JPH06250480A - Toner adhesive quantity measuring instrument for transfer type color printer - Google Patents
Toner adhesive quantity measuring instrument for transfer type color printerInfo
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- JPH06250480A JPH06250480A JP5059328A JP5932893A JPH06250480A JP H06250480 A JPH06250480 A JP H06250480A JP 5059328 A JP5059328 A JP 5059328A JP 5932893 A JP5932893 A JP 5932893A JP H06250480 A JPH06250480 A JP H06250480A
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- Prior art keywords
- light
- toner
- reflected
- light receiving
- projecting
- Prior art date
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- Dry Development In Electrophotography (AREA)
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- Color Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、カラ−用トナ−の付
着量を測定する装置で、例えば、転写形カラ−プリンタ
を備えたコピ−やファックスなどにおけるトナ−の付着
量を測定するのに利用されるカラ−用トナ−の付着量測
定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an apparatus for measuring the amount of toner adhering to a color, for example, to measure the amount of toner adhering to a copy or a fax machine equipped with a transfer type color printer. The present invention relates to a device for measuring the adhered amount of a toner for a color, which is used in the above.
【０００２】[0002]
【従来の技術】図６は従来のカラ−用トナ−の付着量測
定装置で、１は測定光を投光するＬＥＤ等の光源、２は
フォト・ダイオ−ドなどの受光器である。３は金属製材
料の回転ドラムで、この回転ドラム３は表面にシリコ
ン、セレン等の感光体４を備えている。感光体４の表面
にはコピ−用紙にカラ−文字等を転写するのに必要な黄
色、マゼンタ、シアンの各色を有するカラ−用トナ−５
が帯電によって付着している。2. Description of the Related Art FIG. 6 shows a conventional toner adhesion amount measuring device for color toners, 1 is a light source such as an LED for projecting measurement light, and 2 is a photodetector such as a photo diode. Reference numeral 3 is a rotary drum made of a metallic material, and the rotary drum 3 is provided with a photosensitive member 4 such as silicon or selenium on its surface. On the surface of the photoconductor 4, a color toner 5 having each color of yellow, magenta, and cyan necessary for transferring a color character or the like onto a copy sheet.
Are attached due to electrification.
【０００３】光源１からトナ−５に対し測定光を投光す
ると、図６中における光Ｌ1はトナ−５によって反射さ
れる光Ｌ2と回転ドラム３の表面によって反射される光
Ｌ3となって受光器２に入射する。そして、受光器２は
これら２つの光Ｌ2、Ｌ3を受光して受光信号を出力す
る。When the measuring light is projected from the light source 1 to the toner 5, the light L 1 in FIG. 6 is the light L 2 reflected by the toner 5 and the light L 3 reflected by the surface of the rotary drum 3. And enters the light receiver 2. Then, the light receiver 2 receives these two lights L 2 and L 3 and outputs a light reception signal.
【０００４】トナ−５の付着量が多い場合、反射光Ｌ3
がトナ−５によって遮光されるので受光器２の受光量が
減少し、トナ−５の付着量が少ない場合、上記とは逆に
反射光Ｌ3が多くなるので受光器２の受光量が増大す
る。この結果、受光器２の受光信号より感光体４に付着
しているトナ−量を測定することができる。When a large amount of toner 5 adheres, the reflected light L 3
Is blocked by the toner 5, the amount of light received by the light receiver 2 decreases, and when the amount of toner 5 attached is small, the amount of reflected light L 3 increases, which is contrary to the above. To do. As a result, the amount of toner attached to the photoconductor 4 can be measured from the light reception signal of the light receiver 2.
【０００５】一方、光源からの投光光Ｌ1を図７に示す
ように感光体４に対する法線方向として、トナ−５によ
って乱反射する光の一部を上記と同様にトナ−５からの
反射光Ｌ2とし、この反射光Ｌ2を受光器２によって受光
してトナ−量を測定することもできる。On the other hand, the projected light L 1 from the light source is set as the normal direction to the photosensitive member 4 as shown in FIG. 7, and a part of the light diffusely reflected by the toner 5 is reflected from the toner 5 in the same manner as above. a light L 2, toner of the reflected light L 2 and received by the light receiver 2 - can also be measured amount.
【０００６】[0006]
【発明が解決しようとする課題】上記した測定装置で測
定したトナ−５の測定量は前者の場合が図８に示す測定
曲線となり、後者の場合が図９に示す測定曲線となる。
つまり、前者の場合は、トナ−５による反射光Ｌ2と回
転ドラム３の表面による反射光Ｌ3とによってトナ−量
を測定しているため、トナ−が所定の付着量となるまで
は受光器２の受光量が減少し、その受光量から測定する
ことができるが、トナ−５の付着量が多くなるとトナ−
５による反射光Ｌ2が増加して受光器２が飽和状態とな
り、受光量が上昇して測定することができないことにな
る。図８におけるＰ点はその分岐点である。The measured amount of the toner-5 measured by the above-described measuring device is the measurement curve shown in FIG. 8 in the former case and the measurement curve shown in FIG. 9 in the latter case.
That is, in the former case, the toner by the reflected light L 3 by the surface of the reflected light L 2 and the rotary drum 3 by toner -5 - because it measures the amount of toner - until it becomes a predetermined deposition amount received The amount of light received by the device 2 decreases, and the amount of light received can be measured. However, if the amount of toner 5 attached increases, the toner will increase.
The reflected light L 2 due to 5 increases and the photodetector 2 becomes saturated, and the amount of received light rises, making it impossible to perform measurement. Point P in FIG. 8 is the branch point.
【０００７】一方、後者の場合は、トナ−５によって乱
反射する光をとらえてトナ−量を測定しているため、ト
ナ−５の付着量が多くなると、やはり、受光器２が飽和
状態となり測定値の変化率が小さくなってしまう。した
がって、上記したいずれの測定装置の場合も正確な測定
量を得ることができない。On the other hand, in the latter case, since the amount of toner is measured by catching the light diffusely reflected by the toner 5, when the amount of toner 5 adhered increases, the photodetector 2 is also saturated and measured. The rate of change of the value becomes small. Therefore, in the case of any of the above measuring devices, it is not possible to obtain an accurate measured amount.
【０００８】そこで、本発明は、トナ−の付着量を正確
に測定することができるカラ−用トナ−の付着量測定装
置を開発することを目的とする。[0008] Therefore, an object of the present invention is to develop a toner adhesion amount measuring device for a color toner which can accurately measure the adhesion amount of the toner.
【０００９】[0009]
【課題を解決するための手段】上記した目的を達成する
ため、本発明では、感光ドラムに付着した誘電体である
カラ−用トナ−に単一偏光光を投光する投光手段と、上
記トナ−への投光によって反射する光のうち投光手段と
同一の偏光光を選択して受光する第１の受光手段と、上
記トナ−への投光によって反射する光のうち投光手段と
異なる偏光光を選択して受光する第２の受光手段と、第
１、第２の受光手段の受光出力にもとづく信号差に応じ
てトナ−付着情報を出力する信号処理手段とを備えて構
成したことを特徴とする転写形カラ−プリンタのトナ−
付着量測定装置を提案する。In order to achieve the above-mentioned object, in the present invention, a light-projecting means for projecting a single-polarized light onto a color toner which is a dielectric adhered to a photosensitive drum, and A first light receiving means for selecting and receiving the same polarized light as the light projecting means among the light reflected by the light projected onto the toner, and a light projecting means among the light reflected by the light projected onto the toner. The second light receiving means for selecting different polarized light and receiving the light and the signal processing means for outputting the toner adhesion information according to the signal difference based on the light receiving outputs of the first and second light receiving means are configured. Toner of transfer type color printer characterized by
A deposition amount measuring device is proposed.
【００１０】[0010]
【作用】感光ドラムに付着しているカラ−用トナ−に対
し投光手段から単一の偏光光を投光すると、この投光光
の一部がトナ−の表面によって反射し、残りがトナ−を
透過して感光ドラムによって反射する。また、トナ−に
よって反射される光はトナ−が誘電体であることから投
光手段とは異なる偏光光を含んでいる。When a single polarized light is projected from the light projecting means to the color toner attached to the photosensitive drum, a part of the projected light is reflected by the surface of the toner, and the rest is the toner. -Is transmitted and reflected by the photosensitive drum. The light reflected by the toner contains polarized light different from that of the light projecting means because the toner is a dielectric.
【００１１】これら反射光のうち、第１の受光手段が投
光手段から投光される偏光光と同一の偏光光を選択して
受光する。つまり、トナ−からの反射光のうちの投光手
段と同一偏光の光と感光ドラムからの反射光を受光す
る。また、第２の受光手段が投光手段から投光される偏
光光と異なる偏光光を選択して受光する。つまり、トナ
−からの反射光のうちの投光手段と異なる偏光の光のみ
を受光する。Of these reflected lights, the first light receiving means selects and receives the same polarized light as the polarized light projected from the light projecting means. That is, of the reflected light from the toner, the light having the same polarization as the light projecting means and the reflected light from the photosensitive drum are received. The second light receiving means selects and receives polarized light different from the polarized light projected from the light projecting means. That is, of the reflected light from the toner, only the light having a polarization different from that of the light projecting means is received.
【００１２】第１、第２の受光手段で受光したトナ−か
らの反射光は互いに比例関係にあり、第２の受光手段の
受光出力に一定係数を乗じることにより第１の受光手段
におけるトナ−からの反射光を算出できる。第１の受光
手段の受光出力から第２の受光手段の受光出力に一定係
数を乗じた値を引くと感光ドラムからの反射光の受光出
力となる。The reflected light from the toner received by the first and second light receiving means is in a proportional relationship with each other, and the light receiving output of the second light receiving means is multiplied by a constant coefficient to obtain the toner in the first light receiving means. The reflected light from can be calculated. Subtracting a value obtained by multiplying the light receiving output of the second light receiving means by the constant coefficient from the light receiving output of the first light receiving means gives the light receiving output of the reflected light from the photosensitive drum.
【００１３】感光ドラムからの反射光はトナ−の反射光
以外の光であり、トナ−の付着量が多いと減光し、トナ
−の付着量が少ないと増光する。これより、感光ドラム
の反射光からトナ−の付着量を測定することができる。
上記した演算処理は、第１、第２の受光手段からの受光
出力をもとに信号処理手段によって行なわれる。The reflected light from the photosensitive drum is light other than the reflected light of the toner. When the toner adhesion amount is large, the light is dimmed, and when the toner adhesion amount is small, the light is increased. From this, the amount of toner adhering can be measured from the reflected light of the photosensitive drum.
The above-mentioned arithmetic processing is performed by the signal processing means based on the light reception outputs from the first and second light receiving means.
【００１４】[0014]
【実施例】次に、本発明の実施例について図面に沿って
説明する。図１及び図２は本発明の第１実施例を示し、
図１は付着量測定装置の簡略的な斜視図であり、図２は
同装置の簡略的な部分図である。Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention,
FIG. 1 is a schematic perspective view of an adhesion amount measuring device, and FIG. 2 is a schematic partial view of the same device.
【００１５】金属製の回転ドラム５０ａをセレン、アモ
ルファスシリコン等の感光体５０ｂで表装した感光ドラ
ム５０の表面には転写するためのカラ−用トナ−５１が
付着している。このトナ−５１は誘電体で帯電により付
着する。A color toner toner 51 for transfer is attached to the surface of the photosensitive drum 50 in which the metal rotary drum 50a is mounted on the photosensitive member 50b such as selenium or amorphous silicon. The toner 51 is a dielectric substance and is attached by charging.
【００１６】感光ドラム５０の表面に測定光を投光する
投光手段と、投光手段の投光によって反射する光を受光
する２つの受光手段とが設けられている。投光手段は、
ＬＥＤなどの光源５２とＰ偏光の光を透過させる偏光フ
ィルタ５３とから構成されている。The surface of the photosensitive drum 50 is provided with a light projecting means for projecting measuring light and two light receiving means for receiving light reflected by the light projected by the light projecting means. The projecting means is
It is composed of a light source 52 such as an LED and a polarization filter 53 that transmits P-polarized light.
【００１７】また、２つの受光手段のうち第１の受光手
段は受光素子５４とＰ偏光の光を透過させる偏光フィル
タ５５とから構成され、第２の受光手段は受光素子５６
とＳ偏光の光を透過させる偏光フィルタ５７とから構成
されている。なお、上記した第２の受光手段は、感光ド
ラム５０の法線方向からの入射光を受光するように受光
素子５６と偏光フィルタ５７とが配置されている。Of the two light receiving means, the first light receiving means is composed of a light receiving element 54 and a polarization filter 55 which transmits P-polarized light, and the second light receiving means is a light receiving element 56.
And a polarization filter 57 that transmits S-polarized light. In the second light receiving means described above, the light receiving element 56 and the polarization filter 57 are arranged so as to receive the incident light from the direction normal to the photosensitive drum 50.
【００１８】光源５２から感光ドラム５０に付着したト
ナ−５１に測定光を投光すると、Ｐ偏光の光Ｐ1と、Ｓ
偏光の光Ｓ1とを含んだ測定光はＰ偏光フィルタ５３を
通過することにより、光Ｓ1がカットされ、光Ｐ1のみが
トナ−５１に投光される。When the measuring light is projected from the light source 52 to the toner 51 attached to the photosensitive drum 50, the P-polarized light P 1 and S
Measuring light containing a light S 1 of polarization by passing through the P-polarized light filter 53, the light S 1 is being cut, only light P 1 is projected to toner -51.
【００１９】トナ−５１の入射光Ｐ1は、誘電体である
トナ−５１の表面で一部が反射し、一部がトナ−５１を
透過する。トナ−５１を透過した光はさらに感光体５０
ｂの表面でその一部が反射し、一部が感光体５０ｂを透
過する。そして、感光体５０ｂを透過した光は回転ドラ
ム５０ａの表面で全て反射する。The incident light P 1 of the toner 51 is partially reflected by the surface of the toner 51, which is a dielectric, and partially transmitted through the toner 51. The light transmitted through the toner 51 is further transferred to the photoconductor 50.
Part of the light is reflected on the surface of b and part of the light is transmitted through the photoconductor 50b. Then, all the light transmitted through the photoconductor 50b is reflected on the surface of the rotary drum 50a.
【００２０】上記した各々の反射光は、トナ−５１の表
面で反射した光が、誘電体であるトナ−５１によって偏
光が乱され、Ｐ偏光の光とＳ偏光の光とを含むようにな
り、また、感光体５０ｂの表面で反射した光は、感光体
５０ｂが光の入射時に導通性をもち非誘電体となること
から偏光は乱されることなくＰ偏光の光となる。また、
回転ドラム５０ａの表面で反射した光は、回転ドラム５
０ａが金属製であることから非誘電体であり偏光は乱さ
れることなくＰ偏光の光となる。Each of the above-mentioned reflected lights is the light reflected on the surface of the toner 51, the polarization of which is disturbed by the toner 51, which is a dielectric material, so that it includes P-polarized light and S-polarized light. Further, the light reflected on the surface of the photoconductor 50b becomes P-polarized light without being disturbed in polarization because the photoconductor 50b becomes conductive and becomes a non-dielectric when light enters. Also,
The light reflected on the surface of the rotating drum 50a is transmitted to the rotating drum 5
Since 0a is made of metal, it is a non-dielectric material and the polarized light is P-polarized light without being disturbed.
【００２１】第１の受光手段として備えた受光素子５４
に向かう光は、図２に示す如く、トナ−５１の表面で反
射したＰ偏光の光Ｐ2とＳ偏光の光Ｓ2、感光体５０ｂの
表面で反射したＰ偏光の光Ｐ3及び回転ドラム５０ａの
表面で反射したＰ偏光の光Ｐ4となる。そして、これら
の光の中からＰ偏光フィルタ５５によってＳ偏光の光Ｓ
2がカットされ、受光素子５４に入射する光はＰ偏光の
光Ｐ2、Ｐ3、Ｐ4となる。Light receiving element 54 provided as the first light receiving means.
Light directed to, as shown in FIG. 2, the light P 2 and the light S 2 of S-polarized light of P-polarized light reflected by the surface of the toner -51, light P 3 and rotary drum of P-polarized light reflected by the surface of the photosensitive member 50b It becomes the P-polarized light P 4 reflected on the surface of 50a. Then, among these lights, the S-polarized light S is obtained by the P-polarization filter 55.
2 is cut, and the light incident on the light receiving element 54 becomes P-polarized light P 2 , P 3 , and P 4 .
【００２２】一方、第２の受光手段として備えた受光素
子５６に向かう光は、この受光素子５６が感光体５０ｂ
の法線方向に備えられていることから、トナ−５１によ
って反射されたＰ偏光の光Ｐ5とＳ偏光の光Ｓ3となる
が、感光体５０ｂの表面状態によっては、この感光体５
０ｂの表面からの反射光にＰ偏光の光Ｐ6が含まれる。
そして、これらの光の中からＳ偏光フィルタ５７によっ
てＰ偏光の光Ｐ5、Ｐ6がカットされ、受光素子５６の入
射する光はＳ偏光の光Ｓ3だけとなる。On the other hand, the light traveling toward the light receiving element 56 provided as the second light receiving means is received by the light receiving element 56.
Since it is provided in the direction of the normal line, the P-polarized light P 5 and the S-polarized light S 3 are reflected by the toner 51. However, depending on the surface state of the photoconductor 50b, the photoconductor 5b
The P-polarized light P 6 is included in the reflected light from the surface of 0b.
Then, of these lights, the S-polarized light 57 cuts the P-polarized lights P 5 and P 6 , and the light incident on the light receiving element 56 is only the S-polarized light S 3 .
【００２３】ここで、受光素子５４の受光する光Ｐ2、
Ｐ3、Ｐ4のうち、光Ｐ3、Ｐ4はトナ−５１によって遮光
された光であるから、これらの光Ｐ3、Ｐ4はトナ−５１
の付着量によって変化する。つまり、トナ−５１の付着
量が多い時は、光Ｐ3、Ｐ4は減少し、トナ−５１の付着
量が少ない時は、光Ｐ3、Ｐ4は増加する。そこで、光Ｐ
3、Ｐ4を計測することにより、トナ−５１の付着量を知
ることができる。Here, the light P 2 received by the light receiving element 54,
Of P 3, P 4, because the light P 3, P 4 is the light that is blocked by the toner -51, these light P 3, P 4 is toner -51
It changes according to the attached amount of. That is, when the amount of toner 51 adhered is large, the lights P 3 and P 4 decrease, and when the amount of toner 51 adhered is small, the lights P 3 and P 4 increase. Therefore, the light P
By measuring 3 and P 4 , the adhesion amount of the toner 51 can be known.
【００２４】上記した受光素子５４の受光する光Ｐ2、
Ｐ3、Ｐ4のうち、光Ｐ2はトナ−５１によって反射した
光であり、受光素子５６の受光するトナ−５１によって
反射した光Ｓ3と比例関係にある。したがって、受光素
子５６の出力信号に一定係数Ｋを乗じることにより、光
Ｐ2と近似な値を求めることができる。The light P 2 received by the light receiving element 54,
Of P 3 and P 4 , the light P 2 is the light reflected by the toner 51, and is proportional to the light S 3 reflected by the toner 51 received by the light receiving element 56. Therefore, by multiplying the output signal of the light receiving element 56 by the constant coefficient K, a value approximate to the light P 2 can be obtained.
【００２５】この結果、受光素子５４の出力信号から受
光素子５６の出力信号に一定係数Ｋを乗じた値を引くこ
とにより光Ｐ3、Ｐ4が求められる。つまり、トナ−５１
の付着量をＴ、受光素子５４の出力信号をａ、受光素子
５６の出力信号をｂとすると、Ｔ∝ａ−Ｋｂとなる。As a result, the light P 3 and P 4 are obtained by subtracting the value obtained by multiplying the output signal of the light receiving element 54 by the constant coefficient K from the output signal of the light receiving element 54. In other words, Tona-51
Is T, the output signal of the light receiving element 54 is a, and the output signal of the light receiving element 56 is b, then T∝a−Kb.
【００２６】受光素子５４、５６は、各々の反射光を光
電変換して出力信号ａ、ｂを出力し、この出力信号ａ、
ｂは図３に示す信号処理手段として備えた信号処理回路
５８に送られる。信号処理回路５８は、増幅器５８ａ、
５８ｂと差動増幅器５８ｃとからなり、増幅器５８ａは
受光素子５４の出力信号ａをそのまま出力し、増幅器５
８ｂは受光素子５６の出力信号ｂに一定係数Ｋを乗じた
ｂＫの出力信号を出力するようにゲイン調整する。そし
て、増幅器５８ａ、５８ｂの出力信号ａ、ｂＫを入力す
る差動増幅器５８ｃがその差信号を算出し、測定デ−タ
Ｔとして出力する。このようにしてトナ−５１の付着量
が測定される。なお、出力信号ａが小さい場合は、増幅
器５８ａ、５８ｂに一定増幅率を与えればよい。The light receiving elements 54 and 56 photoelectrically convert the respective reflected lights and output output signals a and b.
b is sent to the signal processing circuit 58 provided as the signal processing means shown in FIG. The signal processing circuit 58 includes an amplifier 58a,
The amplifier 58a is composed of a differential amplifier 58c and a differential amplifier 58c.
8b adjusts the gain so that the output signal b of the light receiving element 56 is multiplied by a constant coefficient K to output an output signal of bK. The differential amplifier 58c, which receives the output signals a and bK of the amplifiers 58a and 58b, calculates the difference signal and outputs it as the measurement data T. In this way, the adhesion amount of the toner 51 is measured. When the output signal a is small, a constant amplification factor may be given to the amplifiers 58a and 58b.
【００２７】上記した実施例は、第２の受光手段を感光
ドラム５０の法線方向に備えて構成したが、これに限ら
ず、図４に示すように構成することもできる。この実施
例では、投光手段５９から投光される単一偏光の光Ｐに
対し、第１の受光手段６０に向かう反射光は上記実施例
と同様にトナ−の表面で反射するＰ偏光とＳ偏光の光、
感光ドラム６１の表面で反射するＰ偏光の光となり、こ
のうち、トナ−の表面で反射するＳ偏光の光はこの受光
手段６０によってカットされ、Ｐ偏光の光のみが第１の
受光手段６０によって受光される。In the above-mentioned embodiment, the second light receiving means is provided in the direction normal to the photosensitive drum 50. However, the present invention is not limited to this, and the second light receiving means may be configured as shown in FIG. In this embodiment, with respect to the single-polarized light P projected from the light projecting means 59, the reflected light traveling toward the first light receiving means 60 is the P-polarized light reflected on the surface of the toner as in the above-mentioned embodiments. S-polarized light,
The P-polarized light reflected by the surface of the photosensitive drum 61 becomes P-polarized light, of which the S-polarized light reflected by the surface of the toner is cut by the light receiving means 60, and only the P-polarized light by the first light receiving means 60. Received light.
【００２８】また、第２の受光手段６２に向かう反射光
は、この第２の受光手段６２の配置が感光ドラム６１に
対して法線方向でないことから第１の受光手段６０と同
様に、トナ−の表面で反射するＰ偏光とＳ偏光の光、感
光ドラム６１の表面で反射するＰ偏光の光となり、この
うち、Ｐ偏光の光はこの受光手段６２によってカットさ
れ、トナ−の表面で反射するＳ偏光の光のみが第２の受
光手段６２によって受光される。The reflected light traveling toward the second light receiving means 62 is similar to the first light receiving means 60 because the arrangement of the second light receiving means 62 is not in the direction normal to the photosensitive drum 61. The P-polarized light and the S-polarized light reflected on the surface of −, and the P-polarized light reflected on the surface of the photosensitive drum 61, of which the P-polarized light is cut by the light receiving means 62 and reflected on the surface of the toner. Only the S-polarized light to be received is received by the second light receiving means 62.
【００２９】したがって、上記実施例と同様、第１の受
光手段６０の出力信号をａ、第２の受光手段６２の出力
信号をｂとすれば、トナ−の付着量Ｔを、Ｔ∝ａ−Ｋｂ
（Ｋは一定係数）で求めることができる。Therefore, as in the above embodiment, if the output signal of the first light receiving means 60 is a and the output signal of the second light receiving means 62 is b, the toner adhesion amount T is T∝a−. Kb
(K is a constant coefficient).
【００３０】図５は、本発明の第２実施例を示す付着量
測定装置の簡略的な部分図である。この実施例は、トナ
−５１への投光によって反射する光を偏光分離プリズム
６３でＰ偏光の光とＳ偏光の光とに分離し、これら分離
された光を第１、第２の受光手段６４、６５で受光する
構成としたものである。なお、この実施例の説明のなか
で、第１実施例と同様の部材については同一符号を付し
てその説明を省略してある。FIG. 5 is a simplified partial view of an adhesion amount measuring device showing a second embodiment of the present invention. In this embodiment, the light reflected by the light projected onto the toner 51 is separated into a P-polarized light and an S-polarized light by the polarization separation prism 63, and the separated light is divided into first and second light receiving means. The configuration is such that 64 and 65 receive light. In the description of this embodiment, the same members as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.
【００３１】カラ−用トナ−５１には光源５２からの光
のうち、Ｐ偏光フィルタ５３によって選別されたＰ偏光
の光Ｐ1が投光される。トナ−５１に投光された光は、
一部が誘電体のトナ−５１によってＰ偏光の光Ｐ2とＳ
偏光の光Ｓ2とになって反射し、トナ−５１を透過した
光は一部が感光体５０ｂの表面でＰ偏光の光Ｐ3となっ
て反射する。また、感光体５０ｂを透過した残りの光は
全て回転ドラム５０ａの表面でＰ偏光の光Ｐ4となって
反射する。The P-polarized light P 1 selected by the P-polarization filter 53 among the light from the light source 52 is projected onto the color toner 51. The light projected on Tona-51 is
The P-polarized light P 2 and S is generated by the toner 51, which is partially dielectric.
The polarized light S 2 is reflected, and the light transmitted through the toner 51 is partially reflected as P-polarized light P 3 on the surface of the photoconductor 50b. Also reflected as light P 4 P-polarized light on the surface of all the remaining light transmitted through the photosensitive member 50b is a rotary drum 50a.
【００３２】これら反射光Ｓ2、Ｐ2、Ｐ3、Ｐ4は反射光
路上に備えた偏光分離プリズム６３に入射し、Ｐ成分の
光Ｐ2、Ｐ3、Ｐ4とＳ成分の光Ｓ2とに分離される。この
ようにして分離された光は、各々の光路上に備えた受光
素子６４、６５によって受光される。つまり、受光素子
６４はＰ偏光の光Ｐ2、Ｐ3、Ｐ4を受光し、受光素子６
５はＳ偏光の光Ｓ2を受光する。These reflected lights S 2 , P 2 , P 3 , P 4 are incident on the polarization separation prism 63 provided on the reflected light path, and the P component lights P 2 , P 3 , P 4 and the S component light S It is separated into 2 . The light thus separated is received by the light receiving elements 64 and 65 provided on the respective optical paths. That is, the light receiving element 64 receives the P-polarized light P 2 , P 3 , and P 4 , and the light receiving element 6
Reference numeral 5 receives S-polarized light S 2 .
【００３３】そして、Ｐ偏光の光Ｐ2とＳ偏光の光Ｓ2と
は各々トナ−５１の表面による反射光であり、これらは
比例関係にあることから、受光素子６４の出力信号を
ａ、受光素子６５の出力信号をｂとすれば、トナ−５１
の付着量Ｔは、Ｔ∝ａ−Ｋｂ（Ｋは一定係数）として求
めることができる。上記したトナ−５１の付着量Ｔの算
出は、第１実施例と同様の信号処理回路５８で行なわれ
る。The P-polarized light P 2 and the S-polarized light S 2 are reflected lights by the surface of the toner 51, respectively, and since they are in a proportional relationship, the output signal of the light receiving element 64 is a, If the output signal of the light receiving element 65 is b, the toner 51
The adhered amount T of can be calculated as T∝a−Kb (K is a constant coefficient). The calculation of the adhesion amount T of the toner 51 is performed by the signal processing circuit 58 similar to that of the first embodiment.
【００３４】[0034]
【発明の効果】上記した通り、本発明に係るカラ−用ト
ナ−の付着量測定装置は、光の偏光を利用して測定する
ため、トナ−の付着量が多少に関係なく、その付着量を
正確に測定することができる。As described above, the apparatus for measuring the adhered amount of the toner for color according to the present invention uses the polarization of light to measure, so that the adhered amount of the toner is irrelevant regardless of the adhered amount. Can be measured accurately.
【図１】本発明の第１実施例であり、付着量測定装置の
簡略的な斜視図である。FIG. 1 is a first embodiment of the present invention and is a simplified perspective view of an adhesion amount measuring device.
【図２】図１に示す付着量測定装置の簡略的な部分図で
ある。FIG. 2 is a simplified partial view of the adhesion amount measuring device shown in FIG.
【図３】付着量測定装置に備えた信号処理回路を示す回
路図である。FIG. 3 is a circuit diagram showing a signal processing circuit provided in the adhesion amount measuring device.
【図４】第１実施例の応用例を示し、付着量測定装置を
側面からみた簡略図である。FIG. 4 is a schematic view showing an application example of the first embodiment and a side view of the adhesion amount measuring device.
【図５】本発明の第２実施例であり、付着量測定装置の
簡略的な部分図である。5 is a second embodiment of the present invention, which is a simplified partial view of an adhesion amount measuring device. FIG.
【図６】従来例として示した付着量測定装置の簡略的な
部分図である。FIG. 6 is a simplified partial view of an adhesion amount measuring device shown as a conventional example.
【図７】従来における他の例として示した付着量測定装
置の簡略的な部分図である。FIG. 7 is a simplified partial view of an adhesion amount measuring device shown as another conventional example.
【図８】図６に示した付着量測定装置の測定曲線を示す
図である。8 is a diagram showing a measurement curve of the adhesion amount measuring device shown in FIG.
【図９】図７で示した付着量測定装置の測定曲線を示す
図である。9 is a diagram showing a measurement curve of the adhesion amount measuring device shown in FIG.
５０ 感光ドラム ５１ トナ− ５２ 光源 ５３ Ｐ偏光フィルタ ５４ 受光素子 ５５ Ｐ偏光フィルタ ５６ 受光素子 ５７ Ｓ偏光フィルタ ５８ 信号処理回路 50 Photosensitive Drum 51 Toner 52 Light Source 53 P Polarizing Filter 54 Light Receiving Element 55 P Polarizing Filter 56 Light Receiving Element 57 S Polarizing Filter 58 Signal Processing Circuit
Claims (1)
−用トナ−に単一偏光光を投光する投光手段と、上記ト
ナ−への投光によって反射する光のうち投光手段と同一
の偏光光を選択して受光する第１の受光手段と、上記ト
ナ−への投光によって反射する光のうち投光手段と異な
る偏光光を選択して受光する第２の受光手段と、第１、
第２の受光手段の受光出力にもとづく信号差に応じてト
ナ−付着情報を出力する信号処理手段とを備えて構成し
たことを特徴とする転写形カラ−プリンタのトナ−付着
量測定装置。1. A light projecting means for projecting a single polarized light onto a color toner, which is a dielectric material attached to a photosensitive drum, and a light projecting means out of the light reflected by the light projected onto the toner. First light receiving means for selecting and receiving the same polarized light; and second light receiving means for selecting and receiving polarized light different from the light projecting means among the light reflected by the light projected onto the toner, First,
A toner adhesion amount measuring device for a transfer type color printer, comprising: a signal processing means for outputting toner adhesion information in accordance with a signal difference based on a light reception output of a second light receiving means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5059328A JP2729976B2 (en) | 1993-02-25 | 1993-02-25 | Measuring device for toner adhesion of transfer type color printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5059328A JP2729976B2 (en) | 1993-02-25 | 1993-02-25 | Measuring device for toner adhesion of transfer type color printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06250480A true JPH06250480A (en) | 1994-09-09 |
| JP2729976B2 JP2729976B2 (en) | 1998-03-18 |
Family
ID=13110172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5059328A Expired - Fee Related JP2729976B2 (en) | 1993-02-25 | 1993-02-25 | Measuring device for toner adhesion of transfer type color printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2729976B2 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09211906A (en) * | 1996-02-02 | 1997-08-15 | Ricoh Co Ltd | Image forming device |
| EP1231520A2 (en) | 2001-02-09 | 2002-08-14 | Canon Kabushiki Kaisha | Image forming apparatus |
| JP2002310901A (en) * | 2001-04-17 | 2002-10-23 | Nichicon Corp | Deposit measuring instrument for toner |
| US6512898B2 (en) | 2000-05-15 | 2003-01-28 | Canon Kabushiki Kaisha | Image forming apparatus for detecting the density of toner |
| US6597878B2 (en) * | 2000-09-29 | 2003-07-22 | Seiko Epson Corporation | Apparatus for measuring quantity of toner, and image forming apparatus comprising measuring apparatus |
| US6775489B2 (en) | 2001-06-07 | 2004-08-10 | Canon Kabushiki Kaisha | Image forming apparatus capable of detecting density of toner image |
| US7269362B2 (en) | 2003-05-29 | 2007-09-11 | Seiko Epson Corporation | Image forming apparatus, control method and toner consumption calculating apparatus and method |
| US7444091B2 (en) | 2005-01-21 | 2008-10-28 | Kyocera Mita Corporation | Image forming apparatus having a toner carrying member |
| US7551866B2 (en) | 2005-06-30 | 2009-06-23 | Ricoh Company, Ltd. | Image forming method and apparatus with improved conversion capability of amount of toner adhesion |
| US7623801B2 (en) | 2005-03-31 | 2009-11-24 | Seiko Epson Corporation | Image forming apparatus and control method thereof |
| JP2010020308A (en) * | 2008-07-08 | 2010-01-28 | Toshiba Corp | Device and method for detecting deposition amount of toner |
| US7680425B2 (en) | 2003-07-18 | 2010-03-16 | Seiko Epson Corporation | Image forming apparatus and method for controlling tone characteristics based on tone-control patch image |
| US7773899B2 (en) | 2003-03-14 | 2010-08-10 | Ricoh Company, Ltd. | Image forming apparatus and method of calculating an amount of toner transfer by converting diffuse reflection output into a conversion value |
| JP2011150244A (en) * | 2010-01-25 | 2011-08-04 | Canon Inc | Image forming apparatus |
| JP2012037258A (en) * | 2010-08-04 | 2012-02-23 | Konica Minolta Business Technologies Inc | Detector and image forming apparatus |
| US8670684B2 (en) | 2011-10-31 | 2014-03-11 | Kyocera Document Solutions Inc. | Image forming apparatus |
| US10719038B2 (en) | 2018-07-26 | 2020-07-21 | Canon Kabushiki Kaisha | Image forming apparatus adjusting light emission of light-emitting element |
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| JPS5118835A (en) * | 1974-06-26 | 1976-02-14 | Puro Kasa G Rejisutaa Torasuto | Chikudenchi aruiha chikudenchibatsuteriinojudenhoho |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09211906A (en) * | 1996-02-02 | 1997-08-15 | Ricoh Co Ltd | Image forming device |
| US6512898B2 (en) | 2000-05-15 | 2003-01-28 | Canon Kabushiki Kaisha | Image forming apparatus for detecting the density of toner |
| EP1843217A3 (en) * | 2000-09-29 | 2008-12-03 | Seiko Epson Corporation | Apparatus for measuring quantity of toner, and image forming apparatus comprising measuring apparatus |
| US6597878B2 (en) * | 2000-09-29 | 2003-07-22 | Seiko Epson Corporation | Apparatus for measuring quantity of toner, and image forming apparatus comprising measuring apparatus |
| EP1843217A2 (en) * | 2000-09-29 | 2007-10-10 | Seiko Epson Corporation | Apparatus for measuring quantity of toner, and image forming apparatus comprising measuring apparatus |
| EP1231520A2 (en) | 2001-02-09 | 2002-08-14 | Canon Kabushiki Kaisha | Image forming apparatus |
| EP1231520A3 (en) * | 2001-02-09 | 2005-11-23 | Canon Kabushiki Kaisha | Image forming apparatus |
| JP2002310901A (en) * | 2001-04-17 | 2002-10-23 | Nichicon Corp | Deposit measuring instrument for toner |
| JP4554840B2 (en) * | 2001-04-17 | 2010-09-29 | ニチコン株式会社 | Toner adhesion measuring device |
| US6775489B2 (en) | 2001-06-07 | 2004-08-10 | Canon Kabushiki Kaisha | Image forming apparatus capable of detecting density of toner image |
| US7773899B2 (en) | 2003-03-14 | 2010-08-10 | Ricoh Company, Ltd. | Image forming apparatus and method of calculating an amount of toner transfer by converting diffuse reflection output into a conversion value |
| US7269362B2 (en) | 2003-05-29 | 2007-09-11 | Seiko Epson Corporation | Image forming apparatus, control method and toner consumption calculating apparatus and method |
| US7680425B2 (en) | 2003-07-18 | 2010-03-16 | Seiko Epson Corporation | Image forming apparatus and method for controlling tone characteristics based on tone-control patch image |
| US7444091B2 (en) | 2005-01-21 | 2008-10-28 | Kyocera Mita Corporation | Image forming apparatus having a toner carrying member |
| US7623801B2 (en) | 2005-03-31 | 2009-11-24 | Seiko Epson Corporation | Image forming apparatus and control method thereof |
| US7551866B2 (en) | 2005-06-30 | 2009-06-23 | Ricoh Company, Ltd. | Image forming method and apparatus with improved conversion capability of amount of toner adhesion |
| JP2010020308A (en) * | 2008-07-08 | 2010-01-28 | Toshiba Corp | Device and method for detecting deposition amount of toner |
| JP2011150244A (en) * | 2010-01-25 | 2011-08-04 | Canon Inc | Image forming apparatus |
| JP2012037258A (en) * | 2010-08-04 | 2012-02-23 | Konica Minolta Business Technologies Inc | Detector and image forming apparatus |
| US8670684B2 (en) | 2011-10-31 | 2014-03-11 | Kyocera Document Solutions Inc. | Image forming apparatus |
| US10719038B2 (en) | 2018-07-26 | 2020-07-21 | Canon Kabushiki Kaisha | Image forming apparatus adjusting light emission of light-emitting element |
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|---|---|
| JP2729976B2 (en) | 1998-03-18 |
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