CN107238037A - A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular - Google Patents

Abstract

The invention discloses a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular.Full-spectrum LED illuminator is wide due to spectral region, rich color, there is a preferable illuminating effect, but be due to its full spectrum optical wavelength range it is wide, easily form aberration, reduce illuminating effect.The uniform full-spectrum LED illuminator of catadioptric diffraction specular disclosed by the invention is by LED lamp bead, refraction optical element, reflective optical devices, diffraction optical element is constituted, using refraction, the mode that reflection and diffraction element coordinate, LED lamp bead sends the light of the full spectrum light source of multi-wavelength's light composition, via refraction optical element, reflective optical devices and diffraction optical element are incided in target face, diffraction optical element therein produces anomalous dispersion, refraction optical element produces normal dispersion, reflective optical devices do not produce dispersion, cancelled out each other after described anomalous dispersion and normal dispersion superposition, color is formed in target face uniformly to illuminate.

Description

A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular

Technical field

The present invention relates to a kind of optical system of LED lamp, and in particular to a kind of uniform full spectrum of catadioptric diffraction specularLED illumination System.

Background technology

With the demand of energy-saving and emission-reduction more and more urgent, LED technology is continued to develop, and light efficiency is improved constantly, and LED illumination is obtainedTo being increasingly widely applied, substitution conventional incandescent, the trend of fluorescent lamp are more and more obvious.LED street lamp is widely used in variousIn the illumination of road.

Free form surface simple lens luminous intensity distribution is used on existing LED street lamp, luminous intensity distribution mostly, there is certain aberration, target faceOn there is yellow circle phenomenon, illuminating color is uneven.

The content of the invention

It is an object of the invention to provide a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular, LED can be shoneBright color homogeneity is obviously improved.

The technical scheme is that：

A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular, the side coordinated using refraction, reflection and diffraction elementFormula, utilizes birefringence dispersion and the spectrum reverse characteristic of diffraction dispersion, correcting chromatic aberration.

A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular, by LED lamp bead, refraction optical element, reflected lightElement, diffraction optical element is learned to constitute.

A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular, it is characterised in that described refraction optical elementWith the integrated catadioptric element of reflective optical devices.

A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular, it is characterised in that described refraction optical elementWith the integrated folding diffraction element of diffraction optical element.

A kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular, it is characterised in that described reflective optical devicesWith the integrated anti-diffraction element of diffraction optical element.

The present invention operation principle be：

Fig. 1 a are focus condition of the refractor to the light of different wave length, and the wherein refractive index of light 1 of the first wavelength is minimum, gathersFocus is farthest, and the light 3 of the third wavelength reflects maximum, and recently, the refractive index of light 2 of second of wavelength is placed in the middle, gathers for focus pointFocus is placed in the middle, and the light of three kinds of wavelength produces normal dispersion.Fig. 1 b are focus condition of the diffraction lens to the light of different wave length, whereinRecently, the focus point of light 3 of the third wavelength is farthest, and the light 2 of second of wavelength is focused on for the focus point of light 1 of the first wavelengthPoint is placed in the middle, and the light of three kinds of wavelength produces anomalous dispersion.

Because normal dispersion is acted on when the surface of lens is to anaclasis, long wavelength's refraction angle is small, short wavelength's refraction angleGreatly, can be because blue light refractive index be big therefore in common LED street lamp illumination, deviation angle is big, and the overall angle of divergence is small, gold-tinted foldingPenetrate rate small, deviation angle is small, overall dispersion angle is big.And when using diffraction lens, the diffraction effect based on light can produce abnormalityDispersion, blue light is that short wavelength's angle of divergence is big, and gold-tinted is that long wavelength's angle of divergence is small.The knot cooperatively formed using diffraction element and lensStructure, then can make two kinds of effects cancel out each other, and form the uniform illumination spot distribution of color.

The beneficial effects of the invention are as follows：

The present invention rolls over diffraction or anti-diffraction structure by integration or separate type, realizes that the color in illumination target is uniformly distributed.

Brief description of the drawings

Below in conjunction with the accompanying drawings and embodiment the invention will be further described：

Fig. 1 a- Fig. 1 c are the schematic diagram of folding diffraction correction aberration；

Wherein 4- lens, 5- fresnel diffraction lens；6- binary optical lenses；

Fig. 2 is the chromatic aberration correction light-distribution lens schematic diagram of anti-diffraction one

In figure：8-LED；9- has the TIR lens of anti-diffraction structure；The anti-diffraction surfaces of 901-；902- transmission planes；10- light；

Fig. 3 is the integral chromatic aberration correction light-distribution lens schematic diagram of folding diffraction；

In figure：8-LED；11- has the TIR lens of folding diffraction structure；1101- reflectings surface；1102- rolls over diffraction surfaces；10- light；

Fig. 4 is intended to for separate type chromatic aberration correcting optical system；

In figure：8-LED；12-TIR lens；1201-TIR reflection from lens faces；1202-TIR lens planes of refraction；13- diffractometers 10-Light.

Embodiment

The invention will be further described below in conjunction with the accompanying drawings.

Embodiment 1

As shown in Fig. 2 the light that LED 8 is sent incides transmission plane after the reflection diffraction of anti-diffraction surfaces 901 of TIR lens 9902, wherein anti-diffraction surfaces 901 produce anomalous dispersion, transmission plane 902 produces normal dispersion, is cancelled out each other after the two superposition, in meshColor is formed on mark face uniformly to illuminate.

Embodiment 2

As shown in figure 3, the light that is sent of LED 8 by the reflecting surface 1101 of TIR lens 11 reflect after incide folding diffraction surfaces1202, wherein reflecting surface 1101 does not produce dispersion, rolls over the normal dispersion and anomalous dispersion of diffraction surfaces 1202, superposition is offset, in meshColor is formed on mark face uniformly to illuminate.

Embodiment 3

As shown in figure 4, the light that is sent of LED 8 by the reflecting surface 1201 of TIR lens 12 reflect after incide plane of refraction 1202,Wherein reflecting surface 1201 does not produce dispersion, and plane of refraction 1202 produces normal dispersion, and diffractometer 13 produces anomalous dispersion, and superposition is offsetAfterwards, color is formed in target face uniformly to illuminate.

Claims (6)

1. a kind of uniform full-spectrum LED illuminator of catadioptric diffraction specular, by LED lamp bead, refraction optical element, reflection opticsElement, diffraction optical element are constituted, what the full spectrum light source that described LED lamp bead sends multi-wavelength's light composition was sentLight, is incided in target face via refraction optical element, reflective optical devices and diffraction optical element, diffraction optics thereinElement produces anomalous dispersion, and refraction optical element produces normal dispersion, and reflective optical devices do not produce dispersion, described unusual colorDissipate and cancelled out each other with after normal dispersion superposition, color is formed in target face and is uniformly illuminated.

2. a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular as claimed in claim 1, it is characterised in that describedRefraction optical element, reflective optical devices and the integrated catadioptric diffraction element of diffraction optical element, the integration is catadioptricDiffraction element is furnished with an anti-diffraction surfaces and a plane of refraction, and the light that LED is sent is reflected by the anti-diffraction surfaces of TIR lensPlane of refraction is incided after diffraction, wherein anti-diffraction surfaces produce anomalous dispersion, plane of refraction produces normal dispersion, after the two superposition mutuallyOffset, color is formed in target face and is uniformly illuminated.

3. a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular as claimed in claim 1, it is characterised in that describedRefraction optical element, reflective optical devices and the integrated catadioptric diffraction element of diffraction optical element, the integration is catadioptricDiffraction element is equipped with a reflecting surface and a folding diffraction surfaces, and the light that LED is sent is after the reflective surface of TIR lensFolding diffraction surfaces are incided, wherein reflecting surface does not produce dispersion, rolls over the normal dispersion and anomalous dispersion of diffraction surfaces, and superposition is offset,Color is formed in target face uniformly to illuminate.

4. a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular as claimed in claim 1, it is characterised in that describedRefraction optical element and the integrated folding diffraction element of diffraction optical element, described integration folding diffraction element has a foldingFace and a diffraction surfaces are penetrated, the reflected element of light that LED is sent reflects rolls over diffraction element, wherein reflector into integrationPart does not produce dispersion, and the plane of refraction of integration folding diffraction element produces normal dispersion, the diffraction surfaces production of integration folding diffraction elementRaw anomalous dispersion, after superposition is offset, formation color is uniformly illuminated in target face.

5. a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular as claimed in claim 1, it is characterised in that describedReflective optical devices and the integrated anti-diffraction element of diffraction optical element, described integrated anti-diffraction element is furnished with oneReflecting surface and a diffraction surfaces, the light that LED is sent enter integrated anti-diffraction through integrated anti-diffraction element reflective surfaceThe diffraction surfaces of element, are again incident on refraction optical element, and wherein reflecting surface does not produce dispersion, and diffraction surfaces produce anomalous dispersion, foldingPenetrate element and produce normal dispersion, after superposition is offset, formation color is uniformly illuminated in target face.

6. a kind of catadioptric uniform full-spectrum LED illuminator of diffraction specular as claimed in claim 1, it is characterised in that describedReflective optical devices and the integrated catadioptric element of refraction optical element, described integrated catadioptric element is furnished with oneReflecting surface and a plane of refraction, the light that LED is sent enter integrated catadioptric through integrated catadioptric element reflective surfaceThe plane of refraction of element, is again incident on diffraction optical element, and wherein reflecting surface does not produce dispersion, and plane of refraction produces normal dispersion, spread outPenetrate optical element and produce anomalous dispersion, after superposition is offset, formation color is uniformly illuminated in target face.