JPS636818B2 - - Google Patents
Info
- Publication number
- JPS636818B2 JPS636818B2 JP56056696A JP5669681A JPS636818B2 JP S636818 B2 JPS636818 B2 JP S636818B2 JP 56056696 A JP56056696 A JP 56056696A JP 5669681 A JP5669681 A JP 5669681A JP S636818 B2 JPS636818 B2 JP S636818B2
- Authority
- JP
- Japan
- Prior art keywords
- photo sensor
- electrode
- electrodes
- light receiving
- lead wire
- 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
- 238000000034 method Methods 0.000 claims description 6
- 238000011109 contamination Methods 0.000 claims description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0252—Constructional arrangements for compensating for fluctuations caused by, e.g. temperature, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a photometer; Purge systems, cleaning devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optical Measuring Cells (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Description
【発明の詳細な説明】
本発明は粉塵等の微粒子がフオトセンサの受光
面に付着して受光感度を減衰させる事のない様に
したフオトセンサ汚染防止方法に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photo sensor contamination prevention method that prevents fine particles such as dust from adhering to the light receiving surface of the photo sensor and reducing the light receiving sensitivity.
近年、自動制御の発達に伴い工場等でフオトセ
ンサの使用が多くなつて来た事が、工場内の塵埃
等がフオトセンサの受光面に付着して受光感度が
低下すると云う事故が多くなつた。特にフオトセ
ンサが或る機器内に設けられ、この機器内で本来
的に微粉子を取扱う形式の機器例えば静電複写機
にとつては非常に大きな問題となつて来ている。 In recent years, with the development of automatic control, the use of photo sensors has increased in factories, etc., and there have been many accidents in which dust in the factory adheres to the light-receiving surface of the photo sensor, reducing the light-receiving sensitivity. In particular, this has become a very serious problem for devices in which a photo sensor is installed in a certain device and the device inherently handles fine powder, such as an electrostatic copying machine.
複写機においては、コピーの画像濃度を一定に
する為に、感材上のトナー画像濃度をフオトセン
サーにより検出し、基準濃度と比較し、トナー供
給量、現像バイヤス値、レンズの絞り等を自動的
に制御するシステムが採用されているが、このた
めフオトセンサを感材表面及びトナー像と近接し
て設置しなければならない。従つて浮遊トナーに
よつてセンサーの受光用レンズ部が汚れてしまい
感材上のトナー画像濃度が正確に検出できなくな
る不具合が発生していた。 In order to maintain a constant copy image density, copying machines use a photo sensor to detect the toner image density on the photosensitive material, compare it with a standard density, and automatically adjust toner supply amount, development bias value, lens aperture, etc. However, for this purpose, the photo sensor must be installed close to the surface of the sensitive material and the toner image. Therefore, the light-receiving lens portion of the sensor is contaminated by the floating toner, resulting in a problem that the toner image density on the photosensitive material cannot be accurately detected.
次に本発明方法実施例を図面について説明す
る。 Next, embodiments of the method of the present invention will be described with reference to the drawings.
第１図に本発明方法に依るフオトセンサの斜視
図を、第２図にそのＡ―Ａ縦断面図を示すが、フ
オトセンサ例えば光電素子Ｃを中央におき、この
受光レンズＬの周りに扇形電極を４枚配置し夫々
の電極からリード線ｅを引き出す。ｂは電極の支
持体であり耐圧の大きい絶縁材の筒より成り、そ
の頂面に上記電極を蒸着等で設け、中央中空部に
光電素子Ｃを固定する。扇形電極ａは夫々互いに
絶縁する様にエツチング加工或いは鋸引き等でギ
ヤツプＳを設ける。リード線ｅは電極の下面より
絶縁材の内部を貫通して下方に引き出す。ｆは光
電素子用のリード線である。 FIG. 1 is a perspective view of a photo sensor according to the method of the present invention, and FIG. 2 is a longitudinal cross-sectional view taken along line A-A. Four electrodes are arranged and a lead wire e is drawn out from each electrode. b is a support for the electrode, and is made of a cylinder made of an insulating material with a high withstand voltage.The electrode is provided on the top surface by vapor deposition or the like, and the photoelectric element C is fixed in the central hollow part. A gap S is provided in each of the fan-shaped electrodes a by etching or sawing so as to insulate them from each other. The lead wire e penetrates the inside of the insulating material from the lower surface of the electrode and is drawn out downward. f is a lead wire for the photoelectric element.
本フオトセンサは第３図にその上面を示す様に
相隣接する電極が互いに異極となる様に直流高圧
電源ｄに接続する。すると第４図に示す様に異極
間にまたがり静電界が発生し、浮遊粒子ｇがこれ
ら電極の表面及ギヤツプＳに捕集堆積され、光電
素子の頂部即ち受光レンズ部Ｌには堆積しない。 This photo sensor is connected to a DC high-voltage power source d so that adjacent electrodes have different polarities, as shown in the top view of FIG. 3. Then, as shown in FIG. 4, an electrostatic field is generated across the different electrodes, and floating particles g are collected and deposited on the surfaces of these electrodes and the gap S, but not on the top of the photoelectric element, that is, on the light receiving lens portion L.
電極の数は４枚示したがこれに限定されるもの
ではなく、又その表面は平坦面として示したが尖
刺を設け電界強度を大きくするのもよい。更に光
電素子を中空部に取付ける際その受光レンズ部Ｌ
の埋込深さを深くすることにより絶縁材より成る
支持体をフードとして兼用せしめる事も出来る。 Although the number of electrodes is shown as four, it is not limited to this, and although the surface is shown as a flat surface, it is also possible to provide thorns to increase the electric field strength. Furthermore, when installing the photoelectric element in the hollow part, the light receiving lens part L
By increasing the depth of embedding, the support made of insulating material can also be used as a hood.
本発明方法は上記した様に複写機に対しては特
に効果大である。 As mentioned above, the method of the present invention is particularly effective for copying machines.
第１図は本発明方法を適用したフオトセンサの
斜視図、第２図はそのＡ―Ａ断面図、第３図は電
極接続を示す図、第４図は作動説明図である。
ａ…電極板、ｂ…電極支持体、ｃ…フオトセン
サー、ｄ…直流電源、ｅ…電極リード線、ｆ…フ
オトセンサーリード線、ｇ…浮遊トナー、Ｌ…レ
ンズ、Ｓ…電極ギヤツプ。
FIG. 1 is a perspective view of a photo sensor to which the method of the present invention is applied, FIG. 2 is a sectional view taken along the line AA, FIG. 3 is a diagram showing electrode connections, and FIG. 4 is an explanatory diagram of operation. a... Electrode plate, b... Electrode support, c... Photo sensor, d... DC power supply, e... Electrode lead wire, f... Photo sensor lead wire, g... Floating toner, L... Lens, S... Electrode gap.
Claims (1)
を配置し、該電極の隣接する電極がそれぞれ異極
となる様高電圧を印加したことを特徴とするフオ
トセンサの汚染防止方法。1. A method for preventing contamination of a photo sensor, which comprises arranging a plurality of electrodes around the light receiving part of the photo sensor, and applying a high voltage so that adjacent electrodes have different polarities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56056696A JPS57171221A (en) | 1981-04-14 | 1981-04-14 | Photo sensor with contamination resisting electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56056696A JPS57171221A (en) | 1981-04-14 | 1981-04-14 | Photo sensor with contamination resisting electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57171221A JPS57171221A (en) | 1982-10-21 |
| JPS636818B2 true JPS636818B2 (en) | 1988-02-12 |
Family
ID=13034614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56056696A Granted JPS57171221A (en) | 1981-04-14 | 1981-04-14 | Photo sensor with contamination resisting electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57171221A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02183424A (en) * | 1989-01-10 | 1990-07-18 | Canon Inc | Optical head |
-
1981
- 1981-04-14 JP JP56056696A patent/JPS57171221A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02183424A (en) * | 1989-01-10 | 1990-07-18 | Canon Inc | Optical head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57171221A (en) | 1982-10-21 |
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