CN2075339U - New structure for lastr radiation detector - Google Patents
New structure for lastr radiation detector Download PDFInfo
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- CN2075339U CN2075339U CN 90202337 CN90202337U CN2075339U CN 2075339 U CN2075339 U CN 2075339U CN 90202337 CN90202337 CN 90202337 CN 90202337 U CN90202337 U CN 90202337U CN 2075339 U CN2075339 U CN 2075339U
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- sensor element
- radiation detector
- thermal sensor
- laser radiation
- cavity
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Abstract
The utility model relates to a new structure for laser radiation detector, which belongs to the field of measuring instrument of laser parameter. The detected light can be absorbed directly by the pyroelectric material of the thermistor sensor component which is adopted by the structure of the utility model, and the absorber portion of the usual detector is removed. The utility model not only enhance the sensitivity and the response time of the instrumentation, enlarge the measuring range, but also make the structure of the instrumentation is more simple and the manufacture is convenient.
Description
The utility model belongs to the laser parameter measurement instrument field.
At present the laser radiation detector that uses of people is thermistor detector mostly, mainly contains calorimetric thermocouple type detector and thermoelectric type detector, as No. 89220541.5, No. 85100696, Chinese patent application and Chinese patent application.Structurally their core all is made up of thermal sensor element and absorber two parts, and is indispensable.Use pyroelectricity material as No. 89220541.5, the Chinese patent application of thermal sensor element, owing to structurally adopt detected light from the direction incident parallel with the pyroelectricity material polarised direction, the energy of detected light must could conduct by absorber and electrode gives thermal sensor element, thermal sensor element can not directly absorb detected light, its sensitivity and response time are restricted, and because the characteristic of absorber makes its measurement range big inadequately.
The purpose of this utility model is: overcome above-mentioned shortcoming and defect, a kind of high sensitivity, fast-response of seriation of new construction, the new pattern laser radiation detector of wide-range are provided.
The new structure laser radiation detector that the utility model provides has structurally removed the absorber part in the common detector, and its core only is made up of thermal sensor element, and just thermal sensor element itself also is an absorber.Thermal sensor element use lithium niobate, lithium tantalate, lead titanates,
List of references: 1. No. 89220541.5, Chinese patent application.
2. U.S. Laser Precision Corporation product description.Barium titanate, lead zirconate titanate series etc. have ferroelectric, the piezoelectric of pyroelectricity characteristic, adopt detected light from the vertical direction incident of pyroelectricity material polarised direction quadrature, make pyroelectricity material directly absorb detected light, so just can obtain the maximum sensitivity and the fastest response time of the pyroelectricity material that uses as thermal sensor element.In addition, above-mentioned various pyroelectricity material quality are hard, and capability of resistance to radiation is strong, can bear big laser power density, thereby can obtain the wide-range of laser energy on a large scale of the unapproachable detection of all detectors at present.
Describe series structure of the present utility model in detail below in conjunction with accompanying drawing.The utility model structurally comprises and uses the pyroelectricity material of monolithic (piece) or lamination to do thermal sensor element, makes plane, conical cavity type, serrate, splits the type detector.
Figure 1 shows that monolithic planarized structure laser radiation detector figure, it is by protecgulum (1), screw pressure ring (2), packing ring (3), the thermal sensor element of a slice or lamination (4) (Figure 2 shows that two or multi-disc pyroelectricity material by the utmost point to carrying out the serial or parallel connection constitutional diagram), metallic cavity (5) five parts are formed.Wherein the thickness of thermal sensor element can be from 0.01mm-10mm, and area can be from 0.5mm
2-10000mm
2, electrode is made in respectively on its plane of polarization.Adopt multi-disc laminated type planar structure, can not only make bigbore laser detector, and because the tandem compound of each sheet pyroelectricity material makes the pyroelectricity signal superpose, and sensitivity is higher, total electric capacity reduces, and makes response faster.
Figure 3 shows that the laser radiation detector figure of conical cavity type structure, it mainly is made up of protecgulum (6), screw pressure ring (7), packing ring (8), thermal sensor element (9), cavity (10) five parts.Wherein thermal sensor element (9) can be square or circular piece, also can be the lamination (as shown in Figure 4 two or polylith pyroelectricity material by the utmost point to carrying out the overlapped in series constitutional diagram) of polylith.The accent in awl chamber can be from φ 1mm-φ 100mm, and drift angle can be from 5 °-180 °, and electrode is attached to respectively up and down on two table tops, as also can be in the side with square pyroelectricity material electrode.
Figure 5 shows that the laser radiation detector of splitting the shape structure, it mainly by protecgulum (11), screw pressure ring (12), packing ring (13), split shape thermal sensor element (14), cavity (15) five parts are formed.Wherein splitting shape thermal sensor element (14) can be made up of one or two pyroelectricity materials.Splitting the shape accent can be from 0.5mm
2-10000mm
2, drift angle is from 5 °-180 °.
Figure 6 shows that the laser radiation detector of zigzag structure, it mainly is made up of protecgulum (16), screw pressure ring (17), packing ring (18), serrate thermal sensor element (19), cavity (20) five parts.Wherein serrate thermal sensor element (19) can be made up of monolithic or the trapezoidal pyroelectricity material of polylith.The serrate accent can be from 0.5mm
2-10000mm
2, each serrate drift angle can be from 1 °-180 °.
According to power W=ENERGY E/time T, utilize the structure of above-mentioned range detector, can be made into the power meter of chopped mode described in No. 89220541.5, the Chinese patent application or sampling chopped mode structure.
In the employed several pyroelectricity materials of the utility model,, also can adhere to the last layer absorber, increase its spectral absorption scope to reach at its surface (light entrance face) if wherein certain material spectrum absorption region is narrow.
In order to measure the laser pulse of high repetition frequency, can realize at the electrode of thermal sensing element or the two ends parallel resistance of signal lead on demand.If the average power of repetitive frequency pulsed laser is bigger, just on as heat sink cavity, add water-cooled.
Embodiment 1:
Manufacture monolithic plane laser radiation detector shown in Figure 1, making external diameter with alloy aluminum and do the protecgulum (1) of packing ring (3), alloy aluminum screw pressure ring (2) and external diameter φ 65mm for the organic glass of the cavity (5) of the long 40mm of φ 60mm, external diameter φ 50mm and boil blackly, is 30 * 30mm with area
2The barium titanate of thick 2mm is done thermal sensor element (4), with thermal conductive insulation glue thermal sensor element (4) is bonded in the cavity (5), draws signal with coaxial wire.
Embodiment 2:
Manufacturing by embodiment 1, is thermal sensor element (4) difference, and thermal sensor element adopts 3 thick 2mm area 10 * 30mm
2Strontium barium niobate press Fig. 2 conducting resinl tandem compound, make laminated type plane laser radiation detector.
Embodiment 3:
By the monolithic conical cavity type laser detector of doing shown in Figure 3, make the cavity (10) of external diameter φ 50 * long 60mm with steel, nylon is done the packing ring (8) of φ 40mm, and the protecgulum (6) of iron screw pressure ring (7) and external diameter φ 55 also boils black.On the cylindrical PLZT-5 material of φ 30 * long 40mm, be a bore φ 20mm, drift angle is that conical cavity type thermal sensor element (9) is done in the empty awl of 35 ° one chamber, with thermal conductive insulation glue awl chamber (9) is fixed in the cavity (10), and draw signal with coaxial wire, coaxial wire crust ground connection in the silver electrode of thermal sensor element (9).
Embodiment 4:
Manufacture by embodiment 3, thick be that 8 lithium niobates of 5mm * φ 30 are pressed Fig. 4 conducting resinl tandem compound, do a bore φ 20mm * drift angle then thereon and be 40 ° sky awl chamber and do thermal sensor element (9).
Embodiment 5:
Manufacture by Fig. 5 and to split the shape laser radiation detector.Make the cavity (15) of external diameter φ 60mm * long 60mm with alloy aluminum, the plastic washer of φ 50mm (13), iron screw pressure ring (12) and external diameter are the protecgulum (11) of 65mm and boil black.With the lead titanates of 2 wide 25mm * long 40mm * thick 1.5mm make drift angle be 30 ° split shape thermal sensor element (14), be fixed in the cavity (15) with epoxy resin, the electrode parallel connection of two lead titanates, two end electrodes is drawn signal with coaxial wire, cable crust ground connection.
Embodiment 6:
Manufacture serrate laser radiation detector shown in Figure 6.Make the cavity (20) of external diameter φ 40mm * long 30mm with the alloy aluminum material, the iron washer of φ 30mm (18) and screw pressure ring (17), external diameter are the protecgulum (16) of 45mm and boil black.On the square lead zirconat-titanato material of a 25mm, be tooth mouth 2mm, drift angle and be 10 zigzag thermal sensor elements (19) of 8 °, be fixed on the cavity (20) with insulating heat-conductive glue, and assurance incident direction of light is perpendicular to the polarised direction of pyroelectricity material, from its electrode, draw signal, coaxial wire crust ground connection with coaxial wire.
Embodiment 7:
Manufacture by embodiment 6, thermal sensor element (19) difference, the thick lead lanthanum zirconate titanate of 2mm make upper base 2mm, the right-angled trapezium of the 10mm that goes to the bottom, trapezoidally build up serrate shown in Figure 6 to 13 then as thermal sensor element (19).
Embodiment 8:
Manufacture by embodiment 6, the resistance of a 1/4WIK Ω in parallel between two electrodes of thermal sensor element is made the laser radiation detector that responds fast pulse.
Embodiment 9:
Manufacture by embodiment 1, cavity (15) difference adds the water collar of copper on as heat sink cavity (5), makes the laser radiation detector of measuring Average Power Pulse laser.
The typical index that laser radiation detector of the present utility model reaches is as follows:
Spectral response range: 0.25-25 μ m
Sensitivity: 300mV/mj
Response time:＜100ns
Bear power density:＞300MW/cm
2
Resolution: 10
-10J.
The new pattern laser radiation detector that the utility model provides, since adopt detected light from the vertical direction incident of pyroelectricity material polarised direction quadrature, pyroelectricity material as thermal sensor element directly absorbs detected light, thereby obtaining the maximum sensitivity and the response time of this material, the detector of making has the characteristics of high sensitivity, fast-response and wide-range.Simultaneously owing to saved absorber part in the common detector, make simple in structurely, simplified manufacturing process is easy to promote, and has practical value.
Claims (5)
1, a kind of by thermal sensing element, the new structure laser radiation detector that cavity is formed, it is characterized in that: with having the ferroelectric of pyroelectricity characteristic, piezoelectric is done thermal sensor element (4), thermal sensor element (4) is with monolithic or monolithic or lamination is in parallel or planar shaped is made in series connection, conical cavity type, serrate, split shape, it is fixed in the cavity (5) with adhesive glue or mechanical system, fixedly the position of thermal sensor element (4) will guarantee the polarised direction of incident direction of light perpendicular to pyroelectricity material, from its electrode, draw signal, coaxial wire crust ground connection with coaxial wire.
2, by the described laser radiation detector of claim 1, it is characterized in that: thermal sensor element is lithium niobate, lithium tantalate, barium titanate, lead titanates, lead zirconate titanate pyroelectricity material, used its material thickness, and from 0.01mm-1000mm, area is from 0.5mm
2-10000mm
2
3, by the described laser radiation detector of claim 1, it is characterized in that: on the detection light receiving surface of thermal sensor element (4), adopt to be coated with, to glue, to plate, to deposit various absorbers and make.
4, by the described laser radiation detector of claim 1, it is characterized in that:, further improve the response time and press the half width of narrow signal pulse in the two ends parallel resistance of two electrodes or the signal extension line of thermal sensor element (4).
5, by the described laser radiation detector of claim 1, it is characterized in that: on as heat sink cavity (5), add water-cooled, make the laser radiation detector of measuring high-repeat frequency rate high-average power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90202337 CN2075339U (en) | 1990-03-07 | 1990-03-07 | New structure for lastr radiation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90202337 CN2075339U (en) | 1990-03-07 | 1990-03-07 | New structure for lastr radiation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2075339U true CN2075339U (en) | 1991-04-17 |
Family
ID=4883764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90202337 Withdrawn CN2075339U (en) | 1990-03-07 | 1990-03-07 | New structure for lastr radiation detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2075339U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116117B (en) * | 2005-02-07 | 2011-12-21 | 报知机股份有限公司 | Thermal sensor |
| TWI385365B (en) * | 2005-02-07 | 2013-02-11 | Hochiki Co | Thermal detector |
| CN103344328A (en) * | 2013-07-15 | 2013-10-09 | 河北大学 | Horizontal thermoelectric optical detector of multilayer structure |
-
1990
- 1990-03-07 CN CN 90202337 patent/CN2075339U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116117B (en) * | 2005-02-07 | 2011-12-21 | 报知机股份有限公司 | Thermal sensor |
| TWI385365B (en) * | 2005-02-07 | 2013-02-11 | Hochiki Co | Thermal detector |
| CN103344328A (en) * | 2013-07-15 | 2013-10-09 | 河北大学 | Horizontal thermoelectric optical detector of multilayer structure |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |