Date:      Tuesday 16-17 October 2013

Where:   Ricoh Arena, Coventry

Stand:     D15

Photonics Technologies will be displaying the DUMA test equipment for laser beam analysis, also showing a laser Power Controller for laser intensity stabilisation.

Register in advance - please complete the  on-line form. There is no fee to attend. Sign up now for this free opportunity to broaden your knowledge in the world of photonics.For information on the Photonex event, visit http://www.photonex.org/.

Currently there are  three types of products for the UV:

• BeamOn UV CCD beam profiler
• Beam Analyzer Knife Edge Beam Profiler for the UV
• SpotOn CCD UV for positioning applications.

“We would like to offer to UV source users a variety of products that will cover beams from down to 0.5µm and up to 9mm. More Duma Optronics products will have the UV imaging ability soon. We see worldwide demand from our customers and we intend to push the limit to provide it”, says Shmulik Barzilay, VP Sales and marketing.

Duma Optronics is offering high- End CCD beam profilers along with patented Knife-Edge measuring instrumentation and unique alignment tools.

As part of the company last development they recently launched a few new products:

• BeamOn HR with motorized filter wheel
• Electronic Autocollimator

See our video on Youtube by clicking on the following link.

In today’s engineering world many new applications of material processing using lasers have emerged. In particular fiber laser technology has made a dramatic progress in output power and beam quality. Kilowatts of power have been demonstrated and implemented for various applications such as cutting, welding, ablating and others. The advantages of fiber lasers are their high power mechanical stability and good beam quality; however beam quality and beam profile has to be periodically checked.

In general, there are many difficulties in checking beam quality especially at the focal point, where densities will exceed 50KWatt per square cm. On one hand those energies are capable to melt and destroy most known materials, while on the other hand measuring a focused profile is the most significant measurement.

Recent development has been made in the area of accurate beam sampling, distortion free. A carefully designed Beam Sampler such as the one offered by Duma Optronics can sample about 1/100000 without distortion, while preserving the original beam polarization. Picture 1 shows a typical application of a laser welding line used on the Automotive industries.

Picture 1: Knife-Edge beam analyser with a beam sampler for high power laser measurements (up to 1.5kW)

SAM3 attachment can be used with thefollowing measuring heads: BeamOn, BeamAnalyzer, BeamOn HR, μBeam, SpotOn CCD.See configuration of SAM3 with BeamAnalyzer measuring head in picture 2.

For atomic absorption spectroscopy to able to measure low concentrations of aerosols and molecules in a mixed gas it is necessary to increase absorbance by having a long path length through the sample. Herriott type cells multiply the effective path length through a gaseous medium and thereby increase absorbance. This improves an absorption spectrometer’s resolution and sensitivity but keeps the test instrument light and small.

Photonics Technologies’ Herriott type cells have a total optical path of 30m and are suited to infrared absorption spectroscopy and other applications which require a long interaction path with a gaseous sample. Applications include gas monitoring in the laboratory or industrial environments, for spectrometer manufacturers and end user researchers wishing to develop or build a near-infrared absorption spectroscopy system.

The design and materials used to construct  these gas cells make them very compact and robust and this, combined with the stability of the optical configuration, makes them ideal for measurements in laboratory and field applications.

The Herriott cell is manufactured to ensure uncompromised performance. Within a glass cell, two spherical concave mirrors face each other and the incident laser beam enters the cell through a hole in one mirror then undergoes 73 reflections, describing a circle of spots on each mirror surface, before exiting through a hole in the second mirror. The beam enters the cell in the horizontal plane, whilst the output beam exits at a higher angle which ensures a clear separation between input and output beam, permitting accurate absorption measurements even in cases of incorrect alignment or poor focussing.

Two models of Herriott Type Cell are offered, CMP-30 and CMP-30 HP, the latter is strengthened for high pressure applications with the Pyrex tube of the CMP-30 standard being replaced by a steel tube. It also incorporates a high pressure release valve and can be used for applications up to 5 atm.

The cells are resistant to the most common chemicals. Materials in contact with the gas are Pyrex and BK7 glass, stainless steel, CaF2, Gold, Viton and Teflon. Gas inlet and outlet ports at both ends of the cell allow for examination of flowing gases. When ‘room air’ measurements are to be performed the Pyrex glass pipe can be removed in-situ without dismantling the cell.