Design of a zoom projection optical system for high resolution projector

Guang Qin; Xuewu Fan; Zixuan Ma; Gengyao Zhang

doi:10.1117/12.2579880

5 November 2020 Design of a zoom projection optical system for high resolution projector

Guang Qin, Xuewu Fan, Zixuan Ma, Gengyao Zhang

Proceedings Volume 11565, AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics; 1156508 (2020) https://doi.org/10.1117/12.2579880
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

With the rapidly development of optoelectronic technology and computer technology, the projection display technology has also been unprecedentedly developed. In this paper, a zoom projection objective lens is designed based on Digital Light Processing (DLP) projection display technology, the 0.47in DMD chip of Texas Instruments is selected in this paper, its resolution is 1920×1080 and its micromirror pitch is 5.4 μm. The optical system uses a 100% offset transmissive projection structure. The working wavelength of the whole zoom projection lens is visible light, and 14 lenses including protective glass are used for the projection lens, each lens in the designed system is spherical, the total length of the system is 220mm, the aperture of the optical system is about 58mm , focal length of the zoom projection lens ranges from 25mm to 32 mm, viewing angle ranges from 41 degree to 51 degree , and F number is 1.7 , the distortion of the designed system is less than 3%, the projected image plane relative illumination of the zoom projection lens above 90% , the telecentricity of the system is less than 1 degree. The MTF value is close to 0.3 at the Nyquist frequency 93 lp/mm for the full field of view, the designed system meet the requirements of projection. In order to meet the current processing level, the radius of curvature tolerance, the spacing tolerance, the eccentricity tolerance and the tilt tolerance are analyzed. The results show that the zoom projection lens is easy to process and produce.

Citation Download Citation

Guang Qin, Xuewu Fan, Zixuan Ma, and Gengyao Zhang "Design of a zoom projection optical system for high resolution projector", Proc. SPIE 11565, AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics, 1156508 (5 November 2020); https://doi.org/10.1117/12.2579880

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KEYWORDS

Zoom lenses

Objectives

Projection systems

Display technology

Digital micromirror devices

Distortion

Tolerancing

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