Etendue conserving light shaping using microlens arrays with irregular lenslets

Chen Li; Peter Schreiber; Dirk Michaelis; Christoph Wächter; Stephanie Fischer; Uwe D. Zeitner

doi:10.1117/12.2313803

28 May 2018 Etendue conserving light shaping using microlens arrays with irregular lenslets

Chen Li, Peter Schreiber, Dirk Michaelis, Christoph Wächter, Stephanie Fischer, Uwe D. Zeitner

Proceedings Volume 10693, Illumination Optics V; 1069304 (2018) https://doi.org/10.1117/12.2313803
Event: SPIE Optical Systems Design, 2018, Frankfurt, Germany

Abstract

Light shaping optics often generate continuously varying or homogeneous far-field distributions: Diffusers or free-form beam shapers are well-suited for transforming a given incident angular distribution into a continuous far-field distribution, while etendue conserving fly´s eye condensers excel in producing homogeneous top-hat far-fields, independent of the incident spatial and angular light distribution. The proposed optics combines the advantages of these light shaping optics in generating continuously varying far-field distributions independently from the incoming light distribution while conserving etendue. The light shaping systems consists of a high fill factor tandem microlens array featuring irregular lenslets with individual aperture size and individual decentration of lens vertex and and lens aperture w.r.t. array channel axis. We present design examples to be realized as monolithic polymer-on-glass tandem arrays, mastered by grayscale lithography. Applications of this light shaping approach are LED-spotlights with particular farfield specifications and small design envelope e.g. for automotive or general lighting.

Citation Download Citation

Chen Li, Peter Schreiber, Dirk Michaelis, Christoph Wächter, Stephanie Fischer, and Uwe D. Zeitner "Etendue conserving light shaping using microlens arrays with irregular lenslets", Proc. SPIE 10693, Illumination Optics V, 1069304 (28 May 2018); https://doi.org/10.1117/12.2313803

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