CN2620258Y - Spectrum polarized radiation meter - Google Patents
Spectrum polarized radiation meter Download PDFInfo
- Publication number
- CN2620258Y CN2620258Y CN 03221605 CN03221605U CN2620258Y CN 2620258 Y CN2620258 Y CN 2620258Y CN 03221605 CN03221605 CN 03221605 CN 03221605 U CN03221605 U CN 03221605U CN 2620258 Y CN2620258 Y CN 2620258Y
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- polarizing
- seam
- object lens
- spherical reflector
- depolarizer
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Abstract
The utility model relates to a fine spectra polarized radiometer including a spectra polarized measuring head, a location laser, a singlechip control system and a computer, which is characterized in that the spectra polarized measuring head is composed of a polarimeter, a depolarizer, an object lens, a field lens, a seam for entering, a spherical reflector and a plane reflex grating, the field lens is equipped on the focal plane of the object lens, the object lens has the same yoke with the seam, the photosensitive areas of the seam and a detector are positioned on the focal plane of the spherical reflector. The apparatus solves the problems that the traditional photometry measurement can not handle, and can also provide the measured data of the radiation quantity together with acquiring the polarization measuring result. The utility model has good efficacy, a small size and a light weight, and is portable.
Description
Technical field
The utility model relates to a kind of optical electron meter, exactly is a kind of subdivided spectral polarizing radiometer.
Background technology
Up to the present, spectral radiometer or spectrometer all adopt traditional light intensity detection method, all are surface state, temperature, composition and other physicochemical characteristicss of inquiring into target with the radiation intensity that target is obtained in different spectrum segments.These instruments have just utilized electromagnetic strength characteristics and geometric properties, do not utilize polarisation of light to come target detection.
Common actinometry all is not to be with polarimetry, metering system is broadly divided into length scanning and full spectrum is surveyed two kinds simultaneously, length scanning once can only be measured the spectral power of a wave band, even only measure visible light wave range, needs several minutes time at least.It is that all monochromatic flat radiation is incided on the multichannel light electric explorer simultaneously that full spectrum is surveyed simultaneously.Detector obtains overall optical spectral power distribution information simultaneously, and changes out the multichannel parallel electrical signal, and under the control of clock pulse signal, timesharing serial output electric signal is realized the quick measurement to target.
The also information of certain wave band just that some spectrum polarizing Image-forming instruments obtain can not be finished the measurement of continuous spectrum, and spectrally resolved rate variance can not reach the purpose of subdivided spectral, can not satisfy the polarimetry to the full spectrum of target.
Summary of the invention
The purpose of this utility model is to provide a kind of spectrum polarizing radiometer that can solve the more insurmountable problems of traditional photometry actinometry to people.It can also provide the measurement data of radiant quantity when obtaining the polarimetry result.That is to say that polarimetry has comprised actinometry.Because the degree of polarization of some target emissions and reflection is relevant with the direction of its surface normal with direction with the degree of polarization of reflection amplitudes, therefore utilize this characteristic can improve effectively to the identification of targets degree, and can realize the Three-dimension Target detection, obtain the spectrum polarizing data of terrain object, set up basic spectrum polarization data storehouse, support the research work of remote sensing image processing and target optical spectrum polarization characteristic.
The utility model comprises spectrum polarizing measuring head, locating laser device, single-chip computer control system and computing machine, it is characterized in that the spectrum polarizing measuring head by polarizer, object lens, field lens, go into seam, spherical reflector and plane reflection grating and form, field lens is positioned on the focal plane of object lens, object lens with go into to stitch conjugation, the photosurface of going into seam and detector is positioned on the focal plane of spherical reflector.
In addition, polarizer is driven by the transmission of stepper motor by synchronous band, and its transmission ratios is 1: 1.The plane reflection grating is 0.85 times of spherical reflector focal length to the distance on catoptron summit.The width of going into seam is identical with the single pixel size of detector, spherical reflector and optical grating constitution polychromator.Described single-chip computer control system comprises single-chip microcomputer, sequential circuit, programmable amplifying circuit, A/D module converts, display screen and storer.
Place the preceding depolarizer of object lens to select quartzy wedge shape depolarizer for use, the two sides is the light face.
During use, whether power-on is at first opened the locating laser device and is used for monitoring in real time and measures head and aim at the mark.Carry out the measurement of 0 degree then earlier, obtain the spectral reflectance of this polarization direction, send instruction by control system to motor again and drive polarizer, successively 60 degree, two polarization directions of 120 degree are measured, by computing machine the spectral reflectance of three polarization directions is carried out the calculating of target degree of polarization again, provide the degree of polarization curve of target at last.Measure particularly is the optical system chromatic dispersion beam split of adopting the plane reflection optical grating constitution, the atural object radiation through polarizer again via grating beam splitting, be dispersed on each unit of 256 yuan of silicon photoelectric diode linear array detectors, each single-element detector is converted to charge signal with the branch coloured light of the fixed wave length component that receives, read by sequential circuit control linear array scanning and signal, the integral charge of each unit's response of series read-out detector, after amplifying, programme control circut carries out 12bit accuracy A/D analog to digital conversion, obtain the curve data of the target emanation spectral characteristic of 256 spectral wavelength points compositions, for improving the signal to noise ratio (S/N ratio) of apparatus measures, with curve of spectrum of 16 the superimposed formation of sampling curve, be stored in the storer.
Effect of the present utility model:
This instrument can be that 0 degree, 60 degree, 120 are spent the polarized radiation measurement to target from three angles, and can provide the spectral reflectivity of target, has solved the more insurmountable problems of traditional photometry measurement.When obtaining the polarimetry result, the measurement data of radiant quantity can also be provided, be a kind of portable instrument of the visible and near-infrared band reflection of polarization spectrum under the natural conditions in the open air of thing variously of measuring.This instrument has moderate spectral resolution and Measuring Time, and higher signal to noise ratio (S/N ratio).Volume is little, and is in light weight, and the structure of two unit being made up of optical head and electronics cabinet is fit to open-air people and operates.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the synoptic diagram of spectrum polarizing detecting head.
The spectrum polarizing curve map of Fig. 3 for using this apparatus measures to get.
Embodiment
Embodiment 1:
Referring to Fig. 1,2, the utility model comprises spectrum polarizing measuring head 1, locating laser device 2, single-chip computer control system 3 and computing machine 4, the spectrum polarizing measuring head by polarizer 5, depolarizer 19, object lens 6, field lens 7, go into seam 8, spherical reflector 9 and plane reflection grating 10 and form.Polarizer 5 by being with synchronously with transmission driving in 1: 1, is that 0 degree, 60 degree, 120 spend polarized radiation measurement to target from three angles by stepper motor 11.Field lens 7 is positioned on the focal plane of object lens 6, and object lens 6 are imaged onto on the seam 8, and its effect is to make object lens 6 and go into seam 8 conjugation, makes the visual field become circle by rectangle.The width of going into seam 8 is big or small identical with 256 yuan of silicon photo diode linear array detector 12 single pixels; Spherical reflector 9 and plane reflection grating 10 constitute polychromator, and the photosurface of going into seam 8 and silicon photo diode linear array detector 12 is positioned on the focal plane of spherical reflector 99 collimations of spherical reflector and imaging double action.Because the optimized spectrum face of polychromator is the face of cylinder,, make plane reflection grating 10 surperficial 0.85 times of equaling the spherical reflector focal length to the distance on spherical reflector summit for obtaining straight spectrum face.Single-chip computer control system comprises single-chip microcomputer 18, sequential circuit 13, programmable amplifying circuit 14, A/D module converts 15, display screen 16 and storer 17.Whether locating laser device 2 is to be used for monitoring in real time measuring head target is being measured.Computing machine 4 is to finish DATA REASONING, processing and data management for the user.Depolarizer 19 mainly is to solve grating pair polarization direction sensitive question, that is to say, when light incides the grating knurled surfaces, the linearly polarized light that the polarization direction is different for intensity is identical, the grating efficiency difference, the branch spectral power distribution of grating can change to some extent with respect to natural light, thereby influences measuring accuracy.Depolarizer is selected quartzy wedge shape depolarizer for use, and the two sides all is the light face, and its main effect is the birefringent characteristic that utilizes quartz crystal, promptly o light is produced different refractive indexes with e light, thereby reaches the purpose of depolarization.Because the angle that wedge shape is warded off is very little, light does not have energy loss basically by very little skew only takes place after it again.Referring to Fig. 3, this figure is the spectrum polarizing degree that adopts this instrument the vertical observation station in a certain meadow to be recorded in the open air, and relative error is 0.2% (degree of polarization is 10%).
Claims (6)
1, a kind of subdivided spectral polarizing radiometer, comprise spectrum polarizing measuring head, locating laser device, single-chip computer control system and computing machine, it is characterized in that the spectrum polarizing measuring head by polarizer, depolarizer, object lens, field lens, go into seam, spherical reflector and plane reflection grating and form, field lens is positioned on the focal plane of object lens, object lens with go into to stitch conjugation, the photosurface of going into seam and detector is positioned on the focal plane of spherical reflector.
2, subdivided spectral polarizing radiometer according to claim 1 is characterized in that polarizer is driven by the transmission of stepper motor by synchronous band, and its transmission ratios is 1: 1.
3, subdivided spectral polarizing radiometer according to claim 1 is characterized in that the plane reflection grating is 0.85 times of spherical reflector focal length to the distance on catoptron summit.
4, subdivided spectral polarizing radiometer according to claim 1, it is characterized in that into the width of seam identical with the single pixel size of detector, spherical reflector and optical grating constitution polychromator.
5, subdivided spectral polarizing radiometer according to claim 1 is characterized in that described single-chip computer control system, comprises single-chip microcomputer, sequential circuit, programmable amplifying circuit, A/D module converts, display screen and storer.
6, subdivided spectral polarizing radiometer according to claim 1 is characterized in that describedly placing the depolarizer before the object lens to select quartzy wedge shape depolarizer for use, and the two sides is the light face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221605 CN2620258Y (en) | 2003-04-30 | 2003-04-30 | Spectrum polarized radiation meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221605 CN2620258Y (en) | 2003-04-30 | 2003-04-30 | Spectrum polarized radiation meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2620258Y true CN2620258Y (en) | 2004-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03221605 Expired - Fee Related CN2620258Y (en) | 2003-04-30 | 2003-04-30 | Spectrum polarized radiation meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN2620258Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793556A (en) * | 2010-04-08 | 2010-08-04 | 北京理工大学 | Device and method for measuring polarization state by utilizing multiple-slit diffraction method |
| CN101009519B (en) * | 2007-01-25 | 2010-09-01 | 中国科学院上海微系统与信息技术研究所 | A monitoring instrument for diffraction grating light signal with dual channel structure |
-
2003
- 2003-04-30 CN CN 03221605 patent/CN2620258Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009519B (en) * | 2007-01-25 | 2010-09-01 | 中国科学院上海微系统与信息技术研究所 | A monitoring instrument for diffraction grating light signal with dual channel structure |
| CN101793556A (en) * | 2010-04-08 | 2010-08-04 | 北京理工大学 | Device and method for measuring polarization state by utilizing multiple-slit diffraction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |