WO2011158740A1 - Barillet de lentille et procédé d'assemblage de barillet de lentille - Google Patents

Barillet de lentille et procédé d'assemblage de barillet de lentille Download PDF

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Publication number
WO2011158740A1
WO2011158740A1 PCT/JP2011/063314 JP2011063314W WO2011158740A1 WO 2011158740 A1 WO2011158740 A1 WO 2011158740A1 JP 2011063314 W JP2011063314 W JP 2011063314W WO 2011158740 A1 WO2011158740 A1 WO 2011158740A1
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WO
WIPO (PCT)
Prior art keywords
lens frame
lens
lenses
lens barrel
optical axis
Prior art date
Application number
PCT/JP2011/063314
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English (en)
Japanese (ja)
Inventor
郁夫 滝
竜太 佐々木
Original Assignee
富士フイルム株式会社
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Filing date
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Application filed by 富士フイルム株式会社 filed Critical 富士フイルム株式会社
Publication of WO2011158740A1 publication Critical patent/WO2011158740A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
    • 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
    • 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
    • G02B13/004—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 four lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs

Definitions

  • the present invention relates to a lens barrel and a lens barrel assembling method.
  • a lens barrel in which a plurality of lenses are housed in a lens frame is generally used for a camera-equipped mobile phone camera or a vehicle-mounted camera.
  • Devices equipped with this lens barrel are often used in environments where temperature and humidity change. For example, an in-vehicle camera is exposed to a high temperature or a low temperature. Therefore, this lens barrel is required to have very high reliability, that is, performance stability and durability under severe environmental conditions such as high temperature / low temperature and temperature shock.
  • a sleeve having the same role a sleeve is formed by using a plurality of (for example, two) members having a fragment-like structure in which a tube-like structure is divided in advance along the extending direction, and covering the lens or the like with the members.
  • Patent Document 5 Has been proposed (see, for example, Patent Document 5).
  • the lens barrel body is a combination of half-divided half lens barrels.
  • the front surface of the cavity covers a part of the cavity, restricting the light passing through the lens to a predetermined amount and restricting excess light.
  • a lens barrel whose part is formed integrally with the lens barrel body (see, for example, Patent Document 6).
  • the clearance between the lens outer diameter and the lens frame inner diameter in a lens barrel in which a plurality of lenses are housed in a lens frame is generally a clearance of 20 ⁇ m or less so as not to cause a decrease in optical performance due to lens misalignment after assembly. Tolerance management is performed so that
  • the lens is made of glass and the lens frame is made of ceramic
  • the lens when the lens is incorporated into the lens frame, the lens is inserted in a posture in which the center is shifted or tilted. There is a risk of rubbing. Then, considering that the tolerance is controlled so that the clearance between the lens outer diameter and the lens frame inner diameter is 20 ⁇ m or less, it is extremely difficult to avoid such rubbing. Since both the glass lens and the ceramic lens frame are hard materials, scraping occurs when they are rubbed, and the scraping residue adversely affects the optical performance in the assembled lens barrel. .
  • the present invention provides a lens barrel and a method of assembling a lens barrel that avoids the occurrence of scraped debris during assembly and prevents deterioration of optical performance due to scraped debris in the assembled lens barrel. It is intended to provide.
  • the first lens barrel of the present invention that achieves the above object has a plurality of lenses and a hollow shape that is open at both the front end and the rear end in the optical axis direction.
  • the front end opening and the rear end The plurality of lenses formed by joining a plurality of lens frame pieces that are divided into a plurality of division surfaces that divide both the opening and the part and that each share a half or less area in the circumferential direction around the optical axis.
  • the front end and the rear end in the optical axis direction in the present invention distinguish one from the other at both ends in the optical axis direction. That is, the front end side and the rear end side include both cases corresponding to the subject side and the imaging side, and conversely, cases corresponding to the imaging side and the subject side, respectively.
  • the first lens barrel of the present invention is formed by connecting a hollow lens frame that is open at both ends in the optical axis direction and a plurality of lens frame pieces that are divided into a plurality of planes parallel to the optical axis. is there. Therefore, according to the lens barrel of the present invention, at the time of assembling the lens barrel, after arranging a plurality of lenses on the lens frame piece, they are joined to a lens frame shape in which the plurality of lenses are housed inside. be able to. Therefore, according to the first lens barrel of the present invention, when a plurality of lenses are accommodated in the lens frame, it is avoided that the two are rubbed and scraped off. For this reason, it is possible to prevent the optical performance from being deteriorated due to the scraped residue.
  • the lens frame is preferably made of ceramic.
  • the second lens barrel of the present invention that achieves the above object has a plurality of lenses and a hollow shape that is open at both the front end portion and the rear end portion in the optical axis direction.
  • the front end opening and the rear end A plurality of the above-mentioned plurality of ceramic lens frame pieces, which are divided into a plurality of dividing planes that divide both the opening and the part, and each of which divides a half or less area in the circumferential direction around the optical axis.
  • a ceramic adhesive that adheres the plurality of lens frame pieces to each other.
  • the second lens barrel of the present invention when a plurality of lenses are accommodated in the lens frame, it is avoided that the two are rubbed and scraped. For this reason, it is possible to prevent the optical performance from being deteriorated due to the scraped residue.
  • the lens barrel of the present invention is also preferably provided with a covering member that covers the contact portion between the lens frame pieces.
  • the lens frame having a hollow shape opened at both the front end portion and the rear end portion in the optical axis direction and accommodating a plurality of lenses
  • the plurality of lens frame pieces are divided into a plurality of division planes that divide both the front end opening and the rear end opening, and each of them divides a half or less area in the circumferential direction around the optical axis.
  • the plurality of lenses are arranged in one of the lens frame pieces, the lens frame pieces are connected to a lens frame shape in a state where the plurality of lenses are accommodated therein, and the lens frame pieces are assembled.
  • the front end portion and the rear end portion of the lens frame are respectively pressed by a front end pressing ring and a rear end pressing ring.
  • the first lens barrel assembling method of the present invention when a plurality of lenses are accommodated in the lens frame, it is avoided that the two are rubbed and scraped off. For this reason, in the assembled lens barrel, it is possible to prevent the optical performance from being deteriorated due to the scraped residue.
  • the lens frame having a hollow shape opened at both the front end portion and the rear end portion in the optical axis direction and accommodating a plurality of lenses, It consists of a plurality of ceramic lens frame pieces that are divided into a plurality of dividing planes that divide both the front end opening and the rear end opening, and each share a half or less area around the optical axis.
  • the plurality of lenses are arranged in one of the plurality of lens frame pieces, the lens frame pieces are connected to a lens frame shape in which the plurality of lenses are housed inside, and the plurality of lens frame pieces are attached. It is characterized by being bonded to each other with a ceramic adhesive.
  • the second lens barrel assembling method of the present invention it is possible to prevent the optical performance of the assembled lens barrel from being deteriorated due to scraps.
  • a lens barrel and a lens barrel assembly in which generation of scraps during assembly is avoided and optical performance is prevented from being deteriorated due to the scraps in the assembled lens barrel.
  • FIG. 2 is a perspective view of the lens barrel shown in FIG. 1. It is a longitudinal cross-sectional view parallel to the optical axis direction of the lens barrel shown in FIG. It is a longitudinal cross-sectional view parallel to the optical axis direction of the lens barrel which is 2nd Embodiment of the lens barrel of this invention. It is the perspective view which showed the lens barrel which is 3rd Embodiment of the lens barrel of this invention seeing from the to-be-photographed object side diagonally. It is a longitudinal cross-sectional view parallel to the optical axis direction of the lens barrel shown in FIG.
  • FIG. 1 is a perspective view showing a lens barrel 100, which is a first embodiment of the lens barrel of the present invention, as viewed obliquely from the subject side.
  • 2 is a perspective view of the lens barrel 100 shown in FIG. 1
  • FIG. 3 is a longitudinal sectional view parallel to the optical axis direction of the lens barrel 100 shown in FIG.
  • the lens barrel 100 of the first embodiment is formed by connecting four lenses 111, 112, 113, 114 and lens frame pieces 1210, 1220 divided into two.
  • the lens frame 120, the imaging side pressing ring 130, the subject side pressing ring 140, and the adhesive tape 150 are provided.
  • the subject side corresponds to an example of the front end side in the optical axis direction according to the present invention
  • the imaging side corresponds to an example of the rear end side in the optical axis direction according to the present invention.
  • the subject side pressing ring 140 corresponds to an example of a front end pressing ring referred to in the present invention
  • the imaging side pressing ring 130 corresponds to an example of a rear end pressing ring referred to in the present invention.
  • the four lenses 111, 112, 113, and 114 are glass lenses, and their optical axes are in order of the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114 from the imaging side. It is arranged to overlap.
  • Each of the lenses 111, 112, 113, and 114 has a disk shape, and the outer diameter (side surface) is not polished and has a slit surface of # 1000 or less. Since the side surface is a ground surface, adverse effects such as ghost are suppressed. The side surface is preferably # 300 or less for ease of processing.
  • These four lenses 111, 112, 113, and 114 correspond to an example of a plurality of lenses according to the present invention.
  • the lens frame 120 is a porous ceramic member having a hardness higher than that of the four lenses 111, 112, 113, 114.
  • the lens frame 120 is formed by joining lens frame pieces 1210 and 1220 together.
  • the lens frame 120 formed in this way is a hollow shape that accommodates the four lenses 111, 112, 113, and 114, and opens to both the subject side and the imaging side in the arrow A direction that is the optical axis direction. It has inner surfaces 1211, 1221 and outer surfaces 1212, 1222.
  • the inner surfaces 1211 and 1221 are arranged in order from the imaging side, and first positioning protrusions 12111 that determine the positions of the four lenses 111, 112, 113, and 114 in the direction of the arrow A that is the optical axis direction, respectively. , 12211, second positioning projections 12112, 12212, third positioning projections 12113, 12213, and fourth positioning projections 12114, 12214.
  • Each of the lens frame pieces 1210 and 1220 is divided into two by a dividing plane P that divides both the subject side and imaging side openings of the lens frame 120. More specifically, each of the two lens frame pieces 1210 and 1220 shares a half-circumferential region in the circumferential direction around the optical axis.
  • the lens frame 120 corresponds to an example of a lens frame according to the present invention.
  • the imaging-side holding ring 130 is a ceramic member made of the same material as the lens frame 120, for example, and has a substantially cylindrical shape. One open end has a shape protruding toward the center of the cylinder.
  • the imaging-side holding ring 130 holds the imaging-side end portions 1213 and 1223 of the lens frame 120 in a state where the lens frame pieces 1210 and 1220 are assembled. More specifically, the imaging-side holding ring 130 covers the imaging-side end portions 1213 and 1223 of the lens frame 120 and is fixed to the lens frame 120.
  • the imaging-side holding ring 130 may be fixed to the lens frame 120 by adhesion, or the inner circumference of the imaging-side holding ring 130 and the outer surfaces 1212 and 1222 of the lens frame 120 are provided with threads. It may be fixed with screws.
  • the imaging side pressing ring 130 corresponds to an example of the rear end pressing ring referred to in the present invention.
  • the subject-side holding ring 140 is a ceramic member made of the same material as the lens frame 120, for example, and has a substantially cylindrical shape. One open end has a shape protruding toward the center of the cylinder.
  • the subject side holding ring 140 holds the subject side end portions 1214 and 1224 of the lens frame 120 in a state where the lens frame pieces 1210 and 1220 are assembled. More specifically, the subject-side holding ring 140 covers the subject-side ends 1214 and 1224 of the lens frame 120 and is fixed to the lens frame 120.
  • the subject-side retaining ring 140 may be fixed to the lens frame 120 by bonding, or the inner periphery of the subject-side retaining ring 140 and the outer surfaces 1212 and 1222 of the lens frame 120 are provided with threads.
  • the subject-side holding ring 140 is a peripheral portion of the subject-side surface of the fourth lens 114 disposed on the most subject side of the four lenses 111, 112, 113, 114 accommodated in the lens frame 120. 1141 is held down. That is, the fourth lens 114 is sandwiched between the fourth positioning protrusions 12114 and 12214 of the lens frame 120 and the subject-side pressing ring 140.
  • the subject side pressing ring 140 corresponds to an example of the front end pressing ring referred to in the present invention.
  • the lenses 111, 112, 113, 114 are made of glass and have a hardness of HV300 to 800.
  • the lens frame 120, the imaging side pressing ring 130, and the subject side pressing ring 140 are made of ceramic and have a hardness of HV2600 or less. It is preferable that the hardness of the lens frame 120, the imaging side pressing ring 130, and the subject side pressing ring 140 is HV500 or more and 2600 or less from the viewpoint of impact resistance.
  • the hardness is expressed by the numerical value of Vickers hardness (HV), but this numerical value is almost the same even if it is Knoop hardness (Hk).
  • the adhesive tape 150 covers a contact portion of the contact portions between the lens frame pieces 1210 and 1220 excluding a portion covered with the imaging side pressing ring 130 and the subject side pressing ring 140.
  • the adhesive tape 150 ensures light shielding properties and dustproof properties.
  • This adhesive tape 150 corresponds to an example of a covering member according to the present invention.
  • the positions of the four lenses 111, 112, 113, 114 accommodated in the lens frame 120 in the direction of the arrow A that is the optical axis direction are the inner surfaces 1211 of the lens frame 120. It is determined by the first positioning protrusions 12111 and 12211, the second positioning protrusions 12112 and 12212, the third positioning protrusions 12113 and 12213, the fourth positioning protrusions 12114 and 12214, and the subject-side pressing ring 140.
  • the optical performance due to the axial misalignment of the lens or the like is between the outer diameter of each of the four lenses 111, 112, 113, 114 and the inner surfaces 1211, 1221 of the lens frame 120.
  • the tolerance is controlled so that a clearance of 20 ⁇ m or less, preferably a clearance of 10 ⁇ m or less is obtained when the lens barrel 100 is completely assembled.
  • the lens barrel 100 includes a lens frame piece 1210 in which a hollow lens frame 120 that is open at both ends in the direction of arrow A, which is the optical axis direction, is divided into two at a division plane parallel to the optical axis. 1220 is formed by joining together.
  • the lens frame shape in a state where the four lenses 111, 112, 113, and 114 are housed inside is held by the imaging side pressing ring 130 and the subject side pressing ring 140.
  • the lens barrel 100 of the first embodiment when the lens barrel 100 is assembled, after the four lenses 111, 112, 113, 114 are arranged on the lens frame pieces 1210, 1220, The lenses 111, 112, 113, and 114 can be connected to a lens frame shape accommodated therein, and the lens frame shape can be held by the imaging side pressing ring 130 and the subject side pressing ring 140. Therefore, according to the lens barrel 100 of the first embodiment, when the four lenses 111, 112, 113, 114 are accommodated in the lens frame 120, it is avoided that the two are rubbed and scraped to generate scraps. . For this reason, it is possible to prevent the optical performance from being deteriorated due to the scraped residue. A method for assembling the lens barrel 100 will be described later.
  • the lens frame is different from the first embodiment described above.
  • the third positioning projections 12113 and 12213, and the fourth positioning projection on the inner surfaces 1211 and 1221 of the lens frame 120 in the first embodiment instead of 12114 and 12214, three spacing rings 261, 262 and 263 are provided.
  • FIG. 4 is a longitudinal sectional view parallel to the optical axis direction of a lens barrel 200 which is a second embodiment of the lens barrel of the present invention.
  • the lens barrel 200 of the second embodiment includes four lenses 111, 112, 113, 114, three spacing rings 261, 262, 263, and two split surfaces parallel to the optical axis.
  • the three spacing rings 261, 262, 263 are arranged between adjacent lenses in the four lenses 111, 112, 113, 114. That is, the first spacing ring 261 is disposed between the first lens 111 and the second lens 112, the second spacing ring 262 is disposed between the second lens 112 and the third lens 113, and the third lens 113. A third spacing ring 263 is disposed between the first lens 114 and the fourth lens 114.
  • These three spacing rings 261, 262, and 263 are respectively the first positioning projections 12111 and 12211, the second positioning projections 12112 and 12212, and the third positioning projections 12113 and 12213 on the inner surfaces 1211 and 1221 of the lens frame 120 in the first embodiment.
  • the fourth positioning protrusions 12114 and 12214 instead of the fourth positioning protrusions 12114 and 12214, the positions of the four lenses 111, 112, 113, and 114 in the direction of the arrow A that is the optical axis direction are determined.
  • the lens frame 220 is a ceramic member having higher hardness than the four lenses 111, 112, 113, 114.
  • the lens frame 220 is formed by joining lens frame pieces 2210 and 2220 which are divided into two by a dividing surface parallel to the optical axis.
  • the lens frame 220 formed in this way is a hollow shape that accommodates the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263, and is open at both ends in the direction of the arrow A, which is the optical axis direction.
  • inner surfaces 2211, 2221 and outer surfaces 2212, 2222 are examples of the lens frame 220.
  • the lens frame 220 includes an imaging-side lens holder that holds down the peripheral portion 1111 of the imaging-side surface of the first lens 111 disposed on the most imaging side of the four lenses 111, 112, 113, and 114. Parts 2215 and 2225.
  • This lens frame 220 corresponds to an example of a lens frame according to the present invention.
  • a ceramic member can be used similarly to the lens frame 220, and resin or glass can also be used.
  • the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263 are formed on the imaging side lens pressing portions 2215, 2225 and the subject side of the lens frame 220. It is sandwiched between the holding ring 140. That is, the positions of the four lenses 111, 112, 113, and 114 accommodated in the lens frame 220 in the direction of the arrow A, which is the optical axis direction, are the imaging-side lens pressing portions 2215 and 2225, the three spacing rings 261 and 261. 262 and 263, and subject side pressing ring 140.
  • the optical performance due to the axial misalignment of the lens or the like is between the outer diameters of the four lenses 111, 112, 113, 114 and the inner surfaces 2211, 2221 of the lens frame 220.
  • the tolerance is controlled so that a clearance of 20 ⁇ m or less, preferably a clearance of 10 ⁇ m or less is obtained when the lens barrel 200 is completely assembled.
  • the lens barrel 200 includes a lens frame piece 2210 in which a hollow lens frame 220 that is open at both ends in the direction of the arrow A, which is the optical axis direction, is divided into two at a dividing plane parallel to the optical axis. 2220 is formed by joining together.
  • the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263 are placed inside by the imaging side pressing ring 130 and the subject side pressing ring 140. The lens frame shape in the accommodated state is maintained.
  • the lens frame pieces 2210 and 2220 are provided with the four lenses 111, 112, 113, and 114 and the three spacing rings 261 and 261.
  • the four lenses 111, 112, 113, and 114 and the three spacing rings 261, 262, and 263 are connected to the lens frame shape accommodated therein, and the imaging-side holding ring 130 and the subject are connected.
  • the lens frame shape can be held by the side pressing ring 140. Therefore, according to the lens barrel 200 of the second embodiment, when the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263 are accommodated in the lens frame 220, both are rubbed. Generation of scraps is avoided. For this reason, it is possible to prevent the optical performance from being deteriorated due to the scraped residue. A method for assembling the lens barrel 200 will be described later.
  • the lens frame and the covering member are different from the first embodiment described above. Further, in the third embodiment, the imaging side pressing ring 130 and the subject side pressing ring 140 are not provided.
  • FIG. 5 is a perspective view showing a lens barrel 300, which is a third embodiment of the lens barrel of the present invention, seen obliquely from above the subject side, and FIG. 6 shows the light of the lens barrel 300 shown in FIG. It is a longitudinal cross-sectional view parallel to an axial direction.
  • the lens barrel 300 of the third embodiment includes four lenses 111, 112, 113, and 114 and a lens frame piece that is divided into two by a dividing surface parallel to the optical axis.
  • a lens frame 320 formed by connecting 3210 and 3220 and a ceramic adhesive 350 are provided.
  • the lens frame 320 is a ceramic member having a hardness higher than that of the four lenses 111, 112, 113, 114. Further, the lens frame 320 is formed by joining lens frame pieces 3210 and 3220 divided into two by a dividing surface parallel to the optical axis, for example, by a ceramic adhesive.
  • the lens frame 320 formed in this way is a hollow shape that accommodates the four lenses 111, 112, 113, 114, and opens at both ends in the direction of the arrow A, which is the optical axis direction, and has inner surfaces 3211, 3221, and an outer surface 3212. , 3222.
  • first positioning protrusions 12111 that determine the positions of the four lenses 111, 112, 113, and 114 arranged in order from the imaging side in the direction of the arrow A that is the optical axis direction.
  • the fifth positioning protrusions 32115 and 32215 are arranged on the most subject side of the four lenses 111, 112, 113, and 114 accommodated in the lens frame 120 instead of the subject-side holding ring 140 in the first embodiment described above.
  • the peripheral portion 1141 of the subject side surface of the fourth lens 114 to be provided is pressed.
  • This lens frame 320 corresponds to an example of a lens frame according to the present invention.
  • the ceramic adhesive 350 covers the contact portion between the lens frame pieces 3210 and 3220.
  • the ceramic adhesive 350 ensures light shielding and dust resistance.
  • the ceramic adhesive has a low temperature sintered ceramic as a main component, and the thermal expansion coefficient after curing is similar to that of the lens frame pieces 3210 and 3220. Therefore, the ceramic adhesive of the lens frame 320 caused by thermal expansion and contraction is used. Damage can be prevented.
  • This ceramic adhesive 350 corresponds to an example of a covering member according to the present invention.
  • the positions of the four lenses 111, 112, 113, 114 accommodated in the lens frame 320 in the direction of the arrow A that is the optical axis direction are the inner surfaces 3211 of the lens frame 320, It is determined by the first positioning protrusions 12111 and 12211, the second positioning protrusions 12112 and 12212, the third positioning protrusions 12113 and 12213, the fourth positioning protrusions 12114 and 12214, and the fifth positioning protrusions 32115 and 32215.
  • the optical performance due to the axial misalignment of the lens between the outer diameters of the four lenses 111, 112, 113, 114 and the inner surfaces 3211, 3221 of the lens frame 320 is controlled so that a clearance of 20 ⁇ m or less, preferably a clearance of 10 ⁇ m or less is obtained when the lens barrel 300 is completely assembled.
  • the lens barrel 300 of the third embodiment includes a lens frame piece 3210 in which a hollow lens frame 320 opened at both ends in the direction of arrow A, which is the optical axis direction, is divided into two at a division plane parallel to the optical axis. 3220 is formed by, for example, joining together by a ceramic adhesive. Therefore, according to the lens barrel 300 of the third embodiment, after the four lenses 111, 112, 113, 114 are arranged on the lens frame pieces 3210, 3220 when the lens barrel 300 is assembled, The lenses 111, 112, 113, and 114 can be connected to a lens frame shape in the state of being housed inside.
  • the lens barrel 300 of the third embodiment when the four lenses 111, 112, 113, 114 are accommodated in the lens frame 320, it is avoided that the two are rubbed and scraped. . For this reason, it is possible to prevent the optical performance from being deteriorated due to the scraped residue. A method for assembling the lens barrel 300 will be described later.
  • the first embodiment described below is an assembling method of the lens barrel 100 described with reference to FIGS.
  • the components of the lens barrel 100 are denoted by the same reference numerals and description thereof is omitted, and only the method of assembling the lens barrel 100 (see FIGS. 1 to 3) will be described.
  • FIG. 7 is an explanatory diagram showing a process of arranging four lenses 111, 112, 113, 114 on one lens frame piece 1210.
  • a lens frame 120 that is hollow and opens at both ends in the direction of the arrow A, which is the optical axis direction, and accommodates the four lenses 111, 112, 113, 114 is divided into two at a dividing plane parallel to the optical axis.
  • Four lenses 111, 112, 113, 114 are arranged on one lens frame piece 1210 of the lens frame pieces 1210, 1220 having a different shape. More specifically, the four lenses 111, 112, and 112, with the first positioning protrusion 12111, the second positioning protrusion 12112, the third positioning protrusion 12113, and the fourth positioning protrusion 12114 on the inner surface 1211 of one lens frame piece 1210 as a reference. 113 and 114 are arranged.
  • one lens frame piece 1210 and the other lens frame piece 1220 are joined to a lens frame shape in which four lenses 111, 112, 113, 114 are housed inside.
  • the imaging side end portions 1213 and 1223 and the subject side end portions 1214 and 1224 of the lens frame 120 in a state where the lens frame pieces 1210 and 1220 are assembled are pressed by the imaging side pressing ring 130 and the subject side pressing ring 140, respectively.
  • the subject-side pressing ring 140 presses the peripheral portion 1141 of the subject-side surface of the fourth lens 114 provided on the outermost subject side of the four lenses 111, 112, 113, 114.
  • the contact portions between the lens frame pieces 1210 and 1220 the contact portions excluding the portions covered with the imaging side pressing ring 130 and the subject side pressing ring 140 are covered with the adhesive tape 150.
  • the fourth lens 114 is sandwiched between the fourth positioning protrusions 12114 and 12214 of the lens frame 120 and the subject-side pressing ring 140.
  • the lens barrel assembling method of the first embodiment when the four lenses 111, 112, 113, 114 are accommodated in the lens frame 120, it is avoided that the two are rubbed and scraped. For this reason, in the assembled lens barrel 100, it is possible to prevent the optical performance from being deteriorated due to shaving residue. Further, the lens frame shape in which the four lenses 111, 112, 113, and 114 are housed inside is held by the imaging side pressing ring 130 and the subject side pressing ring 140. In addition, the adhesive tape 150 ensures light shielding and dustproof properties.
  • the second embodiment described below is an assembling method of the lens barrel 200 described with reference to FIG.
  • the constituent elements of the lens barrel 200 are denoted by the same reference numerals and the description thereof is omitted, and only the assembling method of the lens barrel 200 (see FIG. 4) will be described.
  • FIG. 8 is an explanatory diagram showing a process of arranging four lenses 111, 112, 113, 114 and three spacing rings 261, 262, 263 on one lens frame piece 2210.
  • a lens frame 220 having a hollow shape opened at both ends in the direction of the arrow A that is the optical axis direction and accommodating four lenses 111, 112, 113, 114 and three spacing rings 261, 262, 263 is provided on the optical axis.
  • One lens frame piece 2210 of the two divided lens frame pieces 2210 and 2220 on a parallel dividing surface is provided with four lenses 111, 112, 113, 114 and three spacing rings 261, 262, 263. Place.
  • one lens frame piece 2210 and the other lens frame piece 2220 are formed into a lens frame shape in which four lenses 111, 112, 113, 114 and three spacing rings 261, 262, 263 are housed inside. Connect together.
  • the imaging side end portions 2213 and 2223 and the subject side end portions 2214 and 2224 of the lens frame 220 in a state where the lens frame pieces 2210 and 2220 are assembled are respectively connected to the imaging side pressing ring 130 and The object side holding ring 140 is pressed. Further, the subject-side pressing ring 140 presses the peripheral portion 1141 of the subject-side surface of the fourth lens 114 provided on the outermost subject side of the four lenses 111, 112, 113, 114.
  • the contact portions between the lens frame pieces 2210 and 2220 the contact portions excluding the portions covered with the imaging side pressing ring 130 and the subject side pressing ring 140 are covered with the adhesive tape 150.
  • the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263 are sandwiched between the imaging side lens pressing portions 2215, 2225 and the subject side pressing ring 140 of the lens frame 220. And fixed in the lens frame 220.
  • the lens barrel assembling method of the second embodiment when the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263 are accommodated in the lens frame 220, both are scraped and scraped. Generation of waste is avoided. For this reason, in the assembled lens barrel 200, it is possible to prevent the optical performance from being deteriorated due to the scraped residue.
  • the image-side holding ring 130 and the subject-side holding ring 140 hold the lens frame shape in which the four lenses 111, 112, 113, 114 and the three spacing rings 261, 262, 263 are housed inside.
  • the adhesive tape 150 ensures light shielding and dustproof properties.
  • the third embodiment described below is an assembling method of the lens barrel 300 described with reference to FIGS.
  • the components of the lens barrel 300 are denoted by the same reference numerals, and the description thereof is omitted. Only the method of assembling the lens barrel 300 (see FIGS. 5 and 6) will be described.
  • FIG. 9 is an explanatory diagram showing a process of arranging four lenses 111, 112, 113, 114 on one lens frame piece 3210.
  • a lens frame 320 that is hollow and opens at both ends in the direction of arrow A, which is the optical axis direction, and accommodates the four lenses 111, 112, 113, 114 is divided into two at a dividing plane parallel to the optical axis.
  • Four lenses 111, 112, 113, and 114 are arranged on one lens frame piece 3210 of the lens frame pieces 3210 and 3220 having a different shape. More specifically, four lens frame pieces 3210 on the inner surface 3211 are arranged with reference to the first positioning protrusion 12111, the second positioning protrusion 12112, the third positioning protrusion 12113, the fourth positioning protrusion 12114, and the fifth positioning protrusion 32115.
  • Two lenses 111, 112, 113, 114 are arranged.
  • one lens frame piece 3210 and the other lens frame piece 3220 are joined to a lens frame shape in which four lenses 111, 112, 113, and 114 are housed inside, and are bonded and fixed by a ceramic adhesive 350. To do.
  • the ceramic adhesive 350 ensures light shielding and dust resistance.
  • the example in which the plurality of lenses according to the present invention is four lenses has been described.
  • the plurality of lenses according to the present invention is not limited to this.
  • the lens frame piece referred to in the present invention has been described as being divided into two by a dividing plane parallel to the optical axis.
  • the present invention is not limited to this, and may be divided by a surface inclined with respect to the optical axis, a curved surface, or may be divided into three or more.
  • the present invention is not limited to this,
  • the side may be the front end side in the present invention, and the subject side may be the rear end side in the present invention.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

La présente invention se rapporte à un barillet de lentille et à un procédé d'assemblage de barillet de lentille, l'apparition de bavures pendant l'assemblage étant évitée et la détérioration de la performance optique provoquée par les bavures étant empêchée dans le barillet de lentille assemblé. Dans le barillet de lentille (300), une monture de lentille (320) ayant un centre creux et une ouverture au niveau des deux extrémités dans le sens de la flèche (A) qui est la direction de l'axe optique, est formée par des sections de monture de lentille (3210, 3220) qui ont été divisées en deux le long d'une surface de séparation parallèle à l'axe optique et réunies, par exemple, par un adhésif céramique.
PCT/JP2011/063314 2010-06-15 2011-06-10 Barillet de lentille et procédé d'assemblage de barillet de lentille WO2011158740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-136439 2010-06-15
JP2010136439A JP2012002944A (ja) 2010-06-15 2010-06-15 レンズ鏡胴およびレンズ鏡胴組立方法

Publications (1)

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WO2011158740A1 true WO2011158740A1 (fr) 2011-12-22

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Application Number Title Priority Date Filing Date
PCT/JP2011/063314 WO2011158740A1 (fr) 2010-06-15 2011-06-10 Barillet de lentille et procédé d'assemblage de barillet de lentille

Country Status (2)

Country Link
JP (1) JP2012002944A (fr)
WO (1) WO2011158740A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125306A (ja) * 1985-11-27 1987-06-06 Matsushita Electric Ind Co Ltd レンズ組立体
JP2006292927A (ja) * 2005-04-08 2006-10-26 Matsushita Electric Ind Co Ltd レンズユニットとその製造方法
WO2008029852A1 (fr) * 2006-09-06 2008-03-13 Nikon Corporation Dispositif optique, appareil d'exposition et procédé de fabrication du dispositif

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125306A (ja) * 1985-11-27 1987-06-06 Matsushita Electric Ind Co Ltd レンズ組立体
JP2006292927A (ja) * 2005-04-08 2006-10-26 Matsushita Electric Ind Co Ltd レンズユニットとその製造方法
WO2008029852A1 (fr) * 2006-09-06 2008-03-13 Nikon Corporation Dispositif optique, appareil d'exposition et procédé de fabrication du dispositif

Also Published As

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JP2012002944A (ja) 2012-01-05

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