JPS6319814U - - Google Patents
Info
- Publication number
- JPS6319814U JPS6319814U JP11110486U JP11110486U JPS6319814U JP S6319814 U JPS6319814 U JP S6319814U JP 11110486 U JP11110486 U JP 11110486U JP 11110486 U JP11110486 U JP 11110486U JP S6319814 U JPS6319814 U JP S6319814U
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- polygon mirror
- laser
- mirror motor
- signal
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Mechanical Optical Scanning Systems (AREA)
Description
第１図〜第３図は本考案の一実施例を示し、第
１図はレーザ光走査装置の全体構成説明図、第２
図は第１図に示すレーザ光走査装置の制御ブロツ
ク図、第３図は第２図に示すレーザ光走査制御の
タイミングチヤート、第４図は従来形レーザ光走
査装置の全体構成説明図、第５図は第４図に示す
レーザ光走査装置の制御ブロツク図、第６図は第
５図に示すレーザ光走査制御のタイミングチヤー
ト、第７図はＦθレンズの機能説明図である。
１……レーザダイオード、２……コリメータレ
ンズ、３……ポリゴンミラーモータ、４……ポリ
ゴンミラー、６……Ｆθレンズ、７……ミラー、
８……レーザ光検出器、９……感光ドラム、１１
……レーザ光検出回路、１２……制御装置、１３
……カウンタ回路。
1 to 3 show one embodiment of the present invention, FIG. 1 is an explanatory diagram of the overall configuration of a laser beam scanning device, and FIG.
The figure is a control block diagram of the laser beam scanning device shown in FIG. 1, FIG. 3 is a timing chart of the laser beam scanning control shown in FIG. 2, and FIG. 5 is a control block diagram of the laser beam scanning device shown in FIG. 4, FIG. 6 is a timing chart of laser beam scanning control shown in FIG. 5, and FIG. 7 is a functional explanatory diagram of the F.theta. lens. 1... Laser diode, 2... Collimator lens, 3... Polygon mirror motor, 4... Polygon mirror, 6... Fθ lens, 7... Mirror,
8... Laser photodetector, 9... Photosensitive drum, 11
... Laser light detection circuit, 12 ... Control device, 13
...Counter circuit.
Claims (1)
め、かつそのオンオフタイミングをコントロール
するレーザ光オンオフ制御系と、前記レーザ装置
から放出されるレーザ光を集光ならびに整形する
光学系と、レーザ光を反射して走査させるポリゴ
ンミラーならびにポリゴンミラーモータと、レー
ザ光を結像ならびに走査させるＦθレンズと、レ
ーザ光を１走査ごとに検出するレーザ光検出器と
を備えるレーザ光走査装置において、前記レーザ
光検出器からの信号をポリゴンミラーの面数と同
じかあるいはポリゴンミラーの面数の整数倍カウ
ントするカウンタ回路を設け、前記カウンタ回路
からの信号をポリゴンミラーモータの回転検出信
号として、そのポリゴンミラーモータの回転検出
信号からポリゴンミラーモータの回転を検出する
手段を具備してなることを特徴とするレーザ光走
査装置におけるポリゴンミラーモータの回転検出
機構。 A laser beam on/off control system that turns on and off the laser beam from the laser device and controls its on/off timing; an optical system that focuses and shapes the laser beam emitted from the laser device; and an optical system that reflects the laser beam. In a laser beam scanning device comprising a polygon mirror and a polygon mirror motor for scanning, an Fθ lens for forming and scanning laser beams, and a laser beam detector for detecting laser beams for each scan, from the laser beam detector to A counter circuit is provided that counts the signal equal to the number of faces of the polygon mirror or an integral multiple of the number of faces of the polygon mirror, and the signal from the counter circuit is used as a rotation detection signal of the polygon mirror motor to detect the rotation of the polygon mirror motor. 1. A rotation detection mechanism for a polygon mirror motor in a laser beam scanning device, comprising means for detecting rotation of the polygon mirror motor from a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11110486U JPS6319814U (en) | 1986-07-18 | 1986-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11110486U JPS6319814U (en) | 1986-07-18 | 1986-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6319814U true JPS6319814U (en) | 1988-02-09 |
Family
ID=30990718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11110486U Pending JPS6319814U (en) | 1986-07-18 | 1986-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6319814U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0789375A2 (en) | 1996-02-09 | 1997-08-13 | Hitachi, Ltd. | Gas insulated interrupter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028266A (en) * | 1973-07-11 | 1975-03-22 | ||
| JPS5840525A (en) * | 1981-09-04 | 1983-03-09 | Ricoh Co Ltd | Light scanning device |
-
1986
- 1986-07-18 JP JP11110486U patent/JPS6319814U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028266A (en) * | 1973-07-11 | 1975-03-22 | ||
| JPS5840525A (en) * | 1981-09-04 | 1983-03-09 | Ricoh Co Ltd | Light scanning device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0789375A2 (en) | 1996-02-09 | 1997-08-13 | Hitachi, Ltd. | Gas insulated interrupter |
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