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photronics
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Photronics/Photonics

Wafer Fabication

IC Assembly

 TriVista     

Designed to solve critical spectroscopy applications requiring high-resolution and stray light reduction, PI's flexible TriVista system maintains a wide spectral working range. Its powerful software combines an intuitive user interface with maximum access for optimizing the system to sample requirements. The working range spans from 250 to 1050 nm with a typical spectral resolution of < 0.02 nm (all over the range) or 0.2 cm-1 (referred to 500 nm) when utilized with the Spec-10 CCD camera system.

Extreme stray light rejection allows Raman spectra well below 10 cm-1 apart from the Laser’s Raleigh line. Optionally, Stokes and Antistokes can be acquired simultaneously. Additive or subtractive operation are mere keyboard commands with this state-of-the-art design, which also features multiple input/output options and the ability to scan for photon counting. The sample excitation and illumination can be done manually or automated by the integrated system. A sample chamber is available for solid and liquid samples, including polarization options.

A fiber optic transfer is offered along with a multiple entrance option which permits the connection of as many as three sources simultaneously. Multiple detector outlets ensure the use of several detectors, as well as the potential for future applications which require a single or double stage system rather than a triple. This versatile design can be utilized in numerous applications, making it a popular system in a wide spectrum of industries.
Download TriVista product flyer

Features and Benefits

  • Unbeatable Micro and Macro Raman/Luminescence solution
  • Variable bandpass tunable filter
  • Subtractive or additive operation
  • High-stray light rejection
  • Modular and flexible
  • NEW multipurpose sample chamber
  • Easy assembly/disassembly for other configurations
  • Excellent price performance ratio
  • Kinematic grating mounts and motorized slits
  • Multiple exit ports and input ports
  • Stokes/AntiStokes accessory
  • Supports CCD, ICCD, InGaAs Arrays, PMT's, and photocells



Analytical Multipurpose Sample Chamber

For liquids, gases and solids. Features x, y, z sample movement; multipass mirrors; retro collecting mirrors; f/2 UV entrance optic; holder for polarizers; analyzer interference filters; scramblers; quarter-wave plates; holographic notch filters; iris and slit option for stray light suppression and a goniometry head option.

Powerful Software

The TriVista's software allows configuration of all parameters and scanning data acquisition. It is also integrated into WinSpec 32, Roper Scientific's spectroscopy software for PI/Acton's CCD detectors.

Spectrometers

The TriVista system consists of three imaging corrected PI/Acton Research SpectraPro-2558, which provide 500 mm focal lengths in each stage, or two SpectraPro 2558 plus one SpectraPro 2758 in the final stage with a 750 mm focal length. As a result, the system delivers superb resolution with a stray light suppression of 750 mm focal length at all stages. The critical slits between the stages are motorized, which allows transferring a wide spectral range to the third stage of the spectrograph. All systems include a fully-automated fluctuating capability from an additive pre-stage to subtractive stage, which alternatively optimizes for single-point detector, or CCD. The ultimate resolution and stray light suppression is connected to additive and single point. A typical minimum wave number is 3 cm-1 at 0.05 cm-1 resolution. The CCD allows about 1,000 times faster data at same signal/noise-ratio (S/N-R). All those numbers need to be tailored to the expected requirements.

The TriVista application calculates the best grating combination of the system according to the researcher’s demands. Its outstanding flexibility allows for frequent upgrades and changes, with every spectrometer stage carrying up to three gratings at a time. As many as nine gratings at three turrets in each stage can be calibrated into the spectrometers and selected by the TriVista system software.

Interchanging the TriVista's turrets is easy and reproducible. The CCD camera can be hooked to the exit of the first stage (single spectrograph), at the second (double additive spectrograph), or its main position: the exit of stage three. The exit slits will open up to 3 mm and the CCD's field-of-view can be enlarged to 30 mm wide and 14 mm high. Gratings are available up to 3600 l/mm for < 480 nm, 2400 l/mm at up to 640 nm, 1800 l/mm at up to 940 nm, and 1200 l/mm or more. The maximum resolution depends on the selected gratings, the focal lengths of the stages, and the detector's output slit, or pixel size of the CCD. 
 

Typical CCD measurement in standard subtractive mode with gratings of 1800 l/mm in all stages.The collection is starting close to 0 cm-1. Sample is L-Cystine, excited at 632.8 nm by a 5 mW laser.

CCD Detectors

The TriVista's liquid nitrogen (LN) cooled back-illuminated CCD system delivers the highest performance of any detector available. This revolutionary design can be equipped with several product families. The Spec-10 series features detectors with 1340 x 400 (26.8 x 8 mm) pixel size, each with a 20 µm geometry. Quantum efficiency (QE) reaches above 90% in the green-red region with noise as low as 2 electrons. Numerous versions of the SPEC -10 system permit increased UV or NIR and smaller pixels (1340 x 100 at 26.8 x 2 mm). In situations where time resolution in the nanosecond or microsecond range is required, the PI-MAX line of gated intensified CCD systems should be used.

Single Point Detectors

A selection of detectors is available for efficient measurements at single data points, ranging from cooled InGaAs solid state in the NIR to photon counting photo multiplier tubes in the UV-Vis. These detectors utilize extremely small slits in all three stages, vastly superseding the stray light suppression and resolution of CCD detection systems. Because a spectrum takes a long time to cover, operators should use the single-point system for verification over short intervals and for capturing data extremely close to the Raleigh Line (typically below 5 cm-1).