JP2006292927A - Lens unit and manufacturing method therefor - Google Patents

Lens unit and manufacturing method therefor Download PDF

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JP2006292927A
JP2006292927A JP2005111989A JP2005111989A JP2006292927A JP 2006292927 A JP2006292927 A JP 2006292927A JP 2005111989 A JP2005111989 A JP 2005111989A JP 2005111989 A JP2005111989 A JP 2005111989A JP 2006292927 A JP2006292927 A JP 2006292927A
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lens
lens unit
lens barrel
support portions
support
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Toshinari Noda
俊成 野田
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem, wherein a conventional lens unit incorporated in a camera is mounted on a vehicle seals a gap by disposing a lens 14 within a lens barrel 12 and sealing the gap between them with a rubber member, such as an O-ring 15a, however, the sealing performance of the lens unit cannot be maintained, since the differences in the thermal expansion coefficients between the O-ring 15a and other members are large due to the temperature change when the lens unit is mounted on the vehicle. <P>SOLUTION: A lens unit includes a lens barrel 1; support parts 3a and 3b formed on the internal circumferential face of the lens barrel 1 at a predetermined interval in the direction of the length of the lens barrel 1; and lenses 2a and 2b, whose peripheral parts 5a and 5b respectively are supported by the support parts 3a and 3b, respectively. Since the support parts 3a and 3b and the peripheral parts 5a and 5b of the lenses 2a and 2b are bonded directly by oxygen-covalent bond, the gaps between them are sealed, and a lens unit, capable of retaining a sealing structure even under temperature change, is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、レンズまたは各種光学フィルタから成る車載用等のレンズユニットとその製造方法に関するものである。   The present invention relates to an on-vehicle lens unit composed of a lens or various optical filters and a method for manufacturing the same.

近年、車のバックモニタおよびフロントサイドのブラインドモニタに用いられる車載用カメラの需要が高まっている。このような車載カメラに用いられるレンズユニットは、耐熱性、耐湿性が求められる。   In recent years, there has been an increasing demand for in-vehicle cameras used for vehicle back monitors and front side blind monitors. A lens unit used for such an in-vehicle camera is required to have heat resistance and moisture resistance.

そこで、従来の車載カメラ用のレンズユニットは、図５に示されるような構成を有していた。   Therefore, a conventional lens unit for an in-vehicle camera has a configuration as shown in FIG.

図５は従来のレンズユニットである。   FIG. 5 shows a conventional lens unit.

図５において、１１はケース、１２は鏡筒であり、ケース１１の開口は押さえ部材１３により封止され、ケース１１と押さえ部材１３の隙間はＯリング１５ｂで封止されている。そしてこの押さえ部材１３の開口はレンズ１４により封止され、押さえ部材１３とレンズ１４の隙間をＯリング１５ａで封止していた。   In FIG. 5, 11 is a case, 12 is a lens barrel, the opening of the case 11 is sealed by a pressing member 13, and the gap between the case 11 and the pressing member 13 is sealed by an O-ring 15b. The opening of the pressing member 13 is sealed by the lens 14, and the gap between the pressing member 13 and the lens 14 is sealed by an O-ring 15a.

例えばその先行技術としては下記特許文献１が挙げられる。
特開２００４−２９５１１９号公報 For example, as the prior art, the following Patent Document 1 is cited.
JP 2004-295119 A

上記従来の構成では、鏡筒１２にレンズ１４を設置し、Ｏリング１５ａなどのゴム部材で封止している。しかし、金属製の鏡筒１２およびガラス製のレンズ１４とゴム製のリング１５ａの熱膨張係数の差は非常に大きく、車に取り付けられた際の温度変化の下、とりわけ低温下でゴム製のＯリング１５ａは収縮し、レンズ１４と鏡筒１２の間に隙間が発生してしまい、レンズユニットの密封構造が維持できず水分が浸入するという問題を有していた。   In the conventional configuration, the lens 14 is installed in the lens barrel 12 and sealed with a rubber member such as an O-ring 15a. However, the difference in coefficient of thermal expansion between the metal lens barrel 12 and the glass lens 14 and the rubber ring 15a is very large. The O-ring 15a contracts, and a gap is generated between the lens 14 and the lens barrel 12, so that the sealing structure of the lens unit cannot be maintained and moisture enters.

そこで本発明は、温度変化の下でも密封性を維持したレンズユニットを提供することを目的とする。   Therefore, an object of the present invention is to provide a lens unit that maintains hermeticity even under temperature changes.

この目的を達成するために本発明は、鏡筒と、この鏡筒内周面の長手方向に所定間隔をおいて設けた第一、第二の支持部と、外周部がこれらの第一、第二の支持部にそれぞれ支持される第一、第二の光学素子とを備え、前記第一、第二の支持部と第一、第二の光学素子の外周部とを酸素の共有結合により直接接合した。   In order to achieve this object, the present invention provides a lens barrel, first and second support portions provided at predetermined intervals in the longitudinal direction of the inner peripheral surface of the lens barrel, and an outer peripheral portion of these first, First and second optical elements supported respectively by the second support part, and the first and second support parts and the outer peripheral part of the first and second optical elements are formed by covalent bonding of oxygen. Directly joined.

以上のように本発明のレンズユニットは、鏡筒内周面に設けた支持部と光学素子の外周面とを直接接合するため、温度変化の下でも鏡筒とレンズの間に熱膨張係数の差による隙間が生じることなく、鏡筒内を確実に密封できるレンズユニットを提供することが可能となる。   As described above, since the lens unit of the present invention directly joins the support portion provided on the inner peripheral surface of the lens barrel and the outer peripheral surface of the optical element, the coefficient of thermal expansion is maintained between the lens barrel and the lens even under a temperature change. It is possible to provide a lens unit that can reliably seal the inside of the lens barrel without causing a gap due to the difference.

（実施の形態１）
以下、本発明の一実施形態について図を用いて説明する。 (Embodiment 1)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１は本発明の実施の形態１におけるレンズユニットの断面図、図２はレンズユニットの分解斜視図である。   1 is a cross-sectional view of a lens unit according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view of the lens unit.

図１において、本実施の形態のレンズユニットは貫通孔１ａを有する鏡筒１と、この鏡筒１内周面に所定間隔をおいて設けられた支持部３ａ，３ｂ，３ｃと、これらの支持部３ａ，３ｂ，３ｃにそれぞれ当接し、支持されるレンズ２ａ，２ｂ，２ｃから構成される。そして、この支持部３ａ，３ｂとレンズ２ａ，２ｂの外周部５ａ，５ｂとを直接接合することにより、鏡筒内を封止する構造とした。   In FIG. 1, the lens unit of the present embodiment includes a lens barrel 1 having a through hole 1a, support portions 3a, 3b, 3c provided on the inner peripheral surface of the lens barrel 1 at a predetermined interval, and support for these. It comprises lenses 2a, 2b and 2c which are in contact with and supported by the parts 3a, 3b and 3c, respectively. And it was set as the structure which seals the inside of a lens-barrel by directly joining these support parts 3a and 3b and the outer peripheral parts 5a and 5b of lenses 2a and 2b.

そして、このレンズユニットは、鏡筒１に対して径の小さいレンズ２ａから順に貫通孔１ａ内に設置し、各レンズ２ａ，２ｂ，２ｃの径に対応する支持部３ａ，３ｂ，３ｃにレンズ２ａ，２ｂ，２ｃの外周部５ａ，５ｂ，５ｃを当接することにより各レンズ間距離を規定する構造とし、このような構成により、光軸４を調整している。   The lens unit is installed in the through hole 1a in order from the lens 2a having a smaller diameter with respect to the lens barrel 1, and the lens 2a is attached to the support portions 3a, 3b, 3c corresponding to the diameters of the lenses 2a, 2b, 2c. , 2b, and 2c are in contact with the outer peripheral portions 5a, 5b, and 5c to define the distance between the lenses, and the optical axis 4 is adjusted by such a configuration.

このレンズユニットにおいて、レンズ２ａおよびレンズ２ｂにおける鏡筒１の支持部３ａ，３ｂとの接合面は、平面または凹部としている。そしてこのレンズ２ａおよびレンズ２ｂの外周部５ａ，５ｂは鏡面研磨されている。このような構成により、レンズ２ａ，２ｂの表面を鏡面研磨した際に、支持部３ａ，３ｂに接合するレンズ２ａ，２ｂの外周部５ａ，５ｂを効率よく確実に研磨することができる。   In this lens unit, the joint surfaces of the lens 2a and the lens 2b with the support portions 3a and 3b of the lens barrel 1 are flat surfaces or concave portions. The outer peripheral portions 5a and 5b of the lens 2a and the lens 2b are mirror-polished. With such a configuration, when the surfaces of the lenses 2a and 2b are mirror-polished, the outer peripheral portions 5a and 5b of the lenses 2a and 2b joined to the support portions 3a and 3b can be polished efficiently and reliably.

また、鏡筒１の貫通孔１ａ内に設けられた支持部３ａおよび図２に示すように３ｂも鏡面研磨されている。そしてこの支持部３ａ，３ｂ上にレンズ２ａ，２ｂの外周部５ａ，５ｂを直接接合している。   Further, the support portion 3a provided in the through hole 1a of the lens barrel 1 and the mirror 3b as shown in FIG. The outer peripheral portions 5a and 5b of the lenses 2a and 2b are directly joined to the support portions 3a and 3b.

このレンズユニットにおいて、鏡筒１を金属製またはセラミック製、レンズ２ａ，２ｂをガラス製またはセラミック製とすることにより、吸湿時の膨張を抑えることができ、高湿下でも高い信頼性を実現することが可能となる。   In this lens unit, the lens barrel 1 is made of metal or ceramic, and the lenses 2a and 2b are made of glass or ceramic, so that expansion at the time of moisture absorption can be suppressed and high reliability is realized even under high humidity. It becomes possible.

また、鏡筒１の線熱膨張係数とレンズ２ａ，２ｂの線熱膨張係数が近いものを選択することにより、高温下での鏡筒１とレンズ２ａ，２ｂへの応力の集中を緩和することができるため、封着部の剥離、ワレを防止するとともに、レンズへの応力複屈折の発生を抑制することができ、高い信頼性を実現することが可能になる。   Further, by selecting a lens having a linear thermal expansion coefficient close to that of the lens barrel 1 and the lenses 2a and 2b, stress concentration on the lens barrel 1 and the lenses 2a and 2b under high temperature can be reduced. Therefore, it is possible to prevent peeling and cracking of the sealing portion, and to suppress the occurrence of stress birefringence to the lens, thereby realizing high reliability.

また支持部３ａ，３ｂ上にレンズ２ａ，２ｂを直接接合する構造により、温度変化の下でも支持部３ａ，３ｂとレンズ２ａ，２ｂの外周部５ａ，５ｂ間に熱膨張係数の差による隙間が生じることがないため、鏡筒１内を確実に密封できる。また、各レンズ２ａ〜２ｃ間の光軸４方向の距離をμｍ単位で制御することが可能であり、レンズユニットの組み立てにおける光学特性の劣化を抑制することができる。   Further, the structure in which the lenses 2a and 2b are directly joined to the support portions 3a and 3b allows a gap due to a difference in thermal expansion coefficient between the support portions 3a and 3b and the outer peripheral portions 5a and 5b of the lenses 2a and 2b even under temperature changes. Since it does not occur, the inside of the lens barrel 1 can be reliably sealed. Further, the distance in the optical axis 4 direction between the lenses 2a to 2c can be controlled in units of μm, and deterioration of optical characteristics in assembling the lens unit can be suppressed.

なお、本実施の形態では、鏡筒１とレンズ２ａ，２ｂによるレンズユニットの封止構造について説明したがこの限りではなく、レンズの代わりに、赤外カットフィルタ、紫外カットフィルタ、ＮＤフィルタや光学ローパスフィルタ等の各種光学フィルタを用いても良い。   In the present embodiment, the lens unit sealing structure using the lens barrel 1 and the lenses 2a and 2b has been described. However, the present invention is not limited to this, and instead of the lens, an infrared cut filter, an ultraviolet cut filter, an ND filter, or an optical filter is used. Various optical filters such as a low-pass filter may be used.

さらに、本実施の形態では、レンズ２ａ、レンズ２ｂの間にレンズ２ｃを、鏡筒１の支持部３ｃに当接させ設置したが、レンズ２ａとレンズ２ｂの間には１枚以上のレンズを設置してもよく、またレンズのほかに赤外カットフィルタ、紫外カットフィルタ、ＮＤフィルタや光学ローパスフィルタ等の各種光学フィルタを設置しても良い。また、このレンズ２ｃは、接着剤など、所望の方法で支持部３ｃに接合させることができる。   Furthermore, in the present embodiment, the lens 2c is disposed between the lens 2a and the lens 2b in contact with the support portion 3c of the lens barrel 1, but one or more lenses are disposed between the lens 2a and the lens 2b. In addition to the lens, various optical filters such as an infrared cut filter, an ultraviolet cut filter, an ND filter, and an optical low-pass filter may be installed. The lens 2c can be bonded to the support portion 3c by a desired method such as an adhesive.

（実施の形態２）
以下、本発明の他の実施形態について図を用いて説明する。 (Embodiment 2)
Hereinafter, other embodiments of the present invention will be described with reference to the drawings.

図３は他の実施の形態におけるレンズユニットの断面図である。   FIG. 3 is a cross-sectional view of a lens unit according to another embodiment.

図３において、本実施の形態のレンズユニットは貫通孔１ａを有する鏡筒１と、この鏡筒１内周面に所定間隔をおいて設けられた支持部３ａ，３ｂ，３ｃと、この支持部３ａ，３ｂ，３ｃにそれぞれ当接し、支持されるレンズ２ａ，２ｂ，２ｃから構成される。そして、この支持部３ａ，３ｂとレンズ２ａ，２ｂの外周部５ａ，５ｂとを酸素の共有結合により直接接合することにより、鏡筒１内を封止する構造とした。   In FIG. 3, the lens unit of the present embodiment includes a lens barrel 1 having a through hole 1a, support portions 3a, 3b, 3c provided at predetermined intervals on the inner peripheral surface of the lens barrel 1, and the support portions. The lenses 2a, 2b and 2c are in contact with and supported by 3a, 3b and 3c, respectively. Then, the inside of the lens barrel 1 is sealed by directly joining the support portions 3a and 3b and the outer peripheral portions 5a and 5b of the lenses 2a and 2b by oxygen covalent bonds.

また、このレンズユニットは、鏡筒１の貫通孔１ａの両側からレンズを挿入することが可能な構造となっており、第１のレンズ２ａと第２のレンズ２ｂの外径差が小さい場合に有効である。   Further, this lens unit has a structure in which a lens can be inserted from both sides of the through hole 1a of the lens barrel 1, and when the outer diameter difference between the first lens 2a and the second lens 2b is small. It is valid.

その他の構成、作用、効果に関しては実施の形態１と同様であるため省略する。   Other configurations, functions, and effects are the same as those in the first embodiment, and are omitted.

（実施の形態３）
以下、本発明のレンズユニットの製造方法について図１および図４を用いて説明する。 (Embodiment 3)
Hereinafter, the manufacturing method of the lens unit of this invention is demonstrated using FIG. 1 and FIG.

図１、図４（ａ）のように、レンズ２ａおよびレンズ２ｂにおける鏡筒１の支持部３ａ，３ｂとの接合面は平面または凹面とし、この面の全面を鏡面研磨することでレンズ外周部５ａ，５ｂの支持部３との接合面も確実に鏡面研磨することができる。   As shown in FIGS. 1 and 4A, the joint surface of the lens 2a and the lens 2b with the support portions 3a and 3b of the lens barrel 1 is a flat surface or a concave surface, and the entire surface of the surface is mirror-polished so that the lens outer peripheral portion. The joint surfaces of the support portions 3 of 5a and 5b can also be mirror-polished reliably.

また図１において、鏡筒１の貫通孔１ａ内には所定間隔をおいて支持部３ａ，３ｂが設けられており、これらの支持部３ａ，３ｂも鏡面研磨されている。次に、レンズ２ａ，２ｂの鏡面研磨をした部分と鏡筒１の支持部３ｂ，３ｃを洗浄する。ここで、レンズ２ａ，２ｂに非球面レンズ等のガラス熱プレス成形により作製したレンズを用いる場合には、成形後のガラス材料が酸やアルカリに弱いという特徴があるものが多く、それらを用いて化学洗浄を行った場合はレンズ表面にヤケが発生してしまう。したがって、非球面レンズ等のガラス熱プレス成形により作製したレンズの洗浄を行う場合は、中性洗剤を用いてこすり洗いをすることが望ましい。洗浄用のパッドには、不織布またはスエード地のものを用いることにより、研磨時に残留した研磨材をより効率よく取り除くことができる。   In FIG. 1, support portions 3a and 3b are provided in the through hole 1a of the lens barrel 1 at a predetermined interval, and these support portions 3a and 3b are also mirror-polished. Next, the mirror-polished portions of the lenses 2a and 2b and the support portions 3b and 3c of the lens barrel 1 are washed. Here, when using lenses made by glass hot press molding such as aspherical lenses for the lenses 2a and 2b, there are many characteristics that the glass material after molding is weak against acid and alkali. If chemical cleaning is performed, burns will occur on the lens surface. Therefore, when cleaning a lens produced by glass hot press molding such as an aspheric lens, it is desirable to rub with a neutral detergent. By using a non-woven fabric or a suede as the cleaning pad, it is possible to more efficiently remove the abrasive remaining during polishing.

そして、洗浄後はスピン乾燥やＩＰＡ蒸気乾燥等によって乾燥する。この後に図４（ｂ）のように、清浄な雰囲気でレンズ２ｂの外周部５ｂと鏡筒１の支持部３ｂとを重ね合わせ、圧力をかけ面を接触させると、図４（ｃ）のように接合面が自然に密着する。この状態でも通常の取扱い上は剥離しない程度の接着力が得られるが３００度程度の温度で１時間程度の加熱を行うことによって、レンズ２ｂと支持部３ｂは酸素の共有結合の原子同士の強固な結合で接合する。この時、レンズ２ｂと鏡筒１の線熱膨張係数は近いものが望ましい。   And after washing | cleaning, it dries by spin drying, IPA vapor | steam drying, etc. Thereafter, as shown in FIG. 4B, when the outer peripheral portion 5b of the lens 2b and the support portion 3b of the lens barrel 1 are superposed in a clean atmosphere and pressure is applied to bring the surface into contact with each other, as shown in FIG. The joint surface naturally adheres. Even in this state, an adhesive strength that does not peel off can be obtained in normal handling. However, by heating for about 1 hour at a temperature of about 300 ° C., the lens 2b and the support portion 3b have strong oxygen covalently bonded atoms. Join with proper bonding. At this time, it is desirable that the linear thermal expansion coefficients of the lens 2b and the lens barrel 1 are close.

また、レンズ２ａの外周部５ａと鏡筒の支持部３ａとの間の密着も、上記と同様に行う。ここで、実施の形態１の構成を成すレンズユニット（図１に示す）であればレンズ２ａ，２ｂの順でそれぞれ支持部３ａ，３ｂに接合させるが、実施の形態２の構成（図３に示す）であれば、レンズ２ａ，２ｂの挿入順序は問わない。   Further, the close contact between the outer peripheral portion 5a of the lens 2a and the support portion 3a of the lens barrel is performed in the same manner as described above. Here, in the lens unit (shown in FIG. 1) having the configuration of the first embodiment, the lenses 2a and 2b are joined to the support portions 3a and 3b in this order, but the configuration of the second embodiment (see FIG. 3). The order in which the lenses 2a and 2b are inserted does not matter.

なお、実験によれば、線熱膨張係数の差が３倍程度であるレンズ２ａ，２ｂと鏡筒１との接合も可能であった。よって、レンズ２ａ，２ｂと鏡筒１との線熱膨張係数の差がおよそ３倍以下であれば、必要な屈折率値と屈折率の温度特性、さらに信頼性の問題とを鑑みて適当なレンズ材料および鏡筒１を選択できる。   According to the experiment, it is possible to join the lens 2a and the lens barrel 1 having a difference in linear thermal expansion coefficient of about 3 times. Therefore, if the difference in coefficient of linear thermal expansion between the lenses 2a, 2b and the lens barrel 1 is about 3 times or less, it is appropriate in view of the necessary refractive index value, temperature characteristics of the refractive index, and reliability problems. The lens material and the lens barrel 1 can be selected.

さらに、本実施の形態では、鏡筒とレンズによるレンズユニットの封止構造について説明したがこの限りではなく、レンズの代わりに、赤外カットフィルタ、紫外カットフィルタ、ＮＤフィルタや光学ローパスフィルタ等の各種光学フィルタを用いても良い。   Furthermore, in this embodiment, the lens unit sealing structure using the lens barrel and the lens has been described. However, the present invention is not limited to this, and instead of the lens, an infrared cut filter, an ultraviolet cut filter, an ND filter, an optical low-pass filter, or the like. Various optical filters may be used.

以上のように本発明のレンズユニットは、温度変化の下であっても確実な封止構造を維持するという効果を有し、車載カメラ等に代表される撮像素子の用途として有用である。   As described above, the lens unit of the present invention has an effect of maintaining a reliable sealing structure even under a temperature change, and is useful as an application of an image pickup device typified by an in-vehicle camera.

本発明の一実施形態におけるレンズユニットを示す断面図Sectional drawing which shows the lens unit in one Embodiment of this invention 同レンズユニットの分解斜視図Exploded perspective view of the lens unit 本発明の他の実施形態におけるレンズユニットを示す断面図Sectional drawing which shows the lens unit in other embodiment of this invention. （ａ）〜（ｃ）はそれぞれ本発明のレンズユニットの製造方法を示す斜視図(A)-(c) is a perspective view which shows the manufacturing method of the lens unit of this invention, respectively. 従来のレンズユニットを示す断面図Sectional view showing a conventional lens unit

符号の説明Explanation of symbols

１ 鏡筒
１ａ 貫通孔
２ａ レンズ
２ｂ レンズ
２ｃ レンズ
３ａ 支持部
３ｂ 支持部
３ｃ 支持部
４ 光軸
５ａ 外周部
５ｂ 外周部
５ｃ 外周部 DESCRIPTION OF SYMBOLS 1 Lens tube 1a Through-hole 2a Lens 2b Lens 2c Lens 3a Support part 3b Support part 3c Support part 4 Optical axis 5a Outer part 5b Outer part 5c Outer part

Claims (7)

鏡筒と、この鏡筒内周面の長手方向に所定間隔をおいて設けた第一、第二の支持部と、外周部がこれらの第一、第二の支持部にそれぞれ支持される第一、第二の光学素子とを備え、前記第一、第二の支持部と第一、第二の光学素子の外周部とを、酸素の共有結合により直接接合したことを特徴とするレンズユニット。 The lens barrel, the first and second support portions provided at predetermined intervals in the longitudinal direction of the inner peripheral surface of the lens barrel, and the first and second support portions are respectively supported by the first and second support portions. A lens unit comprising: first and second optical elements, wherein the first and second support parts and the outer peripheral parts of the first and second optical elements are directly bonded by a covalent bond of oxygen. . 鏡筒と、この鏡筒内周面の長手方向に所定間隔をおいて設けた第一、第二の支持部と、外周部がこれらの第一、第二の支持部にそれぞれ支持される第一、第二の光学素子とを備え、前記鏡筒の上下の開口部からそれぞれ前記第一、第二の光学素子を挿入し、前記第一、第二の支持部と第一、第二の光学素子の外周部とを、酸素の共有結合により直接接合したことを特徴とするレンズユニット。 The lens barrel, the first and second support portions provided at predetermined intervals in the longitudinal direction of the inner peripheral surface of the lens barrel, and the first and second support portions are respectively supported by the first and second support portions. First and second optical elements, the first and second optical elements are inserted from the upper and lower openings of the lens barrel, respectively, and the first and second support parts and the first and second optical elements are inserted. A lens unit, wherein an outer peripheral portion of an optical element is directly joined by a covalent bond of oxygen. 前記第一の光学素子および第二の光学素子は、レンズまたは赤外カットフィルタまたは紫外カットフィルタまたはＮＤフィルタまたは光学ローパスフィルタであり、前記第一、第二の支持部との接合面が平面または凹面であることを特徴とする請求項１または請求項２に記載のレンズユニット。 The first optical element and the second optical element are a lens, an infrared cut filter, an ultraviolet cut filter, an ND filter, or an optical low-pass filter, and a bonding surface with the first and second support portions is flat or The lens unit according to claim 1, wherein the lens unit is a concave surface. 前記第一の光学素子および第二の光学素子がガラス製であることを特徴とする請求項１から請求項３のいずれか一つに記載のレンズユニット。 The lens unit according to any one of claims 1 to 3, wherein the first optical element and the second optical element are made of glass. 前記鏡筒を金属製またはセラミック製としたことを特徴とする請求項１から請求項４のいずれか一つに記載のレンズユニット。 The lens unit according to claim 1, wherein the lens barrel is made of metal or ceramic. 鏡筒と、この鏡筒内周面の長手方向に所定間隔をおいて設けた第一、第二の支持部と、外周部がこれらの第一、第二の支持部にそれぞれ支持される第一、第二の光学素子とを備え、前記第一、第二の支持部と第一、第二の光学素子の外周部とを接合する工程を、酸素の共有結合による直接接合によって行うレンズユニットの製造方法。 The lens barrel, the first and second support portions provided at predetermined intervals in the longitudinal direction of the inner peripheral surface of the lens barrel, and the first and second support portions are respectively supported by the first and second support portions. A lens unit comprising: first and second optical elements, wherein the step of joining the first and second support parts and the outer peripheral parts of the first and second optical elements is performed by direct joining using a covalent bond of oxygen Manufacturing method. 先ず前記支持部と光学素子の外周部を研磨剤で研磨し、擦り洗いした後、前記支持部と光学素子に残留した前記研磨剤を取り除き、乾燥させ、その後前記第一、第二の支持部と第一、第二の光学素子とを重ねて圧力をかけ、加熱し接合させることを特徴とする請求項６に記載のレンズユニット。 First, the support portion and the outer peripheral portion of the optical element are polished with an abrasive and rubbed, then the abrasive remaining on the support portion and the optical element is removed and dried, and then the first and second support portions The lens unit according to claim 6, wherein the first and second optical elements are overlapped with each other, pressure is applied, and heating and bonding are performed.
JP2005111989A 2005-04-08 2005-04-08 Lens unit and manufacturing method therefor Pending JP2006292927A (en)

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