CN209690155U - A kind of CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating - Google Patents
A kind of CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating Download PDFInfo
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- CN209690155U CN209690155U CN201920164191.3U CN201920164191U CN209690155U CN 209690155 U CN209690155 U CN 209690155U CN 201920164191 U CN201920164191 U CN 201920164191U CN 209690155 U CN209690155 U CN 209690155U
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Abstract
The utility model relates to the CCD spectroanalysis instruments of a kind of automatic zero adjustment and temperature-compensating, the spectroanalysis instrument includes shell, cosine corrector, slit, collimating mirror, dispersion element plane grating, imaging mirror and ccd sensor, and the beginning part of the ccd sensor is equipped with light shield layer.The utility model covers in ccd sensor the beginning part light-induced charge unit, does not allow its photosensitive；In entire measurement process, the voltage of subsequent photosensitive part electric charge element output is subtracted to the voltage of the not photosensitive part electric charge element output of beginning, that is, realizes that automatic zero-bit deducts；The zero-bit dark voltage signal arrived according to automatic measurement, adjust automatically DAC export offset voltage, subtract zero-bit dark voltage should ring to output signal；It thereby realizes and deducts dark signal in real time, realize automatic zero-bit and be calibrated and compensated.
Description
Technical field
The utility model relates to a kind of spectroradiometric measurement and spectral analysis devices, and in particular to a kind of automatic zero adjustment
With the CCD spectroanalysis instrument of temperature-compensating.
Background technique
The spectroanalysis instrument being widely used at present, photoelectricity, which turns device, photo-multiplier tube type, linear CCD sensor and linear array
COMS sensor, to obtain accurate measurement result, requires to carry out zero adjustment before measuring regardless of which kind of sensor；
When temperature changes, zero-bit can also change, and need to recalibrate.Zero-bit causes to close weight in entire measurement process
It wants.
There are mainly two types of for the zero adjustment method being widely used at present: one is manually method is used, in spectrum
Instrument external lid lives light inlet and carries out zero adjustment, and this method is inconvenient to use, and needs again when temperature changes
It is calibrated；Another kind is to cover zero adjustment, this method structure ratio for light inlet inside machine using mechanical shutter
It is larger, it is only suitable for large-scale desktop machine.
The zero-bit of another ccd sensor can should be rung with temperature and the time of integration, and every 5 degree of the variation of temperature, total null voltage can be double
Increase big；Zero-bit increases with time of integration property line；So when the time of integration becomes larger, zero-bit even can reach dynamic when temperature increases
The half of state range can thus be such that the dynamic range of measurement reduces.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of automatic zero adjustment and temperature is mended
The CCD spectroanalysis instrument repaid.
In order to achieve the above object, the technical solution adopted in the utility model are as follows:
A kind of CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating, the spectroanalysis instrument includes shell, cosine
Corrector, slit, collimating mirror, dispersion element plane grating, imaging mirror and ccd sensor, the ccd sensor
The beginning part is equipped with light shield layer.
Preferably, the outside portion of shell is arranged in the cosine corrector.
Preferably, the slit, collimating mirror, dispersion element plane grating, imaging mirror and ccd sensor are set
It sets in shell.
Preferably, the ccd sensor is connected with mainboard.Mainboard controls ccd sensor and exports electric signal, acquires and divides
Analyse spectroscopic data output display.
Preferably, the length of the light shield layer includes 10~500 pixels.Ccd sensor start tens to several
Hundred pixels are covered by light shield layer, not light sensing, only adapt to the time of integration of CCD and the variation of temperature, equivalent output
The zero signal of subsequent each CCD pixel point.
The utility model covers in ccd sensor the beginning part light-induced charge unit, does not allow its photosensitive；Entirely measured
The voltage of subsequent photosensitive part electric charge element output is subtracted the voltage of the not photosensitive part electric charge element output of beginning, i.e., by Cheng Zhong
Realize that automatic zero-bit deducts；The zero-bit dark voltage signal arrived according to automatic measurement, adjust automatically DAC export offset voltage, subtract
Zero-bit dark voltage should be rung to output signal；It thereby realizes and deducts dark signal in real time, realize automatic zero adjustment and benefit
It repays.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but claimed by the utility model
Range be not limited to this.
Referring to Fig.1, the CCD spectroanalysis instrument of a kind of automatic zero adjustment and temperature-compensating, the spectroanalysis instrument include
Shell 9, cosine corrector 1, slit 2,3 mirror of collimated reflected, dispersion element plane grating 4, imaging mirror 5 and ccd sensor
6, the beginning part of the ccd sensor 6 is equipped with light shield layer 7；The outside portion of shell 9 is arranged in the cosine corrector 1, described
Slit 2,3 mirror of collimated reflected, dispersion element plane grating 4, imaging mirror 5 and ccd sensor 6 are arranged in shell 9.It will
Ccd sensor the beginning part light-induced charge unit covers in, and does not allow its photosensitive；In entire measurement process, by subsequent photosensitive part
The voltage of electric charge element output subtracts the voltage of the not photosensitive part electric charge element output of beginning, that is, realizes that automatic zero-bit deducts；Root
The zero-bit dark voltage signal arrived according to automatic measurement, adjust automatically DAC export offset voltage, subtract zero-bit dark voltage to output signal
Should ring；It thereby realizes and deducts dark signal in real time, realize automatic zero-bit and be calibrated and compensated.
The ccd sensor 6 is connected with mainboard 8.Mainboard controls ccd sensor and exports electric signal, acquires and analyzes spectrum
Data output display.
The length of the light shield layer 7 includes 10~500 pixels.Ccd sensor start tens to several hundred a pixels
Point is covered by light shield layer, not light sensing, only adapts to the time of integration of CCD and the variation of temperature, and equivalent output is subsequent each
The zero signal of CCD pixel point.
The working principle of the utility model are as follows:
It after being irradiated to cosine corrector 1 by light signal, is entered in spectrometer shell 9 by slit 2, collimated reflection
Mirror 3 reflects to form directional light, is incident on dispersion element plane grating 4, and dispersion element 4 is divided incident light, after light splitting
Monochromatic light project focal imaging reflecting mirror 5 and converge on ccd sensor 6,6 the beginning part of ccd sensor has the use of light shield layer 7
It is photosensitive in shielded segment CCD.Mainboard 8 controls ccd sensor and exports electric signal, acquires and analyzes spectroscopic data output display.
What ccd sensor started tens is covered to several hundred a pixels by light shield layer 7, not light sensing, only adapts to CCD
The time of integration and temperature variation, the zero signal of the subsequent each CCD pixel point of equivalent output.Mainboard MCU collects front
Pixel number voltage value is set, the zero signal as CCD is averaged, MCU changes D/A output voltage according to the zero signal
To signal condition difference channel, reduce the total null voltage of CCD output.By the AD value of each pixel when spectroscopic data calculation processing
Zero signal AD value is subtracted, thereby realizes and deducts dark signal in real time, realize automatic zero-bit and be calibrated and compensated.
Claims (2)
1. the CCD spectroanalysis instrument of a kind of automatic zero adjustment and temperature-compensating, it is characterised in that: the spectroanalysis instrument includes
Shell, cosine corrector, slit, collimating mirror, dispersion element plane grating, imaging mirror and ccd sensor, it is described
The beginning part of ccd sensor is equipped with light shield layer；The outside portion of shell is arranged in the cosine corrector；The slit, collimation
Reflecting mirror, dispersion element plane grating, imaging mirror and ccd sensor are arranged in shell；The ccd sensor and mainboard
It is connected.
2. the CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating according to claim 1, it is characterised in that: described
The length of light shield layer includes 10~500 pixels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920164191.3U CN209690155U (en) | 2019-01-30 | 2019-01-30 | A kind of CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920164191.3U CN209690155U (en) | 2019-01-30 | 2019-01-30 | A kind of CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209690155U true CN209690155U (en) | 2019-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920164191.3U Active CN209690155U (en) | 2019-01-30 | 2019-01-30 | A kind of CCD spectroanalysis instrument of automatic zero adjustment and temperature-compensating |
Country Status (1)
| Country | Link |
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| CN (1) | CN209690155U (en) |
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2019
- 2019-01-30 CN CN201920164191.3U patent/CN209690155U/en active Active
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