CN201149525Y - Apparatus for measuring three dimensional distribution of scattered light field - Google Patents
Apparatus for measuring three dimensional distribution of scattered light field Download PDFInfo
- Publication number
- CN201149525Y CN201149525Y CNU2008200281664U CN200820028166U CN201149525Y CN 201149525 Y CN201149525 Y CN 201149525Y CN U2008200281664 U CNU2008200281664 U CN U2008200281664U CN 200820028166 U CN200820028166 U CN 200820028166U CN 201149525 Y CN201149525 Y CN 201149525Y
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- boring
- hemispherical shell
- lens
- disk
- light field
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Abstract
The utility model relates to a device, which can measure the three-dimensional distribution of a radiating light field and is characterized in that the device includes a drilling hemispherical shell 1, optical fibers 2, a drilling disc 3, an adjustable diaphragm 6, a lens 5 and a CCD camera 4. The adjustable diaphragm 6 is arranged at the bottom of the device, the drilling hemispherical shell 1 is arranged on the adjustable diaphragm 6, the drilling disc 3 is arranged on the drilling hemispherical shell 1 and the drilling disc 3 is connected with the drilling hemispherical shell 1 by a plurality of optical fibers, the lens 5 is positioned on the drilling disc 3, and the CCD camera 4 is arranged on the lens 5. The device has the beneficial effect that the device can measure the spatial distribution of the light source radiating light field rapidly by using the optical fibers and the planar array CCD camera. The exposure time of the CCD camera is adjustable and the reflection distribution of a plurality of different strength magnitude orders can be measured accurately. The device integrates a power supply, a light source, a testing light path, and adjustment, storage and control units into a compact whole for facilitating real-time online measurement and field measurement.
Description
Technical field
The present invention relates to a kind of device of measuring radiation light field distributed in three dimensions, the field that is specifically related to utilize Optical Fiber Transmission and measures the three-dimensional radiation optical field distribution by array type detector.
Background technology
Existing radiant light field distribution measuring mehtod mainly is to utilize one or more photodetectors to make two dimension or one-dimensional scanning in the testing sample surface, the light intensity of each observation angle is surveyed in pointwise, paper " An equipment for measuring 3D bi-directional scattering distribution function ofblack painted and differently machined surfaces " (Proc.of SPIE as M.Barilli and A.Mazzoni, 59620L, 2005).This method explorer response scope is bigger, cooperate subsequent conditioning circuit can realize the accurate measurement of arbitrarily angled place reflective light intensity, its shortcoming is consuming time many, can improve measuring speed though adopt the computer control autoscan to measure, but still can not realize real-time on-line measurement, and be affected because of light source output power and detector responsivity change easily in the measuring process, repeatability is relatively poor.
Summary of the invention
The technical matters that solves
For fear of the micropodia part of prior art, the present invention proposes a kind of device of measuring radiation light field distributed in three dimensions, and problem to be solved mainly contains: 1. system should be able to finish the radiant light field measurement in the short period of time.2. the reproducibility error of system is less.3. system can accurately measure the radiation light intensity in a big way.4. system should be able to realize the three-dimension distribution of whole hemisphere space radiation light field.5. system should conveniently carry out field survey.
Technical scheme
A kind of device of measuring radiation light field distributed in three dimensions is characterized in that: the composition of device comprises boring hemispherical Shell 1, optical fiber 2, boring disk 3, adjustable diaphragm 6, lens 5 and CCD camera 4; Adjustable diaphragm 6 is positioned at bottom of device, and boring hemispherical Shell 1 is positioned on the adjustable diaphragm 6, and boring disk 3 is positioned on the boring hemispherical Shell 1, connects by some optical fiber between the two, and lens 5 are positioned on the disk 3, and CCD camera 4 is positioned on the lens 5; The lower surface of described adjustable diaphragm 6 overlaps with the equatorial plane of boring hemispherical Shell 1, and the center of adjustable diaphragm 6 lower surfaces overlaps with the centre of sphere of boring hemispherical Shell 1; Described boring hemispherical Shell 1, optical fiber 2, boring disk 3, adjustable diaphragm 6, lens 5 and imaging system are along the coaxial distribution of device main shaft; Number of perforations on described boring hemispherical Shell 1 and the boring disk 3 equates and evenly distributes, number of fibers equal to hole hole count on the hemispherical Shell and the hole count on the disk.
The distance at pitch-row on the described boring disk 3 boring disk 3 centers is proportional to the axis in the hole on the boring hemispherical Shell 1 and the angle of device main shaft, and the axis of two corresponding apertures and shaft axis of optic fibre are in same plane.
Described lens 5 arrive the two focus length of the distance of boring disk 3 greater than lens 5, and the aperture of lens 5 is greater than the diameter of boring disk 3.
Described CCD camera 4 target surfaces are apart between 1 times of focal length to 2 times focal length of lens.
The aperture of circular hole and the equal diameters of optical fiber 2 on the aperture of the circular hole 7 on the described boring hemispherical Shell 1 and the boring disk 3.
Two end faces 8 of described described optical fiber 2 install the GRIN Lens with fiber-coaxial additional for the design of convex optically focused or at the optical fiber two ends.
The inwall coating black light-absorbing coating of the inwall of described boring hemispherical Shell 1 and circular hole 7.
Described adjustable diaphragm 6 adopts the rotary vane type diaphragm.
Beneficial effect
Beneficial effect of the present invention is to adopt optical fiber and area array CCD camera measurement light source radiation light field space distribution apace.The CCD camera exposure time is adjustable, can distribute to the reflection of a plurality of varying strength magnitudes accurately to measure.Whole device current collection source, light source, optical system for testing, adjusting, storage and control module make things convenient for real-time online measuring and field survey in the integral body of a compactness.
Description of drawings
Fig. 1 is the cut-open view of radiation light field three-dimension distribution device of the present invention;
Fig. 2 is the vertical view of boring hemispherical Shell among the present invention;
Fig. 3 is the local amplification view that optical fiber inserts boring hemispherical Shell place among the present invention;
Fig. 4 is the vertical view of adjustable diaphragm among the present invention;
Fig. 5 is the bottom amplification view of radiation light field three-dimension distribution device shown in Figure 1;
The 1-hemispherical Shell of holing; 2-optical fiber; The 3-disk of holing; The 4-CCD camera; The 5-lens; The 6-adjustable diaphragm; The 7-circular hole; The 8-end face; The 9-perforate; 10-light source to be measured.
Embodiment
Now in conjunction with the accompanying drawings the present invention is further described:
Embodiment 1: radiation light field three-dimension distribution device as shown in Figure 1 comprises boring hemispherical Shell 1, optical fiber 2, boring disk 3, adjustable diaphragm 6 and imaging system.All component is along the coaxial distribution of device main shaft, adjustable diaphragm 6 is positioned at bottom of device, boring hemispherical Shell 1 is positioned on the adjustable diaphragm 6, and the lower surface of adjustable diaphragm 6 overlaps with the equatorial plane of boring hemispherical Shell 1, and the center of adjustable diaphragm 6 lower surfaces overlaps with the centre of sphere of boring hemispherical Shell 1.Boring disk 3 is positioned on the boring hemispherical Shell 1, connect by some optical fiber between the two, number of fibers equal to hole hole count on the hemispherical Shell and the hole count on the disk, lay respectively at disk 3 with boring hemispherical Shell 1 on and for same two holes that optical fiber was connected corresponding, be that the distance at pitch-row disk 3 centers on the disk 3 is proportional to the axis in the hole on the boring hemispherical Shell 1 and the angle (zenith angle) of device main shaft, and the axis of two corresponding apertures and shaft axis of optic fibre are in same plane.Lens 5 are positioned on the disk 3, and to the distance of disk 3 two focus length greater than lens 5, the aperture of lens 5 is greater than the diameter of disk 3, can guarantee that all light beams of fiber end face outgoing from the disk can both be received by lens 5.CCD camera 4 is positioned on the lens 5, and the CCD target surface is apart between 1 times of focal length to 2 times focal length of lens, and the fiber end face on the disk 3 images in the CCD target surface.This device is fit to measure the optical radiation angle distribution of light emitting diode small size light sources such as (LED), can also be used to measure the display viewing angles characteristic.During the measurement light source radiation profiles light source 10 to be measured placed boring hemispherical Shell sphere center position place, and the size of regulating adjustable diaphragm 6 makes the size of its center pit 9 equal the size of light source 10 to be measured to prevent the interference of external environment light, shown in Fig. 1 and Fig. 6 A, select the suitable time shutter according to the size of radiation of light source intensity then, by 4 records of CCD camera down light source all angles in whole hemisphere space the radiation light intensity and be stored in the entrained storage card of camera.
The measurement of described radiation of light source light field distributed in three dimensions: the centre of sphere place that light source 10 to be measured is placed boring hemispherical Shell 1, regulating adjustable diaphragm 6 makes the size of its interstitial hole 9 suitable with light source to be measured 10, adjustable diaphragm 6 has stopped the influence of external environment light, and its surface is a light-absorbing coating.Transferred to disk 3 places and imaged on the CCD camera 4 by lens 5 through optical fiber 2 by the light of radiation of light source, the time shutter of CCD camera 4 can be regulated to adapt to different radiation of light source intensity.
Fig. 3 has represented that optical fiber one end inserts the situation of boring hemispherical Shell 1, and the aperture that fibre diameter equals circular hole 7 is 1mm.Fiber end face 8 has a segment distance apart from boring hemispherical Shell 1 inwall, and the circular-hole internal-wall blacking, has limited incident light like this and received direction of light and weakened fiber end face to reflect the interference that causes.Fiber end face is a convex lens shape, can incident beam and receiving beam be assembled not using under the condition that adds lens, makes radiation and reflection measurement more accurate.
Fig. 5 has described the specific implementation process of measuring radiation light field distributed in three dimensions, the present invention is particularly suitable for measuring the optical radiation space distribution as small-sized luminophors such as LED, can in less than 1 second time, record the radiant light field distribution in the whole hemisphere space, get rid of the influence of light source power fluctuation.
Crust of the device of the present invention adopts the encapsulation of rigidity preferred metal shell, and outer casing inner wall coating black light-absorbing coating is provided with light source position adjusting and diaphragm regulating device and can shows regulated value on the shell.
Claims (9)
1. the device of a measuring radiation light field distributed in three dimensions is characterized in that: the composition of device comprises boring hemispherical Shell (1), optical fiber (2), boring disk (3), adjustable diaphragm (6), lens (5) and CCD camera (4); Adjustable diaphragm (6) is positioned at bottom of device, boring hemispherical Shell (1) is positioned on the adjustable diaphragm (6), and boring disk (3) is positioned on the boring hemispherical Shell (1), connects by some optical fiber between the two, lens (5) are positioned on the disk (3), and CCD camera (4) is positioned on the lens (5); The lower surface of described adjustable diaphragm (6) overlaps with the equatorial plane of boring hemispherical Shell (1), and the center of adjustable diaphragm (6) lower surface overlaps with the centre of sphere of boring hemispherical Shell (1); Described boring hemispherical Shell (1), optical fiber (2), boring disk (3), adjustable diaphragm (6), lens (5) and imaging system are along the coaxial distribution of device main shaft; Number of perforations in described boring hemispherical Shell (1) and boring disk (3) equates and evenly distributes, number of fibers equal to hole hole count on the hemispherical Shell and the hole count on the disk.
2. the device of measuring radiation light field distributed in three dimensions according to claim 1, it is characterized in that: the distance at pitch-row on the described boring disk (3) boring disk (3) center is proportional to the axis in the hole on the boring hemispherical Shell (1) and the angle of device main shaft, and the axis of two corresponding apertures and shaft axis of optic fibre are in same plane.
3. the device of measuring radiation light field distributed in three dimensions according to claim 1 is characterized in that: described lens (5) arrive the two focus length of the distance of boring disk (3) greater than lens (5), and the aperture of lens (5) is greater than the diameter of boring disk (3).
4. the device of measuring radiation light field distributed in three dimensions according to claim 1 is characterized in that: described CCD camera (4) target surface is apart between 1 times of focal length to 2 times focal length of lens.
5. the device of measuring radiation light field distributed in three dimensions according to claim 1, it is characterized in that: the circular hole (7) on the described boring hemispherical Shell (1) evenly distributes along boring hemispherical Shell (1) surface, desirable 0.5mm～the 2mm in aperture, desirable 1mm～the 2mm of pitch of holes, the axle of all circular holes (7) is perpendicular to boring hemispherical Shell (1) surface and point to the centre of sphere.
6. the device of measuring radiation light field distributed in three dimensions according to claim 1 is characterized in that: the aperture of circular hole and the equal diameters of optical fiber (2) are gone up with boring disk (3) in the aperture of the circular hole (7) on the described boring hemispherical Shell (1).
7. the device of measuring radiation light field distributed in three dimensions according to claim 1 is characterized in that: two end faces (8) of described described optical fiber (2) install the GRIN Lens with fiber-coaxial additional for the design of convex optically focused or at the optical fiber two ends.
8. the device of measuring radiation light field distributed in three dimensions according to claim 1 is characterized in that: the inwall coating black light-absorbing coating of the inwall of described boring hemispherical Shell (1) and circular hole (7).
9. the device of measuring radiation light field distributed in three dimensions according to claim 1 is characterized in that: described adjustable diaphragm (6) adopts the rotary vane type diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200281664U CN201149525Y (en) | 2008-01-22 | 2008-01-22 | Apparatus for measuring three dimensional distribution of scattered light field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200281664U CN201149525Y (en) | 2008-01-22 | 2008-01-22 | Apparatus for measuring three dimensional distribution of scattered light field |
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| Publication Number | Publication Date |
|---|---|
| CN201149525Y true CN201149525Y (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200281664U Expired - Lifetime CN201149525Y (en) | 2008-01-22 | 2008-01-22 | Apparatus for measuring three dimensional distribution of scattered light field |
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| CN (1) | CN201149525Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101580A (en) * | 2014-07-25 | 2014-10-15 | 中国工程物理研究院应用电子学研究所 | BRDF quick measuring device based on hemisphere array detection |
| CN104374545A (en) * | 2013-08-13 | 2015-02-25 | 中国计量学院 | Optical fiber imaging rapid optical parameter tester |
| CN110986771A (en) * | 2019-12-12 | 2020-04-10 | 天目爱视（北京）科技有限公司 | Concave 3D information acquisition and measurement equipment based on optical fiber bundle |
-
2008
- 2008-01-22 CN CNU2008200281664U patent/CN201149525Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374545A (en) * | 2013-08-13 | 2015-02-25 | 中国计量学院 | Optical fiber imaging rapid optical parameter tester |
| CN104101580A (en) * | 2014-07-25 | 2014-10-15 | 中国工程物理研究院应用电子学研究所 | BRDF quick measuring device based on hemisphere array detection |
| CN110986771A (en) * | 2019-12-12 | 2020-04-10 | 天目爱视（北京）科技有限公司 | Concave 3D information acquisition and measurement equipment based on optical fiber bundle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080122 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |