Two-dimensional surface emitting laser array, two-dimensional surface emitting laser beam scanner, two-dimensional surface emitting laser beam recorder, and two-dimensional surface emitting laser beam recording method

• US 6,144,685 A
• Filed: 11/04/1998
• Issued: 11/07/2000
• Est. Priority Date: 01/23/1996
• Status: Expired due to Fees

• Current Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Yamamoto, Masateru, Iwasa, Izumi, Otake, Shigeyuki, Sakamoto, Akira
• Primary Examiner(s): Bovernick, Rodney
• Assistant Examiner(s): Kim, Ellen E.
• Application Number:
  US09/185,617
• Time in Patent Office: 734 Days
• Field of Search: 372/24, 372/50, 359/216, 359/385, 347/258, 347/233, 369/97
• US Class Current: 372/50.12
• CPC Class Codes: B41J 2/45 using light-emitting diode [LED] or laser arrays
• CPC Class Codes: H01S 5/423 having a vertical cavity

Abstract

A plurality of lasers (having openings 170) are formed at predetermined positions at equal intervals on at least two main scanning lines on a semiconductor substrate 100. The lasers have each a predetermined beam diameter and take different positions in the main scanning direction, thereby providing a two-dimensional surface emitting laser array emitting laser beams through a lens system to form a pixel line with no gap on the main scanning line of an image formation face moving in the sub-scanning direction. The two-dimensional surface emission laser array is used to provide a laser beam scanner, a laser beam recorder, and a laser beam recording method.

Claims

1. A two-dimensional surface emitting laser array comprising:

a substrate;

a first laser array having a plurality of lasers placed in a first spacing along a base line on said substrate; and

at least a second laser array having a plurality of lasers placed along a plurality of inclined lines, each laser crossing the base line at a predetermined angle on the substrate,

the lasers of said first laser array and the lasers of at least said second laser array being placed so as to form an array of pixels equally spaced from each other and with no gap in the direction of the base line,

the inclined lines including a first inclined line having a first angle as the predetermined angle and a second inclined line having a second angle different from the first angle, and

the lasers of at least the second laser array being placed along the first inclined line and the second inclined line.

2. The two-dimensional surface emitting laser array of claim 1, the lasers placed along the first inclined line and the lasers placed along the second inclined line being placed at different positions in a direction perpendicular to the base line.

3. The two-dimensional surface emitting laser array of claim 1, the lasers placed along the first inclined lines and the lasers placed along the second inclined line including a plurality of lasers in a direction perpendicular to the base line.