CN101344599B

CN101344599B - Optical element, and optical article and production method

Info

Publication number: CN101344599B
Application number: CN2008101441190A
Authority: CN
Inventors: 中村徹; 宫川晶子
Original assignee: Nikon Corp
Current assignee: Nikon Corp
Priority date: 2001-11-30
Filing date: 2002-12-02
Publication date: 2011-02-09
Anticipated expiration: 2022-12-02
Also published as: CN101059567A; CN101059567B; CN101344599A

Abstract

The present invention discloses an optical element, an optic article and a manufacturing method of optical element. The optical element of the present invention has a first member and a second member which have been joined in close contact, and has nd1 > nd2 and (nF1 - nC1) < (nF2 - nC2), where the first member is formed of a resin having both a benzene ring and a fluorine atom, or the second member is formed of a resin having an alicyclic structure. It also makes use of an optic-purpose resin precursor composition prepared by mixing a first resin precursor having nd < 1.50 and (nF - nC) > 0.003 in an uncured state and a second resin precursor having nd < 1.62 and (nF - nC) > 0.010.

Description

The manufacture method of optical element, optical article and optical element

The application divides an application, and the application number of original application is 02823943.1 (PCT/JP02/12602), the applying date to be that Dec 2, denomination of invention in 2002 are " optical resin precursor composition, optical resin, optical element and optical article ".

Technical field

The present invention relates to a kind of bonding multi-layered type diffraction optical element and manufacture method thereof, comprise this element optical article, be used for the optical resin precursor composition and the optical resin of this element.

Background technology

In recent years, developed the technology of using diffraction optical element complementary color aberration in shooting optics system, the optical material that is fit to the low index of refraction of this technology use, high chromatic dispersion is noticeable.For example special opening proposes in the flat 9-127321 communique, uses by 2 layers of different bonding multi-layered type diffraction optical element that constitutes of optical characteristics, used the optical material of low index of refraction, high chromatic dispersion in the one deck that constitutes this element.

But, well-known, have positive correlativity in the refractive index of optical material with between disperseing, the dispersion of materials that refractive index is low is little, on the contrary the high dispersion of materials of refractive index is big.For this reason, the optical material of low-refraction and high chromatic dispersion is very limited.In fact, disclosed material also almost is an inorganic material in the above-mentioned open communique, and organic material has only only been put down in writing polycarbonate.

Usually, in so bonding multi-layered type diffraction optical element, use inorganics, particularly glass is as optical material.For example open in the 2001-235608 communique, disclose the method for utilizing low-melting glass to make bonding multi-layered type diffraction optical element the spy.

But general inorganic material is than the processability and the insufficient formability of organic material, and fully makes bonding being not easy between the inorganic optical material.And, define glass material, and the forming temperature height, so require thermotolerance, the material of shaping dies also is defined.Because the viscosity height of glass material is difficult to make it to have enough transfer printings when being shaped.

Summary of the invention

The object of the present invention is to provide a kind of can be easy and easy, the bonding multi-layered type diffraction optical element and the manufacture method thereof of the high manufacturing of precision, the optics of material that has the optical article of this element and be suitable as this element is with precursor composition and as the optical resin of its solidfied material.

To achieve these goals, the application's the 1st invention provides a kind of optical resin precursor composition, its be by will be at least (1) refractive index n of d line under its uncured state _dLess than 1.50, and under uncured state from F line refractive index n _FIn deduct C line refractive index n _CPoor (mean dispersion MD) than 0.003 the refractive index n of big the 1st resin precursor and (2) d line under its uncured state _dLess than 1.62, and under uncured state from F line refractive index n _FIn deduct C line refractive index n _CPoor (mean dispersion MD) than 0.010 big the 2nd resin precursor, mix and obtain.

Resin described in this instructions is meant organic high molecular compound.In addition, in this manual, the precursor of resin is so long as just passable by making its curing can obtain the material of resin, and monomer, oligomer, prepolymer, polymkeric substance etc. are any, and all it doesn't matter.

In the optical resin precursor composition of the present invention; the 1st resin precursor does not comprise any one in phenyl ring, sulphur atom, chlorine atom, bromine atoms and the iodine atom, comprises any at least in one or more acryloyl groups, methacryl and the vinyl.The 2nd resin precursor is any one of sulfur atom-containing and halogen atom not, has at least one ring structure, comprises one or more acryloyl groups, methacryl, and vinyl is any at least.Other the 1st resin precursor utilizes following composition formula (1) expression, in molecule, comprise at least one polymerism functional group, the 2nd resin precursor utilizes following composition formula (2) expression, comprises at least one polymerism functional group and comprise at least 1 phenyl ring in molecule in molecule.

C _m1H _n1O _p1N _q1F _r1 ...(1)

(wherein, m1 and n1 are respectively the integers more than or equal to 5, and p1 and q1 are respectively 0 or more than or equal to 1 and smaller or equal to the integer of m1, r1 be 0 or more than or equal to 1 and smaller or equal to the integer of (n1 * 2))

C _s1H _t1O _u1N _v1 ...(2)

(wherein, s1 and t1 are respectively the integers more than or equal to 5, and u1 and v1 are respectively 0 or more than or equal to 1 and smaller or equal to the integer of s1.)

And, the invention provides that a kind of optical resin precursor composition that makes the invention described above solidifies and the optical resin that obtains, comprise the optical element of the 1st parts of forming by this resin and have the optical article of optical element of the present invention.

The application's the 2nd invention provides a kind of diffraction optical element and has the optical article of this bonding multi-layered type diffraction optical element of the present invention, described diffraction optical element is a kind of bonding multi-layered type diffraction optical element, have the 2nd parts that constitute by the 1st resin and the 1st parts that constitute by the 2nd resin of fluid-tight engagement on the 2nd parts, the d line refractive index n of the 2nd parts _D1D line refractive index n than the 1st parts _D2Greatly, the mean dispersion MD1 of the 2nd parts is (just from the F line refractive index n of the 2nd parts _F1Deduct the C line refractive index n of the 2nd parts _C1Poor) than the mean dispersion MD2 of the 1st parts (just from the F line refractive index n of the 1st parts _F2Deduct the C line refractive index n of the 1st parts _C2Poor) little, wherein, comprise that (1) the 1st resin has alicyclic structure in repetitive, and/or (2) the 2nd resins in repetitive, have phenyl ring and fluorine atom the two.

In addition, the invention provides a kind of manufacture method of bonding multi-layered type diffraction optical element, described bonding multi-layered type diffraction optical element has the 2nd parts that are made of the 1st resin and the 1st parts that are made of the 2nd resin of fluid-tight engagement on the 2nd parts, this method comprises the composition that makes the precursor (the 4th resin precursor just) that contains the 1st resin and is shaped, solidify, form the operation of the 2nd parts, the 1st resin has alicyclic structure in repetitive

(the d line refractive index n of the 1st resin _D1The d line refractive index n of)＞(the 2nd resin _D2)

And

(the mean dispersion MD of the 1st resin ₁The mean dispersion MD of)＜(the 2nd resin ₂)

And, the invention provides a kind of manufacture method of bonding multi-layered type diffraction optical element, described bonding multi-layered type diffraction optical element has the 2nd parts that are made of the 1st resin and the 1st parts that are made of the 2nd resin of fluid-tight engagement on the 2nd parts, this method comprises the composition that makes the precursor (the 3rd resin precursor just) that contains the 2nd resin and is shaped, solidify, form the operation of the 1st parts

And

(the mean dispersion MD of the 1st resin ₁The mean dispersion MD of)＜(the 2nd resin ₂).

In addition, here (the mean dispersion MD of the 1st resin ₁The F line refractive index n of)=(the 1st resin _F1The C line refractive index n of)-(the 1st resin _C1)

(the mean dispersion MD of the 2nd resin ₂The F line refractive index n of)=(the 2nd resin _F2The C line refractive index n of)-(the 2nd resin _C2)

In addition, optical resin precursor composition of the present invention also can contain the 3rd resin precursor (precursor of the 2nd resin just) again except that above-mentioned the 1st resin precursor and the 2nd resin precursor.The solidfied material that contains the optical resin precursor composition of the 1st resin precursor and the 2nd resin precursor also can be the 2nd resin.

Description of drawings

Fig. 1 is the sectional view of the bonding multi-layered type diffraction optical element in embodiment 1, the 10th, bonding multi-layered type diffraction optical element, the 11st, the 1st parts that the optical material of the high chromatic dispersion of low-refraction is formed, the 11st, the 2nd parts of forming by the optical material of high-refractivity and low-dispersion.

Fig. 2 is the sectional view that shows the manufacturing process of the bonding multi-layered type diffraction optical element among the embodiment 2.

Fig. 3 is the sectional view that shows the manufacturing process of the bonding multi-layered type diffraction optical element among the embodiment 3.The 20th, bonding multi-layered type diffraction optical element, 21 is the 1st parts, 22 is the 2nd parts, the 23rd, mother metal.

The best mode that carries out an invention

Up to now, the compound of low-refraction and high chromatic dispersion is very limited.The present inventor is in order freely to select to have the material of good processability, formability, cohesive, transfer printing etc., carried out research in depth, found that as long as use composition with particular characteristic, the composition of low-refraction and the phase-splitting that becomes of high chromatic dispersion are mixed, so just can obtain desirable optical characteristics, until having finished the present invention.

The application's the 1st invention obtains the resin of low-refraction and high chromatic dispersion by the 1st composition (the 1st resin precursor) of cooperation low-refraction and the 2nd composition (the 2nd resin precursor) of high chromatic dispersion.Just, the optical resin precursor composition of the application the 1st invention is included in the refractive index n of d line under the uncured state _d＜1.50, and chromatic dispersion (n _F-n _CThe 1st resin precursor of)＞0.003 and under its uncured state the refractive index n of d line _d＜1.62, and chromatic dispersion (n _F-n _CThe 2nd resin precursor of)＞0.010, in addition, these resins can be distinguished independently existence, also can copolymerization.

The 1st resin precursor need have low-refraction (n _d＜1.50), has to a certain degree high chromatic dispersion ((n simultaneously _F-n _C)＞0.003).Such resin does not preferably contain the halogen (chlorine atom, bromine atoms and iodine atom) beyond phenyl ring, sulphur atom and the fluorine that improves refractive index.

Fluorine atom is owing to having the effect that reduces refractive index, so also can use fluorine-containing compound as the 1st resin precursor.But the content of fluorine is preferably in 2 times of hydrogen atom sum in the molecule.When fluorine atom is measured more than this and the mixed resin precursor composition of the 2nd composition solidify and the resin chromatic dispersion sometimes that finally obtains is low excessively.When fluorine atom is too much and the intermiscibility of the 2nd composition poor, white opacity appears in the resin of resin precursor composition and its solidfied material sometimes.The 1st resin precursor preferably has ultra-violet solidified and Thermocurable, preferably contains the functional group that acryloyl group, methacryl, vinyl etc. have polymerism for this reason.In molecule, can there be 1 this functional group in addition, also can exists a plurality of.

The 1st resin precursor like this can use the compound shown in the following composition formula (1) that comprises a polymerism functional group in the molecule at least.

C _m1H _n1O _p1N _q1F _r1 ...(1)

(wherein, m1 and n1 are respectively the integers more than or equal to 5, and p1 and q1 are respectively 0 or more than or equal to 1 and smaller or equal to the integer of m1, and r1 is 0 or more than or equal to 1 and smaller or equal to the integer of (n1 * 2).)

The compound that any one molecular formula is represented in the preferred following general formula of the 1st resin precursor (3)～(9) particularly.

Here R ¹, R ³, R ⁵, R ⁷, R ¹²And R ¹⁷Be respectively hydrogen or methyl, R ², R ⁴And R ⁶Be respectively 1 valency organic group, R ⁸Be the organic group of divalent, R ⁹～R ¹¹Be respectively the 1 valency organic group that contains acryloyl group or methacryl, R ¹³, R ¹⁴And R ¹⁶Be respectively the organic group of divalent, R ¹⁵, R ¹⁸And R ¹⁹Be respectively the organic group of 1 valency, a, d and f are respectively more than or equal to 2 and smaller or equal to 4 number, b, e and g are respectively the number more than or equal to 1.

In addition, R ², R ⁴, R ⁶And R ⁸A preferred group accepted way of doing sth is C respectively _M2H _N2O _P2N _Q2F _R2The organic group of expression (in the formula, m2 is the integer more than or equal to 1, and p2 and q2 are respectively 0 or more than or equal to 1 integer, n2 is the integer more than or equal to 1, r2 be 0 or smaller or equal to ((n2+5) * 2) and more than or equal to 1 integer), R ⁹～R ¹¹, R ¹³～R ¹⁶, R ¹⁸And R ¹⁹Preferably respectively by C, H and O form.

Be fit in the compound of the present invention as the 1st resin precursor, compound as formula (3) expression for example has: 2,2,2-trifluoroethyl methacrylate, 2,2,2-trifluoroethyl acrylate, β-(perfluor ethyl) ethyl-methyl acrylate, β-(perfluor ethyl) ethyl propylene acid esters, 1,1,1,3,3,3-hexafluoro isopropyl methyl acrylate, 2,2,2-trifluoroethyl methacrylate, 2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoro propyl methyl acid esters, 2,2,3,3-tetrafluoro propyl methyl acid esters, 2,2,3,4,4,4-hexafluoro butyl methyl acrylate, 2,2,3,4,4,4-hexafluoro butyl methyl acrylate, octafluoro amyl group methacrylate, octafluoro amyl group acrylate, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl methacrylate, butyl acrylate, isodecyl methacrylate, isodecyl acrylate, lauryl methacrylate, dodecyl acrylate, methacrylic acid tridecyl ester, tridecyl acrylate, the methacrylic acid cetyl ester, the acrylic acid cetyl ester, the methacrylic acid stearyl, the acrylic acid stearyl, the metering system tert-butyl acrylate, tert-butyl acrylate, methacrylic acid 2-ethylhexyl, 2-ethylhexyl acrylate, acrylic acid 2-hydroxybutyl ester, methacrylic acid 2-hydroxybutyl ester, acrylic acid 2-hydroxyethyl ester, methacrylic acid 2-hydroxyethyl ester, acrylic acid 2-hydroxy-propyl ester, methacrylic acid 2-hydroxy-propyl ester, acrylic acid 3-methoxyl butyl ester, methacrylic acid diethylamino ethyl ester and acrylic acid diethylamino ethyl ester.

The compound that is applicable to formula (4) expression that the 1st of the application invents for example has: 2-ethyl=2-butyl-propylene glycol methacrylate, 2-ethyl=2-butyl-propylene glycol acrylate, 1, the 3-butanediol dimethylacrylate, 1, the 3-butanediol diacrylate, 1, the 6-hexanediol dimethacrylate, 1, the 6-hexanediyl ester, 1,9-nonanediol dimethylacrylate, 1,9-nonanediol diacrylate, 1,10-decanediol dimethylacrylate, 1,10-decanediol diacrylate, season the pentanediol dimethylacrylate, season the pentanediol diacrylate, the dipropylene glycol dimethylacrylate, propylene glycol diacrylate and glycerine dimethylacrylate.

The compound that is applicable to formula (5) expression that the 1st of the application invents for example has: dimethylaminoethyl acrylate methyl base amino-ethyl ester, methacrylic acid 2-ethylhexyl carbitol ester, acrylic acid 2-ethylhexyl carbitol ester, the methacrylic acid butoxy ethyl ester, butoxyethyl acrylate, methacrylic acid ethoxy binaryglycol ester, acrylic acid ethoxy binaryglycol ester, methacrylic acid ten dioxy base macrogol esters, acrylic acid ten dioxy base macrogol esters, methacrylic acid macrogol ester (a=2, b=2～12), polyalkylene glycol acrylate ester (a=2, b=2～12), methacrylic acid polypropylene glycol ester (a=3, b=2～20), acrylic acid polypropylene glycol ester (a=3, b=2～20), methacrylic acid allyloxy macrogol ester, acrylic acid allyloxy macrogol ester, the stearic oxygen base of methacrylic acid alkene macrogol ester, the stearic oxygen base of acrylic acid alkene macrogol ester, acrylic acid octyloxy polyethylene glycol-propylene glycol ester (a=2.4, b=14, ethylidene number in molecule is 8, propylidene in molecule is 6), methacrylic acid octyloxy polyethylene glycol-propylene glycol ester (a=2.4, b=14, ethylidene number in molecule is 8, propylidene in molecule is 6), poly-(propylene glycol-butylene glycol) acrylate, poly-(propylene glycol-butylene glycol) methacrylate, poly-(ethylene glycol-butylene glycol) acrylate, poly-(ethylene glycol-butylene glycol) methacrylate, poly-(ethylene glycol and 1,2-propylene glycol) acrylate, poly-(ethylene glycol and 1,2-propylene glycol) methacrylate, polypropylene glycol acrylate and methoxy polyethylene glycol methacrylate-styrene polymer.

The compound that is applicable to formula (6) expression that the 1st of the application invents for example has: the neopentylglycol dimethacrylate (R of oxirane modification ⁷=methyl, d=f=2, e=g=are more than or equal to 1 integer, R ⁸=C ₅H ₁₀) and the neopentylglycol diacrylate (R of epoxy pronane modification ⁷=hydrogen atom, d=f=3, e=g=are more than or equal to 1 integer, R ⁸=C ₅H ₁₀).

The compound that is applicable to formula (7) expression that the 1st of the application invents for example has: three (acryloxy ethyl) isocyanates (R ⁹, R ¹⁰, R ¹¹All be CH ₂CH ₂OCOCH=CH ₂) and three (methacryloxyethyl) isocyanates (R ⁹, R ¹⁰, R ¹¹All be CH ₂CH ₂OCOC (CH ₃)=CH ₂).

The compound that is applicable to formula (8) expression that the 1st of the application invents for example has: the glycerine triacrylate (R of chloropropylene oxide modification ¹²And R ¹⁵Be hydrogen atom, R ¹³For-OCH ₂CH (OH) CH ₂-, R ¹⁴And R ¹⁶For-CH ₂OC ₂CH (OH) CH ₂-), the glycerine triacrylate (R of oxirane modification ¹²And R ¹⁵Be hydrogen atom, R ¹³For-(C ₂H ₄O) _J1-, R ¹⁴And R ¹⁶For-CH ₂(C ₂H ₄O) _J1-, j1 is the integer more than or equal to 1), the glycerine triacrylate (R of epoxy pronane modification ¹²And R ¹⁵Be hydrogen atom, R ¹³For-(C ₃H ₆O) _J1-, R ¹⁴And R ¹⁶For-CH ₂(C ₃H ₆O) _J1-, j1 is the integer more than or equal to 1), the trimethylolpropane triacrylate (R of caprolactone modification ¹²Be hydrogen atom, R ¹³For-(C ₅H ₁₂COO) _J1-, R ¹⁴And R ¹⁶For-CH ₂(C ₃H ₆O) _J1-, R ¹⁵For ethyl, j1 are the integer more than or equal to 1), the trimethylolpropane triacrylate (R of oxirane modification ¹²Be hydrogen atom, R ¹³For-(C ₂H ₄O) _J2-, R ¹⁴And R ¹⁶For-CH ₂(C ₂H ₄O) _J2-, R ¹⁵For ethyl, j2 are integer) and the trimethylolpropane triacrylate (R of epoxy pronane modification ¹²Be hydrogen atom, R ¹³For-(C ₃H ₆O) _J2-, R ¹⁴And R ¹⁶For-CH ₂(C ₃H ₆O) _J2-, R ¹⁵For ethyl, j2 are integer).

In suitable formula (8) compound of the application's the 1st invention, R ¹⁴And R ¹⁶Be methylene-CH ₂-compound for example have: pentaerythritol triacrylate, trimethylolpropane triacrylate, trimethylol-propane trimethacrylate, tetramethylol methane tetraacrylate etc.

The compound that is applicable to formula (9) expression that the 1st of the application invents for example has: dipentaerythritol hydroxyl five acrylate (R ¹⁷Be hydrogen atom, R ¹⁸For-CH ₂OH, R ¹⁹For-CH ₂OCOCH=CH) and two (trimethylolpropane) tetraacrylate (R ¹⁷Be hydrogen atom, R ¹⁸And R ¹⁹Be ethyl).

In addition, 3-hydroxypivalic acid neopentylglycol diacrylate, iso stearyl mono acrylic ester, iso stearyl monomethacrylates, p-tert-butyl benzoic acid vinyl acetate, methoxy ethyl methacrylate etc. also are suitable as the 1st resin precursor in the 1st invention.

These the 1st resin precursors can use separately, also can share at least 2 kinds.

Have high chromatic dispersion and low-refraction for making the 1st and the 2nd resin precursor mix the resin precursor and the solidfied material thereof that obtain, it is high chromatic dispersion (n that the 2nd resin precursor had both needed _F-n _C＞0.010), also needing is low-refraction (n _d＜1.62).For the 2nd resin precursor,, preferably do not contain the key element that sulfur molecule or halogen atom etc. increase refractive index for when not improving refractive index as far as possible, not realizing high chromatic dispersion.In order to reach high chromatic dispersion, preferably in molecule, contain ring structures such as phenyl ring.Ring structure also can be a structure of having only singly-bound (σ key) to form, but in order to obtain high dispersion characteristics, preferred phenyl ring has the ring of π key like this.For the 2nd resin precursor also has optical polymerism, thermal polymerization etc. with the 1st resin precursor, preferably in molecule, contain the polymerism functional group of acryloyl group, methacryl base class.

The 2nd resin precursor like this can use following composition formula (2) expression, contains the compound that contains 1 phenyl ring in a polymerism functional group and the molecule at least in molecule at least.

C _s1H _t1O _u1N _v1 ...(2)

(in the formula, s1 and t1 are respectively the integers more than or equal to 5, and u1 and v1 are respectively 0 or more than or equal to 1 and smaller or equal to the integer of s1.)

The 2nd resin precursor for example has: contain bisphenol-A structure acrylate/methacrylate, contain other acrylate/methacrylate, styrene etc. of phenyl ring, the compound of preferred particularly following general formula (10)～(12) any one expression.

Here R ²⁰And R ²²Be respectively hydrogen atom or methyl, R ²¹And R ²³The organic group of difference divalent, Z ¹For containing the divalent organic group of at least one ring structure, Z ²Be 3 valency organic groups, h and i are respectively integer.R in addition ²¹And R ²³Be preferably C, H and O respectively and form Z ¹Be preferably the organic group of following structural formula (13)～(15) any one expression, Z ²Be preferably the organic group of following structural formula (16) expression.

The compound that is fit to the application's the 1st invention as the 2nd resin precursor, for example the compound as formula (10) expression has: the bisphenol a diacrylate (R of oxirane modification ²⁰Be hydrogen atom, R ²¹For-(OCH ₂CH ₂) _K1-, R ²²Be methyl, R ²³For-(OCH ₂CH ₂) _K2-, k1 and k2 be integer), the bisphenol a dimethacrylate (R of oxirane modification ²⁰Be hydrogen atom, R ²¹For-(OCH ₂CH ₂) _K1-, R ²²Be methyl, R ²³For-(OCH ₂CH ₂) _K2-, k1 and k2 be integer), the bisphenol a diacrylate (R of epoxy pronane modification ²⁰Be hydrogen atom, R ²¹For-(OCH ₂CH ₂CH ₂) _K1-, R ²²Be methyl, R ²³For-(OCH ₂CH ₂CH ₂) _K2-, k1 and k2 be integer), the bisphenol a dimethacrylate (R of epoxy pronane modification ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂CH ₂) _K1-, R ²³For-(OCH ₂CH ₂CH ₂) _K2-, k1 and k2 be integer), the Bisphenol F diacrylate (R of oxirane modification ²⁰And R ²²Be hydrogen atom, R ²¹For-(OCH ₂CH ₂) _K1-, R ₂₃For-(OCH ₂CH ₂) _K2-, k1 and k2 be integer), the Bisphenol F dimethylacrylate (R of oxirane modification ²⁰Be methyl, R ²¹For-(OCH ₂CH ₂) _K1-, R ²²Be hydrogen atom, R ²³For-(OCH ₂CH ₂) _K2-, k1 and k2 be integer), the Bisphenol F diacrylate (R of epoxy pronane modification ²⁰And R ²²Be hydrogen atom, R ²¹For-(OCH ₂CH ₂CH ₂) _K1-, R ²³For-(OCH ₂CH ₂CH ₂) _K2-, k1 and k2 be integer), the Bisphenol F diacrylate (R of epoxy pronane modification ²⁰Be hydrogen atom, R ²¹For-(OCH ₂CH ₂CH ₂) _K1-and R ²²Be hydrogen atom, R ²³For-(OCH ₂CH ₂CH ₂) _K2-, k1 and k2 be integer), the bisphenol a diacrylate (R of epoxy ethane-epoxy propane modification ²⁰Be hydrogen atom, R ²¹For-(OCH ₂CH ₂) _K1-(OCH ₂CH ₂CH ₂) _K2, R ²²Be methyl, R ²³For-(OCH ₂CH ₂) _K3-(OCH ₂CH ₂CH ₂) _K4, k1～k4 is integer) and the bisphenol a dimethacrylate (R of epoxy ethane-epoxy propane modification ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _K1-(OCH ₂CH ₂CH ₂) _K2, R ²³For-(OCH ₂CH ₂) _K3-(OCH ₂CH ₂CH ₂) _K4, k1～k4 is integer).

The compound that is fit to formula (11) expression of the application's the 1st invention for example has: Z ¹Base by the 2-acrylic acid [5,5 '-(9H-fluorenes-9-pitch base) two { (1,1 '-diphenyl)-2-gathers (oxygen-2,1-ethane two bases) }] of formula (13) expression, reach Z ¹Base is by 2-acrylic acid [5,5 '-{ 4-(1,1 '-xenyl) methylene } two { (1,1 '-diphenyl)-2-gathers (oxygen-2,1-ethane two bases) }], the Z of formula (14) expression ¹Base is by the 2-acrylic acid [(hydroxyl-2,1-ethane two bases) are gathered in (1-phenyl ethylidene) two { 4, the 1-phenylene }] of formula (15) expression] etc.

The compound of formula (12) expression, for example Z ²Base is with 1 of formula (16) expression, two (to the acryloxy the ethoxyl phenenyl)-1-[of 1-to "-1 '-(to '-the acryloyl-oxy base oxethyl) phenyl-1 '-Methylethyl phenyl] ethane, be suitable for the application's the 1st invention.

In addition, 2, two [4-(methacryloxy ethoxy) phenyl] propane, 2 of 2-, two [4-(methacryloxy diethoxy) phenyl] propane, 2 of 2-, two [4-(the many ethoxys of the methacryloxy) phenyl] propane, 2 of 2-, two [4-(acryloxy diethoxy) phenyl] propane of 2-, phenoxyethyl acrylate, phenoxy group diethylene glycol acrylate, phenoxy group polyethylene glycol acrylate, 2-hydroxyl-3-phenoxy propyl acrylate etc. also are suitable as the 2nd resin precursor in the application's the 1st invention.

These the 2nd resin precursors can use a kind of compound separately, also can share at least 2 kinds compound.

The resin precursor composition of the application the 1st invention contain the above-mentioned the 1st and the basis of the 2nd resin precursor on, also can suitably contain the 5th resin precursor adjusting viscosity and use, polymerization initiator etc.The polymerization initiator that is fit in the resin precursor composition of the application's the 1st invention for example has benzophenone; the methane-sulforic acid dihydroxy benaophenonel; the adjacent benzoyl group methyl ester of benzoic acid; to chlorobenzophenone; to the dimethylamino benzophenone; diphenylhydroxyethanone; the diphenylhydroxyethanone allyl ether; the diphenylhydroxyethanone methyl ether; the diphenylhydroxyethanone ethylether; the diphenylhydroxyethanone butyl ether; the diphenylhydroxyethanone propyl ether; acetophenone; diethoxy acetophenone; the 1-hydroxycyclohexylphenylketone; benzyl dimethyl ketal; 2-hydroxy-2-methyl propiophenone; 1-(4-isopropyl phenyl)-2-hydroxy-2-methyl propiophenone; 1-phenyl-1; the light trigger of the adjacent benzoyl group oxime of 2-propane diketone-2-etc.; and following thermal initiator: azo-compound (azoisobutyronitrile; dimethyl-2,2-azo-bis-isobutyrate etc.); superoxide (benzoyl peroxide; di-tert-butyl peroxide etc.).

In the application's the 1st invention, optical resin is provided, it is to make the resin precursor of above-mentioned the application the 1st invention solidify the solidfied material that obtains.D line refractive index n after its curing of the optical resin of the application's the 1st invention _dLess than 1.55, and, the F line refractive index n after solidify _FDeduct the C line refractive index n after the curing _CDifference preferably big than 0.010.

In the application's the 1st invention, provide the optical element that contains the 1st parts of forming by the optical resin of the application's the 1st invention.The optical element of the application the 1st invention is suitable as still camera, video camera, glasses, telescope, binoculus, microscope, CD/photomagneto disk and reads with measuring lens in the lens etc., diffraction grating etc.The application's the 1st invention also provides these optical articles of the optical element with the application's the 1st invention.

In addition, the optical resin of the application's the 1st invention is except that simple lens, the composite optic element that can be used for resin-bond type optical element etc., be particularly suitable for bonding multi-layered type diffraction optical element 10 shown in Fig. 1 (b), it has the 1st parts 11 be made up of the optical material of low-refraction, high chromatic dispersion and by high index of refraction, the glass of low chromatic dispersion or the 2nd parts 12 that resin constitutes.

In the application's the 1st invention, provide have the 1st parts formed by the optical resin of the application the 1st invention and with the optical element of the 2nd parts of the 1st parts fluid-tight engagement.Here as the 2nd parts, so long as d line refractive index n _D2D line refractive index n than the 1st parts _D1Greatly, its chromatic dispersion is (just from the F line refractive index n of the 2nd parts _F2Deduct the C line refractive index n of the 2nd parts _C2Poor) than the chromatic dispersion of the 1st parts (just from the F line refractive index n of the 1st parts _F1Deduct the C line refractive index n of the 1st parts _C1Poor) little optical material, the element that just can obtain having useful especially optical characteristics.Particularly, the refractive index by increasing the 1st and the 2nd parts two materials poor, the diffraction grating height reduces, and makes to become easily, can reduce the dependence of diffraction efficiency to angle in addition.By increasing the dispersion differences of two materials, can reduce the dependence of diffraction efficiency in addition to wavelength.

In the 2nd parts, can use glass or resin in addition, but preferably use glass transition temperature Tg to be lower than 400 ℃ glass.Here comprise collosol and gel glass, unorganic glass, organic glass etc., normally refractive index n in the glass _dBe 1.4～2.0, Abbe number v _dIt is about 20～100 transparent material.The constituent that constitutes inorganic material for example has SiO ₂, B ₂O ₃, P ₂O ₅, Na ₂O, K ₂O, CaO, BaO, MgO, ZnO, PbO, MnO, Al ₂O ₃, Fe ₂O ₃, Sb ₂O ₃, As ₂O ₃, TiO ₂, La ₂O ₃, ZrO ₂, KHF ₂Deng.In addition, organic glass for example has polyacrylate, polymethacrylate, Polyvinylchloride, polyester, xylonite, cellulose derivative etc.

The manufacturing process of the 2nd parts is not particularly limited, and for example can use the method for the shape of transfer printing shaping dies when material is cured, perhaps injection moulding technology etc.And, in the 2nd parts, use under the situation of glass, can use grinding that shape is improved, perhaps utilize the shaping grinding stone of grille-like with reversing, the limit broken carries out the method for shape transferred thereon, by making at high temperature softening glass contact metal pattern transfer printing shape, glass impression technique etc. just.In addition, under the situation of using the glass impression technique, for the diffraction grid, the shape of carrying out transfer printing is than common complexity such as non-spherical lens, thereby is difficult to carry out the processing of thermotolerance mould.But, can enlarge the range of choice of spendable mould by using the low low-melting glass of glass transition temperature Tg.

The 1st resin that is fit to the application's the 2nd invention for example has: ester ring type olefin resin, ester ring type acryl resin, ester ring type urethane resin, have the resin of episulfide structure and the Epocryl of alicyclic structure.These can be used alone resin, also can mix at least 2 kinds of resins and use.In order further to improve optical characteristics, the 1st resin contains sulphur atom particularly preferably in repetitive in addition.

As the ester ring type olefin resin that the 1st resin is fit to, the compound of following general formula (17) expression is for example arranged.

Here R ³¹And R ³²It is the organic group of 1 valency or divalent.R ³¹And R ³²During for the organic group of divalent, mutually combining forms the part of ring structure.N is the integer more than or equal to 1 in addition.The ester ring type olefin resin that uses in the application's the 2nd invention preferably has 5000～45000 molecular weight.

The ester ring type olefin resin of this formula (17) is according to substituent R ³¹And R ³²Structure and combination different, resin properties changes.R ³¹And R ³²Bonding forms ring structure, and when forming bulky atomic group, resin becomes water white transparency, thereby is suitable as optical element.As such R ³¹And R ³²The resin of formation ring structure for example has any one the represented resin among the following structural formula group (18).M is 0 or more than or equal to 1 integer in addition.

The ester ring type olefin resin that uses in the application's the 2nd invention can only be formed by any a kind in these repetitives, also can be the multipolymer of at least 2 kinds repetitive formation.

If this ester ring type olefin resin has the big organic compatibility of polar group and inorganics or polarity in molecule as following general formula (19) just high, 2 times processability improves, therefore preferred the use.

Here n is the integer more than or equal to 1.The ester ring type olefin resin that uses in the application's the 2nd invention preferably has 5000～45000 molecular weight.R ³³Be the polar group of acyl group, acyloxy etc., R ³⁴Be organic groups such as hydrogen atom or alkyl.R ³³And R ³⁴Combination (R is for example arranged ³³/ R ³⁴)=(CO ₂CH ₃/ H), (CO ₂CH ₃/ CH ₃), (CO ₂CH ₅/ CH ₃) etc.

The ester ring type acryl resin is a kind of material that has alicyclic structure on the side chain of acryl resin.The ester ring type acryl resin that is fit to the 1st resin for example has the resin of following general formula (20) expression.

Here, R ³⁵Be hydrogen or alkyl (for example methyl).R ³⁶Be cyclic aliphatic group, the naphthenic base of any one expression among for example preferred following structural formula group (21).P is the integer more than or equal to 1, and the ester ring type acryl resin that the application's the 2nd invention is used preferably has 5000～45000 molecular weight.

In addition, these cyclic aliphatic groups also can have substituting group shown in following structural formula (22).This substituting group can be the group that contains sulphur atom of sulfane base etc.

The ester ring type olefin resin that uses in the application's the 2nd invention is as R ³⁶Can only have any a kind in these cyclic aliphatic groups, also can be to contain at least 2 kinds multipolymer in a molecule.In addition, also can be in molecule except that repetitive with formula (20) expression, have any at least multipolymer in the repetitive of following general formula (23) expression again.Here R ³⁷Be ethyl or methyl.

The polyurethane that the ester ring type ammonia ester resin that is fit to the 1st resin for example has diisocyanate cpd with alicyclic structure and polyol compound or multi-thioalcohol compound reaction to generate.

Diisocyanate cpd with alicyclic structure for example has: the diisocyanate cpd with alicyclic structure of following general formula (24) expression, or isophorone diisocyanate, di-2-ethylhexylphosphine oxide (4 cyclohexyl isocyanate), hydrogenation xylyl diisocyanate etc.These can use separately, also can share at least 2 kinds.

Here, R ³⁸And R ³⁹Be hydrogen atom or methyl.Such diisocyanate for example has: 4, and-dicyclohexyl methyl hydride diisocyanate, 4,4-isopropylidene two (cyclohexyl isocyanate) etc.

The polyol compound that is fit to the application's the 2nd invention for example has: ethylene glycol, propylene glycol, neopentyl glycol, diethylene glycol, dipropylene glycol, hydrogenated bisphenol A, 2,2 '-two (4-hydroxyl propoxyl group phenyl) propane, 1,3-butylene glycol, 1,4-butylene glycol, 1,5-pentanediol, 1,6-hexanediol, propylene glycol, triethylene glycol, pentaerythrite diallyl ether etc.The multi-thioalcohol compound that is fit to the application's the 2nd invention in addition for example has 1 of following structural formula (25) expression, two [(2-mercaptoethyl) the sulphur]-3-sulfydryl propane of 2-.

These polyvalent alcohols and polythiol can use any separately, also can at least 2 kinds of mixing use.The use amount of polythiol is many more in addition, tends to the refractive index height more, thereby preferred the use.

The ester ring type urethane resin that is fit to the 1st resin also can be that itself and (methyl) acrylate with hydroxyl are reacted, and carries out carbamate (methyl) acrylate of acroleic acid esterification or methacrylated.For example have as (methyl) acrylate: 2-hydroxyethyl (methyl) acrylate, hydroxypropyl (methyl) acrylate, polyethyleneglycol (methyl) acrylate, polypropylene glycol list (methyl) acrylate, glycerine mono acrylic ester, glycerine diacrylate etc. with hydroxyl.

The resin with episulfide structure that is suitable as the 1st resin is a kind of organic high molecular compound, wherein contains at least 1 atomic group by following structural formula (26) expression in 1 molecule.

In the formula, R ⁴⁰Alkyl, the R of expression carbon number 1～10 ⁴¹, R ⁴²And R ⁴³The alkyl of representing hydrogen atom or carbon number 1～10 respectively.X represents sulphur atom or oxygen atom.The quantity of sulphur atom preferably on average at least 50% in the X base sum that contains in molecule.

The atomic group of structural formula (26) expression preferably has at least 2 in a molecule.Have bonding the compound of chain aliphatic backbone of at least 2 these atomic groups for example have: two (β-epithio rosickyite base) methane, 1, two (β-epithio rosickyite base) ethane of 2-, 1, two (β-epithio rosickyite base) propane of 3-, 1, two (β-epithio rosickyite base) ethane of 2-, 1-(β-epithio rosickyite base)-2-(β-epithio rosickyite ylmethyl) propane, 1, two (β-epithio rosickyite base) butane of 4-, 1, two (β-epithio rosickyite base) butane of 3-, 1-(β-epithio rosickyite base)-3-(β-epithio rosickyite ylmethyl) butane, 1, two (β-epithio rosickyite base) pentanes of 5-, 1-(β-epithio rosickyite base)-4-(β-epithio rosickyite ylmethyl) pentane, 1, two (β-epithio rosickyite base) hexanes of 6-, 1-(β-epithio rosickyite base)-5-(β-epithio rosickyite ylmethyl) hexane, 1-(β-epithio rosickyite base)-2-[(2-β-epithio rosickyite base ethyl) sulphur] ethane, 1-(β-epithio rosickyite base)-2-[[2-(2-β-epithio rosickyite base ethyl) sulphur ethyl] sulphur] ethane etc. is suitable for the application the 2nd invention.The hydrogen of the episulfide group of these compounds has 1 compound that also is suitable as the application's the 2nd invention by methyl substituted compound at least.

The ring-shaped fat compounds of group of the atomic group of 2 structural formulas of bonding (26) expression for example has: 1, two (β-epithio rosickyite base) cyclohexanes of 3-, 1, two (β-epithio rosickyite base) cyclohexanes of 4-, 1, two (β-epithio rosickyite ylmethyl) cyclohexanes of 3-, 1, two (β-epithio rosickyite ylmethyl) cyclohexanes of 4-, two [4-(β-epithio rosickyite base) cyclohexyl] methane, 2, two [4-(β-epithio rosickyite base) cyclohexyl] propane of 2-, two [4-(β-epithio rosickyite base) cyclohexyl] sulfide, 2, two [the 4-(β-epithio rosickyite ylmethyl)-1 of 5-, the 4-dithione, 2, two (β-epithio rosickyite base ethyl sulfidomethyl)-1 of 5-, the annular aliphatic organic compound of 4-dithione etc. is fit to the application's the 2nd invention.The methyl substituted compound of at least 1 usefulness of the hydrogen of the episulfide base of these compounds also is suitable as the material of the application's the 2nd invention.

Be suitable as the Epocryl with alicyclic structure of the 1st resin, for example have following alicyclic structure: cycloalkanes structures such as cyclopentane, cyclohexane, cyclooctane; With benzene, naphthalene, anthracene, pentalene, indenes,, heptalene, biphenylene, イ Application ダセ Application, acenaphthylene, fluorenes, phenanthrene, fluoranthene, the luxuriant and rich with fragrance alkene (アセ Off エ Na Application トリレ Application) of vinegar, aceanthrylene (アセア Application トリレ Application), benzo [9,10] benzene,, the aromatic ring of pyrene, naphthonaphthalene, picene, perylene, pentaphene, pentacene, bisphenol-A, Bisphenol F, bisphenol S, novolac resin etc. carries out the hydrogenation ring texture behind the hydrogenation (hydrogenation);

Multiring structures such as tristane, norbornane, norbornane, dicyclo pentane, pinane, bornylane;

Spiral shell [3.4] octane, 2,4,8, spirane structures such as 10-four oxaspiros [5.5] undecane;

Heterocycle structures such as oxa-penta ring, thia penta ring, sila penta ring (シロラ Application), dioxane, チオイサチア Application;

Make the hydrogenation heterocycle structure behind the following unsaturated group hydrogenation: thiazole, Evil thiazine, dithiazine, furans, thiophene, pyrroles, oxazole, imidazoles, pyrans, pyridine, pyrrolin, piperidines, piperazine, morpholine, indoles, quinoline, xanthene, carbazole, acridine, indoline, chromanane etc.In initiation material, has the material of phenolic hydroxyl group because the yield height improves the purity of epoxy acrylate, so preferred.

In addition, when having the Epocryl of alicyclic structure from the compound with saturated cyclic structure is synthetic, with chloropropylene oxide or diglycidyl the compound with saturated cyclic structure is carried out glycidyl ether, make itself and ends such as acrylic acid, methacrylic acid have the compound reaction of polymerism unsaturated group and carboxyl then, compound shown in the synthetic following structural formula (27) makes its polymerization just passable then.In addition in formula (27), R ⁴⁴Organic group (preferred alkyl) for divalence.

With the material with phenolic hydroxyl group is under the situation of initial substance, with chloropropylene oxide with initial substance diglycidyl ether after, be hydrogenated into the saturated cyclic structure, make itself and ends such as acrylic acid, methacrylic acid have the compound reaction of polymerism unsaturated group and carboxyl then, compound shown in the synthetic following structural formula (28) makes its polymerization just passable then.Q is the integer more than or equal to 1 in addition

The 2nd resin does not preferably contain any one in sulphur atom, chlorine atom, bromine atoms and the iodine atom in molecule.The 2nd resin is not because can be shaped by the high temperature heating, so preferred ultraviolet curing resin.

The fluorine resin that is suitable as the 2nd resin use of using in the application's the 2nd invention for example has: 2,2, and 2-trifluoroethyl methacrylate, 2,2,2-trifluoroethyl acrylate, β-(perfluor ethyl) ethyl-methyl acrylate, β-(perfluor ethyl) ethyl propylene acid esters, 1,1,1,3,3,3-hexafluoro isopropyl methyl acrylate, 1,1,1,3,3,3-hexafluoro isopropylacrylic acid ester, 2,2,2-trifluoroethyl methacrylate, 2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoro propyl methyl acid esters, 2,2,3,3-tetrafluoro propyl methyl acid esters, 2,2,3,4,4,4-hexafluoro butyl methyl acrylate, 2,2,3,4,4,4-hexafluoro butyl methyl acrylate, octafluoro amyl group methacrylate, octafluoro amyl group acrylate etc.

Being suitable as the resin that contains phenyl ring that the 2nd resin that uses in the application the 2nd invention uses for example has: make the compound of any one expression in following general formula (29)～(31) or 2-hydroxyl-3-phenoxy propyl (methyl) acrylate, phenoxy group ethyl (methyl) acrylate, phenoxy group diethylene glycol (methyl) acrylate, benzyl (methyl) acrylate, cumenyl phenoxy group ethylene glycol (methyl) acrylate etc. is carried out polymerization and the resin that obtains.

In formula (29), R ⁴⁵And R ⁴⁶Be respectively hydrogen atom, methyl or trifluoromethyl, R ⁴⁷And R ⁴⁸Be respectively-(OCH ₂CH ₂) _a-(OCH ₂CH ₂CH ₂) _b-.Wherein, a and b are respectively 0 or more than or equal to 1 integer.

The compound of formula (29) expression for example has:

Bisphenol a diacrylate (the R of EO modification ⁴⁵Be hydrogen atom, R ⁴⁶Be methyl, R ⁴⁷For-(OCH ₂CH ₂) _F1, R ⁴⁸For-(OCH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol a dimethacrylate (the R of EO modification ⁴⁵Be hydrogen atom, R ⁴⁶Be methyl, R ⁴⁷For-(OCH ₂CH ₂) _F1-, R ⁴⁸For-(OCH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol a diacrylate (the R of PO modification ⁴⁵Be hydrogen atom, R ⁴⁶Be methyl, R ⁴⁷For-(OCH ₂CH ₂CH ₂) _F1-, R ⁴⁸For-(OCH ₂CH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol a dimethacrylate (the R of PO modification ⁴⁵Be hydrogen atom, R ⁴⁶Be methyl, R ⁴⁷For-(OCH ₂CH ₂CH ₂) _F1-, R ⁴⁸For-(OCH ₂CH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol F diacrylate (the R of EO modification ⁴⁵Be hydrogen atom, R ⁴⁶For-CF ₃, R ⁴⁷For-(OCH ₂CH ₂) _F1, R ⁴⁸For-(OCH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30).

Bisphenol F dimethylacrylate (the R of EO modification ⁴⁵Be methyl, R ⁴⁶Be hydrogen atom, R ⁴⁷For-(OCH ₂CH ₂) _F1-, R ⁴⁸For-(OCH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol F diacrylate (the R of PO modification ⁴⁵Be hydrogen atom, R ⁴⁶Be hydrogen atom, R ⁴⁷For-(OCH ₂CH ₂CH ₂) _F1-, R ⁴⁸For-(OCH ₂CH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol F diacrylate (the R of PO modification ⁴⁵Be methyl, R ⁴⁶Be hydrogen atom, R ⁴⁷For-(OCH ₂CH ₂CH ₂) _F1-, R ⁴⁸For-(OCH ₂CH ₂CH ₂) _G1-, f1 and g1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol-A acrylate (the R of EO, PO modification ⁴⁵Be hydrogen atom, R ⁴⁶Be methyl, R ⁴⁷For-(OC ₂H ₄) _F1-(OC ₃H ₆) _G1-, R ⁴⁸For-(OC ₂H ₄) _H1-(OC ₃H ₆) _I1-, f1, g1, h1 and i1 be the integer more than or equal to 1, preferably is not higher than 30),

Bisphenol-A methacrylate (the R of EO, PO modification ⁴⁵Be methyl, R ⁴⁶Be methyl, R ⁴⁷For-(OC ₂H ₄) _F1-(OC ₃H ₆) _G1-, R ⁴⁸For-(OC ₂H ₄) _H1-(OC ₃H ₆) _I1-, f1, g1, h1 and i1 be the integer more than or equal to 1, preferably is not higher than 30).

In addition, in formula (30), Z is the divalent group of any one expression among the following structural formula group (32), and r and t are respectively the integer more than or equal to 1, preferably are no more than 10.

The compound of formula (30) expression for example has: 2-acrylic acid 5,5 '-[9H-fluorenes-9-pitches base] two [(1,1 '-diphenyl)-poly-(oxygen-2 of 2-, 1-ethane two bases)] ester, 2-acrylic acid 5,5 '-[4-(1,1 '-xenyl) methylene] two [(1,1 '-diphenyl)-poly-(oxygen-2 of 2-, 1-ethane two bases)] ester, two [(4, the 1-phenylene gathers (oxygen-2,1-ethane two the bases)) esters etc. of 2-acrylic acid (1-phenyl ethylidene).

The compound of formula (31) expression is 2-acrylic acid 1-[4-{1-(4-phenylene oxygen base ethyl)-1-Methylethyl } phenyl] ethylenebis (4-phenylene oxygen base ethyl) ester.

The two the resin of fluorine atom and phenyl ring that contains that is suitable as the 2nd resin that uses in the application the 2nd invention for example has: by two pure and mild acrylate of any one expression of following structural formula group (33) or the resin that the methacrylate reaction obtains.These resins also can ethane via epoxyethane (EO just) modification or epoxypropane (PO just) modification.

The compound that is fit to these the 2nd resins can use a kind separately, also can at least 2 kinds of mixing use.Also can be its multipolymer in addition.

In the application's the 2nd invention, the d line refractive index n of the 2nd parts _D1Be at least the mean dispersion MD of 1.45, the 2 parts ₁Preferably be no more than 0.02.In addition, the d line refractive index n of the 1st parts _D1Be no more than the mean dispersion MD of 1.60, the 1 parts ₂Preferably at least 0.01.

Therefore, only the invention provides and form, d line refractive index n by organism _dFor being no more than 1.60, mean dispersion MD is at least 0.01, d line refractive index n _dAnd have between the above-mentioned mean dispersion MD

n _dThe optical material of≤8.8 * MD+1.402 relation, and the optical element that contains the 1st parts that are made of this optical material is provided.

D line refractive index n from the 2nd parts _D1Deduct the d line refractive index n of the 1st parts _D2The difference of trying to achieve is more than or equal to 0.03, from the mean dispersion MD of the 2nd parts ₁Deduct the mean dispersion MD of the 1st parts ₂The difference of trying to achieve preferably at the most-0.003.

Be applied in the 1st and the 2nd parts by the resin that refringence is big like this, can reduce the height of diffraction grid.Except that easy to manufacture, can reduce the dependence of angle of diffraction efficiency.By in the 1st and the 2nd parts, using the big resin of difference of mean dispersion, can reduce the dependence of diffraction efficiency in addition to wavelength.

The forming method of the 1st parts and the 2nd parts is not particularly limited, when for example can materials used solidifying, and the method for the shape of transfer printing shaping dies, perhaps injection moulding technology etc.The method of Gu Huaing can be undertaken by heating or cooling according to the kind of the resin that uses in addition, also can be undertaken by illumination.The parts that form for back in the 1st parts and the 2nd parts, for the parts that prevent forming deform and go bad, preferably the ultraviolet curing resin that do not heat of employing makes its curing by illumination.

The application the 2nd invention because with resin form the 1st and the 2nd parts the two, so under uncured or softening low viscosity state, carry out moulding, can be filled in fully in the mold slots, can reach good transfer printing.In addition, since lower with glassy phase than forming temperature, so the range of choice of moulding material is wide.For this reason, utilize the application's the 2nd invention can make high-precision bonding multi-layered type diffraction optical element at low cost.The material of mother metal is not particularly limited in addition, can be that resin also can be a glass.

The optical element of the application's the 2nd invention is suitable for optics systems such as still camera, video camera, telescope, binoculus, microscope, or CD/photomagneto disk reads with measuring lens.The application's the 2nd invention also provides these optical articles of the optical element with the application's the 2nd invention.

Embodiment

＜embodiment 1 〉

A. the preparation of resin precursor composition

(1) resin precursor composition I

The 1st resin precursor uses 2,2 shown in the above-mentioned formula (3), 2-trifluoroethyl methacrylate (n _d=1.3605, n _F-n _C=0.0075), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=2.2, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5425, n _F-n _C=0.0164), be mixing in 1: 9 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition I.The optical constant of the resin precursor composition I that obtains is: refractive index n _d=1.5243, chromatic dispersion (n _F-n _C)=0.0155.

(2) resin precursor composition II

The 1st resin precursor uses the 1,3 butyleneglycol diacrylate (n shown in the above-mentioned formula (4) _d=1.4500, n _F-n _C=0.0093), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=4, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5322, n _F-n _C=0.0152), be mixing in 3: 7 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition II.The optical constant of the resin precursor composition II that obtains is: refractive index n _d=1.5075, chromatic dispersion (n _F-n _C)=0.0134.

(3) resin precursor composition III

The 1st resin precursor uses the dimethyl amino ethyl methacrylate (n shown in the above-mentioned formula (5) _d=1.4391, n _F-n _C=0.0093), the 2nd resin precursor uses the 2-acrylic acid shown in the above-mentioned formula (11) [5,5 '-(9H-fluorenes-9-pitches base) two { (1,1 '-diphenyl)-2-gathers (oxygen-2,1-ethane two bases) }] (n _d=1.610, n _F-n _C=0.0169), be mixing in 5: 5 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition III.The optical constant of the resin precursor composition III that obtains is: refractive index n _d=1.5245, chromatic dispersion (n _F-n _C)=0.0131.

(4) resin precursor composition IV

The 1st resin precursor uses R ⁷=hydrogen atom, R ⁸For-C ₅H ₁₀-, d and f are 3, e and f are the neopentylglycol diacrylate (n of the epoxy pronane modification of 1 o'clock following formula (6) expression _d=1.446, n _F-n _C=0.0098), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=2.2, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5425, n _F-n _C=0.0164), be mixing in 5: 5 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition IV.The optical constant of the resin precursor composition III that obtains is: refractive index n _d=1.4943, chromatic dispersion (n _F-n _C)=0.0131.

(5) resin precursor composition V

The 1st resin precursor uses R ⁹～R ¹¹All be-CH ₂CH ₂OCOCH=CH ₂The time, three (acryloxy ethyl) isocyanates (n of above-mentioned formula (7) expression _d=1.4520, n _F-n _C=0.0092), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=4, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5322, n _F-n _C=0.0152), be mixing in 4: 6 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition V.The optical constant of the resin precursor composition V that obtains is: refractive index n _d=1.5001, chromatic dispersion (n _F-n _C)=0.0128.

(6) resin precursor composition VI

The 1st resin precursor uses R ¹²And R ¹⁵Be hydrogen atom, R ¹³, R ¹⁴And R ¹⁶For-C ₅H ₁₀-time, the glycerine triacrylate (n of formula (8) representative ring oxidative ethane modification _d=1.4750, n _F-n _C=0.0086), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=4, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5322, n _F-n _C=0.0152), be mixing in 5: 5 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition VI.The optical constant of the resin precursor composition VI that obtains is: refractive index n _d=1.5036, chromatic dispersion (n _F-n _C)=0.0119.

(7) resin precursor composition VII

The 1st resin precursor uses the pentaerythritol triacrylate (n of above-mentioned formula (9) expression _d=1.4822, n _F-n _C=0.0093), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) ^W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=2.2, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5425, n _F-n _C=0.0164), be mixing in 7: 3 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition VII.The optical constant of the resin precursor composition VII that obtains is: refractive index n _d=1.5003, chromatic dispersion (n _F-n _C)=0.0114.

(8) resin precursor composition VIII

The 1st resin precursor uses the pentaerythrite hydroxyl penta 5 acrylate (n of above-mentioned formula (9) expression _d=1.4855, n _F-n _C=0.0089), the 2nd resin precursor uses R ²⁰And R ²²Be methyl, R ²¹For-(OCH ₂CH ₂) _W1-, R ²³For-(OCH ₂CH ₂) _W2-, during w1+w2=2.2, the bisphenol a dimethacrylate (n of the oxirane modification of above-mentioned formula (10) expression _d=1.5425, n _F-n _C=0.0164), be mixing in 7: 3 with the 1st resin precursor and the 2nd resin precursor with volume ratio, fully stir, prepared resin precursor composition VIII.The optical constant of the resin precursor composition VII that obtains is: refractive index n _d=1.5026, chromatic dispersion (n _F-n _C)=0.0112.

(9) resin precursor composition IX

The 1st resin precursor uses 2,2 of above-mentioned formula (9) expression, 2-trifluoroethyl methacrylate (n _d=1.3605, n _F-n _C=0.0075), the 2nd resin precursor uses 1 of above-mentioned formula (12) expression, two (right-the acryloxy the ethoxyl phenenyl)-1-[of 1-to "-1 '-(to '-the acryloyl-oxy base oxethyl) phenyl-1 '-Methylethyl phenyl] ethane; is to mix at 3: 7 the 1st resin precursor and the 2nd resin precursor with volume ratio; fully stir, prepared resin precursor composition IX.The optical constant of the resin precursor composition IX that obtains is: refractive index n _d=1.5121, chromatic dispersion (n _F-n _C)=0.0143.

B. the preparation of optical resin

(1) light-cured type resin

Make among resin precursor composition I～V, the 1-hydroxycyclohexylphenylketone that dissolves 1 weight % respectively stirs fully as Photoepolymerizationinitiater initiater.Then this resin precursor composition is injected the master mold that combines with glass plate, used the high-pressure mercury-vapor lamp irradiation ultraviolet radiation afterwards 2 minutes.The optical constant of the transparent cured thing that mensuration obtains the results are shown in table 1.

Table 1

Resin precursor composition	n _d	n _F-n _C	Gel fraction (%)
				I	1.5440	0.0153	97
II	1.5285	0.0131	98
				III	1.5451	0.0127	98
IV	1.5133	0.0128	97
				V	1.5251	0.0125	97

Gel fraction is following tries to achieve.Resin cured matter that at first will about 0.5g in exsiccator dry about 1 day, its quality of micrometric measurement afterwards (is set at a).Then dried resin is immersed in 70 ℃ the methyl ethyl ketone about 6 hours, methyl ethyl ketone was changed into new in meanwhile per 2 hours.In exsiccator, placed 1 day afterwards.Make resin 100 ℃ of heating 2 hours then, drying was placed 1 hour in exsiccator again, reduced to room temperature, and micrometric measurement quality afterwards (being set at b) is utilized following formula

Gel fraction=(b/a) * 100 (%)

Try to achieve gel fraction.

The reason of the weatherability deterioration of resin, thinking also residually after the moulding has a unreacted functional group, long-time after, take place due to the various subsidiary reactions that make coloring resin etc.The resin that gel fraction is high thinks that unreacted functional group is few, thereby good weatherability.In the reality, it is no problem in practicality that gel fraction is at least 95% resin weatherability, if gel fraction is not less than 96%, then obtains good especially weatherability.

(2) thermohardening type resin

The azoisobutyronitrile that dissolves 0.3 weight % respectively in resin precursor composition VI～IX fully stirs as thermal polymerization.Similarly inject same master mold during then with this resin precursor composition and above-mentioned photocuring.Place baking oven, be warmed up to 60 ℃ from room temperature, be warming up to 80 ℃ with 3 hours afterwards, utilize 2 hours again and be warming up to 100 ℃ with 5 hours, after 100 ℃ of heating 1 hour, cooling, the demoulding obtains water white solidfied material.The optical constant of the transparent cured thing that mensuration obtains the results are shown in the table 2.

Table 2

Resin precursor composition	n _d	n _F-n _C	Gel fraction (%)
				VI	1.5286	0.0115	98
VII	1.5219	0.0111	98
				VIII	1.5263	0.0110	98
IX	1.5341	0.0141	98

C. the manufacturing of optical element

The moulding of (1) the 2nd parts

To live in the model low-melting glass P-SK60 (n of field optical glass (strain) system with the glass model method _d=1.59087, n _F-n _C=0.00948) moulding with the grille-like transfer printing from the teeth outwards, is made the 2nd parts 12 that Fig. 1 (a) is made.Under 440 ℃ of forming temperatures, carry out moulding, in the heating process ambiance is made vacuum.In addition, on stainless steel base material, carry out Ni-P and electroplate, the cut electrodeposited coating, the counter-rotating shape of formation Fig. 1 has been made mould.It is the cutter of 2 μ m that bite uses front end curvature.Among Fig. 1 (a), external diameter is that the height of 60mm, grid is that the spacing of 12.5 μ m, grid is set at about 2mm, is set at about 120 μ m at periphery near the center, and it is more little to arrive peripheral spacing more.

The moulding of (2) the 1st parts

The 1-hydroxycyclohexylphenylketone that adds 1 weight % in the 1st resin precursor composition stirs fully as Photoepolymerizationinitiater initiater.The resin precursor composition that obtains is dripped to the grid forming surface of above-mentioned the 2nd parts that formed grid, from top near mould, potting resin between mould and glass.Then with high-pressure mercury-vapor lamp from the 2nd parts one side irradiation ultraviolet radiation 2 minutes, the demoulding afterwards, moulding the 1st parts 11.Having made the composition surface shown in Fig. 1 (b) like this is the composite optic element 10 of grille-like.

Embodiment 2

At first, the ester ring type olefin resin (Japanese ゼオ Application (strain) system ZEONEX) that will have with the repetitive of following structural formula (34) expression carries out injection moulding, forms the 2nd parts 12 shown in Fig. 2 (a).When moulding, the cylinder temperature is set at 210 ℃, and mold temperature is set at 100 ℃.

Then, with 2 of following structural formula (35) expression, 2, the 2-acrylic acid 5 of 2-trifluoroethyl methacrylate 58 weight % and following structural formula (36) expression, 5 '-[9H-fluorenes-9-pitches base] two [(1,1 '-diphenyl)-2-gathers (oxygen-2,1-ethane two bases) ester 41.5 weight %, and Photoepolymerizationinitiater initiater (チバスペシヤリテイケミカ Le ズ system イ Le ガキユア 184) 0.5 weight % mixing, prepared ultraviolet-curing resin composition.

CH ₂＝C(CH ₃)COOCH ₂CF ₃ …(35)

(in the formula, X is the integer more than or equal to 1.)

This ultraviolet-curing resin composition is dripped to the grid forming surface of the 2nd parts 12, from top near mould, potting resin between mould and the 1st parts, then with high-pressure mercury-vapor lamp from the 2nd parts 12 1 side irradiation ultraviolet radiations 2 minutes, make its curing, the 1st parts 11 shown in Fig. 2 (b) have been made in the demoulding.

Obtained bonding multi-layered type diffraction optical element 10 like this.The external diameter of the element that obtains is 60mm, and the height of grid is that the spacing of 20 μ m, grid is set at about 2mm, is set at about 120 μ m at periphery near the center, and it is more little to arrive peripheral spacing more.The diffraction optical element 10 that utilizes present embodiment to obtain has specific optical characteristics accurately.It is applied in the optics system when making camera, and the camera that obtains can absorb the good image of not spreading and sinking in by using this diffraction optical element complementary color aberration.

In the present embodiment, the refractive index n of the resin that in each grid part, uses _D1, n _D2With mean dispersion MD ₁, MD ₂, and difference n _D1-nd ₂And MD ₁-MD ₂, be shown in Table 3 respectively.

Table 3

Embodiment 3

At first, with dicyclohexyl methyl hydride-4,0.3 mole of 4 '-diisocyanate, 1, two [(2-mercaptoethyl) sulphur]-0.2 mole in 3-sulfydryl propane of 2-and all be that the dibutyl tin laurate of 0.1 weight % mixes with respect to composition have been prepared ester ring type thiocarbamate resin.

With the ester ring type thiocarbamate resin that obtains, be filled in the mother metal 13 that constitutes by optical glass and have grille-like and between the mould that is coated with on this forming surface with release agent, 130 ℃ of heating 2 hours, make its curing, the demoulding afterwards, as shown in Figure 3, on mother metal 23 surfaces, form the 2nd parts 12.

Then, 2-acrylic acid 5 with benzyl methacrylate 49.5 weight % and following structural formula (37) expression, 5 '-{ 4-(1,1 '-xenyl) methylene } two [(1,1 '-diphenyl)-poly-(oxygen-2 of 2-, 1-ethane two bases)] ester 20 weight %, the bisphenol AF dimethylacrylate 30 weight % of following structural formula (38) expression, and Photoepolymerizationinitiater initiater (チバスペシヤリテイケミカ Le ズ system イ Le ガキユア 184) 0.5 weight % mixing, prepared ultraviolet-curing resin composition.

(in the formula, y is the integer more than or equal to 1.)

This ultraviolet-curing resin composition is dripped to the grid forming surface of the 2nd parts 21, from top near mould, potting resin between mould and the 1st parts, then with high-pressure mercury-vapor lamp from the 2nd parts 21 1 side irradiation ultraviolet radiations 2 minutes, make its curing, the 1st parts 22 shown in Fig. 3 (b) have been made in the demoulding.

Obtained bonding multi-layered type diffraction optical element 20 like this.The external diameter of the element that obtains is 60mm, and the height of grid is that the spacing of 12 μ m, grid is set at about 2mm, is set at about 120 μ m at periphery near the center, and it is more little to arrive peripheral spacing more.Diffraction optical element 20 precision of utilizing present embodiment to obtain have specific optical characteristics well.It is applied in the optics system when making camera, and the camera that obtains can absorb the good image of not spreading and sinking in by using this diffraction optical element complementary color aberration.

In the present embodiment, the refractive index n of the resin that uses in each grid part _D1, n _D2With mean dispersion MD ₁, MD ₂, and difference n _D1-n _D2And MD ₁-MD ₂, be shown in Table 3 respectively.The possibility of utilizing on the industry

As mentioned above, the present invention can make the optical element with good optical characteristics, particularly can be cheap and easily make bonding multi-layered type diffraction optical element.

Claims

1. a bonding multi-layered type diffraction optical element has the 2nd parts and fluid-tight engagement the 1st parts on the 2nd parts, and described the 1st parts are made of resin, not only contain phenyl ring but also contain fluorine atom in repetitive,

Wherein, the d line refractive index n of described the 2nd parts _D1D line refractive index n than described the 1st parts _D2Greatly,

The mean dispersion MD of described the 2nd parts ₁Mean dispersion MD than described the 1st parts ₂Little, the mean dispersion MD of wherein said the 2nd parts ₁It is F line refractive index n from the 2nd parts _F1Deduct the C line refractive index n of the 2nd parts _C1Poor, the mean dispersion MD of described the 1st parts ₂It is F line refractive index n from the 1st parts _F2Deduct the C line refractive index n of the 1st parts _C2Poor,

The resin of described the 2nd parts has alicyclic structure in repetitive.

2. optical element as claimed in claim 1, wherein said the 2nd parts comprise ester ring type olefin resin, ester ring type acryl resin, ester ring type urethane resin, have the resin of episulfide structure and have any at least in the Epocryl of alicyclic structure.

3. optical element as claimed in claim 1 is characterized in that, described the 1st parts do not contain any one in sulphur atom, chlorine atom, bromine atoms and the iodine atom in molecule.

4. optical element as claimed in claim 3 is characterized in that, described the 1st parts are ultraviolet curing resin.

5. optical element as claimed in claim 2, the d line refractive index n of wherein said the 2nd parts _D1For more than or equal to 1.45, the mean dispersion MD of described the 2nd parts ₁For smaller or equal to 0.02.

6. optical element as claimed in claim 1 is characterized in that, the d line refractive index n of described the 1st parts _D2For smaller or equal to 1.60, the mean dispersion MD of described the 1st parts ₂For more than or equal to 0.01.

7. optical element as claimed in claim 5 is wherein from the d line refractive index n of described the 2nd parts _D1Deduct the d line refractive index n of described the 1st parts _D2The difference of trying to achieve is more than or equal to 0.03, from the mean dispersion MD of described the 2nd parts ₁Deduct the mean dispersion MD of described the 1st parts ₂The difference of trying to achieve is smaller or equal to-0.003.

8. optical element as claimed in claim 3, wherein said the 1st parts are by constituting the refractive index n of the d line after this resin precursor composition solidifies by making resin precursor composition solidify the optical resin that obtains _d＜1.55 and solidify after mean dispersion MD＞0.010,

Wherein, described resin precursor composition is as follows:

By refractive index n to major general's d line under its uncured state _d＜1.50 and the 1st resin precursor of 0.003＜mean dispersion MD and the refractive index n of d line under its uncured state _d＜1.62 and the 2nd resin precursor of 0.010＜mean dispersion MD mix and obtain,

Wherein, described the 1st resin precursor is the compound by following general formula (3)～(9) any one expression,

Wherein, R ¹, R ³, R ⁵, R ⁷,

R ¹²And R ¹⁷Be respectively hydrogen or methyl; R ²And R ⁶Be respectively with C _M2H _N2O _P2N _Q2F _R21 valency organic group of expression, wherein, m2 is the integer more than or equal to 1, and p2 and q2 are respectively 0 or more than or equal to 1 integer, n2 is the integer more than or equal to 1, and r2 is 0 or smaller or equal to ((n2+5) * 2) and more than or equal to 1 integer; R ⁴And R ⁸Be respectively with C _M2H _N2O _P2N _Q2F _R2The divalent organic group of expression, wherein, m2 is the integer more than or equal to 1, and p2 and q2 are respectively 0 or more than or equal to 1 integer, n2 is the integer more than or equal to 1, and r2 is 0 or smaller or equal to ((n2+5) * 2) and more than or equal to 1 integer; R ¹³For being selected from-OCH ₂CH (OH) CH ₂-,-(C ₂H ₄O) _J1-,-(C ₃H ₆O) _J1-,-(C ₅H ₁₂COO) _J1-in any organic group, wherein, j1 is the integer more than or equal to 1; R ¹⁴And R ¹⁶Be respectively and be selected from-CH ₂OC ₂CH (OH) CH ₂-) ,-CH ₂(C ₂H ₄O) _J1-,-CH ₂(C ₃H ₆O) _J1-in any organic group, wherein, j1 is the integer more than or equal to 1; R ⁹～R ¹¹Be respectively CH ₂CH ₂OCOCH=CH ₂Or CH ₂CH ₂OCOC (CH ₃)=CH ₂R ¹⁵Be hydrogen atom or ethyl; R ¹⁸For-CH ₂OH or ethyl; R ¹⁹For-CH ₂OCOCH=CH) or ethyl, a, d and f are respectively more than or equal to 2 and smaller or equal to 4 number, b, e and g are respectively the number more than or equal to 1,

Described the 2nd resin precursor is the compound of following general formula (10)～(12) any one expression,

Wherein, R ²⁰And R ²²Be respectively hydrogen atom or methyl, R ²¹For being selected from-(OCH ₂CH ₂) _K1-,-(OCH ₂CH ₂CH ₂) _K1-,-(OCH ₂CH ₂) _K1-(OCH ₂CH ₂CH ₂) _K2In any organic group, wherein, k1 and k2 are integer; R ²³For being selected from-(OCH ₂CH ₂) _K2-,-(OCH ₂CH ₂CH ₂) _K2-,-(OCH ₂CH ₂) _K3-(OCH ₂CH ₂CH ₂) _K4In any organic group, wherein, k2～k4 is an integer; Z ¹For containing the divalent organic group of benzene ring structure, Z ²For containing 3 valency organic groups of benzene ring structure, h and i are respectively integer.

9. optical element as claimed in claim 6 is characterized in that, from the d line refractive index n of described the 2nd parts _D1Deduct the d line refractive index n of described the 1st parts _D2And the difference of trying to achieve is more than or equal to 0.03,

Mean dispersion MD from described the 2nd parts ₁Deduct the mean dispersion MD of described the 1st parts ₂And the difference of trying to achieve is smaller or equal to-0.003.

10. a bonding multi-layered type diffraction optical element has the 2nd parts and fluid-tight engagement the 1st parts on the 2nd parts, and described the 1st parts are made of resin,

The resin of described the 1st parts not only contains phenyl ring but also contain fluorine atom in repetitive.

11. optical element as claimed in claim 10 is characterized in that, described the 1st parts do not contain any one of sulphur atom, chlorine atom, bromine atoms and iodine atom in molecule.

12. optical element as claimed in claim 11 is characterized in that, described the 1st parts are ultraviolet curing resin.

13. optical element as claimed in claim 10 is characterized in that, the d line refractive index n of described the 1st parts _D2For smaller or equal to 1.60, the mean dispersion MD of described the 1st parts ₂For more than or equal to 0.01.

14. optical element as claimed in claim 13 is characterized in that, from the d line refractive index n of described the 2nd parts _D1Deduct the d line refractive index n of described the 1st parts _D2And the difference of trying to achieve is more than or equal to 0.03,

15. optical element as claimed in claim 11, wherein said the 1st parts are by constituting the refractive index n of the d line after this resin precursor composition solidifies by making resin precursor composition solidify the optical resin that obtains _d＜1.55 and solidify after mean dispersion MD＞0.010,

Wherein, described resin precursor composition is as follows:

Wherein, R ¹, R ³, R ⁵, R ⁷, R ¹²And R ¹⁷Be respectively hydrogen or methyl; R ²And R ⁶Be respectively with C _M2H _N2O _P2N _Q2F _R21 valency organic group of expression, wherein, m2 is the integer more than or equal to 1, and p2 and q2 are respectively 0 or more than or equal to 1 integer, n2 is the integer more than or equal to 1, and r2 is 0 or smaller or equal to ((n2+5) * 2) and more than or equal to 1 integer; R ⁴And R ⁸Be respectively with C _M2H _N2O _P2N _Q2F _R2The divalent organic group of expression, wherein, m2 is the integer more than or equal to 1, and p2 and q2 are respectively 0 or more than or equal to 1 integer, n2 is the integer more than or equal to 1, and r2 is 0 or smaller or equal to ((n2+5) * 2) and more than or equal to 1 integer; R ¹³For being selected from-OCH ₂CH (OH) CH ₂-,-(C ₂H ₄O) _J1-,-(C ₃H ₆O) _J1-,-(C ₅H ₁₂COO) _J1-in any organic group, wherein, j1 is the integer more than or equal to 1; R ¹⁴And R ¹⁶Be respectively and be selected from-CH ₂OC ₂CH (OH) CH ₂-) ,-CH ₂(C ₂H ₄O) _J1-,-CH ₂(C ₃H ₆O) _J1-in any organic group, wherein, j1 is the integer more than or equal to 1; R ⁹～R ¹¹Be respectively CH ₂CH ₂OCOCH=CH ₂Or CH ₂CH ₂OCOC (CH ₃)=CH ₂R ¹⁵Be hydrogen atom or ethyl; R ¹⁸For-CH ₂OH or ethyl; R ¹⁹For-CH ₂OCOCH=CH) or ethyl, a, d and f are respectively more than or equal to 2 and smaller or equal to 4 number, b, e and g are respectively the number more than or equal to 1,

16. an optical article, it has the described optical element of claim 8.

17. an optical article, it has the described optical element of claim 15.

18. the manufacture method of a bonding multi-layered type diffraction optical element, described bonding multi-layered type diffraction optical element has the 2nd parts and 1st parts of fluid-tight engagement on the 2nd parts, described the 1st parts are made of resin, and described the 1st parts not only contain phenyl ring but also contain fluorine atom in repetitive

This method comprises that the precursor composition that makes described the 2nd parts is shaped, and solidifies, and forms the operation of described the 2nd parts,

Described the 2nd parts have alicyclic structure in repetitive,

The d line refractive index n of described the 2nd parts _D1D line refractive index n than described the 1st parts _D2Greatly,

The mean dispersion MD of described the 2nd parts ₁Mean dispersion MD than described the 1st parts ₂Little, the mean dispersion MD of wherein said the 2nd parts ₁It is F line refractive index n from the 2nd parts _F1Deduct the C line refractive index n of the 2nd parts _C1Poor, the mean dispersion MD of described the 1st parts ₂It is F line refractive index n from the 1st parts _F2Deduct the C line refractive index n of the 1st parts _C2Poor.

19. the manufacture method of a bonding multi-layered type diffraction optical element, described bonding multi-layered type diffraction optical element have the 2nd parts and 1st parts of fluid-tight engagement on the 2nd parts, described the 1st parts are made of resin,

This method comprises that the precursor composition that makes described the 1st parts is shaped, and solidifies, and forms the operation of above-mentioned the 1st parts,

Described the 1st parts not only have phenyl ring but also have fluorine atom in repetitive,

The d line refractive index n of described the 1st parts _D2D line refractive index n than described the 2nd parts _D1It is little,

The mean dispersion MD of described the 1st parts ₂Mean dispersion MD than described the 2nd parts ₁Greatly, the mean dispersion MD of wherein said the 2nd parts ₁It is F line refractive index n from the 2nd parts _F1Deduct the C line refractive index n of the 2nd parts _C1Poor, the mean dispersion MD of described the 1st parts ₂It is F line refractive index n from the 1st parts _F2Deduct the C line refractive index n of the 1st parts _C2Poor.