CN101603859B - Femtojoule level laser micro energy meter - Google Patents
Femtojoule level laser micro energy meter Download PDFInfo
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- CN101603859B CN101603859B CN2009100895557A CN200910089555A CN101603859B CN 101603859 B CN101603859 B CN 101603859B CN 2009100895557 A CN2009100895557 A CN 2009100895557A CN 200910089555 A CN200910089555 A CN 200910089555A CN 101603859 B CN101603859 B CN 101603859B
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Abstract
The invention relates to a femtojoule level laser micro energy meter, in particular to a femtojoule level laser micro energy meter with an observation system, and belongs to the technical field of laser measurement. The femtojoule level laser micro energy meter with the observation system comprises an optical system, a detection system and a signal processing and display system, wherein the optical system consists of three parallel lenses, an ocular lens and a rotating planar reflector; the three lenses are coaxial; the arrangement order of the three lenses and the rotating planar reflector is a convex lens, a convex lens, a concave lens and the rotating planar reflector; the center of the rotating planar reflector is positioned in optical axes of the three parallel lenses; and the three lenses, the rotating planar reflector and the ocular lens form a telescope system. The femtojoule level laser micro energy meter with the observation system has the measuring range between 2.2 and 5*10<5>fJ/cm<2>, performs optical energy measurement on a target, and measures the target in a distance from 3m to infinite.
Description
Technical field
The present invention relates to a kind of little energy meter of burnt level laser that flies, belong to the laser measuring technique field.
Technical background
Along with the appearance of products such as laser guidance, laser ranging, the detection of laser far-distance target diffuse reflection backward energy also puts on the agenda in recent years, and it receives the minimum value of luminous energy all at several fJ/cm
2
The minimum measurable energy of the little energy meter of present existing pulse laser is 800fJ/cm
2, be China National Measuring Science Research Inst. in the product of development in recent years, its shortcoming be not energy measurement less than 800fJ/cm
2Energy, it is made up of detector and signal Processing and display system.
In the world, according to the report of American National Standards Institute, by the bore of expansion reference laser beam interferes and the method for wedge beam splitting, having set up the least energy standard is 2.6fJ/cm in its national standard laboratory
2System, the energy receiver of this system has adopted avalanche photodide detector (APD), it highly sensitive, need under the environment of the operating voltage of 400V and constant temperature, carry out work, so it is uncomfortable as the general little energy meter of pulse laser, it is not observed yet, sighting device, can not detect distant object pulse laser diffuse reflection echoed signal, can not be in outdoor application.
The present invention has introduced optical system and added recording geometry in this system in the little energy meter of laser, by synchronous-focusing, the little energy meter of laser can be observed and the run-home thing, thereby reaches the purpose of accurate measurement target thing energy.
Summary of the invention
The objective of the invention is for solve of the prior art fly the little energy meter of burnt level laser not energy measurement less than 800fJ/cm
2Energy, the problem that can not observe and aim at target, a kind of little energy meter of burnt level laser that flies has been proposed, fly the little energy meter of burnt level laser and pass through synchronous-focusing, the little energy meter of laser can be observed and the run-home thing, thereby reach the purpose of accurate measurement target thing energy, but the distance of measurement target is 1m～∞, can accurately measures 2.2fJ/cm
2～5*10
5FJ/cm
2Laser energy.Of the present invention a kind of have optical system and a recording geometry fly the little energy meter of burnt level laser, its measurement energy range is 2.2fJ/cm
2～5*10
5FJ/cm
2, it can observe and aim at target, and the distance of measurement target is 1m～∞.
The objective of the invention is to be achieved through the following technical solutions.
A kind of little energy meter of burnt level laser that flies of the present invention, comprise optical system, detection system and signal Processing and display system, luminous energy focuses on luminous energy on the detector of detection system by optical system, and detector is converted to electric signal to light signal, and entering signal is handled and display system then; Wherein optical system is made up of first convex lens, second convex lens, concavees lens, rotary plane reflecting mirror and eyepiece, three lens are coaxial side by side, three lens and putting in order of rotary plane reflecting mirror are first convex lens, second convex lens, concavees lens and rotary plane reflecting mirror, the center of rotary plane reflecting mirror is on the optical axis of side by side three lens, three lens, rotary plane reflecting mirror and eyepieces form a telescopic system, and object is observed; Three lens and detector form a detection system, and the energy of object is measured; Wherein the diameter of first convex lens is more than 202mm reaches.
Detector and three lens combination are coaxial, and can relatively move, the center of the test surface of detector need be positioned on the focus point of three lens combination, because light source is different with the distance that flies the little energy meter of burnt level laser, three lens will be different to the focus point of energy, can be by the relatively moving of three lens combination and detector, make on the focus point that is centered close to three lens combination of test surface of detector, be used to receive luminous energy, target is carried out optical power measurement from optical system output.
The angle of the minute surface of rotary plane reflecting mirror and three blocks of lens combination optical axises greater than 0 °, during less than 90 °, three lens combination, rotary plane reflecting mirror and eyepieces form telescopic systems, and object is observed, the distance of measurement target is 1m～∞; Then rotary plane reflecting mirror is rotated and makes its optical axis with lens parallel, three lens combination become measuring system with detector row, and the energy of object is measured, and the energy of measurement target thing is 2.2fJ/cm
2～5*10
5FJ/cm
2
Graticule 6 equates with the distance of detector to the rotary plane reflecting mirror center to the distance at rotary plane reflecting mirror center on the eyepiece; Eyepiece, rotary plane reflecting mirror and detector are as a whole, can move with respect to lens combination is whole, reach the purpose of synchronous-focusing.
The little energy meter of burnt level laser that flies of the present invention is furnished with L type bent plate and tripod, is placed on the worktable during work or is placed on the tripod, realizes that indoor or outdoors is measured to use.
Beneficial effect
(1) measurement range that flies the little energy meter of burnt level laser with recording geometry is 2.2fJ/cm
2～5*10
5FJ/cm
2
When (2) plane of rotary plane reflecting mirror was parallel with the optical axis of lens, three lens combination and detector can relatively move along optical axis, make detector on the focus point of three lens, and target is carried out optical power measurement, and the distance of measurement target is 1m～∞;
(3) angle of the minute surface of rotary plane reflecting mirror and three blocks of lens combination optical axises greater than 0 °, during less than 90 °, three lens combination, rotary plane reflecting mirror and eyepieces form telescopic systems, and object is observed and aimed at;
(4) the little energy meter of burnt level laser that flies with recording geometry is measured use at indoor or outdoors;
(5) eyepiece, rotary plane reflecting mirror and detector are as a whole, can move with respect to lens combination is whole along optical axis, by synchronous-focusing, the little energy meter of laser can be observed and the run-home thing, thereby reach the purpose of accurate measurement target thing energy.
Description of drawings
Fig. 1 is that the system that flies the little energy meter of burnt level laser forms;
Fig. 2 is an optical system diagram; Wherein, 1-first convex lens, 2-second convex lens, 3-concavees lens, 4-rotary plane reflecting mirror, 5-detector, the graticule of 6-eyepiece, 7-eyepiece.
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
The little energy meter of burnt level laser that flies of the present invention comprises optical system, detection system and signal Processing and display system, as shown in Figure 1; Wherein optical system is made up of first convex lens 1, second convex lens 2, concavees lens 3, eyepiece 7 and rotary plane reflecting mirror 4, three lens are coaxial, and three lens and putting in order of rotary plane reflecting mirror 4 are first convex lens 1, second convex lens 2, concavees lens 3 and rotary plane reflecting mirror 4; The center of rotary plane reflecting mirror 4 is on the optical axis of side by side three lens, and three lens, rotary plane reflecting mirror 4 form telescopic systems with eyepieces 7, can observe and aim at object.Light source focuses on luminous energy on the detector 5 of detection system by optical system, and detector 5 is converted to electric signal to light signal, and entering signal is handled and display system then.
Distance in the optical system between first convex lens 1 and second convex lens 2 is 130mm, distance between second convex lens 2 and the concavees lens 3 is 0.15mm, distance between concavees lens 3 and the rotary plane reflecting mirror 4 is 118mm, wherein the first convex lens diameter is 202mm, focal length is 434mm, and the second convex lens diameter is 134mm, and focal length is 183mm, the concavees lens diameter is 120mm, and focal length is-187mm; The combined focal length of three lens side by side is 340mm; Detector 5 is placed on the focal plane of combined focal length of three lens, and the center of detector 5 enters detector 5 after three lens of luminous energy through optical system on the optical axis of three lens, and optical system diagram as shown in Figure 2.
When the angle of the minute surface of rotary plane reflecting mirror 4 and three blocks of lens combination optical axises is 45 °, three lens, rotary plane reflecting mirror 4 and eyepieces 7 form a telescopic system, light source is observed and aimed at, determine object, then rotary plane reflecting mirror 4 being rotated makes its plane take out parallel with the light of lens, lens combination and detector 5 form a detection system, reach the purpose of measurement target thing energy, and the least energy of the object of measurement is 2.2fJ/cm
2
Claims (2)
1. one kind flies the little energy meter of burnt level laser, comprises detection system and signal Processing and display system, it is characterized in that also comprising optical system; Wherein optical system is made up of first convex lens (1), second convex lens (2), concavees lens (3), rotary plane reflecting mirror (4) and eyepiece (7); Three lens are coaxial side by side; Three lens and putting in order of rotary plane reflecting mirror are first convex lens (1), second convex lens (2), concavees lens (3) and rotary plane reflecting mirror (4), and the center of rotary plane reflecting mirror is on the optical axis of side by side three lens; Graticule on the eyepiece (6) equates with the distance of detector (5) to the rotary plane reflecting mirror center to the distance at rotary plane reflecting mirror center; Eyepiece (7), rotary plane reflecting mirror (4) and detector (5) are as a whole, can move along optical axis is whole with respect to lens combination; The minute surface of rotary plane reflecting mirror (4) and the angle of three blocks of lens combination optical axises are greater than 0 °, during less than 90 °, the telescopic system that first convex lens (1), second convex lens (2), concavees lens (3), rotary plane reflecting mirror (4) and eyepiece (7) are formed is used for light source is observed and aimed at; When the plane of rotary plane reflecting mirror (4) was parallel with the optical axis of lens, the system that first convex lens (1), second convex lens (2), concavees lens (3) and detector (5) are formed was used for luminous energy is measured; Light source focuses on luminous energy on the detector of detection system by optical system, and detector is converted to electric signal to light signal, and entering signal is handled and display system then.
2. a kind of little energy meter of burnt level laser that flies according to claim 1 is characterized in that: the diameter of first convex lens is more than 202mm reaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100895557A CN101603859B (en) | 2009-07-23 | 2009-07-23 | Femtojoule level laser micro energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100895557A CN101603859B (en) | 2009-07-23 | 2009-07-23 | Femtojoule level laser micro energy meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101603859A CN101603859A (en) | 2009-12-16 |
| CN101603859B true CN101603859B (en) | 2010-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100895557A Expired - Fee Related CN101603859B (en) | 2009-07-23 | 2009-07-23 | Femtojoule level laser micro energy meter |
Country Status (1)
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141436B (en) * | 2010-12-15 | 2012-07-04 | 北京理工大学 | Femtojoule-level laser micro energy meter having automatic tracking function |
| CN102169015B (en) * | 2010-12-21 | 2012-08-01 | 北京理工大学 | A femtojoule level laser micro energy meter capable of measuring and observing simultaneously |
| CN103453997B (en) * | 2013-09-04 | 2016-09-21 | 中国科学院上海光学精密机械研究所 | Wide spectrum weak pulse measurement of laser energy system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2290040Y (en) * | 1997-04-29 | 1998-09-02 | 王慰平 | Ceramic attenuation type laser energy gauge |
| CN1614368A (en) * | 2004-10-09 | 2005-05-11 | 昆明理工大学 | Laser energy meter with quick responded and wide spectrum band impulsives |
| CN1740761A (en) * | 2005-09-27 | 2006-03-01 | 中国计量科学研究院 | Laser energy meter |
-
2009
- 2009-07-23 CN CN2009100895557A patent/CN101603859B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2290040Y (en) * | 1997-04-29 | 1998-09-02 | 王慰平 | Ceramic attenuation type laser energy gauge |
| CN1614368A (en) * | 2004-10-09 | 2005-05-11 | 昆明理工大学 | Laser energy meter with quick responded and wide spectrum band impulsives |
| CN1740761A (en) * | 2005-09-27 | 2006-03-01 | 中国计量科学研究院 | Laser energy meter |
Non-Patent Citations (2)
| Title |
|---|
| JP昭63-173930A 1988.07.18 |
| JP特开2006-337551A 2006.12.14 |
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| CN101603859A (en) | 2009-12-16 |
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