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Spectrometer for measuring moving sample material and the method

一种样品材料、分光仪的技术，应用在测试移动的板、光谱测定法/分光光度测定法/单色器、测量装置等方向，能够解决没有办法辐射均化、分光仪不是最优、背景技术不符合典型在线测量的要求等问题，达到高速度、高信噪比的效果

Inactive Publication Date: 2010-08-11
HONEYWELL INT INC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If one considers online spectroscopy on a sample plate or sample belt moving at a certain distance, this invention also has several drawbacks: there is no way to effectively homogenize the measured radiation, in which case sample movement and distance variations May cause artifacts in the measured spectra
Therefore, the spectrometer is not optimal for measurements on fast-moving inhomogeneous materials, since different wavelengths are recorded at different points of the sample, which causes "moving-sample noise" in the measured spectrum
[0010] The background art summarized above does not meet the requirements of typical in-line measurements for process automation applications

Method used

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  • Spectrometer for measuring moving sample material and the method
  • Spectrometer for measuring moving sample material and the method
  • Spectrometer for measuring moving sample material and the method

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Embodiment Construction

[0032] figure 1 A preferred spectrometer according to the invention is presented. A radiation source 1 and a modulation device 2 are shown for producing time-modulated radiation on a sample 3 . A typical scheme may use a halogen lamp as the radiation source, and a motor designed with blades or holes to drive a chopper wheel to sequentially interrupt the beam and produce time-modulated radiation at a modulation frequency, which for a linear detector array 12 and signal processing electronics 14 are optimal. Furthermore, there is an optical device 5 for collecting back-reflected or transmitted radiation from the actual measurement region 4 in the illuminated region 3 on the sample. In effect, the optics represent the radiation present on the sample into the input of the optical light guide 6, thus minimizing any losses in the radiation (similar to the brightness of visible radiation). The optical device 5 may be realized as a suitable lens or lens system. More preferably, th...

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Abstract

The invention relates to an optical or infrared (IR) spectrometer suitable for on-line measurements for industrial, agrculture, field, commercial and other similar applications. Optical spectrometers are very useful for various analytical measurements. On-line operation is needed for obtaining real-time information, which is useful e.g. for process automation and quality control needs. The invention is based on optical design optimized for measuring moving samples (3) at a distance and comprises a light guide (6) for signal homogenisation, a linear varible filter (11) for defining multiple measurement wavelengths as well as a linear detector array (12) for detecting optical signals relating to the different wavelengths. There are means (13) for cooling and stabilizing the operating temperature of both the linear detector array (12) and the linear variable filter (11), while the spectrometer is operating in variable enviromental conditions. Thanks to the optical signal chain designed to maximize the radiance at the detector, the proposed spectrometer can provide high signal-to-noise ratio and high speed.

Description

technical field [0001] The present invention relates to an optical or infrared (IR) spectrometer suitable for on-line measurement in industrial, agricultural, field, commercial and other similar applications. Optical spectrometers are useful for a variety of analytical measurements. On-line operations are required to obtain real-time information, which is useful, for example, for process automation and quality control needs. [0002] More specifically, the invention is based on an optical design optimized for measuring moving samples at a distance, and the invention includes light guides for signal averaging, linearly variable filtering for defining multiple measurement wavelengths detector, and a linear detector array for detecting optical signals associated with different wavelengths. Background technique [0003] After recent developments, small spectrometer modules are available based on a fiber optic input connection that supplies light to a spectrograph (where the op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/26G01J3/28G01N21/85G01N21/86
CPCG01N21/31G01J3/0218G01J3/0232G01J3/0286G01J3/2803G01N21/85G01J3/26G01J3/02G01N21/86
Inventor J·马利南K·卡塔贾S·基维H·瓦萨马R·库塞拉
Owner HONEYWELL INT INC
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