CN102603188A

CN102603188A - Near infrared light absorption glass, element and filter

Info

Publication number: CN102603188A
Application number: CN201210036864XA
Authority: CN
Inventors: 孙伟; 赖德光
Original assignee: Chengdu Guangming Optoelectronics Co Ltd
Current assignee: CDGM Glass Co Ltd; Chengdu Guangming Optoelectronics Co Ltd
Priority date: 2012-02-17
Filing date: 2012-02-17
Publication date: 2012-07-25

Abstract

The invention provides near infrared light absorption glass, a near infrared light absorption element and a near infrared light absorption filter, which are pollution-free to the environment, and better in uniformity and excellent in transmission characteristic in a visible range. For the near infrared light absorption glass, when the thickness of the near infrared light absorption glass is 1 mm, the transmissivity is shown to be greater than 80% at a wavelength of 400 nm, and the transmissivity is shown to be greater than 85% at a wavelength of 500 nm. The near infrared light absorption glass contains cations such as P<5+>, Al<3+>, Li<+>, R<2+> and Cu<2+>, wherein R<2+> represents Mg<2+>, Ca<2+>, Sr<2+> and Ba<2+>, in addition, the near infrared light absorption glass contains anions such as O<2->,F<->, Cl<->, Br<-> or I<->, and the total amount of Cl<->, Br<-> and I<-> is 0.001-1 percent. The quality of glass bubbles is measured according to a testing method specified by GB/T7962.8-87, and reaches above A grade.

Description

Near infrared light heat absorbing glass, element and spectral filter

Technical field

The present invention relates to a kind of near infrared light heat absorbing glass, near infrared light absorber element and near infrared light absorption filter.Particularly, the present invention relates to the near infrared light heat absorbing glass that a kind of near infrared light absorption filter of suitable chromatic sensitivity correction is used, and the near infrared light absorber element and the spectral filter that constitute by this glass.

Background technology

In recent years; The spectrum sensitivity that is used for the semiconductor camera element such as CCD, CMOS of digital camera and VTR photographic camera; Spread near the near infrared field that begins from visual field the 1100nm, use the spectral filter that absorbs near infrared field light can obtain being similar to people's visual sense degree.Therefore; The chromatic sensitivity correction is increasing with the demand of spectral filter; This just has higher requirement to the near infrared light absorptive function glass that is used to make this type of spectral filter, i.e. requirement can be in a large number, this type of glass of qurer supply, and glass has stability preferably.

In the prior art, the near infrared light heat absorbing glass is through in phosphate glass or fluorphosphate glass, adding Cu ²⁺Make the near infrared light heat absorbing glass.But relative fluorphosphate glass, the phosphate glass chemicalstability is relatively poor, if glass is exposed under the hot and humid environment for a long time, glass surface can produce the defective of be full of cracks and gonorrhoea.

In addition, prior art is through introducing Ce ²⁺, Sb ³⁺Eliminate Cu in the glass solution ²⁺Be reduced to Cu ⁺, solve the technical problem that near the transmitance of glass wavelength 400nm reduces, but CeO ₂And Sb ₂O ₃Introducing environment is affected and CeO ₂Cost is higher.

Summary of the invention

It is better and at excellent near infrared light heat absorbing glass, element and the spectral filter that sees through characteristic of visible range that technical problem to be solved by this invention provides a kind of environmentally safe, homogeneity.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: the near infrared light heat absorbing glass; When said near infrared light heat absorbing glass thickness is 1mm; Show greater than 80% in wavelength 400nm transsmissivity; Show that in wavelength 500nm transsmissivity said near infrared light heat absorbing glass contains the P that useful cation form shows greater than 85% ⁵⁺, Al ³⁺, Li ⁺, R ²⁺And Cu ²⁺, said R ²⁺Represent Mg ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺, contain the O that useful anion form shows simultaneously ^2-And F ^-, also contain Cl ^-, Br ^-Or I ^-, and Cl ^-, Br ^-And I ^-The total amount be 0.001-1%, the glass blister quality is measured by GB/T 7962.8-87 specified test, reaches more than the A level.

Further, when said near infrared light heat absorbing glass thickness is 1mm, greater than 88%, show greater than 90% in wavelength 500nm transsmissivity in the demonstration of wavelength 400nm transsmissivity.

Further, the P that contains 15-35% ⁵⁺The Al of 5-20% ³⁺The Li of 1-30% ⁺The Na of 0-10% ⁺The K of 0-3% ⁺The Cu of 0.1-8% ²⁺R ²⁺Content is 30-65%; Cl ^-, Br ^-And I ^-The total amount be 0.001-1%.

Further, the P that contains 20-30% ⁵⁺The Al of 10-15% ³⁺The Li of 1-20% ⁺The Na of 0-5% ⁺The K of 0-3% ⁺The Cu of 1.2-5% ²⁺R ²⁺Content is 40-65%; Cl ^-, Br ^-And I ^-The total amount be 0.0050.5%.

Further, the P that contains 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-10% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺R ²⁺Content is greater than 50% but is less than or equal to 65%; Cl ^-, Br ^-And I ^-The total amount be 0.009-0.1%.

Further, the P that contains 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-5% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺R ²⁺Content is 54-65%; Cl ^-, Br ^-And I ^-The total amount be 0.01-0.07%.

Further, the P that contains 15-35% ⁵⁺The Al of 5-20% ³⁺The Li of 1-30% ⁺The Na of 0-10% ⁺The K of 0-3% ⁺The Cu of 0.1-8% ²⁺The Mg of 0.1-10% ²⁺The Ca of 1-20% ²⁺The Sr of 15-35% ²⁺The Ba of 10-30% ²⁺Cl ^-Content is 0.005-1%.

Further, the P that contains 20-30% ⁵⁺The Al of 10-15% ³⁺The Li of 1-20% ⁺The Na of 0-5% ⁺The K of 0-3% ⁺The Cu of 1.2-5% ²⁺The Mg of 2-8% ²⁺The Ca of 5-15% ²⁺The Sr of 21-30% ²⁺The Ba of 15-30% ²⁺Cl ^-Content is 0.008-0.5%.

Further, the P that contains 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-10% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺The Mg of 3-7% ²⁺The Ca of 7-11% ²⁺The Sr of 23-28% ²⁺The Ba of 21-30% ²⁺Cl ^-Content is 0.008-0.1%.

Further, the P that contains 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-5% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺The Mg of 3-7% ²⁺The Ca of 7-11% ²⁺The Sr of 23-28% ²⁺The Ba of 21-25% ²⁺Cl ^-Content is 0.009-0.07%.

Further, F ^-Content is 45-60%; O ^2-Content is 40-55%.

Further, F ^-Content is 48-57%; O ^2-Content is 43-52%.

Further, F ^-Content is greater than 50% but is less than or equal to 57%; O ^2-Content is more than or equal to 43% but less than 50%.

Further, F ^-Content is 51-55%; O ^2-Content is 45-49%.

Further, F ^-Content is 51-53%; O ^2-Content is 47-49%.

The near infrared light absorber element is made up of above-mentioned near infrared light heat absorbing glass.

The near infrared light absorption filter is made up of above-mentioned near infrared light heat absorbing glass.

The invention has the beneficial effects as follows: the present invention as host glass, does not introduce Sb with the fluophosphate glass of superior weathering resistance ³⁺, Ce ²⁺, through in glass is formed, introducing Cl ^-, Br ^-Or I ^-, eliminate the bubble that the glass melting process produces, the glass blister quality is measured by GB/T 7962.8-87 specified test, can reach more than the A level, and therefore the homogeneity of glass of the present invention is fine; And through an amount of R that increases ²⁺(Mg ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺) content suppress Cu ²⁺Be reduced to Cu ⁺, reach the purpose of the glass of near infrared spectrum excellent performance; When thickness of glass of the present invention was 1mm, wavelength 400nm transsmissivity showed greater than 80%, showed greater than 85% in wavelength 500nm transsmissivity, and in the spectral transmittance in 500 to 700nm wavelength region, transmitance is that 50% o'clock corresponding wavelength (is λ ₅₀Corresponding wavelength value) scope is the scope of 615 ± 10nm.Glass chemistry excellent in stability of the present invention mainly shows as the stable D of water-fast effect simultaneously _WReach 1 grade, the stable D of acidproof effect _AReach or be superior to 4 grades.

Description of drawings

Fig. 1 is the spectral-transmission favtor graphic representation of the near infrared light heat absorbing glass of embodiments of the invention 1.

Embodiment

Near infrared light heat absorbing glass of the present invention be fluophosphate glass as the basis, be added with the Cu of near infrared light sorption ²⁺Obtain.

Hereinafter, cationic components content representes that with the degree that this positively charged ion weight accounts for whole positively charged ion gross weights anionic group content is represented with the degree that this negatively charged ion weight accounts for whole negatively charged ion gross weights.

P ⁵⁺Being the basal component of fluorphosphate glass, is at Cu ²⁺Region of ultra-red in a kind of important component of produce absorbing.When its content less than 15% the time, the colour correction function worsens that also band is green; Surpass 35% weather resisteant, the deterioration of anti-increased devitrification resistance, so P ⁵⁺Content be defined as 15-35%, be preferably 20-30%, more preferably 21-25%.

Al ³⁺Be the devitrification resistivity that improves fluorphosphate glass, weathering resistance, resistance to sudden heating, physical strength and a kind of component of chemical-resistant.Work as Al ³⁺Content is lower than at 5% o'clock, does not reach above-mentioned effect; Work as Al ³⁺Content surpasses at 20% o'clock, and the near-infrared absorbing characteristic reduces.Therefore, Al ³⁺Content is 5-20%, more preferably 10-15%.

Li ⁺, Na ⁺And K ⁺Be the meltability that improves glass, the component that becomes the transmitance of glass property and visible region.With respect to Na ⁺, K ⁺, a spot of Li ⁺Introducing to the chemicalstability better effects if of glass.But work as Li ⁺Content surpasses at 30% o'clock, and the weather resistance of glass and processing characteristics worsen.Therefore, Li ⁺Content is 1-30%, is preferably 1-20%, and more preferably 2-10% further is preferably 2-5%.

The present invention can also preferably add minor N a ⁺With Li ⁺Consolute can effectively improve the weather resisteant of glass.Na ⁺Content is 0-10%, is preferably 0-5%, more preferably 0.5-3%.K ⁺Content is 0-3%, if its content surpasses at 3% o'clock, durability of glass reduces on the contrary.

R ²⁺Be the component that effectively improves the one-tenth glass property of glass, anti-increased devitrification resistance and workability, R here ²⁺Represent Mg ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺As the near infrared light absorption filter, the light transmission rate that is contemplated to be visible range is higher.In order to improve the transmitance of visible range, the cupric ion of introducing is not Cu ⁺, must be Cu ²⁺If glass solution is in reduced state, Cu ²⁺Just become Cu ⁺, consequently near the transmitance the wavelength 400nm will reduce.The present invention is through an amount of Mg that strengthens ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺The total amount, increased the alkali content of glass metal, can suppress Cu ²⁺Be reduced into Cu ⁺, make that the near infrared light absorptive character of glass are excellent.Mg ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺If the total amount less than 30%, anti-increased devitrification resistance just has the tendency of deterioration, if surpass 65%, the tendency that worsens anti-increased devitrification resistance is arranged also.Therefore, Mg ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺The total amount is 30-65%, and preferably adding up to amount is 40-65%, and more preferably to add up to amount be greater than 50% but be less than or equal to 65%, and most preferably adding up to amount is 54-65%.

Wherein, Mg ²⁺And Ca ²⁺The effect that improves the anti-increased devitrification resistance of glass, chemicalstability, processibility is arranged.Mg ²⁺Amount is that 0.1-10% is more satisfactory, more preferably 2-8%, further preferred 3-7%.Ca ²⁺Content is preferably 1-20%, and more preferably 5-15% further is preferably 7-11%.

Relative Mg ²⁺And Ca ²⁺, the present invention has introduced high-load Sr ²⁺And Ba ²⁺, effectively increasing R ²⁺Content brings when improving the light transmission rate effect Sr ²⁺And Ba ²⁺Also has the effect that improves into glass property, the anti-increased devitrification resistance of glass, meltbility.Sr ²⁺Content is preferably 15-35%, 21-30% more preferably, further preferred 23-28%.Same reason, Ba ²⁺Content is preferably 10-30%, and more preferably 15-30% further is preferably 21-30%, most preferably is 21-25%.

Copper in the glass is the leading indicator of near-infrared absorbing characteristic, and with Cu ²⁺Exist.Work as Cu ²⁺Content is lower than at 0.1% o'clock, and near-infrared absorbing is few; But when its content surpassed 8%, the anti-devitrification behavior of glass of the present invention reduced.Therefore, Cu ²⁺Content is 0.1-8%, is preferably 1.2-5%.

Contain O in the glass of the present invention as anionic component ^2-And F ^-F ^-It is the important anionic group that reduces the glass melting temperature and improve chemicalstability.Among the present invention, work as F ^-Content was equal to or less than 50% o'clock, and chemicalstability reduces; Work as F ^-Content surpasses at 60% o'clock, because O ^2-Content reduces, Cu ²⁺Minimizing can not get suppressing Cu in the glass ⁺Content raises, and shortwave partially absorbs increase, and ir absorption reduces.Therefore, F ^-Content is 45-60%, is preferably 48-57%, more preferably greater than 50% but be less than or equal to 57%, further is preferably 51-55%, most preferably is 51-53%.

O ^2-Be a kind of important anionic group in the glass of the present invention, work as O ^2-Content very little the time, because Cu ²⁺Be reduced to Cu ⁺So in the short wavelength zone, particularly near the absorption 400nm becomes more greatly up to shown in green; But work as O ^2-Content when too much, thereby cause higher melt temperature because the viscosity of glass becomes higher, so transmitance reduces.Therefore, O among the present invention ^2-Content be 40-55%, be preferably 43-52%, more preferably, further be preferably 45-49%, more preferably 47-49% more than or equal to 43% but less than 50%.

In near-infrared absorbing glass, when improving melt temperature, Cu ²⁺Be reduced to Cu easily ⁺, the color of glass becomes green from blueness, thereby has damaged colour sensitivity correct application necessary characteristic to the semi-conductor image-forming component.The preferred an amount of F that increases of the present invention ^-Content, and F ^-Content is greater than O ²Content can reduce the glass melting temperature effectively, and increases F in right amount ^-Can also make the chemicalstability of glass excellent.Therefore, F ^--O ^2-Preferable range be 0.1-20%, further preferred 0.1-10%, most preferred range is 0.1-3%.

In addition, in order to remove the bubble that produces in the glass melting process, except O as anionic component ^2-And F ^-, Cl ^-, Br ^-And I ^-In to select more than one halogenic ingredient to introduce be comparatively ideal.If Cl ^-, Br ^-And I ^-The total amount less than 0.001%, be difficult to fully to obtain removing the bubble that produces in the glass melting process, if add up to amount to surpass 1%, Cu ²⁺Be reduced into Cu ⁺, near the transmitance the wavelength 400nm worsens.Therefore, Cl of the present invention ^-, Br ^-And I ^-The total amount be 0.001-1%, preferred content is 0.005-0.5%, more preferably content is 0.009-0.1%, most preferred content is 0.01-0.07%.

At Cl ^-, Br ^-And I ^-In, that best embody superior effect is Cl ^-, therefore, at Cl ^-, Br ^-And I ^-In, comparatively ideal is only to add Cl ^-Cl ^-Amount is 0.005-1%, is preferably 0.008-0.5%, and more preferably 0.008-0.1% most preferably is 0.009-0.07%.

Near infrared light heat absorbing glass of the present invention is a fluophosphate glass, and major part is O in the anionic component ^2-And F ^-That is, as O ^2-And F ^-The total amount, can more than 95% as target.Make glass of the present invention reach superior weathering resistance, maintain near the wavelength 400nm high permeability, realize superior anti-increased devitrification resistance, O ^2-And F ^-The total amount be more than 96%, better total amount is more than 97%, further to it is desirable to more than 99%.

The present invention is through specific design of components, and the preferred light transmission rate of glass is following:

When thickness of glass is 1mm, characteristics showed below the spectral transmittance in 400 to 1200nm wavelength region has.

The spectral transmittance of the wavelength of 400nm more than or equal to 80%, be preferably greater than or equal 85%, more preferably greater than or equal 88%.

The spectral transmittance of the wavelength of 500nm more than or equal to 85%, be preferably greater than or equal 88%, more preferably greater than or equal 90%.

The spectral transmittance of the wavelength of 600nm more than or equal to 58%, be preferably greater than or equal 61%, more preferably greater than or equal 64%.

Be less than or equal to 12% at the spectral transmittance of the wavelength of 700nm, preferably be less than or equal to 10%, be more preferably less than or equal 9%.

Be less than or equal to 5% at the spectral transmittance of the wavelength of 800nm, preferably be less than or equal to 3%, be more preferably less than or equal 2.5%, also be more preferably less than or equal 2%.

Be less than or equal to 5% at the spectral transmittance of the wavelength of 900nm, preferably be less than or equal to 3%, be more preferably less than or equal 2.5%.

Be less than or equal to 7% at the spectral transmittance of the wavelength of 1000nm, preferably be less than or equal to 6%, be more preferably less than or equal 5%.

Be less than or equal to 15% at the spectral transmittance of the wavelength of 1100nm, preferably be less than or equal to 13%, be more preferably less than or equal 11%.

Be less than or equal to 24% at the spectral transmittance of the wavelength of 1200nm, preferably be less than or equal to 22%, be more preferably less than or equal 21%.

That is, the absorption in the near infrared region wavelength region of 700nm to 1200nm is big, and the absorption in the wavelength region of the visible region of 400nm to 600nm is little.

In the spectral transmittance in 500 to 700nm wavelength region, transmitance is that 50% o'clock corresponding wavelength (is λ ₅₀Corresponding wavelength value) scope is 615 ± 10nm.

The transmitance of glass of the present invention is meant the value that obtains in this way through spectrophotometer: the supposition glass sample has two planes of parallel and optical polish; Light vertical incidence from the parallel planes; From the outgoing of another one parallel planes; This outgoing light intensity is exactly a transmitance divided by the incident light intensity, and this transmitance is also referred to as outer transmitance.

According to the above-mentioned characteristic of glass of the present invention, can realize the color correction of semi-conductor image-forming component such as CCD or CMOS admirably.

The characteristic of the chemicalstability aspect of glass is following: the stable D of water-fast effect _WCan reach 1 grade; The stable D of acidproof effect _AReach 4 grades, preferably reach 3 grades, more preferably reach 2 grades.

The stable D of above-mentioned water-fast effect _W(powder method) pressed the testing method of GB/T17129, according to computes:

D _W＝(B-C)/(B-A)*100

In the formula: D _W-glass leaches percentage ratio (%)

The quality of B-strainer and sample (g)

C-strainer and the quality (g) that corrodes the back sample

A-filter quality (g)

By the leaching percentage ratio that calculates, D is stablized in the water-fast effect of opticglass _WBeing divided into 6 types sees the following form.

Classification	1	2	3	4	5	6
							Leach percentage ratio (D _W)	＜0.04	0.04-0.10	0.10-0.25	0.25-0.60	0.60-1.10	＞1.10

The stable D of above-mentioned acidproof effect _A(powder method) pressed the testing method of GB/T17129, according to computes:

D _A＝(B-C)/(B-A)*100

In the formula: D _A-glass leaches percentage ratio (%)

The quality of B-strainer and sample (g)

C-strainer and the quality (g) that corrodes the back sample

A-filter quality (g)

By the leaching percentage ratio that calculates, D is stablized in the acidproof effect of opticglass _ABeing divided into 6 types sees the following form.

Classification	1	2	3	4	5	6
							Leach percentage ratio (D _A)	＜0.20	0.20-0.35	0.35-0.65	0.65-1.20	1.20-2.20	＞2.20

The glass blister quality is measured by GB/T 7962.8-87 specified test, and allowing the air bubble content grade in the glass is by 100cm ³The total sectional area of contained bubble in the glass (diameter of phi>=0.05) is confirmed, is divided into seven grades, sees the following form.Calculus, xln and other inclusion are also made bubble and are calculated.The arithmetical av that the prolate bubble is got major axis and minor axis is that diameter calculates sectional area.

Rank	Diameter of phi >;=0.05mm bubble total sectional area (mm/100cm ³)
		A00	0.003-0.03
A0	0.03-0.10
		A	0.10-0.25
B	0.25-0.50
		C	0.50-1.00
D	1.00-2.00
		E	2.00-4.00

Involved in the present invention to the near infrared light absorber element constitute by said near infrared light heat absorbing glass; Can give an example out the laminal glass elements that is used for the near infrared light absorption filter or lens etc.; Be applicable to the colour correction purposes of solid-state imager, possess good transmission performance and chemicalstability.

Involved in the present invention to the near infrared spectral filter be the near infrared light absorber element that constitutes by the near infrared light heat absorbing glass, therefore also possess good light transmission performance and chemicalstability.

Embodiment

Hereinafter, reference implementation example will be described the present invention in more detail.Yet, the invention is not restricted to said embodiment.

At first, as frit, raw material weighed is the glass that has in table 1 and table 2 composition that shows with fluorochemical, metaphosphate, oxide compound, nitrate salt and carbonate; After mixing fully; Mixing raw material is put in the platinum crucible with sealing of lid, and heating and melting under 700-900 ℃ temperature is after oxygen protection while homogenizing is adopted in clarification; Melten glass is flowed out with constant flow rate from the temperature control pipeline continuously, obtain opticglass of the present invention after the moulding.

Embodiment 1-15 (the manufacturing embodiment of near-infrared absorbing glass)

Table 1

Table 2

R among the table 1-2 ⁺For: Li ⁺, Na ⁺And K ⁺Total content.

Above-mentioned glass processing is become tabular; And optical polish is used to measure transmitance with preparation sample is carried out on two sides respect to one another; Use the spectral transmission appearance to measure the spectral transmittance of each sample, obtain the transmitance of typical wavelengths of each sample of 1mm thickness.

Shown said glass when 1mm thickness among the table 3-4, the transmittance values of glass of the present invention can confirm that said glass all has the excellent properties of proofreading and correct glass as the colour sensitivity that is used for the semi-conductor image-forming component.

Table 3

Table 4

Fig. 1 is the spectral-transmission favtor graphic representation of the foregoing description 1.As can be seen from the figure, be under the situation of 1mm at thickness of glass, the transsmissivity of optimal wavelength 400nm is more than 80%.In the spectral transmittance in 500 to 700nm wavelength region, transmitance is that 50% o'clock corresponding wavelength region is 615 ± 10nm.In the spectral-transmission favtor of wavelength 400-1200nm, the transsmissivity of the wavelength zone of wavelength 800-1000nm is minimum.Because this zone is a near-infrared region, semiconductor camera element is not very low at this regional susceptibility, therefore must suppress the transsmissivity of colour correction with spectral filter, makes it reach fully low degree.And when wavelength during at 1000-1200nm regional, the susceptibility of semi-conductor image-forming component reduces relatively, and therefore the transsmissivity of glass of the present invention increases to some extent.

Claims

1. near infrared light heat absorbing glass; It is characterized in that, when said near infrared light heat absorbing glass thickness is 1mm, show greater than 80% in wavelength 400nm transsmissivity; Show that in wavelength 500nm transsmissivity said near infrared light heat absorbing glass contains the P that useful cation form shows greater than 85% ⁵⁺, Al ³⁺, Li ⁺, R ²⁺And Cu ²⁺, said R ²⁺Represent Mg ²⁺, Ca ²⁺, Sr ²⁺And Ba ²⁺, contain the O that useful anion form shows simultaneously ^2-And F ^-, also contain Cl ^-, Br ^-Or I ^-, and Cl ^-, Br ^-And I ^-The total amount be 0.001-1%, the glass blister quality is measured by GB/T 7962.8-87 specified test, reaches more than the A level.

2. near infrared light heat absorbing glass as claimed in claim 1 is characterized in that, when said near infrared light heat absorbing glass thickness is 1mm,, shows greater than 90% in wavelength 500nm transsmissivity greater than 88% in the demonstration of wavelength 400nm transsmissivity.

3. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 15-35% ⁵⁺The Al of 5-20% ³⁺The Li of 1-30% ⁺The Na of 0-10% ⁺The K of 0-3% ⁺The Cu of 0.1-8% ²⁺R ²⁺Content is 30-65%; Cl ^-, Br ^-And I ^-The total amount be 0.001-1%.

4. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 20-30% ⁵⁺The Al of 10-15% ³⁺The Li of 1-20% ⁺The Na of 0-5% ⁺The K of 0-3% ⁺The Cu of 1.2-5% ²⁺R ²⁺Content is 40-65%; Cl ^-, Br ^-And I ^-The total amount be 0.005-0.5%.

5. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-10% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺R ²⁺Content is greater than 50% but is less than or equal to 65%; Cl ^-, Br ^-And I ^-The total amount be 0.009-0.1%.

6. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-5% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺R ²⁺Content is 54-65%; Cl ^-, Br ^-And I ^-The total amount be 0.01-0.07%.

7. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 15-35% ⁵⁺The Al of 5-20% ³⁺The Li of 1-30% ⁺The Na of 0-10% ⁺The K of 0-3% ⁺The Cu of 0.1-8% ²⁺The Mg of 0.1-10% ²⁺The Ca of 1-20% ²⁺The Sr of 15-35% ²⁺The Ba of 10-30% ²⁺Cl ^-Content is 0.005-1%.

8. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 20-30% ⁵⁺The Al of 10-15% ³⁺The Li of 1-20% ⁺The Na of 0-5% ⁺The K of 0-3% ⁺The Cu of 1.2-5% ²⁺The Mg of 2-8% ²⁺The Ca of 5-15% ²⁺The Sr of 21-30% ²⁺The Ba of 15-30% ²⁺Cl ^-Content is 0.008-0.5%.

9. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-10% ⁺The Na of 0.5-3% ⁺The Cu2 of 1.2-5% ⁺The Mg of 3-7% ²⁺The Ca of 7-11% ²⁺The Sr of 23-28% ²⁺The Ba of 21-30% ²⁺Cl ^-Content is 0.008-0.1%.

10. according to claim 1 or claim 2 near infrared light heat absorbing glass is characterized in that, contains the P of 21-25% ⁵⁺The Al of 10-15% ³⁺The Li of 2-5% ⁺The Na of 0.5-3% ⁺The Cu of 1.2-5% ²⁺The Mg of 3-7% ²⁺The Ca of 7-11% ²⁺The Sr of 23-28% ²⁺The Ba of 21-25% ²⁺Cl ^-Content is 0.009-0.07%.

11., it is characterized in that F like the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-10 ^-Content is 45-60%; O ^2-Content is 40-55%.

12., it is characterized in that F like the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-10 ^-Content is 48-57%; O ^2-Content is 43-52%.

13., it is characterized in that F like the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-10 ^-Content is greater than 50% but is less than or equal to 57%; O ^2-Content is more than or equal to 43% but less than 50%.

14., it is characterized in that F like the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-10 ^-Content is 51-55%; O ^2-Content is 45-49%.

15., it is characterized in that F like the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-10 ^-Content is 51-53%; O ^2-Content is 47-49%.

16. the near infrared light absorber element is characterized in that, is made up of the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-15.

17. the near infrared light absorption filter is characterized in that, is made up of the described near infrared light heat absorbing glass of arbitrary claim among the claim 1-15.