Claims
- 1. An optical image scanner comprising:
a lens system; an iris within the lens system, the iris having at least a first aperture size and a second aperture size, the second aperture size being larger than the first aperture size; and the iris set to the first aperture size when scanning at a first speed and the iris set to the second aperture size when scanning at a second speed, the second speed faster than the first speed.
- 2. The optical image scanner of claim 1, further comprising:
the lens system having sufficiently low aberrations at the first aperture size to enable a specified modulation transfer function; and the lens system having aberrations at the second aperture size such that a resulting modulation transfer function is worse than the specified modulation transfer function.
- 3. A method for scanning comprising:
selecting a first sampling rate or a second sampling rate, the second sampling rate being higher than the first sampling rate; scanning using a first aperture size when the sampling rate is the first sampling rate; scanning using a second aperture size when the sampling rate is the second sampling rate, the first aperture size being larger than the second aperture size.
- 4. A method for scanning comprising:
selecting a first scanning speed or a second scanning speed, the second scanning speed being faster than the first scanning speed; scanning using a first aperture size when the scanning speed is the first scanning speed; scanning using a second aperture size when the scanning speed is the second scanning speed, the first aperture size being smaller than the second aperture size.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of U.S. application Ser. No. 09/614,579 (filed Jul. 12, 2000), which is a continuation-in-part of Ser. No. 09/257,459 (filed Feb. 25, 1999, abandoned). application Ser. Nos. 09/614,579 and 09/257,459 are hereby incorporated herein by reference.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09614579 |
Jul 2000 |
US |
Child |
10624245 |
Jul 2003 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09257459 |
Feb 1999 |
US |
Child |
09614579 |
Jul 2000 |
US |