WO2002027377A1

WO2002027377A1 - Imaging lens, imaging unit, and electronic camera

Info

Publication number: WO2002027377A1
Application number: PCT/JP2001/008642
Authority: WO
Inventors: Keizo Ishiguro; Kazutake Boku; Syuusuke Ono
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2000-09-29
Filing date: 2001-10-01
Publication date: 2002-04-04
Also published as: JP2006023321A

Abstract

An imaging unit having an imaging lens capable of reducing the size and thickness of the entire lens, comprising a diaphragm (11), a convex lens (22) as the imaging lens, and a flat plate (13) equivalent to the face plate of a CCD (14) disposed in that order ranging from a body (object) to an image face, wherein a lens material absorbing infrared region is used for the convex lens (22), and a phase lattice (210) for removing high frequency components is formed on one lens surface.

Description

Description Imaging lens, imaging unit, and electronic camera

The present invention relates to an imaging lens, an imaging unit, and an electronic camera, and in particular, to reduce the size and cost of an imaging lens for an electronic camera using an imaging element that is an image input unit of an information device such as a mobile phone or a PD. It's about what you're trying to do. Background art

Recent advances in communication technology have enabled video information as well as textual and audio information to communicate with each other. For this reason, communication devices such as mobile phones and PDAs (Personal Digital Assistants) have come to be equipped with small cameras using CCD and CMOS sensors. There is a strong demand for miniature cameras in this field to be ultra-compact, ultra-thin, and inexpensive to carry.

However, imaging devices such as the CCD and CMOS sensors described above sample images in two dimensions, so high frequencies that are more than half the sampling frequency are false signals. In order to remove this in advance, a quartz optical low-pass filter was required between the lens element and the image sensor. In addition, since the above-mentioned imaging device has sensitivity not only in the visible region but also in the long wavelength side, it is necessary to block the long wavelength infrared region. It needed to be incorporated.

The necessity of these two types of filters has restricted the miniaturization and cost reduction of the imaging unit. In order to address this problem, for example, Japanese Patent Application Laid-Open No. Hei 8-210729 discloses that a flat infrared shielding plate has a lens made of a plastic material and a phase grating serving as an optical aperture filter. And a method of integrally forming the two by bonding together.

The conventional imaging lens is configured as described above, and the optical element disclosed in Japanese Patent Application Laid-Open No. H08-201729 is miniaturized because the functional elements are bonded and integrated. However, since the individual elements are created and bonded independently, the thickness required for each functional element does not change, and there is a problem that further miniaturization and cost reduction are difficult. Was.

Also, in the case of a plastic lens, depending on the material, it may be difficult to form an anti-reflection film, which may cause a difficulty in improving the lens yield.

The present invention has been made in order to solve the above problems, and has been made to use an imaging lens capable of realizing a small and thin lens as a whole and at a low cost, and using the imaging lens. It is an object to provide an imaging unit and an electronic force camera. Disclosure of the invention

An imaging lens according to claim 1 of the present invention is an imaging lens that forms a subject image on an imaging device, wherein the imaging lens is formed by using a material that blocks light in an infrared region. It is composed of a convex lens.

Further, the imaging lens according to claim 2 of the present invention is the imaging lens according to claim 1, further comprising a stop closer to the object than the convex lens forming the imaging lens, It satisfies the condition of focal length f, radius of curvature rl of the convex lens on the object side, and force of 2.0 to fZr1 to 0.

Further, the imaging lens according to claim 3 of the present invention is the same as the imaging lens according to claim 1 or 2, wherein the convex lens constituting the imaging lens is The lens surface on the lens side is an aspheric surface, the local radius of curvature R 10 near the optical axis of the lens surface on the object side of the convex lens, the local radius of curvature R 11 on the outer periphery thereof, and the force IR 11 I / IR 10 I <0.4 is satisfied.

The imaging lens according to claim 4 of the present invention is the imaging lens according to any one of claims 1 to 3, wherein the convex lens constituting the imaging lens has an image plane. The lens surface on the image side of the convex lens is an aspheric surface, and the local radius of curvature R 20 near the optical axis of the lens surface on the image surface side of the convex lens, and the local radius of curvature R 21 on the outer peripheral portion and the force R 0. 7 | R 2 l | Z | R 20 | Further, the imaging lens according to claim 5 of the present invention is the imaging lens according to any one of claims 1 to 4, which constitutes the imaging lens. A phase grating having the function of an optical low-pass filter is formed on either the object side or the image side of the convex lens.

The imaging lens according to claim 6 of the present invention is the imaging lens according to claim 5, wherein the phase grating is disposed at least in one direction on a surface of the convex lens on the subject side. It is formed with a periodic structure.

Further, the imaging lens according to claim 7 of the present invention is the imaging lens according to any one of claims 1 to 6, wherein the object side and the image of the convex lens constituting the imaging lens are provided. Θ because the anti-reflection film is formed on both surfaces.

Further, an imaging unit according to claim 8 of the present invention is an imaging unit having an imaging element and an imaging lens for forming an image of a subject on the imaging element, wherein the imaging lens comprises: Item 8. The imaging lens according to any one of Items 1 to 7, further comprising a holder member that holds the imaging lens and seals the imaging element.

An electronic camera according to a ninth aspect of the present invention is configured using the imaging lens described in any one of the first to seventh aspects of the present invention.

An electronic camera according to claim 10 of the present invention is configured using the imaging unit according to claim 8.

As described above, according to the imaging lens according to claim 1 of the present invention, in the imaging lens that forms an object image on the imaging device, the imaging lens blocks light in an infrared region. Since the lens is made of a convex lens formed using the same material, the same member can simultaneously achieve the lens imaging function and infrared shielding function, making the entire lens smaller and thinner and simplifying the processing of the member. As a result, it is possible to provide an inexpensive imaging lens and a lens unit, and it is possible to provide an inexpensive ultra-small electronic camera using the imaging lens.

Further, according to the imaging lens according to claim 2 of the present invention, in the imaging lens according to claim 1, the diaphragm is arranged closer to the subject than the convex lens, the focal length of the convex lens is f, and the convex lens is Assuming that the radius of curvature of the object side of r is r1, satisfies the relationship of _2.0 <f / r1 <0, so that one convex lens has chromatic aberration and The effect that various aberrations including a tune can be favorably corrected can be obtained.

Further, the imaging lens according to claim 3 of the present invention is the imaging lens according to claim 1 or 2, wherein the convex lens has an aspherical surface on the object side, and the convex lens has an aspheric surface on the object side. Assuming that the local radius of curvature of the lens surface near the optical axis is R10 and the local radius of curvature of its outer periphery is R11, | R11 | Z | R10 | By satisfying the relationship, it is possible to obtain an effect that astigmatism and field curvature can be favorably corrected.

Further, according to the imaging lens of claim 4 of the present invention, the convex lens has an aspheric surface on the image surface side, and has a local curvature radius near the optical axis of the lens surface on the image surface side of the convex lens. R 20, assuming that the local radius of curvature of the outer peripheral portion is R 21, by satisfying the relationship 0.7 | R 21 I / IR 20 I <1.2, spherical aberration and coma Can be satisfactorily corrected.

Further, according to the imaging lens according to claim 5 of the present invention, in the imaging lens according to any one of claims 1 to 4, an optical low-pass filter is provided on any surface of the convex lens. Since a phase grating is formed, which has the function of, in addition to the function of shielding infrared rays, high-frequency image components can be suppressed with a single convex lens, so that the effect of reducing the size and cost of the lens unit can be obtained. .

Further, the imaging lens according to claim 6 of the present invention is the imaging lens according to claim 5, wherein the imaging lens is formed on the surface of the convex lens on the subject side with a periodic structure in at least one direction. Thus, the effect that the high frequency component of the image can be suppressed using the convex lens can be obtained.

Further, the imaging lens according to claim 7 of the present invention is the imaging lens according to any one of claims 1 to 6, wherein the object side and the image of the convex lens constituting the imaging lens are provided. Since the anti-reflection films are formed on both surfaces, the transmissivity can be improved and the lens surface can be protected.

Further, an imaging unit according to claim 8 of the present invention is an imaging unit having an imaging element and an imaging lens for forming a subject image on the imaging element, wherein the imaging lens is An imaging lens according to any one of Items 1 to 7 And a holder member for holding the imaging lens and enclosing the imaging element is provided, so that the entire imaging unit can be reduced in size and the cost can be reduced. .

Also, since the electronic camera according to claim 9 of the present invention is configured using the imaging lens according to any one of claims 1 to 7, an ultra-compact and inexpensive information device is provided. The effect is that an electronic force film for the camera can be provided. In addition, the electronic camera according to claim 10 of the present invention is configured using the imaging unit according to claim 8, and thus provides an ultra-compact and inexpensive electronic camera for information equipment. The effect that it can be obtained is obtained. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram showing a configuration of an imaging lens according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing a configuration of an imaging lens according to Embodiment 2 of the present invention. FIG. 3 is a diagram showing a configuration of an imaging lens unit according to Embodiment 3 of the present invention.

FIG. 4 is a diagram showing a configuration centered on an imaging lens unit of an electronic camera according to Embodiment 4 of the present invention.

FIG. 5 is a diagram showing aberrations of the imaging lens according to the first example of the imaging lens according to the first embodiment.

FIG. 6 is a diagram illustrating aberrations of the imaging lens according to the second example of the imaging lens according to the first embodiment.

FIG. 7 is a diagram illustrating aberrations of the imaging lens according to the third example of the imaging lens according to the first embodiment.

FIG. 8 is a diagram showing aberrations of the imaging lens according to Specific Example 4 of the imaging lens according to the first embodiment.

FIG. 9 is a diagram showing aberrations of the imaging lens according to the specific example 5 of the imaging lens according to the first embodiment.

FIG. 10 is a diagram illustrating aberrations of the imaging lens according to Specific Example 6 that does not satisfy the conditions of the imaging lens according to the first embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1)

Hereinafter, the imaging lens according to the first embodiment of the present invention will be described. FIG. 1 is a diagram showing a configuration of an image pickup section centered on an aspherical zoom lens which is an image pickup lens of the first embodiment. In the figure, reference numeral 12 denotes a convex lens, which is made of a lens material that absorbs the infrared region. Therefore, in addition to the lens function of forming an image of a subject on the CCD 14, light in the infrared region is also emitted. It has the function of shutting off. As a lens material absorbing the infrared region, for example, a glass material mixed with copper oxide is used. The convex lens 12 is disposed close to and behind the stop 11 when viewed from the subject. As a result, even with a single convex lens, occurrence of chromatic aberration of magnification in particular can be minimized. Reference numeral 13 denotes a flat plate equivalent to a CCD 14 face plate.

Further, both surfaces of the lens are coated with an anti-reflection film 15 to improve the transmittance and to protect the lens surface. Assuming that the focal length of the convex lens 12 is f and the radius of curvature of the object (subject) side surface 12 a is r 1, as a conditional expression (1),

-2.0 <0/1 <0-(1)

Is preferably satisfied. The above conditional expression (1) relates to the power of the object-side surface. If the lower limit is exceeded, the astigmatic difference increases, and if the upper limit is exceeded, field curvature cannot be corrected.

It is preferable that the lens surface 12 a on the object side of the convex lens 12 be aspherical. Further, the local radius of curvature near the optical axis of the lens surface 12 a is R 10, and the local curvature of the outer peripheral portion is When the radius is R 11, the following conditional expression,

I R 11 I / I R 10 I <0.4. (2)

It is desirable to satisfy the following relationship. If the above conditional expression (2) is not satisfied, that is, if the upper limit is exceeded, the astigmatism is particularly large, and good aberration correction cannot be obtained.

It is preferable that the lens surface 12 b on the image plane side of the convex lens 12 be aspherical. Further, the local curvature radius near the optical axis of this lens surface is R 20, and the local curvature of the outer peripheral portion is R 20. When the radius of curvature is R21, the following conditional expression,

0.7 <| R21 | / | R20 | <1.2 · · · (3)

It is desirable to satisfy the following relationship. If conditional expression (3) is not satisfied, that is, if the lower limit is exceeded, spherical aberration will be insufficiently corrected. If the upper limit is exceeded, spherical aberration will be overcorrected and coma will be generated at the same time, and good aberration correction will not be possible.

In order to manufacture the ultra-small aspherical lens at low cost, the convex lens 12 is preferably manufactured by press molding for transferring the shape of a mold. Although the anti-reflection films 15 are formed on both surfaces of the lens, it is preferable to form the anti-reflection films 15 on both surfaces of the lens rather than on one surface in view of improving transmittance and protecting the lens. .

Hereinafter, three specific examples of the imaging lens satisfying the above conditional expressions (1) to (3) will be described in three cases in which parameters are changed within a range satisfying the conditional expressions.

(Specific example 1)

Table 1 shows specific examples of the convex lens 12. In Table 1, R (mm) is the radius of curvature of the lens, d (mm) is the thickness of the lens or the air gap of the lens, n is the refractive index of each lens for the d-line, and V is the Abbe number of each lens for the d-line. (The same applies to the following specific examples 2 to 6). In FIG. 1, for example, F 1 to F 4 denote the object-side surface of the lens 12, F 2 denotes the image-side surface of the lens 12, and F 2 denotes the object-side surface of the flat plate 13 in FIG. F3, and the image-side surface of the flat plate 13 is F4.

The aspheric shape is defined by the following equation (the same applies to the following specific examples 2 to 6). Number H ² / R

SAG = + DH ⁴ + EH ⁶ + FH ⁸ + G

1+ 1-C1 + K) (H / R) ²

(a)

dH ²

Distance from vertex of point on aspheric surface at height H from SAG optical axis

H Height from optical axis

R radius of curvature of aspherical vertex

K conical constant

D aspheric coefficient

Aspheric coefficient

C local radius of curvature

Table 2 below shows the aspherical shape of the aspherical zoom lens of Example 1 above.

Table 2

In Example 1, as shown in Table 3, with respect to the focal length of the convex lens, the radius of curvature of the surface on the object side satisfies the conditional expression (1) described above, and the field curvature and astigmatism are satisfactory. It has been corrected. In addition, the aspherical shape of the object-side surface satisfies conditional expression (2), and field curvature is well corrected along with conditional expression (1). Furthermore, the aspherical surface shape on the image side satisfies conditional expression (3), and spherical aberration and coma are well corrected. I have.

Table 3

FIG. 5 shows an aberration chart of the imaging lens shown in Table 1 above. FIG. 5 (a) is a diagram of the spherical aberration with respect to the d-line. FIG. 5 (b) is a diagram of astigmatism, where the solid line indicates sagittal field curvature and the dotted line indicates meridional field curvature. Further, Fig. 5 (c) is a diagram showing distortion, and Fig. 5 (d) is a diagram showing axial chromatic aberration. In each case, the solid line is the d line, the dotted line is the F line, and the wavy line is the C line. Indicates the value. Fig. 5 (e) is a diagram of chromatic aberration of magnification. The dotted line shows the value for the F line, and the dashed line shows the value for the C line. Note that the description of the symbols and the like in the above FIGS. 5 (a) to 5 (e) is the same for the subsequent drawings.

As can be seen from FIG. 5, the imaging lens according to Example 1 shows good aberration performance.

(Specific example 2)

Table 4 below shows another specific example 2 of the imaging lens. Table 5 below shows the aspherical shape of the imaging lens of Example 2. Table 4

Table 5

As shown in Table 6, Example 2 satisfies the above-mentioned conditional expressions (1) to (3). Table 6

The imaging lens shown in Table 4 also has good aberration performance, as can be seen from the aberration 14 performance diagram in FIG.

(Specific example 3)

Further, Table 7 below shows another specific example 3 of the imaging lens. Table 8 below shows the aspherical shape of the imaging lens of Example 3. Table 7

Table 8

Specific example 3 satisfies the above-mentioned conditional expressions (1) to (3) as shown in Table 9. f / r1 0.00

Table 9 I R11 I / I R10 | 0.02

| R21 | / | R20 | 1.13 The imaging lenses shown in Table 7 above have excellent aberration performance as can be seen from the aberration performance diagram of FIG.

(Specific example 4)

Table 10 below shows another specific example 4 of the imaging lens. Table 11 below shows the aspherical shape of the imaging lens of this example 4. Table 10

As shown in Table 12, specific example 4 satisfies the above-mentioned conditional expressions (1) to (3). Table 1 2

As can be seen from the aberration performance diagram of FIG. 8, the imaging lens shown in Table 10 also has good aberration ¾fe performance.

(Specific example 5)

Table 13 below shows another specific example 5 of the imaging lens. Table 14 below shows the aspheric shape of the imaging lens of this fifth embodiment. Table 13

Table 14

Specific example 5 satisfies the above-mentioned conditional expressions (1) and (3) as shown in Table 15. Table 15

As can be seen from the aberration performance diagram in FIG. 9, the imaging lenses shown in Table 13 above also show good aberration performance.

(Specific example 6)

Further, Table 16 below shows Specific Example 6 which does not satisfy the conditions of the imaging lens according to the present embodiment. Table 17 below shows the aspherical shapes of the imaging lens of Example 6. Table 16

Table 17

Table 18

As shown in Table 18, the specific example 6 exceeds the lower limit of the conditional expression (1). If the lower limit is exceeded, the radius of curvature of the object-side surface becomes relatively smaller than the focal length, and as can be seen from the aberration performance diagram of FIG. 10, astigmatism increases. Furthermore, the astigmatic difference, which is the difference between the dotted line and the solid line, is also large, indicating that the performance is greatly degraded. Furthermore, the radius of curvature is smaller as the lower limit of conditional expression (3) is exceeded.

Therefore, when the lens of Example 6 is made of a glass material mixed with oxidized copper, which is a glass material having a large coefficient of thermal expansion, the radius of curvature is small, so that the center and periphery of the lens are formed at the time of molding. The difference in expansion and contraction is large, causing cracks in the lens, etc., making it impossible to secure the lens shape accuracy.

A lens that does not satisfy the conditions of the imaging lens according to the present embodiment as in the specific example 6 has poor aberration performance and is not preferable in terms of securing the lens shape accuracy. As described above, in the first embodiment, since the lens that forms the subject image on the CCD 14 is formed using a material that shields the infrared region, there is no need to separately provide an infrared cut-in filter. By processing only one member, an optical system having one function of an infrared cut filter can be constituted by the imaging lens alone, and the cost can be reduced.

(Embodiment 2)

Next, an imaging lens according to Embodiment 2 of the present invention will be described. FIG. 2 is a diagram showing an image pickup unit centered on an aspherical zoom lens which is an image pickup lens according to Embodiment 2. FIG. 3 is a diagram illustrating a configuration. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and 22 denotes a convex lens, which is a lens material that absorbs an infrared region as in the first embodiment. On the surface 22a on the object (subject) side, a phase grating 210 having a function of an optical low-pass filter and having a structure periodic in one direction is formed. With this configuration, a single convex lens 22 having an infrared shielding function and suppressing an image high-frequency component can be realized.

The convex lens 222 preferably has a lens surface on the image plane side that satisfies the above-described conditional expression (3), as in the first embodiment. It is preferable that the lens surface from which the periodic structure is removed satisfies the above-mentioned conditional expressions (1) and (2). Further, it is preferable that the phase grating 210 has a periodic structure having a trapezoidal cross section along a lens surface shape satisfying the conditional expressions (1) and (2). The phase grating 210 is preferably formed on the surface 22a on the object (subject) side of the convex lens 22 because the lens has a smaller curvature and is easier to manufacture. May be formed on the lens surface 22 b on the image plane side.

Also, as in the first embodiment, the convex lens 22 is preferably manufactured by press molding for transferring the shape of a mold in order to manufacture an ultra-small deformed lens at low cost.

Further, similarly to the first embodiment, an anti-reflection film may be coated on both surfaces of the lens 22 to improve the transmittance and protect the lens surface. In addition, the image pickup device (CCD 14) is sealed with a convex lens 22 and a holder member (not shown) integrated with the convex lens 22, thereby reducing the size of the entire image pickup unit. Can be planned.

As described above, according to the second embodiment, the lens 22 for imaging the subject image on the CCD 14 is formed using a material that shields the infrared region, and the lens surface 22 on the subject side is formed. Since a phase grating 210 is formed on a, an optical system having the functions of an infrared cut filter and an optical low-pass filter can be formed by a single imaging lens by processing only one component. However, lower prices can be realized.

In particular, the infrared shielding material is required to have a certain thickness because the infrared shielding effect is weakened when the material is made thinner. Since the convex lens itself having a required lens thickness required for the image action becomes unnecessary because it is made of a material for shielding infrared rays, the imaging lens of the second embodiment is ultra-thin and has a simple configuration. It can be.

Further, by using the imaging lens having the above configuration, it is possible to realize an ultra-compact and inexpensive electronic device for information equipment.

(Embodiment 3)

Next, an imaging lens unit according to a third embodiment of the present invention will be described. FIG. 3 is a diagram showing an example in which an aspherical zoom lens as an imaging lens according to the third embodiment is united. In the figure, 31 is a convex lens having a phase grating 310 on the lens surface on the subject side, 32 is a CCD which is an image sensor, and the convex lens 31 and the CCD 32 are holder members 33. The structure is such that the space between the convex lens 31 and the CCD 32 is sealed. Gas is sealed in the sealed space 34 to prevent dew condensation and the like.

In the third embodiment described above, a face plate is necessary to protect the surface of the CCD. Compared with the first and second embodiments, the face plate for the CCD is not required, and the size can be further reduced.

(Embodiment 4)

Next, an electronic camera according to a fourth embodiment of the present invention will be described. FIG. 4 shows an example of an electronic camera using an imaging lens according to the fourth embodiment. The fourth embodiment includes an imaging unit 41 including the imaging lens described in the first and second embodiments or the imaging lens unit described in the third embodiment, a CCD 42 serving as an imaging device, A signal processing circuit 43 for processing the image signal obtained by the CCD 42. As described above, by using an imaging lens or an imaging lens unit capable of reducing the size and thickness of the optical system, an ultra-compact electronic camera can be realized.

Furthermore, if a CMOS sensor is used as the image sensor, a photoelectric conversion system including the CCD 42 and the signal processing circuit 43 can be configured on one chip, and the size can be further reduced. Industrial applicability

As described above, according to the imaging lens of the present invention, the entire lens can be reduced in size and thickness, and the price can be reduced. In particular, an imaging device serving as a video input unit of an information device such as a mobile phone or a PDA. use number ί straight force ^s I¾ Rere as an imaging lens for an electronic camera using a.

Claims

The scope of the claims

1. In an imaging lens that forms a subject image on an image sensor,

The imaging lens is constituted by a convex lens formed using a material that blocks light in an infrared region,

An imaging lens, characterized in that:

2. In the imaging lens according to claim 1,

An aperture is provided on the subject side relative to the convex lens constituting the imaging lens,

The focal length f of the convex lens and the radius of curvature r 1 of the convex lens on the object side are -2.0 << / r 1 <0

Satisfying the conditions of

An imaging lens, characterized in that:

3. In the imaging lens according to claim 1 or 2,

The convex lens constituting the imaging lens has an aspherical lens surface on the subject side,

The local radius of curvature R 10 near the optical axis of the lens surface of the convex lens on the subject side and the local radius of curvature R 11 of the outer peripheral portion thereof are:

| R 1 11 / l R l O | <0.4

Satisfying the conditions of

An imaging lens, characterized in that:

4. The imaging lens according to any one of claims 1 to 3, wherein a convex lens constituting the imaging lens has an aspherical lens surface on an image surface side, and an image surface side of the convex lens. The local radius of curvature R 20 near the optical axis of the lens surface of the lens and the local radius of curvature R 21 of the outer peripheral portion thereof are:

0.7 <<| R2 1 | / | R 20 | <1.2

Satisfying the conditions of

An imaging lens, characterized in that:

5. The imaging lens according to any one of claims 1 to 4, wherein the convex lens constituting the imaging lens has one of a subject side and an image plane side. An imaging lens, wherein a phase grating having an action of an optical low-pass filter is formed.

6. The imaging lens according to claim 5,

The phase grating is formed on the object-side surface of the convex lens in a structure that is periodic in at least one direction.

An imaging lens characterized by the following:

7. The imaging lens according to any one of claims 1 to 6, wherein an anti-reflection film is formed on both the object side and the image plane side of the convex lens constituting the imaging lens, An imaging lens, characterized in that:

8. In an imaging unit having an imaging element and an imaging lens that forms a subject image on the imaging element,

The imaging lens is the imaging lens according to any one of claims 1 to 7,

An imaging unit, comprising: a holder member that holds the imaging lens and seals the imaging element.

9. An image pickup lens according to any one of claims 1 to 7,

An electronic camera, characterized in that:

10. An imaging unit according to claim 8,

An electronic camera, characterized in that: