JPH03274536A - Optical device with stop device - Google Patents
Optical device with stop deviceInfo
- Publication number
- JPH03274536A JPH03274536A JP7478890A JP7478890A JPH03274536A JP H03274536 A JPH03274536 A JP H03274536A JP 7478890 A JP7478890 A JP 7478890A JP 7478890 A JP7478890 A JP 7478890A JP H03274536 A JPH03274536 A JP H03274536A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- stop
- light
- image pickup
- filter
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 59
- 230000002542 deteriorative effect Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 238000003384 imaging method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 239000005357 flat glass Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000002858 crystal cell Anatomy 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Diaphragms For Cameras (AREA)
- Blocking Light For Cameras (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は絞り装置を有する光学系に関し、特に絞り装置
の一部を構成する絞り羽根等の絞り部材の面が光軸に対
して適切な角度となるように設定して通過光量を制御す
ることにより、ＷＡ質の向上を図った例えばビデオカメ
ラ等に好適な絞り装置を有する光学系に関するものであ
る。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an optical system having an aperture device, and in particular, to an optical system having an aperture device such that the surface of an aperture member such as an aperture blade constituting a part of the aperture device is properly aligned with the optical axis. The present invention relates to an optical system having an aperture device suitable for, for example, a video camera, which aims to improve the WA quality by setting the angle so that the amount of light passing through is controlled.
（従来の技術）
近年ビデオカメラ等に用いられる絞り装置は撮像素子の
高感度化に伴い高輝度物体の撮影時においては註絞り装
置の絞り関口を極めて小さくすることが要望されている
。(Prior Art) In recent years, as the sensitivity of image pickup devices has become higher in aperture devices used in video cameras and the like, it has become necessary to make the aperture entrance of the aperture device extremely small when photographing a high-luminance object.
しかしながら絞り開口を小さくすると、誠絞り開口より
回折現象が起こり撮像素子面上に不要な光が入射し画質
が低下する等の光学的な問題点が生じてくる。However, if the diaphragm aperture is made small, optical problems arise such as a diffraction phenomenon occurring from the true diaphragm aperture, which causes unnecessary light to be incident on the surface of the image sensor, resulting in a reduction in image quality.
又絞り開口の開口径の設定精度が十分確保することがで
きなく２良好なる露光制御が難しくなってくる等の構造
的な問題点も生じてくる。Further, structural problems arise, such as insufficient setting accuracy of the aperture diameter of the diaphragm aperture, making it difficult to achieve good exposure control.
この為従来より上記の問題点を解決するために絞り装置
を構成する絞り部材としての絞り羽根の一部に例＾ば撮
像素子等に入射する光量を減する作用を有するＮＤフィ
ルターを接着し、絞り径を小さくしなければならないと
きは、絞り径を小さくする代わりにこのＮＤフィルター
を光路中心に挿着する様に構成した絞り装置が実用化さ
れている。For this reason, conventionally, in order to solve the above-mentioned problems, an ND filter that has the effect of reducing the amount of light incident on an image sensor, etc., for example, is glued to a part of the aperture blade as the aperture member constituting the aperture device. When it is necessary to reduce the diameter of the aperture, a diaphragm device has been put into practical use in which an ND filter is inserted in the center of the optical path instead of reducing the diameter of the aperture.
しかしながら撮像素子の撮像面の反射率は一般に高い為
、この撮像面と平行に配置した前記ＮＤフィルターとの
間で相互反射が起こり、これにより高輝度物体の撮影時
に有害なフレアーやゴースト等が発生してくるという問
題点があった。However, since the reflectance of the imaging surface of an image sensor is generally high, mutual reflection occurs between this imaging surface and the ND filter placed parallel to it, which causes harmful flare and ghosts when photographing high-brightness objects. There was a problem with this.
そこで従来よりその対策として第３図〜第５図に示す様
に絞り部材に貼着したＮＤフィルターをある一定の位置
より折曲して構成した絞り装置が提案されている。As a countermeasure against this problem, a diaphragm device has been proposed in which an ND filter attached to a diaphragm member is bent from a certain position as shown in FIGS. 3 to 5.
第３図は従来の絞り装置の要部概略図、第４図は第３図
に示した絞り装置３３に用いられる絞り羽根３３ａの平
面図、第５図は第４図に示した較り羽根３３ａのＡ−Ａ
’總断面図である。FIG. 3 is a schematic diagram of the main parts of a conventional aperture device, FIG. 4 is a plan view of an aperture blade 33a used in the aperture device 33 shown in FIG. 3, and FIG. 5 is a diaphragm blade shown in FIG. 33a A-A
'This is a complete cross-sectional view.
従来の絞り装置３３は絞り開口が最小絞り側に設定され
る際、絞り羽根３３ａの一部に形成された入射光量を減
衰させる作用を有するＮＤフィルター３６の光減衰部が
その開口をおおう様に構成されている。このとき該光減
衰部が絞り羽根３３ａから折曲して形成されている為に
撮像面で反射した不要な反射光が光減衰部で反射しても
フレアーやゴースト等のノイズ像が形成しない様に構成
している。In the conventional aperture device 33, when the aperture aperture is set to the minimum aperture side, the aperture is covered by a light attenuating part of an ND filter 36 formed on a part of the aperture blade 33a and having the function of attenuating the amount of incident light. It is configured. At this time, since the light attenuation section is formed by bending from the aperture blade 33a, noise images such as flare and ghosts are not formed even if unnecessary reflected light reflected from the imaging surface is reflected at the light attenuation section. It is composed of
具体的に示すとＮＤフィルター３６を予め略「へ」の字
状に２つの面から構成し第４図に示す様にＡ−Ａ’線に
沿い第５図に示す様に角度ｂ０に折曲加工して絞り羽根
３３ａの一部に接着している。To be more specific, the ND filter 36 is constructed in advance from two surfaces approximately in the shape of a "he" shape, and is bent at an angle b0 as shown in FIG. 5 along the line A-A' as shown in FIG. It is processed and adhered to a part of the aperture blade 33a.
これにより撮像素子３４の撮像面からの不要な反射光を
ＮＤフィルター３６で光路外へ反射させて有害なゴース
トやフレア等の発生を除去している。As a result, unnecessary reflected light from the imaging surface of the image sensor 34 is reflected out of the optical path by the ND filter 36, thereby eliminating harmful ghosts, flares, and the like.
（発明が解決しようとする問題点）
しかしながら従来の絞り装置は光減衰部としてのＮＤフ
ィルターをセルロース系の材質で形成して該ＮＤフィル
ターを折曲して絞り羽根に接着していた為に環境条件の
変化例えば高温、高温になるとその折曲げ角度が元に戻
ってしまったりして折曲げ角度を良好に維持することが
できず、又折曲そのものの角度精度が悪く、これにより
撮像面からの不要な反射光をＮｒ）フィルターより光路
外へ反射させることが難しいという問題点があった。(Problems to be Solved by the Invention) However, in the conventional aperture device, the ND filter as a light attenuation part was made of cellulose material, and the ND filter was bent and glued to the aperture blades, which caused environmental problems. When the conditions change, for example when the temperature rises, the bending angle returns to its original value, making it impossible to maintain a good bending angle.Furthermore, the angular accuracy of the bending itself is poor, resulting in There was a problem in that it was difficult to reflect unnecessary reflected light from the Nr) filter out of the optical path.
本発明は絞り装置ｌｌを、その一部を構成する絞り部材
の面を、その光学系の光軸に垂直な面に対して所定量効
果的に傾けて光学系に配設することにより、撮像面から
の不要な反射光が絞り部材の面で反射したとき光路外に
射出しゴーストやフレアー等が発生しないように構成し
た絞り装置を有する光学系の盪供を目的とする。The present invention provides an imaging system in which the diaphragm device 11 is disposed in an optical system with the surface of the diaphragm member constituting a part of the diaphragm device effectively tilted by a predetermined amount with respect to a plane perpendicular to the optical axis of the optical system. An object of the present invention is to provide an optical system having a diaphragm device configured to prevent unnecessary reflected light from a surface from being emitted out of the optical path and causing ghosts, flares, etc. when reflected by the surface of a diaphragm member.
（問題点を解決するための手段）
本発明の絞り装置を有する光学系は、絞り装置をその一
部を構成する絞り部材の面が光学系の光軸に垂直な面に
対して傾きをもつように該光学系に配設したことを特徴
としている。(Means for Solving the Problems) An optical system having an aperture device of the present invention has a surface of an aperture member constituting a part of the aperture device that is inclined with respect to a plane perpendicular to the optical axis of the optical system. It is characterized in that it is arranged in the optical system as shown in FIG.
（実施例） 第１図は本発明の一実施例の要部概略図である。(Example) FIG. 1 is a schematic diagram of essential parts of an embodiment of the present invention.
同図において６は高輝度物体としての太陽である。ｌは
ズーム光学系、１０は較り装置、３は絞り装置ｌＯの一
部を構成する絞り部材としての較り羽根である。同図で
は絞り装置１１０を紋り羽根３の絞り羽根面３ａか光軸
りに垂直な面に対して被写体側に角度α３傾くように装
着している。In the figure, 6 is the sun as a high brightness object. 1 is a zoom optical system, 10 is a compensating device, and 3 is a compensating blade as an aperture member constituting a part of the aperture device 1O. In the figure, the diaphragm device 110 is mounted so as to be inclined at an angle α3 toward the subject with respect to the diaphragm blade surface 3a of the diaphragm blade 3 or a plane perpendicular to the optical axis.
絞り羽根面３ａはその一部の面上に入射光量を減衰させ
る作用を有する光減１１部としてのＮＤフィルターか接
着されており２１ｔ！述する撮像素子の撮像面４ａへの
入射光量を減衰させている。An ND filter serving as a light attenuator 11 having the effect of attenuating the amount of incident light is glued onto a part of the aperture blade surface 3a, and 21t! The amount of light incident on the imaging surface 4a of the image sensor described above is attenuated.
２はリレー光学系てあり、ズーム光学系ｌと共に撮影系
を構成している。４は撮像素子であり例えばＣＣＤ＄か
ら成っている。尚りは撮影系の光軸である。Reference numeral 2 denotes a relay optical system, which together with the zoom optical system 1 constitutes a photographing system. Reference numeral 4 denotes an image sensor, which is made up of, for example, a CCD. This is the optical axis of the photographing system.
本実施例において太陽６等の高−度物体からの光束はズ
ーム光学系ｌを通り絞り装置ｌｏの絞り開口部を通過し
そしてリレー光学系２を通って撮像素子４の撮像面４ａ
上に結蒙している。In this embodiment, a luminous flux from a high-power object such as the sun 6 passes through a zoom optical system l, passes through an aperture opening of an aperture device lo, passes through a relay optical system 2, and passes through an imaging surface 4a of an image sensor 4.
It's condensing on top.
このとき榔像面４ａは一般に数パーセントの高い反射率
を有している為撮像面４ａに入射した光束の一部は該撮
像面４ａで反射し再度リレー光学系２を逆方向へ向かい
リレー光学系２の一部や絞り羽根３ａ＄て反射し再び撮
像面４ｍに入射しフレアーやゴースト等の不要な光とな
り画質を低下させる原因となってくる。At this time, since the image plane 4a generally has a high reflectance of several percent, a part of the light beam incident on the image plane 4a is reflected by the image plane 4a, and goes through the relay optical system 2 in the opposite direction again to form the relay optical system. The light is reflected by a part of the system 2 and the aperture blade 3a and enters the image pickup surface 4m again, resulting in unnecessary light such as flare and ghost, which causes deterioration of image quality.
特に撮像面４ａで反射し、リレー光学系２を通過し絞り
羽根３の絞り羽根面３ａ上に接着したＮＤフィルターで
反射して不要な反射光となるものがある。In particular, some light is reflected by the imaging surface 4a, passes through the relay optical system 2, and is reflected by the ND filter bonded to the aperture blade surface 3a of the aperture blade 3, resulting in unnecessary reflected light.
そこで本実施例ではＮＤフィルターで反射した不要な反
射光が撮像面４ａに再入射しない様に絞り羽根３の絞り
羽根面３ａを光軸りに垂直な面に対して同図に示す様に
角度α°だけ被写体側に傾けている。Therefore, in this embodiment, the aperture blade surface 3a of the aperture blade 3 is set at an angle as shown in the figure with respect to a plane perpendicular to the optical axis so that unnecessary reflected light reflected by the ND filter does not re-enter the imaging surface 4a. It is tilted towards the subject by α°.
そして絞り羽根面３ａ上に接着されたＮＤフィルターに
より撮像面４ａで反射した不要な反射光を光路外へ反射
させ、これにより撮像面４ａに再入射する有害なゴース
トやフレアー等の発生を効果的に除去している。Then, the unnecessary reflected light reflected from the imaging surface 4a is reflected out of the optical path by the ND filter bonded on the aperture blade surface 3a, thereby effectively preventing the occurrence of harmful ghosts, flares, etc. that re-enter the imaging surface 4a. It has been removed.
尚、従来の絞り装置ではＮＤフィルターを折曲加工し、
絞り羽根に接着して不要な反射光を光路外に反射させる
構成を用いていたが、本実施例では絞り部材としての絞
り羽根３それ自体を光軸りの垂直面に対して角度α０傾
けている。これにより第６図に示す様に絞り羽根面３畠
と平行にしてＮＤフィルター７を接着することができる
ので組立加工を容易に行うことがてきる。尚第６図は本
発明の一実施例の絞り羽根３の１４５図と同様のＡ−Ａ
’線断面図である。In addition, in conventional aperture devices, the ND filter is bent,
A configuration was used in which unnecessary reflected light is reflected out of the optical path by being glued to the aperture blades, but in this embodiment, the aperture blades 3 themselves as the aperture member are tilted at an angle α0 with respect to a plane perpendicular to the optical axis. There is. As a result, as shown in FIG. 6, the ND filter 7 can be bonded parallel to the aperture blade surface 3, making assembly easier. In addition, FIG. 6 is an A-A similar to FIG. 145 of the aperture blade 3 of one embodiment of the present invention.
'It is a line cross-sectional view.
この様に本実施例ては撮像素子の高感度化に伴い小絞り
時に絞り開口より生ずる回折による画質低下を、ＮＤフ
ィルターを絞り羽根面の一部に接着し、ｆｉＮＤフィル
ターにより透過光量を減じて防止している。そしてこの
ときＮＤフィルターの面て反射した光によるゴーストの
発生を防止する為、絞り部材（絞り羽根）それ自体を光
軸に垂直な面に対して所定量効果的に傾けることにより
、ＮＤフィルターを折曲することなく不要な反射光を光
路外に反射させこれによりゴーストの発生を防いでいる
。In this way, in this example, an ND filter is glued to a part of the diaphragm blade surface, and the amount of transmitted light is reduced by a fiND filter, in order to reduce the image quality due to diffraction caused by the aperture when the aperture is small due to the increase in sensitivity of the image sensor. It is prevented. At this time, in order to prevent the occurrence of ghosts due to light reflected from the surface of the ND filter, the ND filter is Unnecessary reflected light is reflected out of the optical path without being bent, thereby preventing the occurrence of ghosts.
尚本実施例においては光減衰部としてＮＤフィルターを
用いたか、該ＮＤフィルターに限らず画像特性を劣化す
ることなく光減衰機能を有するものであれば何を用いて
も良い。In this embodiment, an ND filter is used as the light attenuation section, but it is not limited to the ND filter, but any other device may be used as long as it has a light attenuation function without deteriorating the image characteristics.
第２図は本発明の他の一実施例の要部概略図である。同
図において第１図に示した要素と同一要素には同符番を
付している。FIG. 2 is a schematic diagram of main parts of another embodiment of the present invention. In this figure, the same elements as those shown in FIG. 1 are given the same reference numerals.
本実施例において絞り装置２０の一部を構成する絞り部
材５としては液晶等から成り入射光量に応じて透過率が
変化するようにした所謂物性絞り部材（例λば液晶セル
ガラス）を用いている。In this embodiment, the aperture member 5 constituting a part of the aperture device 20 is a so-called physical aperture member (e.g., liquid crystal cell glass) made of liquid crystal or the like and whose transmittance changes depending on the amount of incident light. There is.
本実施例における物性絞り部材５は多くの場合液晶等を
収容する為の２枚の平面ガラスより形成されている。In most cases, the physical aperture member 5 in this embodiment is formed of two plane glasses for accommodating a liquid crystal or the like.
本実施例においては物性絞り部材５を構成する平面ガラ
スの表面５ａで前述した様に撮像素子４の撮像面４ａで
反射された不要な反射光が該平面ガラスの表面５ａで反
射し撮像面４ａに再入射するのを防ぐ為、前述の実施例
と同様に平面ガラスの表面ｐａを光軸りに垂直な面に対
して同図に示す様に角度ａ°被写体側に傾けている。In this embodiment, unnecessary reflected light reflected by the imaging surface 4a of the image sensor 4 is reflected by the surface 5a of the flat glass constituting the physical property aperture member 5, as described above, and is reflected by the surface 5a of the flat glass. In order to prevent the light from entering again, the surface pa of the flat glass is tilted toward the subject at an angle a° with respect to a plane perpendicular to the optical axis, as shown in the figure, as in the previous embodiment.
これにより平面ガラスの表面５ａで反射された撮像面４
ａからの不要な反射光を光路外へ反射させ、これにより
有害なゴースト、フレアー等の発生を効果的に除去して
いる。As a result, the imaging surface 4 reflected by the surface 5a of the flat glass
Unnecessary reflected light from a is reflected out of the optical path, thereby effectively eliminating the occurrence of harmful ghosts, flares, etc.
尚本実施例において絞り部材の面の傾き方向はｍｓ面の
短辺方向、即ち上下方向で、かつ太陽の様な高輝度光源
は、撮影時は光軸より上側にあることが多い為小さな傾
きにしか配置出来ない時はレンズ水平位置にて絞り部材
の上部がピント面側に近くなる様に傾けて構成するのが
より画質の向上を図ることができる。In this example, the direction of inclination of the surface of the diaphragm member is the short side direction of the ms plane, that is, the vertical direction, and since high-intensity light sources such as the sun are often located above the optical axis during shooting, the inclination is small. If the aperture member can only be placed in the horizontal position, the image quality can be further improved by tilting the aperture member so that the upper part of the aperture member is closer to the focal plane side when the lens is in a horizontal position.
具体的に示すと傾きが７°以下の場合は、絞り部材の面
を光学系の光軸に垂直な面に対してピント面への傾きに
設定するのが良い。Specifically, when the inclination is 7 degrees or less, it is preferable to set the surface of the diaphragm member to be inclined toward the focal plane with respect to the plane perpendicular to the optical axis of the optical system.
傾き角度が７°度を越えて配置出来る場合は、特にどの
方向に傾むけてもすべての方向の光源に対してゴースト
、フレアーとならない為、どの向きに配置してもかまわ
ない。If the tilt angle exceeds 7 degrees, it does not matter which direction the light source is tilted, since no ghost or flare will occur to light sources in any direction.
但しこの角度は光学系ごとに多少異なる為、余裕が必要
である。However, since this angle differs somewhat depending on the optical system, a margin is required.
尚本実施例においては絞り部材それ自体を傾けて配設す
る為に光学系を構成する際は絞り装置の位置する前後の
１ノンズを凸面から成るレンズで構成すわばスペース的
にも効率良く各光学要素を配置することができる。In this embodiment, since the diaphragm member itself is arranged at an angle, when configuring the optical system, one lens in front and the rear where the diaphragm device is located is constructed with convex lenses. Optical elements can be placed.
（発明の効果）
本発明によれば絞り装置をその一部を構成する絞り部材
の面が光字系の光軸に垂直な面に対して所定量効果的に
傾きをもたせて配設することにより、例えば光減衰機能
として用いるＮＤフィルターを折曲することなく絞り部
材としての絞り羽根の一部に容易に接着することができ
、これにより組立加工を容易にし、かつ絞り羽根その物
の梨地処理を不用とすることができ２又ゴーストや回折
現象等による画質低下を良好に防止することができる簡
易な構成の絞り装置を有する光学系を達成することがで
きる。(Effects of the Invention) According to the present invention, the diaphragm device is arranged such that the surface of the diaphragm member constituting a part of the diaphragm device is effectively tilted by a predetermined amount with respect to a plane perpendicular to the optical axis of the optical system. Therefore, for example, an ND filter used as a light attenuation function can be easily attached to a part of the aperture blade as an aperture member without bending it. It is possible to achieve an optical system having a diaphragm device with a simple configuration, which can eliminate the need for a diaphragm device and can satisfactorily prevent deterioration in image quality due to bifurcated ghosts, diffraction phenomena, and the like.
第１図は本発明の一実施例の妻部概略図、第２図は本発
明の他の一実施例の要部概略図、第３図は従来の絞り装
置の要部構成図、第４図は第３図に示した絞り装置に用
いられる絞り羽根の平面図、ＩＪ５図は第４図に示した
絞り羽根のＡ−Ａ線断面図、第６図は本発明の一実施例
の絞り羽根の第５図と同様のＡ−Ａ’線断面図である。
図中、１０．２０は絞り装！、ｌはズーム光学系、２は
リレー光学系、３は絞り部材（絞り羽根）、４は撮像素
子、５は物性絞り部材（液晶セルガラス）、３ａは絞り
羽根面、４ａは撮像面、５ａは平行ガラスの表面、６は
太陽、７はＮＤフィルター、Ｌは光軸である。FIG. 1 is a schematic diagram of the end portion of one embodiment of the present invention, FIG. 2 is a schematic diagram of the main part of another embodiment of the invention, FIG. 3 is a configuration diagram of the main part of a conventional aperture device, and FIG. The figure is a plan view of the aperture blade used in the aperture device shown in Figure 3, Figure IJ5 is a sectional view taken along line A-A of the aperture blade shown in Figure 4, and Figure 6 is an aperture of an embodiment of the present invention. FIG. 5 is a sectional view taken along line AA' of the blade, similar to FIG. 5; In the diagram, 10.20 is a diaphragm! , l is a zoom optical system, 2 is a relay optical system, 3 is an aperture member (aperture blade), 4 is an image pickup element, 5 is a physical aperture member (liquid crystal cell glass), 3a is an aperture blade surface, 4a is an imaging surface, 5a is the parallel glass surface, 6 is the sun, 7 is the ND filter, and L is the optical axis.
Claims (2)
学系の光軸に垂直な面に対して傾きをもつように該光学
系に配設したことを特徴とする絞り装置を有する光学系
。(1) A diaphragm device is provided in the optical system such that the surface of the diaphragm member constituting a part of the diaphragm device is inclined with respect to a plane perpendicular to the optical axis of the optical system. Optical system.
絞り部材と共に前記光学系を通過する光量を制御してい
ることを特徴とする請求項１記載の絞り装置を有する光
学系。(2) An optical system having an aperture device according to claim 1, characterized in that an ND filter is attached to a surface of the aperture member to control the amount of light passing through the optical system together with the aperture member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7478890A JPH03274536A (en) | 1990-03-24 | 1990-03-24 | Optical device with stop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7478890A JPH03274536A (en) | 1990-03-24 | 1990-03-24 | Optical device with stop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03274536A true JPH03274536A (en) | 1991-12-05 |
Family
ID=13557379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7478890A Pending JPH03274536A (en) | 1990-03-24 | 1990-03-24 | Optical device with stop device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03274536A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590465U (en) * | 1992-04-30 | 1993-12-10 | 日本信号株式会社 | Camera and camera housing |
| JP2004053633A (en) * | 2002-07-16 | 2004-02-19 | Olympus Corp | Imaging apparatus |
| JP2012177729A (en) * | 2011-02-25 | 2012-09-13 | Hoya Corp | Imaging unit |
-
1990
- 1990-03-24 JP JP7478890A patent/JPH03274536A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590465U (en) * | 1992-04-30 | 1993-12-10 | 日本信号株式会社 | Camera and camera housing |
| JP2004053633A (en) * | 2002-07-16 | 2004-02-19 | Olympus Corp | Imaging apparatus |
| JP4508521B2 (en) * | 2002-07-16 | 2010-07-21 | オリンパス株式会社 | Imaging device |
| JP2012177729A (en) * | 2011-02-25 | 2012-09-13 | Hoya Corp | Imaging unit |
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