Free-form surface goggles-based see-through helmet mounted display device

Abstract

The invention discloses a free-form surface goggles-based see-through helmet mounted display device. A pair of free-form surface goggles is arranged in front of a helmet body, wherein micro-display imaging devices and relay lens assemblies are arranged in front of the helmet body and on the two sides of the upper part of the free-form surface goggles respectively; the two relay lens assemblies are arranged at an inclination angle of 42 degrees; each relay lens assembly comprises a first relay lens, a second relay lens, a third relay lens, a fourth relay lens, a fifth relay lens and a sixth relay lens; and the first relay lens, the second relay lens, the third relay lens, the fourth relay lens, the fifth relay lens and the sixth relay lens are arranged in turn. In the device, a tire tread-shaped free-form surface is used for imaging, so the device can realize a large off-axis angle of 33 degrees, correct the aberration well and obviously improve the imaging quality and has a simple structure; the device is suitable to be arranged on a human head and conforms to the characteristic of man-machine efficacy; and by using the design of a short-focus large angle of view, the device has an exit pupil of between 12 and 15mm and an angle of view of between 40 and 50 degrees.

Description

technical field [0001] The invention relates to a penetrating helmet display device based on free-form surface goggles. Background technique [0002] After more than 30 years of development, especially in recent years, the technology of the helmet-mounted display has made great progress. The helmet-mounted display was first used in virtual reality. The feeling of being in a virtual environment. Head-mounted displays are widely used in virtual reality, visual training, medicine, aviation, entertainment and other occasions, and have a huge application market. HMD can be divided into immersion type and penetrating type according to its application. The immersion type is to block the external signal of the helmet and only display the internal signal generated by the helmet. The penetrating type is just the opposite. It superimposes the internal signal and the external scene of the helmet. The helmet-mounted display can realize the superposition of internal virtual signals and ...

AI Technical Summary

Problems solved by technology

The projection structure belongs to the Pupilforming form, that is, the pupil plane in the optical system is conjugate to the eye exit pupil. Although the eyepiece structure has the advantages of simple structure and color display, it also has the disadvantage of difficult aberration correction under the condition of large field of view. The projection form has the characteristics of high imaging definition, but at the same time, it also has the disadvantage of being limited by the type and position of the folding screen.

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