WO2013179543A1

WO2013179543A1 - Lens, hybrid lens, replacement lens, and image capture device

Info

Publication number: WO2013179543A1
Application number: PCT/JP2013/001876
Authority: WO
Inventors: 小林　信幸
Original assignee: パナソニック株式会社
Priority date: 2012-05-29
Filing date: 2013-03-19
Publication date: 2013-12-05
Also published as: JP2015155928A

Abstract

The present invention provides a new lens which has a prescribed anomalous dispersion and a resin in a matrix. The present invention is a lens which includes a resin as a matrix, and an organic semiconductor material which is dispersed in the resin. The present invention is also a hybrid lens, comprising a first lens which is a substrate, and a second lens which is layered upon the first lens, and including a resin. The second lens includes a resin as a matrix, and an organic semiconductor member which is dispersed in the resin.

Description

Lens, hybrid lens, interchangeable lens, and imaging device

The present invention relates to a lens including a resin as a matrix. The present invention also relates to a hybrid lens comprising the lens. The present invention also relates to an interchangeable lens and an imaging apparatus including the lens or the hybrid lens.

In order to widen the range of optical characteristics, optical materials in which inorganic fine particles are dispersed in a matrix material such as a resin are known. Hereinafter, such a material is referred to as a composite material.

A technique for realizing a predetermined anomalous dispersion using such a composite material is known.

For example, Patent Document 1 discloses that antimony-doped tin oxide particles (A) 1 to 30% by mass and an organic compound (B) having one or more polymerizable functional groups in one molecule are 65% by mass or more and less than 98% by mass. And a material composition containing 0.1 to 5% by mass of a polymerization initiator (C) and an optical element using the same. Patent Document 1 is a technique for imparting low anomalous dispersion to an optical element (lens) by adding antimony-doped tin oxide particles to a resin matrix.

Since the optical properties required for lenses are wide, a technology for controlling the anomalous dispersion of the lens is very useful in the optical field, and the development of a technology for controlling the anomalous dispersion of the lens by a new method is desired. .

JP 2011-6536 A

An object of the present invention is to provide a novel lens having a predetermined anomalous dispersion and using a resin as a matrix.

The lens that solves the above problems includes a resin as a matrix and an organic semiconductor material dispersed in the resin.

According to the above lens, a novel lens having a predetermined anomalous dispersion and using a resin as a matrix can be realized.

Schematic sectional view showing the lens of Embodiment 1 The elements on larger scale of the cross section of the lens of Embodiment 1 Schematic sectional view showing the hybrid lens of the second embodiment Schematic showing the manufacturing process of the hybrid lens of Embodiment 2 Schematic which shows the interchangeable lens of Embodiment 3, and the imaging device of Embodiment 4. FIG.

One embodiment of the present invention is a lens including a resin as a matrix and an organic semiconductor material dispersed in the resin.

Another embodiment of the present invention includes a first lens serving as a substrate,
A hybrid lens comprising a second lens laminated on the first lens and containing a resin,
The second lens is a hybrid lens that is the lens described above.

Another embodiment of the present invention is an interchangeable lens that is detachable from an image pickup apparatus and includes the above-described lens or hybrid lens.

Another embodiment of the present invention is an imaging apparatus including the above-described lens or hybrid lens.

Hereinafter, the present invention will be described in detail with reference to specific embodiments, but the present invention is not limited to these embodiments, and may be appropriately modified and implemented without departing from the technical scope of the present invention. be able to.

<Embodiment 1>
Hereinafter, the lens 1 of Embodiment 1 will be described with reference to the drawings.

[1. lens]
FIG. 1 is a schematic cross-sectional view of a lens 1 having a refractive index distribution according to the present embodiment. The lens 1 is a disk-shaped member composed of the optical unit 2. The lens 1 is a biconvex lens.

The lens 1 includes a first optical surface 3, a second optical surface 4, and an outer peripheral surface 5. The first optical surface 3 and the second optical surface 4 are opposed to each other in the optical axis X direction.

The outer peripheral surface 5 is a surface that connects the end of the first optical surface 3 and the end of the second optical surface 4. The outer peripheral surface 5 is a side surface of the lens 1.

The outer diameter of the lens 1 is defined by the outer peripheral surface 5. In the present embodiment, the outer diameter is, for example, 10 to 100 mm.

[2. Lens material]
FIG. 2 is a partial enlarged cross-sectional view for explaining the lens 1.

As shown in FIG. 2, the lens 1 is composed of a lens material including a resin 31 as a matrix and an organic semiconductor material 33 dispersed in the resin 31. The resin 31 and the organic semiconductor material 33 are essential components for the lens material. In the present embodiment, the lens material further includes inorganic fine particles 32 that are optional components, and the inorganic fine particles 32 are also dispersed in the resin 31. Thus, the lens material is configured as a composite material 35. In the present embodiment, the inorganic fine particles 32 have a refractive index higher than that of the resin 31.

[3. resin]
As the resin 31, a resin having high translucency can be used from resins such as a thermoplastic resin, a thermosetting resin, and an energy ray curable resin. For example, acrylic resin, methacrylic resin such as polymethyl methacrylate, epoxy resin, polyethylene terephthalate, polyester resin such as polybutylene terephthalate and polycaprolactone, polystyrene resin such as polystyrene, olefin resin such as polypropylene, polyamide resin such as nylon, polyimide And polyimide resins such as polyetherimide, polyvinyl alcohol, butyral resin, vinyl acetate resin, and alicyclic polyolefin resin may be used. Further, engineering plastics such as polycarbonate, liquid crystal polymer, polyphenylene ether, polysulfone, polyethersulfone, polyarylate, and amorphous polyolefin may be used. Also, a mixture or copolymer of these resins (polymers) may be used. Further, a resin obtained by modifying these resins may be used.

Among the above, acrylic resins and methacrylic resins are preferable, and have (meth) acrylates having at least one group selected from the group consisting of oxyethylene groups, oxypropylene groups, and oxyisopropylene groups, and polyalicyclic structures ( A resin obtained by polymerizing and curing (meth) acrylate or epoxy (meth) acrylate is more preferable. Specific examples of the (meth) acrylate are shown below.

In addition, when using a thermosetting resin, it is often necessary to use a catalyst or curing agent for curing the resin, and when using an energy ray curable resin, a polymerization initiator for curing the resin. It is often necessary to use Therefore, these components may remain in the resin 31.

Further, the resin 31 may contain a residue (monomer) and by-product (oligomer or the like) of the resin material as long as the effects of the present invention are not impaired.

The resin 31 may contain additives such as an antioxidant, an ultraviolet absorber, a release agent, a conductive agent, an antistatic agent, a surfactant, and a heat stabilizer as long as the effects of the present invention are obtained.

[4. Inorganic fine particles]
The inorganic fine particles 32 may be either aggregated particles or non-aggregated particles, and generally include primary particles 32a and secondary particles 32b formed by aggregating a plurality of primary particles 32a. The dispersion state of the inorganic fine particles 32 is not particularly limited since the effect is obtained as long as the inorganic fine particles are present in the matrix material, but it is preferable that the inorganic fine particles 32 are uniformly dispersed in the resin 31. Here, “the inorganic fine particles 32 are uniformly dispersed in the resin 31” means that the primary particles 32 a and the secondary particles 32 b of the inorganic fine particles 32 are not unevenly distributed at specific positions in the composite material 35. It is uniformly dispersed. In order to suppress translucency as an optical material, it is preferable to have good particle dispersibility. Therefore, it is preferable that the inorganic fine particles 32 are composed only of the primary particles 32a.

In order to ensure the translucency of the composite material 35 in which the inorganic fine particles 32 are dispersed, the particle size of the inorganic fine particles 35 is important. When the particle diameter of the inorganic fine particles 32 is sufficiently smaller than the wavelength of light, the composite material 35 in which the inorganic fine particles 32 are dispersed can be regarded as a homogeneous medium having no refractive index variation. Therefore, it is preferable that the maximum particle size of the inorganic fine particles 32 is not larger than the wavelength of visible light. For example, since visible light has a wavelength in the range of 400 nm to 700 nm, the maximum particle size of the inorganic fine particles 32 is preferably 400 nm or less. The maximum particle size of the inorganic fine particles 32 is obtained, for example, by taking a scanning electron microscope (SEM) photograph of the inorganic fine particles 32 and determining the largest particle size of the inorganic fine particles 32 (secondary particle size in the case of secondary particles). It can be determined by measuring.

When the particle diameter of the inorganic fine particles 32 is larger than ¼ of the wavelength of light, the translucency may be impaired by Rayleigh scattering. Therefore, in order to realize high translucency in the visible light region, the center particle diameter (median diameter: d50) of the inorganic fine particles 32 is preferably 100 nm or less. However, when the particle size of the inorganic fine particles is less than 1 nm, fluorescence may be generated when the inorganic fine particles are made of a material that exhibits a quantum effect, which is a characteristic of the optical component formed using the composite material 35. May have an effect. From the above viewpoint, the center particle size of the inorganic fine particles is preferably in the range of 1 nm to 100 nm, and more preferably in the range of 1 nm to 50 nm. In particular, it is more preferable that the particle size of the inorganic fine particles 32 is 20 nm or less because the influence of Rayleigh scattering becomes very small and the translucency of the composite material 35 becomes particularly high. The center particle size of the inorganic fine particles 32 is, for example, a photograph of a scanning electron microscope (SEM) of the inorganic fine particles, and the particle size (secondary particle size in the case of secondary particles) of 200 or more inorganic fine particles. ) Can be obtained by measuring.

Examples of the material of the inorganic fine particles 32 include metal element oxides and fluorides. Examples of metal element oxides include silicon oxide, zirconium oxide, titanium oxide, zinc oxide, aluminum oxide, yttrium oxide, barium titanate, europium oxide, magnesium oxide, niobium oxide, tantalum oxide, tungsten oxide, hafnium oxide, Indium oxide, indium phosphate, tin oxide, indium tin oxide, cerium oxide, barium sulfate, gadolinium oxide, lanthanum oxide, and the like can be given. Silicon oxide includes those having voids formed therein, such as porous silica. Examples of fluorides include magnesium fluoride, cerium fluoride, lanthanum fluoride, niobium fluoride, yttrium fluoride, and the like. However, the material of the inorganic fine particles 32 is naturally not limited to these.

The refractive index of these inorganic fine particles 32 varies depending on the material. Therefore, some materials have a higher refractive index than that of the resin 31 and some have a lower refractive index. In the present embodiment, the inorganic fine particles 32 have a refractive index higher than that of the resin 31, but the material of the inorganic fine particles 32 may be properly used depending on the optical characteristics required for the lens 1.

Further, the refractive index of the composite material 35 in which the inorganic fine particles 32 are dispersed in the resin 31 can be adjusted by adjusting the particle diameter, the number, and the like of the inorganic fine particles 32.

[5. Organic semiconductor materials]
In the present embodiment, an organic semiconductor material 33 is added to the resin 31. By adding the organic semiconductor material 33, the anomalous dispersion of the lens material can be changed and controlled. Here, the anomalous dispersion is expressed by ΔPg, F which is a deviation between a point on the standard line of normal dispersion glass corresponding to the Abbe number νd of each material and the partial dispersion ratio Pg, F of the material. The partial dispersion ratios Pg and F are numerical values defined by the following mathematical formula (1). In Formula (1), ng, nF, and nC are refractive indexes of g-line (wavelength 435.8 nm), F-line (wavelength 486 nm), and C-line (wavelength 656 nm), respectively.

Pg, F = (ng-nF) / (nF-nC) (1)

Regarding ΔPg, F, by adding the organic semiconductor material 33, the values of ΔPg, F of the lens 1 can be reduced. In particular, a resin material to be a matrix and arbitrary inorganic fine particles are appropriately selected. Therefore, the lens 1 can also have a small positive anomalous dispersion or a negative anomalous dispersion such that ΔPg, F is less than 0.03.

Also, the resin and the lens material in which the organic semiconductor material is dispersed in the resin show a tendency that the ΔPg and F values tend to decrease as the thickness decreases. This is presumably because the organic semiconductor material is oriented in a direction parallel to the lens surface when the lens is molded.

The addition amount of the organic semiconductor material 33 is preferably 0.01 wt% or more, more preferably 0.05 wt% or more with respect to the resin 31 because an effect of reducing the values of ΔPg and F is easily obtained. Is more preferable. On the other hand, when the addition amount of the organic semiconductor material 33 is large, the organic semiconductor material 33 may be precipitated from the resin 31 depending on the type of the resin 31. Therefore, it is preferable to add the organic semiconductor material 33 in a range where the organic semiconductor material 33 does not precipitate from the resin 31. Specifically, the addition amount is preferably 15 wt% or less, more preferably 10 wt% or less, and further preferably 8 wt% or less with respect to the resin 31.

The type of the organic semiconductor material 33 is not particularly limited as long as it is an organic compound exhibiting properties as a semiconductor. The organic compound essentially contains a carbon atom and a hydrogen atom, and may further contain a sulfur atom, an oxygen atom, a nitrogen atom or the like, and particularly preferably further contains a sulfur atom. The organic compound is preferably a compound having at least one aromatic ring.

Examples of the organic semiconductor material 33 include poly (3-hexylthiophene-2,5-diyl), poly (3-octylthiophene-2,5-diyl), and poly (3-dodecylthiophene-2,5-diyl). Poly [bis (4-phenyl) (2,4,6-trimethylphenyl) amine], poly [2-methoxy-5- (2-ethylhexyloxy) -1,4-phenylenevinylene], poly [2- Methoxy-5- (3 ′, 7′-dimethyloctyloxy) -1,4-phenylenevinylene], poly [(9,9-di-n-octylfluorenyl-2,7-diyl) -alt- ( Benzo [2,1,3] thiadiazo-4,8-diyl)], poly [(9,9-dioctylfluorenyl-2,7-diyl) -co-bithiophene], poly (3-octylthiophene-2 , 5 Macromolecular organic semiconductor compounds such as diyl-co-3-decyloxythiophene-2,5-diyl), poly (3,4-ethylenedioxythiophene) / poly (styrenesulfonate), polyacetylene, polypyrrole, polyaniline; 2-bromo-3- (bromomethyl) thiophene, 3-bromo-4-methylthiophene, 2,5-dibromothiophene, thieno [3,2-b] thiophene, 5-fluoro-2,3-thiophenedicarboxaldehyde, 2,5-dibromo-3,4-ethylenedioxythiophene, thieno [2,3-b] thiophene, 3,4-ethylenedioxythiophene, dithieno [3,2-b] thiophene, 2,2 ′: 5 Monomers such as, 5′-terthiophene and oligomers and polymers obtained using such monomers; Tacene, anthracene, rubrene, 2,7-ditridecyl [1] benzothieno [3,2-b] benzothiophene, dinaphtha [2,3-b: 2′3′-f] thiaphena [3,2-b] thiaphene, A low molecular organic semiconductor compound such as 2,6-diphenylbenzo [1,2-b: 4,5-b] dithiophene, oligo (p-phenylene vinylene), tetracyanoquinodimethane (TCNQ) can be used.

The organic semiconductor material 33 is preferably a compound having a thiophene ring.

The organic semiconductor material 33 may be dispersed as particles in the resin 31 or may be dissolved and dispersed. When the organic semiconductor material 33 is dispersed as particles, the maximum particle size is preferably 400 nm or less, like the inorganic fine particles 32. The central particle size is preferably in the range of 1 nm to 100 nm, more preferably in the range of 1 nm to 50 nm, and still more preferably in the range of 1 nm to 20 nm.

It should be noted that the lens material is a residue (monomer, polymerization initiator, etc.) when the above-described polymer organic semiconductor compound used as the organic semiconductor material 33 is produced within a range that does not impair the effects of the present invention. And by-products (such as oligomers) may be included.

[6. Production method]
For example, the lens 1 is prepared by preparing a mixture in which the organic semiconductor material 33 and, if necessary, the inorganic fine particles 32 are dispersed in the resin 31 or the resin raw material, and molding the mixture using a lens mold having a shape corresponding to the lens. Can be manufactured.

For example, when the resin 31 is a thermoplastic resin, a mixture in which the organic semiconductor material 33 and, if necessary, the inorganic fine particles 32 are uniformly dispersed in the thermoplastic resin is heated to a temperature equal to or higher than the melting point of the thermoplastic resin. The lens 1 can be manufactured by filling the lens mold and cooling.

For example, when the resin 31 is a thermosetting resin, the lens mold is filled with a mixture in which the organic semiconductor material 33 and, if necessary, the inorganic fine particles 32 are dispersed in the raw material of the thermosetting resin, and thermosetting is performed. The lens 1 can be manufactured by thermosetting the raw material of the functional resin.

For example, when the resin 31 is an energy ray curable resin, a transparent lens mold is filled with a mixture in which the organic semiconductor material 33 and, if necessary, the inorganic fine particles 32 are dispersed in the raw material of the energy ray curable resin. Then, the lens 1 can be manufactured by irradiating energy rays to cure the raw material of the energy ray curable resin. In order to facilitate polymerization and curing, the mixture preferably contains a polymerization initiator. As the energy ray polymerization type polymerization initiator, a hydroxyketone compound having a molecular weight of 150 to 2,000 is suitable.

<Embodiment 2>
Next, the hybrid lens 40 according to Embodiment 2 will be described with reference to the drawings.

FIG. 3 is a schematic cross-sectional view showing the hybrid lens 40. The hybrid lens 40 includes a first lens 41 serving as a base material made of a glass material or the like, and a second lens 42 made of the lens material (composite material 35). The second lens 42 is stacked on the optical surface of the first lens 41.

As the second lens 42, the lens 1 described in the first embodiment is used (however, one of the optical surfaces has a concave shape).

Next, a method for manufacturing the hybrid lens 40 will be described with reference to FIG. Here, the resin constituting the composite material 35 is an energy ray curable resin.

FIG. 4 is a schematic view showing the manufacturing process of the hybrid lens 40.

First, the first lens 41 is molded. The first lens 41 is molded using a known manufacturing method such as lens polishing, injection molding, or press molding.

Next, as shown in FIG. 4 (a), using the dispenser 50, the raw material of the energy ray curable resin, the organic semiconductor material, and the optional material containing the energy ray polymerization type polymerization initiator on the molding surface of the molding die 51 are used. A mixture 52 (raw material of the composite material 35) in which the inorganic fine particles of the components are uniformly mixed is discharged.

Next, as shown in FIG. 4B, the first lens 41 is placed from above the mixture 52 and spread until the mixture 52 has a predetermined thickness.

And as shown in FIG.4 (c), the mixture 52 is hardened by irradiating an energy ray (for example, ultraviolet-ray) from the light source 53 from the upper direction of the 1st lens 41, and the 2nd lens 42 is formed.

<Embodiments 3 and 4>
Next, the interchangeable lens 120 according to the third embodiment and the imaging apparatus (camera 100) according to the fourth embodiment will be described with reference to the drawings. FIG. 5 shows a schematic diagram of the camera 100.

The camera 100 includes a camera body 110 and an interchangeable lens 120 attached to the camera body 110. The camera 100 is an example of an imaging device.

The camera body 110 has an image sensor 130.

The interchangeable lens 120 is configured to be detachable from the camera body 110. The interchangeable lens 120 is, for example, a telephoto zoom lens. The interchangeable lens 120 has an imaging optical system 140 for focusing the light beam on the image sensor 130 of the camera body 120. The imaging optical system 140 includes the lens 1 and

refractive lenses

150 and 160.

As a modification of the interchangeable lens 120 and the camera 100, the hybrid lens 40 can be used instead of the lens 1.

As a modification of the camera 100, the camera has a camera main body and a lens unit that is not separable from the camera main body, and the lens unit includes the lens 1 or the hybrid lens 40. Is also possible.

Hereinafter, the present invention will be described in detail with reference to examples and comparative examples, but the present invention is not limited to the examples. Table 1 summarizes the contents of the examples and comparative examples.

<Example 1>
After mixing the compounds represented by chemical formula (1) and chemical formula (37) at a weight ratio of 10: 1, 3 wt% of a polymerization initiator (Irgacure184, manufactured by BASF; 1-Hydroxycyclohexyl phenyl ketone, molecular weight 204) is added to the resin raw material A was prepared. To this, ZnO fine particles were added to prepare a composite material. To this composite material, 1% by weight of poly (3-hexylthiophene-2,5-diyl) (manufactured by Aldrich; indicated as X in Table 1) as an organic semiconductor material is added to the resin raw material A and mixed. And dispersed. This was irradiated with ultraviolet rays (80 mw / cm ² · 90 sec) using a UV irradiation apparatus (SP-9, manufactured by Ushio) to prepare a sample of a lens material having a thickness of 100 μm. The optical properties (refractive index, Abbe number, ΔPg, F) of the obtained measurement sample were measured using a prism coupler (MODEL 2010, manufactured by Metricon). The results are shown in Table 1.

Table 1 shows that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced.

<Example 2>
A lens material sample was prepared and optical characteristics were evaluated in the same manner as in Example 1 except that the thickness of the lens material sample was changed to 60 μm. The results are shown in Table 1. It can be seen from Table 1 that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced.

<Example 3>
A lens material sample was prepared and optical characteristics were evaluated in the same manner as in Example 1 except that the thickness of the lens material sample was changed to 30 μm. The results are shown in Table 1. Table 1 shows that a lens material exhibiting negative anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting negative anomalous dispersion can be produced. From the results of Examples 1 to 3, it can be seen that the value of ΔPg, F decreases as the thickness of the lens material decreases.

<Example 4>
A sample of the lens material was prepared and the optical characteristics were evaluated in the same manner as in Example 1 except that the amount of the organic semiconductor material added was changed to 5 wt% with respect to the resin raw material A. The results are shown in Table 1. It can be seen from Table 1 that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced.

<Example 5>
Instead of the compound represented by the chemical formula (1) and the chemical formula (37), the compound represented by the chemical formula (5) is used, and instead of poly (3-hexylthiophene-2,5-diyl), 2,7- A sample of the lens material was prepared in the same manner as in Example 1 except that ditridecyl [1] benzothieno [3,2-b] benzothiophene (Aldrich; indicated as Y in Table 1) was used. Characteristics were evaluated. The results are shown in Table 1. It can be seen from Table 1 that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced.

<Example 6>
A lens material sample was prepared and optical characteristics were evaluated in the same manner as in Example 5 except that the thickness of the lens material sample was changed to 60 μm. The results are shown in Table 1. It can be seen from Table 1 that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced. From the results of Examples 5 and 6, it can be seen that the value of ΔPg, F decreases as the thickness of the lens material decreases.

<Example 7>
Polymerization initiator (ESACURE KIP150, manufactured by Lamberti; Oligo [2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propanone], molecular weight instead of polymerization initiator (Irgacure184, manufactured by BASF) A sample of a lens material was prepared and optical characteristics were evaluated in the same manner as in Example 1 except that 550 (weight average) was used. The results are shown in Table 1. It can be seen from Table 1 that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced.

<Example 8>
2,6-diphenylbenzo [1,2-b: 4,5-b ′] dithiophene (Aldrich; in Table 1) instead of poly (3-hexylthiophene-2,5-diyl) as an organic semiconductor material In the same manner as in Example 1, except that the thickness of the lens material sample was changed to 30 μm, a sample of the lens material was prepared and the optical characteristics were evaluated. The results are shown in Table 1. It can be seen from Table 1 that a lens material exhibiting a small positive anomalous dispersion is obtained. Therefore, it can be seen that a lens exhibiting a small positive anomalous dispersion can be produced.

<Comparative Example 1>
A lens material sample was prepared and optical characteristics were evaluated in the same manner as in Example 1 except that no organic semiconductor was added. The results are shown in Table 1. From Table 1, it can be seen that the sample of Comparative Example 1 exhibits a larger positive anomalous dispersion than the sample of the Example. This is presumably because the organic semiconductor material is not included, and the absorption characteristics particularly in the short wavelength region are increased.

<Comparative example 2>
A lens material sample was prepared and optical characteristics were evaluated in the same manner as in Example 1 except that the organic semiconductor was not added and the thickness of the lens material sample was changed to 60 μm. The results are shown in Table 1. It can be seen that the sample of Comparative Example 2 exhibits a larger positive anomalous dispersion than the sample of the Example. In Comparative Examples 1 and 2, the values of ΔPg, F tended to decrease as the thickness of the lens material decreased. However, the amount of decrease in ΔPg, F was small compared to the example. Recognize.

The lens and hybrid lens of the present invention can be suitably used for an imaging device, an interchangeable lens of the imaging device, a DVD optical system, and the like.

Claims

A lens containing a resin as a matrix and an organic semiconductor material dispersed in the resin.
The lens according to claim 1, wherein ΔPg, F indicating anomalous dispersion of the lens is less than 0.03.
The lens according to claim 1, wherein the organic semiconductor material is a compound containing a sulfur atom.
The lens according to claim 3, wherein the organic semiconductor material is a compound having a thiophene ring.
The resin is a polymerized cured product of an energy beam curable resin, and the polymerized cured product of the energy beam curable resin is polymerized and cured using a hydroxyketone compound having a molecular weight of 150 to 2000 as a polymerization initiator. The lens according to claim 1.
The lens according to claim 1, further comprising inorganic fine particles.
A first lens as a substrate;
A hybrid lens comprising a second lens laminated on the first lens and containing a resin,
The hybrid lens, wherein the second lens is the lens according to claim 1.
An interchangeable lens comprising the lens according to claim 1 and detachable from an imaging apparatus.
An interchangeable lens comprising the hybrid lens according to claim 7 and detachable from an imaging device.
An imaging apparatus comprising the lens according to claim 1.
An imaging apparatus comprising the hybrid lens according to claim 7.