CN201993313U

CN201993313U - Novel Raman spectrum detecting device

Info

Publication number: CN201993313U
Application number: CN2010206794613U
Authority: CN
Inventors: 陈荣; 冯尚源; 林居强; 陈冠楠; 李永增; 黄祖芳
Original assignee: Fujian Normal University
Current assignee: Fujian Normal University
Priority date: 2010-12-25
Filing date: 2010-12-25
Publication date: 2011-09-28
Anticipated expiration: 2020-12-25

Abstract

The utility model relates to a device obtaining the Raman spectrum of an object by adopting different polarized lights to excitate the object. The device is especially suitable for differentiating formations of objects by detecting Raman signals of the different objects. The detecting device comprises a Raman spectrum excitation light source, a polarized excitation combination device, objects to be tested, a polarized reception combination device, a Raman detecting system and a Raman spectrum signal processing and displaying system. A light emitted by the excitation light source can produce an excitation light, a circularly polarized light, a linearly polarized light and a non-polarized light of different polarization conditions through the polarized combination devices. The objects to be tested produce Raman signals by excitation of lights of different polarization conditions, Raman spectrum signals of different polarization conditions are separated from the Raman signals through the polarized reception combination device, and the Raman spectrum signals are processed and displayed. The Raman signals obtained by the novel Raman spectrum detecting device can be used for precisely analyzing and differentiating components of the objects.

Description

A kind of novel Raman spectrum pick-up unit

Technical field

The utility model relates to a kind of different polarization excitation source that adopts object is carried out the device that Raman spectrum detects.This device is specially adapted to test and obtain the difference of the raman spectral signal of various different objects, to differentiate the different structures of matter or composition.

Background technology

Raman spectroscopy can be from the formation of check and analysis material on the molecular level, and it has directly, advantage such as harmless, quick, and this technology has been widely used in fields such as chemical industry, commodity inspection, environmental protection, biomedicine.At present, the excitation source that Raman spectrum detector commonly used adopts generally adopts nonpolarized light, or single polarized light excites, the Raman spectrum of thus obtained measured object still can not demonstrate fully the subtle change of molecular structure in the material, exploring new Raman spectrum detection technique, is the important research direction of current relevant scientific and technological circle.

Summary of the invention

Task of the present utility model just provides the different polarization technology of a kind of comprehensive employing, particularly adopts the Raman spectrum pick-up unit of circular polarization technology as excitation source.

Task of the present utility model is achieved in that pick-up unit excites composite set, testee, polarization to receive composite set, Raman detection system and raman spectral signal processing by Raman spectrum excitation source, polarization and constitutes with display system.Wherein polarization excites composite set to be made up of the some optical polarizers that can produce the different polarization state light, but these polaroid monolithics or multi-disc enter light path, thereby produces the different polarization state light, comprises circularly polarized light, linearly polarized light, nonpolarized light; Polarization receives composite set to be made up of the some optical polarizers that can obtain the different polarization state light, but these polaroid monolithics or multi-disc enter light path, thereby obtains the different polarization state light, comprises circularly polarized light, linearly polarized light, nonpolarized light.

The Raman spectrum excitation source arrives before the testee, earlier excite composite set by a polarization, with testee on the polarized excitation light irradiation objective table that produces different conditions, exciting composite set rear polarizer exciting light by polarization can be circularly polarized light, linearly polarized light or nonpolarized light.Testee produces raman spectral signal under the exciting of different conditions polarized excitation light, this spectral signal scattering enters polarization and receives composite set, this installs the raman spectral signal of separable acquisition different conditions polarized light, this signal arrives the Raman detection system, arriving raman spectral signal at last handles and display system, thereby can obtain by the different polarization optical excitation, the Raman signal of the testee that separates by different polarization again is with the Accurate Analysis that realizes the testee material is constituted.

Described polarization excites composite set to comprise a rotatable filter wheel with four mounting holes, linear polarizer, left sheet, circular polarizing disk or right circular polarizing disk are placed in respectively wherein on three mounting holes, have the filter wheel of four mounting holes by rotation, can produce the exciting light of linear polarization, left, right circular polarization and unpolarized four kinds of states.This filter wheel has been realized having guaranteed the stability of experiment condition to greatest extent to carrying out in real time between the optical element of different passages, switching easily, has been significantly reduced experimental error.

Describedly comprise a rotatable filter wheel with two mounting holes.Two mutually perpendicular linear polarizer of polarization angle are placed in respectively on two mounting holes, have the filter wheel of two mounting holes, the raman spectral signal of separable acquisition different polarization state by rotation.This filter wheel has been realized having guaranteed the stability of experiment condition to greatest extent to carrying out in real time between the optical element of different passages, switching easily, has been significantly reduced experimental error.

Described polarization excites composite set and polarization to receive composite set and can use simultaneously or use separately according to the experiment needs.

Description of drawings

Fig. 1 is that accompanying drawing is a principle schematic of the present utility model.

Among Fig. 1, the 1st, excitation source; The 2nd, polarization excites composite set; The 3rd, testee; The 4th, objective table; The 5th, polarization receives composite set; The 6th, the Raman detection system; The 7th, raman spectral signal is handled and display system.

Embodiment

The device of accompanying drawing will become the main device that novel Raman spectrum detects, and be used for the Raman spectrum of testee is detected.Light when excitation source 1 sends when exciting composite set 2 by polarization, can produce the exciting light of different polarization state, can be circularly polarized light, linearly polarized light or nonpolarized light.When this exciting light arrives testee 3 on objective table 4, testee 3 sends corresponding raman spectral signal and receives composite set 5 by polarization again, this installs the raman spectral signal of separable acquisition different polarization state, this signal is received by Raman detection system 6, handle and display system 7 by raman spectral signal again, can obtain the different raman spectral signal of sample under different polarization excites, thus can be from this signal, the structure or the composition of further object analysis.

Claims

1. a novel Raman spectrum pick-up unit is characterized in that pick-up unit excites composite set, testee, polarization to receive composite set, Raman detection system and raman spectral signal processing by Raman spectrum excitation source, polarization and constitutes with display system; The Raman spectrum excitation source arrives before the testee, earlier excite composite set by a polarization, with testee on the polarized excitation light irradiation objective table that produces different conditions, exciting composite set rear polarizer exciting light by polarization can be circularly polarized light, linearly polarized light or nonpolarized light; Testee produces raman spectral signal under the exciting of different conditions polarized excitation light, this spectral signal scattering enters polarization and receives composite set, this installs the raman spectral signal of separable acquisition different conditions polarized light, this signal arrives the Raman detection system, arriving raman spectral signal at last handles and display system, thereby can obtain by the different polarization optical excitation, the Raman signal of the testee that separates by different polarization again is with the Accurate Analysis that realizes the testee material is constituted.

2. a kind of novel Raman spectrum pick-up unit according to claim 1, it is characterized in that described polarization excites composite set to be made up of the some optical polarizers that can produce the different polarization state light, but these polaroid monolithics or multi-disc enter light path, thereby produce the different polarization state light, comprise circularly polarized light, linearly polarized light, nonpolarized light.

3. a kind of novel Raman spectrum pick-up unit according to claim 1, it is characterized in that described polarization receives composite set and is made up of the some optical polarizers that can obtain the different polarization state light, but these polaroid monolithics or multi-disc enter light path, thereby obtain the different polarization state light, comprise circularly polarized light, linearly polarized light, nonpolarized light.

4. a kind of novel Raman spectrum pick-up unit according to claim 1 is characterized in that in the described Raman spectrum pick-up unit, and polarization excites composite set, polarization to receive composite set and can be used in combination, and also can use separately.