Mr. Kyung-Rok Kim Profile

Kyung-Rok Kim

Research Engineer at SAMSUNG Electronics Co Ltd

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 2 September 2008 Paper

High efficient illumination system utilizing light-guide and white light LED for document scanner application

Kyoung-Rok Kim, Hyunsurk Kim, Hyeongchae Kim

Proceedings Volume 7059, 70590H (2008) https://doi.org/10.1117/12.794559

KEYWORDS: Light emitting diodes, Scanners, CCD image sensors, Charge-coupled devices, Waveguides, Light scattering, Prisms, Computer simulations, Reflectivity

Read Abstract +

Design and evaluation of new illumination system utilizing white light emitting diode (LED) and plastic light-guide for letter-size (216mm width) document scanner and copier have been performed. We investigated the best condition for illumination on document plane through the optical analysis of scanner imaging system. To compensate the relative illumination fall-off caused by imaging lens, illumination on main-direction was designed to edge enhanced distribution. The illumination on sub-direction was designed to flat-top shape for stable performance against mechanical displacement of optics. The light-guide was designed dual-angled sidewalls for the decrease of light leakage and the increase of the degree of freedom for illumination shaping. The rear area of a light-guide is formed with crossed micro-prism patterns to axial direction to induce scattering of guided light, and the front area is formed with lens-shape for efficient lighting. Total 12 parameters were used for the optimization of design, and the various relationships between parameters and performances were also investigated. The optical characteristics of the proposed illumination system utilizing a white LED and light-guide, fabricated by mold process, were also experimentally evaluated in terms of illumination distribution against main- and sub-direction on image plane. They showed excellent agreement with simulated result and showed good performance of uniformity above 91%, and 89% in sub-direction and main-direction, respectively.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years