JPH046015U - - Google Patents
Info
- Publication number
- JPH046015U JPH046015U JP4651590U JP4651590U JPH046015U JP H046015 U JPH046015 U JP H046015U JP 4651590 U JP4651590 U JP 4651590U JP 4651590 U JP4651590 U JP 4651590U JP H046015 U JPH046015 U JP H046015U
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- scanning
- laser
- semiconductor laser
- horizontal synchronization
- 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 9
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
第１図は本考案によるレーザビーム走査位置検
出装置のブロツク構成図、第２図はその一実施例
を適用した走査光学系の構成を概略的に示す図、
第３図は第２図の−断面相当図、第４図Ａは
モニタフオトダイオードからの出力信号を示す図
、Ｂは水平同期検出回路からの出力信号を示す図
、第５図は他の実施例を走査光学系の構成を概略
的に示す図、第６図は従来例としての走査光学系
の構成を概略的に示す図である。
１……ポリゴンミラー（反射偏向手段）、５…
…ミラー（反射部材）、１０……半導体レーザ、
１２……モニタダイオード、２３……水平同期検
出回路、ＬＢ……レーザビーム。
FIG. 1 is a block configuration diagram of a laser beam scanning position detection device according to the present invention, and FIG. 2 is a diagram schematically showing the configuration of a scanning optical system to which one embodiment of the device is applied.
Fig. 3 is a diagram corresponding to the - cross section of Fig. 2, Fig. 4 A is a diagram showing the output signal from the monitor photodiode, B is a diagram showing the output signal from the horizontal synchronization detection circuit, and Fig. 5 is a diagram showing another implementation. FIG. 6 is a diagram schematically showing the configuration of a scanning optical system as an example, and FIG. 6 is a diagram schematically showing the configuration of a scanning optical system as a conventional example. 1... Polygon mirror (reflection deflection means), 5...
... Mirror (reflection member), 10 ... Semiconductor laser,
12...Monitor diode, 23...Horizontal synchronization detection circuit, LB...Laser beam.
Claims (1)
向手段の移動によつて所定角度範囲走査させるレ
ーザ走査光学系に於て、 前記半導体レーザを、前記反射偏向手段による
レーザビーム走査可能範囲内に配置すると共に、
前記半導体レーザに備えられたモニタダイオード
の出力信号のパルス成分を検出する水平同期検出
回路を備え、 前記レーザビームが前記半導体レーザ位置を走
査する際に前記モニタダイオードが該走査レーザ
ビームを検知して出力するパルス信号を、前記水
平同期検出回路で検出し、これを水平同期信号と
するよう構成したこと、を特徴とするレーザビー
ム走査位置検出装置。 (2) 半導体レーザからのレーザビームを反射偏
向手段の移動によつて所定角度範囲走査させるレ
ーザ走査光学系に於て、 前記反射偏向手段によるレーザビーム走査範囲
内の所定位置に、当該位置に於る走査レーザビー
ムと垂直に反射部材を配置すると共に、前記半導
体レーザに備えられたモニタダイオードの出力信
号のパルス成分を検出する水平同期検出回路を備
え、 前記レーザビームが前記反射部材位置を走査す
る際に該反射部材及び前記反射偏向手段により反
射されて前記半導体レーザに戻る当該走査レーザ
ビームを前記モニタダイオードが検知して出力す
るパルス信しを、前記水平同期検出回路で検出し
、これを水平同期信号とするよう構成したこと、
を特徴とするレーザビーム走査位置検出装置。[Claims for Utility Model Registration] (1) In a laser scanning optical system that scans a laser beam from a semiconductor laser over a predetermined angle range by moving a reflective deflection means, the semiconductor laser is scanned by the reflective deflection means. In addition to placing it within the beam scanning range,
A horizontal synchronization detection circuit detects a pulse component of an output signal of a monitor diode provided in the semiconductor laser, and the monitor diode detects the scanning laser beam when the laser beam scans the semiconductor laser position. A laser beam scanning position detection device characterized in that the pulse signal to be output is detected by the horizontal synchronization detection circuit and used as a horizontal synchronization signal. (2) In a laser scanning optical system that scans a laser beam from a semiconductor laser in a predetermined angle range by moving a reflective deflection means, the laser beam is scanned at a predetermined position within the laser beam scanning range by the reflective deflection means; A reflecting member is disposed perpendicularly to the scanning laser beam, and a horizontal synchronization detection circuit is provided to detect a pulse component of an output signal of a monitor diode provided in the semiconductor laser, and the laser beam scans the reflecting member position. At this time, the monitor diode detects and outputs the scanning laser beam that is reflected by the reflection member and the reflective deflection means and returns to the semiconductor laser, and the horizontal synchronization detection circuit detects the pulse signal, configured to be a synchronous signal;
A laser beam scanning position detection device characterized by:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4651590U JPH046015U (en) | 1990-04-27 | 1990-04-27 | |
| US08/480,867 US5497184A (en) | 1990-04-27 | 1995-06-07 | Laser scanning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4651590U JPH046015U (en) | 1990-04-27 | 1990-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH046015U true JPH046015U (en) | 1992-01-21 |
Family
ID=33446697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4651590U Pending JPH046015U (en) | 1990-04-27 | 1990-04-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH046015U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62254566A (en) * | 1986-04-26 | 1987-11-06 | Hitachi Ltd | Laser beam control device |
-
1990
- 1990-04-27 JP JP4651590U patent/JPH046015U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62254566A (en) * | 1986-04-26 | 1987-11-06 | Hitachi Ltd | Laser beam control device |
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