PROJECT TITLE :

Flat-Concave Dual-Mirror Configuration Design for Upright Projection-Type Ultrashort Throw Ratio Projectors

ABSTRACT:

An off-axis flat-concave twin-mirror (FCDM) configuration for an ultrashort focal length projection lens primarily based on the digital lightweight processor (DLP) upright projection-kind projector is proposed during this paper. This projection lens consists of 2 lens groups: the FCDM system and the relay optical system. The flat mirror and also the contour of the concave mirror are determined in line with the connection between the chief ray from the exit pupil of every field of read (FOV) and therefore the corresponding assigned position on the screen. A curved image is created between exit pupil and concave mirror, planning to correct field curvature. The second lens group consists of a collection of standard refractive lenses which convert a curved object onto the image panel. Primarily based on this method, a projection lens with an ultrashort throw ratio (TR) of zero.34, as well as a full FOV 139.8$^circ$ and distortion of but 1%, is designed. Additionally, the colorimetric performance, uniformity, optical potency and size of the designed projector are analyzed. Results show that the proposed projector system with high optical performance is compact and suitable for household or academic applications.