JPH0411201A - Photoconducting lens array - Google Patents

Abstract

PURPOSE:To decrease the double refraction and to improve the durability, heat resistance, moisture proof, size accuracy, etc., by forming the photoconducting lens array of a specific cyclic olefin random copolymer or cyclic olefin open ring polymer. CONSTITUTION:Plural photoconducting lens systems 7 which have object-side lens parts 2 where light is made incident, image-side lens parts 3, 1st reflecting surfaces 4 which reflect the light totally, roof surfaces 5 which invert images formed with reflected light, and 2nd reflecting surfaces 6 which guide reflected light from the roof surfaces 5 to the image-side lens parts are arrayed. Each photoconducting lens system is formed of the cyclic olefin random copolyer which has 0.05 - 10 dl/g limit viscosity measured in decalin of 135 deg.C and consists of a copolymer of cyclic olefin and ethylene shown by a formula I, or the open ring polymer of cyclic olefin. In the formula I, (n) is 0 or 1, (m) is 0 or a positive integer, and R<1> - R<18> are atoms or radicals selected in a group of a hydrogen atom, a halogen atom, and a hydrocarbon radical. Consequently, the double refraction is made small and the durability, heat resistance, moisture proof, size accuracy, etc., are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light guiding lens array formed from a specific cyclic olefin copolymer, a ring-opening polymer of a cyclic olefin, or a hydrogenated product thereof.

[Conventional technology]

In recording devices such as LED recording devices and liquid crystal recording devices, and image information processing devices such as facsimile machines and copying machines, light guide lens arrays for forming erect, equal-magnification real images are used for image reading or image formation. There is.

For example, in an LED recording device or a liquid crystal recording device.

A light guide lens array is used to guide light emitted by an LED array, liquid crystal, or the like onto a photoreceptor drum. In addition, document reading devices used in facsimiles, etc.
A light guiding lens array is used to guide reflected light from a document to an image sensor. Furthermore, in exposure-type copying machines, in order to guide the reflected light from the original onto the photoreceptor drum,
A light guiding lens array is used.

Such a light guide lens array includes a pair of first lens surfaces facing the object side and image side with a common optical axis, and separate optical axes in a direction perpendicular to the optical axis of the first lens surfaces. A lens element in which a plurality of lens elements are arranged, each consisting of a pair of second lens surfaces having Two types of Porro prism lenses, each consisting of two types of Porro prisms and an upper curved surface and a lower curved surface respectively provided on the upper entrance surface and lower exit surface of these Porro prisms, are opposed to each other and continuously combined. (Japanese Unexamined Patent Publication No. 58-86515), a plurality of light guiding lens systems arranged including an object-side lens section, a first reflecting surface, a roof surface, a second reflecting surface, and an image-side lens section (JP-A No. 58-86515); No. 61-210319, No. 62-96924, No. 63
-75723).

These light guide lens arrays are formed from plastic materials such as polymethyl methacrylate, polycarbonate, polystyrene, poly4-methyl-1-pentene, acrylic, and the like.

However, light guide lens arrays made from polymethyl methacrylate have low durability, heat resistance, and moisture resistance, those made from polycarbonate have high birefringence and low moisture resistance, and those made from polystyrene have low moisture resistance. Problems include high birefringence and low heat resistance. Furthermore, when poly-4-methyl-1-pentene is used as a material for the light guiding lens array, there is a problem that precision molding is difficult because poly-4-methyl-1-pentene has large molding shrinkage.

[Problem to be solved by the invention]

The purpose of the present invention is to solve the above problems,
It is an object of the present invention to provide a light guide lens array with low birefringence and excellent durability, heat resistance, moisture resistance, dimensional accuracy, etc.

[Means to solve the problem]

The present invention is the following light guiding lens array.

(1) An object-side lens section into which light is incident, an image-side lens section through which light is emitted, a first reflecting surface that totally reflects the incident light entering from the object-side lens section, and reflection from this first reflecting surface. A light guide in which a plurality of light guide lens systems are arranged, each having a roof surface that inverts an image caused by reflected light, and a second reflecting surface that totally reflects the reflected light reflected from the roof surface and guides it to the image side lens part. In the optical lens array, the intrinsic viscosity [η] measured in decalin at 135°C is 0.05 to 10 dR/g (a) consisting of a copolymer of cyclic olefin and ethylene represented by the following general formula El) A light guide lens characterized in that the light guide lens system is formed of a cyclic olefin random copolymer, or (b) a ring-opening polymer of a cyclic olefin represented by the following general formula [I], or a hydrogenated product thereof. array.

(In the formula, n is O or 1, m is O or a positive integer, R1
5R11l each independently represents an atom or group selected from the group consisting of a hydrogen atom, a halogen atom, and a hydrocarbon group, and R15 to R11 may be bonded to each other to form a monocyclic or polycyclic ring; Rts and RIG or R17 and R1I' may form a divalent hydrocarbon group. The monocyclic or polycyclic ring formed by R15 to R11 may have a double bond. (2) The light guiding lens array according to (1) above, wherein the object side lens section and the image side lens section are arranged at positions where the optical axis of the object side lens section and the optical axis of the image side lens section coincide.

(3) The light guiding lens array according to (1) above, wherein the object side lens section and the image side lens section are arranged at positions where the optical axis of the object side lens section and the optical axis of the image side lens section are shifted.

The light guiding lens array of the present invention includes an object-side lens section into which light from an object is incident, an image-side lens section through which light is emitted, a first reflecting surface which totally reflects the incident light, a roof surface which inverts the reflected light, A plurality of light guide lens systems each including a second reflecting surface that totally reflects the reflected light are arranged in parallel.

Convex lenses are used as the object-side lens section and the image-side lens section, respectively. The object side lens section and the image side lens section may be arranged so that their respective optical axes coincide,
Further, the optical axes may be shifted from each other.

In such a light guide lens array, light from an object that enters from the object-side lens portion is totally reflected on the first reflecting surface and guided to the roof surface, and the image is inverted on the roof surface.

The light is further guided to the second reflecting surface, where it is totally reflected, and then exits from the image-side lens section to form an erect, equal-magnification real image. The real image to be formed does not necessarily have to be a life-sized image of the Royal Family.
It is also possible to reduce or enlarge by changing the magnification of the light guiding lens system.

The light guide lens array of the present invention is produced by integrally molding the cyclic olefin random copolymer (a) or the ring-opening polymer of cyclic olefin or its hydrogenated product (b) by injection molding or the like as a molding material. However, it is also possible to separately mold each lens portion, reflective surface, etc., or the light guide lens system, and then assemble them to form a light guide lens array.

The cyclic olefin which is a component of the cyclic olefin random copolymer (a) used in the light guiding lens array of the present invention is selected from the group consisting of unsaturated monomers represented by the general formula [1] above. at least one type of cyclic olefin.

In the cyclic olefin random copolymer (a), the cyclic olefin represented by the general formula El) mainly forms repeating units having a structure represented by the following general formula (1-a).

...(1-al (wherein m, n and R1-R11 are the same as in the above general formula)) R1-R18 in the above general formula (1) each independently represent a hydrogen atom, a halogen atom and a hydrocarbon group. Specific examples of R1 to R14 include halogen atoms such as fluorine, chlorine, and bromine; methyl group, ethyl group, propyl group, butyl group, etc. Examples include lower alkyl groups, which may be different from each other, may be partially different, or may be entirely the same.

Specific examples of R15 to R11 include halogen atoms such as fluorine, chlorine, and bromine; methyl groups, engineered methyl groups,
Alkyl groups such as propyl group, isopropyl group, butyl group, isobutyl group, hexyl group, stearyl group; cycloalkyl group such as cyclohexyl group; phenyl group, tolyl group, ethylphenyl group, isopropylphenyl group, naphthyl group, anthryl group, etc. Examples include substituted or unsubstituted aromatic hydrocarbon groups; benzyl groups, phenethyl groups, and aralkyl groups in which other alkyl groups are substituted with aryl groups, and these may be different from each other, but all may be the same. There may be. Further, R1'' to HLS may mutually form a ring, or Rlg and RIG or H17 and Rle may form a divalent hydrocarbon group.

The ring formed from H1s to R1@ may be monocyclic or polycyclic, may be a polycyclic ring having a bridge, may be a ring having a double bond, or a combination of these rings. It may be a ring consisting of As a divalent hydrocarbon group,
Examples include alkylidene groups such as ethylidene, propylidene, and isopropylidene groups.

The cyclic olefin represented by the general formula [I] can be easily produced by condensing a cyclopentadiene and a corresponding olefin or cyclic olefin by a Diels-Alder reaction.

Examples of the cyclic olefin represented by the general formula [I] include bicyclo[2,2,1)hept-2-ene or its derivatives, tetracyclo(4,4,0,1''.51
7.10) -3-dodecene or its derivative, hexadi) yo (6,6,1,1ff +6.1111 +
13.02 +7.09 +14) -4-heptadecene or its derivative, octacyclo[8°8.0.12
・9.14・7.11L・1J13・1J3・M, O1
2.17)-s-tocosene or its derivative, pentacyclo(6,6,1°1316.02.1.09.14)
-4-hexadecene or its derivative, pentacyclo(
6,5,1,1'・6.02・−,+9,13)−4−
Pentadecene or its derivatives, heptacyclo[8゜7
．． 0.12・9.14・7.111・14.03・8.
012+ig]-5-eicosene or its derivative, heptacyclo(8,8,0,12='14・7.111・
1@, 03・1.012・17)-s-heneicosene or its derivatives, tricyclo(4,3,0,1” +
5) -3-decene or its derivative, tricyclo(4
, 4,0,1"·5]-3-undecene or its derivatives, pentacyclo[6,5,1,13", 02·7. +
9,1)) -4,to-pentadecadiene or its derivative, pentacyclo(4,7,0,12"0" x2
1g・+2) -3-pentadecene or its derivative,
Heptacyclo(7,8,0,13・s,+2,7.tx
o・17. Qll.16112, LS)-4-eicosene or its derivatives, nonacyclo(9,lO, b14,
7. ol, +1. Q2. LD, ol2, 21.1!3.
20014.19.115.″1]-5-bentacocene or its derivatives can be mentioned.

Further, as the cyclic olefin represented by the general formula [I], a compound represented by the following general formula (II) (wherein,
p is O or an integer of 1 or more, q and r are Oll or 2, R7-R111 and RAG to RL8 are the same as in the general formula (1), and R19 to R27 each independently represent a hydrogen atom, a halogen atom, Indicates an atom or group selected from the group consisting of an aliphatic hydrocarbon group, an aromatic hydrocarbon group, and an alkoxy group, and RL S~R11l and R19~
R27 may be bonded directly or via an alkylene group having 1 to 3 carbon atoms to form a ring. ) Specific examples of R19 to R27 in the general formula (n) include a hydrogen atom; a halogen atom such as fluorine, chlorine, and bromine; a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, and an isobutyl group. , aliphatic hydrocarbon groups such as hexyl group and stearyl group; cycloalkyl groups such as cyclohexyl group; substituted or unsubstituted aromatic groups such as phenyl group, tolyl group, ethylphenyl group, isopropylphenyl group, naphthyl group, anthryl group, etc. Hydrocarbon groups; aralkyl groups such as benzyl groups and phenethyl groups; alkoxy groups such as methoxy groups, ethoxy groups, and propoxy groups; these may be different or partially different. , may all be the same.

In the compound represented by the general formula [In, p is O
-3 are preferred.

Specific examples of the compound represented by the general formula [■] include those listed in Table 1.

Table 1 (continued 1) ■ (continued 2) Table 1 (continued 3) Table 1 (continued 5) Table 1 (continued 4) Table 1 (continued 6) Table 1 (continued 7) Table 1 (continued 9) Table 1 ( Continued 8) Table 1 (Continued 10) Table 1 (Continued 11) Table 1 (Continued 13) Table (Continued 12) Table 1 (Continued 14) The cyclic olefin random copolymer (a) is composed of the cyclic olefin component and ethylene. However, in addition to these two essential components, other copolymerizable unsaturated monomer components may be contained as necessary to the extent that the object of the present invention is not impaired. It's okay. Examples of unsaturated monomers that may optionally be copolymerized include those having 3 carbon atoms,
-20 α-olefins, hydrocarbon monomers containing two or more carbon-carbon double bonds in one molecule, and the like. As an α-olefin having 3 to 20 carbon atoms,
Specifically, propylene, 1-butene, 1-pentene, 4
-methyl-1-pentene, 3-methyl-1-pentene,
1-hexene, 1-heptene, octene, 1-nonene.

Examples include 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicosene. Examples of hydrocarbon monomers containing two or more carbon-carbon double bonds in one molecule include 1,4-hexadiene, 1,6-octadiene, and 2-methyl-1,5-hexadiene. , 4-methyl-1,5-hexadiene, 5-methyl-1,5-hexadiene, 6-
Methyl-1,5-hebutadiene, 7-methyl-1,6-
Chain nonconjugated diene such as octadiene; cyclohexadiene, dicyclopentadiene, methyltetrahydroindene, 5-vinyl-2-norbornene, 5-ethylidene 2
-norbornene, 5-methylene-2-norbornene, 5
-isopropylidene-2-norbornene, 6-chloromethyl-5-isopropenyl-2-norbornene, 4,9
゜5.8-dimethano-3a, 4, 4a *5
,8,8a,9,9a-octahydro-IH-
Cyclic non-conjugated diene such as benzoindene; 2゜3-diisopropylidene-5-norbornene; 2-ethylidene-3
-Impropylidene-5-norbornene; 2propenyl-2,2-norbornadiene, etc. can be exemplified. Among these, 1,4-hexadiene, 1,6
-octadiene, and cyclic nonconjugated dienes, especially dicyclopentadiene, 5-ethylidene-2-norbornene, 5-vinyl-2-norbornene, 5-methylene-2
-norbornene, 1,4-hexadiene, and 1,6-octadiene are preferred.

In the cyclic olefin random copolymer (a), the structural units derived from the ethylene component range from 40 to 85 mol%, preferably from 50 to 75 mol%, and the structural units derived from the cyclic olefin component range from 15 to 60 mol%. , preferably 2
A range of 5 to 50 mol % is appropriate, and the structural units derived from the ethylene component and the structural units derived from the cyclic olefin component form a substantially linear cyclic olefin random copolymer arranged randomly. The fact that the cyclic olefin random copolymer (a) is substantially linear and does not have a gel-like crosslinked structure means that this copolymer has 1
This can be confirmed by complete dissolution in decalin at 35°C.

The intrinsic viscosity [η] of the cyclic olefin random copolymer (a) measured in decalin at 135°C is 0.05 to 10.
dQ/g, preferably in the range of 0.08 to 5 dQ/g.

Further, the cyclic olefin random copolymer (a) has a softening temperature (TMA) of 70°C or higher, preferably 90 to 25°C, as measured by a thermal mechanical analyzer.
0°C, more preferably 100 to 200°C, iodine value (g-iodine/100g copolymer) 30 or less, preferably 25 or less, glass transition temperature (Tg) usually 50 to 2
30°C, preferably 70-210°C, crystallinity measured by X-ray diffraction method is 0-10%, preferably 0-7%
, particularly preferably in the range of 0 to 5%.

As the cyclic olefin random copolymer (,), one type of copolymer having physical properties within the above range may be used, but the intrinsic viscosity measured in decalin at 135°C [
η] is in the range of 0.05 to 10 dQ/g, and the softening temperature (TMA) is 70°C or higher, preferably 90 to 250
The intrinsic viscosity [η] measured in decalin at 135°C is added to 100 parts by weight of a cyclic olefin random copolymer at 135°C.
is 0. O is in the range of 1 to 5 dQ/g, and the softening temperature (
It is also possible to use a composition blended with 0.1 to IO parts by weight of a cyclic olefin random copolymer having a TMA) of less than 70°C, preferably -10 to 60°C.

The cyclic olefin random copolymer (a) comprises an ethylene component, a cyclic olefin component represented by the general formula [1], and other monomer components to be copolymerized if necessary.
It can be produced by polymerization in the presence of a well-known Ziegler catalyst.

Examples of the Ziegler-based catalyst include (a) a catalyst consisting of a composite containing at least magnesium, titanium, and a halogen and an organoaluminum compound, and (b) a catalyst consisting of a vanadium compound and an organoaluminum compound. . Among these, the latter catalyst (a) is preferred, and a catalyst comprising a soluble vanadium compound and an organoaluminum compound is particularly preferred.

A specific method for producing the cyclic olefin random copolymer (a) is described in JP-A-60-168708 and JP-A-6
1-120816, JP-A-61-115912, JP-A-61-115916, JP-A-61-
271308, JP 61-272216, JP 62-252406, JP 62-25
It is disclosed in Publication No. 2407 and the like.

In the present invention, the above cyclic olefin random copolymer (
In place of a), a ring-opening polymer of a cyclic olefin component represented by the above general formula [I] or a hydrogenated product thereof (hereinafter,
(referred to as a cyclic olefin ring-opening polymer) (b) may also be used.

The cyclic olefin constituting the cyclic olefin-based ring-opening polymer (b) is at least one cyclic olefin selected from the group consisting of unsaturated monomers represented by the above general formula [I].

In the ring-opening polymer before hydrogenation of the hydrogenated cyclic olefin-based ring-opening polymer, the cyclic olefin component represented by the general formula [I] is represented by the following general formula (1-b).
In the ring-opened polymer after hydrogenation, repeating units of the following general formula (I-
It mainly forms repeating units having the structure represented by c).

...(1-b) ...(I-c) (wherein m, n and R1 to R1s are the general formula (1)
is the same as ) The cyclic olefin-based ring-opening polymer (b) has the above-mentioned cyclic olefin as an essential component, but other copolymerizable unsaturated monomers may be added as necessary to the extent that the object of the present invention is not impaired. It may also contain body components. Examples of unsaturated monomers that may optionally be copolymerized include 1, for example, the following general formula (
Examples include cyclic olefins represented by m).

(In the formula, R2+1.829 is a hydrogen atom, a hydrocarbon group, or a halogen atom, and each may be the same or different. Q is an integer of 2 or more, and when R21R29 is repeated multiple times, (These may be the same or different.) Examples of the monomer components represented by the general formula (III) include cyclobutene, cyclopentene, cycloheptene, cyclooctene, cyclononene, cyclodecene, methylcyclopentene, methylcycloheptene, methylcyclo octene, methylcyclononene, methylcyclodecene, ethylcyclopentene,
Examples include ethylcyclobutene, ethylcyclooctene, dimethylcyclopentene, dimethylcycloheptene, dimethylcyclooctene, and trimethylcyclodecene.

The intrinsic viscosity [η] of the cyclic olefin ring-opening polymer (b) measured in decalin at 135°C is 0.05 to 10 dQ/
g, preferably 0.08 to 5 d (1/g).

Furthermore, the cyclic olefin ring-opening polymer (b) has a softening temperature (TM^) of 70°C or higher, preferably 90 to 20°C.
It is preferable that the iodine value is 0 to 200, preferably 0 to 60 at 0°C.

As the cyclic olefin ring-opening polymer (b), a polymer consisting only of those having physical properties within the above range may be used, but a polymer having physical properties outside the above range may be partially included. In this case, it is sufficient that the entire physical property value is within the above range.

In order to produce the ring-opening polymer of the cyclic olefin component represented by the above general formula [I], the monomer component selected from the above general formula (1) is used as a raw material, and the ring-opening polymer is subjected to ring-opening polymerization using a conventional ring-opening polymerization method for cyclic olefins. Can be polymerized. In this case, examples of the polymerization catalyst include ruthenium, rhodium,
A system consisting of a halide such as palladium, osmium, iridium, platinum, molybdenum, tungsten, nitrate or acetylacetone compound and a reducing agent such as an organic tin compound or alcohol, or a halide such as titanium, vanadium, zirconium, tungsten, molybdenum or acetylacetone A system consisting of a compound and an organic aluminum or the like can be used.

The molecular size of the ring-opening polymer to be produced can be adjusted by adding an olefin or the like during ring-opening polymerization.

When hydrogenating the ring-opened polymer obtained above, a conventional hydrogenation method can be used.

As the hydrogenation catalyst, those used in the hydrogenation of olefin compounds can generally be used. Specifically, the heterogeneous catalysts include nickel, palladium,
Solid catalysts include platinum, or these metals supported on carriers such as carbon, silica, diatomaceous earth, alumina, titanium oxide, etc. For example, nickel/silica, nickel/diatomaceous earth, palladium/carbon, palladium/silica, Examples include palladium/diatomaceous earth and palladium/alumina. Also, as a homogeneous catalyst.

There are products based on metals from group Ⅰ of the periodic table, such as N1, C, such as nickel naphthenate/triethylaluminum, cobalt octenoate/n-butyllithium, nickel acetylacetonate/triethylaluminum, etc.
Examples thereof include organic metal compounds of metals from groups 1 to 2 of the periodic table, Rh compounds, and the like.

The hydrogenation of the ring-opened polymer is uniform depending on the type of catalyst.
It is carried out in a system or a heterogeneous system under a hydrogen pressure of 1 to 150 atmospheres and at a temperature range of 0 to 180°C, preferably 20 to 100°C. The hydrogenation rate can be adjusted by hydrogen pressure, reaction temperature, reaction time, catalyst concentration, etc.

The light guide lens array of the present invention can be produced by integrally molding the cyclic olefin random copolymer (a) or the cyclic olefin ring-opening polymer (b) as a molding material by a molding method such as Yaro molding. can be manufactured.

The light guide lens array of the present invention is a lens array for forming an erect, same-magnification real image for image reading or image formation in a recording device such as an LED recording device or a liquid crystal recording device, or an image information processing device such as a facsimile machine or a copying machine. Can be used as

[For production]

In the light guide lens array of the present invention, the incident light that enters from the object side lens portion is totally reflected by the first reflecting surface and guided to the roof surface, and the image is inverted on the roof surface.

The light is further guided to the second reflecting surface, where it is totally reflected, and then exits from the image side lens section to form a real image.

By forming such a light guide lens array from the cyclic olefin-based random copolymer (a) or the cyclic olefin-based ring-opening polymer (b), it has low birefringence, durability, heat resistance, moisture resistance, Products with excellent dimensional accuracy can be obtained.

〔Example〕

Next, the present invention will be explained with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view showing a light guiding lens array according to an embodiment;
FIG. 2(a) is a plan view of the light guide lens array in FIG.
b) is a front view, and (c) is a side view. In the figure, 1
is a light guide lens array, and the object side lens part 2 that enters light
, an image-side lens part 3 that emits light, a first reflecting surface 4 that totally reflects the incident light, a roof surface 5 that inverts the reflected light, and a second reflecting surface 6 that totally reflects the reflected light. A plurality of light guiding lens systems 7 are arranged in parallel. The object side lens section 2 and the image side lens section 3 are convex lenses,
The object-side lens section 2 and the image-side lens section 3 are arranged so that their respective optical axes coincide. The roof surface 5 forms a substantially right angle, and the first reflective surface 4 and the second reflective surface 6 have an inclination angle α that allows total reflection of the incident light incident from the object-side lens portion 2 and the reflected light from the roof surface 5. have.

In such a light guiding lens array 1, the light from the object 8 that enters from the object side lens section 2 is totally reflected by the first reflecting surface 4 and guided to the roof surface 5, and the image is inverted on the roof surface 5. death,
The light is further guided to the second reflecting surface 6, where it is totally reflected, and then exits from the image side lens section 3 to form an erect real image 9 of equal size. The real image 9 to be formed does not necessarily have to be an erect, equal-sized image, and can be reduced or enlarged by changing the magnification of the light guiding lens system 7.

Such a light guide lens array 1 is preferably integrally molded by injection molding or the like using the cyclic olefin random copolymer (a) or the cyclic olefin ring-opening polymer (b) as a molding material. The light guide lens array 1 can also be formed by separately molding each lens portion 2.3, the reflecting surface 4.6, etc., or the light guide lens system 7 and attaching them to a machine.

3 and 4 are plan views of light guide lens arrays of different embodiments, respectively. The object-side lens section 2 and the image-side lens section 3 of the light guiding lens array 1 shown in FIG. 1 are arranged so that adjacent lenses are in contact with each other, that is, the diameter of the lens and the arrangement interval between the lenses are the same. In FIG. 3, the distance between the adjacent lens parts 2.3 is 10, that is, the arrangement interval of the lens parts 2.3 is set so that the distance between the adjacent lens parts 2.3 is 10.
They are arranged so that the diameter is larger than 3. In such a light guiding lens array 1, since optical interference between adjacent lenses is prevented, a good real image 9 can be obtained. Further, in FIG. 4, adjacent lens portions 2.3 are arranged so as to overlap, that is, the distance between the lens portions 2.3 is smaller than the diameter of the lens portions 2.3. In such a light guiding lens array 1, it is possible to reduce light scattering unevenness.

FIG. 5(a) is a plan view of a light guiding lens array according to yet another embodiment, FIG. 5(b) is a front view, and FIG. 5(C) is a side view.

In this light guiding lens array 1, the object side lens section 2
The image-side lens section 3 is arranged such that their optical axes are shifted from each other, and the roof surface 5 is provided at a central position between the optical axes of the object-side lens section 2 and the image-side lens section 3. In such a light guide lens array 1, most of the light incident from the object-side lens section 2 is reflected at the center of the roof surface 5, and is prevented from passing through the apex portion of the roof surface 5. So,
Even if the manufacturing accuracy of the apex portion of the roof surface 5 is rough, a good real image 9 can be obtained. Furthermore, since optical interference between adjacent light guide lens systems 7 is reduced, a good real image 9 can be obtained.

FIG. 6(a) is a plan view of a light guiding lens array according to yet another embodiment, and FIG. 6(b) is a front view. In this light guide lens array 1, in the central part of the light guide lens system 7 arranged in parallel, an object side lens section 2 and an image side lens section 3 are arranged.
are arranged so that their optical axes coincide with each other, but their optical axes are arranged to be shifted from each other in their outer parts. When such a light guide lens array 1 is used, for example, in an optical reading device, the document 11 located on the object side lens section 2 can be read using the three sensors 12a, 12b, and 12c, so a small sensor is used. 12a, 12b+ 1
2c allows the document 11 to be read continuously. Also, a large original 11 can be read. Although the light guiding lens array 1 shown in FIG. 6 has a combination of an arrangement where the optical axes match and an arrangement where the optical axes are shifted, it is also possible to combine only the arrangement where the optical axes are shifted.

The light guide lens array of the present invention is not limited to that shown in the drawings,
The specific structure can be changed as long as it has the object side and image side lens parts, the first and second reflective surfaces, and the roof surface, and other configurations may be added as necessary.

Next, test examples will be explained.

Test Example 1 Ethylene and tetracyclo(4,4,O.

A copolymerization reaction with TCD-3 (abbreviated as TCD-3 below) was carried out in the following manner. A cyclohexane solution containing TCD-3 was poured from the top of the polymerization vessel until the TCD-3 concentration in the polymerization vessel was 60 g/Q. Similarly, a cyclohexane solution of VO(QC2H5)CQ2 was used as a catalyst, and the vanadium concentration in the polymerization vessel was 0.
．． A cyclohexane solution of ethyl aluminum sesquichloride (AQ(C2H5)2.5CQ, S) was added to each polymerization vessel so that the aluminum concentration in the polymerization vessel was 4.8 mmol/Q. On the other hand, from the bottom of the polymerization vessel, the polymerization liquid in the polymerization vessel is
The sample was extracted continuously so that the average residence time was 0.5 hours. In addition, ethylene is supplied from the top of the polymerization vessel at a rate of 30% per hour.
Q. Hydrogen was supplied at a rate of 0.5 t/hr and nitrogen at a rate of 10 t2/hr. The copolymerization reaction was carried out at 10° C. by circulating a refrigerant through a jacket attached to the outside of the polymerization vessel.

A copolymerization reaction was carried out under the above reaction conditions to obtain a polymerization reaction mixture containing an ethylene/TCD-3 random copolymer. The copolymerization reaction was stopped by adding a small amount of isopropyl alcohol to the polymerization solution drained from the bottom of the polymerization vessel.

Next, the polymerization solution was poured into a household mixer containing about three times as much acetone as the polymerization solution while rotating the mixer to precipitate the produced copolymer. The precipitated copolymer was collected by filtration, dispersed in acetone to a polymer concentration of about 50 g/12, and treated at the boiling point of acetone for about 2 hours. After the treatment, the copolymer was collected by filtration and dried under reduced pressure at 120°C for 24 hours.

The composition ratio of ethylene/TCD-3 in the copolymer measured by C-NMR analysis of the ethylene/TCD-3 random copolymer obtained as above was 60/34 in molar ratio.
The intrinsic viscosity [η] measured in decalin at 135°C is 0.
65 dR/g, softening temperature (TMA) was 150° C., and iodine value was 20.3.

Using the above ethylene/TCD-3 random copolymer, a light guide lens array shown in FIG. 1 was integrally molded by injection molding. A durability test was conducted on the light guide lens array obtained in this way, and the MTF (Mo
duration Transfer Function
n) value was determined. The results are as follows.

Test conditions = 110°C, 100 hours MTF value: Before test: 92% After test: 92% Comparative test example 1 Test example 1 except that commercially available polymethyl methacrylate was used instead of the ethylene/TCD-3 random copolymer. A light guide lens array was obtained in the same manner as in Test Example 1, and the MTF value was determined in the same manner as in Test Example 1. The results are as follows.

Test conditions: Same as Test Example 1 MTF value: Before test: 91% After test: 50% or less Test Example 2 The test was carried out in the same manner as Test Example 1 except that the test conditions of the durability test were changed. The results are as follows.

Test conditions: 60°C, relative humidity 90%, 1000 hours MT
F value: Before test: 92% After test: 92% Comparative Test Example 2 The test was carried out in the same manner as Comparative Test Example 1 except that the test conditions of the durability test were changed. The results are as follows.

Test conditions: Same as Test Example 2 TF value: Before test: 91% After test: 80% or more From the results, the light guide lens array molded from ethylene/TCD-3 random copolymer was made from polymethyl methacrylate. It can be seen that it has superior durability even under high temperature and high humidity conditions compared to a molded light guide lens array.

〔Effect of the invention〕

According to the present invention, since the light guide lens array is formed from a specific cyclic olefin random copolymer (a) or a cyclic olefin ring-opening polymer (b), birefringence is small, durability is high, A light guide lens array with excellent heat resistance, moisture resistance, and dimensional accuracy can be obtained.

[Brief explanation of drawings]

Figure 1 is a perspective view of the light guide lens array of the example, Figure 2 (
, ) is a plan view of the light guide lens array of FIG. 1, (b) is a front view, (C) is a side view, and FIGS. 3 and 4 are plan views of light guide lens arrays of different embodiments. , FIG. 5A is a plan view of a light guiding lens array according to another embodiment, FIG. 5B is a front view, and FIG. 5C is a side view. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the light guiding lens array, 2 is the object side lens section, 3 is the image side lens section, 4 is the first reflective surface, 5 is the roof surface, and 6 is the third 2 reflective surfaces, 7
is a light guiding lens system, 8 is an object, 9 is a real image, 10 is an interval, 1
1 is a document, and 12a, 12b, and 12c are sensors. Figure 3 Figure 4 Agent Patent Attorney Sei Yanagihara 1: 4 light lesbian array 2; 5: Roof surface 6; 2nd opposite #r surface 7: Light guiding thread 8: Ririwai book 9: Real east 10: Interval 11: R1 wall 12a, 12b, 12c 'i'/9〈8/ 1. Figure 6 (a) 7, page 36, line 12 of the detailed description of the amendment is corrected as follows: ``Procedural amendment July 1990 Relationship to Patent Application No. 114182 of 1990''

Claims (3)

[Claims] (1) An object-side lens section into which light is incident, an image-side lens section through which light is emitted, a first reflecting surface that totally reflects the incident light entering from the object-side lens section, and reflection from this first reflecting surface. A light guide in which a plurality of light guide lens systems are arranged, each having a roof surface that inverts an image caused by reflected light, and a second reflecting surface that totally reflects the reflected light reflected from the roof surface and guides it to the image side lens part. In the optical lens array, the intrinsic viscosity [η] measured in decalin at 135 ° C. is 0.05 to 10 dl/g (a) from a copolymer of cyclic olefin and ethylene represented by the following general formula [I] or (b) a ring-opening polymer of a cyclic olefin represented by the following general formula [I] or a hydrogenated product thereof. lens array. ▲There are mathematical formulas, chemical formulas, tables, etc.▼…[I] (In the formula, n is 0 or 1, m is 0 or a positive integer, R^
1 to R^1^8 each independently represent an atom or group selected from the group consisting of a hydrogen atom, a halogen atom, and a hydrocarbon group. Furthermore, R^1^5 to R^1^8 may be combined with each other to form a monocyclic or polycyclic ring, and R^1
^5 and R^1^6, or R^1^7 and R^1^8
and may form a divalent hydrocarbon group. R^1^
The monocyclic or polycyclic ring formed by 5 to R^1^8 may have a double bond. ) (2) The light guiding lens array according to claim (1), wherein the object side lens section and the image side lens section are arranged at positions where the optical axis of the object side lens section and the optical axis of the image side lens section coincide. (3) The light guiding lens array according to claim (1), wherein the object side lens section and the image side lens section are arranged at positions where the optical axis of the object side lens section and the optical axis of the image side lens section are shifted from each other.