JP3785991B2 - Lens device and lens operation unit - Google Patents

Description

により、正しい差分を求める。
【００５３】
また、前回のFCtrl2が３５で、今回のFCtrl2が１６２８２の場合、その差分は、１６２４７となる。この場合には、マイナス側にオーバーフローしたと判断し、次式、
【００５４】
【数２】

により、正しい差分を求める。
【００５５】
次に、フォーカスモジュール３０に出力された前回の位置指令データFSig2 と、ステップＳ５３で求めた差分RefFCtrlとを加算し、この加算値を今回の位置指令データFSig2 とする（ステップＳ５４）。尚、電源投入１回目の処理の場合には、前回の位置指令データFSig2 がないため、ステップＳ４４で求めたレンズ初期値FSig2 が使用される。また、電源投入１回目又はデマンドユニット接続１回目の場合には、RefFCtrlが０であるため、位置指令データFSig2 は変化せず、これによりデマンドユニット２８を操作しない限り、フォーカスレンズは移動しない。
【００５６】
続いて、ステップＳ４０で読み込んだ制御データFCtrl2を、次回の差分RefFCtrlの演算用にMemoFCtrl として一時保持する（ステップＳ５５）。
【００５７】
次に、ステップＳ５４で求めた今回の位置指令データFSig2 が、位置指令データFSig2 の最小値（０）から位置指令データFSig2 の最大値（１６３８３）の範囲を越えないように制限する（ステップＳ５６）。即ち、ステップＳ５４で求めた今回の位置指令データFSig2 が０以下になる場合には、０に制限し、１６３８３以上になる場合には１６３８３に制限する。
【００５８】
上記ステップＳ４０〜ステップＳ５６のエンドレス処理（図３のステップＳ２２）を、所定の周期で繰り返し行うことにより、フォーカスノブの操作に応じた時々刻々の位置指令データFSig2 が生成される。
【００５９】
このようにして生成された位置指令データFSig2 は、フォーカスモジュール３０に出力される（図３のステップＳ２４）。
【００６０】
図６は図５に示したエンドレス処理の変形例を示すフローチャートである。尚、図５に示した処理と同じ処理を行うステップには、同じステップ番号を付し、その詳細な説明は省略する。
【００６１】
図６に示すエンドレス処理は、図５に示したエンドレス処理と比べて電源投入１回目のレンズ初期値の設定方法のみが異なる。即ち、図５に示したエンドレス処理では、電源投入１回目のレンズ初期値を、レンズ位置データから逆算した位置指令データFSig2 としたが（ステップＳ４４）、図６に示すエンドレス処理は、フォーカスモジュール３０に出力された位置指令データFSig2 を不揮発性のメモリ５３（図２参照）に記憶させておき（ステップＳ５８）、電源投入１回目のレンズ初期値は、メモリ５３から読み出した位置指令データFSig2 としている（ステップＳ５７）。
【００６２】
尚、図６に示すフローチャートでは、位置指令データFSig2 を毎回メモリ５３に記憶させているが、これに限らず、電源切断時のみ電源切断に先立ってフォーカスモジュール３０に出力されていた位置指令データFSig2 を記憶させるようにしてもよい。これによれば、レンズ装置１２の電源をＯＮ／ＯＦＦしてもデマンドユニット２８を操作しない限り、フォーカスレンズは移動しない。
【００６３】
上記構成のレンズ装置１２は、エンドレス未対応の通常のデマンドユニット及びエンドレス対応のデマンドユニットのいずれのデマンドユニットでも使用することができる。
［デマンドユニットが主体となってエンドレス処理及びスタンダード処理を行う場合］
次に、デマンドユニット２８が主体となってエンドレス処理、及びエンドレス未対応の処理（スタンダード処理）を行う場合について説明する。
【００６４】
図７のフローチャートに示すようにデマンドユニット２８のデマンドＣＰＵ４４（図２参照）は、まず、デマンド信号を読み込む（ステップＳ６０）。このデマンド信号は、カウンタ４２から読み込まれる１４ビットの制御データFCtrl1の他に、スイッチ情報部４３からの各種のスイッチ信号を含む。
【００６５】
次に、通信インターフェース４５に接続されたレンズ装置が、デジタルレンズ装置かアナログレンズ装置かを判別する（ステップＳ６２）。尚、この判別は、通信インターフェース４５の１本のラインの電圧に基づいて行うことができる。また、レンズ装置の種類を選択する切替スイッチをデマンドユニット２８に設け、この切替スイッチの切替信号に基づいてレンズ装置を判別するようにしてもよい。
【００６６】
アナログレンズ装置に接続されていると判別すると、スタンダード処理を行う（ステップＳ６４）。
【００６７】
このスタンダード処理は、図８に示すようにレンズ装置１２への電源投入後の１回目の処理か否かを判別する（ステップＳ８０）。電源投入後の１回目の処理の場合には、デマンドＣＰＵ４４は、レンズ装置側に設けられたフォーカス位置センサからレンズ位置データを読み取り、このレンズ位置データから位置指令データFSig1 を逆算し、これをレンズ初期値FSig1 とする（ステップＳ８１）。また、図７のステップＳ６０で読み込んだ制御データFCtrl1をMemoFCtrl として一時保持する（ステップＳ８２）。尚、ステップＳ８１において、レンズ位置データから算出した位置指令データFSig1 の代わりに、図６のステップＳ５７で説明したように電源切断前にフォーカスモジュール３０に出力されていた位置指令データをメモリから読み出し、これをレンズ初期値FSig1 としてもよい。
【００６８】
一方、電源投入後の２回目以降の処理の場合には、上記ステップＳ８１及びステップＳ８２の処理を経由せずにステップＳ８３に移行する。
【００６９】
その後、ステップＳ８３〜ステップＳ８６の処理を順次行うが、これらのステップＳ８３〜ステップＳ８６における処理は、図５で説明したステップＳ５３〜ステップＳ５６の処理と同様なため、その詳細な説明は省略する。
【００７０】
上記スタンダード処理によって生成された位置指令データFSig1 は、図示しないＤ／Ａ変換器で電圧信号に変換されたのち（図７のステップＳ６６）、アナログレンズ装置に出力される。
【００７１】
図７に戻って、ステップＳ６２でデジタルレンズ装置に接続されていると判別されると、その接続されているデジタルレンズ装置からレンズ情報を読み込む（ステップＳ６８）。このレンズ情報は、エンドレス対応のデジタルレンズ装置かエンドレス未対応のデジタルレンズ装置かを示す情報である。
【００７２】
尚、このデマンドユニット２８がレンズ装置１２に接続された場合に、該レンズ装置１２から送信されるエンドレス許可情報（図５のステップＳ５２参照）は、エンドレス対応のデジタルレンズ装置であることを示すレンズ情報である。また、前記レンズ情報は、前述したようにレンズ装置の種類を選択する切替スイッチからの情報（切替信号）であってもよい。
【００７３】
また、エンドレス対応のデジタルレンズ装置とは、例えば図２に示したカウンタ４２からの制御データFCtrl1をそのまま入力した場合に対応できるレンズ装置であり、エンドレス未対応のデジタルレンズ装置とは、例えば図８に示したスタンダード処理された位置指令データFSig1 を入力した場合に対応できるレンズ装置である。
【００７４】
上記レンズ情報によりエンドレス対応のデジタルレンズ装置かエンドレス未対応のデジタルレンズ装置かを判別する（ステップＳ７０）。エンドレス未対応のデジタルレンズ装置の場合には、ステップＳ７２に進む。このステップＳ７２では、図８で説明したスタンダード処理を行い、このスタンダード処理によって生成した位置指令データFSig1 を、エンドレス未対応のデジタルレンズ装置に出力する。
【００７５】
一方、ステップＳ７０でエンドレス対応のデジタルデマンドユニット（例えば、図１及び図２に示したレンズ装置１２）であることが判別されると、図９に示すエンドレス処理を行う（ステップＳ７４）。
【００７６】
このエンドレス処理は、図９に示すように１４ビットのカウンタ４２（図２参照）の計数値である０〜１６３８３の範囲の制御データFCtrl1を読み込み、この制御データFCtrl1をそのまま制御データFSig1 に置き換えて出力する処理である（ステップＳ９０）。尚、フォーカスノブ２８Ａがプラス方向（無限遠側）に操作され、カウンタ４２の計数値がオーバーフローすると（１６３８３を越えると）、計数値は０に戻り、フォーカスノブ２８Ａがマイナス方向（至近側）に操作され、カウンタ４２の計数値がオーバーフローすると（０を越えると）、計数値は１６３８３に戻る。
【００７７】
そして、エンドレス対応のデジタルデマンドユニットに対しては、上記エンドレス処理した制御データFSig1 を出力する。
【００７８】
上記構成のデマンドユニット２８は、エンドレス未対応の通常のレンズ装置及びエンドレス対応のレンズ装置のいずれのレンズ装置でも使用することができる。
【００７９】
図１０は本発明に係るレンズ装置に本発明に係るレンズ操作ユニットが接続された放送用テレビカメラシステム全体の他の構成を示した斜視図である。尚、図１０において、図１と共通する部分には同一の符号を付し、その詳細な説明は省略する。
【００８０】
図１０に示す放送用テレビカメラシステム全体の構成は、図１に示したものと比較して、操作棒１６が取り付けられている点で相違する。
【００８１】
この操作棒１６は、カメラ本体１４に形成された操作棒挿通孔１４Ａ（図１参照）を貫通してカメラ本体１４の背面側に突出される。カメラマンは、カメラ本体１４のビューファインダ２０に映る映像を見ながら、この操作棒１６の指掛部１８を把持して操作棒１６を押し引き操作することでズーム操作を行うことができ、また、指掛部１８を回転操作し、操作棒１６の軸を回転させることでフォーカス操作を行うことができる。
【００８２】
操作棒１６、ズームレートデマンドユニット２６、及びデマンドユニット２８のいずれを使用してフォーカス操作及びズーム操作を行うかは、撮影状況やカメラマンの好みで選択できるようになっている。
【００８３】
図１１は上記レンズ装置１２、デマンドユニット２８及びレンズ装置に取り付けられるフォーカスモジュール３０の内部の回路構成を示す要部ブロック図である。尚、図２に示した要部ブロック図と共通する部分には同一の符号を付し、その詳細な説明は省略する。
【００８４】
図１１に示すブロック図は、図２に示したブロック図と比較すると、主としてレンズ装置１１内に操作部材エンコーダ５６及びカウンタ５７が設けられている点で相違する。
【００８５】
図１２に示すように操作棒１６は、指掛部１８を把持して押し引きすることができ、ポテンショメータ５８は、操作棒１６の押し引きした移動位置を示す信号をズーム速度指令信号として出力する。
【００８６】
また、操作棒１６は、回転範囲に制限がなく、指掛部１８を把持して操作棒１６の軸を回転させることができ、操作部材エンコーダ（インクリメンタルエンコーダ）５６は、操作棒１６の回転量に比例したパルス信号を出力する。従って、この操作棒１６を含むレンズ操作ユニットは、エンドレス対応のレンズ操作ユニットである。
【００８７】
図１１に示したカウンタ５７は、この操作部材エンコーダ５６から出力されるパルス信号を計数し、その計数値を示す制御データFCtrlManu をレンズＣＰＵ５２に出力する。尚、カウンタ５７は、デマンドユニット２８側のカウンタ４２と同様に１４ビットのカウンタで、０〜１６３８３の範囲の制御データFCtrlManu を出力する。
【００８８】
また、図１１に示すようにデマンドＣＰＵ４４から出力される制御データFSig1 は、レンズＣＰＵ５２に制御データFCtrlDemとして入力される。
［レンズ装置が主体となって操作棒／デマンドユニットの切替時の処理等を行う場合］
次に、レンズ装置１２が主体となってデマンドユニット２８のフォーカスノブが操作された場合の処理と、操作棒１６が回転操作された場合の処理について説明する。
【００８９】
図１０に示したようにレンズ装置１２には、操作棒１６とデマンドユニット２８の両方が接続できるようになっている。カメラマンは、撮影状況や好みで操作棒１６又はデマンドユニット２８を適宜切り替えてフォーカスレンズの位置を制御する。
【００９０】
図１３に示すフローチャートにおいて、レンズ装置１２のレンズＣＰＵ５２（図１１参照）は、操作棒１６及びデマンドユニット２８のうちのいずれのフォーカス操作手段が選択されたかを判別する（ステップＳ１００）。尚、この判別は、操作棒側が入力する制御データFCtrlManu と、デマンドユニット側から入力する制御データFCtrlDemのうち、制御データに変化があった方のフォーカス操作手段が現在選択されているものと判別する。また、操作棒１６及びデマンドユニット２８のうちのいずれを使用するかを選択するための切替スイッチをレンズ装置１２又はデマンドユニット２８に設け、この切替スイッチの切替信号に基づいて上記判別を行うようにしてもよい。
【００９１】
ステップＳ１００において、フォーカス操作手段がデマンドユニット２８に切り替えられていると判別されると、デマンドユニット２８のフォーカスノブの操作に基づくフォーカスレンズの位置制御を行うための処理（デマンド処理）を行い（ステップＳ１０２）、フォーカス操作手段が操作棒１６に切り替えられていると判別されると、操作棒１６の回転操作に基づくフォーカスレンズの位置制御を行うための処理（操作棒処理）を行う（ステップＳ１０４）。
【００９２】
次に、ステップＳ１０２におけるデマンド処理について、図１４のフローチャートを参照しながら説明する。
【００９３】
図１４に示すように、先ずデマンドユニットがレンズ装置１２に接続された後の１回目の処理か否かを判別する（ステップＳ１１０）。１回目の処理の場合には、その接続されたデマンドユニットからデマンド情報を読み込み（ステップＳ１１２）、２回目以降の処理の場合にはステップＳ１１２の処理を経由せずにステップＳ１１４に移行する。尚、前記デマンド情報は、エンドレス対応のデマンドユニットかエンドレス未対応のデマンドユニットかを示す情報である。
【００９４】
次に、デマンドユニットから制御データFCtrlDemを読み込む（ステップＳ１１４）。
【００９５】
続いて、ステップＳ１１２で読み込んだデマンド情報によりエンドレス対応のデマンドユニットかエンドレス未対応のデマンドユニットかを判別する（ステップＳ１１６）。エンドレス未対応のデマンドユニットの場合には、ステップＳ１１４で読み込んだ制御データFCtrlDemをそのまま位置指令データFSig2 としてフォーカスモジュール３０に出力する（ステップＳ１１８）。
【００９６】
一方、ステップＳ１１６でエンドレス対応のデマンドユニット（例えば、図１０及び図１１に示したデマンドユニット２８）であることが判別されると、続いてデマンドユニット２８に切り替えられた後の１回目の処理か否かを判別する（ステップＳ１２０）。
【００９７】
デマンドユニット切替後の１回目の処理の場合には、ステップＳ１１４で読み込んだ制御データFCtrlDemをMemoFCtrlDemとして一時保持する（ステップＳ１２２）。また、デマンドユニット２８にエンドレス許可情報を送信する（ステップＳ１２３）。このエンドレス許可情報は、エンドレス対応のレンズ装置１２及びエンドレス未対応のレンズ装置の両方に使用可能なデマンドユニット２８に対して有効な情報であり、このエンドレス許可情報によってデマンドユニット２８からエンドレス対応の制御データFCtrlDemを出力させる。従って、エンドレス対応の制御データFCtrlDemのみを出力するデマンドユニットに切り替えられた場合には、上記エンドレス許可情報の出力は不要である。
【００９８】
一方、デマンドユニット切替後の２回目以降の処理の場合には、上記ステップＳ１２２及びステップＳ１２３の処理を経由せずにステップＳ１２４に移行する。ステップＳ１２４では、MemoFCtrlDemと、ステップＳ１１４で読み込んだ制御データFCtrlDemとの差分を算出し、この差分をRefFCtrlDem とする。尚、デマンドユニット切替１回目の場合には、MemoFCtrlDemとステップＳ１１４で読み込んだ制御データFCtrlDemとが一致するため、前記RefFCtrlDem は０である。
【００９９】
また、MemoFCtrlDemとFCtrlDemとの差分RefFCtrlDem を求める際に、FCtrlDemがオーバーフローした値の場合には、前述した「数１」又は「数２」に示したオーバーフロー用の演算を行う。
【０１００】
次に、フォーカスモジュール３０に出力された前回の位置指令データFSig2 と、ステップＳ１２４で求めた差分RefFCtrlDem とを加算し、この加算値を今回の位置指令データFSig2 とする（ステップＳ１２６）。尚、デマンドユニット切替１回目の場合には、RefFCtrlが０であるため、位置指令データFSig2 は変化せず、これによりデマンドユニット２８を操作しない限り、フォーカスレンズは移動しない。
【０１０１】
続いて、ステップＳ１１４で読み込んだ制御データFCtrlDemを、次回の差分RefFCtrlDem の演算用にMemoFCtrlDemとして一時保持する（ステップＳ１２８）。次に、ステップＳ１２４で求めた今回の位置指令データFSig2 が、位置指令データFSig2 の最小値（０）から位置指令データFSig2 の最大値（１６３８３）の範囲を越えないように制限する（ステップＳ１３０）。
【０１０２】
上記ステップＳ１１０〜ステップＳ１３０のデマンド処理（図１３のステップＳ１０２）を、所定の周期で繰り返し行うことにより、フォーカスノブの操作に応じた時々刻々の位置指令データFSig2 が生成される。
【０１０３】
このようにして生成された位置指令データFSig2 は、フォーカスモジュール３０に出力される（図１３のステップＳ１０６）。
【０１０４】
図１３のステップＳ１００において、フォーカス操作手段が操作棒１６に切り替えられていると判別されると、操作棒１６の回転操作に基づくフォーカスレンズの位置制御を行うための処理（操作棒処理）を行う（ステップＳ１０４）。
【０１０５】
次に、ステップＳ１０４における操作棒処理について、図１５のフローチャートを参照しながら説明する。
【０１０６】
図１５に示すように、まず、操作棒側のカウンタ５７（図１１参照）から制御データFCtrlManu を読み込む（ステップＳ１３２）。
【０１０７】
続いて、操作棒１６に切り替えられた後の１回目の処理か否かを判別する（ステップＳ１３４）。操作棒切替後の１回目の処理の場合には、ステップＳ１３２で読み込んだ制御データFCtrlManu をMemoFCtrlManu として一時保持する（ステップＳ１３６）。
【０１０８】
一方、操作棒切替後の２回目以降の処理の場合には、上記ステップＳ１３６の処理を経由せずにステップＳ１３８に移行する。
【０１０９】
尚、ステップＳ１３８からステップＳ１４４までの処理は、図１４で説明したステップＳ１２４〜ステップＳ１３０の処理と同様なため、その詳細な説明は省略する。但し、ステップＳ１３８において、MemoFCtrlManu とFCtrlManu との差分をRefFCtrlManuとしている。
【０１１０】
上記操作棒処理によって生成された位置指令データFSig2 は、フォーカスモジュール３０に出力される（図１３のステップＳ１０６）。
【０１１１】
以上説明したように上記レンズ装置１２によれば、フォーカス操作手段が操作棒１６からデマンドユニット２８に切り替えられた場合に、その切替時点でフォーカスレンズが移動することがなく、同様にデマンドユニット２８から操作棒１６に切り替えられた場合も、その切替時点でフォーカスレンズが移動することがなく、フォーカス操作手段の切替を円滑に行うことができる。
【０１１２】
尚、この実施の形態では、操作棒１６及びデマンドユニット２８の両方ともエンドレス対応のものを使用した場合について説明したが、例えば、デマンドユニットのみをエンドレス対応のものを使用してもよい。この場合には、操作棒からデマンドユニットへの切替時のみフォーカスレンズを移動させずに行うことができる。
［デマンドユニットが主体となって該デマンドユニットへの切替時の処理等を行う場合］
次に、デマンドユニット２８が主体となってデマンドユニット２８のフォーカスノブが操作された場合の処理と、操作棒１６が回転操作された場合の処理について説明する。
【０１１３】
デマンドユニット２８は、レンズ装置に接続された他のフォーカス操作手段（例えば、操作棒１６）からデマンドユニット２８に切り替えられたことを検知する検知手段を有している。この検知は、例えばデマンドユニット２８に設けられたデマンドユニット／操作棒切替スイッチやフォーカスノブに設けられたタッチセンサからのスイッチ情報に基づいてデマンドＣＰＵ４４が行うことができる。
【０１１４】
そして、デマンドユニットへの切替を検知すると、このデマンドユニット２８は、前述した図７、図８及び図９に示した処理を行う。尚、図８のステップＳ８０では、電源投入１回目か否かの判断の代わりに、デマンドユニット切替１回目か否かの判断を行う。
【０１１５】
このデマンドユニット２８によれば、フォーカス操作手段が操作棒１６等からデマンドユニット２８に切り替えられた場合に、その切替時点でフォーカスレンズが移動することがなく、デマンドユニット２８への切替を円滑に行うことができる。
【０１１６】
尚、この実施の形態では、エンドレス対応のデマンドユニット等のレンズ操作ユニットは、インクリメンタルエンコーダと、このインクリメンタルエンコーダから出力されるパルス信号を計数するカウンタとを有しているが、インクリメンタルエンコーダ及びカウンタの代わりに、アブソリュートエンコーダを有するものや、インクリメンタルエンコーダのみを有するものでもよい。
【０１１７】
そして、インクリメンタルエンコーダのみを有するレンズ操作ユニット、又はこのレンズ操作ユニットが接続されるレンズ装置は、前回と今回の制御データの差分として、前回と今回の処理期間内にインクリメンタルエンコーダから出力されるパルス数を求めればよい。
【０１１８】
【発明の効果】
以上説明したように本発明に係るレンズ装置によれば、通常のエンドレス未対応のレンズ操作ユニットが接続された場合に使用することができるとともに、エンドレス対応のレンズ操作ユニットが接続された場合でも使用することができる。これにより、カメラマンは、撮影状況や好みでエンドレス未対応のレンズ操作ユニット又はエンドレス対応のレンズ操作ユニットを適宜選択して、同一のレンズ装置を使用することができる。
【０１１９】
また、本発明に係るレンズ操作ユニットによれば、通常のエンドレス未対応のレンズ装置に接続して使用することができるとともに、エンドレス対応のレンズ装置に接続しても使用することができる。
【図面の簡単な説明】
【図１】本発明に係るレンズ装置に本発明に係るレンズ操作ユニットが接続された放送用テレビカメラシステム全体の構成を示した斜視図
【図２】図１に示したレンズ装置及びデマンドユニット等の内部の回路構成を示す要部ブロック図
【図３】図１に示したレンズ装置の作用を説明するために用いたフローチャート
【図４】図１に示したレンズ装置の作用を説明するために用いたフローチャート
【図５】図１に示したレンズ装置の作用を説明するために用いたフローチャート
【図６】図１に示したレンズ装置の作用を説明するために用いたフローチャート
【図７】図１に示したデマンドユニットの作用を説明するために用いたフローチャート
【図８】図１に示したデマンドユニットの作用を説明するために用いたフローチャート
【図９】図１に示したデマンドユニットの作用を説明するために用いたフローチャート
【図１０】本発明に係るレンズ装置に本発明に係るレンズ操作ユニットが接続された放送用テレビカメラシステム全体の他の構成を示した斜視図
【図１１】図１０に示したレンズ装置及びデマンドユニット等の内部の回路構成を示す要部ブロック図
【図１２】図１０に示した操作棒の動作を説明するために用いた概念図
【図１３】図１０に示したレンズ装置の作用を説明するために用いたフローチャート
【図１４】図１０に示したレンズ装置の作用を説明するために用いたフローチャート
【図１５】図１０に示したレンズ装置の作用を説明するために用いたフローチャート
【符号の説明】
１０…テレビカメラ、１２…レンズ装置、１４…カメラ本体、１６…操作棒、２８…フォーカスポジションデマンドユニット（デマンドユニット）、３０…フォーカスモジュール、３１、４５、５１、５５…通信インターフェース、４１、５６…操作部材エンコーダ、４２、５７…カウンタ、４４…デマンドＣＰＵ、５２…レンズＣＰＵ、５３…メモリ、５４…フォーカス位置センサ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lens apparatus and a lens operation unit, and particularly to either an endless incompatible lens operation unit having an operation member with a limited movement range or an endless lens operation unit having an operation member with no movement range. The present invention also relates to a lens device that can handle both a lens device that can handle both a lens device that does not support endlessness and a lens device that does not support endlessness.
[0002]
[Prior art]
In a lens apparatus used for a broadcast television camera, as a method for controlling the position of a focus lens, a servo motor is driven by position command data from a lens operation unit such as a focus position demand unit, and the focus lens is driven by the driving force. A servo system for driving is known.
[0003]
In this type of lens operation unit, the range of movement of an operation member such as a focus knob is usually limited (for example, a range of 0 ° to 720 °), and from the closest end in proportion to the rotation position of the operation member. The position command data up to infinity is output. Hereinafter, the lens operation unit is referred to as an endless incompatible lens operation unit, and a lens device corresponding to the lens operation unit is referred to as an endless incompatible lens device.
[0004]
On the other hand, in recent years, a lens operation unit has been proposed in which there is no restriction on the movement range of the operation member. The lens operation unit outputs a number of pulse signals proportional to the amount of movement (rotation amount) of the operation member to the lens device, and the lens device counts the pulse signals and generates position command data from the counted value. is doing. Hereinafter, the lens operation unit is referred to as an endless lens operation unit, and the lens device corresponding to the lens operation unit is referred to as an endless lens device.
[0005]
[Problems to be solved by the invention]
By the way, the conventional lens apparatus has an endless lens operation unit that outputs position command data corresponding one-to-one with the operation position of the operation member, and an endless output unit that outputs data corresponding to the relative movement amount of the operation member. There was a problem that both of the corresponding lens operation units could not be used.
[0006]
Similarly, the conventional lens operation unit has a problem that it cannot be used for both an endless lens device and an endless lens device.
[0007]
The present invention has been made in view of such circumstances, and provides a lens device that can use both an endless lens operation unit and an endless lens operation unit, and an endless lens device. It is another object of the present invention to provide a lens operation unit that can be used for both an endless lens device and an endless lens device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a lens apparatus according to claim 1 includes a first operation member that is not limited in a movement range, and receives first lens control data corresponding to a movement amount of the first operation member. A first lens operating unit for outputting and a second operating member for which the movement range is limited; An interface that can be selectively connected to the second lens operation unit, a determination unit that determines which of the first or second lens operation unit is connected, and the first lens operation unit is connected If it is determined that it has been set, it is limited not to exceed a predetermined lower limit or upper limit based on the first lens control data input via the interface, and exceeds the lower limit or upper limit. Position command data in which the lower limit value or the upper limit value is maintained with respect to the movement of the first operating member in the direction is generated, the position command data is output to a lens driving means for driving a lens, and the second Control means for outputting the second lens control data input via the interface to the lens driving means as position command data when it is determined that the lens operating unit is connected. It is a feature.
[0009]
The lens device determines which of the first or second lens operation unit is connected, and depends on whether the first lens operation unit is connected or the second lens operation unit is connected. The processing for the input lens control data is changed. That is, when it is determined that the first lens operation unit is connected, the predetermined lower limit value or upper limit value is limited based on the first lens control data, and the lower limit value or upper limit value is set. Position command data that maintains the lower limit value or the upper limit value with respect to the movement of the first operating member in a direction exceeding the position is generated, the position command data is output to a lens driving unit that drives the lens, and the second When it is determined that the lens operation unit is connected, the second lens control data is output as position command data to the lens driving means.
[0010]
According to another aspect of the present invention, the first lens operation unit counts an incremental encoder that outputs a number of pulse signals proportional to the amount of movement of the first operation member, and a pulse signal output from the incremental encoder. And outputs a count value of a predetermined number of bits of the counter as the first lens control data, or the first lens control data corresponding to the amount of movement of the first operating member. It has an absolute encoder for outputting.
[0011]
According to a third aspect of the present invention, when it is determined that the first lens operation unit is connected, the control unit outputs the previous position command data output to the lens driving unit and the first lens. A difference between the first lens control data sequentially sampled from the operation unit, and when the first lens control data overflows, an addition value obtained by adding the difference obtained in consideration of the overflow is obtained. The added value obtained by limiting the added value so as not to exceed the predetermined lower limit value and upper limit value is output to the lens driving means as current position command data. The first lens control data fluctuates in the range from the minimum value (0) to the maximum value of the value of the predetermined number of bits. Therefore, if the first lens control data moves in the plus direction beyond the maximum value, it overflows to 0, When moving in the negative direction beyond 0, it overflows to the maximum value. Therefore, in the case of overflow, when calculating the difference between the first lens control data, the correct difference is obtained in consideration of the overflow. The added value may exceed the lower limit value or upper limit value of the command value indicating the lens movement range. In this case, the added value is limited so as not to exceed the lower limit value or upper limit value.
[0012]
According to a fourth aspect of the present invention, the first lens operation unit includes an incremental encoder that outputs, as the first lens control data, a number of pulse signals proportional to the amount of movement of the first operation member. When it is determined that the first lens operation unit is connected, the control means outputs the previous position command data output to the lens driving means and the time between the previous processing time and the current processing time. An addition value obtained by adding a count value obtained by counting the pulse signals output from the incremental encoder is obtained, and an addition value obtained by limiting the addition value so as not to exceed the predetermined lower limit value and upper limit value is determined as the current position. The command data is output to the lens driving means.
[0013]
According to a fifth aspect of the present invention, the discriminating means is type information input from the first or second lens operation unit via the interface, or switching for instructing switching of the first or second lens operation unit. It is characterized in that it is determined which of the first or second lens operation unit is connected based on a switching signal input from the means.
[0014]
According to a sixth aspect of the present invention, in a lens operation unit connectable to a lens apparatus, an operation member having no limitation on a movement range, output means for outputting lens control data corresponding to a movement amount of the operation member, and the lens A position that is restricted so as not to exceed a predetermined lower limit value or upper limit value based on the control data, and that the lower limit value or upper limit value is maintained with respect to movement of the operating member in a direction exceeding the lower limit value or upper limit value. And control means for generating command data and outputting the position command data to the lens apparatus.
[0015]
This lens operation unit has no limitation on the movement range of the operation member, and outputs the same position command data as a conventional lens operation unit with a limitation on the movement range of the operation member. Can do.
[0016]
According to a seventh aspect of the present invention, there is provided a first lens device which is the lens device according to any one of the first to fifth aspects, or a second lens device which outputs the input position command data as it is to a lens driving means for driving the lens. In a lens operation unit that can be connected to the lens device, an operation member having no limitation on a movement range, an output unit that outputs lens control data corresponding to a movement amount of the operation member, and the first or second lens device. When it is determined that the first lens apparatus is connected to a determination unit that determines which of the two lenses is connected, the lens control data is output to the first lens apparatus, and the second lens is output. When it is determined that it is connected to the apparatus, the lens control data is limited so as not to exceed the predetermined lower limit value or upper limit value, and the previous direction in which the lower limit value or upper limit value is exceeded is determined. Control means for generating position command data for maintaining the lower limit value or the upper limit value with respect to the movement of the operation member, and outputting the position command data to the second lens device. .
[0017]
This lens operation unit can be used for both the first lens device capable of endlessness and the second lens device not compatible with endlessness. That is, the data to be output is changed depending on whether it is connected to the first lens device or the second lens device, and if it is determined that it is connected to the first lens device, the lens The control data is output to the first lens device. In this case, endless signal processing is performed by the lens apparatus as described in claims 1 to 5. On the other hand, if it is determined that it is connected to the second lens device, it is restricted so as not to exceed a predetermined lower limit value or upper limit value based on the lens control data, and in a direction exceeding the lower limit value or upper limit value. Position command data that maintains the lower limit value or the upper limit value with respect to the movement of the operation member is generated, and the position command data is output to the second lens device.
[0018]
The output means includes an incremental encoder that outputs a number of pulse signals proportional to the amount of movement of the operation member, and a counter that counts the pulse signals output from the incremental encoder, An absolute encoder is provided that outputs a count value of a predetermined number of bits of the counter as the lens control data or outputs the lens control data in accordance with the movement amount of the operation member.
[0019]
According to another aspect of the present invention, when it is determined that the control unit is connected to the second lens device, the control unit determines that the control unit is connected to the second lens device. The difference between the previous position command data output to the lens device and each lens control data sequentially sampled from the output means, and the difference obtained in consideration of the overflow when the lens control data overflows And an addition value obtained by limiting the addition value so as not to exceed the predetermined lower limit value and upper limit value is output to the second lens device as current position command data. It is a feature.
[0020]
The output means includes an incremental encoder that outputs, as the lens control data, a number of pulse signals proportional to the amount of movement of the operation member, and the control means includes the second lens device. If it is determined that it is connected to the previous position command data output to the second lens device, and a pulse signal output from the incremental encoder between the previous processing time and the current processing time An added value obtained by adding the counted value to the second lens device is obtained by using an added value obtained by limiting the added value so as not to exceed the predetermined lower limit value and upper limit value as current position command data. It is characterized by being output to.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of a lens apparatus and a lens operation unit according to the present invention will be described below in detail with reference to the accompanying drawings.
[0022]
FIG. 1 is a perspective view showing the entire configuration of a broadcasting television camera system in which a lens operating unit according to the present invention is connected to a lens apparatus according to the present invention.
[0023]
As shown in the figure, the television camera 10 includes a lens device 12 according to the present invention and a camera main body 14, and the lens device 12 is mounted on the front side of the camera main body 14 placed on the camera platform 22. The
[0024]
A zoom rate demand unit 26 and a lens operation unit (focus position demand unit) 28 according to the present invention are installed at the tips of pan / tilt rods 24A and 24B extending from the camera platform 22, respectively. The zoom rate demand unit 26 outputs zoom speed command data for instructing a zoom speed to the lens device 12 via a cable.
[0025]
The focus position demand unit 28 has a focus knob 28A whose rotation range is not limited, and outputs data corresponding to the rotation amount of the focus knob 28A to the lens device via a cable. Different data is output depending on whether the lens device 12 is connected to a lens device 12 that is not compatible with an endless lens device.
[0026]
The cameraman performs a zoom operation by turning the thumb ring 26A of the zoom rate demand unit 26 with his / her thumb while watching the video image displayed on the viewfinder 20 of the camera body 14, and turns the focus knob 28A of the focus position demand unit 28. The focus operation is performed by moving the operation.
[0027]
In FIG. 1, 14 </ b> A is an operation rod insertion hole 14 </ b> A to which an operation rod 16 (see FIG. 11) used when operating the lens device 12 with a single-axis two-operation type is attached.
[0028]
FIG. 2 is a principal block diagram showing the internal circuit configuration of the lens device 12, the focus position demand unit 28 (hereinafter simply referred to as “demand unit 28”) and the focus module 30 attached to the lens device.
[0029]
The demand unit 28 is a digital demand unit that can be used for both an endless incompatible lens device and an endless compatible lens device, and an operation member encoder (incremental encoder) 41 that outputs a number of pulse signals proportional to the amount of rotation of the focus knob 28A. A counter 42 that counts the pulse signal output from the operation member encoder 41 and outputs the count value as control data FCtrl1, and a switch information input unit 43 that inputs switch information from a return switch, a focus preset switch, and the like. And a demand central processing unit (demand CPU) 44 that performs overall control of the entire demand unit, and a communication interface 45.
[0030]
The counter 42 is a 14-bit counter, for example, and outputs control data FCtrl1 in the range of 0 to 16383. When the focus knob 28A is operated in the plus direction (infinity side) and the count value overflows (exceeds 16383), the count value returns to 0, and the focus knob 28A is operated in the minus direction (closest side). When the count value overflows (exceeds 0), the count value returns to 16383.
[0031]
The demand CPU 44 inputs the control data FCtrl1 and the switch information, and also inputs necessary information (lens information including endless permission information described later, position command data, etc.) through communication with the lens CPU 52 on the lens device 12 side. Then, control data FSig1 is generated based on the control data FCtrl1 and the information, and the control data FSig1 is output to the lens device 12 via the communication interface 45. Details of processing in the demand CPU 44 will be described later.
[0032]
The lens device 12 is a digital lens device that can be used for both endless-incompatible and endless-compatible demand units, and includes a communication interface 51 for exchanging data with the demand unit, and a lens that controls the entire lens. A CPU 52, a nonvolatile memory 53 for storing position command data, a focus position sensor 54 for detecting the lens position of the focus lens, and a communication interface 55 for transmitting position command data and lens position data to the focus module 30 It consists of and.
[0033]
The communication interface 51 has an interface of a digital demand unit and an analog demand unit (a demand unit that outputs position command data as a voltage signal), and the lens CPU 52 is usually digital with the voltage of one line of the communication interface 51. It is determined whether a demand unit is connected, an analog demand unit is connected, or no demand unit is connected.
[0034]
The lens CPU 52 performs processing corresponding to the type of demand unit connected to the control data FCtrl2 input via the communication interface 51 to generate position command data FSig2, and the focus module 30 via the communication interface 55. Output to. Further, lens position data indicating the current position of the focus lens detected by the focus position sensor 54 is output to the focus module 30 via the communication interface 55. Details of processing in the lens CPU 52 will be described later.
[0035]
The focus module 30 includes a communication interface 31, a module CPU 32, and a focus drive unit 33 including a focus motor.
[0036]
The module CPU 32 communicates with the lens CPU 52 via the communication interface 31, and outputs a control signal to the focus driving unit 33 based on the position command data FSig2 and the lens position data input from the lens device 12, thereby driving the focus. The unit 33 drives the focus motor based on a control signal input from the demand CPU 32 to move the focus lens. As a result, the focus lens is servo-controlled so as to be in a focus position corresponding to the position command data FSig2.
[When endless processing and standard processing are performed mainly by the lens device]
Next, the case where the lens device 12 is mainly used to perform endless processing and processing that does not support endless (standard processing) will be described.
[0037]
As shown in the flowchart of FIG. 3, the lens CPU 52 (see FIG. 2) of the lens device 12 first determines whether the demand unit connected to the communication interface 51 is a digital demand unit or an analog demand unit (step S10). This determination can be made based on the voltage of one line of the communication interface 51 as described above. Further, a changeover switch for selecting the type of demand unit may be provided in the lens device 12, and the above determination may be made based on a changeover signal of the changeover switch.
[0038]
If it is determined that the analog demand unit is connected, standard processing is performed (step S12).
[0039]
In this standard process, as shown in FIG. 4, the control data FCtrl2 which is a voltage signal indicating the lens position from the closest to infinity input from the analog demand unit is read (step S30), and this is read into the digital position command data FSig2. The converted signal or the analog signal is output to the focus module 30 (step S24 in FIG. 3).
[0040]
If it is determined in step S10 that the digital demand unit is connected, it is determined whether or not this is the first process after the digital demand unit is connected (step S14). In the case of the first process, after demand information is read from the connected digital demand unit (step S16), the process proceeds to step S18, and in the case of the second and subsequent processes, the process of step S16 is performed. Without proceeding to step S18.
[0041]
The demand information is information indicating whether an endless digital demand unit or an endless incompatible digital demand unit. Here, the endless incompatible digital demand unit has a limited movement range of an operating member such as a focus knob that has a limited moving range, and from the closest end corresponding to the moving position of the operating member one-on-one. The one that outputs digital position command data up to infinity. The demand information may be read from a changeover switch for selecting the type of demand unit.
[0042]
In step S18, it is determined whether the demand information is an endless digital demand unit or an endless digital demand unit. If it is an endless digital demand unit, the process proceeds to step S20, and the standard processing shown in FIG. I do. That is, digital control data FCtrl2 indicating the lens position from the closest to infinity input from a digital demand unit that does not support endlessness is read (step S30 in FIG. 4), and is output as it is to the focus module 30 as position command data FSig2. (Step S24 in FIG. 3).
[0043]
On the other hand, if it is determined in step S18 that the digital demand unit is endless (for example, the demand unit 28 shown in FIGS. 1 and 2), the endless processing shown in FIG. 5 is performed (step S22).
[0044]
In the endless process, as shown in FIG. 5, the control data FCtrl2 is read from the demand unit 28 (step S40). During the endless processing, the demand unit 28 outputs the control data FCtrl1 from the counter 42 as it is as the control data FSig1, and the lens device 12 reads this control data FSig1 as the control data FCtrl2 during the endless processing. .
[0045]
Next, it is determined whether or not it is the first process after the lens apparatus 12 is powered on (step S42).
[0046]
In the case of the first processing after the power is turned on, the lens CPU 52 reversely calculates the position command data FSig2 from the lens position data indicating the current position of the focus lens detected by the focus position sensor 54, and this is calculated as the lens initial value FSig2. (Step S44). Further, the control data FCtrl2 read in step S40 is temporarily held as MemoFCtrl (step S46). In the case of the second and subsequent processes after the power is turned on, the process proceeds to step S48 without going through the processes in steps S44 and S46.
[0047]
In step S48, it is determined whether or not it is the first process after the demand unit 28 is connected (step S48). In the case of the first process after connection, the control data FCtrl2 read in step S40 is temporarily stored as MemoFCtrl (step S50). Also, endless permission information is transmitted to the demand unit 28 (step S52). This endless permission information is valid information for the demand unit 28 that can be used for both the endless lens device 12 and the endless lens device. The endless permission information allows the demand unit 28 to control endless. Output data FSig1. Therefore, when a demand unit that outputs only endless compatible control data FSig1 is connected, it is not necessary to output the endless permission information.
[0048]
On the other hand, in the case of the second and subsequent processes after the demand unit is connected, the process proceeds to step S53 without going through the processes of steps S50 and S52. In step S53, a difference between MemoFCtrl and the control data FCtrl2 read in step S40 is calculated, and this difference is set as RefFCtrl. In the case of the first power-on or the first demand-unit connection, MemoFCtrl and the control data FCtrl2 read in step S40 match, so the RefFCtrl is 0.
[0049]
Further, when the difference RefFCtrl between MemoFCtrl and FCtrl2 is obtained, if the value of FCtrl2 overflows, the difference RefFCtrl is obtained as follows.
[0050]
That is, no matter how fast the focus knob is rotated, the difference RefFCtrl does not exceed 10,000 within a predetermined sampling period. Therefore, if the difference RefFCtrl exceeds ± 10000, the counter 42 determines that the overflow has occurred.
[0051]
For example, if the previous FCtrl2 is 16300 and the current FCtrl2 is 115, the difference RefFCtrl is −16185. In this case, it is determined that the overflow has occurred on the plus side,
[0052]
[Expression 1]

To find the correct difference.
[0053]
When the previous FCtrl2 is 35 and the current FCtrl2 is 16282, the difference is 16247. In this case, it is determined that it has overflowed to the negative side,
[0054]
[Expression 2]

To find the correct difference.
[0055]
Next, the previous position command data FSig2 output to the focus module 30 and the difference RefFCtrl obtained in step S53 are added, and this added value is used as the current position command data FSig2 (step S54). In the case of the first power-on process, since there is no previous position command data FSig2, the lens initial value FSig2 obtained in step S44 is used. In the first power-on or first-time demand unit connection, since RefFCtrl is 0, the position command data FSig2 does not change, and the focus lens does not move unless the demand unit 28 is operated.
[0056]
Subsequently, the control data FCtrl2 read in step S40 is temporarily held as MemoFCtrl for the next calculation of the difference RefFCtrl (step S55).
[0057]
Next, the current position command data FSig2 obtained in step S54 is restricted so as not to exceed the range of the minimum value (0) of the position command data FSig2 to the maximum value (16383) of the position command data FSig2 (step S56). . That is, when the current position command data FSig2 obtained in step S54 is 0 or less, it is limited to 0, and when it is 16383 or more, it is limited to 16383.
[0058]
By repeatedly performing the endless processing (step S22 in FIG. 3) in steps S40 to S56 at a predetermined cycle, position command data FSig2 is generated every moment according to the operation of the focus knob.
[0059]
The position command data FSig2 generated in this way is output to the focus module 30 (step S24 in FIG. 3).
[0060]
FIG. 6 is a flowchart showing a modification of the endless process shown in FIG. Steps that perform the same processing as the processing shown in FIG. 5 are given the same step numbers, and detailed descriptions thereof are omitted.
[0061]
The endless process shown in FIG. 6 differs from the endless process shown in FIG. 5 only in the method of setting the initial lens value at the first power-on. That is, in the endless process shown in FIG. 5, the initial lens initial value when the power is turned on is the position command data FSig2 calculated backward from the lens position data (step S44), but the endless process shown in FIG. Is stored in the nonvolatile memory 53 (see FIG. 2) (step S58), and the initial lens initial value when the power is turned on is the position command data FSig2 read from the memory 53. (Step S57).
[0062]
In the flowchart shown in FIG. 6, the position command data FSig2 is stored in the memory 53 every time. However, the present invention is not limited to this, and the position command data FSig2 output to the focus module 30 prior to power-off only when the power is turned off. May be stored. According to this, even if the power of the lens device 12 is turned on / off, the focus lens does not move unless the demand unit 28 is operated.
[0063]
The lens device 12 having the above-described configuration can be used as either a normal demand unit that does not support endless or a demand unit that supports endless.
[When endless processing and standard processing are performed mainly by the demand unit]
Next, a case where the demand unit 28 mainly performs endless processing and endless incompatible processing (standard processing) will be described.
[0064]
As shown in the flowchart of FIG. 7, the demand CPU 44 (see FIG. 2) of the demand unit 28 first reads a demand signal (step S60). The demand signal includes various switch signals from the switch information unit 43 in addition to the 14-bit control data FCtrl1 read from the counter 42.
[0065]
Next, it is determined whether the lens device connected to the communication interface 45 is a digital lens device or an analog lens device (step S62). This determination can be made based on the voltage of one line of the communication interface 45. Further, a changeover switch for selecting the type of the lens device may be provided in the demand unit 28, and the lens device may be discriminated based on a changeover signal of the changeover switch.
[0066]
If it is determined that it is connected to the analog lens device, standard processing is performed (step S64).
[0067]
As shown in FIG. 8, it is determined whether or not this standard process is the first process after the lens apparatus 12 is powered on (step S80). In the case of the first processing after the power is turned on, the demand CPU 44 reads lens position data from a focus position sensor provided on the lens device side, and back-calculates position command data FSig1 from this lens position data, The initial value is FSig1 (step S81). Further, the control data FCtrl1 read in step S60 in FIG. 7 is temporarily held as MemoFCtrl (step S82). In step S81, instead of the position command data FSig1 calculated from the lens position data, the position command data output to the focus module 30 before the power-off is read from the memory as described in step S57 in FIG. This may be the lens initial value FSig1.
[0068]
On the other hand, in the case of the second and subsequent processes after the power is turned on, the process proceeds to step S83 without going through the processes of steps S81 and S82.
[0069]
Thereafter, the processing of step S83 to step S86 is sequentially performed. Since the processing in step S83 to step S86 is similar to the processing of step S53 to step S56 described in FIG. 5, detailed description thereof is omitted.
[0070]
The position command data FSig1 generated by the standard processing is converted into a voltage signal by a D / A converter (not shown) (step S66 in FIG. 7), and then output to the analog lens device.
[0071]
Returning to FIG. 7, if it is determined in step S62 that the digital lens apparatus is connected, lens information is read from the connected digital lens apparatus (step S68). This lens information is information indicating whether the digital lens device is compatible with endless or not compatible with endless.
[0072]
When the demand unit 28 is connected to the lens device 12, the endless permission information (see step S52 in FIG. 5) transmitted from the lens device 12 indicates that the digital lens device is endless. Information. Further, as described above, the lens information may be information (switching signal) from a selector switch that selects the type of lens device.
[0073]
Further, the endless compatible digital lens device is a lens device that can be used when the control data FCtrl1 from the counter 42 shown in FIG. 2 is input as it is, for example, and the endless incompatible digital lens device is, for example, FIG. This lens apparatus can cope with the case where the standard processed position command data FSig1 shown in FIG.
[0074]
Based on the lens information, it is determined whether the digital lens device is compatible with endless or not compatible with endless (step S70). If the digital lens device does not support endlessness, the process proceeds to step S72. In step S72, the standard processing described in FIG. 8 is performed, and the position command data FSig1 generated by this standard processing is output to a digital lens device that does not support endlessness.
[0075]
On the other hand, if it is determined in step S70 that the digital demand unit is compatible with endless (for example, the lens device 12 shown in FIGS. 1 and 2), endless processing shown in FIG. 9 is performed (step S74).
[0076]
In this endless processing, as shown in FIG. 9, the control data FCtrl1 in the range of 0 to 16383, which is the count value of the 14-bit counter 42 (see FIG. 2), is read, and the control data FCtrl1 is directly replaced with the control data FSig1. This is an output process (step S90). When the focus knob 28A is operated in the plus direction (infinity side) and the count value of the counter 42 overflows (exceeds 16383), the count value returns to 0, and the focus knob 28A moves in the minus direction (closest side). If the counter value of the counter 42 is overflowed (exceeds 0), the count value returns to 16383.
[0077]
The endless-processed control data FSig1 is output to the endless compatible digital demand unit.
[0078]
The demand unit 28 having the above-described configuration can be used for either a normal lens device that does not support endlessness or a lens device that supports endlessness.
[0079]
FIG. 10 is a perspective view showing another configuration of the entire broadcasting television camera system in which the lens operation unit according to the present invention is connected to the lens apparatus according to the present invention. In FIG. 10, the same reference numerals are given to portions common to FIG. 1, and detailed description thereof is omitted.
[0080]
The overall configuration of the broadcast television camera system shown in FIG. 10 is different from that shown in FIG. 1 in that an operation rod 16 is attached.
[0081]
The operation bar 16 passes through an operation bar insertion hole 14 </ b> A (see FIG. 1) formed in the camera body 14 and protrudes to the back side of the camera body 14. The cameraman can perform a zooming operation by grasping the finger hook portion 18 of the operation bar 16 and pushing and pulling the operation bar 16 while watching the image reflected on the viewfinder 20 of the camera body 14. The focus operation can be performed by rotating the finger hook 18 and rotating the axis of the operation rod 16.
[0082]
Which of the operation bar 16, the zoom rate demand unit 26, and the demand unit 28 is used to perform the focus operation and the zoom operation can be selected according to the shooting situation and the photographer's preference.
[0083]
FIG. 11 is a principal block diagram showing an internal circuit configuration of the lens device 12, the demand unit 28, and the focus module 30 attached to the lens device. In addition, the same code | symbol is attached | subjected to the part which is common in the principal part block diagram shown in FIG. 2, and the detailed description is abbreviate | omitted.
[0084]
The block diagram shown in FIG. 11 is different from the block diagram shown in FIG. 2 in that an operation member encoder 56 and a counter 57 are mainly provided in the lens device 11.
[0085]
As shown in FIG. 12, the operation rod 16 can hold and push the finger hook portion 18, and the potentiometer 58 outputs a signal indicating the moved position of the operation rod 16 as a zoom speed command signal. .
[0086]
Further, the operation rod 16 has no limitation on the rotation range, and can grip the finger hook portion 18 to rotate the shaft of the operation rod 16. The operation member encoder (incremental encoder) 56 can rotate the rotation amount of the operation rod 16. A pulse signal proportional to is output. Therefore, the lens operation unit including the operation rod 16 is an endless lens operation unit.
[0087]
The counter 57 shown in FIG. 11 counts the pulse signal output from the operation member encoder 56 and outputs control data FCtrlManu indicating the counted value to the lens CPU 52. The counter 57 is a 14-bit counter similar to the counter 42 on the demand unit 28 side, and outputs control data FCtrlManu in the range of 0 to 16383.
[0088]
In addition, as shown in FIG. 11, the control data FSig1 output from the demand CPU 44 is input to the lens CPU 52 as control data FCtrlDem.
[When the lens device is the main component for processing when switching the operation rod / demand unit]
Next, a process when the focus knob of the demand unit 28 is operated mainly by the lens device 12 and a process when the operation rod 16 is rotated will be described.
[0089]
As shown in FIG. 10, both the operation rod 16 and the demand unit 28 can be connected to the lens device 12. The photographer controls the position of the focus lens by appropriately switching the operation rod 16 or the demand unit 28 according to the shooting situation or preference.
[0090]
In the flowchart shown in FIG. 13, the lens CPU 52 (see FIG. 11) of the lens device 12 determines which focus operation means is selected from the operation rod 16 and the demand unit 28 (step S <b> 100). In this determination, it is determined that the focus operation means whose control data has changed among the control data FCtrlManu input from the operation bar side and the control data FCtrlDem input from the demand unit side is currently selected. . In addition, a switch for selecting which of the operation rod 16 and the demand unit 28 is used is provided in the lens device 12 or the demand unit 28, and the above determination is performed based on the switching signal of the switch. May be.
[0091]
If it is determined in step S100 that the focus operation means has been switched to the demand unit 28, a process (demand process) for controlling the position of the focus lens based on the operation of the focus knob of the demand unit 28 is performed (step process). S102) When it is determined that the focus operation means has been switched to the operation bar 16, a process (operation bar process) for controlling the position of the focus lens based on the rotation operation of the operation bar 16 is performed (step S104). .
[0092]
Next, the demand process in step S102 will be described with reference to the flowchart of FIG.
[0093]
As shown in FIG. 14, first, it is determined whether or not the demand unit is the first process after being connected to the lens device 12 (step S110). In the case of the first process, the demand information is read from the connected demand unit (step S112). In the second and subsequent processes, the process proceeds to step S114 without going through the process of step S112. The demand information is information indicating whether an endless demand unit or an endless incompatible demand unit.
[0094]
Next, the control data FCtrlDem is read from the demand unit (step S114).
[0095]
Subsequently, it is determined from the demand information read in step S112 whether it is an endless demand unit or an endless demand unit (step S116). In the case of a demand unit that does not support endlessness, the control data FCtrlDem read in step S114 is directly output to the focus module 30 as position command data FSig2 (step S118).
[0096]
On the other hand, if it is determined in step S116 that the demand unit is an endless demand unit (for example, the demand unit 28 shown in FIGS. 10 and 11), the first process after the switch to the demand unit 28 is performed. It is determined whether or not (step S120).
[0097]
In the case of the first process after switching the demand unit, the control data FCtrlDem read in step S114 is temporarily held as MemoFCtrlDem (step S122). Also, endless permission information is transmitted to the demand unit 28 (step S123). This endless permission information is valid information for the demand unit 28 that can be used for both the endless lens device 12 and the endless lens device. The endless permission information allows the demand unit 28 to control endless. Output data FCtrlDem. Therefore, when the demand unit is switched to output only the control data FCtrlDem corresponding to endless, the output of the endless permission information is not necessary.
[0098]
On the other hand, in the case of the second and subsequent processes after switching the demand unit, the process proceeds to step S124 without going through the processes of steps S122 and S123. In step S124, a difference between MemoFCtrlDem and the control data FCtrlDem read in step S114 is calculated, and this difference is set as RefFCtrlDem. In the case of the first demand unit switching, since MemoFCtrlDem matches the control data FCtrlDem read in step S114, the RefFCtrlDem is 0.
[0099]
When the difference RefFCtrlDem between MemoFCtrlDem and FCtrlDem is obtained, if the FCtrlDem overflows, the calculation for overflow shown in the above “Equation 1” or “Equation 2” is performed.
[0100]
Next, the previous position command data FSig2 output to the focus module 30 and the difference RefFCtrlDem obtained in step S124 are added, and this added value is used as the current position command data FSig2 (step S126). In the first demand unit switching, since RefFCtrl is 0, the position command data FSig2 does not change, and the focus lens does not move unless the demand unit 28 is operated.
[0101]
Subsequently, the control data FCtrlDem read in step S114 is temporarily held as MemoFCtrlDem for the next calculation of the difference RefFCtrlDem (step S128). Next, the current position command data FSig2 obtained in step S124 is restricted so as not to exceed the range of the minimum value (0) of the position command data FSig2 to the maximum value (16383) of the position command data FSig2 (step S130). .
[0102]
By repeatedly performing the demand processing in steps S110 to S130 (step S102 in FIG. 13) at a predetermined cycle, position command data FSig2 is generated every moment according to the operation of the focus knob.
[0103]
The position command data FSig2 generated in this way is output to the focus module 30 (step S106 in FIG. 13).
[0104]
If it is determined in step S100 in FIG. 13 that the focus operation means has been switched to the operation rod 16, a process (operation rod processing) for controlling the position of the focus lens based on the rotation operation of the operation rod 16 is performed. (Step S104).
[0105]
Next, the operation bar process in step S104 will be described with reference to the flowchart of FIG.
[0106]
As shown in FIG. 15, first, the control data FCtrlManu is read from the counter 57 on the operating rod side (see FIG. 11) (step S132).
[0107]
Subsequently, it is determined whether or not it is the first process after switching to the operation bar 16 (step S134). In the case of the first process after switching the operation bar, the control data FCtrlManu read in step S132 is temporarily held as MemoFCtrlManu (step S136).
[0108]
On the other hand, in the case of the second and subsequent processes after the operation bar switching, the process proceeds to step S138 without going through the process of step S136.
[0109]
Note that the processing from step S138 to step S144 is the same as the processing from step S124 to step S130 described in FIG. However, in step S138, the difference between MemoFCtrlManu and FCtrlManu is set as RefFCtrlManu.
[0110]
The position command data FSig2 generated by the operation bar process is output to the focus module 30 (step S106 in FIG. 13).
[0111]
As described above, according to the lens device 12, when the focus operating means is switched from the operating rod 16 to the demand unit 28, the focus lens does not move at the time of switching, and similarly from the demand unit 28. Even when the operation rod 16 is switched, the focus lens does not move at the time of switching, and the focus operation means can be switched smoothly.
[0112]
In this embodiment, the case where both the operation rod 16 and the demand unit 28 are endless compatible has been described. However, for example, only the demand unit may be endless compatible. In this case, the focus lens can be moved only when switching from the operating rod to the demand unit.
[When the demand unit takes the lead in processing when switching to the demand unit]
Next, a process when the demand unit 28 is mainly operated and the focus knob of the demand unit 28 is operated and a process when the operation rod 16 is rotated are described.
[0113]
The demand unit 28 has detection means for detecting that the focus unit 28 has been switched from another focus operation means (for example, the operation rod 16) connected to the lens device. This detection can be performed by the demand CPU 44 based on, for example, switch information from a demand unit / operation rod switch provided in the demand unit 28 or a touch sensor provided in the focus knob.
[0114]
When the switch to the demand unit is detected, the demand unit 28 performs the processing shown in FIGS. 7, 8 and 9 described above. In step S80 of FIG. 8, it is determined whether or not it is the first demand unit switching, instead of determining whether or not the power is turned on for the first time.
[0115]
According to the demand unit 28, when the focus operation means is switched from the operation rod 16 or the like to the demand unit 28, the focus lens does not move at the time of switching, and the switching to the demand unit 28 is performed smoothly. be able to.
[0116]
In this embodiment, the lens operation unit such as an endless demand unit has an incremental encoder and a counter that counts pulse signals output from the incremental encoder. Instead, one having an absolute encoder or one having only an incremental encoder may be used.
[0117]
The lens operation unit having only the incremental encoder, or the lens apparatus to which the lens operation unit is connected, determines the number of pulses output from the incremental encoder during the previous and current processing periods as the difference between the previous and current control data. You can ask for.
[0118]
【The invention's effect】
As described above, the lens device according to the present invention can be used when a normal lens operation unit that does not support endlessness is connected, and can also be used when a lens operation unit that supports endlessness is connected. can do. Accordingly, the cameraman can use the same lens device by appropriately selecting a lens operation unit that does not support endless or a lens operation unit that supports endless depending on the shooting situation and preference.
[0119]
Further, the lens operating unit according to the present invention can be used by connecting to a normal endless lens device, and can also be used by connecting to an endless lens device.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of an entire broadcasting television camera system in which a lens operation unit according to the present invention is connected to a lens apparatus according to the present invention. FIG. 2 shows a lens apparatus, a demand unit, and the like shown in FIG. FIG. 3 is a main part block diagram showing an internal circuit configuration of FIG. 3. FIG. 4 is a flowchart used for explaining the operation of the lens device shown in FIG. 1. FIG. 4 is for explaining the operation of the lens device shown in FIG. Flowchart used FIG. 5 is a flowchart used to explain the operation of the lens device shown in FIG. 1. FIG. 6 is a flowchart used to explain the operation of the lens device shown in FIG. FIG. 8 is a flowchart used to explain the operation of the demand unit shown in FIG. 1. FIG. 8 is a flowchart used to explain the operation of the demand unit shown in FIG. FIG. 10 is a flow chart used to explain the operation of the demand unit shown in FIG. 10. FIG. 10 shows another configuration of the entire broadcasting television camera system in which the lens operation unit according to the present invention is connected to the lens apparatus according to the present invention. FIG. 11 is a principal block diagram showing the internal circuit configuration of the lens apparatus and the demand unit shown in FIG. 10. FIG. 12 is a conceptual diagram used to explain the operation of the operation rod shown in FIG. 13 is a flowchart used to explain the operation of the lens device shown in FIG. 10. FIG. 14 is a flowchart used to explain the operation of the lens device shown in FIG. 10. FIG. 15 is shown in FIG. Flow chart used to explain the operation of the lens device
DESCRIPTION OF SYMBOLS 10 ... Television camera, 12 ... Lens apparatus, 14 ... Camera body, 16 ... Operation rod, 28 ... Focus position demand unit (demand unit), 30 ... Focus module, 31, 45, 51, 55 ... Communication interface, 41, 56 ... operation member encoder, 42, 57 ... counter, 44 ... demand CPU, 52 ... lens CPU, 53 ... memory, 54 ... focus position sensor

Claims (10)

A first lens operating unit that has a first operating member that has no restriction on the movement range, and that outputs first lens control data corresponding to the amount of movement of the first operating member, and a movement range is limited. An interface that has a second operation member and is selectively connectable to a second lens operation unit that outputs second lens control data corresponding to the moving position of the second operation member on a one-to-one basis;
A discriminating means for discriminating which one of the first and second lens operation units is connected;
When it is determined that the first lens operation unit is connected, the first lens control data input via the interface is limited so as not to exceed a predetermined lower limit value or upper limit value. In addition, position command data that maintains the lower limit value or the upper limit value with respect to the movement of the first operation member in a direction exceeding the lower limit value or the upper limit value is generated, and the position command data is used to drive the lens. Control to output the second lens control data input via the interface to the lens driving means as position command data when it is determined that the second lens operation unit is connected. Means,
A lens device comprising: The first lens operation unit includes an incremental encoder that outputs a number of pulse signals proportional to the amount of movement of the first operation member, and a counter that counts the pulse signals output from the incremental encoder, An absolute encoder that outputs a count value of a predetermined number of bits of the counter as the first lens control data or outputs the first lens control data in accordance with a movement amount of the first operation member; The lens apparatus according to claim 1. When it is determined that the first lens operation unit is connected, the control unit sequentially samples the previous position command data output to the lens driving unit and the first lens operation unit. When the first lens control data overflows, the difference between the first lens control data is obtained by adding the difference obtained in consideration of the overflow, and the added value is the predetermined value. 3. The lens apparatus according to claim 2, wherein an addition value limited so as not to exceed the lower limit value and the upper limit value is output to the lens driving means as current position command data. The first lens operation unit includes an incremental encoder that outputs, as the first lens control data, a number of pulse signals proportional to the amount of movement of the first operation member. If the lens operation unit is determined to be connected, the previous position command data output to the lens driving means and the incremental encoder output between the previous processing time and the current processing time. An added value obtained by adding the count value obtained by counting the pulse signal is obtained, and the added value obtained by limiting the added value so as not to exceed the predetermined lower limit value and the upper limit value is used as the current position command data as the lens driving means. The lens apparatus according to claim 1, wherein The discriminating unit receives type information input from the first or second lens operating unit via the interface or a switching signal input from a switching unit instructing switching of the first or second lens operating unit. 5. The lens apparatus according to claim 1, wherein which of the first and second lens operation units is connected is determined based on the determination result. In the lens operation unit that can be connected to the lens device,
An operation member with no limitation on the movement range;
Output means for outputting lens control data corresponding to the amount of movement of the operating member;
Based on the lens control data, the lower limit value or the upper limit value is limited so as not to exceed the predetermined lower limit value or the upper limit value, and the lower limit value or the upper limit value is maintained with respect to the movement of the operation member in the direction exceeding the lower limit value or the upper limit value. Generating position command data and outputting the position command data to the lens device;
A lens operation unit comprising: 6. Lens operation that can be connected to the first lens device that is the lens device according to claim 1 or the second lens device that outputs the input position command data to the lens driving means that drives the lens as it is. In the unit
An operation member with no limitation on the movement range;
Output means for outputting lens control data corresponding to the amount of movement of the operating member;
Determining means for determining which one of the first and second lens devices is connected;
When it is determined that it is connected to the first lens device, the lens control data is output to the first lens device, and when it is determined that it is connected to the second lens device, the lens A position that is restricted so as not to exceed a predetermined lower limit value or upper limit value based on the control data, and that the lower limit value or upper limit value is maintained with respect to movement of the operating member in a direction exceeding the lower limit value or upper limit value. Control means for generating command data and outputting the position command data to the second lens device;
A lens operation unit comprising: The output means includes an incremental encoder that outputs a number of pulse signals proportional to the amount of movement of the operation member, and a counter that counts the pulse signals output from the incremental encoder, and has a predetermined number of bits of the counter. 8. The lens operation unit according to claim 6, further comprising an absolute encoder that outputs a count value as the lens control data or outputs the lens control data in accordance with a movement amount of the operation member. When it is determined that the control means is connected to the second lens device, the previous position command data output to the second lens device and each lens control sampled sequentially from the output means. When the lens control data overflows, the difference between the data is obtained by adding the difference obtained in consideration of the overflow, and the added value does not exceed the predetermined lower limit and upper limit. 9. The lens operating unit according to claim 8, wherein the added value thus limited is output to the second lens device as current position command data. The output means includes an incremental encoder that outputs, as the lens control data, a number of pulse signals proportional to the amount of movement of the operation member, and the control means is determined to be connected to the second lens device. Then, the previous position command data output to the second lens device and a count value obtained by counting the pulse signals output from the incremental encoder between the previous processing time and the current processing time are obtained. An added value obtained is obtained, and an added value obtained by limiting the added value so as not to exceed the predetermined lower limit value and upper limit value is output to the second lens device as current position command data. The lens operation unit according to claim 7.

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