TriVista Series
- Newly Invented Triple Spectrometer Concept
- for Ultimate Flexibility
- Superior Performance
- Compact and affordable
Configurations
A variety of configuration enables a wide field of applications. Up to four input ports and four output ports provide a wide range of different system setups.
The additive or subtractive arrangement of the double monochromator stage can be selected by software. Switching between additive and subtractive mode is done inside the first two Stages without any need of an additional optic.
So the double monochromator stage can be used together with the last stage as a Triple system for Raman spectroscopy. Also it can be used as an excitation stage for fluorescence and photoluminescence and the emission can be detected by the last stage of the system.
To carry out pico- or femtosecond spectroscopy the second spectrograph may be mounted turned around 180°. So the first two stages compensate the different travel time of different wavelength.
Last but not least, the system enables to run three experiments at once.
All exits can be occupied by single channel detectors like photo multiplier, diodes and as well by multichannel detectors like CCD cameras or NIR/IR array detectors
Assembling of different detectors at a time leads to easy switch between scanning photon counting option
Models
Depending on the desired resolution the customer may choose between three basic systems. These are set up with imaging corrected monochromators with focal length of 500 mm and 750 mm.
The TR 555 assembled with three monochromators with 500 mm focal length. That configuration allows a maximum resolution of about 0.005 nm and has an aperture of f / 6.5 .
A combination of two 500 mm monochromators in the first two stages and a focal length of 750 mm in the
third stage is the TR 557. It offers a slightly better resolution in additive Mode but a 1.5 times better resolution in subtractive Mode.
Finally, three spectrometers of 750 mm focal length build the TR 777. In additive mode that instrument has a resolution like a single stage monochromator with a focal length of 2.25 meter. Also the aperture off /9.8 is moderate in comparison with an instrumentwith a focal length of 2.25 meter.
Description
The new triple spectrometer TriVista TR series is the most flexible system for scientific use on the market.
Three imaging corrected spectrometers of 500 mm and 750 mm focal length yield an excellent stray light rejection with best resolution.
For the optical design a patent application is initialized. The optical design enables to switch between additive mode and subtractive mode without an additional optic.
The standard working range of TriVista TR series is 250 to 1050 nm. Optionally it can be extended to 180nm and/or NIR range, even after installation.
Resolution and Stray Light Rejection
The best resolution and stray light suppression is connected to triple additive mode and a photon counting detector in the scanning mode. But also in multi channel detection mode with a CCD camera, the performance is not much worse than in the photon counting mode.
In triple additive scanning mode, a typical minimum distance to the Rayleigh line in relative wavenumbers is < 2 cm-1 with a resolution < 0.2 cm-1 at 500 nm.
About 1000 times faster measurements are possible with CCD cameras. In triple subtractive mode it still allows the detection of Raman spectra well below 5 cm-1 apart from the Rayleigh line with a typical spectral resolution of < 0.5 cm-1 at 500 nm, with 13 µm CCD pixel width.
Accessories
Many accessories are available like:
- Grating sets, optimized for UV, VIS and NIR
- Interchangeable grating turrets for up to nine gratings at each stage, calibrated into the spectrometers, and selected by the TriVista system software. Interchanging turrets is easy and reproducible.
- Additional entrance and exit slits
- Motorization of all slits
- Periscope and retro illumination accessories for optimum and easy sample adjustments
- UV to NIR entrance optics with holder for notch and other filters and also for polarization analyser or scrambler
- Macro Raman sample chamber for measurements on solids, liquids and gases, incorporating manyaccessories
- Adaptations for a wide line of microscopes and X-Y stages for mapping
- In-Situ Micro Raman assembly and fibre probes
- Fluorescence chamber, incorporating many accessories
- Stand and micro cryostats for sample cooling down to 3 K
- Fibre optic cables for light guides to the entrance slit are offered. Also special fibres for multiple trace spectroscopy are available
- Multi channel detectors like cooled intensified and non intensified CCD cameras and cooled InGaAs array detectors, …
- Cooled and non cooled single channel detectors like photomultiplier, germanium detectors and others with electronics like signal amplifiers, photon counter or lock-in amplifier, …
Also optical tables and lasers can be offered for complete setups.
Software
The intuitive software combines a user friendly interface with a maximum access to optimize the system to the sample requirements.
It includes:
- Control of all system functions like spectrometer grating turrets, switch between additive and subtractive mode, width of motorized slits, mirrors, …..
- Full synchronization of all stages in different modesl
- Online stage and slit movements during data acquisitions for optimized Low-Frequency- Raman measurements
- Data acquisition with multi and single channel detectors
- Control of motorized X-Y stages, autofocus, …
- Control of different modes for Raman, fluorescence, photoluminescence and other spectroscopy
- Also user defined accessories can be added on request
