CN102537852A - LED light source using optical glass filter - Google Patents
LED light source using optical glass filter Download PDFInfo
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- CN102537852A CN102537852A CN2009101072754A CN200910107275A CN102537852A CN 102537852 A CN102537852 A CN 102537852A CN 2009101072754 A CN2009101072754 A CN 2009101072754A CN 200910107275 A CN200910107275 A CN 200910107275A CN 102537852 A CN102537852 A CN 102537852A
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Abstract
The invention provides an LED light source using an optical glass filter with double functions of stopping ultraviolet rays and infrared rays. The LED light source comprises an LED device provided with at least one LED chip, and a filter, wherein the light filter is arranged on the LED device and is used for filtering light emitted by the LED chip; the light emitted by the LED chip irradiates to the outside through the light filter; and the filter can be added when the LED device is packaged or can be arranged when the LED device is secondarily packaged, or a plurality of LED devices share one light filter. The filter is a transparent substrate which has double functions of stopping the ultraviolet rays and the infrared rays and is formed by optical glass. The surface of the filter is plated with an ultraviolet ray stopping film layer and an infrared ray stopping film layer; and the LED light source can be used for absorbing light within a short wavelength of being smaller than 445nm and within a long wavelength of being greater than 700nm. The invention also provides the optical glass filter with the double functions of stopping the ultraviolet rays and the infrared rays as well as a preparation method of the optical glass filter.
Description
Technical field
The invention belongs to the LED lighting technical field.Be specifically related to the light filtering technique.
Technical background
Along with the appearance of ultra-bright LED, its efficient is increasingly high, and price descends gradually.Simultaneously LED have life-span length, vibration resistance, luminous efficiency high, noiseless, be not afraid of characteristics such as low temperature, no mercury pollution problem and cost performance height, big potentiality commodity of the alternative traditional lighting utensil of being had an optimistic view of by semicon industry.Ultra-high brightness LED has been expanded LED greatly and has been shown and the lighting source Application for Field at various signals, like car interior-exterior lamp, various traffic lights, indoor and outdoor information display screen and backlight.The LED product is used for illumination, will more wide application space be provided for LED.
Along with the range of application of led light source more and more widely, the light radiation of led light source harm problem must be paid attention to.
The harm that the light that light radiation harm mainly is meant different-waveband causes the excessive irradiation of human body; Mainly be to human eye and skin; Like near ultraviolet harm, the harm of retina blue light photochemistry, the harm of retina aphacia photochemistry, the harm of retina heat and the skin heat harm etc. of the harm of the photochemistry of skin and eyes, eyes, and what come to harm more easily among both is eyes.In recent years, along with the increase day by day of great power LED, the brightness of LED is increasingly high, and radiation hazard is also more and more stronger.
In the wavelength band of light radiation, the short wavelength of purple, near ultraviolet, ultraviolet and near-infrared, infrared L-band more are prone to cause biohazard.
Light radiation is following to the harm of eyes: 1) receive the ultra-violet radiation irradiation of certain hour when human body, can cause photic keratitis and photic conjunctivitis; 2) long-term UV-irradiation can cause cataract; 3) strong light radiation irradiation can cause retinal burn, and causing the most tangible wave band of effect of this harm is 435～440nm; 4) be accompanied by the harm of retina heat, radiation energy causes photochemistry harm to retina, even can cause the retinitis, and the light harm of wavelength 440nm is maximum; 5) receive the infra-red radiation influence for a long time and can cause cataract, the maximum wave band of harm is 780～1400nm.
And for skin, the injury that light radiation caused has: 1) durable tanned, causing rubefaction and the most significant sore wave band is the ultra-violet radiation below the 320nm; 2) skin aging, long-term radiation energy quickens skin aging, presents drying, coarse, hide-like and the innumerable outward appearance of wrinkle; 3) cutaneum carcinoma is accepted the most serious result that ultra-violet radiation causes for a long time and is caused cutaneum carcinoma.
At present international and domesticly formulating a plurality of corresponding standard aspect the test evaluation of light radiation safety.But LED is difference and the new type light source of coherent sources such as traditional incoherent light source and laser, and the research of the test and evaluation method that endangers for the light radiation of LED also is in the starting stage at present.
Because LED is in the continuous development of lighting field, CIE (International Commission on Illumination) has made regulation to the security of LED in the CIE of latest edition S 009/E:2002 standard.LED is caused the spoke limit value that exposes to the sun of harm such as near ultraviolet harm, the harm of retina blue light photochemistry, the harm of retina aphacia photochemistry, the harm of retina heat and skin heat harm of photochemistry harm, the eyes of skin and eyes made regulation.After CIE S 009/E:2002 standard was put into effect, IEC all quoted in 2002, and with published new standard IEC-62471 in view of the above in 2006, in issue IEC 60825-2007 in 2007, its importance had some idea of.
Domestic, the national standard " the photo bio security of lamp and lamp system " that is directed to common incoherent, broadband lamp and lamp system is in formal enforcement (GB/T 20145-2006) in 2006, and this standard instructs the photo bio security of various light fixtures.
Thus, light filtering technique technology in the LED lighting technical field and material become an important subject.
The patent documentation of relevant led light source is a lot; But the patent that does not have pair purple, near ultraviolet, ultraviolet and near-infrared, infrared band to filter is not also relevant for the patent by the transparent base coating process of optical glass moulding of ultraviolet-cutoff/infrared ray dual-use function.
Summary of the invention
The present invention provides a kind of use to have the led light source of ultraviolet-cutoff and the difunctional optical glass optical filter of infrared ray.
As shown in Figure 1; The present invention uses the led light source with ultraviolet-cutoff and the difunctional optical glass optical filter of infrared ray; Comprise LED device 1 with at least one led chip 11; And be installed in the optical filter 2 that is used to filter the light that led chip sends on the LED device, wherein the light that sends of led chip is transmitted into the outside through optical filter; Optical filter can just add when packaged LED device 1, also can when the LED device being carried out the secondary encapsulation, install, or a plurality of LED device uses an optical filter jointly.
The LED device can be monochrome or polychrome, and monochrome is the led chip of a certain emission wavelength of encapsulation in the LED device, makes its light that sends a kind of color, has a led chip in the LED device at least; Polychrome then is that led chip mutual encapsulation with multiple different emission is in a LED device, like the mutual encapsulation of red, blue, green three color chip mutual encapsulation or other color chip portfolio.
The optical glass optical filter is to have ultraviolet-cutoff and the bifunctional transparent base plated film by the optical glass moulding of infrared ray forms, can absorbing wavelength less than the short wavelength range of 445nm and wavelength greater than the light in long wavelength's scope of 700nm.
The present invention also provides a kind of have ultraviolet-cutoff and the bifunctional optical glass optical filter of infrared ray and preparation method thereof.
Have the transparent base plated film of the bifunctional optical glass optical filter of ultraviolet-cutoff and infrared ray, comprise the lens of the arbitrary surface of optical glass transparent base moulding, perhaps any diaphragm, perhaps any solid geometry shape by the optical glass moulding; It is characterized in that: transparent base (hereinafter to be referred as the optical glass transparent base) surface by the optical glass moulding is coated with ultraviolet cutoff rete and infrared ray cut rete, and the ultraviolet cutoff rete is positioned at the outermost layer that optical glass transparent base surface outermost layer or infrared ray cut rete are positioned at the optical glass transparent base.
Described ultraviolet cutoff rete is titanium oxide-cerium oxide rete, and the mass ratio of titanium oxide and cerium oxide is 10～90%: 10～90%.Described ultraviolet cutoff thicknesses of layers is: 10～500 nanometers; Its filter wavelength scope is set at below the 445nm.
Described infrared ray cut rete is piled up by two kinds of high and low refractive index material film spaces and forms; This high-index material film is formed by tantalum pentoxide; This low-index material film is formed by silica.Described infrared ray cut thicknesses of layers is: 10～500 nanometers; Its filter wavelength scope is set at greater than 700nm.
Optical glass is the main material of making optical lens, optical instrument.Optical glass must have highly accurate refractive index, Abbe number and the high grade of transparency, high evenness.Than the optical filter that is more suitable for led light source.
Equal one deck incessantly of ultraviolet cutoff rete and infrared ray cut rete wherein can be as required according to graded plating several layers ultraviolet cutoff rete and infrared ray cut rete.
Aforesaid preparation method with ultraviolet-cutoff and the bifunctional optical glass optical filter of infrared ray is characterized in that comprising the steps:
1) treats at first that coated optics glass transparent base material cleans, after the drying, carries out the forevacuum transition; In vacuum equipment, carry out the ion reverse sputtering at last and clean, let speeding-up ion bombard substrate surface, remove impurity, the optical glass transparent base that obtains cleaning;
2) adopt the magnetron sputtering method of being coated with to be coated with rete then:
(1). prepare ultraviolet-cutoff and end ultrared target:
Ultraviolet-cutoff target: by titanium oxide (TiO
2) and cerium oxide (CeO
2) form, titanium oxide and the shared mass percent of cerium oxide each component are: titanium oxide 10～90%, cerium oxide 10～90%; Mix and sinter into target.
End the infrared ray target: the low refractive index film target is highly purified silicon; High refractive index film is made up of tantalum pentoxide; Target is highly purified Ta
2O
5
(2). magnetron sputtering plating: the optical glass transparent base is carried out magnetron sputtering plating at pure argon or in oxygen argon mixture gas atmosphere; The sputtering pressure scope is 0.10Pa～3.0Pa, during sputter in the argon oxygen gas mixture the shared mass percent of oxygen be 0 to 90%; Adopt one of following three kinds of modes to carry out plated film:
(a) by titanium oxide-cerium oxide target the optical glass transparent base is carried out the magnetron sputtering inner layer film earlier, on this basis, carry out the magnetron sputtering outer membrane by silicon target material and tantalum pentoxide target again and obtain optical filter;
(b) by silicon target material and tantalum pentoxide target the optical glass transparent base is carried out the magnetron sputtering inner layer film earlier, on this basis, carries out the magnetron sputtering outer membrane by titanium oxide-cerium oxide target again and obtain optical filter,
(c) on the optical glass transparent base, plate several layers ultraviolet cutoff rete and infrared ray cut rete according to a graded, obtain optical filter.
Adopting online heating, heat treatment temperature during optical glass transparent base plated film described step 2) is 20～160 ℃.
Described step 2) the bifunctional transparent base plated film optical filter by the optical glass moulding of ultraviolet-cutoff and infrared ray that has that obtains in adopts off-line heat treatment, and heat treatment temperature is 20～160 ℃, and heat treatment time is 10～240 minutes.
The present invention uses the led light source with ultraviolet-cutoff and the difunctional optical glass optical filter of infrared ray; Can make the lighting of Any shape; And meet IEC 60825-2007 and IEC62471-2006, and light radiation safety national standard: GB/T 20145-2006 " the photo bio security of lamp and lamp system ".The present invention is coated with ultraviolet cutoff rete and infrared ray cut rete with magnetron sputtering method on the optical glass transparent base; The ultraviolet cutoff rete is except that cerium ion absorbs ultraviolet ray; The Ti ion is that strong absorption is also arranged about 380nm at wavelength, and Ti and Ce ion are compound, fully ultraviolet-cutoff; The ultraviolet cutoff rate is high, does not influence visible light transmissivity; Its preparation method is simple.Formed optical filter is applicable on led light source or the other light sources, makes light source product meet IEC 60825-2007 and IEC 62471-2006, and light radiation safety national standard: GB/T 20145-2006 " the photo bio security of lamp and lamp system ".Because led light source of the present invention has filtered the higher interior light radiation of wave band of biohazard property, therefore, when this led light source uses, just do not need additional in addition filter not reduce light radiation harm.
Description of drawings
Fig. 1 is the structural profile sketch map that the present invention uses the led light source with ultraviolet-cutoff and the difunctional optical glass optical filter of infrared ray;
Fig. 2 is the generalized section of the led light source of another embodiment of the present invention;
Fig. 3 is further embodiment of this invention: the common sketch map that uses the led light source of an optical filter formation of a plurality of LED devices;
Fig. 4 is further embodiment of this invention: a kind of sketch map of light fixture;
Fig. 5 sees through the present invention: the curve map with lambda1-wavelength-incident light percent transmission of the bifunctional optical glass optical filter of ultraviolet-cutoff and infrared ray;
Fig. 6 has been suitable for the sketch map of led light source of the present invention as the LCD TV backlight source.
The specific embodiment
Embodiment one
See also Fig. 1, a LED device 1 has wherein encapsulated 11, one optical glass optical filters 2 of a led chip and has been positioned at led chip 11 tops, and fixing.
During work, the light that led chip 11 sends must be through just being transmitted into the outside behind the optical filter 2, and the wavelength that is sent by 2 pairs of led chips of optical filter filters less than 445nm with greater than the light in the 700nm scope.
Led chip 11 can be selected any needed emission wavelength, be the green glow of 530nm like dominant wavelength for example, or dominant wavelength is the ruddiness of 620nm; Dominant wavelength is the blue light of 460nm for another example, and in the glue of embedding, mixes a certain proportion of YAG powder, and the blue-light excited YAG powder through led chip sends obtains the white light that colour temperature is 8000K or other required colour temperatures at last.
Have the preparation of ultraviolet-cutoff and the bifunctional optical filter of infrared ray, comprise the steps:
1) treats at first that coated optics glass transparent base material cleans, after the drying, carries out the forevacuum transition; In vacuum equipment, carry out the ion reverse sputtering at last and clean, let speeding-up ion bombard substrate surface, remove impurity, the optical glass transparent base that obtains cleaning;
2) adopt the magnetron sputtering method of being coated with to be coated with rete then:
(1). prepare ultraviolet-cutoff and end ultrared target:
The target of ultraviolet-cutoff: be that 9: 1 ratio takes by weighing chemical pure TiO (a) in mass ratio
2(purity is 99.9%) and analytically pure CeO
2(purity is 99.9%) powder is 100g altogether; Then powder mixture being put into planetary ball mill, is medium with ethanol, and 210r/min wet-milling 24h mixes; (b) grind and sieve; (c) take by weighing the 70g powder and put into homemade graphite jig (Φ 60mm), utilize the multifunctional vacuum hot-pressed sintering furnace, heat up automatically, when temperature reaches 200 ℃, feed the protective gas high-purity N with 5 ℃/min
2(purity 99.995%), when temperature is 1050 ℃, pressurization, hot pressing pressure is 15Mpa, and insulation 2h, cools to room temperature afterwards with the furnace, can obtain the high-compactness CeO of Φ 60mm * 6mm
2/ TiO
2Composite target material.
By ultrared target: the target of low refractive index film is the silicon target of 4 inches of the diameters of purity 99.99%; The high refractive index film target is 4 inches Ta of diameter of purity 99.99%
2O
5Target.
(2). magnetron sputtering plating:
Adopt the vertical three target magnetic control sputtering coating systems of ultrahigh vacuum type, be equipped with rotation system, can make the film thickness of deposition even, reliability is higher.Magnetic control sputtering device sputtering sedimentation CeO
2/ TiO
2Laminated film, technological parameter is: sputter gas: 95% argon and 5% oxygen gas mixture (purity>=99.9%); Sputter gas flow: 60cm
3/ s; Sputtering pressure: 1.0Pa; Back of the body end vacuum: 6.0 * 10
-5Pa; Sputtering power: 60W, 90W, 120W and 150W; Sputtering time: 3h; The spacing of target and optical glass transparent base is 65mm.The ultraviolet cutoff thicknesses of layers is 210 nanometers.
Adopt vertical three target magnetic control sputtering coating systems, adopt Ta
2O
5Target, it is sputter gas that room temperature condition feeds argon gas down, and oxygen is reacting gas, and the gas flow ratio of argon gas and oxygen is 16: 4, and power 100W, sputtering pressure are 0.2～1.0Pa.Adopt the reaction radio frequency sputtering method to prepare SiO
2Film, target are the silicon target of purity 99.99%, and substrate is the optical glass transparent base.Specimen holder becomes 45 with the sputter target surface, and spacing is adjustable continuously; In order to guarantee the uniformity of rete, specimen holder infinitely variable speeds rotation; Working gas is that purity is 99.99% argon gas and oxygen.Sputtering pressure is 0.7Pa, and sputter temperature is not higher than 250 ℃, and sputtering power is about 110w.The infrared ray cut thicknesses of layers is 180 nanometers.
Sputter finishes the back heat-treats coating, adopts common chamber type electric resistance furnace, is warming up to 160 ℃ with 5～8 ℃/min; Cool to room temperature with the furnace behind the insulation 4h.
In the present embodiment, the optical glass transparent base is circular tabular thin slice.
Embodiment two
Basic identical with embodiment one; Different is the preparation of optical filter; Earlier the optical glass transparent base is carried out the magnetron sputtering inner layer film, on this basis, carry out the magnetron sputtering outer membrane by titanium oxide-cerium oxide target again and obtain product by silicon target material and tantalum pentoxide target.
Embodiment three
Basic identical with embodiment one, different is that optical filter is shaped to the round lens curved surface by the optical glass transparent base, as shown in Figure 2; Clean again and plated film again or be shaped to square lens curved surface.
Embodiment four
Basic identical with embodiment one, different is on the optical glass transparent base, to plate the ultraviolet cutoff rete earlier, plates the infrared ray cut rete again, and then plating ultraviolet cutoff rete, forms the optical filter of triple-layer coating like this; Or as required,, form optical filter according to graded plating several layers ultraviolet cutoff rete and infrared ray cut rete.
Embodiment five
Basic identical with embodiment one, different is in the LED device, has encapsulated the led chip of a plurality of co-wavelengths or different wave length, for example like two blue chip mutual encapsulation, and and for example red, blue, green three-color LED chip mutual encapsulation.During work, the light that the led chip of co-wavelength or different wave length sends must be filtered less than 445nm with greater than the light in the 700nm scope the wavelength that led chip sends by optical filter through just being transmitted into the outside behind the optical filter.
Embodiment six
As shown in Figure 3, a plurality of LED devices 1 are combined, and are installed on the PCB 3.At the light direction of all LED devices, installed one and had ultraviolet-cutoff and the bifunctional optical filter 2 of infrared ray.
Use an optical filter by a plurality of LED devices are common, comprise that also other must element such as PCB, shell, electronic component etc., constitute a led light source; The structure of whole LED light source is decided as required.During this led light source work, the light that the led chip in all LED devices sends must be filtered less than 445nm with greater than the light in the 700nm scope the wavelength that led chip sends by optical filter through just being transmitted into the outside behind the optical filter.
Wherein LED device 1 can be monochrome or polychrome, and during for monochrome, the led chip of at least one a certain emission wavelength of encapsulation in the LED device be the green glow of 530nm like dominant wavelength for example, or dominant wavelength is the ruddiness of 620nm; Dominant wavelength is the blue light of 460nm for another example, and in the glue of embedding, mixes a certain proportion of YAG powder, and the blue-light excited YAG powder through led chip sends obtains the white light that colour temperature is 8000K or other required colour temperatures at last.During for polychrome, with the led chip mutual encapsulation of multiple different emission in a LED device, for example as the mutual encapsulation of red, blue, green three color chip mutual encapsulation or other color chip portfolio.
Embodiment seven
As shown in Figure 4, be a kind of example of light fixture, be by optical filter of the common use of a plurality of LED devices equally.A plurality of LED device 1 is combined according to certain rule, and a spherical cover 2 of solid has been installed in the outside, and this cover is to have ultraviolet-cutoff and the bifunctional optical filter of infrared ray.During this led light source work, the light that the led chip in all LED devices sends must be filtered less than 445nm with greater than the light in the 700nm scope the wavelength that led chip sends by optical filter through just being transmitted into the outside behind the optical filter.
Embodiment eight
Fig. 6 has been suitable for the sketch map of the led light source of the embodiment of the invention one～embodiment five as the LCD TV backlight origin system.
The led light source 4 of a plurality of use optical filters is installed on the PCB5, and led light source is evenly distributed.
Led light source adopts paster that the form of (SMT) is installed, and PCB is last to have made corresponding circuit, makes the led light source can operate as normal.
At the light direction of led light source, be arranged in order diffuser plate 6 and a series of bloomings 7.
During work, the light that led light source sent all gets into diffuser plate, and through fully reflection mixing, through blooming, its effect is that the direction of light is put in order again.Last irradiate light forms back lighting to the back surface of liquid crystal panel.
As backlight, present embodiment can be used for various liquid crystal displays, and the display device of radiogical safety or compatibility of night vision requirement is especially arranged.For example: LCD TV, watch-dog, display are applicable to industry, field such as civilian, military.
More than be that preferred implementation of the present invention is described, those skilled in the art is in the scheme scope of the present invention's technology, and common variation and the replacement carried out all should be included in protection scope of the present invention.
Claims (13)
1. a use has the led light source of ultraviolet-cutoff and the difunctional optical glass optical filter of infrared ray; It is characterized in that comprising LED device with at least one led chip; And be installed in the optical filter that is used to filter the light that led chip sends on the LED device, wherein the light that sends of led chip is transmitted into the outside through optical filter.
2. led light source according to claim 1 is characterized in that said optical filter just adds when the packaged LED device, perhaps when the LED device being carried out the secondary encapsulation, install, or a plurality of LED device uses an optical filter jointly.
3. led light source according to claim 1 is characterized in that the LED device is monochrome or polychrome, and monochrome is the led chip of a certain emission wavelength of encapsulation in the LED device, has a led chip in the LED device at least; Polychrome is that led chip mutual encapsulation with multiple different emission is in a LED device.
4. led light source according to claim 1; It is characterized in that said optical glass optical filter is to have ultraviolet-cutoff and the bifunctional transparent base plated film by the optical glass moulding of infrared ray forms, can absorbing wavelength less than the short wavelength range of 445nm and wavelength greater than the light in long wavelength's scope of 700nm.
5. according to claim 4 have ultraviolet-cutoff and a bifunctional optical glass optical filter of infrared ray; Transparent base plated film by the optical glass moulding; The lens that comprise the arbitrary surface of optical glass moulding, perhaps any diaphragm, perhaps any solid geometry shape; It is characterized in that: the transparent base surface by the optical glass moulding is coated with ultraviolet cutoff rete and infrared ray cut rete, and the ultraviolet cutoff rete is positioned at the outermost layer that optical glass transparent base surface outermost layer or infrared ray cut rete are positioned at the optical glass transparent base.
6. optical filter according to claim 5 is characterized in that described ultraviolet cutoff rete is titanium oxide-cerium oxide rete, and the mass ratio of titanium oxide and cerium oxide is 10～90%: 10～90%.
7. optical filter according to claim 5 is characterized in that described ultraviolet cutoff thicknesses of layers is 10～500 nanometers; Its filter wavelength scope is set at below the 445nm.
8. optical filter according to claim 5 is characterized in that described infrared ray cut rete is piled up by two kinds of high and low refractive index material film spaces to form; This high-index material film is formed by tantalum pentoxide; This low-index material film is formed by silica.
9. optical filter according to claim 5 is characterized in that described infrared ray cut thicknesses of layers is 10～500 nanometers; Its filter wavelength scope is set at greater than 700nm.
10. optical filter according to claim 5 is characterized in that: as required according to graded plating several layers ultraviolet cutoff rete and infrared ray cut rete.
11. the preparation method with ultraviolet-cutoff and the bifunctional optical glass optical filter of infrared ray is characterized in that comprising the steps:
1) treats at first that coated optics glass transparent base material cleans, after the drying, carries out the forevacuum transition; In vacuum equipment, carry out the ion reverse sputtering at last and clean, let speeding-up ion bombard substrate surface, remove impurity, the optical glass transparent base that obtains cleaning;
2) adopt the magnetron sputtering method of being coated with to be coated with rete then:
(1). prepare ultraviolet-cutoff and end ultrared target:
Ultraviolet-cutoff target: by titanium oxide (TiO
2) and cerium oxide (CeO
2) form, titanium oxide and the shared mass percent of cerium oxide each component are: titanium oxide 10～90%, cerium oxide 10～90%; Mix and sinter into target.
End the infrared ray target: the low refractive index film target is highly purified silicon; High refractive index film is made up of tantalum pentoxide; Target is highly purified Ta
2O
5
(2). magnetron sputtering plating: the optical glass transparent base is carried out magnetron sputtering plating at pure argon or in oxygen argon mixture gas atmosphere; The sputtering pressure scope is 0.10Pa～3.0Pa, during sputter in the argon oxygen gas mixture the shared mass percent of oxygen be 0 to 90%; Adopt one of following three kinds of modes to carry out plated film:
(a) by titanium oxide-cerium oxide target the optical glass transparent base is carried out the magnetron sputtering inner layer film earlier, on this basis, carry out the magnetron sputtering outer membrane by silicon target material and tantalum pentoxide target again and obtain optical filter;
(b) by silicon target material and tantalum pentoxide target the optical glass transparent base is carried out the magnetron sputtering inner layer film earlier, on this basis, carry out the magnetron sputtering outer membrane by titanium oxide-cerium oxide target again and obtain optical filter;
(c) on the optical glass transparent base, plate several layers ultraviolet cutoff rete and infrared ray cut rete according to a graded, obtain optical filter.
12. the preparation method of optical filter according to claim 11 is characterized in that described step 2) in optical glass transparent base plated film the time to adopt online heating, heat treatment temperature be 20～160 ℃.
13. led light source according to claim 1; It is characterized in that to make the lighting of Any shape; And meet IEC 60825-2007 and IEC 62471-2006, and light radiation safety national standard: GB/T 20145-2006 " the photo bio security of lamp and lamp system ".
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| CN1603264A (en) * | 2004-10-29 | 2005-04-06 | 武汉理工大学 | Coated glass with dual function of cutting-off ultraviolet ray / reflecting infrared ray and preparation method thereof |
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| CN1917239A (en) * | 2006-09-05 | 2007-02-21 | 深圳市中电淼浩固体光源有限公司 | LED light source compatible to night vision |
| US20070206382A1 (en) * | 2004-06-01 | 2007-09-06 | Wu Jeng-Yih | Light source module of projectors |
| CN101051093A (en) * | 2006-04-04 | 2007-10-10 | 精工爱普生株式会社 | Optical multilayer filter, method for manufacturing the same, and electronic apparatus |
| CN101086546A (en) * | 2006-06-09 | 2007-12-12 | 鸿富锦精密工业（深圳）有限公司 | Lens module and camera module |
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2009
- 2009-05-13 CN CN2009101072754A patent/CN102537852A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04177204A (en) * | 1990-11-13 | 1992-06-24 | Nissan Motor Co Ltd | Ultraviolet and infrared ray cut filter |
| CN1705766A (en) * | 2002-10-22 | 2005-12-07 | 旭硝子株式会社 | Substrate with multilayer film and method for producing same |
| US20070206382A1 (en) * | 2004-06-01 | 2007-09-06 | Wu Jeng-Yih | Light source module of projectors |
| CN1603264A (en) * | 2004-10-29 | 2005-04-06 | 武汉理工大学 | Coated glass with dual function of cutting-off ultraviolet ray / reflecting infrared ray and preparation method thereof |
| CN1896770A (en) * | 2005-07-15 | 2007-01-17 | 鸿富锦精密工业（深圳）有限公司 | Light filter |
| CN101051093A (en) * | 2006-04-04 | 2007-10-10 | 精工爱普生株式会社 | Optical multilayer filter, method for manufacturing the same, and electronic apparatus |
| CN101086546A (en) * | 2006-06-09 | 2007-12-12 | 鸿富锦精密工业（深圳）有限公司 | Lens module and camera module |
| CN1917239A (en) * | 2006-09-05 | 2007-02-21 | 深圳市中电淼浩固体光源有限公司 | LED light source compatible to night vision |
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Application publication date: 20120704 |