Optical system of reflective helmet-mounted display based on antigas mask

Abstract

The invention discloses an optical system of a reflective helmet-mounted display based on an antigas mask. The optical system is characterized by comprising a hypertorus toroidal reflector and a relay system, wherein the reflector is provided with a hypertorus toroidal surface; and light rays are emitted from a micro display screen, pass through the relay system and the reflector in sequence, and finally enter human eye pupils. The optical system has the advantages as follows: the size of the system is small and the weight of the system is light; as the inclination angles of a mechanical shaft of the reflector and main light ray of a zero view field are zero and the reflection surface is plated with a narrow-band high-reflection film, dual-channel displaying can be achieved; and as the dual-channel displaying is adopted, the whole helmet-mounted display hardly blocks the view field, and the human eyes do not need to deflect when watching, so that the comfortableness is improved.

Description

technical field [0001] The invention relates to an optical system, in particular to an optical system of a helmet display. Background technique [0002] Head Mounted Display (HMD), referred to as HMD, is divided into half-projection type and full-projection type. It can enlarge the image generated by the small two-dimensional display through the optical system, and display the collimated image to infinity or a place far enough away. into a screen effect tens of meters away. Since the head-mounted display device is mounted on the observer's head, it must be compact and lightweight to reduce the load on the observer. With the increase of the observation field of view, the observation range will also increase, and the observer can observe high-quality dynamic images more fully. For head-mounted display systems, a large field of view is also very important. The field of view, exit pupil diameter, and focal length of the optical system are mutually restrictive, and it is quite...

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Problems solved by technology

[0005] The article "Head Mounted Display for Fire Fighters" published in "IFAWC2006,Mobile Research Center, TZI University Bremen.Germany" (IFAWC2006, Oz Mobile Research Center, University of Bremen, Germany) was designed for firefighters The HMD system of the NBC operator also involves the HMD system of the NBC operator. This kind of HMD is a full projection type, which only has a single channel and cannot watch external information at the same time.

Moreover, in order to reduce the obstruction of the line of sight, the zero-field chief ray of the HMD has a large deviation angle from the direction of the line of sight directly in front of the human eye. The human eye needs to turn a large angle when viewing, and it will be very tiring to watch for a long time

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