JPS6135681A - Image pickup device - Google Patents

Image pickup device

Info

Publication number
JPS6135681A
JPS6135681A JP15660284A JP15660284A JPS6135681A JP S6135681 A JPS6135681 A JP S6135681A JP 15660284 A JP15660284 A JP 15660284A JP 15660284 A JP15660284 A JP 15660284A JP S6135681 A JPS6135681 A JP S6135681A
Authority
JP
Japan
Prior art keywords
filter
amplifier
amplification
spectral
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15660284A
Other languages
Japanese (ja)
Inventor
Yoshimi Terajima
寺嶋 義美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15660284A priority Critical patent/JPS6135681A/en
Publication of JPS6135681A publication Critical patent/JPS6135681A/en
Pending legal-status Critical Current

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  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To attain automatic adjustment of filter characteristics and characteristics of a photoelectric converter by using an amplification factor adjusting signal to correct filter characteristics and variance in characteristic of the photoelectric converter so as to adjust the amplification factor of the amplifier. CONSTITUTION:When a spectrum function is caused for optional input light under the control of a filter control circuit, the amplified data after calibration to the spectrum function is read from a memory 8 under the control of the control circuit 10. The amplification factor data is converted into an amplification factor voltage by a D/A converter 9 and the result is fed to an amplifier 4. Thus, the photoelectric conversion output to the spectrum component is amplified by the amplifier 4, and the obtained output voltage is a signal correcting the variance of the spectrum transmitting luminous amount of the spectrum filter 1 and of the color sensitivity of the photoelectric converter 3. Thus the filter characteristic and the characteristic of the photoelectric converter are adjusted automatically.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は撮像装置、特に光電変換出力信号を増幅する増
幅器の増幅度のキャリブレーションを改善したカラース
キャナ装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an imaging device, and particularly to a color scanner device with improved calibration of the amplification degree of an amplifier that amplifies a photoelectric conversion output signal.

スキャナ装置には、カラースキャナ装置がある。Scanner devices include color scanner devices.

この種装置には分光フィルタ、光電変換器が必須のもの
として備えられている。これら素子は入力光の三原色成
分及びセック1コ成分に応答しなければならないが、そ
の応答度合は一般に、各成分によって異なる。従って、
再生時のカラーバランスが在るべき姿からずれてしまい
、これをそのままにしておけないことからそのずれを前
もって調整するのが一般的な技術的慣行となっている。
This type of device is equipped with a spectral filter and a photoelectric converter as essential items. These elements must respond to the primary and secondary color components of the input light, but the degree of response generally differs for each component. Therefore,
Since the color balance during reproduction deviates from the desired state and cannot be left as is, it is a common technical practice to adjust the deviation in advance.

〔従来の技術〕[Conventional technology]

従来における上述調整手段として、充電変換器の出力に
増幅器を接続し、成る入力光量に対し増幅器から所定の
出力電圧が発生するように増幅器の増幅度を調整して上
述ずれの発生を防止している(第2図参照)。
As the above-mentioned adjustment means in the past, an amplifier is connected to the output of the charging converter, and the amplification degree of the amplifier is adjusted so that a predetermined output voltage is generated from the amplifier for the input light amount, thereby preventing the above-mentioned deviation from occurring. (See Figure 2).

即ち、フィルタ制御回路aにより分光機能が制御される
フィルタbに入力された光はその光のうちフィルタの分
光機能に従った光成分だけが透過され、その透過された
光を受光する光電変換器Cの出力信号を増幅する増幅器
dの増幅度を可変抵抗器Rr+・・・RI4の調整によ
り調整している。
That is, of the light input to the filter b whose spectral function is controlled by the filter control circuit a, only the light component according to the spectral function of the filter is transmitted, and the photoelectric converter receives the transmitted light. The amplification degree of the amplifier d which amplifies the output signal of C is adjusted by adjusting the variable resistors Rr+...RI4.

この調整は選択されたフィルタ分光機能に対応するアナ
ログスイッチSW1 (iは1〜4)が閉成されて行な
われる。
This adjustment is performed by closing the analog switch SW1 (i is 1 to 4) corresponding to the selected filter spectroscopic function.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述のように各分光機能(R,B、G、モノクロ)毎に
対応する抵抗の調整を要する。これは入力光の各分光毎
にフィルタの分光透過光量、光電変換器の色感度のバラ
ツキの影響を排して再生時のカラーバランスを保つため
に必要となって来るものであり、その調整は専ら人手に
依存していた。
As mentioned above, it is necessary to adjust the resistance corresponding to each spectral function (R, B, G, monochrome). This is necessary in order to maintain color balance during reproduction by eliminating the influence of variations in the spectral transmitted light amount of the filter and the color sensitivity of the photoelectric converter for each spectral of input light, and its adjustment is necessary. It depended exclusively on manpower.

又、調整は工場出荷時に行なうため、環境変化、経年変
化による調整のずれに対してはフィールドで容易に調整
のやり直しが出来ないものであった。
Further, since the adjustment is made at the time of shipment from the factory, it is not possible to easily re-adjust in the field in case of deviations in adjustment due to environmental changes or aging.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は上述の問題点を解決するための撮像装置を提供
するもので、その手段は入力光を受けるフィルタと、該
フィルタの出力光を受ける光電変換器と、該光電変換器
の出力に接続された増幅器とを有して構成される撮像装
置において、前記増幅器を、制御端子に入力される増幅
度調整信号により増幅度が調整される増幅器とすると共
に”、増幅度調整信号を前記制御端子に供給する増幅度
調整信号供給手段とを備えて構成したもので葛る。
The present invention provides an imaging device for solving the above-mentioned problems, and the present invention includes a filter that receives input light, a photoelectric converter that receives output light of the filter, and a connection to the output of the photoelectric converter. In the imaging device, the amplifier is an amplifier whose amplification is adjusted by an amplification adjustment signal input to a control terminal, and the amplification adjustment signal is input to the control terminal. and an amplification degree adjustment signal supply means for supplying the signal to the amplifier.

〔作用〕[Effect]

本発明装置によれば、フィルタの光学的特性及び光電変
換器の光電特性の影響を、増幅度調整信号が供給されて
増幅度が調整される増幅器によって排し得るから、従来
のような人手による可変抵抗の調整は不要となり、フィ
ールドでの調整も容易に為し得る。
According to the device of the present invention, the influence of the optical characteristics of the filter and the photoelectric characteristics of the photoelectric converter can be eliminated by the amplifier to which the amplification degree adjustment signal is supplied and the amplification degree is adjusted. There is no need to adjust the variable resistance, and adjustments can be easily made in the field.

〔実施例〕・ 以下、添付図面を参照して本発明の詳細な説明する。〔Example〕· Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

第1図は本発明の一実施例を示す。この実施例はカラー
スキャナー装置の例である。この図において、1は分光
フィルタで、これはその分光機能がフィルタ制御回路2
によって切り換えられるようになっている。3は分光フ
ィルタを透過した光成分を受光する充電変換器である。
FIG. 1 shows an embodiment of the invention. This embodiment is an example of a color scanner device. In this figure, 1 is a spectral filter whose spectral function is controlled by the filter control circuit 2.
It can be switched by. 3 is a charging converter that receives the light component that has passed through the spectral filter.

充電変換器3の出力は増幅器4へ接続されている。この
増幅器4はその制御端子4Aに印加される増幅度調整信
号(電圧)によって増幅度が調整されるように構成され
たものである。
The output of the charging converter 3 is connected to an amplifier 4. This amplifier 4 is configured such that its amplification degree is adjusted by an amplification degree adjustment signal (voltage) applied to its control terminal 4A.

増幅器4の出力は誤差演算回路5の一方の入力に接続さ
れている。誤差演算回路5の他方の入力には、基準電圧
発生回路6の出力が接続されている。誤差演算回路5の
出力はアナログ−ディジタル変換回路7を介してメモリ
8へ接続されている。
The output of the amplifier 4 is connected to one input of the error calculation circuit 5. The other input of the error calculation circuit 5 is connected to the output of the reference voltage generation circuit 6. The output of the error calculation circuit 5 is connected to a memory 8 via an analog-digital conversion circuit 7.

メモリ8の出力はディジタル−アナログ変換回路9を介
して増幅器40制御端子4Aに接続されている。
The output of the memory 8 is connected to the amplifier 40 control terminal 4A via a digital-to-analog conversion circuit 9.

フィルタ制御回路2、アナログ−ディジタル変換回路7
、メモリ8、及びディジタル−アナログ変換回路9へ制
御回路10が接続されている。この制御回路】0は装置
のキャリブレーション時にフィルタ制御回路2をして分
光フィルタ1の分光機能の切換えを生じさせ、そのとき
の誤差演算回路5の出力電圧をアナログ−ディジタル変
換器7で変換してメモリ8の対応する箇所に格納し、そ
の後の稼動時に切り換えられる分光フィルタlの分光機
能毎に対応する内容をメモリ8から読み出し、ディジタ
ル−アナログ変換器9を介して増幅度調整制御電圧とし
て増幅器4へ供給する制御を行なうためのものである。
Filter control circuit 2, analog-digital conversion circuit 7
, a memory 8, and a digital-to-analog conversion circuit 9. This control circuit 0 causes the filter control circuit 2 to switch the spectral function of the spectral filter 1 during device calibration, and converts the output voltage of the error calculation circuit 5 at that time by the analog-digital converter 7. The content corresponding to each spectral function of the spectral filter l to be switched during subsequent operation is read out from the memory 8 and sent to the amplifier as an amplification adjustment control voltage via the digital-to-analog converter 9. This is for controlling the supply to 4.

このように構成される撮像装置の動作を以下に説明する
The operation of the imaging device configured in this way will be described below.

そのキャリブレーション時には、制御回路10はメモリ
8から所定の増幅度データを読み出してこれをディジタ
ル−アナログ変換器9で変換した増幅度制御電圧を増幅
器4に供給した状態において、フィルタ制御回路2を介
して任意の入力光が入力されている分光フィルタ1にキ
ャリブレーションするための特定の分光機能例えばR分
光部を生じさせつつそのR光成分を光電変換器3で光電
変換してその出力電圧を増幅器4で増幅する。その増幅
器出力電圧と基準電圧発生回路6からの基準電圧とを誤
差演算回路5で比較してその誤差を検出し、その値から
増幅器4の出力電圧が基準電圧になる増幅器の増幅度電
圧を演算発生する。その電圧を制御回路10の制御の下
にあるアナログ−ディジタル変換器7でディジタル値に
変換し、そのディジタル値をそのときの分光機能を識別
する格納箇所に格納する。
During the calibration, the control circuit 10 reads out predetermined amplification data from the memory 8 and converts it by the digital-to-analog converter 9 to supply the amplifier 4 with an amplification control voltage. A specific spectral function for calibrating the spectral filter 1 into which arbitrary input light is input is performed, for example, by generating an R spectral section, photoelectrically converting the R light component with the photoelectric converter 3, and converting the output voltage into the amplifier. Amplify with 4. The error calculation circuit 5 compares the output voltage of the amplifier with the reference voltage from the reference voltage generation circuit 6, detects the error, and calculates the amplification voltage of the amplifier whose output voltage of the amplifier 4 becomes the reference voltage from that value. Occur. The voltage is converted into a digital value by an analog-to-digital converter 7 under the control of the control circuit 10, and the digital value is stored in a storage location that identifies the current spectroscopic function.

このような格納処理を各分光機能毎に生ぜしめる。Such storage processing is generated for each spectroscopic function.

その終了後にカラースキャナー装置が稼動される場合に
、任意の入力光に対して成る分光機能がフィルタ制御回
路2の制御の下に生ぜしめられると、制御回路10の制
御の下にその分光機能に対応する、キャリブレーション
済の増幅度データがメモリ8から読め出され、ディジタ
ル−アナログ変換器9で増幅度電圧に変換されて増幅器
4に供給されるから、その分光成分に対する光電変換出
力信号が増幅器4で増幅されて得られる出力信号は分光
フィルタの分光透過光量や光電変換器の色感度のバラツ
キを補正した信号となっている。従って、その再生時の
カラーバランスは良好に保つことができる。
When the color scanner device is operated after the completion of the process, if a spectral function is generated for any input light under the control of the filter control circuit 2, the spectral function is generated under the control of the control circuit 10. Corresponding calibrated amplification data is read out from the memory 8, converted to an amplification voltage by the digital-to-analog converter 9, and supplied to the amplifier 4, so that the photoelectric conversion output signal for the spectral component is sent to the amplifier. The output signal obtained by amplification in step 4 is a signal corrected for variations in the amount of spectral transmitted light of the spectral filter and the color sensitivity of the photoelectric converter. Therefore, good color balance can be maintained during reproduction.

このような作用効果を得るのに何ら人手を要さず、又フ
ィールドでの調整を容易に為し得る。
No human effort is required to obtain such effects, and adjustments can be easily made in the field.

なお、上記実施例においては、メモリ8への増幅度デー
タの取得に増幅器4の出力を利用した例について説明し
たが、本発明の要旨は増幅度調整IJm信号によって増
幅器の増幅度を調整することにあるから、その意味にお
いて増幅度データの取得手段は第2義的意味を有するに
過ぎない。
In the above embodiment, an example was explained in which the output of the amplifier 4 was used to acquire the amplification data to the memory 8, but the gist of the present invention is to adjust the amplification of the amplifier using the amplification adjustment IJm signal. Therefore, in that sense, the amplification data acquisition means has only a secondary meaning.

〔発明の効果〕〔Effect of the invention〕

以上述べたように、本発明によれば、 ■フィルタの光学的特性、光電変換器の光電特性の自動
調整を可能にし、 ■その調整をフィールドでも容易に為し得る、等の効果
が得られる。
As described above, according to the present invention, the following effects can be obtained: (1) automatic adjustment of the optical characteristics of the filter and the photoelectric characteristics of the photoelectric converter is possible; and (2) the adjustment can be easily performed in the field. .

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す図、第2図は従来装置
の構成を示す図である。 図中、1は分光フィルタ、2はフィルタ制御回路、3は
光電変換器、4は増幅器、5は誤差演算回路、6は基準
電圧発生回路、7はアナログ−ディジタル変換回路、8
はメモリ、9はディジタルアナログ変換回路、10は制
御回路である。 第1図 第2図
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a conventional device. In the figure, 1 is a spectral filter, 2 is a filter control circuit, 3 is a photoelectric converter, 4 is an amplifier, 5 is an error calculation circuit, 6 is a reference voltage generation circuit, 7 is an analog-digital conversion circuit, 8
9 is a memory, 9 is a digital-to-analog conversion circuit, and 10 is a control circuit. Figure 1 Figure 2

Claims (3)

【特許請求の範囲】[Claims] (1)入力光を受けるフィルタと、該フィルタの出力光
を受ける光電変換器と、該光電変換器の出力に接続され
た増幅器とを有して構成された撮像装置において、前記
増幅器を、制御端子に入力される増幅度調整信号により
増幅度が調整される増幅器とすると共に、前記フィルタ
及び光電変換器の特性のバラツキを補正するための増幅
度調整信号を前記制御端子に供給する増幅度調整信号供
給手段とを備えて構成したことを特徴とする撮像装置。
(1) In an imaging device configured with a filter that receives input light, a photoelectric converter that receives output light of the filter, and an amplifier connected to the output of the photoelectric converter, the amplifier is controlled. An amplifier whose amplification degree is adjusted by an amplification degree adjustment signal inputted to a terminal, and an amplification degree adjustment supplying an amplification degree adjustment signal to the control terminal for correcting variations in characteristics of the filter and the photoelectric converter. An imaging device comprising: a signal supply means.
(2)前記フィルタは分光フィルタで、該分光フィルタ
は分光フィルタ制御手段によりその分光機能が切り換え
られるように構成され、前記増幅度調整信号供給手段は
増幅度調整データを格納するメモリと、該メモリの出力
に接続されたディジタル−アナログ変換器と、前記分光
フィルタ制御手段による分光フィルタの切換え制御と同
期して前記メモリからデータを読み出す制御手段とから
成り、前記ディジタル−アナログ変換器の出力は前記制
御端子に接続されていることを特徴とする特許請求の範
囲第1項記載の撮像装置
(2) The filter is a spectral filter, and the spectral filter is configured such that its spectral function can be switched by a spectral filter control means, and the amplification adjustment signal supply means includes a memory for storing amplification adjustment data, and a memory for storing amplification adjustment data. and control means for reading data from the memory in synchronization with the switching control of the spectral filter by the spectral filter control means, and the output of the digital-to-analog converter is connected to the output of the spectral filter. The imaging device according to claim 1, wherein the imaging device is connected to a control terminal.
(3)前記メモリのデータは前記制御端子に所定の増幅
度電圧が供給されている状態において、前記分光フィル
タに入力光を入力し且つ前記分光フィルタ制御手段によ
り前記分光フィルタに各分光機能を生じさせつつその分
光機能毎に前記増幅器から発生される出力電圧と基準電
圧とに応答して誤差演算回路から発生される出力電圧を
アナログ−ディジタル変換器で変換し、その出力を増幅
度調整データとして前記メモリに格納されたものである
ことを特徴とする特許請求の範囲第2項記載の撮像装置
(3) The data in the memory is stored in a state in which a predetermined amplification voltage is supplied to the control terminal, input light to the spectral filter, and cause each spectral function to be caused to the spectral filter by the spectral filter control means. The output voltage generated from the error calculation circuit is converted by an analog-digital converter in response to the output voltage generated from the amplifier and the reference voltage for each spectroscopic function, and the output is used as amplification adjustment data. The imaging device according to claim 2, wherein the imaging device is stored in the memory.
JP15660284A 1984-07-27 1984-07-27 Image pickup device Pending JPS6135681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15660284A JPS6135681A (en) 1984-07-27 1984-07-27 Image pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15660284A JPS6135681A (en) 1984-07-27 1984-07-27 Image pickup device

Publications (1)

Publication Number Publication Date
JPS6135681A true JPS6135681A (en) 1986-02-20

Family

ID=15631327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15660284A Pending JPS6135681A (en) 1984-07-27 1984-07-27 Image pickup device

Country Status (1)

Country Link
JP (1) JPS6135681A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996041218A1 (en) * 1995-06-07 1996-12-19 Masimo Corporation Optical filter for spectroscopic measurement and method of producing the optical filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996041218A1 (en) * 1995-06-07 1996-12-19 Masimo Corporation Optical filter for spectroscopic measurement and method of producing the optical filter
US5760910A (en) * 1995-06-07 1998-06-02 Masimo Corporation Optical filter for spectroscopic measurement and method of producing the optical filter
AU706049B2 (en) * 1995-06-07 1999-06-10 Masimo Laboratories, Inc. Optical filter for spectroscopic measurement and method of producing the optical filter
US5940182A (en) * 1995-06-07 1999-08-17 Masimo Corporation Optical filter for spectroscopic measurement and method of producing the optical filter
US6278522B1 (en) 1995-06-07 2001-08-21 Masimo Laboratories Optical filter for spectroscopic measurement and method of producing the optical filter

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