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CATALOG INDEX
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- [ Fourier Transform
Infrared Spectrometer,
Model FT/IR-400 series ]
- [ Fourier Transform
Infrared Spectrometer,
Model FT/IR-600 series ]

The new FT/IR-400 series are the latest IR spectrometers developed by Jasco in response to the technical requirements and limited budgets of the modern laboratory. The new FT/IR-400 series models feature a very compact and stable optical bench with specifications you would expect from larger more costly instruments. The FT/IR-400 series consists of three unique models - all fully PC controlled via comprehensive software running under Windows 95.

- The model FT/IR-410 is a cost effective 0.9cm^-1 resolution optical bench equipped with a KBr beamsplitter. The FT/IR-410 is the right choice for the majority of IR applications.

- The model FT/IR420 features more complex optics and electronics resulting in increased sensitivity for the discriminating researcher. A Csl beamsplitter can also be supplied as an option.

- The model FT/IR-430 offers 0.5cm^-1 resolution with excellent sensitivity for varied and complex applications. A Csl beamsplitter can also be supplied as an option.

Innovative light source
The FT/IR-400 series uses a patented high intensity light source with much higher black body emission than conventional nichrome elements. Higher black body emission equates to better sensitivity over the entire wavenumber range, particularly in the near IR range.

Sealed Interferometer
The FT/IR-400 series incorporates a compact, 45E incidence angle Michelson interferometer. The high intensity light source is directly focused on the interferometer by an off axis parabolic mirror, without the use of energy sacrificing apertures. The interferometer is completely sealed and features permanently aligned corner cube mirrors ( KBr exit window is standard, KRS-5 type can be supplied on request ), as well as purging facilities and a stable mechanical bearing drive with variable speeds to match detector frequency response.

Small beam size in the sample compartment
A small beam size at the focal point of the FT/IR-400 series allows the use of virtually any type commercial FT/IR sampling accessory. The sample compartment can be equipped with an optional purging facility which is standard in the Csl versions.

Detectors
The FT/IR-400 series are supplied with a thermally insulated DLATGS detector and elliptical focussing mirror. A liquid nitrogen cooled MCT detector with computer controlled switching mirror can be supplied as an option.

Far infrared versions
Both FT/IR-420 & 430 can be supplied with Csl beamsplitter extending the wavelengh range down to 220 cm^-1.

Actual improvement from high-intensity light source

The high-intensity light source designed by JASCO offers practically better signal to noise and sensitivity when compared to a conventional nichrome light source.

Figure 1 shows the single beam spectra of background (air) comparing the new   light source to the conventional nichrome element. The upper spectrum was obtained with the new light source, and the lower window was obtained with a conventional nichrome light source.

Figure 2 shows the optical diagram of a typical FT/IR spectrometer. The FT/IR-400 series incorporates a unique optical layout which minimizes the number of energy absorbing mirrors and eliminates the use of apertures which result in increased sensitivity.

Figure 3 shows the light paths for optional accessories such as the MCT detector and IR microscope. These accessories are field installable.

Actual improvement from smaller beam size

The small beam size of the FT/IR-400 series contributes to the excellent signal-to-noise ratio shown in Fig. 4. The illustrate JASCO’S technological improvements, a 1mm diameter tablet of KBr and small amount of ascorbic acid (vitamin C) was measures in the transmittance mode with the new FT/IR-420 and the previous JASCO model FT/IR-420, and the lower spectrum was obtained with a previous Model FT/IR-300E. These spectrum clearly indicate the increased sensitivity of the new Model FT/IR-420 over the entire wavenumber range as well as to show the possibility of microsampling without the use of any optional focusing accessory.

Data processing / Handling

• PC: 32 bits (IBM-AT compatible PC)
• FFT processing: 32 bits processing by built-in RISC CPU
• Communication with PC: SCSI
• Spectral display: CRT color display
• Standard software: Operative under Windows 95
  • Data acquisition: Parameter setting, sample name inputting, monitoring for setting, real-time monitoring
  • Data correction: Smoothing, baseline correction, CO2 elimination, if necessary), ATR correction
  • Peak processing: Peak detection, peak height, peak area, data dump
  • Processing: Arithmetice operation, derivatives, Spectral conversion, IF conversion, %T/ABS conversion, KM conversion, KK conversion, Curve fitting, Deconvolution , FFT noise reduction, spectral subtraction, W.N./W.L. conversion, JCAMP conversion, GRAMS conversion, ASCII conversion
  • Others: Comments editing, data cut, data concatenation, data save
• Accessories: Attenuated Total Reflection (ATR), Infrared Reflection, Infrared Polarization, Polarizer, Micro-20 Infrared Microscope, Diffusive Reflection, Sample shuttle
• Optional software: Quantitative analysis, Library search, Time course, Validation

Standard compositions
1 Main unit, 1 Standard software package, 1 instruction manual, 1 pin for setting accessories, 1 power cable, 1 polystyrene film.