Onboard goggle-type helmet display optical system

Abstract

The invention discloses an onboard goggle-type helmet display optical system, and provides a large-field optical display system. The optical display system comprises an image source, a relay lens assembly, a prism assembly and a concave surface reflector along optical axis direction in sequence, wherein, the concave surface reflector receives and reflects image light of the image source from the prism assembly; the concave surface reflector has a bending angle corresponding to the image source, thus asymmetric astigmation is generated in the reflection image; the bending angle is defined as an included angle between an optical axis and a normal line of each point of the inner surface of the concave surface reflector; the relay lens assembly is composed of three groups of a front group, a middle group and a rear group; each group respectively comprises a plurality of lens; the front group closes to the prism assembly, the rear group closes to the image source, and the middle group is positioned between the front group and the rear group in the optical axis direction; the three groups of the front group, the middle group and the rear group can be respectively used as a whole to translate and rotate to form a crossing angle between the local area shafts of the front group lens, the middle group lens and the rear group lens, thus compensating the asymmetric astigmation of the optical display system.

Description

technical field [0001] The invention relates to the field of asymmetric aberration correction of a catadioptric off-axis imaging system, in particular to an optical technology for eliminating aberrations and improving image quality of an airborne goggle-type helmet-mounted display optical system. Background technique [0002] The on-board goggle-type helmet-mounted display projects the necessary flight parameter information and aiming information onto the goggles in front of the pilot, so that the pilot can see the information reflected by the goggles and the surrounding environment at the same time. The typical related patents that have been published include U.S. Pat. No. 3940204. The goggle-type helmet-mounted display in the patent uses a CRT as an image source. The CRT is fixed on one side of the helmet. The image displayed by the CRT is first transmitted forward by the relay optical component. Then it is turned by the prism assembly and projected onto the curved goggles...

AI Technical Summary

Problems solved by technology

However, a major problem with this structure is that the beam splitter in front of the pilot's eyes significantly reduces the eye-point distance of the airborne helmet-mounted display, which limits the application of this structure

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