JP2002221649A - Optical unit and optical device - Google Patents
Optical unit and optical deviceInfo
- Publication number
- JP2002221649A JP2002221649A JP2001015799A JP2001015799A JP2002221649A JP 2002221649 A JP2002221649 A JP 2002221649A JP 2001015799 A JP2001015799 A JP 2001015799A JP 2001015799 A JP2001015799 A JP 2001015799A JP 2002221649 A JP2002221649 A JP 2002221649A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical element
- effective
- holding member
- unit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Optical Head (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は光学ユニット及び光
学装置に関し、さらに詳しくは、第１光学素子と第２光
学素子とが一体化された光学ユニット及びこの光学ユニ
ットを有する光学装置に関する。The present invention relates to an optical unit and an optical device, and more particularly, to an optical unit in which a first optical element and a second optical element are integrated and an optical device having the optical unit.
【０００２】[0002]
【従来の技術】従来より、有効光学面を形成した第１光
学素子と、有効光学面を形成した第２光学素子を有し
て、第１光学素子と第２光学素子とが一体化された光学
ユニットがある。この光学ユニットにおいては、第１光
学素子と第２光学素子とで囲まれた空間は密閉状態とな
っている。2. Description of the Related Art Conventionally, a first optical element having an effective optical surface and a second optical element having an effective optical surface have been integrated with the first optical element and the second optical element. There is an optical unit. In this optical unit, a space surrounded by the first optical element and the second optical element is in a closed state.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この空
間が密閉状態になっていると、この光学ユニットの使用
環境温度湿度が変化した場合、この空間に存在する気体
である空気は膨張又は圧縮することにより、第１光学素
子と第２光学素子に外圧がかかり有効光学面の面精度の
低下等が生じ、また、使用環境温度が下がった場合、こ
の空間に含まれる水分が飽和状態となり前記空間側の有
効光学面に結露し光学性能に影響をおよぼしやすい。However, if the space is in a closed state, the air, which is a gas existing in the space, expands or compresses when the ambient temperature and humidity of the optical unit change. As a result, external pressure is applied to the first optical element and the second optical element to cause a decrease in surface accuracy of the effective optical surface, and when the use environment temperature decreases, the water contained in this space becomes saturated and the space side becomes Easily condenses on the effective optical surface of the lens and affects the optical performance.
【０００４】近年、高精度で安価な光ディスク用の光学
素子の要求が高まってきている。例えば、光ディスク用
対物レンズで空間を有する場合、上述のような有効光学
面の面精度の低下、結露等が無視できず問題となってき
た。In recent years, there has been an increasing demand for high-precision and inexpensive optical elements for optical disks. For example, when an objective lens for an optical disk has a space, the above-described decrease in surface accuracy of the effective optical surface, dew condensation, and the like cannot be ignored and have become problems.
【０００５】本発明は、上記の課題に鑑みなされたもの
で、第１発明の目的は、第１光学素子及び第２光学素子
で囲まれた空間が存在しても、有効光学面の面精度の低
下、結露等が生じにくい光学ユニットを提供することに
ある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the first invention to provide a method of manufacturing an optical device which has an effective optical surface even if a space surrounded by a first optical element and a second optical element exists. It is an object of the present invention to provide an optical unit which is less likely to cause a decrease in the temperature and dew condensation.
【０００６】第２発明の目的は第１光学素子、第２光学
素子及び中間保持部材で囲まれた空間が存在しても、有
効光学面の面精度の低下、結露等が生じにくい光学ユニ
ットを提供することにある。A second object of the present invention is to provide an optical unit which is less likely to cause a decrease in surface accuracy of an effective optical surface and dew condensation even if there is a space surrounded by the first optical element, the second optical element and the intermediate holding member. To provide.
【０００７】第３発明の目的は、上記光学ユニットを組
み込んでも、有効光学面の面精度の低下、結露等が生じ
にくい光学装置を提供することにある。A third object of the present invention is to provide an optical device in which a decrease in surface accuracy of an effective optical surface, dew condensation, and the like hardly occur even when the optical unit is incorporated.
【０００８】[0008]
【課題を解決するための手段】上記の第１発明の目的は
下記の手段のにより達成できる。The object of the first invention can be achieved by the following means.
【０００９】（１）有効光学面を有する第１光学素子と
有効光学面を有する第２光学素子とが一体化された光学
ユニットにおいて、少なくとも前記第１光学素子の有効
光学面と前記第２光学素子の有効光学面とで囲まれた空
間と、前記空間と外気との間に気体が流通する気体流路
とを備えたことを特徴とする光学ユニット。(1) In an optical unit in which a first optical element having an effective optical surface and a second optical element having an effective optical surface are integrated, at least an effective optical surface of the first optical element and the second optical element. An optical unit comprising: a space surrounded by an effective optical surface of an element; and a gas flow path through which gas flows between the space and outside air.
【００１０】上記の第２発明の目的は下記の手段により
達成できる。 （２）有効光学面を有する第１光学素子、有効光学面を
有する第２光学素子及び前記第１光学素子と前記第２光
学素子を保持する中間保持部材とを有し、前記第１光学
素子と前記第２光学素子とが前記中間保持部材を介して
一体化された光学ユニットにおいて、少なくとも前記第
１光学素子の有効光学面、前記第２光学素子の有効光学
面及び前記中間保持部材とで囲まれた空間と、前記空間
と外気との間に気体が流通する気体流路とを備えたこと
を特徴とする光学ユニット。The above object of the second invention can be achieved by the following means. (2) The first optical element having a first optical element having an effective optical surface, a second optical element having an effective optical surface, and an intermediate holding member for holding the first optical element and the second optical element. And the second optical element are integrated via the intermediate holding member, wherein at least the effective optical surface of the first optical element, the effective optical surface of the second optical element, and the intermediate holding member An optical unit comprising: an enclosed space; and a gas flow passage through which gas flows between the space and the outside air.
【００１１】上記の第３発明の目的は下記の手段により
達成できる。 （３）前記（１）又は（２）に記載の光学ユニットと、
前記光学ユニットに形成された気体流路を塞ぐことなく
前記光学ユニットを保持する保持部材とを備えたことを
特徴とする光学装置。The above object of the third invention can be achieved by the following means. (3) The optical unit according to (1) or (2),
An optical device, comprising: a holding member that holds the optical unit without blocking a gas flow path formed in the optical unit.
【００１２】[0012]
【発明の実施の形態】本発明の実施の形態の光学ユニッ
ト、および前記光学ユニットを有する光学装置について
図面を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical unit according to an embodiment of the present invention and an optical device having the optical unit will be described with reference to the drawings.
【００１３】（第１の実施の形態）図１は、実施の形態
の光学装置の要部構成を示す背面図と側面断面図であ
る。図１に示すように、光学装置１Ａは、光学ユニット
２Ａを有する光ピックアップ用の光学装置であり、光学
装置１Ａは、図示しないレーザー光源、光学ユニット２
Ａ、および保持部材３Ａ等で構成されている。なお、７
は光ディスクであり、７ａは光ディスクの透明保護層で
ある。(First Embodiment) FIG. 1 is a rear view and a side sectional view showing a main part of an optical device according to an embodiment. As shown in FIG. 1, an optical device 1A is an optical device for an optical pickup having an optical unit 2A, and the optical device 1A is a laser light source (not shown) and an optical unit 2A.
A and a holding member 3A. Note that 7
Denotes an optical disk, and 7a denotes a transparent protective layer of the optical disk.
【００１４】光学ユニット２Ａは、第１光学素子４Ａと
第２光学素子５Ａで構成され、フランジ４ｂ、フランジ
５ｂで固定されている。また、光学ユニット２Ａは、第
１光学素子４Ａと第２光学素子５Ａで囲まれた空間２１
Ａを有し、保持部材３Ａにより保持されている。The optical unit 2A comprises a first optical element 4A and a second optical element 5A, and is fixed by a flange 4b and a flange 5b. The optical unit 2A has a space 21 surrounded by the first optical element 4A and the second optical element 5A.
A and is held by the holding member 3A.
【００１５】第１光学素子４Ａは、２つの有効光学面４
ａ、光軸Ｚに対し垂直方向に突出したフランジ４ｂ、第
２光学素子５Ａとの当接面４ｆ、第２光学素子との嵌合
部４ｇ、保持部材３Ａとの当接面４ｍ、保持部材３Ａと
の嵌合部４ｎをそれぞれ有している。また、第１光学素
子４Ａはプラスチック成形された正のレンズである。The first optical element 4A includes two effective optical surfaces 4
a, flange 4b projecting perpendicular to optical axis Z, contact surface 4f with second optical element 5A, fitting portion 4g with second optical element, contact surface 4m with holding member 3A, holding member Each has a fitting portion 4n with 3A. The first optical element 4A is a positive lens molded of plastic.
【００１６】また、第２光学素子５Ａは、２つの有効光
学面５ａ、光軸Ｚに対し垂直方向に突出したフランジ５
ｂ、第１光学素子４Ａとの当接面５ｆ、第１光学素子４
Ａとの嵌合部５ｇを有している。また、第２光学素子５
Ａはプラスチック成形された正のレンズである。The second optical element 5A includes two effective optical surfaces 5a and a flange 5 projecting in a direction perpendicular to the optical axis Z.
b, contact surface 5f with first optical element 4A, first optical element 4
A has a fitting portion 5g. Also, the second optical element 5
A is a plastic molded positive lens.
【００１７】空間２１Ａは第１光学素子４Ａの有効光学
面４ａ、第２光学素子５Ａの有効光学面５ａで囲まれた
空間である。また、気体流路２３Ａは第１光学素子４Ａ
及び第２光学素子５Ａの当接部の近傍に設けられ、光学
ユニット２Ａが保持部材３Ａに組込状態で、空間２１Ａ
内の気体である空気が外気８につながる流路である。The space 21A is a space surrounded by the effective optical surface 4a of the first optical element 4A and the effective optical surface 5a of the second optical element 5A. Further, the gas flow path 23A is the first optical element 4A.
And the optical unit 2A is provided in the vicinity of the contact portion of the second optical element 5A.
This is a flow path in which the air, which is the gas inside, is connected to the outside air 8.
【００１８】光学装置１Ａは光学ユニット２Ａに形成さ
れた気体流路２３Ａを塞ぐことなく光学ユニットを保持
している。保持部材３Ａは光学ユニット２Ａとの嵌合部
３ｇ、光学ユニット２Ａとの当接面３ｆを有し、光学ユ
ニット２Ａを保持している。The optical device 1A holds the optical unit without blocking the gas passage 23A formed in the optical unit 2A. The holding member 3A has a fitting portion 3g with the optical unit 2A and a contact surface 3f with the optical unit 2A, and holds the optical unit 2A.
【００１９】以上により、光学装置１Ａ、光学ユニット
２Ａは、空間２１Ａ内の空気は気体流路２３Ａにより外
気８とつながっているので、周囲温度変化による空気の
膨張または収縮による有効光学面の面精度の低下、温度
低下による結露等が生じ難くなっている。As described above, in the optical device 1A and the optical unit 2A, since the air in the space 21A is connected to the outside air 8 by the gas flow path 23A, the surface accuracy of the effective optical surface due to expansion or contraction of the air due to a change in ambient temperature. And dew condensation and the like due to a decrease in temperature are less likely to occur.
【００２０】（第２の実施の形態）この実施の形態は第
１の実施の形態における気体流路が異なる例である。機
構的に同じ部分は同一符号を付け一部説明を省略する。
図２は実施の形態の他の光学装置の要部構成を示す背面
図と側面断面図である。図２に示すように、光学装置１
Ｂは、光学ユニット２Ｂを有する光ピックアップ用の光
学装置であり、光学装置１Ｂは、図示しないレーザー光
源、光学ユニット２Ｂ、および保持部材３Ｂ等で構成さ
れている。(Second Embodiment) This embodiment is an example in which the gas flow path in the first embodiment is different. The same parts mechanically have the same reference numerals, and a part of the description will be omitted.
FIG. 2 is a rear view and a side cross-sectional view illustrating a main configuration of another optical device according to the embodiment. As shown in FIG.
B is an optical device for an optical pickup having an optical unit 2B, and the optical device 1B includes a laser light source (not shown), an optical unit 2B, a holding member 3B, and the like.
【００２１】光学ユニット２Ｂは、第１光学素子４Ｂと
第２光学素子５Ｂで構成され、空間２１Ｂを有してい
る。第１光学素子４Ｂと第２光学素子５Ｂはプラスチッ
ク成形された正のレンズである。空間２１Ｂは有効光学
面を含む第１光学素子４Ｂ及び第２光学素子５Ｂで囲ま
れた空間である。また、気体流路２３Ｂは第１光学素子
４ＢにＬ字状に形成され気体流路で、空間２１Ｂ内の空
気が外気８につながっている。The optical unit 2B comprises a first optical element 4B and a second optical element 5B, and has a space 21B. The first optical element 4B and the second optical element 5B are positive lenses molded of plastic. The space 21B is a space surrounded by the first optical element 4B and the second optical element 5B including the effective optical surface. The gas flow path 23B is an L-shaped gas flow path formed in the first optical element 4B, and the air in the space 21B is connected to the outside air 8.
【００２２】光学装置１Ｂは光学ユニット２Ｂに形成さ
れた気体流路２３Ｂを塞ぐことなく保持部材３Ｂにより
光学ユニット２Ｂを保持している。The optical device 1B holds the optical unit 2B by the holding member 3B without blocking the gas passage 23B formed in the optical unit 2B.
【００２３】以上により、光学装置１Ｂ、光学ユニット
２Ｂは、第１の実施の形態と同様に、空気の膨張、また
は収縮による有効光学面の面精度の低下、また、温度低
下による結露等が生じ難くなる。As described above, in the optical device 1B and the optical unit 2B, as in the first embodiment, the surface precision of the effective optical surface is reduced due to expansion or contraction of air, and dew condensation or the like occurs due to a decrease in temperature. It becomes difficult.
【００２４】（第３の実施の形態）この実施の形態は第
１の実施の形態における気体流路が異なる例である。機
構的に同じ部分は同一符号を付け一部説明を省略する。
図３は、実施の形態の他の光学装置の要部構成を示す側
面断面図である。図３に示すように、光学装置１Ｃは光
学ユニット２Ｃを有し、光ピックアップ用の装置であ
り、光学装置１Ｃは、図示しないレーザー光源、光学ユ
ニット２Ｃおよび保持部材３Ｃ等で構成されている。(Third Embodiment) This embodiment is an example in which the gas flow path in the first embodiment is different. The same parts mechanically have the same reference numerals, and a part of the description will be omitted.
FIG. 3 is a side cross-sectional view illustrating a main configuration of another optical device according to the embodiment. As shown in FIG. 3, the optical device 1C has an optical unit 2C and is a device for an optical pickup. The optical device 1C includes a laser light source (not shown), an optical unit 2C, a holding member 3C, and the like.
【００２５】光学ユニット２Ｃは、第１光学素子４Ｃと
第２光学素子５Ｃで構成され、空間２１Ｃを有してい
る。第１光学素子４Ｃと第２光学素子５Ｃはプラスチッ
ク成形された正のレンズである。空間２１Ｃは有効光学
面を含む第１光学素子４Ｃ及び第２光学素子５Ｃで囲ま
れた空間である。また、気体流路２３Ｃは第２光学素子
５Ｃ側に断面が直線状に形成され、空間２１Ｃの空気が
外気８につながる気体流路である。なお、気体流路を第
１光学素子４Ｃ側に設けてもよい。The optical unit 2C comprises a first optical element 4C and a second optical element 5C, and has a space 21C. The first optical element 4C and the second optical element 5C are positive lenses molded of plastic. The space 21C is a space surrounded by the first optical element 4C and the second optical element 5C including the effective optical surface. Further, the gas flow path 23C is a gas flow path whose cross section is formed linearly on the second optical element 5C side and in which the air in the space 21C is connected to the outside air 8. Note that the gas flow path may be provided on the first optical element 4C side.
【００２６】光学装置１Ｃは光学ユニット２Ｃに形成さ
れた気体流路２３Ｃを塞ぐことなく保持部材３Ｃにより
光学ユニット２Ｃを保持している。The optical device 1C holds the optical unit 2C by the holding member 3C without blocking the gas passage 23C formed in the optical unit 2C.
【００２７】以上により、光学装置１Ｃ、光学ユニット
２Ｃは、空気の膨張または収縮による有効光学面の面精
度の低下、また、温度低下による結露等が生じ難くな
る。As described above, in the optical device 1C and the optical unit 2C, the surface accuracy of the effective optical surface due to expansion or contraction of air is reduced, and dew condensation due to a decrease in temperature hardly occurs.
【００２８】（第４の実施の形態）この実施の形態は２
つの空間にそれぞれ気体流路がある例である。図４は、
実施の形態の他の光学装置の要部構成を示す側面断面図
である。図４に示すように、光学装置１Ｄは、被写体撮
影用の光学装置であり、光学装置１Ｄは、光学ユニット
２Ｄおよび保持部材３Ｄ等で構成されている。(Fourth Embodiment) In this embodiment,
This is an example in which two spaces each have a gas flow path. FIG.
FIG. 11 is a side sectional view illustrating a configuration of a main part of another optical device according to an embodiment. As shown in FIG. 4, the optical device 1D is an optical device for photographing a subject, and the optical device 1D includes an optical unit 2D, a holding member 3D, and the like.
【００２９】光学ユニット２Ｄは、第１光学素子４Ｄ、
第２光学素子５Ｄ、第３光学素子６Ｄで構成され、フラ
ンジ４ｂ、５ｂ、６ｂで固定されている。また、光学ユ
ニット２Ｄは空間２１１Ｄと空間２１２Ｄを有してい
る。The optical unit 2D includes a first optical element 4D,
It is composed of a second optical element 5D and a third optical element 6D, and is fixed by flanges 4b, 5b, 6b. The optical unit 2D has a space 211D and a space 212D.
【００３０】なお、隣接する光学素子の一方を第１光学
素子、他方を第２光学素子と呼ぶことにしているが、こ
こでは、第１光学素子４Ｄ、第２光学素子５Ｄが隣接し
た光学素子に相当し、第２光学素子５Ｄ、第３光学素子
６Ｄが隣接した光学素子に相当している。One of the adjacent optical elements is referred to as a first optical element, and the other is referred to as a second optical element. Here, the first optical element 4D and the second optical element 5D are adjacent to each other. , And the second optical element 5D and the third optical element 6D correspond to adjacent optical elements.
【００３１】第１光学素子４Ｄは、２つの有効光学面４
ａ、光軸Ｚに対し垂直方向に突出したフランジ４ｂ、第
２光学素子との当接面４ｆ、第２光学素子との嵌合部４
ｇを有している。また、第１光学素子４Ｄはプラスチッ
ク成形された正のレンズである。The first optical element 4D includes two effective optical surfaces 4
a, a flange 4b projecting in a direction perpendicular to the optical axis Z, a contact surface 4f with the second optical element, and a fitting portion 4 with the second optical element
g. The first optical element 4D is a positive lens formed by plastic molding.
【００３２】第２光学素子５Ｄは、２つの有効光学面５
ａ、光軸Ｚに対し垂直方向に突出したフランジ５ｂ、第
１光学素子との当接面５１ｆ、第１光学素子との嵌合部
５１ｇ、第３光学素子との当接面５２ｆ、第３光学素子
との嵌合部５２ｇ、保持部材３Ｄとの当接面５ｍ、保持
部材３Ｄとの嵌合部５ｎを有している。また、第２光学
素子５Ｄはプラスチック成形された負のレンズである。The second optical element 5D includes two effective optical surfaces 5
a, a flange 5b projecting in a direction perpendicular to the optical axis Z, a contact surface 51f with the first optical element, a fitting portion 51g with the first optical element, a contact surface 52f with the third optical element, a third It has a fitting portion 52g with the optical element, a contact surface 5m with the holding member 3D, and a fitting portion 5n with the holding member 3D. The second optical element 5D is a plastic molded negative lens.
【００３３】空間２１１Ｄは、有効光学面を含む第１光
学素子４Ｄ及び第２光学素子５Ｄで囲まれた空間であ
る。また、気体流路２３１Ｄは光学ユニット２Ｄが保持
部材３Ｄに組込まれた状態で、空間２１１Ｄの空気が外
気８につながる気体流路である。The space 211D is a space surrounded by the first optical element 4D and the second optical element 5D including the effective optical surface. The gas flow path 231D is a gas flow path in which the air in the space 211D is connected to the outside air 8 in a state where the optical unit 2D is incorporated in the holding member 3D.
【００３４】第３光学素子６Ｄは、２つの有効光学面６
ａ、光軸Ｚに対し垂直方向に突出したフランジ６ｂ、第
２光学素子との当接面６ｆ、第２光学素子との嵌合部６
ｇを有している。また、第２光学素子６Ｄはプラスチッ
ク成形された正のレンズである。The third optical element 6D includes two effective optical surfaces 6
a, a flange 6b projecting in a direction perpendicular to the optical axis Z, a contact surface 6f with the second optical element, a fitting portion 6 with the second optical element
g. The second optical element 6D is a positive lens molded of plastic.
【００３５】空間２１２Ｄは、有効光学面を含む第２光
学素子５Ｄ及び第３光学素子６Ｄで囲まれた空間であ
る。また、気体流路２３２Ｄは保持部材３Ｄに組込まれ
た状態で空間２１２Ｄの空気が外気８につながる気体流
路である。The space 212D is a space surrounded by the second optical element 5D and the third optical element 6D including the effective optical surface. The gas flow path 232D is a gas flow path in which the air in the space 212D is connected to the outside air 8 in a state where the gas flow path 232D is incorporated in the holding member 3D.
【００３６】光学装置１Ｄは光学ユニット２Ｄに形成さ
れた気体流路２３１Ｄ、２３２Ｄを塞ぐことなく保持部
材３Ｄにより光学ユニット２Ｄを保持している。保持部
材３Ｄは、光学ユニット２Ｄとの当接面３ｆが有り、光
学ユニット２Ｄとの嵌合部３ｇがある。The optical device 1D holds the optical unit 2D by the holding member 3D without blocking the gas channels 231D and 232D formed in the optical unit 2D. The holding member 3D has a contact surface 3f with the optical unit 2D, and has a fitting portion 3g with the optical unit 2D.
【００３７】以上により、光学装置１Ｄ、光学ユニット
２Ｄは、空気の膨張または収縮による有効光学面の面精
度の低下、また、温度低下による結露等が生じ難くな
る。As described above, in the optical device 1D and the optical unit 2D, the precision of the effective optical surface is reduced due to the expansion or contraction of the air, and dew condensation due to the temperature drop is less likely to occur.
【００３８】（第５の実施の形態）この実施の形態は中
間保持部材に気体流路がある例である。図５は実施の形
態の他の光学装置の要部構成を示す側面断面図である。
図５に示すように、光学装置１Ｅは光ピックアップ用の
装置であり、図示しないレーザー光源、光学ユニット２
Ｅおよび保持部材３Ｅ等で構成されている。(Fifth Embodiment) This embodiment is an example in which the intermediate holding member has a gas flow path. FIG. 5 is a side cross-sectional view illustrating a main configuration of another optical device according to the embodiment.
As shown in FIG. 5, an optical device 1E is a device for an optical pickup, and includes a laser light source (not shown) and an optical unit 2 (not shown).
E and a holding member 3E.
【００３９】光学ユニット２Ｅは第１光学素子４Ｅ、第
２光学素子５Ｅ及び中間保持部材９Ｅで構成され、空間
２１Ｅを有している。The optical unit 2E includes a first optical element 4E, a second optical element 5E, and an intermediate holding member 9E, and has a space 21E.
【００４０】第１光学素子４Ｅは、２つの有効光学面４
ａ、光軸Ｚに対し垂直方向に突出したフランジ４ｂ、中
間保持部材との当接面４ｆ、嵌合部４ｎを有している。
また、第１光学素子４Ｅはプラスチック成形された正の
レンズである。The first optical element 4E includes two effective optical surfaces 4
a, a flange 4b projecting in a direction perpendicular to the optical axis Z, a contact surface 4f with the intermediate holding member, and a fitting portion 4n.
The first optical element 4E is a positive lens formed by plastic molding.
【００４１】第２光学素子５Ｅは、２つの有効光学面５
ａ、光軸Ｚに対し垂直方向に突出したフランジ５ｂ、中
間保持部材との当接面５ｆ、嵌合部５ｇを有している。
また、第２光学素子５Ａはプラスチック成形された正の
レンズである。The second optical element 5E has two effective optical surfaces 5
a, a flange 5b projecting perpendicularly to the optical axis Z, a contact surface 5f with the intermediate holding member, and a fitting portion 5g.
The second optical element 5A is a positive lens formed of plastic.
【００４２】中間保持部材９Ｅは第１光学素子４Ｅと第
２光学素子５Ｅを保持している。中間保持部材９Ｅは第
１光学素子４Ｅと第２光学素子５Ｅの当接面９ｆ、第２
光学素子５Ｅの嵌合部９ｇ、第１光学素子４Ｅの嵌合部
９ｎ、保持部材３Ｅの当接面９ｍ、嵌合部９ｐを有して
いる。The intermediate holding member 9E holds the first optical element 4E and the second optical element 5E. The intermediate holding member 9E has a contact surface 9f between the first optical element 4E and the second optical element 5E.
It has a fitting portion 9g of the optical element 5E, a fitting portion 9n of the first optical element 4E, a contact surface 9m of the holding member 3E, and a fitting portion 9p.
【００４３】空間２１Ｅは、第１光学素子４Ｅ、第２光
学素子５Ｅ及び中間保持部材９Ｅで囲まれた空間であ
る。気体流路２３Ｅは中間保持部材９Ｅ側に断面が直線
状に形成され、光学ユニット２Ｅが保持部材３Ｅに組込
まれた状態で、空間２１Ｅの空気が外気８につながる気
体流路である。The space 21E is a space surrounded by the first optical element 4E, the second optical element 5E, and the intermediate holding member 9E. The gas flow path 23E is a gas flow path in which the cross section is formed linearly on the side of the intermediate holding member 9E, and the air in the space 21E is connected to the outside air 8 in a state where the optical unit 2E is incorporated in the holding member 3E.
【００４４】光学装置１Ｅは光学ユニット２Ｅに形成さ
れた気体流路２３Ｅを塞ぐことなく光学ユニットを保持
している。保持部材３Ｅは光学ユニット２Ｅとの嵌合部
３ｇ、光学ユニット２Ｅとの当接面３ｍ、気体流路２３
Ｅの塞ぎをなくす孔３ｐを有し、光学ユニット２Ｅを保
持している。The optical device 1E holds the optical unit without blocking the gas passage 23E formed in the optical unit 2E. The holding member 3E has a fitting portion 3g with the optical unit 2E, a contact surface 3m with the optical unit 2E, and a gas flow path 23.
It has a hole 3p for eliminating the blockage of E, and holds the optical unit 2E.
【００４５】以上により、光学装置１Ｅおよび光学ユニ
ット２Ｅは、空気の膨張または収縮による有効光学面の
面精度の低下、温度低下による結露等が生じ難くなる。As described above, in the optical device 1E and the optical unit 2E, the reduction of the surface accuracy of the effective optical surface due to the expansion or contraction of air, the dew condensation due to the temperature drop, and the like hardly occur.
【００４６】（第６の実施の形態）この実施の形態は第
５の実施の形態の変形例である。機構的に同じ部分は同
一符号を付け一部説明を省略する。図６は実施の形態の
他の光学装置の要部構成を示す側面断面図である。(Sixth Embodiment) This embodiment is a modification of the fifth embodiment. The same parts mechanically have the same reference numerals, and a part of the description is omitted. FIG. 6 is a side sectional view showing a main part configuration of another optical device according to the embodiment.
【００４７】図６に示すように、光学装置１Ｆは光ピッ
クアップ用の光学装置であり、図示しないレーザー光
源、光学ユニット２Ｆおよび保持部材３Ｆ等で構成され
ている。As shown in FIG. 6, the optical device 1F is an optical device for an optical pickup, and includes a laser light source (not shown), an optical unit 2F, a holding member 3F, and the like.
【００４８】光学ユニット２Ｆは、第１光学素子４Ｆ、
第２光学素子５Ｆ及び中間保持部材９Ｆで構成され、空
間２１Ｆを有している。第１光学素子４Ｆと第２光学素
子５Ｆはプラスチック成形された正のレンズである。中
間保持部材９Ｆは第１光学素子４Ｆと第２光学素子５Ｆ
を保持している。空間２１Ｆは、有効光学面を含む第１
光学素子４Ｆ、第２光学素子５Ｆ、中間保持部材９Ｆで
囲まれた空間である。また、気体流路２３Ｆは、第２光
学素子５Ｆ側に断面が直線状に形成され、光学ユニット
２Ｆが保持部材３Ｆに組込まれた状態で、空間２１Ｆの
空気が外気８につながる気体流路である。なお、気体流
路を第１光学素子４Ｆ側に設けてもよい。The optical unit 2F includes a first optical element 4F,
It is composed of a second optical element 5F and an intermediate holding member 9F, and has a space 21F. The first optical element 4F and the second optical element 5F are positive lenses molded of plastic. The intermediate holding member 9F includes a first optical element 4F and a second optical element 5F.
Holding. The space 21F is a first space including an effective optical surface.
This is a space surrounded by the optical element 4F, the second optical element 5F, and the intermediate holding member 9F. Further, the gas flow path 23F is a gas flow path in which the air in the space 21F is connected to the outside air 8 in a state where the cross section is formed linearly on the second optical element 5F side and the optical unit 2F is incorporated in the holding member 3F. is there. Note that the gas flow path may be provided on the first optical element 4F side.
【００４９】光学装置１Ｆは光学ユニット２Ｆに形成さ
れた気体流路２３Ｆを塞ぐことなく光学ユニットを保持
している。保持部材３Ｆは光学ユニット２Ｆを保持して
いる。The optical device 1F holds the optical unit without blocking the gas passage 23F formed in the optical unit 2F. The holding member 3F holds the optical unit 2F.
【００５０】以上により、光学装置１Ｆ及び光学ユニッ
ト２Ｆは、空気の膨張または収縮による有効光学面の面
精度の低下、また、温度低下による結露等が生じ難くな
る。As described above, in the optical device 1F and the optical unit 2F, the surface accuracy of the effective optical surface is reduced due to expansion or contraction of air, and dew condensation due to a decrease in temperature hardly occurs.
【００５１】なお、各実施の形態では気体流路について
は各１つ設けたが、これに限定するものではなく、例え
ば２つ又はそれ以上でもよい。In each embodiment, one gas flow path is provided. However, the present invention is not limited to this. For example, two or more gas flow paths may be provided.
【００５２】[0052]
【発明の効果】以上のように構成したので下記のような
効果を奏する。第１光学素子及び第２光学素子で囲まれ
た空間が存在しても、光学素子の有効光学面の面精度低
下、結露等が生じ難い光学ユニットおよび光学装置を提
供できる。さらに、第１光学素子、第２光学素子、及び
中間保持部材で囲まれた空間が存在しても、光学素子の
有効光学面の面精度低下、結露等が生じ難い光学ユニッ
トおよび光学装置を提供できる。According to the above configuration, the following effects can be obtained. Even if there is a space surrounded by the first optical element and the second optical element, it is possible to provide an optical unit and an optical device in which the surface precision of the effective optical surface of the optical element hardly deteriorates and dew condensation and the like hardly occur. Furthermore, even if there is a space surrounded by the first optical element, the second optical element, and the intermediate holding member, the present invention provides an optical unit and an optical device in which the surface precision of the effective optical surface of the optical element is hardly reduced, dew condensation, etc. it can.
【図１】実施の形態の光学装置の要部構成を示す背面図
と側面断面図である。FIG. 1 is a rear view and a side cross-sectional view illustrating a main configuration of an optical device according to an embodiment.
【図２】実施の形態の他の光学装置の要部構成を示す背
面図と側面断面図である。FIGS. 2A and 2B are a rear view and a side sectional view showing a main part configuration of another optical device according to the embodiment. FIGS.
【図３】実施の形態の他の光学装置の要部構成を示す側
面断面図である。FIG. 3 is a side cross-sectional view illustrating a main configuration of another optical device according to the embodiment.
【図４】実施の形態の他の光学装置の要部構成を示す側
面断面図である。FIG. 4 is a side cross-sectional view illustrating a configuration of a main part of another optical device according to the embodiment.
【図５】実施の形態の他の光学装置の要部構成を示す側
面断面図である。FIG. 5 is a side sectional view showing a configuration of a main part of another optical device according to the embodiment.
【図６】実施の形態の他の光学装置の要部構成を示す側
面断面図である。FIG. 6 is a side sectional view showing a configuration of a main part of another optical device according to the embodiment.
１Ａ〜１Ｆ 光学装置 ２Ａ〜２Ｆ 光学ユニット ２１Ａ〜２１Ｃ、２１１Ｄ、２１２Ｄ、２１Ｅ、２１Ｆ
空間 ２３Ａ〜２３Ｃ、２３１Ｄ、２３２Ｄ、２３Ｅ、２３Ｆ
気体流路 ３Ａ〜３Ｆ 保持部材 ４Ａ〜４Ｆ 第１光学素子 ４ａ、５ａ 有効光学面 ５Ａ〜５Ｆ 第２光学素子 ８ 外気 ９Ｅ、９Ｆ 中間保持部材 Ｚ 光軸1A to 1F Optical device 2A to 2F Optical unit 21A to 21C, 211D, 212D, 21E, 21F
Spaces 23A to 23C, 231D, 232D, 23E, 23F
Gas flow path 3A-3F Holding member 4A-4F First optical element 4a, 5a Effective optical surface 5A-5F Second optical element 8 Outside air 9E, 9F Intermediate holding member Z Optical axis
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ１１Ｂ 7/12 Ｇ１１Ｂ 7/12 7/135 7/135 Ａ Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) G11B 7/12 G11B 7/12 7/135 7/135 A
Claims (9)
光学面を有する第２光学素子とが一体化された光学ユニ
ットにおいて、少なくとも前記第１光学素子の有効光学
面と前記第２光学素子の有効光学面とで囲まれた空間
と、前記空間と外気との間に気体が流通する気体流路と
を備えたことを特徴とする光学ユニット。1. An optical unit in which a first optical element having an effective optical surface and a second optical element having an effective optical surface are integrated, at least an effective optical surface of the first optical element and the second optical element. An optical unit comprising: a space surrounded by the effective optical surface of (1), and a gas flow path through which gas flows between the space and the outside air.
前記第２光学素子とが当接または嵌合する位置の近傍に
設けられたことを特徴とする請求項１に記載の光学ユニ
ット。2. The optical unit according to claim 1, wherein the gas flow path is provided near a position where the first optical element and the second optical element are in contact with or fitted to each other. .
前記第２光学素子のいずれか一方に設けられたことを特
徴とする請求項１又は２に記載の光学ユニット。3. The optical unit according to claim 1, wherein the gas flow path is provided in one of the first optical element and the second optical element.
光学面を有する第２光学素子及び前記第１光学素子と前
記第２光学素子を保持する中間保持部材とを有し、前記
第１光学素子と前記第２光学素子とが前記中間保持部材
を介して一体化された光学ユニットにおいて、少なくと
も前記第１光学素子の有効光学面、前記第２光学素子の
有効光学面及び前記中間保持部材とで囲まれた空間と、
前記空間と外気との間に気体が流通する気体流路とを備
えたことを特徴とする光学ユニット。4. The first optical element having a first optical element having an effective optical surface, a second optical element having an effective optical surface, and an intermediate holding member that holds the first optical element and the second optical element. In an optical unit in which an optical element and the second optical element are integrated via the intermediate holding member, at least an effective optical surface of the first optical element, an effective optical surface of the second optical element, and the intermediate holding member And the space surrounded by
An optical unit, comprising: a gas flow path through which gas flows between the space and the outside air.
記第２光学素子及び前記中間保持部材とが当接または嵌
合する位置の近傍に設けられたことを特徴とする請求項
４に記載の光学ユニット。5. The gas flow path according to claim 4, wherein the gas flow path is provided near a position where the first optical element, the second optical element, and the intermediate holding member are in contact with or fitted to each other. An optical unit according to item 1.
記第２光学素子及び前記中間保持部材のいずれかに設け
られたことを特徴とする請求項４又は５に記載の光学ユ
ニット。6. The optical unit according to claim 4, wherein the gas flow path is provided in any one of the first optical element, the second optical element, and the intermediate holding member.
対物レンズであることを特徴とする請求項１から６のい
ずれか１項に記載の光学ユニット。7. The optical unit according to claim 1, wherein the optical unit is an objective lens for an optical pickup.
は、プラスチック成形されたものであることを特徴とす
る請求項１から７のいずれか１項に記載の光学ユニット8. The optical unit according to claim 1, wherein the first optical element or the second optical element is formed by plastic molding.
載の光学ユニットと、前記光学ユニットに形成された気
体流路を塞ぐことなく前記光学ユニットを保持する保持
部材とを備えたことを特徴とする光学装置。9. An optical unit according to claim 1, further comprising: a holding member configured to hold the optical unit without blocking a gas flow path formed in the optical unit. An optical device characterized by the above-mentioned.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001015799A JP2002221649A (en) | 2001-01-24 | 2001-01-24 | Optical unit and optical device |
| US10/050,560 US20020097508A1 (en) | 2001-01-24 | 2002-01-18 | Objective lens for use in optical pickup apparatus and optical pickup apparatus |
| US10/642,199 US6919996B2 (en) | 2001-01-24 | 2003-08-18 | Objective lens for use in optical pickup apparatus and optical pickup apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001015799A JP2002221649A (en) | 2001-01-24 | 2001-01-24 | Optical unit and optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002221649A true JP2002221649A (en) | 2002-08-09 |
Family
ID=18882286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001015799A Pending JP2002221649A (en) | 2001-01-24 | 2001-01-24 | Optical unit and optical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002221649A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002269794A (en) * | 2001-03-13 | 2002-09-20 | Konica Corp | Objective lens for optical pickup, and optical pickup |
| WO2003007044A1 (en) * | 2001-07-09 | 2003-01-23 | Sony Corporation | Objective lens, and optical pickup device using the objective lens |
| JP2005140848A (en) * | 2003-11-04 | 2005-06-02 | Sekinosu Kk | Image pickup lens |
| JP2006085837A (en) * | 2004-09-16 | 2006-03-30 | Konica Minolta Opto Inc | Objective lens unit and optical pickup device using the same |
| JP2006126284A (en) * | 2004-10-26 | 2006-05-18 | Konica Minolta Opto Inc | Objective lens and optical pickup with same |
| JP2008191280A (en) * | 2007-02-02 | 2008-08-21 | Topcon Corp | Lens module |
| US7719776B2 (en) | 2006-02-08 | 2010-05-18 | Ricoh Company, Limited | Lens unit, lens barrel, optical device, scanner, and image forming apparatus |
| JP2013231993A (en) * | 2013-07-01 | 2013-11-14 | Hitachi Maxell Ltd | Lens unit and camera module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5958411A (en) * | 1982-09-29 | 1984-04-04 | Hitachi Ltd | Compound member for optical instrument |
| JPS6169009A (en) * | 1984-09-13 | 1986-04-09 | Olympus Optical Co Ltd | Lens assembly |
| JPS62109128A (en) * | 1985-11-08 | 1987-05-20 | Matsushita Electric Ind Co Ltd | Information retrieval and display device |
| JPS62195614A (en) * | 1986-02-22 | 1987-08-28 | Ricoh Co Ltd | Plastic lens body structure |
| JPH03240008A (en) * | 1990-02-19 | 1991-10-25 | Fuji Photo Optical Co Ltd | Lens device |
| JP2000131508A (en) * | 1998-10-26 | 2000-05-12 | Sony Corp | Objective lens and its manufacture |
-
2001
- 2001-01-24 JP JP2001015799A patent/JP2002221649A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5958411A (en) * | 1982-09-29 | 1984-04-04 | Hitachi Ltd | Compound member for optical instrument |
| JPS6169009A (en) * | 1984-09-13 | 1986-04-09 | Olympus Optical Co Ltd | Lens assembly |
| JPS62109128A (en) * | 1985-11-08 | 1987-05-20 | Matsushita Electric Ind Co Ltd | Information retrieval and display device |
| JPS62195614A (en) * | 1986-02-22 | 1987-08-28 | Ricoh Co Ltd | Plastic lens body structure |
| JPH03240008A (en) * | 1990-02-19 | 1991-10-25 | Fuji Photo Optical Co Ltd | Lens device |
| JP2000131508A (en) * | 1998-10-26 | 2000-05-12 | Sony Corp | Objective lens and its manufacture |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002269794A (en) * | 2001-03-13 | 2002-09-20 | Konica Corp | Objective lens for optical pickup, and optical pickup |
| WO2003007044A1 (en) * | 2001-07-09 | 2003-01-23 | Sony Corporation | Objective lens, and optical pickup device using the objective lens |
| US7170693B2 (en) | 2001-07-09 | 2007-01-30 | Sony Corporation | Objective lens, and optical pickup device using the objective lens |
| JP2005140848A (en) * | 2003-11-04 | 2005-06-02 | Sekinosu Kk | Image pickup lens |
| JP2006085837A (en) * | 2004-09-16 | 2006-03-30 | Konica Minolta Opto Inc | Objective lens unit and optical pickup device using the same |
| JP2006126284A (en) * | 2004-10-26 | 2006-05-18 | Konica Minolta Opto Inc | Objective lens and optical pickup with same |
| US7719776B2 (en) | 2006-02-08 | 2010-05-18 | Ricoh Company, Limited | Lens unit, lens barrel, optical device, scanner, and image forming apparatus |
| JP2008191280A (en) * | 2007-02-02 | 2008-08-21 | Topcon Corp | Lens module |
| JP2013231993A (en) * | 2013-07-01 | 2013-11-14 | Hitachi Maxell Ltd | Lens unit and camera module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5614735A (en) | Semiconductor laser device | |
| JP3960330B2 (en) | Optical device connection structure, optical device, electronic equipment | |
| CN110187501B (en) | Electronic device including moisture-inducing structure | |
| JP2002221649A (en) | Optical unit and optical device | |
| US10942060B2 (en) | Blade drive module, imaging unit provided with blade drive module, and imaging device | |
| WO2006011594A1 (en) | Deformable mirror device, deformable mirror plate | |
| JP2013037244A (en) | Lens device and electronic apparatus | |
| JP3967851B2 (en) | Fly eye lens positioning structure | |
| JPS58130451A (en) | Information storage medium | |
| JP2005352932A (en) | Smoke sensor | |
| US20040212903A1 (en) | Object lens unit | |
| JP2002328117A (en) | Microphone for photoacoustic gas sensor, and manufacturing method therefor | |
| JP3370264B2 (en) | Optical module | |
| JP2007017698A (en) | Catoptric system assembling unit | |
| JPH11242148A (en) | Lens assembly and film with lens provided with it | |
| JP2002023270A (en) | Screen-holding structure | |
| JP2005189261A5 (en) | ||
| JP2003207661A (en) | Optical waveguide device | |
| JP4074090B2 (en) | Assembly lens and manufacturing method thereof | |
| JP2003075704A (en) | Optical unit and optical device | |
| JP4330154B2 (en) | Optical fiber with ferrule and method for manufacturing the same | |
| JP2005215503A (en) | Lens holding mechanism and lens unit | |
| JP7037113B2 (en) | Optical unit and manufacturing method of optical unit | |
| JP2011134431A (en) | Optical pickup device | |
| JP3115062B2 (en) | Optical information recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20071227 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100713 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100907 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20101109 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20110405 |