Claims
- 1. A laser power detecting device, comprising:
- an optical system, provided in the optical path of a laser flux emitted from a laser light source, for guiding and emitting the laser flux;
- a deflector for deflecting and scanning the laser flux onto a photoconductive member;
- a beam splitter, provided between the optical system and the deflector, for splitting the laser flux emitted from the optical system to the deflector, a part of the split laser flux comprising a main flux, and a remaining part of the laser flux comprising a monitor flux; and
- a sensor for detecting the intensity of the monitor flux,
- wherein a condenser lens is positioned between the beam splitter and the sensor to converge the monitor flux onto the light receiving surface; and
- wherein the monitor flux emitted from the condenser lens is an out-of-focus condition when incident on the light receiving surface of the sensor.
- 2. The laser power detection device according to claim 1, further comprising:
- control means for controlling the power of the laser flux emitted from the laser light source in accordance with the power of the laser flux detected by said sensor.
- 3. The laser power detection device according to claim 1,
- wherein a light receiving surface of said sensor is inclined with respect to a plane perpendicular to the optical axis of the monitor flux guided to the sensor, and
- wherein a reflected monitor flux reflected by said light receiving surface is reflected in a direction away from the deflector and away from the laser light source.
- 4. The laser power detection device according to claim 1,
- wherein said optical system includes a collimator lens.
- 5. The laser power detection device according to claim 1,
- wherein said optical system includes a collimator lens and a plurality of optical fibers for guiding the laser flux from a plurality of laser light sources to said collimator lens, each of said plurality of optical fibers corresponding to one of said plurality of laser light sources.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-155180 |
May 1995 |
JPX |
|
8-075182 |
Mar 1996 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/654,824, filed May 29, 1996, the contensts of which are herein incorporated in its entirety.
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Non-Patent Literature Citations (3)
Entry |
United Kingdom Search Report dated Jun. 25, 1996. |
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Divisions (1)
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Number |
Date |
Country |
Parent |
654824 |
May 1996 |
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