JPS6039860Y2 - digital densitometer - Google Patents
digital densitometerInfo
- Publication number
- JPS6039860Y2 JPS6039860Y2 JP1975026808U JP2680875U JPS6039860Y2 JP S6039860 Y2 JPS6039860 Y2 JP S6039860Y2 JP 1975026808 U JP1975026808 U JP 1975026808U JP 2680875 U JP2680875 U JP 2680875U JP S6039860 Y2 JPS6039860 Y2 JP S6039860Y2
- Authority
- JP
- Japan
- Prior art keywords
- zero
- density
- switch
- voltage
- digital
- 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.)
- Expired
Links
Landscapes
- Control Of Exposure In Printing And Copying (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【考案の詳細な説明】 この考案は、デジタル濃度計に関する。[Detailed explanation of the idea] This invention relates to a digital densitometer.
近年濃度計は、測定値の読み易さ測定者誤差の防止等か
らデジタル表示機構を具備した機種が市場に出ている。In recent years, densitometer models equipped with digital display mechanisms have appeared on the market in order to make it easier to read measured values and to prevent operator errors.
これらの機種は、従来の光電変換信号をデジタル変換し
表示している。These models convert conventional photoelectric conversion signals into digital signals and display them.
すなわち、測定者が測定物の濃度測定前に行う零濃度補
正に、従来同様透過濃度計では測定部に測定物を挿入せ
ずに、また反射濃度計にあっては濃度０．０５−０．１
歴度の濃度と具備した基準板を測定部に挿入し、測定値
表示が透過濃度計においては零に、反射濃度計において
は基準板の濃度値になるようにボリューム調整を行って
いた。In other words, the zero density correction performed by the measurer before measuring the concentration of the object to be measured can be performed without inserting the object into the measuring section in the conventional transmission densitometer, and in the case of the reflection densitometer, the zero density correction is performed before measuring the concentration of the object. 1
A reference plate equipped with the density of the history was inserted into the measurement unit, and the volume was adjusted so that the measured value display was zero in the transmission densitometer and the density value of the reference plate in the reflection densitometer.
零濃度補正作業は、とくにカラー濃度測定機種にもいて
は各フィルタ毎に行わねばならす、測定者にとって非常
に煩しく時間の要する作業であった。The zero-density correction work must be performed for each filter, especially in color density measurement models, and is a very troublesome and time-consuming work for the measurer.
そして、現存の濃度計は、かような欠点を未だに保有し
ている。Existing densitometers still have these drawbacks.
この考案は、測定者の零濃度補正作業として従来のよう
に煩わしいボリューム調整を行なわなくてすむ零濃度補
正作業を容易ならしめたデジタル濃度計を提供すること
を目的とするものであって、その具体的な構成は、測定
物から透過光または反射光を受ける光電変換部、該光電
変換部の出力電圧をデジタル信号に変換するＡＤ変換部
を含む電気回路によって光量をデジタル変換するデジタ
ル濃度計において、該心変換部の無補正のままの濃度の
デジタル信号を受けて零濃度補正情報を記憶する零濃度
記憶部、該零濃度記憶部の出力に接続された第１スイツ
チ、第２スイツチを有する基準板濃度電圧発生部わよひ
該第１、第２スイツチの開閉を制御するスイッチ制御部
を付加し、該零濃度記憶部に記憶された零濃度補正電圧
、または該零濃度記憶部に記憶された零濃度補正電圧お
よび該基準板濃度電圧発生部の予め基準板濃度値に対応
した電圧を、該第１スイツチ、または該第１および第２
スイツチを介して該電気回路に送るようにして成ること
を特徴とするデジタル濃度計である。The purpose of this invention is to provide a digital densitometer that facilitates zero-density correction work by eliminating the need for troublesome volume adjustments as in the past. The specific configuration is a digital densitometer that digitally converts the amount of light by an electric circuit including a photoelectric conversion section that receives transmitted light or reflected light from a measurement object, and an AD conversion section that converts the output voltage of the photoelectric conversion section into a digital signal. , a zero concentration storage section that receives the uncorrected concentration digital signal of the heart conversion section and stores zero concentration correction information, and a first switch and a second switch connected to the output of the zero concentration storage section. A reference plate concentration voltage generation section is added with a switch control section that controls opening and closing of the first and second switches, and the zero concentration correction voltage stored in the zero concentration storage section or the zero concentration correction voltage stored in the zero concentration storage section is added. The zero density correction voltage and the voltage corresponding to the reference plate density value of the reference plate density voltage generator are applied to the first switch or the first and second switches.
This is a digital densitometer characterized in that the concentration is sent to the electric circuit via a switch.
以下図面に基づきこの考案に係る一実施例を説明する。An embodiment of this invention will be described below based on the drawings.
測定物からの透過光または反射光１は光電変換部２によ
って電圧変換され、透過濃度計では該電圧とＤＡ変換部
６からの零濃度補正電圧とまた反射濃度計ではアッテネ
ータ９によって基準板濃度電圧発生部８から発生する予
め基準板濃度値に対応した電圧に設定された電圧とが共
に演算部１３によって加算されＡＤ変換部３においてデ
ジタル信号１５を発生させ、該デジタル信号１５を測定
物の濃度値としてデジタル表示部５に表示する。The transmitted light or reflected light 1 from the object to be measured is converted into a voltage by the photoelectric converter 2, and in the transmission densitometer, this voltage is converted into a zero concentration correction voltage from the DA converter 6, and in the reflection densitometer, the reference plate concentration voltage is converted by the attenuator 9. The calculation unit 13 adds together the voltage generated from the generation unit 8 and set in advance to a voltage corresponding to the reference plate concentration value, and the AD conversion unit 3 generates a digital signal 15. It is displayed on the digital display section 5 as a value.
この際、スイッチ１０は、導通状態でありそして、スイ
ッチ１１および１２のいずれか一方が零濃度補正記憶部
４からの補正極性信号１８を入力信号として働くスイッ
チ制御部７に従って働き導通している。At this time, the switch 10 is in a conductive state, and either one of the switches 11 and 12 operates in accordance with the switch control section 7 which receives the correction polarity signal 18 from the zero density correction storage section 4 as an input signal.
なお、１４はインバータ、２０はアンドゲート、２１は
タイマ、２３はフィルタ検出部である。Note that 14 is an inverter, 20 is an AND gate, 21 is a timer, and 23 is a filter detection section.
次に零濃度補正時の動作について説明する。Next, the operation during zero density correction will be explained.
測定者は、前述の如き規定の測定状態に濃度計の測定部
を設定した後にスイッチ２２を押す。The measurer presses the switch 22 after setting the measuring section of the densitometer to the prescribed measurement state as described above.
操作スイッチ２２からの信号でタイマ２１は、測定物か
らの透過光または反射光１がデジタル濃度化されるに十
分な時間幅を持つパルス信号２４をスイッチｑ、＋＋御
部７Ｊ５よひアンド・ケート２０に送る。In response to the signal from the operation switch 22, the timer 21 sends a pulse signal 24 having a time width sufficient to convert the transmitted light or reflected light 1 from the measurement object into digital concentration. Send to 20.
スイッチ制ｉ卸部７は、該パルス信号２４の発生してい
る間スイッチ１０，１１．１２を切断状態にする。The switch control unit 7 turns off the switches 10, 11, and 12 while the pulse signal 24 is generated.
このため濃度のデジタル信号１５は、無補正のま）零濃
度補正記憶部４に送る。Therefore, the density digital signal 15 is sent to the zero density correction storage section 4 without any correction.
零濃度記憶部４の情報書込みは、アンド・ケート２０で
制御され紛変換部３からの書込み命令１６およびタイマ
２１からのパルス信号２４とが同時に発生しているとき
に行われ、その結果濃度のデジタル信号１５および補正
極性信号１７の両信号を書込む。Information writing to the zero concentration storage section 4 is controlled by the AND gate 20, and is performed when the write command 16 from the error conversion section 3 and the pulse signal 24 from the timer 21 are generated simultaneously, and as a result, the concentration is Both the digital signal 15 and the corrected polarity signal 17 are written.
カラー濃度計の場合には、各フィルタ毎に零濃度補正記
憶部を設けておき、フィルタ検出部２３からの信号に従
い選択する。In the case of a color densitometer, a zero density correction storage section is provided for each filter, and selection is made according to a signal from the filter detection section 23.
タイマ２１のパルス発生は数ＩＱｍｓｅｃで終了する。Pulse generation by the timer 21 ends in several IQ msec.
そして、パルス発生終了後、回路は、通常状態に戻り、
零濃度補正記憶部４に記憶された零濃度補正デジタル情
報１９がＤＡ変換部６に入ってアナログ電圧化され演算
部１３に送る。After the pulse generation ends, the circuit returns to its normal state.
The zero density correction digital information 19 stored in the zero density correction storage unit 4 enters the DA converter 6, converts it into an analog voltage, and sends it to the calculation unit 13.
また、反射濃度計の場合には、再び基準板濃度電圧発生
部８から予め設定した電圧を演算部１３に送る。Further, in the case of a reflection densitometer, a preset voltage is sent from the reference plate concentration voltage generating section 8 to the calculating section 13 again.
なお、上記実施例では、零濃度補正をＡＤ変換部の出力
を光電変換部の次段の演算部にフィードバックして行っ
たがこれを光電変換部内にまでフィードバックすること
またＡＤ変換部の次段でデジタル演算を行うことも可能
である。In the above embodiment, the zero density correction was performed by feeding back the output of the AD conversion section to the calculation section at the next stage of the photoelectric conversion section. It is also possible to perform digital calculations.
この考案は、上記の如くデジタル濃度計における零濃度
補正作業として透過濃度計にあっては、零濃度補正が電
気回路に設けた操作スイッチを操作するだけで処理され
るので測定者の操作を容易にし、また反射濃度計にあっ
ても同様な操作で基準濃度板の濃度値に補正できる利点
があり特にこの利点はカラー濃度計のように白黒、ブル
ー、グリーン、レッドの各フィルタ毎に４回操作を行わ
ねばならない場合に、きわめて顕著な効果となった。This invention, as mentioned above, can be used to correct the zero concentration in a digital densitometer, but in the case of a transmission densitometer, the zero concentration correction can be performed simply by operating the operation switch installed in the electric circuit, making it easier for the operator to operate. In addition, even with a reflection densitometer, it has the advantage of being able to correct the density value of the reference density plate using the same operation, and this is especially advantageous as it can be corrected four times for each of the black and white, blue, green, and red filters like a color densitometer. This was a very noticeable effect when operations had to be performed.
図面はこの考案に係る回路図である。
２・・・・・・光電変換部、３・・・・・・ＡＤ変換部
、４・・・・・・零濃度補正記憶部、５・・・・・・表
示部、６・・・・・・ＤＡ変換部、１３・・・・・・演
算部、２２・・・・・・操作スイッチ。The drawing is a circuit diagram according to this invention. 2...Photoelectric conversion unit, 3...AD conversion unit, 4...Zero density correction storage unit, 5...Display unit, 6... ...DA converter, 13... calculation section, 22... operation switch.
Claims (1)
該光電変換部の出力電圧をデジタル信号に変換する叩変
換部を含む電気回路によって光量をデジタル変換するデ
ジタル濃度計において、該叩変換部の無補正のままの濃
度のデジタル信号を受けて零濃度補正情報を記憶する零
濃度記憶部、該零濃度記憶部の出力に接続された第１ス
イツチ、第２スイツチを有する基準板濃度電圧発生部お
よび該１、第２スイツチの開閉を制御するス、インチ制
御部を付加し、該零濃度記憶部に記憶された零濃度補正
電圧、または該零濃度記憶部に記憶された零濃度補正電
圧および該基準板濃度電圧発生部の予め基準板濃度値に
対応した電圧を、該第１スイツチ、または該第１および
第２スイツチを介して該電気回路に送るようにして成る
ことを特徴とするデジタル濃度計。a photoelectric conversion unit that receives transmitted light or reflected light from the measurement object;
In a digital densitometer that digitally converts the amount of light by an electric circuit including a conversion section that converts the output voltage of the photoelectric conversion section into a digital signal, zero concentration is determined by receiving the digital signal of the uncorrected density from the conversion section. a zero density storage unit that stores correction information; a reference plate density voltage generation unit that has a first switch and a second switch connected to the output of the zero density storage unit; and a switch that controls opening and closing of the first and second switches; An inch control unit is added, and the zero density correction voltage stored in the zero density storage unit, or the zero density correction voltage stored in the zero density storage unit and the reference plate density value of the reference plate density voltage generation unit is adjusted in advance. A digital densitometer characterized in that a corresponding voltage is sent to the electrical circuit via the first switch or the first and second switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975026808U JPS6039860Y2 (en) | 1975-02-27 | 1975-02-27 | digital densitometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975026808U JPS6039860Y2 (en) | 1975-02-27 | 1975-02-27 | digital densitometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51108678U JPS51108678U (en) | 1976-08-31 |
| JPS6039860Y2 true JPS6039860Y2 (en) | 1985-11-29 |
Family
ID=28127741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1975026808U Expired JPS6039860Y2 (en) | 1975-02-27 | 1975-02-27 | digital densitometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6039860Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US419333A (en) * | 1890-01-14 | Cultivator and cotton-chopper | ||
| JPS4924312A (en) * | 1972-06-26 | 1974-03-04 |
-
1975
- 1975-02-27 JP JP1975026808U patent/JPS6039860Y2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US419333A (en) * | 1890-01-14 | Cultivator and cotton-chopper | ||
| JPS4924312A (en) * | 1972-06-26 | 1974-03-04 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51108678U (en) | 1976-08-31 |
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