Non-telecentric projection lens design for an LED projector

Wen Shing Sun; Jui-Wen Pan

doi:10.1364/AO.56.000712

Non-telecentric projection lens design for an LED projector

Wen Shing Sun, Jui-Wen Pan^*

^*Corresponding author for this work

Institute of Photonic System

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A newly designed non-telecentric projection zoom lens is proposed for a mini-projector with LED light sources. The projection lens consists of six spherical lenses. The zoom ratio of the projection lens is 1.1. At the wide condition, the working F/# can maintain at 2.4 and the throw ratio can operate at 1.23. The root mean square (RMS) spot sizes of all fields are smaller than 15 μm for all zoom ranges. The optical distortion and the TV distortion were suppressed to be smaller than 1.5% and 1%, respectively. For the image quality issue, the modulation transfer function (MTF) value for all fields is above 0.4 at 46 lp/mm for all zoom conditions. Even when the tolerance error was considered, the MTF value for all fields is still above 0.3 for all zoom conditions. Using this non-telecentric projection zoom lens, a very sharp image could be achieved with low cost. This low cost projection lens is very suitable for business applications.

Original language	English
Pages (from-to)	712-720
Number of pages	9
Journal	Applied Optics
Volume	56
Issue number	3
DOIs	https://doi.org/10.1364/AO.56.000712
State	Published - 20 Jan 2017

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Non-telecentric projection lens design for an LED projector

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