JPH06167676A - Interchangeable lens for still video camera - Google Patents
Interchangeable lens for still video cameraInfo
- Publication number
- JPH06167676A JPH06167676A JP4339541A JP33954192A JPH06167676A JP H06167676 A JPH06167676 A JP H06167676A JP 4339541 A JP4339541 A JP 4339541A JP 33954192 A JP33954192 A JP 33954192A JP H06167676 A JPH06167676 A JP H06167676A
- Authority
- JP
- Japan
- Prior art keywords
- still video
- interchangeable lens
- camera
- video camera
- pass 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
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、銀塩カメラ本体に装着
する電子スチルビデオカメラのための交換レンズに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interchangeable lens for an electronic still video camera mounted on a silver halide camera body.
【０００２】[0002]
【従来の技術】従来、電子スチルカメラで銀塩カメラの
背蓋に撮像素子や信号処理回路等を搭載したもの、いわ
ゆるスチルビデオバックに交換して、銀塩カメラを電子
スチルカメラとして使用できるものが提案されている。
図２はこのような従来例の概略構成を示し、銀塩カメラ
の背蓋を除いたカメラ本体１の後面側に装着したスチル
ビデオバック１０には、その前面部の撮影光学系（不図
示）の光軸上に当たる位置に光学ローパスフイルタと赤
外線をカットするＩＲカットフイルタを含む光学フイル
タ１１が、その後方にミラー１２がそれぞれ設けられ、
このミラー１２の反射光路上には１次ピント面Ｐに結像
した像を再結像させるためのエレクターレンズ群１３及
び２次結像面となる固体撮像素子１４が配設され、ま
た、その両端部には信号処理回路１５及び画像信号を記
録信号媒体に記録するための記録装置１６が、それぞれ
設けられている。2. Description of the Related Art Conventionally, an electronic still camera having an image pickup device, a signal processing circuit and the like mounted on the back cover of a silver salt camera, which can be used as an electronic still camera by replacing it with a so-called still video back. Is proposed.
FIG. 2 shows a schematic configuration of such a conventional example. In a still video back 10 mounted on the rear surface side of the camera body 1 excluding the back cover of a silver halide camera, a photographing optical system (not shown) on the front surface thereof is provided. An optical filter 11 including an optical low-pass filter and an IR cut filter for cutting infrared rays is provided at a position on the optical axis of, and a mirror 12 is provided behind the optical filter 11.
An erector lens group 13 for re-imaging the image formed on the primary focus surface P and a solid-state image sensor 14 serving as a secondary image forming surface are arranged on the reflection optical path of the mirror 12, and A signal processing circuit 15 and a recording device 16 for recording an image signal on a recording signal medium are provided at both ends.
【０００３】このように銀塩カメラの背蓋部分にスチル
ビデオバックを取り付けたタイプの電子スチルカメラで
は、前述したようにフイルム面に１次結像した像を再度
結像させた２次結像面に撮像素子１４を配置していた。
この１次結像面に固体撮像素子を配置できない理由は、
一般に銀塩カメラで背蓋が交換可能なものは一眼レフカ
メラと呼ばれる撮影レンズが交換可能なカメラである。
この一眼レフカメラはフイルム面の直前にフォーカルプ
レーンシャッタが配置されているため、フイルム面に撮
像素子を配置すると、前述の光学フイルタを配置するス
ペースがなくなるからである。As described above, in the electronic still camera of the type in which the still video back is attached to the back cover portion of the silver halide camera, as described above, the secondary image is formed by re-imaging the image primarily formed on the film surface. The image pickup device 14 was arranged on the surface.
The reason why the solid-state image sensor cannot be arranged on this primary image plane is
Generally, a silver-salt camera whose back cover is replaceable is a camera whose interchangeable lens is called a single-lens reflex camera.
This single-lens reflex camera has the focal plane shutter arranged immediately in front of the film surface, and therefore, when the image pickup element is arranged on the film surface, there is no space for arranging the optical filter.
【０００４】[0004]
【発明が解決しようとする課題】ところが、前述従来例
では一次ピント面（フイルム面）に撮像素子を取り付け
られないために、次のような欠点があった。 （１）再結像させるための光学系が必要となり、該光学
系の調整が必要である。 （２）構造が複雑になり、大型化する。 （３）コストが上がる。However, the conventional example described above has the following drawbacks because the image pickup device cannot be attached to the primary focus surface (film surface). (1) An optical system for re-imaging is required, and adjustment of the optical system is required. (2) The structure becomes complicated and the size becomes large. (3) Cost increases.
【０００５】本発明は、前述従来例の欠点を除去し、構
造が簡単でかつ小型化できるスチルビデオカメラ用交換
レンズを提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide an interchangeable lens for a still video camera which eliminates the above-mentioned drawbacks of the conventional example and has a simple structure and can be miniaturized.
【０００６】[0006]
【課題を解決するための手段】前述の目的を達成するた
めに、本発明のスチルビデオカメラ用交換レンズは光学
的ローパスフイルタをレンズ群内に内蔵したものであ
る。また、該光学的ローパスフイルタは交換レンズの有
効光束の径が最小の位置に配置することが好ましい。In order to achieve the above object, the interchangeable lens for a still video camera according to the present invention has an optical low pass filter built in a lens group. Further, it is preferable that the optical low-pass filter is arranged at a position where the diameter of the effective light flux of the interchangeable lens is minimum.
【０００７】[0007]
【作用】以上の構成のスチルビデオカメラ用交換レンズ
は、スチルビデオバックの１次ピント面に固体撮像素子
をカメラ本体側の構成部材に影響することなく取り付け
ることが可能となる。また、光学的ローパスフイルタは
交換レンズの有効光束の径が最小の位置に配置すること
により、ローパスフイルタの径が小さくでき、低コスト
となりかつスペースをとることなく配置できる。In the interchangeable lens for a still video camera having the above structure, the solid-state image sensor can be attached to the primary focus surface of the still video back without affecting the constituent members on the camera body side. Further, by arranging the optical low-pass filter at the position where the diameter of the effective light flux of the interchangeable lens is the minimum, the diameter of the low-pass filter can be made small, so that the cost can be reduced and the space can be arranged without taking up space.
【０００８】[0008]
【実施例】以下、本発明の実施例を図１に基づいて説明
する。図において、２１はスチルビデオカメラ用交換レ
ンズで、レンズ群２２及び光学的ローパスフイルタ２３
を内蔵している。そして、該光学的ローパスフイルタ２
３の配置位置はレンズ群２２の有効光束の径が最小にな
る位置に配置してローパスフイルタの径が最小になるよ
うに設定してある。２４はスチルビデオバックで、その
内部には１次ピント面Ｐ（フイルム面）に固体撮像素子
２５が配置され、その側部に信号処理回路２６及び他の
電子部品を備えている。なお、１は銀塩カメラの背蓋を
除いたカメラ本体であり、その内部にはクイックリター
ンミラー２及びフォーカルプレーンシャッタ３等の構成
部品を有している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In the figure, reference numeral 21 denotes an interchangeable lens for a still video camera, which includes a lens group 22 and an optical low-pass filter 23.
Built in. Then, the optical low-pass filter 2
The arrangement position of 3 is set at a position where the diameter of the effective light flux of the lens group 22 is minimized so that the diameter of the low-pass filter is minimized. A still video bag 24 has a solid-state image sensor 25 arranged on the primary focus plane P (film plane) inside, and a signal processing circuit 26 and other electronic parts on its side. Reference numeral 1 denotes a camera body excluding the back cover of the silver halide camera, which has components such as a quick return mirror 2 and a focal plane shutter 3 therein.
【０００９】以上の構成の本実施例は、スチルビデオカ
メラ用交換レンズ２１をカメラ本体１に使用するため
に、スチルビデオバック２４をカメラ本体１に取り付け
た際に、フォーカルプレーンシャッタ３と固体撮像素子
２５との間に光学的ローパスフイルタを押し込む必要が
なく、スチルビデオカメラ用交換レンズ２１をカメラ本
体１に取り付けることにより、１次ピント面に固体撮像
素子２５を配置することができる。In this embodiment having the above-mentioned structure, since the interchangeable lens 21 for a still video camera is used in the camera body 1, when the still video back 24 is attached to the camera body 1, the focal plane shutter 3 and the solid-state image pickup are performed. It is not necessary to push an optical low-pass filter between the solid-state image pickup element 25 and the element 25, and the solid-state image pickup element 25 can be arranged on the primary focus surface by attaching the interchangeable lens 21 for a still video camera to the camera body 1.
【００１０】[0010]
【発明の効果】本発明は、以上説明したようにスチルビ
デオカメラ用交換レンズのレンズ群内に光学的ローパス
フイルタを内蔵することにより、１次ピント面に固体撮
像素子を取り付けることができるので、従来のように再
結像させるための光学系が不要となり、構造が簡単にな
り、スチルビデオバックも小型化になり、低コストで作
ることが可能となる。また、光学的ローパスフイルタを
交換レンズの有効光束の径が最小の位置に配置すること
により、ローパスフイルタを小さくでき、そのコストを
下げることができる。As described above, according to the present invention, the solid-state image pickup device can be attached to the primary focus surface by incorporating the optical low-pass filter in the lens group of the interchangeable lens for the still video camera. An optical system for re-imaging as in the conventional case is not required, the structure is simplified, the still video bag is downsized, and it can be manufactured at low cost. Further, by arranging the optical low-pass filter at a position where the diameter of the effective light flux of the interchangeable lens is minimum, the low-pass filter can be made small and the cost thereof can be reduced.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明に係る実施例のスチルビデオカメラ用交
換レンズのカメラ本体装着時の概略構成図である。FIG. 1 is a schematic configuration diagram when an interchangeable lens for a still video camera according to an embodiment of the present invention is attached to a camera body.
【図２】従来例のスチルビデオカメラ用交換レンズによ
るカメラ本体装着時の概略構成図である。FIG. 2 is a schematic configuration diagram when a camera body is mounted by an interchangeable lens for a still video camera of a conventional example.
【符号の説明】 １・・カメラ本体、２・・クイックリターンミラー、３
・・シャッタ、２１・・スチルビデオカメラ用交換レン
ズ、２２・・レンズ群、２３・・光学的ローパスフイル
タ、２４・・スチルビデオパック、２５・・固体撮像素
子、２６・・信号処理回路。[Explanation of symbols] 1 ... camera body, 2 ... quick return mirror, 3
..Shutter, 21..Interchangeable lens for still video camera, 22..Lens group, 23..Optical low pass filter, 24..Still video pack, 25..Solid-state image sensor, 26..Signal processing circuit
Claims (2)
て、光学的ローパスフイルタをレンズ群内に内蔵したこ
とを特徴とするスチルビデオカメラ用交換レンズ。1. An interchangeable lens for a still video camera, wherein the interchangeable lens for a still video camera has an optical low-pass filter built in a lens group.
の有効光束の径が最小の位置に配置されていることを特
徴とする請求項１記載のスチルビデオカメラ用交換レン
ズ。2. The interchangeable lens for a still video camera according to claim 1, wherein the optical low-pass filter is arranged at a position where an effective light beam diameter of the interchangeable lens is minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4339541A JPH06167676A (en) | 1992-11-27 | 1992-11-27 | Interchangeable lens for still video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4339541A JPH06167676A (en) | 1992-11-27 | 1992-11-27 | Interchangeable lens for still video camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06167676A true JPH06167676A (en) | 1994-06-14 |
Family
ID=18328453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4339541A Pending JPH06167676A (en) | 1992-11-27 | 1992-11-27 | Interchangeable lens for still video camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06167676A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002885A (en) * | 1996-01-05 | 1999-12-14 | Canon Kabushiki Kaisha | Lens barrel attachable to and detachable from main body of optical apparatus such as camera |
| US6157781A (en) * | 1996-05-30 | 2000-12-05 | Canon Kabushiki Kaisha | Lens barrel, accessory and camera system |
| JP2003043566A (en) * | 2001-07-31 | 2003-02-13 | Nidec Copal Corp | Camera equipped with focal-plane shutter |
| JP2006267863A (en) * | 2005-03-25 | 2006-10-05 | Fujinon Corp | Lens barrel and lens unit |
-
1992
- 1992-11-27 JP JP4339541A patent/JPH06167676A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002885A (en) * | 1996-01-05 | 1999-12-14 | Canon Kabushiki Kaisha | Lens barrel attachable to and detachable from main body of optical apparatus such as camera |
| US6157781A (en) * | 1996-05-30 | 2000-12-05 | Canon Kabushiki Kaisha | Lens barrel, accessory and camera system |
| JP2003043566A (en) * | 2001-07-31 | 2003-02-13 | Nidec Copal Corp | Camera equipped with focal-plane shutter |
| JP2006267863A (en) * | 2005-03-25 | 2006-10-05 | Fujinon Corp | Lens barrel and lens unit |
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