CN210835430U - Optical system for converting light source into uniform linear light source based on composite ellipsoidal cavity expansion - Google Patents
Optical system for converting light source into uniform linear light source based on composite ellipsoidal cavity expansion Download PDFInfo
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- CN210835430U CN210835430U CN201921671579.9U CN201921671579U CN210835430U CN 210835430 U CN210835430 U CN 210835430U CN 201921671579 U CN201921671579 U CN 201921671579U CN 210835430 U CN210835430 U CN 210835430U
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Abstract
The utility model discloses a change even line source optical system based on compound ellipsoid chamber extension light source, including high-power Lambert body light source LED, compound ellipsoid reflection spotlight chamber, high-power Lambert body light source LED light beam divergence angle is 124, and average radiant flux density is 18.4W/cm2The maximum radiation intensity is 3W/sr, the light of the high-power Lambert light source LED is emitted from a first focus (left focus) of the composite ellipsoidal reflective light-gathering cavity, the light is reflected and gathered by a composite ellipsoidal surface with complete reflection characteristic to achieve the purpose of converting an extended light source into a linear light source, and a receiving surface near a second focus is 10mm long,Linear spot with effective full width at half maximum of 3mm and uniformity of 89.29%.
Description
Technical Field
The utility model belongs to the technical field of optical design, in particular to change even line source optical system based on compound ellipsoid chamber extension light source.
Background
At present, a side pumping structure is simple, performance is stable, uniform pumping is easier to realize to improve the quality of laser output beams compared with end pumping, linear array LD side pumping is mostly adopted for obtaining uniform pumping, but because the distribution of pumping light is not uniform, the gain distribution in a working substance is difficult to be matched with the intrinsic fundamental mode of a laser resonant cavity, meanwhile, a mixed pumping mode is mostly adopted for increasing the light collection efficiency of a sunlight pumping laser, but the pumping light cannot be uniformly coupled with a laser medium rod, researchers such as Da weiLiang and Zhao Changming adopt a non-imaging optical system design method to obtain a better uniform coupling effect so as to improve the quality of the laser output beams, and therefore, the design of a uniform line source side pumping light collection system is necessary for realizing the uniform line source side pumping light collection system by similar point light spots and Fresnel lens convergence solar light spots after LD area array coupling.
Disclosure of Invention
The utility model aims at providing a change even line light source optical system based on compound ellipsoid chamber extension light source, through size and the rotation angle that changes each ellipsoid, can realize obtaining the even line light source that the irradiation degree of consistency reaches 89.29% on near the accepting surface of second focus.
In order to achieve the above object, the utility model adopts the following technical scheme: a light source optical system based on a composite ellipsoidal cavity extended light source to uniform line comprises a single high-power Lambert light source LED, wherein the beam divergence angle of the single high-power LED is 124 degrees, and the average radiant flux density is 18.4W/cm2The maximum radiation intensity is 3W/sr, and the LED high-power lambertian body light source is characterized by further comprising a composite ellipsoid reflection light-gathering cavity, wherein the single high-power lambertian body light source LED is arranged at the common focus of the composite ellipsoid reflection light-gathering cavity.
The composite ellipsoid reflection light-gathering cavity is formed by compounding five ellipsoids with similar sizes by taking a first focus as a common focus and a second focus as a center and rotating around an x axis and a y axis by different angles respectively, the light fluxes on all reflection surfaces are the same by changing the rotation angles of the ellipsoids to change the areas of the reflected light rays of the ellipsoids, the light fluxes of all light spots after final focusing are the same to form uniform light spots, and corresponding parameters of the five ellipsoids in the ellipsoid cavity, namely delta in the M ellipsoid00, firstThe focal coordinates are (0,0,10), the second focal coordinates are (0,0,51), the central coordinates of the line light source are (0,0.43,51.5), and the focal coordinates are L1In ellipsoid of Δ1The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line source center coordinate is (-2,0.43,51.5), and at R, the first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), and the line source center coordinate is (-2,0.43,51.5)1In ellipsoid of Δ1The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line light source center coordinate is (2,0.43,51.5), and L is equal to 02In ellipsoid of Δ20.27, the first focus coordinate is (0,0,9.73), the second focus coordinate is (0,0,50.73), and the line source center coordinate is (-4,0.43,51.5), at R2In ellipsoid of Δ20.27, the first focus coordinate is (0,0,9.73), the second focus coordinate is (0,0,50.73), and the line source center coordinate is (4,0.43,51.5), where Δ0、Δ1、Δ2Are respectively M, L1R1And L2R2The variation parameters of the ellipsoid, delta ranges are all (0, a)0-c0)，a0Is the half-axis length of the corresponding ellipsoid in the z-direction, c0Is the focal length of the corresponding ellipsoid in the z-direction, where0、Δ1、Δ2The larger the ellipsoid, the smaller the major axis of the corresponding ellipsoid, and the smaller the effective area of the ellipsoid irradiated by the LED light source.
Compared with the prior art, the utility model has the advantages of:
1. the optical characteristics of two focuses of the ellipsoidal cavity are utilized to improve the uniformity of the linear light source;
2. after the extended light source is reflected by the composite ellipsoidal reflection light-gathering cavity, a uniform line light source with the irradiation uniformity of 89.29% is obtained on the receiving surface.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of an optical system of the composite ellipsoidal reflective light-gathering cavity according to the present invention.
Detailed Description
Referring to fig. 1, the present invention provides an optical system for converting light into uniform linear light source based on the extended light source of composite ellipsoid cavity, which is formed by arranging composite ellipsoid reflectionThe divergence angle of the light beam at the common focus of the light-gathering cavity is 124 degrees, and the average radiant flux density is 18.4W/cm2The light beam emitted by a single high-power Lambert light source LED with the maximum radiation intensity of 3W/sr is reflected by the composite ellipsoid reflection light-gathering cavity, and then a uniform line light source with the irradiation uniformity of 89.29 percent is obtained on a receiving surface near the second focus of the composite ellipsoid reflection light-gathering cavity.
The composite ellipsoid reflection light-gathering cavity is formed by compounding five ellipsoids with similar sizes by taking a first focus as a common focus and a second focus as a center and rotating around an x axis and a y axis by different angles respectively, the light fluxes on all reflection surfaces are the same by changing the rotation angles of the ellipsoids to change the areas of the reflected light rays of the ellipsoids, the light fluxes of all light spots after final focusing are the same to form uniform light spots, and corresponding parameters of the five ellipsoids in the ellipsoid cavity, namely delta in the M ellipsoid0The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line light source center coordinate is (0,0.43,51.5), and L is equal to 01In ellipsoid of Δ1The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line source center coordinate is (-2,0.43,51.5), and at R, the first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), and the line source center coordinate is (-2,0.43,51.5)1In ellipsoid of Δ1The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line light source center coordinate is (2,0.43,51.5), and L is equal to 02In ellipsoid of Δ20.27, the first focus coordinate is (0,0,9.73), the second focus coordinate is (0,0,50.73), and the line source center coordinate is (-4,0.43,51.5), at R2In ellipsoid of Δ20.27, the first focus coordinate is (0,0,9.73), the second focus coordinate is (0,0,50.73), and the line source center coordinate is (4,0.43,51.5), where Δ0、Δ1、Δ2Are respectively M, L1R1And L2R2The variation parameters of the ellipsoid, delta ranges are all (0, a)0-c0)，a0Is the half-axis length of the corresponding ellipsoid in the z-direction, c0Is the focal length of the corresponding ellipsoid in the z-direction, where0、Δ1、Δ2The larger, the smaller the major axis of the corresponding ellipsoid,the smaller the effective area of the ellipsoid illuminated by the LED light source.
According to the scheme, the optical system for converting the extended light source based on the composite ellipsoid reflection light-gathering cavity into the linear light source is designed, and the uniform linear light source with the irradiation uniformity reaching 89.29% can be obtained on the receiving surface near the second focus by changing the size and the rotation angle of each ellipsoid.
Claims (5)
1. A light source optical system based on a composite ellipsoidal cavity extended light source and capable of uniformly rotating comprises a single high-power LED, wherein the divergence angle of a light beam of the single high-power LED is 124 degrees, and the average radiant flux density is 18.4W/cm2The maximum radiation intensity is 3W/sr, and the device is characterized by further comprising a composite ellipsoid reflection light-gathering cavity.
2. The system of claim 1, wherein the composite ellipsoidal reflective light collection cavity is configured to reflect light from the extended light source and form a uniform line light source near a second focus of the composite ellipsoidal reflective light collection cavity, and the composite ellipsoidal reflective light collection cavity is made of glass and has a surface coated with a fully reflective film.
3. The compound ellipsoidal cavity-based extended light source to uniform line light source optical system of claim 1, wherein the single high power LED is placed at the common focus of the compound ellipsoidal reflective collection cavity.
4. The system of claim 2, wherein the compound ellipsoidal cavity extended light source uniform line light source optical system is formed by combining five ellipsoids with similar sizes, the first focus of the five ellipsoids serving as a common focus, and the second focus of the five ellipsoids rotating around the x-axis and the y-axis at different angles around the first focus.
5. The compound ellipsoidal cavity extended light source-to-uniform line light source-based optical system of claim 2, wherein the optical system is characterized in thatThe corresponding parameters of five ellipsoids in the reflecting light-gathering cavity of the compound ellipsoid, namely delta in M ellipsoid0The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line light source center coordinate is (0,0.43,51.5), and L is equal to 01In ellipsoid of Δ1The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line source center coordinate is (-2,0.43,51.5), and at R, the first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), and the line source center coordinate is (-2,0.43,51.5)1In ellipsoid of Δ1The first focus coordinate is (0,0,10), the second focus coordinate is (0,0,51), the line light source center coordinate is (2,0.43,51.5), and L is equal to 02In ellipsoid of Δ20.27, the first focus coordinate is (0,0,9.73), the second focus coordinate is (0,0,50.73), and the line source center coordinate is (-4,0.43,51.5), at R2In ellipsoid of Δ20.27, the first focus coordinate is (0,0,9.73), the second focus coordinate is (0,0,50.73), and the line source center coordinate is (4,0.43,51.5), where Δ0、Δ1、Δ2Are respectively M, L1R1And L2R2The variation parameters of the ellipsoid, delta ranges are all (0, a)0-c0)，a0Is the half-axis length of the corresponding ellipsoid in the z-direction, c0Is the focal length of the corresponding ellipsoid in the z-direction, where0、Δ1、Δ2The larger the ellipsoid, the smaller the major axis of the corresponding ellipsoid, and the smaller the effective area of the ellipsoid irradiated by the LED light source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921671579.9U CN210835430U (en) | 2019-10-09 | 2019-10-09 | Optical system for converting light source into uniform linear light source based on composite ellipsoidal cavity expansion |
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| CN201921671579.9U CN210835430U (en) | 2019-10-09 | 2019-10-09 | Optical system for converting light source into uniform linear light source based on composite ellipsoidal cavity expansion |
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Granted publication date: 20200623 Termination date: 20201009 |