WO2011052159A1 - Lentille d'achromatisation - Google Patents

Lentille d'achromatisation Download PDF

Info

Publication number
WO2011052159A1
WO2011052159A1 PCT/JP2010/006211 JP2010006211W WO2011052159A1 WO 2011052159 A1 WO2011052159 A1 WO 2011052159A1 JP 2010006211 W JP2010006211 W JP 2010006211W WO 2011052159 A1 WO2011052159 A1 WO 2011052159A1
Authority
WO
WIPO (PCT)
Prior art keywords
base material
substrate
achromatic lens
lens
interface
Prior art date
Application number
PCT/JP2010/006211
Other languages
English (en)
Japanese (ja)
Inventor
尚志 後藤
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Publication of WO2011052159A1 publication Critical patent/WO2011052159A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0025—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having one lens only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration

Definitions

  • the present invention relates to an achromatic lens capable of suppressing chromatic aberration generated when used at a plurality of wavelengths.
  • the lens is well known as an optical element that forms an image by refracting incident light and collecting or spreading the light.
  • Optical glass and various resins are used for the optical material used for this lens, but since these optical materials have characteristics that the refractive index differs depending on the wavelength, the deviation of the condensing position between the wavelengths when condensing, that is, Chromatic aberration occurs.
  • Patent Document 1 proposes that an ultraviolet curable resin is disposed between glass substrates to correct chromatic aberration.
  • Patent Document 2 proposes that chromatic aberration correction using a diffractive surface is effectively performed by using a diffractive optical element.
  • JP 2006-349947 A Japanese Patent No. 3717555
  • Patent Document 1 proposes that an ultraviolet ray curable resin is disposed between glass substrates to correct chromatic aberration.
  • the bonded optical element becomes thick, and there is a problem that it is difficult to make the optical element thin especially when the outer diameter is reduced. This is due to the fact that in manufacturing a glass lens with a reduced outer diameter, a certain amount of required inner wall thickness and edge thickness must be secured. This problem is also inherent in the case of using not only a glass lens but also a resin lens by injection molding.
  • Patent Document 2 proposes that chromatic aberration correction is effectively performed by employing an optical material that satisfies a predetermined condition for the diffractive optical element.
  • the lens since the lens is made of glass or resin by injection molding, the thickness of the entire optical element is increased as in Patent Document 1. Since the chromatic aberration correction surface is limited to one surface, it is difficult to perform effective aberration correction.
  • the present invention has been made paying attention to the above-mentioned problems, and proposes an optical element that can effectively correct chromatic aberration within a limited thickness.
  • the achromatic lens of the present invention is any one of the following.
  • the first configuration of the achromatic lens of the present invention includes a transparent first base material, a transparent second base material joined to the first base material, and the second base material sandwiched between the first base material and the second base material. And a transparent third substrate bonded to the opposite side of the first substrate and a transparent third substrate bonded to the opposite side of the second substrate across the third substrate.
  • the second base material is a positive lens
  • the third base material is a negative lens
  • the first base material and the second base material are ,
  • the refractive index for at least one wavelength is different
  • the second base material and the third base material have different Abbe numbers
  • the third base material and the fourth base material are at least one wavelength.
  • the second base material is an energy curable resin
  • the third base material is an energy curable resin. Is shall.
  • the second configuration of the achromatic lens of the present invention is characterized in that the following conditional expression (1) is satisfied in the first configuration. 0.008 ⁇
  • the third configuration of the achromatic lens of the present invention is characterized in that, in the first or second configuration, the following conditional expression (2) is satisfied.
  • an interface between the second base material and the third base material forms a relief pattern. It is a diffractive optical surface.
  • the fifth configuration of the achromatic lens according to the present invention is characterized in that, in the fourth configuration, the following conditional expressions (3) and (4) are satisfied.
  • n1 ( ⁇ ) is the refractive index of the second substrate
  • n2 ( ⁇ ) is the refractive index of the third substrate
  • ⁇ 1 ⁇ ⁇ 2, and ⁇ 1 and ⁇ 2 are arbitrary light wavelengths.
  • the energy curable resin used for the second base material or the third base material is light. It is a curable resin.
  • a seventh configuration of the achromatic lens according to the present invention is the same as any one of the first to sixth configurations, the interface between the first base material and the second base material, or the third base material. And at least one of the interfaces of the fourth base material is provided with a light shielding portion.
  • At least one of the first base material and the fourth base material is configured by a plane parallel plate. It is characterized by being.
  • the ninth configuration of the achromatic lens according to the present invention is characterized in that, in any one of the first to eighth configurations, the following conditional expression (5) is satisfied. ⁇ 1, ⁇ 4 ⁇ 0.1 [%] (5) here, ⁇ 1 is the water absorption rate of the first substrate, ⁇ 4 is the water absorption rate of the fourth substrate, It is.
  • FIG. 6 is a diagram for explaining a manufacturing process of the achromatic lens according to the first embodiment of the present invention.
  • FIG. 6 is a diagram for explaining a manufacturing process of the achromatic lens according to the first embodiment of the present invention.
  • the configuration of the first achromatic lens of the present embodiment includes a transparent first base material, a transparent second base material joined to the first base material, and a second base material sandwiched therebetween.
  • a transparent third substrate bonded to the opposite side of the first substrate, and a transparent fourth substrate bonded to the opposite side of the second substrate across the third substrate;
  • the second substrate is a positive lens
  • the third substrate is a negative lens
  • the first substrate and the second substrate have a refractive index with respect to at least one wavelength.
  • the second substrate and the third substrate have different Abbe numbers
  • the third substrate and the fourth substrate have different refractive indices for at least one wavelength
  • the second substrate has It is an energy curable resin
  • the third base material is an energy curable resin.
  • the achromatic lens According to the first configuration of the achromatic lens, it is possible to effectively correct chromatic aberration mainly at the interface between the second base material and the third base material. It is also possible to correct various aberrations at the interface between the first base material and the second base material, and at the interface between the third base material and the fourth base material. Therefore, the performance of the entire optical system incorporating this achromatic lens can be improved.
  • the second base material and the third base material are made of energy curable resin, the edge thickness of the second base material constituting the positive lens, and the third lens constituting the negative lens Since the inner thickness of the base material can be formed extremely thin, the entire achromatic lens can be reduced in thickness. Such a thin achromatic lens is particularly convenient when applied to an imaging optical system for photographing a small area.
  • the configuration of the second achromatic lens of the present embodiment is characterized in that the following conditional expression (1) is satisfied. 0.008 ⁇
  • the configuration of the third achromatic lens of the present embodiment is characterized in that the following conditional expression (2) is satisfied. 0.05 [mm] ⁇ (d2 + d3) ⁇ 1.00 [mm] (2) here, d2 is the thickness of the second base material, d3 is the thickness of the third base material, It is.
  • conditional expression (2) When the lower limit value of conditional expression (2) is not reached, it is difficult to secure the respective powers of the second base material and the third base material, so that a sufficient chromatic aberration correction effect cannot be obtained. Further, when the upper limit value of the conditional expression (2) is exceeded, the achromatic lens becomes thick, so that the merit of using the energy curable resin is diminished.
  • the fourth achromatic lens structure of the present embodiment is characterized in that it is a diffractive optical surface formed with a relief pattern.
  • the diffractive optical surface forming the relief pattern has a value of ⁇ 3.45 when converted to the Abbe number. Therefore, chromatic aberration can be corrected more favorably by using a diffractive optical surface.
  • the diffractive optical surface for example, by setting the refractive indexes of the first base material and the fourth base material to appropriate values, it is possible to improve chromatic aberration correction in a wider wavelength range. It becomes possible.
  • the configuration of the fifth achromatic lens of the present embodiment is characterized in that the following conditional expressions (3) and (4) are satisfied.
  • n1 ( ⁇ ) is the refractive index of the second substrate
  • n2 ( ⁇ ) is the refractive index of the third substrate
  • ⁇ 1 ⁇ ⁇ 2 and ⁇ 1 and ⁇ 2 are arbitrary light wavelengths, It is.
  • T 2 > 4 ⁇ d / ⁇ n1 ( ⁇ ) + n2 ( ⁇ ) ⁇ here, d is the groove depth of the relief pattern, T is the pitch of the periodic structure of the relief pattern, However, ⁇ 1 ⁇ ⁇ 2, It is.
  • the configuration of the sixth achromatic lens of the present embodiment is characterized in that the energy curable resin used for the second substrate or the third substrate is a photocurable resin.
  • the reason and action of adopting the sixth configuration of the achromatic lens will be described.
  • an energy curable resin for the second base material or the third base material.
  • a photocurable resin as the energy curable resin.
  • thermosetting resin that is one of energy curable resins
  • the seventh achromatic lens of the present embodiment is configured to shield light from at least one of the interface between the first substrate and the second substrate, or the interface between the third substrate and the fourth substrate. It is characterized by providing a section.
  • a light blocking portion for reducing unnecessary light is provided at an appropriate interface.
  • unnecessary light can be reduced, and the contrast of the achromatic lens can be significantly improved.
  • the light-shielding part is provided as another member pinched
  • the shape of the light shielding portion can be an arbitrary shape according to the form of unnecessary light.
  • the configuration of the eighth achromatic lens of the present embodiment is characterized in that at least one of the first base material and the fourth base material is formed of a parallel plane plate.
  • the configuration of the ninth achromatic lens of the present embodiment is characterized in that the following conditional expression (5) is satisfied. ⁇ 1, ⁇ 4 ⁇ 0.1 [%] (5) here, ⁇ 1 is the water absorption rate of the first substrate, ⁇ 4 is the water absorption rate of the fourth substrate, It is.
  • the reason and action of adopting the ninth configuration of the achromatic lens will be described.
  • the conditional expression (5) is satisfied, the aberration fluctuation accompanying the change in humidity can be suppressed even when the energy-curable resin having a high water absorption rate is used for the second base material or the third base material. That is, since the water absorption rate of the first base material and the fourth base material is low, the influence of humidity can be prevented from reaching the second base material and the third base material.
  • the first base material and the fourth base material itself it is possible to suppress fluctuations in aberrations accompanying changes in humidity.
  • conditional expression (5) If the upper limit value of conditional expression (5) is exceeded, the shape of the first to fourth substrates changes according to the change in humidity, resulting in aberration fluctuations.
  • FIG. 1 is a cross-sectional view taken along the optical axis of the outline of the achromatic lens in Example 1 of the present invention.
  • a first base material L11, a second base material L12, a third base material L13, and a fourth base material L14 are arranged in order from the A side to the B side. It is configured.
  • Each of the base materials L11 to L14 forms five interfaces r11 to r15 in order from the A side to the B side. It is arbitrary whether the A side is the object side and the B side is the emission side, or the A side is the emission side and the B side is the object side.
  • the first base material L11 is a plano-concave lens having a concave surface facing the A side and a flat surface facing the B side, that is, the adjacent second base material L12 side, and a glass base material is adopted as the material thereof. ing.
  • the second base material L12 is a plano-convex lens having a flat surface facing the A side, that is, the adjacent first base material L11 side, and a convex surface facing the B side, that is, the adjacent third base material L13. Therefore, an epoxy-based photocurable resin is adopted as the base material.
  • the third base material L13 is a plano-concave lens having a concave surface facing the A side, that is, the adjacent second base material L12 side, and a flat surface facing the B side, that is, the adjacent fourth base material L14. Therefore, an epoxy-based photocurable resin is adopted as the base material.
  • the fourth base material L14 is a plano-convex lens having a flat surface facing the A side, that is, the adjacent third base material L13 side, and a convex surface facing the B side, and a glass base material is adopted as the base material. is doing.
  • Example 1 the convex surface of the second base material L12 and the concave surface of the third base material L13 were combined, and an energy curable resin such as a photocurable resin was used for these two base materials.
  • an energy curable resin such as a photocurable resin was used for these two base materials.
  • the first base material L11 and the fourth base material L14 can select materials having a relatively wide refractive index, various aberrations at the reference wavelength can be effectively corrected.
  • chromatic aberration can also be corrected at the interface r12 between the first base material L11 and the second base material L12 and at the interface r14 between the third base material L13 and the fourth base material L14.
  • Example 1 the corresponding value of conditional expression (1) is 0.011, and the corresponding value of ⁇ 1 and ⁇ 4 is almost zero.
  • the second base material L12 and the third base material L13 are energy curable resins such as a photo-curing resin
  • the first base material L11 and the fourth base material L14 are glass base materials or injection molding. If it is a resin base material by, it will not specifically limit.
  • Example 1 The numerical data of Example 1 is shown below.
  • nd is the refractive index of the d-line of each substrate (optical medium)
  • ⁇ d is the Abbe number of each substrate.
  • the Abbe number of the second base material L12 and the third base material satisfies the conditional expression (1) (corresponding value is 0.011), and has sufficient chromatic aberration correction capability. Yes.
  • Example 1 Base material number nd ⁇ d L11 1.717 30 L12 1.514 58 L13 1.573 35 L14 1.65 59
  • FIG. 2 and 3 are diagrams showing an embodiment of the manufacturing process of the achromatic lens in Example 1.
  • FIG. achromatic lenses are manufactured in the order of (1) to (6).
  • the first mold K1 is fitted into the first base material L11.
  • the surface of the first base L11 facing the first mold K1 is an interface r12 formed between the first base L11 and the second base L12 in the completed achromatic lens. It is formed in the same shape.
  • the surface of the first mold K1 facing the first base material L11 is the same as the interface r13 formed between the second base material L12 and the third base material L13 in the completed achromatic lens. It is formed to have a shape or substantially the same shape.
  • an epoxy-based photocurable resin is injected into the formed gap from an appropriate injection port (not shown) provided in the first mold K1, and is formed of a transparent glass substrate.
  • ultraviolet light is irradiated from the first base material L11 side, and the photocurable resin filled in the gap is cured on the first base material L11.
  • the photocurable resin is injected from the injection port provided in the first mold K1, but before the first base material L11 is fitted into the first mold K1, the photocurable mold is used. It is good also as filling with resin. In this way, the step of removing burrs formed at the injection port of the first mold K1 becomes unnecessary.
  • (3) is a view showing a state of being cured in the step (2).
  • An interface r12 is formed between the first base material L11 and the second base material L12. Further, the surface on which the second base L12 faces the first first mold K1 has the same shape as the interface r13 in the completed achromatic lens, depending on the shape of the first mold K1, or It is formed to have substantially the same shape. Further, by polishing the exposed surface of the second base material L12, it is possible to improve the accuracy of the interface r13.
  • the second base material L12 by forming the second base material L12 with a photocurable resin, it is possible to form the rim portion (the peripheral end portion indicated by E in the drawing) of the second base material L12 extremely thin. Thus, the thickness of the entire achromatic lens can be suppressed. Further, when the exposed surface of the second base material L12 is polished, the second base material L12 can be polished in a state where the first base material L11 is supported, so that the rim portion is processed thinly. It becomes possible.
  • the fourth base material is spaced apart from the second base material L12 by a predetermined distance with respect to the set of the first base material L11 and the second base material L12 formed in (3).
  • Install L14 The installation is performed using a second mold K2 that surrounds each substrate. At that time, the surface of the fourth base material L14 facing the second base material L12 is formed in the same shape as the interface r14 in the completed achromatic lens. The gap formed between the second base material L12 and the fourth base material L14 has the same shape as the third base material L13.
  • an epoxy-based photocurable resin is injected into the formed gap from an appropriate injection port (not shown) provided in the second mold K2, and is formed of a transparent glass substrate.
  • ultraviolet light is irradiated from the first base material L11 side, and the photocurable resin filled in the gap is cured on the second base material L12 and the fourth base material L14.
  • the photocurable resin is filled in advance between the second base material L12 and the fourth base material L14. Also good.
  • the ultraviolet light irradiation is performed from the third base material L14 side, or from the first base material L11 side, the third base material L14 side. It is good also as performing from both the base-material L14 side. When ultraviolet light is irradiated from both, the curing time can be shortened.
  • (6) shows the completed achromatic lens.
  • (4) In the process of (5), by using a photocurable resin for the third base material L13 and curing it in a state sandwiched between the second base material L12 and the fourth base material L14, It is possible to form a very thin inner portion (thickness in the vicinity of the optical axis indicated by T in the drawing) of the third base material L13.
  • the overall thickness is obtained by combining the convex surface of the second base material constituting the positive lens and the concave surface of the third base material constituting the negative lens. Can be suppressed.
  • the edge part E of the 2nd base material L12 and the middle part T of the 3rd base material L13 by using photocurable resin for the 2nd base material L12 and the 3rd base material L13 It becomes possible to form very thinly compared with the case where each forms independently. Further, since only one mold (first mold K1) is sufficient to form an interface for the mold, the manufacturing process can be simplified.
  • the manufacturing process of the achromatic lens of this embodiment shows an example, and the selection of the material as the energy curable resin can be appropriately performed. Moreover, also about the order of a process, after hardening and forming the 3rd base material L13, it is good also as hardening and forming the 2nd base material L12.
  • FIG. 4 is a cross-sectional view taken along the optical axis of the outline of the achromatic lens in Example 2 of the present invention.
  • a first base material L21, a second base material L22, a third base material L23, and a fourth base material L24 are arranged in order from the A side to the B side. It is configured.
  • Each of the base materials L21 to L24 forms five interfaces r21 to r25 in order from the A side to the B side. It is arbitrary whether the A side is the object side and the B side is the emission side, or the A side is the emission side and the B side is the object side.
  • the first base material L21 is a plano-convex lens having a convex surface directed to the A side and a flat surface directed to the B side, that is, the adjacent second base material L22 side, and a cycloolefin polymer is adopted as the material thereof. ing.
  • the second base material L22 is a plano-convex lens having a flat surface facing the A side, that is, the adjacent first base material L21 side, and a convex surface facing the B side, that is, the adjacent third base material L23. Therefore, an epoxy-based cured resin is adopted as the base material.
  • the third base material L23 is a plano-concave lens having a concave surface facing the A side, that is, the adjacent second base material L22 side, and a flat surface facing the B side, that is, the adjacent fourth base material L24 side. Therefore, an epoxy-based cured resin is adopted as the base material.
  • the fourth base material L24 is a plano-convex lens having a flat surface facing the A side, that is, the adjacent third base material L23 side, and a convex surface facing the B side, and a cycloolefin polymer is adopted as the base material. is doing.
  • Example 2 The numerical data of Example 2 is shown below.
  • nd is the refractive index of the d-line of each substrate (optical medium)
  • ⁇ d is the Abbe number of each substrate.
  • the Abbe number of the second base material L12 and the third base material satisfies the conditional expression (1) (corresponding value is 0.011), and has sufficient chromatic aberration correction capability.
  • the corresponding values of the water absorption rates ⁇ 1 and ⁇ 4 of the first base material L21 and the fourth base material L41 are 0.01 or less, and the second base material L22 and the third base material L23 are removed from moisture. Sufficient protection is possible.
  • FIG. 5 is a cross-sectional view taken along the optical axis of the outline of the achromatic lens in Example 3 of the present invention.
  • the third embodiment is a modification of the second embodiment.
  • the interface r32 between the first base material L31 and the second base material L32 has a shape with a convex surface facing the A side.
  • the interface r34 between the third base material L33 and the fourth base material L34 has a convex surface facing the B side.
  • the interface r32 between the first base material L31 and the second base material L32 and the interface r34 between the third base material L33 and the fourth base material L34 may be appropriately curved. According to such a configuration of the achromatic lens, it is possible to increase the degree of freedom in correcting various aberrations.
  • FIG. 6 is a cross-sectional view taken along the optical axis of the outline of the achromatic lens of Example 4 of the present invention.
  • the shape is the same as that of Example 2, but the interface r43 between the second base material L42 and the third base material L43 is a diffractive optical surface formed by forming a relief pattern. Is different.
  • Example 4 Substrate number n1 (404.66) n2 (486.13) n3 (587.56) n4 (656.27) ⁇ d L42 1.63977 1.626 1.60999 1.6038 27 L43 1.66194 1.65086 1.63762 1.63222 27
  • the material of the second base material L42 and the third base material L43 is not limited to the acrylic curable resin, and may be an energy curable resin that satisfies the conditional expression (4).
  • the first base material L41 and the fourth base material L43 may be made of a glass base material or a resin lens by injection molding.
  • FIG. 7 is a cross-sectional view taken along the optical axis of the outline of the achromatic lens in Example 5 of the present invention.
  • a first base material L51, a second base material L52, a third base material L53, and a fourth base material L54 are arranged in order from the A side to the B side. It is configured.
  • Each of the base materials L51 to L54 forms five interfaces r51 to r55 in order from the A side to the B side. It is arbitrary whether the A side is the object side and the B side is the emission side, or the A side is the emission side and the B side is the object side.
  • the first base material L51 is a parallel flat plate having a planar shape on both the A side and the B side and a thickness of 0.4 [mm], and a glass base material is adopted as the material thereof. .
  • the second base material L52 is a plano-convex lens having a flat surface facing the A side, that is, the adjacent first base material L51 side, and a convex surface facing the B side, that is, the adjacent third base material L53 side. Therefore, an epoxy-based cured resin is adopted as the base material.
  • the medium thickness (distance between the interfaces r52 and r53 on the optical axis) is 0.3 [mm], and the radius of curvature at the interface r53 is 8 [mm].
  • the third base material L53 is a plano-concave lens having a concave surface facing the A side, that is, the adjacent second base material L52 side, and a flat surface facing the B side, that is, the adjacent fourth base material L54 side. Therefore, an epoxy-based cured resin is adopted as the base material.
  • the medium thickness (distance between the interfaces r53 and r54 on the optical axis) is 0.1 [mm], and the radius of curvature at the interface r53 is 8 [mm].
  • the fourth base material L54 is a plane parallel plate having a planar shape on both the A side and the B side and a thickness of 0.4 [mm], and a glass base material is adopted as the material thereof. .
  • the total thickness of the achromatic lens can be formed as extremely thin as 1.2 [mm].
  • the effective diameter of the achromatic lens is 4 [mm].
  • the first base material L51 and the fourth base material L54 are parallel flat plates, the centering process for each base material can be simplified and thinned.
  • the second base material L52 and the third base material L53 are made of a photo-curing resin, so that the thickness of the medium thickness and the edge thickness can be reduced, and the thickness of the entire achromatic lens can be suppressed. .
  • the materials of the first base material L51 and the second base material L52, and the third base material L53 and the fourth base material L54 have different Abbe numbers. As a result, it is possible to correct chromatic aberration also at the interfaces r52 and r54.
  • Example 5 The numerical data of Example 5 is shown below.
  • nd is the refractive index of the d-line of each substrate (optical medium)
  • ⁇ d is the Abbe number of each substrate. Note that the material, thickness, and radius of curvature are not limited to the numerical values of the present embodiment, and can be selected corresponding to the optical system to be used as appropriate.
  • FIG. 8 is a cross-sectional view taken along the optical axis of the outline of the achromatic lens of Example 6 of the present invention.
  • the shape is the same as that of Example 5, but the interface r63 between the second base material L62 and the third base material L63 is a diffractive optical surface formed by forming a relief pattern. Is different.
  • n1 to n4 are refractive indexes at wavelengths (unit: [nm]) shown in parentheses, and ⁇ d is an Abbe number.
  • conditional expression (4) is satisfied, and it is possible to effectively correct chromatic aberration in the photographing optical system.
  • Example 6 Substrate number n1 (404.66) n2 (486.13) n3 (587.56) n4 (656.27) ⁇ d L62 1.63977 1.626 1.60999 1.6038 27 L63 1.66194 1.65086 1.63762 1.63222 27
  • the interface between the second base material L62 and the third base material L63 is a diffractive optical surface, but macroscopically has a shape with a radius of curvature of 40 [mm].
  • the thickness of the second substrate L62 having a convex surface on the B side is 0.1 [mm]
  • the thickness of the third substrate L63 (optical axis).
  • the distance between the upper interfaces r63 and r64) is 0.05 [mm].
  • the first base material L61 and the second base material L62 are glass base materials having a refractive index nd of 1.516 and an Abbe number ⁇ d of 64, and each thickness is 0.4 [mm]. It is. Therefore, the total thickness of the achromatic lens is 0.95 [mm].
  • the effective diameter of this achromatic lens is 4 [mm].
  • FIG. 9 is a cross-sectional view taken along the optical axis by developing an outline of the achromatic lens in Example 7 of the present invention.
  • the achromatic lens shown in this figure is the same as the achromatic lens having the configuration of Example 5 described in FIG. 7 except that a zeroth base material L70 is added to the A side and a fifth base material L75 is added to the B side. It has become.
  • the 0th base material L70 is a plano-convex lens having a convex surface facing the A side and a flat surface facing the B side, that is, the adjacent first base material L70 side, and the material thereof is an epoxy photocurable resin. Is adopted.
  • the fifth base material L75 is a plano-convex lens having a convex surface facing the B side and a flat surface facing the A side, that is, the adjacent fourth base material L74 side, and is made of an epoxy-based photocurable resin. Is adopted.
  • Example 7 The numerical data of Example 7 is shown below.
  • nd is the refractive index of the d-line of each substrate (optical medium)
  • ⁇ d is the Abbe number of each substrate.
  • Example 7 Base material number nd ⁇ d L70 1.514 58 L71 1.516 64 L72 1.51458 58 L73 1.573 35 L74 1.516 64 L75 1.514 58
  • the 0th base material and the fifth base material made of the energy curable resin are further formed on the optical element surface formed by the first to fourth base materials, so that the thickness is not greatly changed. It is also possible to form an achromatic lens that enhances the light condensing action and the aberration correction power.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

La présente invention a trait à une lentille mince d'achromatisation qui a une grande capacité de correction de l'aberration chromatique. La lentille d'achromatisation comprend au moins un premier substrat (L11), un deuxième substrat (L12) réuni avec le premier substrat (L11), un troisième substrat (L13) réuni avec le deuxième substrat (L12) sur le côté opposé audit premier substrat (L11), et un quatrième substrat transparent (L14) réuni avec le troisième substrat (L13) sur le côté opposé audit deuxième substrat (L12). Le deuxième substrat (L12) est une lentille positive et le troisième substrat (L13) est une lentille négative. Les indices de réfraction du premier substrat (L11) et du deuxième substrat (L12) sont différents pour au moins une longueur d'onde. Les nombres d'Abbe du deuxième substrat (L12) et du troisième substrat (L13) sont différents. Les indices de réfraction du troisième substrat (L13) et du quatrième substrat (L14) sont différents pour au moins une longueur d'onde. Le deuxième substrat (L12) et le troisième substrat (L13) sont une résine durcissable par application d'énergie.
PCT/JP2010/006211 2009-10-26 2010-10-20 Lentille d'achromatisation WO2011052159A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-245069 2009-10-26
JP2009245069A JP2011090235A (ja) 2009-10-26 2009-10-26 色消しレンズ

Publications (1)

Publication Number Publication Date
WO2011052159A1 true WO2011052159A1 (fr) 2011-05-05

Family

ID=43921596

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/006211 WO2011052159A1 (fr) 2009-10-26 2010-10-20 Lentille d'achromatisation

Country Status (2)

Country Link
JP (1) JP2011090235A (fr)
WO (1) WO2011052159A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107894651A (zh) * 2017-12-18 2018-04-10 苏州灵猴机器人有限公司 机器视觉检测镜头
CN114063257A (zh) * 2021-11-25 2022-02-18 福建师范大学 一种广角大光圈消热差定焦安防镜头
CN115079379A (zh) * 2022-06-17 2022-09-20 湖南长步道光学科技有限公司 一种可见-近红外光学系统及光学镜头

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107748429B (zh) * 2017-10-24 2023-09-26 辽宁中蓝光电科技有限公司 一种大光圈短ttl的5片式光学系统及光学镜头
CN109143547B (zh) * 2018-09-07 2020-11-20 北京点阵虹光光电科技有限公司 一种宽光谱镜头

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005157120A (ja) * 2003-11-27 2005-06-16 Olympus Corp 光学系
WO2007145194A1 (fr) * 2006-06-14 2007-12-21 Konica Minolta Opto, Inc. Système optique de formation d'image, dispositif de lentille de formation d'image et appareil numérique
WO2008102773A1 (fr) * 2007-02-19 2008-08-28 Konica Minolta Opto, Inc. Lentille et dispositif d'imagerie, terminal portable et procédé de fabrication de lentille d'imagerie
WO2009014021A1 (fr) * 2007-07-20 2009-01-29 Nikon Corporation Système optique diffractif et système optique à oculaire
WO2009081831A1 (fr) * 2007-12-20 2009-07-02 Nikon Corporation Système oculaire et dispositif optique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005157120A (ja) * 2003-11-27 2005-06-16 Olympus Corp 光学系
WO2007145194A1 (fr) * 2006-06-14 2007-12-21 Konica Minolta Opto, Inc. Système optique de formation d'image, dispositif de lentille de formation d'image et appareil numérique
WO2008102773A1 (fr) * 2007-02-19 2008-08-28 Konica Minolta Opto, Inc. Lentille et dispositif d'imagerie, terminal portable et procédé de fabrication de lentille d'imagerie
WO2009014021A1 (fr) * 2007-07-20 2009-01-29 Nikon Corporation Système optique diffractif et système optique à oculaire
WO2009081831A1 (fr) * 2007-12-20 2009-07-02 Nikon Corporation Système oculaire et dispositif optique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107894651A (zh) * 2017-12-18 2018-04-10 苏州灵猴机器人有限公司 机器视觉检测镜头
CN114063257A (zh) * 2021-11-25 2022-02-18 福建师范大学 一种广角大光圈消热差定焦安防镜头
CN114063257B (zh) * 2021-11-25 2023-05-09 福建师范大学 一种广角大光圈消热差定焦安防镜头
CN115079379A (zh) * 2022-06-17 2022-09-20 湖南长步道光学科技有限公司 一种可见-近红外光学系统及光学镜头

Also Published As

Publication number Publication date
JP2011090235A (ja) 2011-05-06

Similar Documents

Publication Publication Date Title
US8767298B2 (en) Imaging lens
JP4673120B2 (ja) 回折光学素子及びこれを有する光学系
US9453986B2 (en) Imaging apparatus having a curved image surface
JP4817076B2 (ja) 回折光学素子
WO2011052159A1 (fr) Lentille d'achromatisation
JP4796660B2 (ja) ２枚組撮像光学系およびそれを備えた撮像装置
US9400396B2 (en) Diffractive optical element and image pickup optical system
JPWO2005111688A1 (ja) 投射レンズおよび背面投射型プロジェクション装置
JP2008242186A (ja) 回折光学素子及びそれを用いた光学系
JP2009217139A (ja) 回折光学素子、光学系及び光学機器
JP2009134223A (ja) 回折光学素子およびそれを有する光学系
JP6125796B2 (ja) 広角レンズおよび広角レンズユニット
JP5251517B2 (ja) 眼鏡レンズ
WO2008032447A1 (fr) Lentille photographique et caméra
JP5596859B2 (ja) 回折光学素子
JP5159998B2 (ja) 回折光学素子および内視鏡
JP2001033611A (ja) プラスチック製回折成形レンズ及び該レンズを用いた光学系
JP2015011293A (ja) 回折光学素子の製造方法
US20110317276A1 (en) Optical element and optical apparatus
JP2000098118A (ja) 回折光学素子及びこれを有する光学系
JPWO2012023275A1 (ja) 回折格子レンズおよびそれを用いた撮像装置
JP2012247450A (ja) 光学系
JP2013205534A (ja) 回折光学素子及びその製造方法並びに回折光学素子を用いた光学系
WO2020162094A1 (fr) Lentille à grand angle
JP2004126061A (ja) 回折光学素子及びこれを用いた光学系

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10826296

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10826296

Country of ref document: EP

Kind code of ref document: A1