Two-dimensional surface emitting laser array, multi-beam scanning unit employing the same and image forming apparatus
A laser array and surface emission technology, applied in the direction of laser devices, semiconductor laser devices, lasers, etc., can solve the problem that the laser array cannot be used for imaging devices with different resolutions
Inactive Publication Date: 2007-10-17
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology
That is to say, the conventional two-dimensional surface-emitting laser array cannot be formed at the sub-scanning pitch P as shown in FIG. 11 two scanning lines equally spaced apart, and formed to be larger or smaller than the sub-scanning pitch P 11 Scan lines separated by a sub-scan pitch of
Therefore, conventional two-dimensional surface-emitting laser arrays generally cannot be adopted by imaging devices with different resolutions
Method used
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[0046] The present invention will be explained more fully with reference to the accompanying drawings showing exemplary embodiments of the present invention.
[0047] Fig. 3 is a perspective view showing the arrangement of a multi-beam scanning unit according to an exemplary embodiment of the present invention.
[0048] 3, the multi-beam scanning unit scans the light onto the photosensitive medium 50, which has an exposed surface that rotates around the direction D. The multi-beam scanning unit includes a two-dimensional surface-emitting laser array 10 and a beam deflector 30. The two-dimensional surface-emitting laser array 10 emits a plurality of laser beams with predetermined intervals along the sub-scanning direction Y of the photosensitive medium 50, and the beam deflector 30 deflects and scans the multiple laser beams emitted by the two-dimensional surface emitting laser array 10 along the main scanning direction X of the photosensitive medium 50.
[0049] The beam deflector...
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The present invention provides a two-dimensional surface emitting laser array having two sub-scanning pitches is provided. A multi-beam scanning unit employs the two-dimensional surface emitting laser array, and an image forming apparatus employs the multi-beam scanning unit. The two-dimensional surface emitting laser array includes n x m surface emitting lasers (15) including n surface emitting lasers arranged with substantially equal spacing a on base lines N, and m surface emitting lasers arranged with substantially equal spacing b on n inclined lines M that are inclined at an angle with respect to the base lines N and pass through the respective n surface emitting lasers. A plurality of first scan lines spaced apart by a first sub-scanning pitch P 1 or a plurality of second scan lines spaced by a second sub-scanning pitch P 2 whose width is different from that of the first sub-scanning pitch P 1 are selectively formed. the variables a, b,and satisfy where n and m are positive integers greater than 2,and phi is an angle between a first scan line and a second scan line.
Description
Technical field [0001] The present invention relates to a two-dimensional surface emitting laser array, a multi-beam scanning unit using the two-dimensional surface emitting laser array, and an imaging device using the multi-beam scanning unit. More particularly, the present invention relates to a two-dimensional surface-emitting laser array for forming two types of scanning lines separated by different sub-scanning pitches, a multi-beam scanning unit using the two-dimensional surface-emitting laser array, and a multi-beam scanning unit using the two-dimensional surface-emitting laser array. The imaging device of the unit. Background technique [0002] Since the multi-beam scanning unit uses a light source array capable of emitting multiple laser beams to scan multiple scanning lines at the same time, compared with a single-beam scanning unit that uses a single beam, this multi-beam scanning unit can reduce the driving speed of the beam deflector. The number of revolutions of the...
Claims
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IPC IPC(8): G03G15/04H01S5/40H01S5/42G02B26/10G03G15/00B41J2/455
CPCH01S5/423B41J2/473G02B26/123H01S5/18H04N9/3161
Inventor 朴基成
Owner SAMSUNG ELECTRONICS CO LTD