CN1320339C - Luminous power meter based on semiconductor refrigerator - Google Patents
Luminous power meter based on semiconductor refrigerator Download PDFInfo
- Publication number
- CN1320339C CN1320339C CNB031324363A CN03132436A CN1320339C CN 1320339 C CN1320339 C CN 1320339C CN B031324363 A CNB031324363 A CN B031324363A CN 03132436 A CN03132436 A CN 03132436A CN 1320339 C CN1320339 C CN 1320339C
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- China
- Prior art keywords
- refrigerator
- amplification circuit
- thermistor
- power
- differential operational
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Abstract
The present invention discloses a luminous power meter based on a semiconductor refrigerator, which belongs to an instrument for measuring the output power of laser sources. The instrument is composed of a black body for absorbing laser energy, a thermistor, a refrigerator and radiating fins are arranged in the black body, a thermistor, a resistor (R1), a resistor (R2), a differential operational amplification circuit and a power amplification circuit are arranged on the radiating fins, the instrument also comprises a display circuit, wherein an absorber of the refrigerator and a surface of the black body are tightly contacted, output ends of the differential operational amplification circuit and the power amplification circuit are connected with an input end of the display circuit and an input end of the refrigerator, and an output end of the refrigerator is connected with the ground. When temperature is changed a little, the differential operational amplification circuit and the power amplification circuit start to work, so the instrument has good response to input luminous power. The semiconductor refrigerator has the advantages of simple structure, reliable work and low price and is used on the present invention, so the manufacturing cost of the present invention is greatly reduced, and the present invention has the advantages of light weight, small volume and low manufacturing cost.
Description
Technical field: the instrument that the present invention relates to a kind of laser light source output power.
Background technology: at present laser technology has been applied to a lot of fields, all will select only laser instrument as required at different applied environments, and Output optical power is one of performance parameter main when selecting.The luminous power of measuring light power is in respect of two types at present: a kind of is the thermal cross over type, and a kind of is the opto-electronic conversion type.Opto-electronic conversion type light power meter exists power measurement narrow range, applicable wavelengths narrow range and selected materials environment to be had the defective of pollution, thermal cross over type light power meter utilizes black matrix to absorb the size that the rising of temperature comes measuring light power behind the luminous energy, its advantage is no wavelength selectivity, spectral response curve is smooth and accuracy is high, and its shortcoming is a long and manufacturing cost height of response time.
Summary of the invention: for the thermal cross over type light power meter response time that overcomes prior art long, the defective that manufacturing cost is high, provide a kind of response quick, the light power meter of low cost, the present invention is achieved by following scheme: a kind of light power meter of based semiconductor refrigerator, it is by the black matrix 1 that absorbs laser energy, be arranged on first thermistor 2 in the black matrix 1, refrigerator 3, heat radiator 7, be arranged on second thermistor 4 on the heat radiator 7, first resistance R 1, second resistance R 2, differential operational amplifies and power amplification circuit 5 and display circuit 6 compositions, the chain of command 3-1 of refrigerator 3 closely contacts with the surface of black matrix 1, the radiating surface 3-2 of refrigerator 3 closely contacts with the surface of heat radiator 7, one end of first resistance R 1 is connected with power supply+Ec, one end of the other end of first resistance R 1 and first thermistor 2 amplifies with differential operational and is connected with an input end of power amplification circuit 5, the other end ground connection of first thermistor 2, one end of second resistance R 2 is connected with power supply+Ec, one end of the other end of second resistance R 2 and second thermistor 4 amplifies with differential operational and is connected with another input end of power amplification circuit 5, the other end ground connection of second thermistor 4, the input end of the output termination display circuit 6 of differential operational amplification and power amplification circuit 5 and the input end of refrigerator 3, the output head grounding of refrigerator 3.The present invention is work like this: black matrix 1 receives incident laser energy and is converted into heat, black matrix 1 temperature raises, temperature raises and causes that the resistance of first thermistor 2 changes, change differential operational amplification and electric current of power amplification circuit 5 outputs under the control at this, the chain of command 3-1 temperature of refrigerator 3 descended when this electric current flow through refrigerator 3, thereby make black matrix 1 recover original temperature, because differential operational amplifies and the electric current of power amplification circuit 5 outputs is directly proportional with the power of laser incident, so measure the incident power that this electric current promptly can be measured laser, this power demonstrates from display circuit 6.Because laser inputs to the heat of black matrix 1 and is offset by refrigerator refrigeration work, black matrix 1 of the present invention always works in the dynamic balance state of temperature, the temperature of black matrix 1 fluctuates in very little scope, temperature changes slightly, differential operational amplifies and power amplification circuit 5 promptly can be started working, therefore input optical power is had good response, the present invention simultaneously can also bear high-intensity laser input, can realize the measurement of more high-power scope.Semiconductor cooler is simple in structure, reliable operation, cheap, and semiconductor cooler is used in the present invention, and manufacturing cost of the present invention is reduced greatly, and that the present invention has is in light weight, volume is little and advantage of low manufacturing cost.
Description of drawings: Fig. 1 is the syndeton synoptic diagram of black matrix 1 of the present invention, first thermistor 2, refrigerator 3, heat radiator 7 and second thermistor 4, and Fig. 2 is a circuit connection structure synoptic diagram of the present invention.
Embodiment: specify present embodiment below in conjunction with Fig. 1 and Fig. 2.It is by the black matrix 1 that absorbs laser energy, be arranged on first thermistor 2 in the black matrix 1, refrigerator 3, heat radiator 7, be arranged on second thermistor 4 on the heat radiator 7, first resistance R 1, second resistance R 2, differential operational amplifies and power amplification circuit 5 and display circuit 6 compositions, the chain of command 3-1 of refrigerator 3 closely contacts with the surface of black matrix 1, the radiating surface 3-2 of refrigerator 3 closely contacts with the surface of heat radiator 7, one end of first resistance R 1 is connected with power supply+Ec, one end of the other end of first resistance R 1 and first thermistor 2 amplifies with differential operational and is connected with an input end of power amplification circuit 5, the other end ground connection of first thermistor 2, one end of second resistance R 2 is connected with power supply+Ec, one end of the other end of second resistance R 2 and second thermistor 4 amplifies with differential operational and is connected with another input end of power amplification circuit 5, the other end ground connection of second thermistor 4, the input end of the output termination display circuit 6 of differential operational amplification and power amplification circuit 5 and the input end of refrigerator 3, the output head grounding of refrigerator 3.
Claims (1)
1, a kind of light power meter of based semiconductor refrigerator, it is characterized in that it is by the black matrix (1) that absorbs laser energy, be arranged on first thermistor (2) in the black matrix (1), refrigerator (3), heat radiator (7), be arranged on second thermistor (4) on the heat radiator (7), first resistance (R1), second resistance (R2), differential operational amplifies and power amplification circuit (5) and display circuit (6) composition, the chain of command (3-1) of refrigerator (3) closely contacts with the surface of black matrix (1), the radiating surface (3-2) of refrigerator (3) closely contacts with the surface of heat radiator (7), one end of first resistance (R1) and power supply (+Ec) be connected, one end of the other end of first resistance (R1) and first thermistor (2) amplifies with differential operational and is connected with an input end of power amplification circuit (5), the other end ground connection of first thermistor (2), one end of second resistance (R2) and power supply (+Ec) be connected, one end of the other end of second resistance (R2) and second thermistor (4) amplifies with differential operational and is connected with another input end of power amplification circuit (5), the other end ground connection of second thermistor (4), the input end of the output termination display circuit (6) of differential operational amplification and power amplification circuit (5) and the input end of refrigerator (3), the output head grounding of refrigerator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031324363A CN1320339C (en) | 2003-06-12 | 2003-06-12 | Luminous power meter based on semiconductor refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031324363A CN1320339C (en) | 2003-06-12 | 2003-06-12 | Luminous power meter based on semiconductor refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1514214A CN1514214A (en) | 2004-07-21 |
| CN1320339C true CN1320339C (en) | 2007-06-06 |
Family
ID=34239860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031324363A Expired - Fee Related CN1320339C (en) | 2003-06-12 | 2003-06-12 | Luminous power meter based on semiconductor refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1320339C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5316380A (en) * | 1991-12-26 | 1994-05-31 | Ephraim Secemski | Laser power meter |
| CN1103485A (en) * | 1993-06-17 | 1995-06-07 | 新路德公司 | Pocket size laser power meter |
| CN2225670Y (en) * | 1995-04-07 | 1996-04-24 | 徐贵道 | Passive pocket laser power meter |
| WO2002014791A2 (en) * | 2000-08-16 | 2002-02-21 | Ophir Optronics Ltd. | Fast response optical power meter |
-
2003
- 2003-06-12 CN CNB031324363A patent/CN1320339C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5316380A (en) * | 1991-12-26 | 1994-05-31 | Ephraim Secemski | Laser power meter |
| CN1103485A (en) * | 1993-06-17 | 1995-06-07 | 新路德公司 | Pocket size laser power meter |
| CN2225670Y (en) * | 1995-04-07 | 1996-04-24 | 徐贵道 | Passive pocket laser power meter |
| WO2002014791A2 (en) * | 2000-08-16 | 2002-02-21 | Ophir Optronics Ltd. | Fast response optical power meter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1514214A (en) | 2004-07-21 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070606 Termination date: 20110612 |