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| SMART HEADS | |
| SMART DISPLAYS | |
| BEAM ANALYZERS | |
| - BeamStar FX series |
| - BA500 | |
| SPECTROMETERS | |
| OEM
& SPECIAL SYSTEMS |
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| - Oem Heads | |
| ACCESSORIES | |
| COMPUTER OPTIONS | |
| NEW PRODUCTS | |
| BeamStar FX | ||||||||||||||||||||||||||||||||||||||||||||||||||
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| Firewire CCD Laser Beam Profilers |
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BeamStar FX 66 2/3" Camera |
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Features
 Ophir BeamStar firewire CCD beam profilers provide all you need for beam profiles of both pulsed and CW lasers from µW to Watts. The system consists of a camera, filters, laptop or PC card, software and detailed instructions. Ophir BeamStar CCD beam profilers have hardware and software features designed to handle pulsed lasers seamlessly. The BeamStar FX 33 and FX 50 series have a trigger input to synchronize with the trigger output from your pulsed laser. In addition, only the Ophir profilers have an exclusive optional photodiode trigger that picks up the scattered laser light and automatically synchronizes with the laser pulses even for nanosecond or shorter pulses. Never has beam profiling been so easy and accurate. BeamStar FX cameras have automatic continuous shutter and gain control for most accurate measurement and ease of use. The cameras also come with a set of filters, which can easily be mounted and dismounted from the camera. The filter combinations together with the automated gain and shutter control allow effortless measurement of powers from microwatts to watts. There are a number of accessories available with the BeamStar cameras: The BeamStar U accessory: This is a highly efficient imaging system that converts UV radiation into visible and reduces the beam by 4x, allowing UV beams up to 30mm across to be viewed in the spectral range from 193 to 360nm. The exclusive Ophir sensitization plate allows a dynamic range of up to 10,000:1 and energy densities up to 500mJ/cm². The 4X beam expander This is an expanding telescope that images any beam or source at 8mm from the end of the expander onto the BeamStar CCD while enlarging the image 4X. The expander allows the use of the standard BeamStar filters so as to accommodate the camera to a wide range of source intensities. With the beam expander, the effective resolution of the BeamStar is as good as 2µm. Various filters and beam splitters are available for reducing the intensity of higher power/energy beams. These allow measurement up to tens of watts. Among the filters are a sliding, continuously variable filter. The BeamStar software has a wealth of beam analysis features such as:
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| Examples
of Software Features Main Screen Functions |
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Description
of Some Other Control Pages  Top of Page |
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| Beam
Wander Screen The BeamStar FX has a sophisticated and easy to use beam wander function allowing you to track and record laser beam position with time. |
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 Top of Page Other BeamStar Products BeamStar U attachment for UV lasers  |
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| The BeamStar U imaging system converts UV radiation into visible and reduces the beam by 4x, allowing UV beams up to 30mm across to be viewed in the spectral range from 193 to 266nm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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of Page Attenuators and Beam Splitter The BeamStar FX cameras come with a set of three screw on neutral density filters. These filters are of high quality optically flat glass and are angled to prevent interference effects. Additional filters can be ordered if desired. In addition, a continuously variable filter is available if more control is needed or for even less interference effects than the screw on filters. If more attenuation is needed, beam splitters can be added in addition. The UV grade fused silica wedge beam splitter fits onto the BeamStar FX and additional wedge beam splitters may be mounted to the first one at right angles as shown. Each beam splitter reduces the intensity of the beam by ~20 times so if the BeamStar FX and its filters can operate with lasers typically up to ~1 Watt, with one beam splitter it can operate up to ~20 Watts and with two beam splitters up to ~400W!. Note that even three beam splitters can mounted in series in this fashion. The beam splitters are mounted over the fixed or variable attenuators with a simple fastening ring and can be oriented in any direction with the beam coming from right, left up or down. The Beam Splitters will operate for wavelengths from 190nm to 2500nm. The wedge angle of 10 degrees insures that only the reflection from the front surface will appear on the camera with no double images. The user must insure that there are beam stops for the transmitted and reflected beams.  Top of Page BeamStar FX 1500 The Ophir BeamStar FX 50 1500 CCD beam profiler provides a cost effective solution to beam profiling in the spectral region 1480-1600nm. It is based on the standard BeamStar FX 50, where in this case the CCD is coated with a conversion coating that makes the infrared region to 1600nm visible. Since the BeamStar FX 50 1500 is essentially the same camera as the standard BeamStar with a conversion coating, it has the same hardware and software features described above. Example of beam profilers  The two examples above show the line and sum beam profiles of a ~ 0.5mm 1550nm beam at a distance from a SM fiber. Note that in the line profile, the profile is jagged because of the variations in sensitivity of the conversion coating from grain to grain. In the sum profile, the curve is much smoother since the sum profile averages out these variations. The response of the detector is nonlinear, with the output varying as the square root of the input. A software gamma correction algorithm linearizes the output profile. Top of Page 4X Beam Expander The BeamStar CCD cameras are available with the 4X Beam Expander attachment. This is an expanding telescope that images any beam or source at 8mm from the end of the expander onto the BeamStar CCD while enlarging the image 4x. The expander allows the use of the standard BeamStar filters so as to accommodate the camera to a wide range of source intensities. With the beam expander, the effective resolution of the BeamStar is as good as 2 to 3um. |
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| Shown is an image of the
tip of a single mode fiber of 9µm diameter. The beam width as measured
on the profiles shows 4X the actual size so we see a resolution of
~ 2µm. With parallel beams, there may be coherence effects that limit
the resolution to less than converging-diverging beams. Top of Page |
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Note (1):Some vendors claim as much as 14 bit dynamic range but this usually refers to the A/D card dynamic range and not the total system dynamic range including the camera which is usually on the order of 55 - 60dB.  BeamStar FX-1500 spectrum Top of Page |
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| Ordering Information
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| © 2004 Ophir Optronics | Site Map | Contact Us | Last modified: 7 August, 2007 | |||
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