsu offers the world's most complete line of head-on and side-on
PMTs from 3/8" to 20" in diameter. For help selecting the best
for your application e-mail or call our application engineers.
Uvtron
The Uvtron series of ultraviolet sensors of light in the spectral region
of 185 to 260 nm are ideal for flame detectors. They are used in fire alarm
systems and to detect corona discharge from high voltage power lines. For
help selecting the best for your application e-mail or call our application
engineers.
Image Intensifiers
Hamamatsu provides a variety of second-generation image intensifier
tubes and converter tubes. Spectral response of extended S-20 and solar
blind as well as an S-1 image converter tube. Hamamatsu also offers proximity
focused image intensifiers and X-ray image intensifiers. For help selecting
the best for your application e-mail or call our application engineers.
Light Sources
In contrast to light sources used for illumination, light sources used
for measurement applications must provide high stability and reliability.
Hamamatsu supplies a variety of stable light sources for photometric instrumentation.
For information on xenon lamps, mercury-xenon
lamps, deuterium
lamps, hollow cathode lamps, and other light sources please e-mail
or call our
application engineers.
Microchannel Plates
The MCP consists of million of very-thin, conductive glass capillaries
(6 to 25 micron meters in diameter, 12 micron meters in diameter and 0.48
in. in length for standard) fused together and slices in the shape of a
thin plate. Each capillary, or channel, arrayed in the direction of the
plate thickness, works as an independent secondary-electron multiplier,
thus forming a two-dimensional secondary-electron multiplier as a whole.
The MCP shows a high detection efficiency to electrons and ions; it is
also sensitive to a wide range of other radiation, including UV, VUV, and
soft X-ray photons, and even neutrons. In addition, the MCP offers many
advantages over conventional detectors: compactness and light weight, good
timing properties due to short length, high gain, excellent output pulse
height distribution, and two-dimensional imaging in conjunction with a
phosphor screen, etc. Applications of these MCPs have proved effective
and successful in various fields. For help selecting the best for your
application e-mail or call our application engineers.
FOP (Fiber Optic Plate)
Fiber optic plate (FOP) is optical device bundling optical fibers having
several micro-meters in diameter. It will transfer the light and image
with high efficiency and low distortion, which allows it as the better
replacement of optical lens. In addition, it has no necessity to consider
the focal point like optical lens, which can make the optical design simple
and compact. Hamamatsu will offer the variation in the high definition
type having minimum fiber size of 3 micro-meters and in the magnification
size of 3:1 maximum for tapered type.
Photodiodes
Hamamatsu offers a variety of photodiodes, including silicon, PIN silicon,
GaAsP, GaP and avalanche photodiodes. High quality photodiodes are deigned
to meet various requirements of general and critical applications. For
help selecting the best for your application e-mail or call our application
engineers.
Position Sensitive Devices
The silicon PSDs consist monolithic, PIN photodiodes with either one
or two uniform, resistive surfaces. Compared to the discrete-element detectors,
the PSDs have many advantages such as high position resolution, fast response
speed and simple operating circuits. In addition, position data is independent
of the focus of the light spot on detector. For help selecting the best
for your application e-mail or call our application engineers.
Light Emitting Diodes
The LED (light emitting diode) chip has an internal P-N junction, and
an electrode is provided on each surface of the chip to make ohmic contact.
The P-N junction is formed by epitaxial growth using the substrate of a
GaAs crystal. The crystal's internal structure differs depending on the
emission wavelength to be used, radiant power and cutoff frequency. For
help selecting the best for your application e-mail or call our application
engineers.
Electron Multipliers
Electron multipliers (also called ion multipliers) are specially designed
for the detection and measurement of electrons, charged particles such
as ions, VUV radiations and soft X-rays. Hamamatsu electron multipliers
have high gain and low noise, making them suitable for the detection of
very small or low energy particles by using the counting method. They are
well suited for mass spectroscopy, field ion microscopy, and electron or
VUV spectroscopy such as Auger spectroscopy, AES and ESCA.
Each type has Cu-BeO dynodes connected by built-in divider resistors (1M
ohm per stage) and is supplied in an evacuated glass bulb. The first dynode
can be replaced by a photocathode of Cs-I, K-Br, etc. for use in VUV photometry.
Mercury-Xenon Lamp
A Mercury-Xenon Lamp is a designed to provide high radiant energy in
the ultraviolet range. Since an optimum mixture of mercury and xenon gas
is enclosed, this lamp offers the characteristics of both xenon lamps and
super-high-pressure mercury lamps. For example, the spectral distribution
of a mercury-xenon lamp includes a continuous spectrum from ultraviolet
to infrared of the xenon gas and strong mercury line spectrum in the ultraviolet
to visible range. In comparison to super-high-pressure mercury lamps and
xenon lamps, the radiant spectrum in the ultraviolet range is higher in
intensity and sharper in width. The Mercury-Xenon Lamp also features instantaneous
starting and restarting, which are difficult with conventional super-high-pressure
mercury lamps, thus making them an excellent choice as ultraviolet light
sources.
Hamamatsu produces Super-Quiet Mercury-Xenon Lamps using the same high-performance
BI cathode as the one used in the Super-Quiet Xenon Lamps, thus allowing
high stability and long life.
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