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Theta 2 Theta Advanced


Model: HO-ED-TH-05

The need for reliable measurement techniques for optical characterisation of thin films is growing. HOLMARC’s Theta 2 Theta Spectrophotometer is a useful tool for characterizing the absorption, transmission and reflectivity of a variety of scientifically important materials, such as pigments, coatings, windows, and filters. Automated theta 2 theta goniometer tool is used for variable angle spectroscopy, measuring absolute reflectance and transmittance of samples at different angles for characterization of the optical or electronic properties of materials. Reflectance measurements can measure color of a sample or examine differences between objects for sorting and quality control.

This advanced spectrophotometer gives precise measurements of spectral parameters such as reflection, transmission, and optical density in all spectral range of UV, VIS and NIR. Spectral transmission and 0 reflection measurements at any desired angle with a resolution of 0.5 can be carried out with this spectrophotometer. Two reserch models are available for angular photometric measurements HO-SPA-1990P and HO-SPA-3411D. The model:HO-SPA-1990P is a scientific grade photometer equipped with high sensitive photo multiplier tube, while Model : HO-SPA-3411D uses Si Photo diode as detector. Angles for illumination and measurement can be set independently. The system has provision to add motorized polarizer and analyzer to get the polarization curve of the sample at various angles.

The device employs classic Czerny - Turner monochromator design, which ensures low stray light. It uses 1200 lines/mm blazed holographic grating as the dispersion element, providing high wavelength resolution. It also employs a sigma delta ADC of 16 bit resolution, for photometric measurements. Customized accessories are available to address individual application requirements.


    Specially designed for optical characterization

    Ideal for reflectance, transmission, absorption and optical density measurements

    Interchangeable holders for solid, liquid and thin film samples

    Wide range of accessories such as polarizers, filters etc

The software developed for this instrument has facilities for setting up and calibration in addition to scanning and manual readout. Scanning is possible for a desired wavelength range as well. This feature can save time whenever full wavelength range scan is not necessary. The software saves and displays the data acquired on MS Excel sheet. This helps to plot graph with ease whenever required.

A variety of accessories are included, such as test tube holder, temperature control holder, long path length cuvette holder and multiple cell holder. These accessories can be used to enhance various application needs.

Model HO-SPA-3411D HO-SPA-1990P
    Bandwidth 1 nm 0.5 nm
    Optical System   C-T monochromator, 1200 l/mm holographic grating
    Wavelength Range 340 ~1100 nm 190 ~ 900 nm
    Photometric Method   Transmittance, Absorbance, Concentration
    Wavelength Accuracy   ± 0.5 nm
    Wavelength Repeatability   ± 0.1 nm
    Absorbance Range   - 2 ~ 2 Abs
    Photometric Accuracy   ±0.002 A (0 ~ 0.5 A), ±0.004A (0.5 ~ 1 A), ±0.3% T
    Photometric Repeatability   ≤0.001 A (0 ~ 0.5 A), ≤0.002A (0.5 ~ 1A ), ±0.1% T
    Stray Light   ≤0.05% T
    Baseline Straightness   ± 0.002 A
    Detector Si-Photodiode PMT
    Light Source Quartz Halogen Lamp Xenon Arc Lamp
    Cell Holder   Two-position 10 mm standard cuvette holder
    Theta 2 Theta Measurements   Goniometer for Angular Measurements

Type   :   Theta 2 Theta Measuring Stage

Sample Holder   :   Up to 50x50mm size, Custom Size Available

Angular Measurement Range   :   30° - 180°

Positioning Resolution   :   0.5°

    Control Mode   PC control (Software   :   PhotoANALYTE-G)
    Dimensions (LxWxH) mm 606x352x135 606x352x230

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