An off-axis aspheric goggle optical system

Abstract

The present invention is an off-axis aspheric goggle optical system. The present invention adopts off-axis eccentric placement of liquid crystal (Liquid Crystal Display, LCD) image surface, off-axis eccentric lens and wedge lens to correct off-axis aberration, and adopts Design method of off-axis aspheric goggles optical system with quadric goggles and relay lens coupled. Compared with the prior art, the present invention has advantages, characteristics or positive effects: 1. The circular field of view of the off-axis optical system is 25 degrees, and the exit pupil is 10mm, which has the characteristics of large field of view and large exit pupil; 2. The energy attenuation of the optical system is small, and the output energy is 4 times that of the general coaxial optical system; 3. The imaging quality of the optical system is high, the center field of view, the MTF value at 50lp / mm is not less than 0.5, and the edge field of view is 50lp / mm The MTF value is not less than 0.5; 4. The weight of the optical system is light, less than 40g; 5. The length of the optical system is shorter, which is more suitable for arrangement on the helmet.

Description

An off-axis aspheric goggle optical system technical field The invention relates to an off-axis aspheric goggle optical system, which belongs to the technical field of optical systems and is used for a helmet display. Background technique Helmet Display (HMD) is an emerging airborne display / aiming system. Because it has many unique advantages and can better meet the needs of modern warfare, its development has been valued by the military of various countries, and its performance in all aspects is also constantly improving. At present, the head-mounted display optical system used in China is mainly a coaxial optical system, which refracts the image to the human eye through a half-transparent mirror, so it has a series of disadvantages such as large volume, heavy weight, and severe energy attenuation. The head-mounted optical systems used abroad are divided into two categories: coaxial optical systems and off-axis optical systems. Foreign off-axis optical systems general...

AI Technical Summary

Problems solved by technology

Off-axis goggles produce significant off-axis aberrations, and full correction for all off-axis aberrations cannot be achieved using only special prisms

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