Novel optical system of helmet display unit

Abstract

The invention discloses a new optical system for helmet display; it relates a light, compact and well optical aberration correction adjustable focus optical system, it can be used as visual optical system for perspective helmet display apparatus. The visual optical system comprises a group of eyepiece lens and a built-up prism construction. The eyepiece lens comprises at least a penetrance element. The built-up prism construction comprises at least a concave reflector, at least a half reflecting and half translucenting optical surface, light reflects at least two times between the optical surfaces, the refractivity of the polarizability full filled in the space between the optical surfaces. The visual optical system uses mini LCD as image plane display equipment, it can fuse the image sent from the image source in internal channel by the visual optical system with the image outside, making the said image form at infinite distance in the direction of observation, and it can focus to a point limited distance from the observer.

Description

technical field [0001] The invention is a novel optical system of a helmet display, which relates to a light, compact and adjustable focus optical system with good aberration correction, which can be used as a visual optical system of a see-through helmet display device. Background technique [0002] Head-Mounted Display (HMD) can expand scientific 3D visualization and enhance user-computer interaction performance. Development and other fields have received extensive attention. Due to their different application fields, they can be divided into single-channel (immersion) helmet displays for virtual reality (Virtual Reality, referred to as VR) and dual-channel (see-through) helmets for augmented reality (Augmented Reality, referred to as AR). monitor. The immersive head-mounted display system can completely isolate the user's observation of the real world, presenting a computer-generated world, making them completely in the virtual world. But its usual result is to isolate...

AI Technical Summary

Problems solved by technology

At the same time, the light emitted by the image source will pass through the semi-reflective and semi-transparent optical surface 3 times, that is, through the semi-reflective and semi-transparent optical surface 15 twice, and once through the semi-reflective and semi-transparent optical surface 14, so that the light energy utilization rate of the internal channel is reduced to (1 / 2)×(1 / 2)×(1 / 2)=1 / 8

Due to the need for dual-channel imaging at the same time, the problem of light energy utilization cannot be achieved by adjusting the reflection and transmittance ratio of the transflective optical surface. Increasing the light energy utilization of one channel will inevitably affect the other channel.

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