JPH11205642A - Television lens with still photographing function - Google Patents
Television lens with still photographing functionInfo
- Publication number
- JPH11205642A JPH11205642A JP10021445A JP2144598A JPH11205642A JP H11205642 A JPH11205642 A JP H11205642A JP 10021445 A JP10021445 A JP 10021445A JP 2144598 A JP2144598 A JP 2144598A JP H11205642 A JPH11205642 A JP H11205642A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- television
- still image
- reflection mirror
- still
- 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.)
- Granted
Links
Landscapes
- Lenses (AREA)
- Color Television Image Signal Generators (AREA)
- Studio Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スチル撮影機能付
テレビレンズに関し、詳しくは色分解プリズムを搭載し
た放送用テレビカメラ等のカメラ本体に取付可能なスチ
ル撮影機能付テレビ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 a television lens having a still photography function, and more particularly to a television lens having a still photography function which can be attached to a camera body such as a broadcast television camera equipped with a color separation prism.
【０００２】[0002]
【従来の技術】一般に、放送用のテレビカメラ等では、
高画質のカラー画像を得るため、３色分解プリズムと、
分解された各色光による被写体情報を得るための各色光
に対応したＣＣＤをテレビカメラ本体に搭載し、さらに
このテレビカメラ本体の前段に、例えばズームレンズや
マクロレンズ等、用途に応じた各種レンズが取付可能と
なるように構成されている。2. Description of the Related Art Generally, in a television camera for broadcasting or the like,
To obtain a high quality color image, a three-color separation prism,
The CCD camera corresponding to each color light for obtaining subject information by each decomposed color light is mounted on the TV camera main body, and various lenses according to the application, such as a zoom lens and a macro lens, are provided in front of the TV camera main body. It is configured to be attachable.
【０００３】ところで、スポーツのテレビ中継あるいは
結婚披露宴のビデオ撮影を行っている最中に、例えば得
点ゴールの場面やウェディングケーキカットの場面等の
ハイライトシーンを、そのテレビカメラ（ビデオカメラ
も含む；以下同じ）により静止画像として電気的に記録
しておきたいという要望がある。[0003] By the way, during sports TV broadcasts or video shooting of wedding receptions, highlight scenes such as scoring for a goal or cutting a wedding cake are displayed on the television cameras (including video cameras). (Hereinafter the same), there is a demand to electrically record as a still image.
【０００４】このような要望に対し、テレビカメラによ
って電気的に撮像された動画の一駒を静止画像として用
いることも考えられるが、現行のＮＴＳＣ信号との互換
性を優先した場合には、このようにして得られた静止画
像は画質が低下したものとなってしまう。In response to such demands, it is conceivable to use one frame of a moving image electrically picked up by a television camera as a still image. However, if priority is given to compatibility with the current NTSC signal, this frame may be used. The still image obtained in this way has a reduced image quality.
【０００５】[0005]
【発明が解決しようとする課題】したがって、テレビレ
ンズ部もしくはテレビカメラ本体に静止画像専用の撮像
系を取り付け、テレビ画像撮像系とは別の撮像系で静止
画像を得ることによってその画質を良好なものとすると
ともに、テレビレンズ部の一部を静止画像撮像系にも共
通に使用することによって装置全体のコンパクト化、低
廉化を図ることが望ましい。Therefore, an image pickup system dedicated to a still image is attached to a television lens unit or a television camera body, and a still image is obtained by an image pickup system different from the television image pickup system, thereby improving the image quality. In addition, it is desirable to reduce the size and cost of the entire apparatus by using a part of the television lens unit commonly for a still image capturing system.
【０００６】その一方で、テレビ画像撮像系において
は、テレビレンズ部とテレビカメラ本体の両光学系全体
で各収差が良好となるように設計がなされているため、
テレビレンズ部の一部のみを静止画像撮像系に共通に使
用した場合、この静止画像撮像系における収差上の問題
が生じ、これを改善していくことが大きな課題となる。On the other hand, the television image pickup system is designed so that each aberration is good in both the optical system of the television lens unit and the television camera body.
When only a part of the television lens unit is commonly used in the still image capturing system, a problem occurs in the still image capturing system in terms of aberration, and it is a major problem to improve the problem.
【０００７】本発明はこのような問題を解決するために
なされたものであり、テレビレンズに静止画像撮像機能
を付加した場合に、簡易かつコンパクトな構成で、テレ
ビ画像撮像系と静止画像撮像系の両者の光学系を共に収
差が良好に補正されたものとし得るスチル撮影機能付テ
レビレンズを提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. When a still image capturing function is added to a television lens, the TV image capturing system and the still image capturing system can be configured with a simple and compact structure. It is an object of the present invention to provide a television lens with a still photographing function in which both of the optical systems can be properly corrected for aberration.
【０００８】[0008]
【課題を解決するための手段】本発明のスチル撮影機能
付テレビレンズは、被写体像情報を担持した光束を色分
解する色分解プリズムを搭載してなるテレビカメラ本体
の前段に取り付けられる複数のレンズ群を有してなるテ
レビレンズにおいて、前記複数のレンズ群の所定のレン
ズ間位置に配された、前記被写体像情報を担持した光束
を前記テレビカメラ本体とは異なる方向に導く反射ミラ
ーと、該反射ミラーにより前記テレビカメラ本体とは異
なる方向に導かれた光束を照射され、前記被写体像の静
止画像を撮像するスチル画像用撮像素子とを備え、前記
反射ミラーと該スチル画像用撮像素子との間に、前記複
数のレンズ群のうち前記反射ミラーの後段に位置するレ
ンズ部と同一形状、同一材質で形成されたスチル画像用
レンズ部と、前記スチル画像用撮像素子に入射する光束
に対し、前記色分解プリズムに入射した光束の該プリズ
ム内における光路長と略等価な光路長を与える光学ブロ
ックとを配設してなることを特徴とするものである。According to the present invention, there is provided a television lens having a still photographing function, comprising a plurality of lenses mounted in front of a television camera body having a color separation prism mounted thereon for color separation of a light beam carrying object image information. In a television lens having a group, a reflection mirror arranged at a predetermined inter-lens position of the plurality of lens groups and guiding a light beam carrying the subject image information in a direction different from that of the television camera body; A light flux guided in a direction different from that of the television camera body by the reflection mirror is applied, and a still image pickup device for capturing a still image of the subject image is provided. The reflection mirror and the still image pickup device And a still image lens portion formed of the same shape and the same material as a lens portion of the plurality of lens groups located at a subsequent stage of the reflection mirror; An optical block for providing a light beam incident on the chill image imaging device with an optical path length substantially equivalent to an optical path length in the prism of the light beam incident on the color separation prism is provided. It is.
【０００９】また、前記反射ミラーはハーフミラーであ
っても全反射ミラーであってもよいが、全反射ミラーと
した場合は、前記光束をテレビカメラ本体にそのまま入
射せしめる第１のミラー位置と前記光束を前記スチル画
像用撮像素子に導く第２のミラー位置との２位置の間を
移動可能とされていることが好ましい。さらに、前記光
学ブロックは、前記反射ミラーによる像の反射を元に戻
す機能を有する光学プリズムとすることが好ましい。The reflection mirror may be a half mirror or a total reflection mirror. In the case of a total reflection mirror, the first mirror position for allowing the light beam to enter the television camera body as it is, and It is preferable that the light beam can be moved between two positions including a second mirror position for guiding the light flux to the still image pickup device. Further, it is preferable that the optical block is an optical prism having a function of restoring the reflection of an image by the reflection mirror.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を用いて説明する。図１は、本発明のスチル撮影機能付
テレビレンズを示す概略図である。すなわち、このスチ
ル撮影機能付テレビレンズは、色分解プリズム１１を搭
載したテレビカメラ本体１の被写体側に取り付けられ
る、ズームレンズ群２１を有するテレビレンズ系２と、
ズームレンズ群２１の群間中に配されたハーフミラー３
１によって分離された光束を取り込んで静止画像（以下
スチル画像と称する）を撮像するためのスチル画像撮像
系３を備えている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a television lens with a still photography function according to the present invention. That is, the television lens with a still photography function includes a television lens system 2 having a zoom lens group 21 attached to a subject side of a television camera body 1 equipped with a color separation prism 11;
Half mirror 3 arranged between zoom lens groups 21
A still image capturing system 3 for capturing a still image (hereinafter, referred to as a still image) by taking in the light flux separated by 1 is provided.
【００１１】次に図２を用いて、上述した各部を詳細に
説明する。まず、テレビカメラ本体１は、テレビレンズ
系２を通過した、被写体像情報を担持した光束を３原色
光に分解する色分解プリズム１１と、この色分解プリズ
ム１１により分解されたＢ，Ｒ，Ｇの各原色光が結像さ
れる、各々の原色光に対応するＣＣＤからなる撮像素子
１２、１３、１４を備えている。Next, each of the above-mentioned parts will be described in detail with reference to FIG. First, the television camera body 1 includes a color separation prism 11 that separates a light beam carrying object image information that has passed through the television lens system 2 into three primary color lights, and B, R, and G separated by the color separation prism 11. Image pickup elements 12, 13 and 14 each of which is formed by a CCD corresponding to each primary color light, on which each primary color light is imaged.
【００１２】上記色分解プリズム１１は、３つのプリズ
ム１１Ａ、１１Ｂ、１１Ｃを組み合わせてなる。すなわ
ち、テレビレンズ系２の光軸に沿ってテレビレンズ系２
側から順に第１プリズム１１Ａ、第２プリズム１１Ｂお
よび第３プリズム１１Ｃが配列され、第１プリズム１１
Ａと第２プリズム１１Ｂはエアギャップを介して対向す
るように構成され、第１プリズム１１Ａの第２プリズム
対向面には青色光のみを反射する第１のダイクロイック
層が形成され、さらに第２プリズム１１Ｂと第３プリズ
ム１１Ｃとは赤色光のみを反射する第２のダイクロイッ
ク層を介して接合されている。これにより、第１プリズ
ム１１Ａに入射した光束はこの色分解プリズム１１で
Ｂ，Ｒ、Ｇ３原色光に分解され、さらにプリズム１１
Ａ、１１Ｂ、１１Ｃの射出面には、Ｂ，Ｒ，Ｇの分光特
性を整えるトリミングフィルタ１１Ａ′、１１Ｂ′、１
１Ｃ′が接合されており、各色光に対応する撮像素子１
２、１３、１４上に照射され、これらの撮像素子１２、
１３、１４上に各色光の被写体像が結像される。The color separation prism 11 is formed by combining three prisms 11A, 11B and 11C. That is, along the optical axis of the TV lens system 2, the TV lens system 2
The first prism 11A, the second prism 11B, and the third prism 11C are arranged in this order from the side.
A and the second prism 11B are configured to face each other with an air gap therebetween, and a first dichroic layer that reflects only blue light is formed on a surface of the first prism 11A facing the second prism. 11B and the third prism 11C are joined via a second dichroic layer that reflects only red light. Thereby, the light beam incident on the first prism 11A is separated into B, R and G primary color lights by the color separation prism 11, and
The output surfaces of A, 11B and 11C have trimming filters 11A ', 11B' and 1 for adjusting the spectral characteristics of B, R and G, respectively.
1C 'is joined to the image pickup device 1 corresponding to each color light.
2, 13, 14, and these imaging elements 12,
Subject images of the respective color lights are formed on 13 and 14.
【００１３】また、第１プリズム１１Ａの光入射端面に
近接させて、ローパスフィルタおよび／または赤外線カ
ットフィルタ等のフィルタ部材１５が配設されている。
なお、このようにして各色光の被写体像が結像された撮
像素子１２、１３、１４では、各色光が担持した被写体
像情報を所定のサンプリング周期で光電的に変換し、こ
の後各色用電気信号は合成されて、被写体のカラーテレ
ビ画像が形成されることとなる。In addition, a filter member 15 such as a low-pass filter and / or an infrared cut filter is provided near the light incident end face of the first prism 11A.
In this way, in the imaging devices 12, 13, and 14 on which the subject images of the respective color lights are formed, the subject image information carried by the respective color lights is photoelectrically converted at a predetermined sampling cycle, and thereafter, the electrical signals for the respective colors are converted. The signals are combined to form a color television image of the subject.
【００１４】一方、テレビレンズ系２は、５群からなる
ズームレンズ群２１を備えている。このズームレンズ群
２１は物体側より順に、４枚のレンズからなるフォーカ
ス機能を有する正の第１群と、変倍機能を有する、３枚
のレンズからなる負の第２群と、この変倍に伴なう焦点
位置の変動を補正する２枚のレンズからなる負の第３群
と、４枚のレンズを有する正のリレーレンズ前群からな
る第４群と、６枚のレンズを有する正のリレーレンズ後
群からなる第５群を配設してなり、変倍時において第２
群と第３群のレンズ群間隔を変化させながら両レンズ群
を光軸Ｘに沿って移動せしめることにより全系の焦点距
離ｆを変化させるとともに、光束を結像位置に効率良く
集束させるようにしたものである。On the other hand, the television lens system 2 includes a zoom lens group 21 composed of five groups. The zoom lens group 21 includes, in order from the object side, a first positive lens group having a focusing function including four lenses, a second negative lens group including three lenses having a zooming function, and a zoom lens. A negative third group consisting of two lenses that corrects the fluctuation of the focal position caused by the above, a fourth group consisting of a front group of positive relay lenses having four lenses, and a positive group having six lenses A fifth lens group consisting of a rear lens group of
The focal length f of the entire system is changed by moving both lens groups along the optical axis X while changing the distance between the lens groups of the third group and the third group so that the light flux is efficiently focused on the image forming position. It was done.
【００１５】また、このズームレンズ群２１は第３群と
第４群の間にシャッタ（絞り）２２を配置している。な
お、第４群と第５群は間隔を大きくあけるように配され
ており、本来ズームレンズ群２１の焦点距離を望遠側へ
シフトさせる焦点距離変換レンズ群（ＥＸＴ群）が挿入
可能なスペースとされている。The zoom lens group 21 has a shutter (aperture) 22 disposed between the third and fourth groups. The fourth group and the fifth group are arranged so as to have a large space therebetween, and a space in which a focal length conversion lens group (EXT group) that originally shifts the focal length of the zoom lens group 21 to the telephoto side can be inserted. Have been.
【００１６】本実施形態のものでは、この第４群と第５
群の間のスペースにハーフミラー３１を配設し、テレビ
レンズ系２に入射した光束を２系に分割するようにして
いる。２系に分割された光束の一方はテレビカメラ本体
１に入射し、該分割された光束の他方は上述したスチル
画像撮像系３に導かれる。このスチル画像撮像系３は、
スチル撮像用レンズ群３２と、ハーフミラー３１で反射
した被写体像を再び反射して像姿勢を元に戻す直角プリ
ズム３３と、ローパスフィルタおよび／または赤外線カ
ットフィルタ等のフィルタ部材３４と、スチル画像撮像
用のＣＣＤからなる撮像素子３５を備えている。In this embodiment, the fourth lens group and the fifth lens group
A half mirror 31 is provided in a space between the groups so that a light beam incident on the television lens system 2 is split into two systems. One of the two split light beams enters the television camera body 1, and the other of the split light beams is guided to the above-described still image capturing system 3. This still image imaging system 3
A still imaging lens group 32, a right-angle prism 33 that reflects the subject image reflected by the half mirror 31 again to restore the image orientation, a filter member 34 such as a low-pass filter and / or an infrared cut filter, and a still image capture And an image pickup device 35 composed of a CCD for use.
【００１７】ところで、テレビレンズ系２のズームレン
ズ群２１と、テレビカメラ本体１中の色分解プリズム１
１等の光学系とは両光学系全体として収差が少なくなる
ように設計されており、撮像素子１２、１３、１４上に
結像される像質が良好となるように構成されている。し
たがって、ハーフミラー３１で光束を分割してスチル画
像撮像系３に取り込んだ場合には、そのままでは収差が
不良となり、撮像素子３５上に結像される像質を良好と
することが困難となる。The zoom lens group 21 of the television lens system 2 and the color separation prism 1 in the television camera body 1
The first and second optical systems are designed so that aberrations are reduced as a whole in both optical systems, and are configured so that image quality formed on the imaging elements 12, 13, and 14 is good. Therefore, when the light beam is split by the half mirror 31 and taken into the still image imaging system 3, the aberration becomes poor as it is, and it becomes difficult to improve the image quality formed on the image sensor 35. .
【００１８】そこで、本実施形態のものでは、スチル画
像撮像系３において、ハーフミラー３１の後段に、第５
群と全く同一構成（同一のレンズ枚数、レンズ形状、お
よびレンズ材質）のスチル撮像用レンズ群３２を配設
し、さらにその後段に、光束が色分解プリズム１１を通
過する場合に、この色分解プリズム１１内における光路
長と略同一の光路長を光束に与える直角プリズム３３を
配設して、スチル画像撮像系３によってスチル画像を撮
像する場合にも、テレビ画像撮像系によってテレビ画像
を撮像する場合と同様に収差を良好に補正し、高画質な
再生画像を得ることができるようにしている。Therefore, in the present embodiment, in the still image capturing system 3, the fifth mirror is provided after the half mirror 31.
A still imaging lens group 32 having exactly the same configuration (same number of lenses, lens shape, and lens material) as the group is provided. Further, when a light beam passes through the color separation prism 11, Even when a still image is captured by the still image capturing system 3, a television image is captured by the TV image capturing system by arranging the right-angle prism 33 that gives the light beam an optical path length substantially equal to the optical path length in the prism 11. As in the case described above, the aberration is satisfactorily corrected, and a high-quality reproduced image can be obtained.
【００１９】すなわち、テレビ画像撮像系の光学系を構
成する第１群、第２群、第３群、第４群、第５群および
色分解プリズム１１と、スチル画像撮像系を構成する第
１群、第２群、第３群、第４群、スチル撮像用レンズ群
３２および直角プリズム３３は光学的な特性上等価とな
り、テレビ画像撮像系の撮像素子１２、１３、１４とス
チル画像撮像系３の撮像素子３５上での像の収差も同様
となる。なお、テレビ画像撮像系３のフィルタ部材１５
とスチル画像撮像系３のフィルタ部材３４の光学的な特
性を等しくするように設計すれば、上記両系の収差を厳
密に一致させることができる。That is, the first group, the second group, the third group, the fourth group, the fifth group and the color separation prism 11 constituting the optical system of the television image pickup system, and the first group constituting the still image pickup system. The group, the second group, the third group, the fourth group, the still imaging lens group 32, and the right-angle prism 33 are equivalent in optical characteristics, and are equivalent to the imaging elements 12, 13, 14 of the television imaging system and the still imaging system. The same applies to the aberration of the image on the third image sensor 35. The filter member 15 of the television image pickup system 3
If the optical characteristics of the filter member 34 of the still image capturing system 3 are designed to be equal to each other, the aberrations of the two systems can be exactly matched.
【００２０】また、上述したようにズームレンズ群２１
の第５群とスチル撮像用レンズ群３２はレンズ枚数、レ
ンズ形状およびレンズ材質が全く同一となるように構成
されているから、そのレンズの製造工程を共通化するこ
とができ、製造工程の削減および製造コストの低減を図
ることができる。Also, as described above, the zoom lens group 21
Since the fifth lens group and the still imaging lens group 32 are configured so that the number of lenses, the lens shape, and the lens material are completely the same, the manufacturing process of the lens can be shared, and the manufacturing process can be reduced. In addition, the manufacturing cost can be reduced.
【００２１】また、スチル画像撮像系３において反射プ
リズム３３で光束を反射させることにより、ハーフミラ
ー３１において反射した像の上下を再度反転させること
ができ、テレビ画像撮像系の撮像素子１２、１３、１４
上での像姿勢と、スチル画像撮像系３の撮像素子３５上
での像姿勢を一致させることが可能となる。なお、本発
明のスチル撮影機能付テレビレンズとしては上述した実
施形態のものに限られるものではなく、その他の種々の
態様の変更が可能であり、例えば、直角プリズム３３と
フィルタ部材３４の配設位置を互いに入れ替えることが
可能である。Further, by reflecting the light beam by the reflecting prism 33 in the still image pickup system 3, the image reflected by the half mirror 31 can be inverted upside down again. 14
It is possible to make the above image orientation coincide with the image orientation on the image sensor 35 of the still image imaging system 3. The television lens with a still photographing function of the present invention is not limited to the above-described embodiment, and various other modifications can be made. For example, the arrangement of the right-angle prism 33 and the filter member 34 is possible. The positions can be interchanged with each other.
【００２２】また、テレビレンズ系２を構成するレンズ
群はズームレンズ群に限られず、固定焦点タイプのもの
であってもよく、また、その機能やレンズ構成も限定さ
れるものでなく、スチル画像撮像系３に光束を取り込む
ための反射ミラーを挿入するスペースがあればよい。ま
た、反射ミラーが挿入される、レンズ群の群間スペース
位置も限定されるものではない。The lens group constituting the television lens system 2 is not limited to the zoom lens group, but may be of a fixed focus type, and its function and lens configuration are not limited. It is sufficient that the imaging system 3 has a space for inserting a reflection mirror for taking in a light beam. Further, the position of the space between the lens groups where the reflection mirror is inserted is not limited.
【００２３】さらに、この反射ミラーは上述した平板状
のハーフミラーに限られるものではなく、ガラスブロッ
ク状のハーフプリズムとしてもよく、また、ハーフミラ
ーに代えて全反射ミラーとしてもよい。反射ミラーを全
反射ミラーとした場合には、図３に示すように、この全
反射ミラー１３１が光路上位置１３１Ａと光路外位置１
３１Ｂとの２位置の間を移動可能となるように構成する
ことが必要である。これにより、全反射ミラー１３１が
光路上位置１３１Ａに配されているときは全光束がスチ
ル画像撮像系３に導かれ、全反射ミラー１３１が光路外
位置１３１Ｂに配されているときは全光束がテレビ画像
撮像系に導かれることとなる。Further, the reflection mirror is not limited to the above-described flat half mirror, but may be a glass block half prism or a total reflection mirror instead of the half mirror. When the reflection mirror is a total reflection mirror, as shown in FIG. 3, the total reflection mirror 131 is located at the position 131A on the optical path and the position 1 outside the optical path.
It is necessary to be configured to be able to move between the two positions with 31B. Thus, when the total reflection mirror 131 is disposed at the position 131A on the optical path, the total light flux is guided to the still image imaging system 3, and when the total reflection mirror 131 is disposed at the position 131B outside the optical path, the total light flux is transmitted. It will be led to the television image capturing system.
【００２４】この場合の移動は、例えば、図３に示すよ
うに、全反射ミラー１３１の一端を回動中心として、該
全反射ミラー１３１を矢印Ａ方向に所定角度だけ回動さ
せるようにしてもよく、この全反射ミラー１３１を上述
した実施形態におけるＥＸＴ群挿入スペースに挿入した
場合には、この全反射ミラー１３１の光路外位置１３１
Ｂへの移動操作と、ＥＸＴ群の該スペースへの挿入操作
を連動させるようにしてもよい。In this case, for example, as shown in FIG. 3, the total reflection mirror 131 may be rotated by a predetermined angle in the direction of arrow A with one end of the total reflection mirror 131 as the center of rotation. When the total reflection mirror 131 is inserted into the EXT group insertion space in the above-described embodiment, the position 131 outside the optical path of the total reflection mirror 131 is often used.
The operation of moving to B and the operation of inserting the EXT group into the space may be linked.
【００２５】また、上述した直角プリズム３３は光束を
反射させて、像姿勢の上下を反転させる機能を有してい
るが、テレビレンズ系２中の反射ミラー３１、１３１で
反転された像姿勢で撮像素子３５上に結像させたい場合
や、撮像素子３５により取り込まれた像情報を電気的に
反転させるような場合には、直角プリズム３３に代え
て、図４に示すような、該直角プリズム３３と通過光束
の光路長が等しくなるガラスブロック１３３を配設し、
光束が直進してこのガラスブロック１３３を通過するよ
うにしてもよい。The above-mentioned right angle prism 33 has a function of reflecting a light beam and inverting the image attitude up and down. However, the right angle prism 33 has an image attitude inverted by the reflection mirrors 31 and 131 in the television lens system 2. When it is desired to form an image on the image sensor 35 or when the image information captured by the image sensor 35 is electrically inverted, the right-angle prism as shown in FIG. A glass block 133 in which the optical path length of the passing light flux is equal to 33 is provided.
The light beam may travel straight and pass through the glass block 133.
【００２６】[0026]
【発明の効果】以上に説明したように、本発明のスチル
撮影機能付テレビレンズによれば、テレビカメラ本体に
取り付けるテレビレンズのレンズ間スペースに反射ミラ
ーを挿入し、この反射ミラーによって偏向された光束を
スチル画像用撮像素子に入射させるようにしているの
で、一つのテレビカメラ装置でテレビ画像もスチル画像
も撮影することができ便利である。また、テレビ画像撮
像系とスチル画像撮像系のレンズ部の一部を共通化する
ことで装置全体のコンパクト化、低廉化を図るととも
に、スチル画像撮像系の撮像素子をテレビ画像撮像系の
撮像素子とは別個に設けることで静止画像の画質を良好
なものとすることができる。As described above, according to the television lens with the still photographing function of the present invention, the reflection mirror is inserted into the space between the lenses of the television lens attached to the television camera body, and the reflection mirror is deflected by this reflection mirror. Since the light beam is made to enter the still image pickup device, it is convenient that one television camera device can capture both a television image and a still image. In addition, by using a part of the lens unit of the TV image capturing system and the still image capturing system in common, the overall device can be made compact and inexpensive, and the still image capturing system can be replaced with the TV image capturing device. The quality of a still image can be improved by providing the image separately.
【００２７】さらに、上記両系において共通化されてい
ない、テレビ画像撮像系の、反射ミラーの後段に配され
ているレンズ部分と同一構成のレンズ部分をスチル画像
撮像系中に設け、かつ、カメラ本体内に配されている、
テレビ画像撮像系の色分解プリズムと略等しい光路長を
通過光束に与える光学ブロックをスチル画像撮像系中に
設けているため、スチル画像撮像系の光学特性をテレビ
画像撮像系と略同等なものとすることができ、両系の収
差を共に良好なものとすることが可能である。Further, a lens part having the same configuration as a lens part disposed downstream of the reflection mirror of the television image pickup system, which is not shared between the two systems, is provided in the still image pickup system, and Arranged in the body,
Since an optical block for providing a passing light beam with an optical path length substantially equal to the color separation prism of the television image capturing system is provided in the still image capturing system, the optical characteristics of the still image capturing system are substantially equivalent to those of the TV image capturing system. It is possible to make the aberrations of both systems favorable.
【図１】本発明の一実施形態に係るスチル撮影機能付テ
レビレンズを示す概略図FIG. 1 is a schematic view showing a television lens with a still photography function according to an embodiment of the present invention.
【図２】図１に示すテレビレンズをより詳細に示す概略
図FIG. 2 is a schematic diagram showing the television lens shown in FIG. 1 in more detail;
【図３】図１に示すテレビレンズの一部を変更した態様
を示す概略図FIG. 3 is a schematic diagram showing an aspect in which a part of the television lens shown in FIG. 1 is modified.
【図４】図１に示すテレビレンズの一部を変更した態様
を示す概略図FIG. 4 is a schematic view showing an aspect in which a part of the television lens shown in FIG. 1 is modified;
１ テレビカメラ本体 ２ テレビレンズ系 ３ スチル画像撮像系 １１ 色分解プリズム １１Ａ、１１Ｂ、１１Ｃ プリズム １２、１３、１４ 撮像素子 ２１ ズームレンズ群 ２２ シャッタ（絞り） ３１ ハーフミラー ３２ スチル撮像用レンズ群 ３３ 直角プリズム １３１ 全反射ミラー １３３ ガラスブロック DESCRIPTION OF SYMBOLS 1 TV camera main body 2 TV lens system 3 Still image imaging system 11 Color separation prism 11A, 11B, 11C Prism 12, 13, 14 Image sensor 21 Zoom lens group 22 Shutter (aperture) 31 Half mirror 32 Still imaging lens group 33 Right angle Prism 131 Total reflection mirror 133 Glass block
Claims (4)
色分解プリズムを搭載してなるテレビカメラ本体の前段
に取り付けられる複数のレンズ群を有してなるテレビレ
ンズにおいて、 前記複数のレンズ群の所定のレンズ間位置に配された、
前記被写体像情報を担持した光束を前記テレビカメラ本
体とは異なる方向に導く反射ミラーと、該反射ミラーに
より前記テレビカメラ本体とは異なる方向に導かれた光
束を照射され、前記被写体像の静止画像を撮像するスチ
ル画像用撮像素子とを備え、 前記反射ミラーと該スチル画像用撮像素子との間に、前
記複数のレンズ群のうち前記反射ミラーの後段に位置す
るレンズ部と同一形状、同一材質で形成されたスチル画
像用レンズ部と、前記スチル画像用撮像素子に入射する
光束に対し、前記色分解プリズムに入射した光束の該プ
リズム内における光路長と略等価な光路長を与える光学
ブロックとを配設してなることを特徴とするスチル撮影
機能付テレビレンズ。1. A television lens comprising a plurality of lens groups attached to a front stage of a television camera body equipped with a color separation prism for color-separating a light beam carrying object image information, wherein said plurality of lens groups Disposed at a predetermined distance between the lenses,
A reflecting mirror for guiding the light beam carrying the subject image information in a direction different from the television camera body, and a light beam guided in a direction different from the television camera body by the reflecting mirror to irradiate the still image of the subject image A still image pickup device for picking up an image, between the reflection mirror and the still image pickup device, the same shape and the same material as a lens portion of the plurality of lens groups that is located at a subsequent stage of the reflection mirror. A still image lens unit formed by the above, and an optical block that gives an optical path length substantially equivalent to an optical path length in the prism for the light beam incident on the color separation prism for the light beam incident on the still image imaging device. A television lens with a still photography function, characterized by being provided with.
とを特徴とする請求項１記載のスチル撮影機能付テレビ
レンズ。2. The television lens with a still photographing function according to claim 1, wherein the reflection mirror is a half mirror.
て、前記光束をテレビカメラ本体にそのまま入射せしめ
る第１のミラー位置と前記光束を前記スチル画像用撮像
素子に導く第２のミラー位置との２位置の間を移動可能
とされていることを特徴とする請求項１記載のスチル撮
影機能付テレビレンズ。3. A reflection mirror according to claim 1, wherein the reflection mirror is a total reflection mirror, and a first mirror position for causing the light beam to enter the television camera body as it is and a second mirror position for guiding the light beam to the still image pickup device. 2. The television lens with a still photography function according to claim 1, wherein the television lens is movable between two positions.
よる像姿勢の反転を元に戻す機能を有する光学プリズム
であることを特徴とする請求項１〜３のうちいずれか１
項記載のスチル撮影機能付テレビレンズ。4. The optical prism according to claim 1, wherein the optical block is an optical prism having a function of restoring the inversion of the image orientation by the reflection mirror.
TV lens with still photography function described in the item.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02144598A JP3900651B2 (en) | 1998-01-19 | 1998-01-19 | TV lens with still shooting function |
| US09/231,781 US6185044B1 (en) | 1998-01-19 | 1999-01-15 | TV lens with still-taking function |
| EP99100882A EP0930779B1 (en) | 1998-01-19 | 1999-01-19 | TV lens with still picture taking function |
| EP07017499A EP1858250B1 (en) | 1998-01-19 | 1999-01-19 | TV lens with still picture taking function |
| EP07017498A EP1858249B1 (en) | 1998-01-19 | 1999-01-19 | TV lens with still picture taking function |
| DE69941747T DE69941747D1 (en) | 1998-01-19 | 1999-01-19 | TV lens with still picture recording function |
| EP07017497A EP1858248B1 (en) | 1998-01-19 | 1999-01-19 | TV lens with still picture taking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02144598A JP3900651B2 (en) | 1998-01-19 | 1998-01-19 | TV lens with still shooting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11205642A true JPH11205642A (en) | 1999-07-30 |
| JP3900651B2 JP3900651B2 (en) | 2007-04-04 |
Family
ID=12055172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02144598A Expired - Fee Related JP3900651B2 (en) | 1998-01-19 | 1998-01-19 | TV lens with still shooting function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3900651B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035190A (en) * | 2014-06-05 | 2014-09-10 | 西安工业大学 | Integrated multi-waveband common-path synchronous continuous variable-focus optical system |
-
1998
- 1998-01-19 JP JP02144598A patent/JP3900651B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035190A (en) * | 2014-06-05 | 2014-09-10 | 西安工业大学 | Integrated multi-waveband common-path synchronous continuous variable-focus optical system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3900651B2 (en) | 2007-04-04 |
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