Light source arrangement of a scanner

• US 5,768,663 A
• Filed: 01/29/1997
• Issued: 06/16/1998
• Est. Priority Date: 01/29/1997
• Status: Expired due to Term

• Current Assignee: Bob Lin
• Original Assignee: Bob Lin
• Inventors: Lin, Bob
• Primary Examiner(s): Braun, Fred L.
• Application Number:
  US08/790,616
• Time in Patent Office: 503 Days
• Field of Search: 399/220, 362/217, 358/480, 358/509
• US Class Current: 399/220
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: H01J 61/32 Special longitudinal shape, e.g. for advertising purposes H01J61/305 takes precedence
• CPC Class Codes: H04N 1/02815 Means for illuminating the original, not specific to a particular type of pick-up head
• CPC Class Codes: H04N 1/0287 using a tubular lamp or a combination of such lamps
• CPC Class Codes: H04N 1/02885 Means for compensating spatially uneven illumination, e.g. an aperture arrangement

Abstract

A light source mounted in a scanner adjacent to a platform thereof, including a lamp tube, the lamp tube having a straight middle section across the width of the scanner area within the platform, and two curved end sections respectively extended from both ends of the straight middle section at a contained angle, permitting light from the curved end sections and light from the straight middle section to overlap.

Claims

1. A light source in a scanner having a substantially planar platform with opposite lateral side edges, the light source comprising a lamp tube having a straight middle section and opposite end sections connected to the straight middle section by curved portions such that the end sections form angles of less than 180°

with the straight middle section, the curved portion being located between the opposite lateral side edges of the platform whereby light from the end sections overlaps light from the middle section to produce uniform light on the platform.

2. The light source of claim 1 wherein each of the angles between the middle section and the opposite end sections is substantially 90°

.

3. The light source of claim 1 wherein each of the angles between the middle section and the opposite end sections is greater than 90°

.

4. The light source of claim 1 wherein each of the angles between the middle section and the opposite end sections is less than 90°

.

5. The light source of claim 1 wherein the end sections are substantially parallel to the platform.

6. The light source of claim 1 wherein the end sections extend from the middle section towards the platform.