Pixel placement errors due to misalignment of internal drum writing engines

Edward L. Kelley

doi:10.1117/12.2322256

1 May 1992 Pixel placement errors due to misalignment of internal drum writing engines

Edward L. Kelley

Proceedings Volume 1670, Color Hard Copy and Graphic Arts; (1992) https://doi.org/10.1117/12.2322256
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

Image geometric accuracy in large format color separation quality writing engines or output scanners requires careful control of the opto—mechanical alignment of engine subsystems. Internal drum scanners are particularly sensitive to misalignment of the spinner, drum and spinner linear transport axes relative to each other. Misalignment of these axes leads to significant errors in cross—scan and in-scan pixel placement in the written image. A method is presented for determining alignment sensitivity of internal drum output scanners by tracing only the principal ray through the system and systematically manipulating engine component axes with the ray trace model. The model traces deviated rays through the misaligned system providing data on placement of pixels in the written image. This method provides an efficient means of determining system sensitivity to various alignment conditions and allows system tolerances to be apportioned appropriately.

Citation Download Citation

Edward L. Kelley "Pixel placement errors due to misalignment of internal drum writing engines", Proc. SPIE 1670, Color Hard Copy and Graphic Arts, (1 May 1992); https://doi.org/10.1117/12.2322256

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available